Reorganise, change license, portable makefile, and reference radharc

Signed-off-by: Mattias Andrée <maandree@kth.se>

15 files changed, 0 insertions, 6562 deletions

diff --git a/src/arg.h b/src/arg.h
deleted file mode 100644
index 0b23c53..0000000
--- a/src/arg.h
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * Copy me if you can.
- * by 20h
- */
-
-#ifndef ARG_H__
-#define ARG_H__
-
-extern char *argv0;
-
-/* use main(int argc, char *argv[]) */
-#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
-					argv[0] && argv[0][0] == '-'\
-					&& argv[0][1];\
-					argc--, argv++) {\
-				char argc_;\
-				char **argv_;\
-				int brk_;\
-				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
-					argv++;\
-					argc--;\
-					break;\
-				}\
-				for (brk_ = 0, argv[0]++, argv_ = argv;\
-						argv[0][0] && !brk_;\
-						argv[0]++) {\
-					if (argv_ != argv)\
-						break;\
-					argc_ = argv[0][0];\
-					switch (argc_)
-
-/* Handles obsolete -NUM syntax */
-#define ARGNUM				case '0':\
-					case '1':\
-					case '2':\
-					case '3':\
-					case '4':\
-					case '5':\
-					case '6':\
-					case '7':\
-					case '8':\
-					case '9'
-
-#define ARGEND			}\
-			}
-
-#define ARGC()		argc_
-
-#define ARGNUMF()	(brk_ = 1, estrtonum(argv[0], 0, INT_MAX))
-
-#define EARGF(x)	((argv[0][1] == '\0' && argv[1] == NULL)?\
-				((x), abort(), (char *)0) :\
-				(brk_ = 1, (argv[0][1] != '\0')?\
-					(&argv[0][1]) :\
-					(argc--, argv++, argv[0])))
-
-#define ARGF()		((argv[0][1] == '\0' && argv[1] == NULL)?\
-				(char *)0 :\
-				(brk_ = 1, (argv[0][1] != '\0')?\
-					(&argv[0][1]) :\
-					(argc--, argv++, argv[0])))
-
-#define LNGARG()	&argv[0][0]
-
-#endif
diff --git a/src/cg-base.c b/src/cg-base.c
deleted file mode 100644
index 9f77937..0000000
--- a/src/cg-base.c
+++ /dev/null
@@ -1,927 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <alloca.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <poll.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-
-/**
- * The process's name
- */
-const char* argv0 = NULL;
-
-/**
- * The libcoopgamma context
- */
-libcoopgamma_context_t cg;
-
-/**
- * The names of the selected CRTC:s
- */
-char** crtcs = NULL;
-
-/**
- * Gamma ramp updates for each CRTC
- */
-filter_update_t* crtc_updates = NULL;
-
-/**
- * CRTC and monitor information about
- * each selected CRTC and connect monitor
- */
-libcoopgamma_crtc_info_t* crtc_info = NULL;
-
-/**
- * The number of selected CRTC:s
- */
-size_t crtcs_n = 0;
-
-/**
- * The number of filters
- */
-size_t filters_n = 0;
-
-
-/**
- * Contexts for asynchronous ramp updates
- */
-static libcoopgamma_async_context_t* asyncs = NULL;
-
-/**
- * The number of pending receives
- */
-static size_t pending_recvs = 0;
-
-/**
- * Whether message must be flushed
- */
-static int flush_pending = 0;
-
-
-
-/**
- * Data used to sort CRTC:s
- */
-struct crtc_sort_data
-{
-  /**
-   * The gamma ramp type
-   */
-  libcoopgamma_depth_t depth;
-  
-  /**
-   * Should be 0
-   */
-  int __padding;
-  
-  /**
-   * The size of the red gamma ramp
-   */
-  size_t red_size;
-  
-  /**
-   * The size of the green gamma ramp
-   */
-  size_t green_size;
-  
-  /**
-   * The size of the blue gamma ramp
-   */
-  size_t blue_size;
-  
-  /**
-   * The index of the CRTC
-   */
-  size_t index;
-};
-
-
-
-/**
- * Compare two strings
- * 
- * @param   a  Return -1 if this string is `NULL` or less than `b`
- * @param   b  Return +1 if this string is less than `a`
- * @return     See `a` and `b`, 0 is returned if `a` and `b` are equal
- */
-static int nulstrcmp(const char *a, const char *b)
-{
-  return (a == NULL) ? -1 : strcmp(a, b);
-}
-
-
-/**
- * Compare two instances of `crtc_sort_data`
- * 
- * @param   a_  Return -1 if this one is lower
- * @param   b_  Return +1 if this one is higher
- * @return      See `a_` and `b_`, only -1 or +1 can be returned
- */
-static int crtc_sort_data_cmp(const void* a_, const void* b_)
-{
-  const struct crtc_sort_data* a = a_;
-  const struct crtc_sort_data* b = b_;
-  int cmp = memcmp(a, b, sizeof(*a) - sizeof(a->index));
-  return cmp ? cmp : a->index < b->index ? -1 : +1;
-}
-
-
-/**
- * Make elements in `crtc_updates` slaves where appropriate
- * 
- * @return  Zero on success, -1 on error
- */
-int make_slaves(void)
-{
-  struct crtc_sort_data* data;
-  size_t i, j, n = 0, master = 0, master_i;
-  
-  data = alloca(filters_n * sizeof(*data));
-  memset(data, 0, filters_n * sizeof(*data));
-  for (i = 0; i < filters_n; i++)
-    {
-      if (!(crtc_info[crtc_updates[i].crtc].supported))
-	continue;
-      
-      data[n].depth      = crtc_updates[i].filter.depth;
-      data[n].red_size   = crtc_updates[i].filter.ramps.u8.red_size;
-      data[n].green_size = crtc_updates[i].filter.ramps.u8.green_size;
-      data[n].blue_size  = crtc_updates[i].filter.ramps.u8.blue_size;
-      data[n].index      = i;
-      n++;
-    }
-  
-  qsort(data, n, sizeof(*data), crtc_sort_data_cmp);
-  if (n == 0)
-    return 0;
-  
-  master_i = data[0].index;
-  for (i = 1; i < n; i++)
-    if (memcmp(data + i, data + master, sizeof(*data) - sizeof(data->index)))
-      {
-	if (master + 1 < i)
-	  {
-	    crtc_updates[master_i].slaves = calloc(i - master, sizeof(size_t));
-	    if (crtc_updates[master_i].slaves == NULL)
-	      return -1;
-	    for (j = 1; master + j < i; j++)
-	      crtc_updates[master_i].slaves[j - 1] = data[master + j].index;
-	  }
-	master = i;
-	master_i = data[master].index;
-      }
-    else
-      {
-	libcoopgamma_ramps_destroy(&(crtc_updates[data[i].index].filter.ramps.u8));
-	crtc_updates[data[i].index].master = 0;
-	crtc_updates[data[i].index].filter.ramps.u8 = crtc_updates[master_i].filter.ramps.u8;
-      }
-  
-  if (master + 1 < i)
-    {
-      crtc_updates[master_i].slaves = calloc(i - master, sizeof(size_t));
-      if (crtc_updates[master_i].slaves == NULL)
-	return -1;
-      for (j = 1; master + j < i; j++)
-	crtc_updates[master_i].slaves[j - 1] = data[master + j].index;
-    }
-  
-  return 0;
-}
-
-
-/**
- * Update a filter and synchronise calls
- * 
- * @param   index    The index of the CRTC
- * @param   timeout  The number of milliseconds a call to `poll` may block,
- *                   -1 if it may block forever
- * @return           1: Success, no pending synchronisations
- *                   0: Success, with still pending synchronisations
- *                   -1: Error, `errno` set
- *                   -2: Error, `cg.error` set
- * 
- * @throws  EINTR   Call to `poll` was interrupted by a signal
- * @throws  EAGAIN  Call to `poll` timed out
- */
-int update_filter(size_t index, int timeout)
-{
-  filter_update_t* filter = crtc_updates + index;
-  
-  if (!(filter->synced) || filter->failed)
-    abort();
-  
-  pending_recvs += 1;
-  
-  if (libcoopgamma_set_gamma_send(&(filter->filter), &cg, asyncs + index) < 0)
-    switch (errno)
-      {
-      case EINTR:
-      case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
-      case EWOULDBLOCK:
-#endif
-	flush_pending = 1;
-	break;
-      default:
-	return -1;
-      }
-  
-  filter->synced = 0;
-  return synchronise(timeout);
-}
-
-
-/**
- * Synchronised calls
- * 
- * @param   timeout  The number of milliseconds a call to `poll` may block,
- *                   -1 if it may block forever
- * @return           1: Success, no pending synchronisations
- *                   0: Success, with still pending synchronisations
- *                   -1: Error, `errno` set
- *                   -2: Error, `cg.error` set
- * 
- * @throws  EINTR   Call to `poll` was interrupted by a signal
- * @throws  EAGAIN  Call to `poll` timed out
- */
-int synchronise(int timeout)
-{
-  struct pollfd pollfd;
-  size_t selected;
-  
-  pollfd.fd = cg.fd;
-  pollfd.events = POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI;
-  if (flush_pending > 0)
-    pollfd.events |= POLLOUT;
-  
-  pollfd.revents = 0;
-  if (poll(&pollfd, (nfds_t)1, timeout) < 0)
-    return -1;
-  
-  if (pollfd.revents & (POLLOUT | POLLERR | POLLHUP | POLLNVAL))
-    {
-      if (libcoopgamma_flush(&cg) < 0)
-	goto sync;
-      flush_pending = 0;
-    }
-  
-  if ((timeout < 0) && (pending_recvs > 0))
-    if (!(pollfd.revents & (POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI)))
-      {
-	pollfd.revents = 0;
-	if (poll(&pollfd, (nfds_t)1, -1) < 0)
-	  return -1;
-      }
-  
- sync:
-  if (pollfd.revents & (POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI | POLLERR | POLLHUP | POLLNVAL))
-    for (;;)
-      {
-	if (libcoopgamma_synchronise(&cg, asyncs, filters_n, &selected) < 0)
-	  {
-	    if (errno == 0)
-	      continue;
-	    else
-	      goto fail;
-	  }
-	if (crtc_updates[selected].synced)
-	  continue;
-	crtc_updates[selected].synced = 1;
-	pending_recvs -= 1;
-	if (libcoopgamma_set_gamma_recv(&cg, asyncs + selected) < 0)
-	  {
-	    if (cg.error.server_side)
-	      {
-		crtc_updates[selected].error = cg.error;
-		crtc_updates[selected].failed = 1;
-		memset(&(cg.error), 0, sizeof(cg.error));
-	      }
-	    else
-	      goto cg_fail;
-	  }
-      }
-  
-  return pending_recvs == 0;
- cg_fail:
-  return -2;
- fail:
-  switch (errno)
-    {
-    case EINTR:
-    case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
-    case EWOULDBLOCK:
-#endif
-      return pending_recvs == 0;
-    default:
-      return -1;
-    }
-}
-
-
-/**
- * Initialise the process, specifically
- * reset the signal mask and signal handlers
- * 
- * @return  Zero on success, -1 on error
- */
-static int initialise_proc(void)
-{
-  sigset_t sigmask;
-  int sig;
-  
-  for (sig = 1; sig < _NSIG; sig++)
-    if (signal(sig, SIG_DFL) == SIG_ERR)
-      if (sig == SIGCHLD)
-	return -1;
-  
-  if (sigemptyset(&sigmask) < 0)
-    return -1;
-  if (sigprocmask(SIG_SETMASK, &sigmask, NULL) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, a list of all
- * recognised adjustment methods
- * 
- * @return  Zero on success, -1 on error
- */
-static int list_methods(void)
-{
-  char** list;
-  size_t i;
-  
-  list = libcoopgamma_get_methods();
-  if (list == NULL)
-    return -1;
-  for (i = 0; list[i]; i++)
-    printf("%s\n", list[i]);
-  free(list);
-  if (fflush(stdout) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, a list of all CRTC:s
- * 
- * A connection to the coopgamma server
- * must have been made
- * 
- * @return  Zero on success, -1 on error, -2
- *          on libcoopgamma error
- */
-static int list_crtcs(void)
-{
-  char** list;
-  size_t i;
-  
-  list = libcoopgamma_get_crtcs_sync(&cg);
-  if (list == NULL)
-    return -2;
-  for (i = 0; list[i]; i++)
-    printf("%s\n", list[i]);
-  free(list);
-  if (fflush(stdout) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Fill the list of CRTC information
- * 
- * @return  Zero on success, -1 on error, -2
- *          on libcoopgamma error
- */
-static int get_crtc_info(void)
-{
-  size_t i, unsynced = 0, selected;
-  char* synced;
-  int need_flush = 0;
-  struct pollfd pollfd;
-  
-  synced = alloca(crtcs_n * sizeof(*synced));
-  memset(synced, 0, crtcs_n * sizeof(*synced));
-  
-  i = 0;
-  pollfd.fd = cg.fd;
-  pollfd.events = POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI;
-  
-  while ((unsynced > 0) || (i < crtcs_n))
-    {
-    wait:
-      if (i < crtcs_n)
-	pollfd.events |= POLLOUT;
-      else
-	pollfd.events &= ~POLLOUT;
-      
-      pollfd.revents = 0;
-      if (poll(&pollfd, (nfds_t)1, -1) < 0)
-	goto fail;
-      
-      if (pollfd.revents & (POLLOUT | POLLERR | POLLHUP | POLLNVAL))
-	{
-	  if (need_flush && (libcoopgamma_flush(&cg) < 0))
-	    goto send_fail;
-	  need_flush = 0;
-	  for (; i < crtcs_n; i++)
-	    if (unsynced++, libcoopgamma_get_gamma_info_send(crtcs[i], &cg, asyncs + i) < 0)
-	      goto send_fail;
-	  goto send_done;
-	send_fail:
-	  switch (errno)
-	    {
-	    case EINTR:
-	    case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
-	    case EWOULDBLOCK:
-#endif
-	      i++;
-	      need_flush = 1;
-	      break;
-	    default:
-	      goto fail;
-	    }
-	}
-    send_done:
-      
-      if ((unsynced == 0) && (i == crtcs_n))
-	break;
-      
-      if (pollfd.revents & (POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI))
-	while (unsynced > 0)
-	  switch (libcoopgamma_synchronise(&cg, asyncs, i, &selected))
-	    {
-	    case 0:
-	      if (synced[selected])
-		{
-		  libcoopgamma_skip_message(&cg);
-		  break;
-		}
-	      synced[selected] = 1;
-	      unsynced -= 1;
-	      if (libcoopgamma_get_gamma_info_recv(crtc_info + selected, &cg, asyncs + selected) < 0)
-		goto cg_fail;
-	      break;
-	    case -1:
-	      switch (errno)
-		{
-		case 0:
-		  break;
-		case EINTR:
-		case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
-		case EWOULDBLOCK:
-#endif
-		  goto wait;
-		default:
-		  goto fail;
-		}
-	      break;
-	    }
-    }
-  
-  return 0;
- fail:
-  return -1;
- cg_fail:
-  return -2;
-}
-
-
-/**
- * -M METHOD
- *     Select adjustment method. If METHOD is "?",
- *     available methods will be printed to stdout.
- * 
- * -S SITE
- *     Select site (display server instance).
- * 
- * -c CRTC
- *     Select CRT controller. If CRTC is "?", CRTC:s
- *     will be printed to stdout.
- *     
- *     This option can be used multiple times. If it
- *     is not used at all, all CRTC:s will be selected.
- * 
- * -p PRIORITY
- *     Select the priority for the filter, this should
- *     be a signed two's-complement integer. If
- *     PRIORITY is "?", the default priority for the
- *     program is printed to stdout.
- * 
- * -R RULE
- *     The rule of the filter, that is, the last part
- *     of the class which is its identifier. If RULE
- *     is "?" the default rule is printed to stdout,
- *     if RULE is "??" the default class is printed
- *     to stdout.
- * 
- * @param   argc  The number of command line arguments
- * @param   argv  The command line arguments
- * @return        0 on success, 1 on error
- */
-int main(int argc, char* argv[])
-{
-  int stage = 0;
-  int dealloc_crtcs = 0;
-  int rc = 0;
-  char* method = NULL;
-  char* site = NULL;
-  size_t crtc_i = 0;
-  int64_t priority = default_priority;
-  char* prio = NULL;
-  char* rule = NULL;
-  char* class = default_class;
-  char** classes = NULL;
-  size_t classes_n = 0;
-  int explicit_crtcs = 0;
-  int have_crtc_q = 0;
-  size_t i, filter_i;
-  
-  argv0 = *argv++, argc--;
-  
-  if (initialise_proc() < 0)
-    goto fail;
-  
-  crtcs = alloca(argc * sizeof(*crtcs));
-  
-  for (; *argv; argv++, argc--)
-    {
-      char* args = *argv;
-      char opt[3];
-      if (!strcmp(args, "--"))
-	{
-	  argv++, argc--;
-	  break;
-	}
-      opt[0] = *args++;
-      opt[2] = '\0';
-      if ((*opt != '-') && (*opt != '+'))
-	break;
-      while (*args)
-	{
-	  char* arg;
-	  int at_end;
-	  opt[1] = *args++;
-	  arg = args;
-	  if ((at_end = !*arg))
-	    arg = argv[1];
-	  if (!strcmp(opt, "-M"))
-	    {
-	      if ((method != NULL) || ((method = arg) == NULL))
-		usage();
-	    }
-	  else if (!strcmp(opt, "-S"))
-	    {
-	      if ((site != NULL) || ((site = arg) == NULL))
-		usage();
-	    }
-	  else if (!strcmp(opt, "-c"))
-	    {
-	      if (arg == NULL)
-		usage();
-	      crtcs[crtc_i++] = arg;
-	      explicit_crtcs = 1;
-	      if (!have_crtc_q && !strcmp(arg, "?"))
-		have_crtc_q = 1;
-	    }
-	  else if (!strcmp(opt, "-p"))
-	    {
-	      if ((prio != NULL) || ((prio = arg) == NULL))
-		usage();
-	    }
-	  else if (!strcmp(opt, "-R"))
-	    {
-	      if ((rule != NULL) || ((rule = arg) == NULL))
-		usage();
-	    }
-	  else
-	    switch (handle_opt(opt, arg))
-	      {
-	      case 0:
-		goto next_opt;
-	      case 1:
-		break;
-	      default:
-		goto fail;
-	      }
-	  argv += at_end;
-	  argc -= at_end;
-	  break;
-	next_opt:;
-	}
-    }
-  
-  crtcs_n = crtc_i;
-  crtcs[crtc_i] = NULL;
-  if (!have_crtc_q && nulstrcmp(method, "?") &&
-      nulstrcmp(rule, "?") && nulstrcmp(rule, "??") &&
-      ((default_priority == NO_DEFAULT_PRIORITY) || nulstrcmp(prio, "?")))
-    if (handle_args(argc, argv, prio) < 0)
-      goto fail;
-  
-  if (default_priority != NO_DEFAULT_PRIORITY)
-    {
-      if (!nulstrcmp(prio, "?"))
-	{
-	  printf("%" PRIi64 "\n", priority);
-	  return 0;
-	}
-      else if (prio != NULL)
-	{
-	  char *end;
-	  errno = 0;
-	  priority = (int64_t)strtoll(prio, &end, 10);
-	  if (errno || *end || !*prio)
-	    usage();
-	}
-    }
-  
-  if (!nulstrcmp(rule, "??"))
-    {
-      size_t i;
-      if (*class_suffixes == NULL)
-	printf("%s\n", class);
-      else
-	for (i = 0; class_suffixes[i] != NULL; i++)
-	  printf("%s%s\n", class, class_suffixes[i]);
-      return 0;
-    }
-  else if (!nulstrcmp(rule, "?"))
-    {
-      printf("%s\n", strstr(strstr(class, "::") + 2, "::") + 2);
-      return 0;
-    }
-  else if (rule != NULL)
-    {
-      char* p = strstr(strstr(class, "::") + 2, "::") + 2;
-      size_t n = (size_t)(p - class);
-      class = alloca(strlen(rule) + n + (size_t)1);
-      memcpy(class, default_class, n);
-      strcpy(class + n, rule);
-      if (strchr(class, '\n'))
-	{
-	  fprintf(stderr, "%s: LF character is not allowed in the filter's class\n", argv0);
-	  goto custom_fail;
-	}
-    }
-  
-  if (!nulstrcmp(method, "?"))
-    {
-      if (list_methods() < 0)
-	goto fail;
-      return 0;
-    }
-  
-  if (libcoopgamma_context_initialise(&cg) < 0)
-    goto fail;
-  stage++;
-  if (libcoopgamma_connect(method, site, &cg) < 0)
-    {
-      fprintf(stderr, "%s: server failed to initialise\n", argv0);
-      goto custom_fail;
-    }
-  stage++;
-  
-  if (have_crtc_q)
-    switch (list_crtcs())
-      {
-      case 0:
-	goto done;
-      case -1:
-	goto fail;
-      default:
-	goto cg_fail;
-      }
-  
-  if (crtcs_n == 0)
-    {
-      crtcs = libcoopgamma_get_crtcs_sync(&cg);
-      if (crtcs == NULL)
-	goto cg_fail;
-      dealloc_crtcs = 1;
-      for (; crtcs[crtcs_n] != NULL; crtcs_n++);
-    }
-  
-  if (crtcs_n == 0)
-    {
-      fprintf(stderr, "%s: no CRTC:s are available\n", argv0);
-      goto custom_fail;
-    }
-  
-  if (*class_suffixes == NULL)
-    {
-      classes = &class;
-      classes_n = 1;
-    }
-  else
-    {
-      size_t len = strlen(class);
-      while (class_suffixes[classes_n])
-	classes_n++;
-      classes = alloca(classes_n * sizeof(*classes));
-      for (i = 0; i < classes_n; i++)
-	{
-	  classes[i] = alloca(len + strlen(class_suffixes[i]) + sizeof(":"));
-	  stpcpy(stpcpy(stpcpy(classes[i], class), ":"), class_suffixes[i]);
-	}
-    }
-  filters_n = classes_n * crtcs_n;
-  
-  crtc_info = alloca(crtcs_n * sizeof(*crtc_info));
-  memset(crtc_info, 0, crtcs_n * sizeof(*crtc_info));
-  for (crtc_i = 0; crtc_i < crtcs_n; crtc_i++)
-    if (libcoopgamma_crtc_info_initialise(crtc_info + crtc_i) < 0)
-      goto cg_fail;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 1) < 0)
-    goto fail;
-  
-  asyncs = alloca(filters_n * sizeof(*asyncs));
-  memset(asyncs, 0, filters_n * sizeof(*asyncs));
-  for (filter_i = 0; filter_i < filters_n; filter_i++)
-    if (libcoopgamma_async_context_initialise(asyncs + filter_i) < 0)
-      goto fail;
-  
-  switch (get_crtc_info())
-    {
-    case 0:
-      break;
-    case -1:
-      goto fail;
-    case -2:
-      goto cg_fail;
-    }
-  
-  for (crtc_i = 0; crtc_i < crtcs_n; crtc_i++)
-    {
-      if (explicit_crtcs && !(crtc_info[crtc_i].supported))
-	fprintf(stderr, "%s: warning: gamma adjustments not supported on CRTC: %s\n",
-		argv0, crtcs[crtc_i]);
-      if (crtc_info[crtc_i].cooperative == 0)
-	fprintf(stderr, "%s: warning: cooperative gamma server not running for CRTC: %s\n",
-		argv0, crtcs[crtc_i]);
-    }
-  
-  crtc_updates = alloca(filters_n * sizeof(*crtc_updates));
-  memset(crtc_updates, 0, filters_n * sizeof(*crtc_updates));
-  for (filter_i = i = 0; i < classes_n; i++)
-    for (crtc_i = 0; crtc_i < crtcs_n; crtc_i++, filter_i++)
-      {
-	if (libcoopgamma_filter_initialise(&(crtc_updates[filter_i].filter)) < 0)
-	  goto fail;
-	if (libcoopgamma_error_initialise(&(crtc_updates[filter_i].error)) < 0)
-	  goto fail;
-	crtc_updates[filter_i].crtc = crtc_i;
-	crtc_updates[filter_i].synced = 1;
-	crtc_updates[filter_i].failed = 0;
-	crtc_updates[filter_i].master = 1;
-	crtc_updates[filter_i].slaves = NULL;
-	crtc_updates[filter_i].filter.crtc                = crtcs[crtc_i];
-	crtc_updates[filter_i].filter.class               = classes[i];
-	crtc_updates[filter_i].filter.priority            = priority;
-	crtc_updates[filter_i].filter.depth               = crtc_info[crtc_i].depth;
-	crtc_updates[filter_i].filter.ramps.u8.red_size   = crtc_info[crtc_i].red_size;
-	crtc_updates[filter_i].filter.ramps.u8.green_size = crtc_info[crtc_i].green_size;
-	crtc_updates[filter_i].filter.ramps.u8.blue_size  = crtc_info[crtc_i].blue_size;
-	switch (crtc_updates[filter_i].filter.depth)
-	  {
-#define X(CONST, MEMBER, MAX, TYPE)\
-	    case CONST:\
-	      libcoopgamma_ramps_initialise(&(crtc_updates[filter_i].filter.ramps.MEMBER));\
-	      libclut_start_over(&(crtc_updates[filter_i].filter.ramps.MEMBER), MAX, TYPE, 1, 1, 1);\
-	      break;
-LIST_DEPTHS
-#undef X
-	  default:
-	    fprintf(stderr, "%s: internal error: gamma ramp type is unrecognised: %i\n",
-		    argv0, crtc_updates[filter_i].filter.depth);
-	    goto custom_fail;
-	  }
-      }
-  
-  switch (start())
-    {
-    case 0:
-      break;
-    case -1:
-      goto fail;
-    case -2:
-      goto cg_fail;
-    case -3:
-      goto custom_fail;
-    }
-  
-  for (filter_i = 0; filter_i < filters_n; filter_i++)
-    if (crtc_updates[filter_i].failed)
-      {
-	const char* side = cg.error.server_side ? "server" : "client";
-	const char* crtc = crtc_updates[filter_i].filter.crtc;
-	if (cg.error.custom)
-	  {
-	    if ((cg.error.number != 0) && (cg.error.description != NULL))
-	      fprintf(stderr, "%s: %s-side error number %" PRIu64 " for CRTC %s: %s\n",
-		      argv0, side, cg.error.number, crtc, cg.error.description);
-	    else if (cg.error.number != 0)
-	      fprintf(stderr, "%s: %s-side error number %" PRIu64 " for CRTC %s\n",
-		      argv0, side, cg.error.number, crtc);
-	    else if (cg.error.description != NULL)
-	      fprintf(stderr, "%s: %s-side error for CRTC %s: %s\n", argv0, side, crtc, cg.error.description);
-	  }
-	else if (cg.error.description != NULL)
-	  fprintf(stderr, "%s: %s-side error for CRTC %s: %s\n", argv0, side, crtc, cg.error.description);
-	else
-	  fprintf(stderr, "%s: %s-side error for CRTC %s: %s\n", argv0, side, crtc, strerror(cg.error.number));
-      }
-  
- done:
-  if (dealloc_crtcs)
-    free(crtcs);
-  if (crtc_info != NULL)
-    for (crtc_i = 0; crtc_i < crtcs_n; crtc_i++)
-      libcoopgamma_crtc_info_destroy(crtc_info + crtc_i);
-  if (asyncs != NULL)
-    for (filter_i = 0; filter_i < filters_n; filter_i++)
-      libcoopgamma_async_context_destroy(asyncs + filter_i);
-  if (stage >= 1)
-    libcoopgamma_context_destroy(&cg, stage >= 2);
-  if (crtc_updates != NULL)
-    for (filter_i = 0; filter_i < filters_n; filter_i++)
-      {
-	if (crtc_updates[filter_i].master == 0)
-	  memset(&(crtc_updates[filter_i].filter.ramps.u8), 0, sizeof(crtc_updates[filter_i].filter.ramps.u8));
-	crtc_updates[filter_i].filter.crtc = NULL;
-	crtc_updates[filter_i].filter.class = NULL;
-	libcoopgamma_filter_destroy(&(crtc_updates[filter_i].filter));
-	libcoopgamma_error_destroy(&(crtc_updates[filter_i].error));
-	free(crtc_updates[filter_i].slaves);
-      }
-  return rc;
-  
- custom_fail:
-  rc = 1;
-  goto done;
-  
- fail:
-  rc = 1;
-  if (errno)
-    perror(argv0);
-  goto done;
-  
- cg_fail:
-  rc = 1;
-  {
-    const char* side = cg.error.server_side ? "server" : "client";
-    if (cg.error.custom)
-      {
-	if ((cg.error.number != 0) && (cg.error.description != NULL))
-	  fprintf(stderr, "%s: %s-side error number %" PRIu64 ": %s\n",
-		  argv0, side, cg.error.number, cg.error.description);
-	else if (cg.error.number != 0)
-	  fprintf(stderr, "%s: %s-side error number %" PRIu64 "\n", argv0, side, cg.error.number);
-	else if (cg.error.description != NULL)
-	  fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description);
-      }
-    else if (cg.error.description != NULL)
-      fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description);
-    else
-      fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, strerror(cg.error.number));
-  }
-  goto done;
-}
-
diff --git a/src/cg-base.h b/src/cg-base.h
deleted file mode 100644
index cd885e7..0000000
--- a/src/cg-base.h
+++ /dev/null
@@ -1,254 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include <libcoopgamma.h>
-
-#include <inttypes.h>
-
-
-
-/**
- * Value of `default_priority` that indicates
- * that there is no default priority
- */
-#define NO_DEFAULT_PRIORITY  INT64_MAX
-
-
-
-/**
- * X-macro that list all gamma ramp types
- * 
- * X will be expanded with 4 arguments:
- * 1)  The libcoopgamma constant that identifies the type
- * 2)  The member in `union libcoopgamma_ramps` that
- *     corresponds to the type
- * 3)  The max value for the ramp stops
- * 4)  The type of the ramp stops
- */
-#define LIST_DEPTHS\
-  X(LIBCOOPGAMMA_UINT8,  u8,  UINT8_MAX,   uint8_t)\
-  X(LIBCOOPGAMMA_UINT16, u16, UINT16_MAX,  uint16_t)\
-  X(LIBCOOPGAMMA_UINT32, u32, UINT32_MAX,  uint32_t)\
-  X(LIBCOOPGAMMA_UINT64, u64, UINT64_MAX,  uint64_t)\
-  X(LIBCOOPGAMMA_FLOAT,  f,   ((float)1),  float)\
-  X(LIBCOOPGAMMA_DOUBLE, d,   ((double)1), double)
-
-
-
-/**
- * Information (except asynchronous call context)
- * required to update the gamma ramps on a CRTC.
- */
-typedef struct filter_update
-{
-  /**
-   * The filter to update
-   * 
-   * `.filter.crtc`, `.filter.class`, and
-   * `.filter.priority` (unless `default_priority`
-   * is `NO_DEFAULT_PRIORITY`), `.filter.depth`
-   * are preconfigured, and `.filter.ramps`
-   * is preinitialised and preset to an
-   * identity ramp
-   */
-  libcoopgamma_filter_t filter;
-  
-  /**
-   * The index of the CRTC
-   */
-  size_t crtc;
-  
-  /**
-   * Has the update been synchronised?
-   */
-  int synced;
-  
-  /**
-   * Did the update fail?
-   */
-  int failed;
-  
-  /**
-   * Error description if `.failed` is true
-   */
-  libcoopgamma_error_t error;
-  
-  /**
-   * If zero, the ramps in `.filter` shall
-   * neither be modified nor freed
-   */
-  int master;
-  
-  /**
-   * 0-terminated list of elements in
-   * `.crtc_updates` which shares gamma
-   * ramps with this instance
-   * 
-   * This will only be set if `.master`
-   * is true
-   */
-  size_t* slaves;
-  
-} filter_update_t;
-
-
-
-/**
- * The process's name
- */
-extern const char* argv0;
-
-/**
- * The libcoopgamma context
- */
-extern libcoopgamma_context_t cg;
-
-/**
- * The names of the selected CRTC:s
- */
-extern char** crtcs;
-
-/**
- * Gamma ramp updates for each CRTC
- */
-extern filter_update_t* crtc_updates;
-
-/**
- * CRTC and monitor information about
- * each selected CRTC and connect monitor
- */
-extern libcoopgamma_crtc_info_t* crtc_info;
-
-/**
- * The number of selected CRTC:s
- */
-extern size_t crtcs_n;
-
-/**
- * The number of filters
- */
-extern size_t filters_n;
-
-
-
-/**
- * The default filter priority for the program
- */
-extern const int64_t default_priority;
-
-/**
- * The default class for the program
- */
-extern char default_class[];
-
-/**
- * Class suffixes
- */
-extern const char* const* class_suffixes;
-
-
-
-/**
- * Make elements in `crtc_updates` slaves where appropriate
- * 
- * @return  Zero on success, -1 on error
- */
-int make_slaves(void);
-
-/**
- * Update a filter and synchronise calls
- * 
- * @param   index    The index of the CRTC
- * @param   timeout  The number of milliseconds a call to `poll` may block,
- *                   -1 if it may block forever
- * @return           1: Success, no pending synchronisations
- *                   0: Success, with still pending synchronisations
- *                   -1: Error, `errno` set
- *                   -2: Error, `cg.error` set
- * 
- * @throws  EINTR   Call to `poll` was interrupted by a signal
- * @throws  EAGAIN  Call to `poll` timed out
- */
-int update_filter(size_t index, int timeout);
-
-/**
- * Synchronised calls
- * 
- * @param   timeout  The number of milliseconds a call to `poll` may block,
- *                   -1 if it may block forever
- * @return           1: Success, no pending synchronisations
- *                   0: Success, with still pending synchronisations
- *                   -1: Error, `errno` set
- *                   -2: Error, `cg.error` set
- * 
- * @throws  EINTR   Call to `poll` was interrupted by a signal
- * @throws  EAGAIN  Call to `poll` timed out
- */
-int synchronise(int timeout);
-
-
-/**
- * Print usage information and exit
- */
-#if defined(__GNUC__)
-__attribute__((__noreturn__))
-#endif
-extern void usage(void);
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-#if defined(__GNUC__)
-__attribute__((__nonnull__(1)))
-#endif
-extern int handle_opt(char* opt, char* arg);
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-#if defined(__GNUC__)
-__attribute__((__nonnull__(2)))
-#endif
-extern int handle_args(int argc, char* argv[], char* prio);
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-extern int start(void);
-
diff --git a/src/cg-brilliance.c b/src/cg-brilliance.c
deleted file mode 100644
index 3541d03..0000000
--- a/src/cg-brilliance.c
+++ /dev/null
@@ -1,313 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = (int64_t)1 << 61;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-brilliance::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * The brilliance of the red channel
- */
-static double rvalue = 0;
-
-/**
- * The brilliance of the green channel
- */
-static double gvalue = 0;
-
-/**
- * The brilliance of the blue channel
- */
-static double bvalue = 0;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
-	  "(-x | [-p priority] [-d] (all | red green blue))\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      default:
-	usage();
-      }
-  else
-    usage();
-  return 0;
-  (void) arg;
-}
-
-
-/**
- * Parse a non-negative double encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_double(double* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  *out = strtod(str, &end);
-  if (errno || (*out < 0) || isinf(*out) || isnan(*out) || *end)
-    return -1;
-  if (!*str || !strchr("0123456789.", *str))
-    return -1;
-  return 0;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  char* red = NULL;
-  char* green = NULL;
-  char* blue = NULL;
-  int q = xflag + dflag;
-  if ((q > 1) || (xflag && (prio != NULL || argc)))
-    usage();
-  if (argc == 1)
-    red = green = blue = argv[0];
-  else if (argc == 3)
-    {
-      red   = argv[0];
-      green = argv[1];
-      blue  = argv[2];
-    }
-  else if (argc || !xflag)
-    usage();
-  if (argc)
-    {
-      if (parse_double(&rvalue, red) < 0)
-	usage();
-      if (parse_double(&gvalue, blue) < 0)
-	usage();
-      if (parse_double(&bvalue, green) < 0)
-	usage();
-    }
-  return 0;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter)
-{
-  size_t i;
-  switch (filter->depth)
-    {
-#define X(CONST, MAX, TYPE, MEMBER)							\
-    case CONST:										\
-      for (i = 0; i < filter->ramps.MEMBER.red_size; i++)				\
-	{										\
-	  double val = (double)(filter->ramps.MEMBER.red[i]);				\
-	  val *= rvalue;								\
-	  if      (val < 0)              filter->ramps.MEMBER.red[i] = 0;		\
-	  else if (val > (double)(MAX))  filter->ramps.MEMBER.red[i] = MAX;		\
-	  else                           filter->ramps.MEMBER.red[i] = (TYPE)val;	\
-	}										\
-      for (i = 0; i < filter->ramps.MEMBER.green_size; i++)				\
-	{										\
-	  double val = (double)(filter->ramps.MEMBER.green[i]);				\
-	  val *= gvalue;								\
-	  if      (val < 0)              filter->ramps.MEMBER.green[i] = 0;		\
-	  else if (val > (double)(MAX))  filter->ramps.MEMBER.green[i] = MAX;		\
-	  else                           filter->ramps.MEMBER.green[i] = (TYPE)val;	\
-	}										\
-      for (i = 0; i < filter->ramps.MEMBER.blue_size; i++)				\
-	{										\
-	  double val = (double)(filter->ramps.MEMBER.blue[i]);				\
-	  val *= bvalue;								\
-	  if      (val < 0)              filter->ramps.MEMBER.blue[i] = 0;		\
-	  else if (val > (double)(MAX))  filter->ramps.MEMBER.blue[i] = MAX;		\
-	  else                           filter->ramps.MEMBER.blue[i] = (TYPE)val;	\
-	}										\
-      break
-    X(LIBCOOPGAMMA_UINT8,  UINT8_MAX,  uint8_t,  u8);
-    X(LIBCOOPGAMMA_UINT16, UINT16_MAX, uint16_t, u16);
-    X(LIBCOOPGAMMA_UINT32, UINT32_MAX, uint32_t, u32);
-    X(LIBCOOPGAMMA_UINT64, UINT64_MAX, uint64_t, u64);
-#undef X
-    case LIBCOOPGAMMA_FLOAT:
-       libclut_rgb_brightness(&(filter->ramps.f), (float)1, float, rvalue, gvalue, bvalue);
-       libclut_clip(&(filter->ramps.f), (float)1, float, 1, 1, 1);
-      break;
-    case LIBCOOPGAMMA_DOUBLE:
-       libclut_rgb_brightness(&(filter->ramps.d), (double)1, double, rvalue, gvalue, bvalue);
-       libclut_clip(&(filter->ramps.d), (double)1, double, 1, 1, 1);
-      break;
-    default:
-      abort();
-    }
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag)
-    if ((r = make_slaves()) < 0)
-      return r;
-  
-  for (i = 0, r = 1; i < filters_n; i++)
-    {
-      if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	continue;
-      if (!xflag)
-	fill_filter(&(crtc_updates[i].filter));
-      r = update_filter(i, 0);
-      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	return r;
-      if (crtc_updates[i].slaves != NULL)
-	for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	  {
-	    r = update_filter(crtc_updates[i].slaves[j], 0);
-	    if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	      return r;
-	  }
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return r;
-  
-  if (!dflag)
-    return 0;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return -1;
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return -1;
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return -1;
-}
-
diff --git a/src/cg-darkroom.c b/src/cg-darkroom.c
deleted file mode 100644
index 9990aa3..0000000
--- a/src/cg-darkroom.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = (int64_t)3 << 61;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-darkroom::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * The brilliance of the red channel
- */
-static double value = 0.25;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
-	  "(-x | [-p priority] [-d] [brightness])\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      default:
-	usage();
-      }
-  else
-    usage();
-  return 0;
-  (void) arg;
-}
-
-
-/**
- * Parse a non-negative double encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_double(double* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  *out = strtod(str, &end);
-  if (errno || (*out < 0) || isinf(*out) || isnan(*out) || *end)
-    return -1;
-  if (!*str || !strchr("0123456789.", *str))
-    return -1;
-  return 0;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int q = xflag + dflag;
-  if ((q > 1) || (xflag && (prio != NULL || argc)))
-    usage();
-  if (argc == 1)
-    {
-      if (parse_double(&value, argv[0]) < 0)
-	usage();
-    }
-  else if (argc)
-    usage();
-  return 0;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param   filter  The filter to fill
- * @return          Zero on success, -1 on error
- */
-static int fill_filter(libcoopgamma_filter_t* restrict filter)
-{
-  union libcoopgamma_ramps dramps;
-  size_t size;
-  
-  if ((0 <= value) && (value <= 1))
-    {
-      switch (filter->depth)
-	{
-#define X(CONST, MEMBER, MAX, TYPE)\
-	case CONST:\
-	  libclut_negative(&(filter->ramps.MEMBER), MAX, TYPE, 1, 0, 0);\
-	  libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, 1, 0, 0);\
-	  libclut_cie_brightness(&(filter->ramps.MEMBER), MAX, TYPE, value, value, value);\
-	  break;
-LIST_DEPTHS
-#undef X
-	default:
-	  abort();
-	}
-      return 0;
-    }
-  if (filter->depth == LIBCOOPGAMMA_DOUBLE)
-    {
-      libclut_negative(&(filter->ramps.d), (double)1, double, 1, 0, 0);
-      libclut_rgb_brightness(&(filter->ramps.d), (double)1, double, 1, 0, 0);
-      libclut_cie_brightness(&(filter->ramps.d), (double)1, double, value, value, value);
-      libclut_clip(&(filter->ramps.d), (double)1, double, 1, 0, 0);
-      return 0;
-    }
-  if (filter->depth == LIBCOOPGAMMA_FLOAT)
-    {
-      libclut_negative(&(filter->ramps.f), (float)1, float, 1, 0, 0);
-      libclut_rgb_brightness(&(filter->ramps.f), (float)1, float, 1, 0, 0);
-      libclut_cie_brightness(&(filter->ramps.f), (float)1, float, value, value, value);
-      libclut_clip(&(filter->ramps.f), (float)1, float, 1, 0, 0);
-      return 0;
-    }  
-  
-  size  = dramps.d.red_size   = filter->ramps.d.red_size;
-  size += dramps.d.green_size = filter->ramps.d.green_size;
-  size += dramps.d.blue_size  = filter->ramps.d.blue_size;
-  dramps.d.red = calloc(size, sizeof(double));
-  if (dramps.d.red == NULL)
-    return -1;
-  dramps.d.green = dramps.d.red   + dramps.d.red_size;
-  dramps.d.blue  = dramps.d.green + dramps.d.green_size;
-  
-  libclut_start_over(&(dramps.d), (double)1, double, 1, 0, 0);
-  libclut_negative(&(dramps.d), (double)1, double, 1, 0, 0);
-  libclut_rgb_brightness(&(dramps.d), (double)1, double, 1, 0, 0);
-  libclut_cie_brightness(&(dramps.d), (double)1, double, value, value, value);
-  libclut_clip(&(dramps.d), (double)1, double, 1, 0, 0);
-  
-  switch (filter->depth)
-    {
-    case LIBCOOPGAMMA_UINT8:
-      libclut_translate(&(filter->ramps.u8), UINT8_MAX, uint8_t, &(dramps.d), (double)1, double);
-      break;
-    case LIBCOOPGAMMA_UINT16:
-      libclut_translate(&(filter->ramps.u16), UINT16_MAX, uint16_t, &(dramps.d), (double)1, double);
-      break;
-    case LIBCOOPGAMMA_UINT32:
-      libclut_translate(&(filter->ramps.u32), UINT32_MAX, uint32_t, &(dramps.d), (double)1, double);
-      break;
-    case LIBCOOPGAMMA_UINT64:
-      libclut_translate(&(filter->ramps.u64), UINT64_MAX, uint64_t, &(dramps.d), (double)1, double);
-      break;
-    default:
-      abort();
-    }
-  
-  free(dramps.d.red);
-  return 0;
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag)
-    if ((r = make_slaves()) < 0)
-      return r;
-  
-  for (i = 0, r = 1; i < filters_n; i++)
-    {
-      if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	continue;
-      if (!xflag)
-	if ((r = fill_filter(&(crtc_updates[i].filter))) < 0)
-	  return r;
-      r = update_filter(i, 0);
-      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	return r;
-      if (crtc_updates[i].slaves != NULL)
-	for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	  {
-	    r = update_filter(crtc_updates[i].slaves[j], 0);
-	    if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	      return r;
-	  }
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return r;
-  
-  if (!dflag)
-    return 0;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return -1;
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return -1;
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return -1;
-}
-
diff --git a/src/cg-gamma.c b/src/cg-gamma.c
deleted file mode 100644
index 1d24d07..0000000
--- a/src/cg-gamma.c
+++ /dev/null
@@ -1,541 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <sys/stat.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = 0;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-gamma::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * -f: gamma listing file
- */
-static char* fflag = NULL;
-
-/**
- * The gamma of the red channel
- */
-static double rgamma = 1;
-
-/**
- * The gamma of the green channel
- */
-static double ggamma = 1;
-
-/**
- * The gamma of the blue channel
- */
-static double bgamma = 1;
-
-/**
- * `NULL`-terminated list of output
- * names listed in the configuration file
- */
-static char** names = NULL;
-
-/**
- * The gamma of the red channel on monitor
- * with same index in `names`
- */
-static double* rgammas = NULL;
-
-/**
- * The gamma of the green channel on monitor
- * with same index in `names`
- */
-static double* ggammas = NULL;
-
-/**
- * The gamma of the blue channel on monitor
- * with same index in `names`
- */
-static double* bgammas = NULL;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
-	  "(-x | [-p priority] [-d] [-f file | all | red green blue])\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Perform cleanup so valgrind output is clean
- * 
- * @param   ret  The value to return
- * @return       `ret` is returned as is
- */
-static int cleanup(int ret)
-{
-  int saved_errno = errno;
-  if (names != NULL)
-    {
-      char** p = names;
-      while (*p)
-	free(*p++);
-    }
-  free(names);
-  free(rgammas);
-  free(ggammas);
-  free(bgammas);
-  errno = saved_errno;
-  return ret;
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      case 'f':
-	if (fflag || !(fflag = arg))
-	  usage();
-	return 1;
-      default:
-	usage();
-      }
-  return 0;
-}
-
-
-/**
- * Get the pathname of a configuration file
- * 
- * @param   confname   The filename (excluding directory) of the configuration file
- * @return             The full pathname of the configuration file, `NULL` on error
- */
-static char* get_conf_file(const char* restrict confname)
-{
-  struct passwd* pw;
-  char* path;
-  
-  pw = getpwuid(getuid());
-  if ((pw == NULL) || (pw->pw_dir == NULL))
-    return NULL;
-  
-  path = malloc(strlen(pw->pw_dir) + strlen(confname) + sizeof("/.config/"));
-  if (path == NULL)
-    return NULL;
-  
-  sprintf(path, "%s/.config/%s", pw->pw_dir, confname);
-  
-  if (access(path, F_OK) < 0)
-    sprintf(path, "/etc/%s", confname);
-  
-  return path;
-}
-
-
-/**
- * Parse a non-negative double encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_double(double* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  *out = strtod(str, &end);
-  if (errno || (*out < 0) || isinf(*out) || isnan(*out) || *end)
-    return -1;
-  if (!*str || !strchr("0123456789.", *str))
-    return -1;
-  return 0;
-}
-
-
-/**
- * Parse gamma configuration file
- * 
- * @param   pathname  The pathname of the file
- * @return            Zero on success, -1 on error
- */
-static int parse_gamma_file(const char* restrict pathname)
-{
-  int fd, saved_errno;
-  char* line = NULL;
-  size_t size = 0, lineno = 0, ptr = 0, alloc = 0;
-  ssize_t n;
-  FILE* f = NULL;
-  char* p;
-  char* q;
-  char* r;
-  char* g;
-  char* b;
-  
-  fd = open(pathname, O_RDONLY);
-  if (fd == -1)
-    return -1;
-  
-  f = fdopen(fd, "rb");
-  if (f == NULL)
-    goto fail;
-  
-  while (n = getline(&line, &size, f), n >= 0)
-    {
-      lineno += 1;
-      
-      if ((n > 0) && (line[n - 1] == '\n'))
-	line[n - 1] = '\0';
-      p = line;
-      while ((*p == ' ') || (*p == '\t')) p++;
-      if ((!*p) || (*p == '#'))
-	continue;
-      
-      r = strpbrk(line, " \t");
-      if (r == NULL)
-	goto bad;
-      while (r[1] == ' ' || r[1] == '\t') r++;
-      g = strpbrk(r + 1, " \t");
-      if (g == NULL)
-	goto bad;
-      while (g[1] == ' ' || g[1] == '\t') g++;
-      b = strpbrk(g + 1, " \t");
-      if (b == NULL)
-	goto bad;
-      while (b[1] == ' ' || b[1] == '\t') b++;
-      
-      for (;;)
-	{
-	  q = strpbrk(b + 1, " \t");
-	  if (q == NULL)
-	    break;
-	  while (q[1] == ' ' || q[1] == '\t') q++;
-	  if (!*q)
-	    break;
-	  r = g, g = b, b = q;
-	}
-      
-      *r++ = '\0';
-      *g++ = '\0';
-      *b++ = '\0';
-      
-      q = strpbrk(r, " \t");
-      if (q != NULL)
-	*q = '\0';
-      q = strpbrk(g, " \t");
-      if (q != NULL)
-	*q = '\0';
-      q = strpbrk(b, " \t");
-      if (q != NULL)
-	*q = '\0';
-      
-      q = strchr(p, '\0');
-      while ((q != p) && ((q[-1] == ' ') || (q[-1] == '\t')))
-	q--;
-      *q = '\0';
-      
-      if (ptr == alloc)
-	{
-	  void* new;
-	  size_t new_size = alloc ? (alloc << 1) : 4;
-	  
-	  new = realloc(rgammas, new_size * sizeof(*rgammas));
-	  if (new == NULL)
-	    goto fail;
-	  rgammas = new;
-	  
-	  new = realloc(ggammas, new_size * sizeof(*ggammas));
-	  if (new == NULL)
-	    goto fail;
-	  ggammas = new;
-	  
-	  new = realloc(bgammas, new_size * sizeof(*bgammas));
-	  if (new == NULL)
-	    goto fail;
-	  bgammas = new;
-	  
-	  new = realloc(names, (new_size + 1) * sizeof(*names));
-	  if (new == NULL)
-	    goto fail;
-	  names = new;
-	  memset(names + alloc, 0, (new_size + 1 - alloc) * sizeof(*names));
-	  
-	  alloc = new_size;
-	}
-      
-      if ((parse_double(rgammas + ptr, r) < 0) ||
-	  (parse_double(ggammas + ptr, g) < 0) ||
-	  (parse_double(bgammas + ptr, b) < 0))
-	goto bad;
-      names[ptr] = malloc(strlen(p) + 1);
-      if (names[ptr] == NULL)
-	goto fail;
-      strcpy(names[ptr], p);
-      ptr++;
-      
-      continue;
-    bad:
-      fprintf(stderr, "%s: ignoring malformatted line in %s: %zu\n", argv0, pathname, lineno);
-    }
-  
-  if (fclose(f) < 0)
-    {
-      f = NULL;
-      goto fail;
-    }
-  close(fd);
-  free(line);
-  return 0;
- fail:
-  saved_errno = errno;
-  free(line);
-  if (f != NULL)
-    fclose(f);
-  if (fd >= 0)
-    close(fd);
-  errno = saved_errno;
-  return -1;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int free_fflag = 0, saved_errno;
-  int q = xflag + dflag;
-  if ((q > 1) || (fflag && argc) || (xflag && ((fflag != NULL) || (argc > 0) || (prio != NULL))))
-    usage();
-  if (argc == 1)
-    {
-      if (parse_double(&rgamma, argv[0]) < 0)
-	usage();
-      bgamma = ggamma = rgamma;
-    }
-  else if (argc == 3)
-    {
-      if (parse_double(&rgamma, argv[0]) < 0)
-	usage();
-      if (parse_double(&ggamma, argv[1]) < 0)
-	usage();
-      if (parse_double(&bgamma, argv[2]) < 0)
-	usage();
-    }
-  else if (argc)
-    usage();
-  if (!argc && !fflag && !xflag)
-    {
-      fflag = get_conf_file("gamma");
-      if (fflag == NULL)
-	return -1;
-      free_fflag = 1;
-    }
-  if (fflag)
-    if (parse_gamma_file(fflag) < 0)
-      goto fail;
-  if (free_fflag)
-    free(fflag), fflag = NULL;
-  return 0;
- fail:
-  saved_errno = errno;
-  if (free_fflag)
-    free(fflag), fflag = NULL;
-  errno = saved_errno;
-  return cleanup(-1);
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- * @param  r       The red gamma
- * @param  g       The green gamma
- * @param  b       The blue gamma
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter, double r, double g, double b)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-      libclut_gamma(&(filter->ramps.MEMBER), MAX, TYPE, r, g, b);\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag && (names != NULL))
-    if ((r = make_slaves()) < 0)
-      return cleanup(r);
-  
-  if (names == NULL)
-    for (i = 0, r = 1; i < filters_n; i++)
-      {
-	if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	  continue;
-	if (!xflag)
-	  fill_filter(&(crtc_updates[i].filter), rgamma, ggamma, bgamma);
-	r = update_filter(i, 0);
-	if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	  return cleanup(r);
-	if (crtc_updates[i].slaves != NULL)
-	  for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	    {
-	      r = update_filter(crtc_updates[i].slaves[j], 0);
-	      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		return cleanup(r);
-	    }
-      }
-  else
-    for (i = 0, r = 1; i < filters_n; i++)
-      {
-	if (!(crtc_info[crtc_updates[i].crtc].supported))
-	  continue;
-	for (j = 0; names[j] != NULL; j++)
-	  if (!strcasecmp(crtc_updates[i].filter.crtc, names[j]))
-	    {
-	      fill_filter(&(crtc_updates[i].filter), rgammas[j], ggammas[j], bgammas[j]);
-	      r = update_filter(i, 0);
-	      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		return cleanup(r);
-	      break;
-	    }
-      }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return cleanup(r);
-  
-  if (!dflag)
-    return cleanup(0);
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return cleanup(-1);
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return cleanup(-1);
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return cleanup(-1);
-}
-
diff --git a/src/cg-icc.c b/src/cg-icc.c
deleted file mode 100644
index 5970930..0000000
--- a/src/cg-icc.c
+++ /dev/null
@@ -1,945 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <sys/stat.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/* Note, that EDID:s are 256 hexadecimals long, and
- * a filename can only be 255 characters long. */
-
-
-
-/**
- * Magic number for dual-byte precision lookup table based profiles
- */
-#define MLUT_TAG  0x6D4C5554L
-
-/**
- * Magic number for gamma–brightness–contrast based profiles
- * and for variable precision lookup table profiles
- */
-#define VCGT_TAG  0x76636774L
-
-/**
- * The filename of the configuration file
- */
-#define ICCTAB  "icctab"
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = 0;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-icc::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * The panhame of the selected ICC profile
- */
-static const char* icc_pathname = NULL;
-
-/**
- * Gamma ramps loaded from `icc_pathname`
- */
-static libcoopgamma_ramps_t uniramps;
-
-/**
- * The datatype of the stops in the ramps of `uniramps`
- */
-static libcoopgamma_depth_t unidepth = 0;
-
-/**
- * Parsed ICC profiles for each CRTC
- */
-static libcoopgamma_ramps_t* rampses = NULL;
-
-/**
- * The datatype of the stops in the ramps of
- * corresponding element in `rampses`
- */
-static libcoopgamma_depth_t* depths = NULL;
-
-/**
- * File descriptor for configuration directory
- */
-static int confdirfd = -1;
-
-/**
- * List of CRTC:s
- */
-static char** crtc_icc_keys = NULL;
-
-/**
- * List of ICC profile pathnames for corresponding
- * CRTC in `crtc_icc_keys`
- */
-static char** crtc_icc_values = NULL;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
-	  "(-x | [-p priority] [-d] [file])\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Perform cleanup so valgrind output is clean
- * 
- * @param   ret  The value to return
- * @return       `ret` is returned as is
- */
-static int cleanup(int ret)
-{
-  int saved_errno = errno;
-  size_t i;
-  libcoopgamma_ramps_destroy(&uniramps);
-  if (confdirfd >= 0)
-    close(confdirfd);
-  if (rampses != NULL)
-    for (i = 0; i < crtcs_n; i++)
-      libcoopgamma_ramps_destroy(rampses + i);
-  free(rampses);
-  free(depths);
-  if (crtc_icc_keys != NULL)
-    for (i = 0; crtc_icc_keys[i] != NULL; i++)
-      free(crtc_icc_keys[i]);
-  free(crtc_icc_keys);
-  if (crtc_icc_values != NULL)
-    for (i = 0; crtc_icc_values[i] != NULL; i++)
-      free(crtc_icc_values[i]);
-  free(crtc_icc_values);
-  errno = saved_errno;
-  return ret;
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      default:
-	usage();
-      }
-  return 0;
-  (void) arg;
-}
-
-
-/**
- * Populate `crtc_icc_keys` and `crtc_icc_value`
- * 
- * @path    fd       File descriptor for the ICC profile table
- * @path    dirname  The dirname of the ICC profile table
- * @return           Zero on success, -1 on error
- */
-static int load_icc_table(int fd, const char *dirname)
-{
-  FILE *fp;
-  ssize_t len;
-  size_t lineno = 1, size = 0;
-  char *p, *q, *line = NULL;
-  int saved_errno;
-  size_t ptr = 0, siz = 0;
-  void *new;
-  size_t dirname_len = strlen(dirname);
-  fp = fdopen(fd, "rb");
-  if (fp == NULL)
-    return -1;
-  for (; len = getline(&line, &size, fp), len >= 0; lineno++)
-    {
-      if (len && line[len - 1] == '\n')
-	line[--len] = '\0';
-      p = line + strspn(line, " \t");
-      if (!*p || (*p == '#'))
-	continue;
-      q = p + strspn(p, "0123456789abcdefABCDEF");
-      if ((*q != ' ' && *q != '\t'))
-	{
-	  fprintf(stderr, "%s: warning: line %zu is malformated in %s/%s\n",
-		  argv0, lineno, dirname, ICCTAB);
-	  continue;
-	}
-      *q = '\0';
-      if ((size_t)(q - p) != 256)
-	fprintf(stderr, "%s: warning: EDID on line %zu in %s/%s looks to be of wrong length: %s\n",
-		argv0, lineno, dirname, ICCTAB, p);
-      q++;
-      q += strspn(p, " \t");
-      if (!*q)
-	{
-	  fprintf(stderr, "%s: warning: line %zu is malformated in %s/%s\n",
-		  argv0, lineno, dirname, ICCTAB);
-	  continue;
-	}
-      if (strchr(" \t", strchr(q, '\0')[-1]))
-	fprintf(stderr, "%s: warning: filename on line %zu in %s/%s ends with white space: %s\n",
-		argv0, lineno, dirname, ICCTAB, q);
-      if (ptr == siz)
-	{
-	  new = realloc(crtc_icc_keys, (siz + 5) * sizeof(*crtc_icc_keys));
-	  if (new == NULL)
-	    goto fail;
-	  crtc_icc_keys = new;
-	  new = realloc(crtc_icc_values, (siz + 5) * sizeof(*crtc_icc_values));
-	  if (new == NULL)
-	    goto fail;
-	  crtc_icc_values = new;
-	  siz += 4;
-	}
-      crtc_icc_values[ptr] = malloc((*q == '/' ? 1 : dirname_len + sizeof("/")) + strlen(q));
-      if (crtc_icc_values[ptr] == NULL)
-	goto fail;
-      if (*q == '/')
-	strcpy(crtc_icc_values[ptr], q);
-      else
-	stpcpy(stpcpy(stpcpy(crtc_icc_values[ptr], dirname), "/"), q);
-      crtc_icc_keys[ptr] = malloc(strlen(p) + 1);
-      if (crtc_icc_keys[ptr] == NULL)
-	{
-	  ptr++;
-	  goto fail;
-	}
-      strcpy(crtc_icc_keys[ptr], p);
-      ptr++;
-    }
-  if (ferror(fp))
-    goto fail;
-  if (crtc_icc_keys != NULL)
-    crtc_icc_keys[ptr] = NULL;
-  if (crtc_icc_values != NULL)
-    crtc_icc_values[ptr] = NULL;
-  fclose(fp);
-  free(line);
-  return 0;
- fail:
-  saved_errno = errno;
-  if (crtc_icc_keys != NULL)
-    crtc_icc_keys[ptr] = NULL;
-  if (crtc_icc_values != NULL)
-    crtc_icc_values[ptr] = NULL;
-  fclose(fp);
-  free(line);
-  errno = saved_errno;
-  return -1;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  struct passwd* pw;
-  char* path = NULL;
-  int saved_errno;
-  int fd = -1, q = xflag + dflag;
-  if ((q > 1) || (xflag && ((argc > 0) || (prio != NULL))) || (argc > 1))
-    usage();
-  icc_pathname = *argv;
-  memset(&uniramps, 0, sizeof(uniramps));
-  if (!xflag && (icc_pathname == NULL))
-    {
-      pw = getpwuid(getuid());
-      if ((pw == NULL) || (pw->pw_dir == NULL))
-	goto fail;
-      
-      path = malloc(strlen(pw->pw_dir) + sizeof("/.config"));
-      if (path == NULL)
-	goto fail;
-      
-      sprintf(path, "%s/.config", pw->pw_dir);
-      
-      if (access(path, F_OK) < 0)
-	sprintf(path, "/etc");
-      
-      confdirfd = open(path, O_DIRECTORY);
-      if (confdirfd < 0)
-	goto fail;
-      
-      fd = openat(confdirfd, ICCTAB, O_RDONLY);
-      if (fd < 0)
-	goto fail;
-      
-      if (load_icc_table(fd, path) < 0)
-	goto fail;
-      
-      free(path), path = NULL;
-      close(fd), fd = -1;
-    }
-  return 0;
- fail:
-  saved_errno = errno;
-  free(path), path = NULL;
-  if (fd >= 0)
-    close(fd);
-  errno = saved_errno;
-  return cleanup(-1);
-}
-
-
-/**
- * Read an unsigned 64-bit integer
- * 
- * @param   content  The beginning of the encoded integer
- * @return           The integer, decoded
- */
-static uint64_t icc_uint64(const char* restrict content)
-{
-  uint64_t rc;
-  rc  = (uint64_t)(unsigned char)(content[0]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[1]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[2]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[3]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[4]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[5]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[6]), rc <<= 8;
-  rc |= (uint64_t)(unsigned char)(content[7]);
-  return rc;
-}
-
-
-/**
- * Read an unsigned 32-bit integer
- * 
- * @param   content  The beginning of the encoded integer
- * @return           The integer, decoded
- */
-static uint32_t icc_uint32(const char* restrict content)
-{
-  uint32_t rc;
-  rc  = (uint32_t)(unsigned char)(content[0]), rc <<= 8;
-  rc |= (uint32_t)(unsigned char)(content[1]), rc <<= 8;
-  rc |= (uint32_t)(unsigned char)(content[2]), rc <<= 8;
-  rc |= (uint32_t)(unsigned char)(content[3]);
-  return rc;
-}
-
-
-/**
- * Read an unsigned 16-bit integer
- * 
- * @param   content  The beginning of the encoded integer
- * @return           The integer, decoded
- */
-static uint16_t icc_uint16(const char* restrict content)
-{
-  uint16_t rc;
-  rc  = (uint16_t)(unsigned char)(content[0]), rc <<= 8;
-  rc |= (uint16_t)(unsigned char)(content[1]);
-  return rc;
-}
-
-
-/**
- * Read an unsigned 8-bit integer
- * 
- * @param   content  The beginning of the encoded integer
- * @return           The integer, decoded
- */
-static uint16_t icc_uint8(const char* restrict content)
-{
-  return (uint8_t)(content[0]);
-}
-
-
-/**
- * Read a floating-point value
- * 
- * @param   content  The beginning of the encoded value
- * @param   width    The number of bytes with which the value is encoded
- * @return           The value, decoded
- */
-static double icc_double(const char* restrict content, size_t width)
-{
-  double ret = 0;
-  size_t i;
-  for (i = 0; i < width; i++)
-    {
-      ret /= 256;
-      ret += (double)(unsigned char)(content[width - 1 - i]);
-    }
-  ret /= 255;
-  return ret;
-}
-
-
-/**
- * Parse an ICC profile
- * 
- * @param   content  The content of the ICC profile file
- * @param   n        The byte-size of `content`
- * @param   ramps    Output parameter for the filter stored in the ICC profile,
- *                   `.red_size`, `.green_size`, `.blue_size` should already be
- *                   set (these values can however be modified.)
- * @param   depth    Output parameter for ramps stop value type
- * @return           Zero on success, -1 on error, -2 if no usable data is
- *                   available in the profile.
- */
-static int parse_icc(const char* restrict content, size_t n, libcoopgamma_ramps_t* ramps,
-		     libcoopgamma_depth_t* depth)
-{
-  uint32_t i_tag, n_tags;
-  size_t i, ptr = 0, xptr;
-  
-  /* Skip header */
-  if (n - ptr < 128)
-    return -2;
-  ptr += 128;
-  
-  /* Get the number of tags */
-  if (n - ptr < 4)
-    return -2;
-  n_tags = icc_uint32(content + ptr), ptr += 4;
-  
-  for (i_tag = 0, xptr = ptr; i_tag < n_tags; i_tag++, ptr = xptr)
-    {
-      uint32_t tag_name, tag_offset, tag_size, gamma_type;
-      
-      /* Get profile encoding type, offset to the profile and the encoding size of its data */
-      if (n - ptr < 12)
-	return -2;
-      tag_name   = icc_uint32(content + ptr), ptr += 4;
-      tag_offset = icc_uint32(content + ptr), ptr += 4;
-      tag_size   = icc_uint32(content + ptr), ptr += 4;
-      xptr = ptr;
-      
-      /* Jump to the profile data */
-      if (tag_offset > INT32_MAX - tag_size)
-	return -2;
-      if (tag_offset + tag_size > n)
-	return -2;
-      ptr = tag_offset;
-      
-      if (tag_name == MLUT_TAG)
-	{
-	  /* The profile is encododed as an dual-byte precision lookup table */
-	  
-	  /* Initialise ramps */
-	  *depth = LIBCOOPGAMMA_UINT16;
-	  ramps->u16.red_size   = 256;
-	  ramps->u16.green_size = 256;
-	  ramps->u16.blue_size  = 256;
-	  if (libcoopgamma_ramps_initialise(&(ramps->u16)) < 0)
-	    return -1;
-	  
-	  /* Get the lookup table */
-	  if (n - ptr < 3 * 256 * 2)
-	    continue;
-	  for (i = 0; i < 256; i++)
-	    ramps->u16.red[i]   = icc_uint16(content + ptr), ptr += 2;
-	  for (i = 0; i < 256; i++)
-	    ramps->u16.green[i] = icc_uint16(content + ptr), ptr += 2;
-	  for (i = 0; i < 256; i++)
-	    ramps->u16.blue[i]  = icc_uint16(content + ptr), ptr += 2;
-	  
-	  return 0;
-	}
-      else if (tag_name == VCGT_TAG)
-	{
-	  /* The profile is encoded as with gamma, brightness and contrast values
-	   * or as a variable precision lookup table profile */
-	  
-	  /* VCGT profiles starts where their magic number */
-	  if (n - ptr < 4)
-	    continue;
-	  tag_name = icc_uint32(content + ptr), ptr += 4;
-	  if (tag_name != VCGT_TAG)
-	    continue;
-	  
-	  /* Skip four bytes */
-	  if (n - ptr < 4)
-	    continue;
-	  ptr += 4;
-	  
-	  /* Get the actual encoding type */
-	  if (n - ptr < 4)
-	    continue;
-	  gamma_type = icc_uint32(content + ptr), ptr += 4;
-	  
-	  if (gamma_type == 0)
-	    {
-	      /* The profile is encoded as a variable precision lookup table */
-	      uint16_t n_channels, n_entries, entry_size;
-	      
-	      /* Get metadata */
-	      if (n - ptr < 3 * 4)
-		continue;
-	      n_channels = icc_uint16(content + ptr), ptr += 2;
-	      n_entries  = icc_uint16(content + ptr), ptr += 2;
-	      entry_size = icc_uint16(content + ptr), ptr += 2;
-	      if (tag_size == 1584)
-		n_channels = 3, n_entries = 256, entry_size = 2;
-	      if (n_channels != 3)
-		/* Assuming sRGB, can only be an correct assumption if there are exactly three channels */
-		continue;
-	      
-	      /* Check data availability */
-	      if (n_channels > SIZE_MAX / n_entries)
-		continue;
-	      if (entry_size > SIZE_MAX / (n_entries * n_channels))
-		continue;
-	      if (n - ptr < (size_t)n_channels * (size_t)n_entries * (size_t)entry_size)
-		continue;
-	      
-	      /* Initialise ramps */
-	      ramps->u8.red_size   = (size_t)n_entries;
-	      ramps->u8.green_size = (size_t)n_entries;
-	      ramps->u8.blue_size  = (size_t)n_entries;
-	      switch (entry_size)
-		{
-		case 1:
-		  *depth = LIBCOOPGAMMA_UINT8;
-		  if (libcoopgamma_ramps_initialise(&(ramps->u8)) < 0)
-		    return -1;
-		  break;
-		case 2:
-		  *depth = LIBCOOPGAMMA_UINT16;
-		  if (libcoopgamma_ramps_initialise(&(ramps->u16)) < 0)
-		    return -1;
-		  break;
-		case 4:
-		  *depth = LIBCOOPGAMMA_UINT32;
-		  if (libcoopgamma_ramps_initialise(&(ramps->u32)) < 0)
-		    return -1;
-		  break;
-		case 8:
-		  *depth = LIBCOOPGAMMA_UINT64;
-		  if (libcoopgamma_ramps_initialise(&(ramps->u64)) < 0)
-		    return -1;
-		  break;
-		default:
-		  *depth = LIBCOOPGAMMA_DOUBLE;
-		  if (libcoopgamma_ramps_initialise(&(ramps->d)) < 0)
-		    return -1;
-		  break;
-		}
-	      
-	      /* Get the lookup table */
-	      switch (*depth)
-		{
-		case LIBCOOPGAMMA_UINT8:
-		  for (i = 0; i < ramps->u8.red_size;   i++)
-		    ramps->u8.red[i]   = icc_uint8(content + ptr), ptr += 1;
-		  for (i = 0; i < ramps->u8.green_size; i++)
-		    ramps->u8.green[i] = icc_uint8(content + ptr), ptr += 1;
-		  for (i = 0; i < ramps->u8.blue_size;  i++)
-		    ramps->u8.blue[i]  = icc_uint8(content + ptr), ptr += 1;
-		  break;
-		case LIBCOOPGAMMA_UINT16:
-		  for (i = 0; i < ramps->u16.red_size;   i++)
-		    ramps->u16.red[i]   = icc_uint16(content + ptr), ptr += 2;
-		  for (i = 0; i < ramps->u16.green_size; i++)
-		    ramps->u16.green[i] = icc_uint16(content + ptr), ptr += 2;
-		  for (i = 0; i < ramps->u16.blue_size;  i++)
-		    ramps->u16.blue[i]  = icc_uint16(content + ptr), ptr += 2;
-		  break;
-		case LIBCOOPGAMMA_UINT32:
-		  for (i = 0; i < ramps->u32.red_size;   i++)
-		    ramps->u32.red[i]   = icc_uint32(content + ptr), ptr += 4;
-		  for (i = 0; i < ramps->u32.green_size; i++)
-		    ramps->u32.green[i] = icc_uint32(content + ptr), ptr += 4;
-		  for (i = 0; i < ramps->u32.blue_size;  i++)
-		    ramps->u32.blue[i]  = icc_uint32(content + ptr), ptr += 4;
-		  break;
-		case LIBCOOPGAMMA_UINT64:
-		  for (i = 0; i < ramps->u64.red_size;   i++)
-		    ramps->u64.red[i]   = icc_uint64(content + ptr), ptr += 8;
-		  for (i = 0; i < ramps->u64.green_size; i++)
-		    ramps->u64.green[i] = icc_uint64(content + ptr), ptr += 8;
-		  for (i = 0; i < ramps->u64.blue_size;  i++)
-		    ramps->u64.blue[i]  = icc_uint64(content + ptr), ptr += 8;
-		  break;
-		default:
-		  for (i = 0; i < ramps->d.red_size;   i++)
-		    ramps->d.red[i]   = icc_double(content + ptr, entry_size), ptr += entry_size;
-		  for (i = 0; i < ramps->d.green_size; i++)
-		    ramps->d.green[i] = icc_double(content + ptr, entry_size), ptr += entry_size;
-		  for (i = 0; i < ramps->d.blue_size;  i++)
-		    ramps->d.blue[i]  = icc_double(content + ptr, entry_size), ptr += entry_size;
-		  break;
-		}
-	      
-	      return 0;
-	    }
-	  else if (gamma_type == 1)
-	    {
-	      /* The profile is encoded with gamma, brightness and contrast values */
-	      double r_gamma, r_min, r_max, g_gamma, g_min, g_max, b_gamma, b_min, b_max;
-	      
-	      /* Get the gamma, brightness and contrast */
-	      if (n - ptr < 9 * 4)
-		continue;
-	      r_gamma = icc_uint32(content + ptr), r_gamma /= 65536L, ptr += 4;
-	      r_min   = icc_uint32(content + ptr), r_min   /= 65536L, ptr += 4;
-	      r_max   = icc_uint32(content + ptr), r_max   /= 65536L, ptr += 4;
-	      g_gamma = icc_uint32(content + ptr), g_gamma /= 65536L, ptr += 4;
-	      g_min   = icc_uint32(content + ptr), g_min   /= 65536L, ptr += 4;
-	      g_max   = icc_uint32(content + ptr), g_max   /= 65536L, ptr += 4;
-	      b_gamma = icc_uint32(content + ptr), b_gamma /= 65536L, ptr += 4;
-	      b_min   = icc_uint32(content + ptr), b_min   /= 65536L, ptr += 4;
-	      b_max   = icc_uint32(content + ptr), b_max   /= 65536L, ptr += 4;
-	      
-	      /* Initialise ramps */
-	      *depth = LIBCOOPGAMMA_DOUBLE;
-	      if (libcoopgamma_ramps_initialise(&(ramps->d)) < 0)
-		return -1;
-	      
-	      /* Set ramps */
-	      libclut_start_over(&(ramps->d), (double)1, double, 1, 1, 1);
-	      libclut_gamma(&(ramps->d), (double)1, double, r_gamma, g_gamma, b_gamma);
-	      libclut_rgb_limits(&(ramps->d), (double)1, double, r_min, r_max, g_min, g_max, b_min, b_max);
-	      
-	      return 0;
-	    }
-	}
-    }
-  
-  return -2;
-}
-
-
-/**
- * Load an ICC profile
- * 
- * @param   file   The ICC-profile file
- * @param   ramps  Output parameter for the filter stored in the ICC profile,
- *                 `.red_size`, `.green_size`, `.blue_size` should already be
- *                 set (these values can however be modified.)
- * @param   depth  Output parameter for ramps stop value type
- * @return         Zero on success, -1 on error, -2 if no usable data is
- *                 available in the profile.
- */
-static int load_icc(const char* file, libcoopgamma_ramps_t* ramps, libcoopgamma_depth_t* depth)
-{
-  char* content = NULL;
-  size_t ptr = 0, size = 0;
-  ssize_t got;
-  int fd = -1, r = -1, saved_errno;
-  
-  fd = open(file, O_RDONLY);
-  if (fd < 0)
-    {
-      if (errno == ENOENT)
-	{
-	  fprintf(stderr, "%s: %s: %s\n", argv0, strerror(ENOENT), file);
-	  errno = 0;
-	}
-      goto fail;
-    }
-  
-  for (;;)
-    {
-      if (ptr == size)
-	{
-	  size_t new_size = size ? (size << 1) : 4098;
-	  void* new = realloc(content, new_size);
-	  if (new == NULL)
-	    goto fail;
-	  content = new;
-	  size = new_size;
-	}
-      got = read(fd, content + ptr, size - ptr);
-      if (got < 0)
-	{
-	  if (errno == EINTR)
-	    continue;
-	  goto fail;
-	}
-      if (got == 0)
-	break;
-      ptr += (size_t)got;
-    }
-  
-  close(fd), fd = -1;
-  
-  r = parse_icc(content, ptr, ramps, depth);
- fail:
-  saved_errno = errno;
-  if (fd >= 0)
-    close(fd);
-  free(content);
-  errno = saved_errno;
-  return r;
-}
-
-
-/**
- * Get the pathname of the ICC profile for a CRTC
- * 
- * @param   crtc  The CRTC name
- * @return        The ICC profile file
- */
-static const char* get_icc(const char* crtc)
-{
-  size_t i;
-  if (crtc_icc_keys != NULL)
-    for (i = 0; crtc_icc_keys[i] != NULL; i++)
-      if (!strcasecmp(crtc, crtc_icc_keys[i]))
-	return crtc_icc_values[i];
-  return NULL;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- * @param  ramps   The prototype filter
- * @param  depth   The prototype filter's stop datatype
- */
-static void fill_filter(libcoopgamma_filter_t* filter, const libcoopgamma_ramps_t* ramps,
-			libcoopgamma_depth_t depth)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-      switch (depth)\
-	{\
-	case LIBCOOPGAMMA_UINT8:\
-	  libclut_translate(&(filter->ramps.MEMBER), MAX, TYPE, &(ramps->u8), UINT8_MAX, uint8_t);\
-	  break;\
-	case LIBCOOPGAMMA_UINT16:\
-	  libclut_translate(&(filter->ramps.MEMBER), MAX, TYPE, &(ramps->u16), UINT16_MAX, uint16_t);\
-	  break;\
-	case LIBCOOPGAMMA_UINT32:\
-	  libclut_translate(&(filter->ramps.MEMBER), MAX, TYPE, &(ramps->u32), UINT32_MAX, uint32_t);\
-	  break;\
-	case LIBCOOPGAMMA_UINT64:\
-	  libclut_translate(&(filter->ramps.MEMBER), MAX, TYPE, &(ramps->u64), UINT64_MAX, uint64_t);\
-	  break;\
-	case LIBCOOPGAMMA_FLOAT:\
-	  libclut_translate(&(filter->ramps.MEMBER), MAX, TYPE, &(ramps->f), (float)1, float);\
-	  break;\
-	case LIBCOOPGAMMA_DOUBLE:\
-	  libclut_translate(&(filter->ramps.MEMBER), MAX, TYPE, &(ramps->d), (double)1, double);\
-	  break;\
-	}\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  const char* path;
-  
-  if (xflag)
-    for (i = 0; i < crtcs_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < crtcs_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < crtcs_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag && (icc_pathname == NULL))
-    if ((r = make_slaves()) < 0)
-      return cleanup(r);
-  
-  if (icc_pathname != NULL)
-    {
-      uniramps.u8.red_size = uniramps.u8.green_size = uniramps.u8.blue_size = 1;
-      for (i = 0; i < crtcs_n; i++)
-	{
-	  if (uniramps.u8.red_size   < crtc_updates[i].filter.ramps.u8.red_size)
-	    uniramps.  u8.red_size   = crtc_updates[i].filter.ramps.u8.red_size;
-	  if (uniramps.u8.green_size < crtc_updates[i].filter.ramps.u8.green_size)
-	    uniramps.  u8.green_size = crtc_updates[i].filter.ramps.u8.green_size;
-	  if (uniramps.u8.blue_size  < crtc_updates[i].filter.ramps.u8.blue_size)
-	    uniramps.  u8.blue_size  = crtc_updates[i].filter.ramps.u8.blue_size;
-	}
-      switch (load_icc(icc_pathname, &uniramps, &unidepth))
-	{
-	case 0:
-	  break;
-	case -1:
-	  return cleanup(-1);
-	case -2:
-	  fprintf(stderr, "%s: unusable ICC profile: %s\n", argv0, icc_pathname);
-	  return cleanup(-3);
-	}
-    }
-  else
-    {
-      rampses = calloc(crtcs_n, sizeof(*rampses));
-      if (rampses == NULL)
-	return cleanup(-1);
-      depths = malloc(crtcs_n * sizeof(*depths));
-      if (depths == NULL)
-	return cleanup(-1);
-      for (i = 0; i < crtcs_n; i++)
-	{
-	  rampses[i].u8.red_size   = crtc_updates[i].filter.ramps.u8.red_size;
-	  rampses[i].u8.green_size = crtc_updates[i].filter.ramps.u8.green_size;
-	  rampses[i].u8.blue_size  = crtc_updates[i].filter.ramps.u8.blue_size;
-	  path = get_icc(crtc_updates[i].filter.crtc);
-	  if (path == NULL)
-	    {
-	      /* TODO remove CRTC */
-	    }
-	  else
-	    switch (load_icc(path, rampses + i, depths + i))
-	      {
-	      case 0:
-		break;
-	      case -1:
-		return cleanup(-1);
-	      case -2:
-		fprintf(stderr, "%s: unusable ICC profile: %s\n", argv0, path);
-		return cleanup(-3);
-	      }
-	}
-    }
-  
-  for (i = 0, r = 1; i < crtcs_n; i++)
-    {
-      if (!(crtc_updates[i].master) || !(crtc_info[i].supported))
-	continue;
-      if (!xflag)
-	{
-	  if (icc_pathname != NULL)
-	    fill_filter(&(crtc_updates[i].filter), &uniramps, unidepth);
-	  else
-	    fill_filter(&(crtc_updates[i].filter), rampses + i, depths[i]);
-	}
-      r = update_filter(i, 0);
-      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	return cleanup(r);
-      if (crtc_updates[i].slaves != NULL)
-	for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	  {
-	    r = update_filter(crtc_updates[i].slaves[j], 0);
-	    if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	      return cleanup(r);
-	  }
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return cleanup(r);
-  
-  if (!dflag)
-    return cleanup(0);
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return cleanup(-1);
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return cleanup(-1);
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return cleanup(-1);
-}
-
diff --git a/src/cg-limits.c b/src/cg-limits.c
deleted file mode 100644
index 8390385..0000000
--- a/src/cg-limits.c
+++ /dev/null
@@ -1,731 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <sys/stat.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = -((int64_t)1 << 62);
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-limits::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * -B: brightness listing file
- */
-static char* Bflag = NULL;
-
-/**
- * -C: constrat listing file
- */
-static char* Cflag = NULL;
-
-/**
- * The brightness of the red channel
- */
-static double rbrightness = 0;
-
-/**
- * The brightness of the green channel
- */
-static double gbrightness = 0;
-
-/**
- * The brightness of the blue channel
- */
-static double bbrightness = 0;
-
-/**
- * The contrast of the red channel
- */
-static double rcontrast = 1;
-
-/**
- * The contrast of the green channel
- */
-static double gcontrast = 1;
-
-/**
- * The contrast of the blue channel
- */
-static double bcontrast = 1;
-
-/**
- * `NULL`-terminated list of output names
- * listed in the brightness configuration file
- */
-static char** brightness_names = NULL;
-
-/**
- * The brightness of the red channel on monitor
- * with same index in `brightness_names`
- */
-static double* rbrightnesses = NULL;
-
-/**
- * The brightness of the green channel on monitor
- * with same index in `brightness_names`
- */
-static double* gbrightnesses = NULL;
-
-/**
- * The brightness of the blue channel on monitor
- * with same index in `brightness_names`
- */
-static double* bbrightnesses = NULL;
-
-/**
- * `NULL`-terminated list of output names
- * listed in the contrast configuration file
- */
-static char** contrast_names = NULL;
-
-/**
- * The contrast of the red channel on monitor
- * with same index in `contrast_names`
- */
-static double* rcontrasts = NULL;
-
-/**
- * The contrast of the green channel on monitor
- * with same index in `contrast_names`
- */
-static double* gcontrasts = NULL;
-
-/**
- * The contrast of the blue channel on monitor
- * with same index in `contrast_names`
- */
-static double* bcontrasts = NULL;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] (-x | [-p priority] [-d] "
-	  "([-B brightness-file] [-C contrast-file] | brightness-all:contrast-all | "
-	  "brightness-red:contrast-red brightness-green:contrast-green brightness-blue:contrast-blue))\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Perform cleanup so valgrind output is clean
- * 
- * @param   ret  The value to return
- * @return       `ret` is returned as is
- */
-static int cleanup(int ret)
-{
-  int saved_errno = errno;
-  if (brightness_names != NULL)
-    {
-      char** p = brightness_names;
-      while (*p)
-	free(*p++);
-    }
-  free(brightness_names);
-  free(rbrightnesses);
-  free(gbrightnesses);
-  free(bbrightnesses);
-  if (contrast_names != NULL)
-    {
-      char** p = contrast_names;
-      while (*p)
-	free(*p++);
-    }
-  free(contrast_names);
-  free(rcontrasts);
-  free(gcontrasts);
-  free(bcontrasts);
-  errno = saved_errno;
-  return ret;
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      case 'B':
-	if (Bflag || !(Bflag = arg))
-	  usage();
-	return 1;
-      case 'C':
-	if (Cflag || !(Cflag = arg))
-	  usage();
-	return 1;
-      default:
-	usage();
-      }
-  return 0;
-}
-
-
-/**
- * Get the pathname of a configuration file
- * 
- * @param   confname   The filename (excluding directory) of the configuration file
- * @return             The full pathname of the configuration file, `NULL` on error
- */
-static char* get_conf_file(const char* restrict confname)
-{
-  struct passwd* pw;
-  char* path;
-  
-  pw = getpwuid(getuid());
-  if ((pw == NULL) || (pw->pw_dir == NULL))
-    return NULL;
-  
-  path = malloc(strlen(pw->pw_dir) + strlen(confname) + sizeof("/.config/"));
-  if (path == NULL)
-    return NULL;
-  
-  sprintf(path, "%s/.config/%s", pw->pw_dir, confname);
-  
-  if (access(path, F_OK) < 0)
-    sprintf(path, "/etc/%s", confname);
-  
-  return path;
-}
-
-
-/**
- * Parse a double encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_double(double* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  *out = strtod(str, &end);
-  if (errno || isinf(*out) || isnan(*out) || *end)
-    return -1;
-  if (!*str || !strchr("-0123456789.", *str))
-    return -1;
-  return 0;
-}
-
-
-/**
- * Parse two doubles encoded as a "%lf:%lf" string
- * 
- * @param   left   Output parameter for the first value
- * @param   right  Output parameter for the second value
- * @param   str    The string
- * @return         Zero on success, -1 if the string is invalid
- */
-static int parse_twidouble(double* restrict left, double* restrict right, const char* restrict str)
-{
-  char* p = strchr(str, ':');
-  int r;
-  if (p == NULL)
-    return -1;
-  *p = '\0';
-  r = -((parse_double(left, str) < 0) || (parse_double(right, p + 1) < 0));
-  *p = ':';
-  return r;
-}
-
-
-/**
- * Parse configuration file
- * 
- * @param   pathname  The pathname of the file
- * @param   names     Reference to the list of names
- * @param   rs        Reference to the list of red values
- * @param   gs        Reference to the list of green values
- * @param   bs        Reference to the list of blue values
- * @return            Zero on success, -1 on error
- */
-static int parse_conf_file(const char* restrict pathname, char*** restrict names,
-			   double** restrict rs, double** restrict gs, double** restrict bs)
-{
-  int fd, saved_errno;
-  char* line = NULL;
-  size_t size = 0, lineno = 0, ptr = 0, alloc = 0;
-  ssize_t n;
-  FILE* f = NULL;
-  char* p;
-  char* q;
-  char* r;
-  char* g;
-  char* b;
-  
-  fd = open(pathname, O_RDONLY);
-  if (fd == -1)
-    return -1;
-  
-  f = fdopen(fd, "rb");
-  if (f == NULL)
-    goto fail;
-  
-  while (n = getline(&line, &size, f), n >= 0)
-    {
-      lineno += 1;
-      
-      if ((n > 0) && (line[n - 1] == '\n'))
-	line[n - 1] = '\0';
-      p = line;
-      while ((*p == ' ') || (*p == '\t')) p++;
-      if ((!*p) || (*p == '#'))
-	continue;
-      
-      r = strpbrk(line, " \t");
-      if (r == NULL)
-	goto bad;
-      while (r[1] == ' ' || r[1] == '\t') r++;
-      g = strpbrk(r + 1, " \t");
-      if (g == NULL)
-	goto bad;
-      while (g[1] == ' ' || g[1] == '\t') g++;
-      b = strpbrk(g + 1, " \t");
-      if (b == NULL)
-	goto bad;
-      while (b[1] == ' ' || b[1] == '\t') b++;
-      
-      for (;;)
-	{
-	  q = strpbrk(b + 1, " \t");
-	  if (q == NULL)
-	    break;
-	  while (q[1] == ' ' || q[1] == '\t') q++;
-	  if (!*q)
-	    break;
-	  r = g, g = b, b = q;
-	}
-      
-      *r++ = '\0';
-      *g++ = '\0';
-      *b++ = '\0';
-      
-      q = strpbrk(r, " \t");
-      if (q != NULL)
-	*q = '\0';
-      q = strpbrk(g, " \t");
-      if (q != NULL)
-	*q = '\0';
-      q = strpbrk(b, " \t");
-      if (q != NULL)
-	*q = '\0';
-      
-      q = strchr(p, '\0');
-      while ((q != p) && ((q[-1] == ' ') || (q[-1] == '\t')))
-	q--;
-      *q = '\0';
-      
-      if (ptr == alloc)
-	{
-	  void* new;
-	  size_t new_size = alloc ? (alloc << 1) : 4;
-	  
-	  new = realloc(*rs, new_size * sizeof(**rs));
-	  if (new == NULL)
-	    goto fail;
-	  *rs = new;
-	  
-	  new = realloc(*gs, new_size * sizeof(**gs));
-	  if (new == NULL)
-	    goto fail;
-	  *gs = new;
-	  
-	  new = realloc(*bs, new_size * sizeof(**bs));
-	  if (new == NULL)
-	    goto fail;
-	  *bs = new;
-	  
-	  new = realloc(*names, (new_size + 1) * sizeof(**names));
-	  if (new == NULL)
-	    goto fail;
-	  *names = new;
-	  memset(*names + alloc, 0, (new_size + 1 - alloc) * sizeof(**names));
-	  
-	  alloc = new_size;
-	}
-      
-      if ((parse_double((*rs) + ptr, r) < 0) ||
-	  (parse_double((*gs) + ptr, g) < 0) ||
-	  (parse_double((*bs) + ptr, b) < 0))
-	goto bad;
-      (*names)[ptr] = malloc(strlen(p) + 1);
-      if ((*names)[ptr] == NULL)
-	goto fail;
-      strcpy((*names)[ptr], p);
-      ptr++;
-      
-      continue;
-    bad:
-      fprintf(stderr, "%s: ignoring malformatted line in %s: %zu\n", argv0, pathname, lineno);
-    }
-  
-  if (fclose(f) < 0)
-    {
-      f = NULL;
-      goto fail;
-    }
-  close(fd);
-  free(line);
-  return 0;
- fail:
-  saved_errno = errno;
-  free(line);
-  if (f != NULL)
-    fclose(f);
-  if (fd >= 0)
-    close(fd);
-  errno = saved_errno;
-  return -1;
-}
-
-
-/**
- * Parse brightness configuration file
- * 
- * @param   pathname  The pathname of the file
- * @return            Zero on success, -1 on error
- */
-static int parse_brightness_file(const char* restrict pathname)
-{
-  return parse_conf_file(pathname, &brightness_names, &rbrightnesses, &gbrightnesses, &bbrightnesses);
-}
-
-
-/**
- * Parse contrast configuration file
- * 
- * @param   pathname  The pathname of the file
- * @return            Zero on success, -1 on error
- */
-static int parse_contrast_file(const char* restrict pathname)
-{
-  return parse_conf_file(pathname, &contrast_names, &rcontrasts, &gcontrasts, &bcontrasts);
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return          Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int free_Bflag = 0, free_Cflag = 0, saved_errno;
-  int q = xflag + dflag;
-  if ((q > 1) || (xflag && ((Bflag != NULL) || (Cflag != NULL) || (argc > 0) || (prio != NULL))))
-    usage();
-  if ((Bflag || Cflag) && argc)
-    usage();
-  
-  if (argc == 1)
-    {
-      if (parse_twidouble(&rbrightness, &rcontrast, argv[0]) < 0)
-	usage();
-      bbrightness = gbrightness = rbrightness;
-      bcontrast = gcontrast = rcontrast;
-    }
-  else if (argc == 3)
-    {
-      if (parse_twidouble(&rbrightness, &rcontrast, argv[0]) < 0)
-	usage();
-      if (parse_twidouble(&gbrightness, &gcontrast, argv[1]) < 0)
-	usage();
-      if (parse_twidouble(&bbrightness, &bcontrast, argv[2]) < 0)
-	usage();
-    }
-  else if (argc)
-    usage();
-  
-  if (!argc && !Bflag && !xflag)
-    {
-      Bflag = get_conf_file("brightness");
-      if (Bflag == NULL)
-	return -1;
-      free_Bflag = 1;
-    }
-  if (Bflag)
-    if (parse_brightness_file(Bflag) < 0)
-      goto fail;
-  if (free_Bflag)
-    free(Bflag), Bflag = NULL;
-  
-  if (!argc && !Cflag && !xflag)
-    {
-      Cflag = get_conf_file("contrast");
-      if (Cflag == NULL)
-	return -1;
-      free_Cflag = 1;
-    }
-  if (Cflag)
-    if (parse_contrast_file(Cflag) < 0)
-      goto fail;
-  if (free_Cflag)
-    free(Cflag), Cflag = NULL;
-  
-  return 0;
- fail:
-  saved_errno = errno;
-  if (free_Bflag)
-    free(Bflag), Bflag = NULL;
-  if (free_Cflag)
-    free(Cflag), Cflag = NULL;
-  errno = saved_errno;
-  return cleanup(-1);
-}
-
-
-/**
- * Fill a filter
- * 
- * @param   filter  The filter to fill
- * @param   rb      The red brightness
- * @param   rc      The red contrast
- * @param   gb      The green brightness
- * @param   gc      The green contrast
- * @param   bb      The blue brightness
- * @param   bc      The blue contrast
- * @return          Zero on success, -1 on error
- */
-static int fill_filter(libcoopgamma_filter_t* restrict filter,
-		       double rb, double rc, double gb, double gc, double bb, double bc)
-{
-  union libcoopgamma_ramps dramps;
-  size_t size;
-  
-  if (filter->depth == LIBCOOPGAMMA_DOUBLE)
-    {
-      libclut_rgb_limits(&(filter->ramps.d), (double)1, double, rb, rc, gb, gc, bb, bc);
-      libclut_clip(&(filter->ramps.d), (double)1, double, 1, 1, 1);
-      return 0;
-    }
-  if (filter->depth == LIBCOOPGAMMA_FLOAT)
-    {
-      libclut_rgb_limits(&(filter->ramps.f), (float)1, float, rb, rc, gb, gc, bb, bc);
-      libclut_clip(&(filter->ramps.f), (float)1, float, 1, 1, 1);
-      return 0;
-    }  
-  
-  size  = dramps.d.red_size   = filter->ramps.d.red_size;
-  size += dramps.d.green_size = filter->ramps.d.green_size;
-  size += dramps.d.blue_size  = filter->ramps.d.blue_size;
-  dramps.d.red = calloc(size, sizeof(double));
-  if (dramps.d.red == NULL)
-    return -1;
-  dramps.d.green = dramps.d.red   + dramps.d.red_size;
-  dramps.d.blue  = dramps.d.green + dramps.d.green_size;
-  
-  libclut_start_over(&(dramps.d), (double)1, double, 1, 1, 1);
-  libclut_rgb_limits(&(dramps.d), (double)1, double, rb, rc, gb, gc, bb, bc);
-  libclut_clip(&(dramps.d), (double)1, double, 1, 1, 1);
-  
-  switch (filter->depth)
-    {
-    case LIBCOOPGAMMA_UINT8:
-      libclut_translate(&(filter->ramps.u8), UINT8_MAX, uint8_t, &(dramps.d), (double)1, double);
-      break;
-    case LIBCOOPGAMMA_UINT16:
-      libclut_translate(&(filter->ramps.u16), UINT16_MAX, uint16_t, &(dramps.d), (double)1, double);
-      break;
-    case LIBCOOPGAMMA_UINT32:
-      libclut_translate(&(filter->ramps.u32), UINT32_MAX, uint32_t, &(dramps.d), (double)1, double);
-      break;
-    case LIBCOOPGAMMA_UINT64:
-      libclut_translate(&(filter->ramps.u64), UINT64_MAX, uint64_t, &(dramps.d), (double)1, double);
-      break;
-    default:
-      abort();
-    }
-  
-  free(dramps.d.red);
-  return 0;
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j, k;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag && ((brightness_names != NULL) || (contrast_names != NULL)))
-    if ((r = make_slaves()) < 0)
-      return cleanup(r);
-  
-  if ((brightness_names == NULL) && (contrast_names == NULL))
-    for (i = 0, r = 1; i < filters_n; i++)
-      {
-	if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	  continue;
-	if (!xflag)
-	  if ((r = fill_filter(&(crtc_updates[i].filter), rbrightness, rcontrast,
-			       gbrightness, gcontrast, bbrightness, bcontrast)) < 0)
-	    return cleanup(r);
-	r = update_filter(i, 0);
-	if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	  return cleanup(r);
-	if (crtc_updates[i].slaves != NULL)
-	  for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	    {
-	      r = update_filter(crtc_updates[i].slaves[j], 0);
-	      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		return cleanup(r);
-	    }
-      }
-  else
-    {
-      char* empty = NULL;
-      char** bnames = brightness_names ? brightness_names : &empty;
-      char** cnames = contrast_names ? contrast_names : &empty;
-      for (i = 0, r = 1; i < filters_n; i++)
-	{
-	  if (!(crtc_info[crtc_updates[i].crtc].supported))
-	    continue;
-	  for (j = 0; bnames[j] != NULL; j++)
-	    if (!strcasecmp(crtc_updates[i].filter.crtc, bnames[j]))
-	      break;
-	  for (k = 0; cnames[k] != NULL; k++)
-	    if (!strcasecmp(crtc_updates[i].filter.crtc, cnames[k]))
-	      break;
-	  if ((bnames[j] != NULL) || (cnames[k] != NULL))
-	    {
-	      double rb = 0, gb = 0, bb = 0, rc = 1, bc = 1, gc = 1;
-	      if (bnames[j] != NULL)
-		rb = rbrightnesses[j], gb = gbrightnesses[j], bb = bbrightnesses[j];
-	      if (cnames[j] != NULL)
-		rc = rcontrasts[j], gc = gcontrasts[j], bc = bcontrasts[j];
-	      if ((r = fill_filter(&(crtc_updates[i].filter), rb, rc, gb, gc, bb, bc)) < 0)
-		return cleanup(r);
-	      r = update_filter(i, 0);
-	      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		return cleanup(r);
-	    }
-	}
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return cleanup(r);
-  
-  if (!dflag)
-    return cleanup(0);
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return cleanup(-1);
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return cleanup(-1);
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return cleanup(-1);
-}
-
diff --git a/src/cg-linear.c b/src/cg-linear.c
deleted file mode 100644
index 1ce9a5d..0000000
--- a/src/cg-linear.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = NO_DEFAULT_PRIORITY;
-
-/**
- * The default class base for the program
- */
-char default_class[] = PKGNAME "::cg-linear::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){":start", ":stop", NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * +r: do not touch the red channel
- */
-static int rplus = 0;
-
-/**
- * +g: do not touch the green channel
- */
-static int gplus = 0;
-
-/**
- * +b: do not touch the blue channel
- */
-static int bplus = 0;
-
-/**
- * The priority of the linearisation filter
- */
-static int64_t start_priority;
-
-/**
- * The priority of the delinearisation filter
- */
-static int64_t stop_priority;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule-base] "
-	  "(-x | -p start-priority:stop-priority [-d] [+rgb])\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      default:
-	usage();
-      }
-  else
-    switch (opt[1])
-      {
-      case 'r':
-	if (rplus)
-	  usage();
-	rplus = 1;
-	break;
-      case 'g':
-	if (gplus)
-	  usage();
-	gplus = 1;
-	break;
-      case 'b':
-	if (bplus)
-	  usage();
-	bplus = 1;
-	break;
-      default:
-	usage();
-      }
-  return 0;
-  (void) arg;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int q = xflag + (dflag | rplus | gplus | bplus);
-  char *p, *end;
-  if (argc || (q > 1) || (xflag && (prio != NULL)))
-    usage();
-  if (!xflag && (prio == NULL))
-    usage();
-  if (prio != NULL)
-    {
-      p = strchr(prio, ':');
-      if (!p)
-	usage();
-      *p++ = '\0';
-      errno = 0;
-      start_priority = (size_t)strtoul(prio, &end, 10);
-      if (errno || *end || !*prio)
-	usage();
-      stop_priority = (size_t)strtoul(p, &end, 10);
-      if (errno || *end || !*prio)
-	usage();
-      p[-1] = ':';
-    }
-  return 0;
-  (void) argv;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter    The filter to fill
- * @param  is_start  If the fitler is a linearisation filter
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter, int is_start)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-      if (is_start)\
-        libclut_linearise(&(filter->ramps.MEMBER), MAX, TYPE, !rplus, !gplus, !bplus);\
-      else\
-        libclut_standardise(&(filter->ramps.MEMBER), MAX, TYPE, !rplus, !gplus, !bplus);\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  for (i = 0, r = 1; i < filters_n; i++)
-    {
-      if (!(crtc_info[crtc_updates[i].crtc].supported))
-	continue;
-      if (!xflag) {
-	int is_start = strchr(crtc_updates[i].filter.class, '\0')[-1] == 't';
-	fill_filter(&(crtc_updates[i].filter), is_start);
-	crtc_updates[i].filter.priority = is_start ? start_priority : stop_priority;
-      }
-      r = update_filter(i, 0);
-      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	return r;
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return r;
-  
-  if (!dflag)
-    return 0;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return -1;
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return -1;
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return -1;
-}
-
diff --git a/src/cg-negative.c b/src/cg-negative.c
deleted file mode 100644
index 8a98959..0000000
--- a/src/cg-negative.c
+++ /dev/null
@@ -1,255 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = (int64_t)1 << 62;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-negative::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * +r: do not touch the red channel
- */
-static int rplus = 0;
-
-/**
- * +g: do not touch the green channel
- */
-static int gplus = 0;
-
-/**
- * +b: do not touch the blue channel
- */
-static int bplus = 0;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] (-x | [-p priority] [-d] [+rgb])\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      default:
-	usage();
-      }
-  else
-    switch (opt[1])
-      {
-      case 'r':
-	if (rplus)
-	  usage();
-	rplus = 1;
-	break;
-      case 'g':
-	if (gplus)
-	  usage();
-	gplus = 1;
-	break;
-      case 'b':
-	if (bplus)
-	  usage();
-	bplus = 1;
-	break;
-      default:
-	usage();
-      }
-  return 0;
-  (void) arg;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int q = xflag + (dflag | rplus | gplus | bplus);
-  if (argc || (q > 1) || (xflag && (prio != NULL)))
-    usage();
-  return 0;
-  (void) argv;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-      libclut_negative(&(filter->ramps.MEMBER), MAX, TYPE, !rplus, !gplus, !bplus);\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag)
-    if ((r = make_slaves()) < 0)
-      return r;
-  
-  for (i = 0, r = 1; i < filters_n; i++)
-    {
-      if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	continue;
-      if (!xflag)
-	fill_filter(&(crtc_updates[i].filter));
-      r = update_filter(i, 0);
-      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	return r;
-      if (crtc_updates[i].slaves != NULL)
-	for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	  {
-	    r = update_filter(crtc_updates[i].slaves[j], 0);
-	    if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	      return r;
-	  }
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return r;
-  
-  if (!dflag)
-    return 0;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return -1;
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return -1;
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return -1;
-}
-
diff --git a/src/cg-query.c b/src/cg-query.c
deleted file mode 100644
index a24ef11..0000000
--- a/src/cg-query.c
+++ /dev/null
@@ -1,514 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "arg.h"
-
-#include <libcoopgamma.h>
-
-#include <errno.h>
-#include <inttypes.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-
-/**
- * The libcoopgamma context
- */
-static libcoopgamma_context_t cg;
-
-/**
- * Filter query
- */
-static libcoopgamma_filter_query_t query;
-
-/**
- * The class of the filter to print
- */
-static char* class = NULL;
-
-
-
-/**
- * Print usage information and exit
- */
-static void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-h high] [-l low] [-f class] -c crtc\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Initialise the process, specifically
- * reset the signal mask and signal handlers
- * 
- * @return  Zero on success, -1 on error
- */
-static int initialise_proc(void)
-{
-  sigset_t sigmask;
-  int sig;
-  
-  for (sig = 1; sig < _NSIG; sig++)
-    if (signal(sig, SIG_DFL) == SIG_ERR)
-      if (sig == SIGCHLD)
-	return -1;
-  
-  if (sigemptyset(&sigmask) < 0)
-    return -1;
-  if (sigprocmask(SIG_SETMASK, &sigmask, NULL) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, a list of all
- * recognised adjustment methods
- * 
- * @return  Zero on success, -1 on error
- */
-static int list_methods(void)
-{
-  char** list;
-  size_t i;
-  
-  list = libcoopgamma_get_methods();
-  if (list == NULL)
-    return -1;
-  for (i = 0; list[i]; i++)
-    printf("%s\n", list[i]);
-  free(list);
-  if (fflush(stdout) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, a list of all CRTC:s
- * 
- * A connection to the coopgamma server
- * must have been made
- * 
- * @return  Zero on success, -1 on error, -2
- *          on libcoopgamma error
- */
-static int list_crtcs(void)
-{
-  char** list;
-  size_t i;
-  
-  list = libcoopgamma_get_crtcs_sync(&cg);
-  if (list == NULL)
-    return -2;
-  for (i = 0; list[i]; i++)
-    printf("%s\n", list[i]);
-  free(list);
-  if (fflush(stdout) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, information about
- * the selected CRTC
- * 
- * @return  Zero on success, -1 on error, -2
- *          on libcoopgamma error, -3 on error
- *          with error message already printed
- */
-static int print_info(void)
-{
-  libcoopgamma_crtc_info_t info;
-  libcoopgamma_filter_table_t table;
-  const char* str;
-  int saved_errno, ret = 0;
-  size_t i;
-  
-  if (libcoopgamma_crtc_info_initialise(&info) < 0)
-    return -1;
-  if (libcoopgamma_filter_table_initialise(&table) < 0)
-    {
-      saved_errno = errno;
-      libcoopgamma_crtc_info_destroy(&info);
-      errno = saved_errno;
-      return -1;
-    }
-  
-  if (libcoopgamma_get_gamma_info_sync(query.crtc, &info, &cg) < 0)
-    goto cg_fail;
-  
-  printf("Cooperative gamma server running: %s\n",
-	 info.cooperative ? "yes" : "no");
-  
-  printf("Gamma adjustments supported: %s\n",
-	 info.supported == LIBCOOPGAMMA_MAYBE ? "maybe" : info.supported ? "yes" : "no");
-  
-  printf("Gamma ramps stops (red green blue): %zu %zu %zu\n",
-	 info.red_size, info.green_size, info.blue_size);
-  
-  switch (info.depth)
-    {
-    case LIBCOOPGAMMA_DOUBLE:  str = "double-precision floating-point";  break;
-    case LIBCOOPGAMMA_FLOAT:   str = "single-precision floating-point";  break;
-    case LIBCOOPGAMMA_UINT8:   str = "unsigned 8-bit integer";           break;
-    case LIBCOOPGAMMA_UINT16:  str = "unsigned 16-bit integer";          break;
-    case LIBCOOPGAMMA_UINT32:  str = "unsigned 32-bit integer";          break;
-    case LIBCOOPGAMMA_UINT64:  str = "unsigned 64-bit integer";          break;
-    default:
-      errno = EPROTO;
-      goto fail;
-    }
-  printf("Gamma ramps stops value type: %s\n", str);
-  
-  if (info.colourspace != LIBCOOPGAMMA_UNKNOWN)
-    {
-      switch (info.colourspace)
-	{
-	case LIBCOOPGAMMA_SRGB:     str = "sRGB";                              break;
-	case LIBCOOPGAMMA_RGB:      str = "non-standard RGB";                  break;
-	case LIBCOOPGAMMA_NON_RGB:  str = "non-RGB multicolour";               break;
-	case LIBCOOPGAMMA_GREY:     str = "monochrome or singlecolour scale";  break;
-	default:
-	  errno = EPROTO;
-	  goto fail;
-	}
-      printf("Monitor's colourspace: %s\n", str);
-    }
-  
-  if (info.have_gamut)
-    {
-      printf("Monitor's red colour (x, y): %lf, %lf\n",
-	     info.red_x / (double)1024, info.red_y / (double)1024);
-      
-      printf("Monitor's green colour (x, y): %lf, %lf\n",
-	     info.green_x / (double)1024, info.green_y / (double)1024);
-      
-      printf("Monitor's blue colour (x, y): %lf, %lf\n",
-	     info.blue_x / (double)1024, info.blue_y / (double)1024);
-      
-      printf("Monitor's white point (x, y): %lf, %lf\n",
-	     info.white_x / (double)1024, info.white_y / (double)1024);
-    }
-  
-  if (libcoopgamma_get_gamma_sync(&query, &table, &cg) < 0)
-    goto cg_fail;
-  
-  if ((table.red_size != info.red_size) || (table.green_size != info.green_size) ||
-      (table.blue_size != info.blue_size) || (table.depth != info.depth))
-    {
-      fprintf(stderr, "%s: gamma ramp structure changed between queries\n", argv0);
-      goto custom_fail;
-    }
-  
-  printf("Filters: %zu\n", table.filter_count);
-  for (i = 0; i < table.filter_count; i++)
-    {
-      printf("  Filter %zu:\n", i);
-      printf("    Priority: %" PRIi64 "\n", table.filters[i].priority);
-      printf("    Class: %s\n", table.filters[i].class);
-    }
-  
- done:
-  saved_errno = errno;
-  libcoopgamma_crtc_info_destroy(&info);
-  libcoopgamma_filter_table_destroy(&table);
-  errno = saved_errno;
-  return ret;
- fail:
-  ret = -1;
-  goto done;
- cg_fail:
-  ret = -2;
-  goto done;
- custom_fail:
-  ret = -3;
-  goto done;
-}
-
-
-
-/**
- * Print, to stdout, the ramps of the select
- * filter on the select CRTC
- * 
- * @return  Zero on success, -1 on error, -2
- *          on libcoopgamma error, -3 on error
- *          with error message already printed
- */
-static int print_filter(void)
-{
-  libcoopgamma_filter_table_t table;
-  libcoopgamma_ramps_t* restrict ramps;
-  int saved_errno, ret = 0;
-  size_t i, n;
-  
-  if (libcoopgamma_filter_table_initialise(&table) < 0)
-    return -1;
-  
-  if (libcoopgamma_get_gamma_sync(&query, &table, &cg) < 0)
-    goto cg_fail;
-  
-  if (query.coalesce)
-    i = 0;
-  else
-    for (i = 0; i < table.filter_count; i++)
-      if (!strcmp(table.filters[i].class, class))
-	break;
-  if (i == table.filter_count)
-    {
-      fprintf(stderr, "%s: selected filter does not exist on selected CRTC\n", argv0);
-      goto custom_fail;
-    }
-  ramps = &(table.filters[i].ramps);
-  
-  n = table.red_size;
-  if (n < table.green_size)
-    n = table.green_size;
-  if (n < table.blue_size)
-    n = table.blue_size;
-  
-  switch (table.depth)
-    {
-#define X(CONST, MEMBER, TYPE, FORMAT, DASH)				\
-    case CONST:								\
-      for (i = 0; i < n; i++)						\
-	{								\
-	  if (i < ramps->MEMBER.red_size)				\
-	    printf("%" FORMAT " ", (TYPE)(ramps->MEMBER.red[i]));	\
-	  else								\
-	    printf(DASH " ");						\
-	  if (i < ramps->MEMBER.green_size)				\
-	    printf("%" FORMAT " ", (TYPE)(ramps->MEMBER.green[i]));	\
-	  else								\
-	    printf(DASH " ");						\
-	  if (i < ramps->MEMBER.blue_size)				\
-	    printf("%" FORMAT "\n", (TYPE)(ramps->MEMBER.blue[i]));	\
-	  else								\
-	    printf(DASH "\n");						\
-	}								\
-      break
-    X(LIBCOOPGAMMA_DOUBLE, d,   double,   "lf",         "----");
-    X(LIBCOOPGAMMA_FLOAT,  f,   double,   "lf",         "----");
-    X(LIBCOOPGAMMA_UINT8,  u8,  uint8_t,  "02"  PRIx8,  "--");
-    X(LIBCOOPGAMMA_UINT16, u16, uint16_t, "04"  PRIx16, "----");
-    X(LIBCOOPGAMMA_UINT32, u32, uint32_t, "08"  PRIx32, "--------");
-    X(LIBCOOPGAMMA_UINT64, u64, uint64_t, "016" PRIx64, "----------------");
-#undef X
-    default:
-      errno = EPROTO;
-      goto fail;
-    }
-  
- done:
-  saved_errno = errno;
-  libcoopgamma_filter_table_destroy(&table);
-  errno = saved_errno;
-  return ret;
- fail:
-  ret = -1;
-  goto done;
- cg_fail:
-  ret = -2;
-  goto done;
- custom_fail:
-  ret = -3;
-  goto done;
-}
-
-
-/**
- * -M METHOD
- *     Select adjustment method. If METHOD is "?",
- *     available methods will be printed to stdout.
- * 
- * -S SITE
- *     Select site (display server instance).
- * 
- * -c CRTC
- *     Select CRT controller. If CRTC is "?", CRTC:s
- *     will be printed to stdout.
- * 
- * -h HIGH
- *     Suppress filter with higher priority than HIGH.
- * 
- * -l LOW
- *     Suppress filter with lower priority than LOW.
- * 
- * -f CLASS
- *     Print gamma ramps of the filter with class CLASS
- *     on the selected CRTC. If CLASS is "*" all filters
- *     with a priority in [LOW, HIGH] are coalesced.
- * 
- * @param   argc  The number of command line arguments
- * @param   argv  The command line arguments
- * @return        0 on success, 1 on error
- */
-int main(int argc, char* argv[])
-{
-  int stage = 0, haveh = 0, havel = 0;
-  int rc = 0;
-  char* method = NULL;
-  char* site = NULL;
-  
-  query.high_priority = INT64_MAX;
-  query.low_priority = INT64_MIN;
-  query.crtc = NULL;
-  query.coalesce = 0;
-  
-  ARGBEGIN
-    {
-    case 'M':
-      if (method != NULL)
-	usage();
-      method = EARGF(usage());
-      break;
-    case 'S':
-      if (site != NULL)
-	usage();
-      site = EARGF(usage());
-      break;
-    case 'c':
-      if (query.crtc != NULL)
-	usage();
-      query.crtc = EARGF(usage());
-      break;
-    case 'h':
-      if (haveh++)
-	usage();
-      query.high_priority = (int64_t)atoll(EARGF(usage()));
-      break;
-    case 'l':
-      if (havel++)
-	usage();
-      query.low_priority = (int64_t)atoll(EARGF(usage()));
-      break;
-    case 'f':
-      if (class != NULL)
-	usage();
-      class = EARGF(usage());
-      if ((class[0] == '*') && (class[1] == '\0'))
-	query.coalesce = 1;
-      break;
-    default:
-      usage();
-    }
-  ARGEND;
-  
-  if (argc)
-    usage();
-  
-  if (initialise_proc() < 0)
-    goto fail;
-  
-  if ((method != NULL) && !strcmp(method, "?"))
-    {
-      if ((site != NULL) || (query.crtc != NULL))
-	usage();
-      if (list_methods() < 0)
-	goto fail;
-      return 0;
-    }
-  
-  if (libcoopgamma_context_initialise(&cg) < 0)
-    goto fail;
-  stage++;
-  if (libcoopgamma_connect(method, site, &cg) < 0)
-    {
-      fprintf(stderr, "%s: server failed to initialise\n", argv0);
-      goto custom_fail;
-    }
-  stage++;
-  
-  if (!(query.crtc))
-    usage();
-  
-  if (!strcmp(query.crtc, "?"))
-    switch (list_crtcs())
-      {
-      case 0:
-	goto done;
-      case -1:
-	goto fail;
-      default:
-	goto cg_fail;
-      }
-  
-  switch (class ? print_filter() : print_info())
-    {
-    case 0:
-      goto done;
-    case -1:
-      goto fail;
-    case -2:
-      goto cg_fail;
-    default:
-      goto custom_fail;
-    }
-  
-  fflush(stdout);
-  if (ferror(stdout))
-    goto fail;
-  if (fclose(stdout) < 0)
-    goto fail;
-  
- done:
-  if (stage >= 1)
-    libcoopgamma_context_destroy(&cg, stage >= 2);
-  return rc;
-  
- custom_fail:
-  rc = 1;
-  goto done;
-  
- fail:
-  rc = 1;
-  perror(argv0);
-  goto done;
-  
- cg_fail:
-  rc = 1;
-  {
-    const char* side = cg.error.server_side ? "server" : "client";
-    if (cg.error.custom)
-      {
-	if ((cg.error.number != 0) || (cg.error.description != NULL))
-	  fprintf(stderr, "%s: %s-side error number %" PRIu64 ": %s\n",
-		  argv0, side, cg.error.number, cg.error.description);
-	else if (cg.error.number != 0)
-	  fprintf(stderr, "%s: %s-side error number %" PRIu64 "\n", argv0, side, cg.error.number);
-	else if (cg.error.description != NULL)
-	  fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description);
-      }
-    else if (cg.error.description != NULL)
-      fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description);
-    else
-      fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, strerror(cg.error.number));
-  }
-  goto done;
-}
-
diff --git a/src/cg-rainbow.c b/src/cg-rainbow.c
deleted file mode 100644
index 067785f..0000000
--- a/src/cg-rainbow.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <errno.h>
-#include <math.h>
-#include <sched.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = (int64_t)1 << 60;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-rainbow::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -s: rainbow-frequency in Hz
- */
-static char* sflag = NULL;
-
-/**
- * -l: base luminosity
- */
-static char* lflag = NULL;
-
-/**
- * The rainbow-frequency multiplied by 3
- */
-double rainbows_per_third_second = 1;
-
-/**
- * The base luminosity
- */
-double luminosity = (double)1 / 3;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] [-p priority]"
-	  " [-l luminosity] [-s rainbowhz]\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'l':
-	if (lflag || !(lflag = arg))
-	  usage();
-	return 1;
-      case 's':
-	if (sflag || !(sflag = arg))
-	  usage();
-	return 1;
-      default:
-	usage();
-      }
-  else
-    usage();
-  return 0;
-}
-
-
-/**
- * Parse a non-negative double encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_double(double* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  *out = strtod(str, &end);
-  if (errno || (*out < 0) || isinf(*out) || isnan(*out) || *end)
-    return -1;
-  if (!*str || !strchr("0123456789.", *str))
-    return -1;
-  return 0;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int q = (lflag || sflag);
-  if ((q > 1) || argc)
-    usage();
-  if (sflag != NULL)
-    {
-      if (parse_double(&rainbows_per_third_second, sflag) < 0)
-	usage();
-      rainbows_per_third_second *= 3;
-    }
-  if (lflag != NULL)
-    {
-      if (parse_double(&luminosity, lflag) < 0)
-	usage();
-    }
-  return 0;
-  (void) argv;
-  (void) prio;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- * @param  red     The red brightness
- * @param  green   The green brightness
- * @param  blue    The blue brightness
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter, double red, double green, double blue)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-      libclut_start_over(&(filter->ramps.MEMBER), MAX, TYPE, 1, 1, 1);\
-      libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, red, green, blue);\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * Get the current monotonic time as a double
- * 
- * @param   now  Output parameter for the current time (monotonic)
- * @return       Zero on success, -1 on error
- */
-static int double_time(double* restrict now)
-{
-#ifndef CLOCK_MONOTONIC_RAW
-# define CLOCK_MONOTONIC_RAW  CLOCK_MONOTONIC
-#endif
-  struct timespec ts;
-  if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) < 0)
-    return -1;
-  *now  = (double)(ts.tv_nsec);
-  *now /= 1000000000L;
-  *now += (double)(ts.tv_sec);
-  return 0;
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  double pal[3];
-  double t, starttime;
-  
-  for (i = 0; i < filters_n; i++)
-    crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  
-  if ((r = make_slaves()) < 0)
-    return r;
-  
-  if ((r = double_time(&starttime)) < 0)
-    return r;
-  
-  for (;;)
-    {
-      if ((r = double_time(&t)) < 0)
-	return r;
-      t -= starttime;
-      t *= rainbows_per_third_second;
-      pal[0] = pal[1] = pal[2] = luminosity;
-      pal[((long)t) % 3] += 1 - fmod(t, 1);
-      pal[((long)t + 1) % 3] += fmod(t, 1);
-      if (pal[0] > 1)  pal[0] = 1;
-      if (pal[1] > 1)  pal[1] = 1;
-      if (pal[2] > 1)  pal[2] = 1;
-      
-      for (i = 0, r = 1; i < filters_n; i++)
-	{
-	  if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	    continue;
-	  fill_filter(&(crtc_updates[i].filter), pal[0], pal[1], pal[2]);
-	  r = update_filter(i, 0);
-	  if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	    return r;
-	  if (crtc_updates[i].slaves != NULL)
-	    for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	      {
-		r = update_filter(crtc_updates[i].slaves[j], 0);
-		if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		  return r;
-	      }
-	}
-      
-      while (r != 1)
-	if ((r = synchronise(-1)) < 0)
-	  return r;
-      
-      sched_yield();
-    }
-}
-
diff --git a/src/cg-remove.c b/src/cg-remove.c
deleted file mode 100644
index d942f87..0000000
--- a/src/cg-remove.c
+++ /dev/null
@@ -1,403 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "arg.h"
-
-#include <libcoopgamma.h>
-
-#include <errno.h>
-#include <inttypes.h>
-#include <poll.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-
-/**
- * The libcoopgamma context
- */
-static libcoopgamma_context_t cg;
-
-
-
-/**
- * Print usage information and exit
- */
-static void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... class...\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Initialise the process, specifically
- * reset the signal mask and signal handlers
- * 
- * @return  Zero on success, -1 on error
- */
-static int initialise_proc(void)
-{
-  sigset_t sigmask;
-  int sig;
-  
-  for (sig = 1; sig < _NSIG; sig++)
-    if (signal(sig, SIG_DFL) == SIG_ERR)
-      if (sig == SIGCHLD)
-	return -1;
-  
-  if (sigemptyset(&sigmask) < 0)
-    return -1;
-  if (sigprocmask(SIG_SETMASK, &sigmask, NULL) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, a list of all
- * recognised adjustment methods
- * 
- * @return  Zero on success, -1 on error
- */
-static int list_methods(void)
-{
-  char** list;
-  size_t i;
-  
-  list = libcoopgamma_get_methods();
-  if (list == NULL)
-    return -1;
-  for (i = 0; list[i]; i++)
-    printf("%s\n", list[i]);
-  free(list);
-  if (fflush(stdout) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Print, to stdout, a list of all CRTC:s
- * 
- * A connection to the coopgamma server
- * must have been made
- * 
- * @return  Zero on success, -1 on error, -2
- *          on libcoopgamma error
- */
-static int list_crtcs(void)
-{
-  char** list;
-  size_t i;
-  
-  list = libcoopgamma_get_crtcs_sync(&cg);
-  if (list == NULL)
-    return -2;
-  for (i = 0; list[i]; i++)
-    printf("%s\n", list[i]);
-  free(list);
-  if (fflush(stdout) < 0)
-    return -1;
-  
-  return 0;
-}
-
-
-/**
- * Remove selected filters from selected CRTC:s
- * 
- * @param   crtcs    `NULL`-terminated list of CRTC names
- * @param   classes  `NULL`-terminated list of filter classes
- * @return           Zero on success, -1 on error, -2 on
- *                   libcoopgamma error
- */
-static int remove_filters(char* const* restrict crtcs, char* const* restrict classes)
-{
-  size_t n = 0, unsynced = 0, selected, i, j;
-  char* synced = NULL;
-  libcoopgamma_async_context_t* asyncs = NULL;
-  int saved_errno, need_flush = 0, ret = 0;
-  struct pollfd pollfd;
-  libcoopgamma_filter_t command;
-  
-  for (i = 0; crtcs[i] != NULL; i++);
-  for (j = 0; classes[j] != NULL; j++);
-  synced = calloc(i, j * sizeof(*synced));
-  if (synced == NULL)
-    goto fail;
-  asyncs = calloc(i, j * sizeof(*asyncs));
-  if (asyncs == NULL)
-    goto fail;
-  
-  i = j = 0;
-  command.lifespan = LIBCOOPGAMMA_REMOVE;
-  pollfd.fd = cg.fd;
-  pollfd.events = POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI;
-  
-  while ((unsynced > 0) || (crtcs[i] != NULL))
-    {
-    wait:
-      if (crtcs[i] != NULL)
-	pollfd.events |= POLLOUT;
-      else
-	pollfd.events &= ~POLLOUT;
-      
-      pollfd.revents = 0;
-      if (poll(&pollfd, (nfds_t)1, -1) < 0)
-	goto fail;
-      
-      if (pollfd.revents & (POLLOUT | POLLERR | POLLHUP | POLLNVAL))
-	{
-	  if (need_flush && (libcoopgamma_flush(&cg) < 0))
-	    goto send_fail;
-	  need_flush = 0;
-	  for (; crtcs[i] != NULL; i++, j = 0)
-	    {
-	      command.crtc = crtcs[i];
-	      while (classes[j] != NULL)
-		{
-		  command.class = classes[j++];
-		  if (unsynced++, libcoopgamma_set_gamma_send(&command, &cg, asyncs + n++) < 0)
-		    goto send_fail;
-		}
-	    }
-	  goto send_done;
-	send_fail:
-	  switch (errno)
-	    {
-	    case EINTR:
-	    case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
-	    case EWOULDBLOCK:
-#endif
-	      need_flush = 1;
-	      if (classes[j] == NULL)
-		i++, j = 0;
-	      break;
-	    default:
-	      goto fail;
-	    }
-	}
-    send_done:
-      
-      if ((unsynced == 0) && (crtcs[i] == NULL))
-	break;
-      
-      if (pollfd.revents & (POLLIN | POLLRDNORM | POLLRDBAND | POLLPRI))
-	while (unsynced > 0)
-	  switch (libcoopgamma_synchronise(&cg, asyncs, n, &selected))
-	    {
-	    case 0:
-	      if (synced[selected])
-		{
-		  libcoopgamma_skip_message(&cg);
-		  break;
-		}
-	      synced[selected] = 1;
-	      unsynced -= 1;
-	      if (libcoopgamma_set_gamma_recv(&cg, asyncs + selected) < 0)
-		goto cg_fail;
-	      break;
-	    default:
-	      switch (errno)
-		{
-		case 0:
-		  break;
-		case EINTR:
-		case EAGAIN:
-#if EAGAIN != EWOULDBLOCK
-		case EWOULDBLOCK:
-#endif
-		  goto wait;
-		default:
-		  goto fail;
-		}
-	      break;
-	    }
-    }
-  
- done:
-  saved_errno = errno;
-  free(synced);
-  free(asyncs);
-  errno = saved_errno;
-  return ret;
- fail:
-  ret = -1;
-  goto done;
- cg_fail:
-  ret = -2;
-  goto done;
-}
-
-
-/**
- * -M METHOD
- *     Select adjustment method. If METHOD is "?",
- *     available methods will be printed to stdout.
- * 
- * -S SITE
- *     Select site (display server instance).
- * 
- * -c CRTC
- *     Select CRT controller. If CRTC is "?", CRTC:s
- *     will be printed to stdout.
- *     
- *     Can be used multiple times. If not used, all
- *     CRTC:s are selected.
- * 
- * @param   argc  The number of command line arguments
- * @param   argv  The command line arguments
- * @return        0 on success, 1 on error
- */
-int main(int argc, char* argv[])
-{
-  int stage = 0;
-  int rc = 0;
-  char* method = NULL;
-  char* site = NULL;
-  char** crtcs_ = NULL;
-  char** crtcs = alloca(argc * sizeof(char*));
-  size_t i, crtcs_n = 0;
-  
-  ARGBEGIN
-    {
-    case 'M':
-      if (method != NULL)
-	usage();
-      method = EARGF(usage());
-      break;
-    case 'S':
-      if (site != NULL)
-	usage();
-      site = EARGF(usage());
-      break;
-    case 'c':
-      crtcs[crtcs_n++] = EARGF(usage());
-      break;
-    default:
-      usage();
-    }
-  ARGEND;
-  
-  if (initialise_proc() < 0)
-    goto fail;
-  
-  if ((method != NULL) && !strcmp(method, "?"))
-    {
-      if ((site != NULL) || (crtcs_n > 0) || (argc > 0))
-	usage();
-      if (list_methods() < 0)
-	goto fail;
-      return 0;
-    }
-  
-  if (libcoopgamma_context_initialise(&cg) < 0)
-    goto fail;
-  stage++;
-  if (libcoopgamma_connect(method, site, &cg) < 0)
-    {
-      fprintf(stderr, "%s: server failed to initialise\n", argv0);
-      goto custom_fail;
-    }
-  stage++;
-  
-  for (i = 0; i < crtcs_n; i++)
-    if (!strcmp(crtcs[i], "?"))
-      {
-	if (argc > 0)
-	  usage();
-	switch (list_crtcs())
-	  {
-	  case 0:
-	    goto done;
-	  case -1:
-	    goto fail;
-	  default:
-	    goto cg_fail;
-	  }
-      }
-  
-  if (argc == 0)
-    usage();
-  
-  if (crtcs_n == 0)
-    {
-      crtcs = crtcs_ = libcoopgamma_get_crtcs_sync(&cg);
-      if (crtcs == NULL)
-	goto cg_fail;
-    }
-  else
-    crtcs[crtcs_n] = NULL;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 1) < 0)
-    goto fail;
-  
-  switch (remove_filters(crtcs, argv))
-    {
-    case 0:
-      break;
-    case -1:
-      goto fail;
-    default:
-      goto cg_fail;
-    }
-  
- done:
-  if (stage >= 1)
-    libcoopgamma_context_destroy(&cg, stage >= 2);
-  free(crtcs_);
-  return rc;
-  
- custom_fail:
-  rc = 1;
-  goto done;
-  
- fail:
-  rc = 1;
-  perror(argv0);
-  goto done;
-  
- cg_fail:
-  rc = 1;
-  {
-    const char* side = cg.error.server_side ? "server" : "client";
-    if (cg.error.custom)
-      {
-	if ((cg.error.number != 0) || (cg.error.description != NULL))
-	  fprintf(stderr, "%s: %s-side error number %" PRIu64 ": %s\n",
-		  argv0, side, cg.error.number, cg.error.description);
-	else if (cg.error.number != 0)
-	  fprintf(stderr, "%s: %s-side error number %" PRIu64 "\n", argv0, side, cg.error.number);
-	else if (cg.error.description != NULL)
-	  fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description);
-      }
-    else if (cg.error.description != NULL)
-      fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, cg.error.description);
-    else
-      fprintf(stderr, "%s: %s-side error: %s\n", argv0, side, strerror(cg.error.number));
-  }
-  goto done;
-}
-
diff --git a/src/cg-shallow.c b/src/cg-shallow.c
deleted file mode 100644
index 230da88..0000000
--- a/src/cg-shallow.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#include <ctype.h>
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = -((int64_t)3 << 61);
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-shallow::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -d: keep process alive and remove filter on death
- */
-static int dflag = 0;
-
-/**
- * -x: remove filter rather than adding it
- */
-static int xflag = 0;
-
-/**
- * The emulated red resolution, 0 for unchanged.
- */
-static size_t rres = 2;
-
-/**
- * The emulated green resolution, 0 for unchanged.
- */
-static size_t gres = 2;
-
-/**
- * The emulated blue resolution, 0 for unchanged.
- */
-static size_t bres = 2;
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] "
-	  "(-x | [-p priority] [-d] [all | red green blue])\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'd':
-	if (dflag || xflag)
-	  usage();
-	dflag = 1;
-	break;
-      case 'x':
-	if (xflag || dflag)
-	  usage();
-	xflag = 1;
-	break;
-      default:
-	usage();
-      }
-  else
-    usage();
-  return 0;
-  (void) arg;
-}
-
-
-/**
- * Parse a non-negative integer encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_int(size_t* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  if (!isdigit(*str))
-    return -1;
-  *out = strtoul(str, &end, 10);
-  if (errno || *end)
-    return -1;
-  return 0;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  char* red = NULL;
-  char* green = NULL;
-  char* blue = NULL;
-  int q = xflag + (dflag | (argc > 0));
-  if ((q > 1) || (xflag && (prio != NULL)))
-    usage();
-  if (argc == 1)
-    red = green = blue = argv[0];
-  else if (argc == 3)
-    {
-      red   = argv[0];
-      green = argv[1];
-      blue  = argv[2];
-    }
-  else if (argc && !xflag)
-    usage();
-  if (argc)
-    {
-      if (parse_int(&rres, red) < 0)
-        usage();
-      if (parse_int(&gres, blue) < 0)
-        usage();
-      if (parse_int(&bres, green) < 0)
-        usage();
-    }
-  return 0;
-  (void) argv;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-	    libclut_lower_resolution(&(filter->ramps.MEMBER), MAX, TYPE, 0, rres, 0, gres, 0, bres);\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r;
-  size_t i, j;
-  
-  if (xflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_REMOVE;
-  else if (dflag)
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  else
-    for (i = 0; i < filters_n; i++)
-      crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_REMOVAL;
-  
-  if (!xflag)
-    if ((r = make_slaves()) < 0)
-      return r;
-  
-  for (i = 0, r = 1; i < filters_n; i++)
-    {
-      if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	continue;
-      if (!xflag)
-	fill_filter(&(crtc_updates[i].filter));
-      r = update_filter(i, 0);
-      if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	return r;
-      if (crtc_updates[i].slaves != NULL)
-	for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	  {
-	    r = update_filter(crtc_updates[i].slaves[j], 0);
-	    if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	      return r;
-	  }
-    }
-  
-  while (r != 1)
-    if ((r = synchronise(-1)) < 0)
-      return r;
-  
-  if (!dflag)
-    return 0;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return -1;
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      switch (errno)
-	{
-	case 0:
-	  break;
-	case ENOTRECOVERABLE:
-	  goto enotrecoverable;
-	default:
-	  return -1;
-	}
-  
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return -1;
-}
-
diff --git a/src/cg-sleepmode.c b/src/cg-sleepmode.c
deleted file mode 100644
index 3248d58..0000000
--- a/src/cg-sleepmode.c
+++ /dev/null
@@ -1,460 +0,0 @@
-/**
- * cg-tools -- Cooperative gamma-enabled tools
- * Copyright (C) 2016, 2018  Mattias Andrée (maandree@kth.se)
- * 
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- * 
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * 
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-#include "cg-base.h"
-
-#include <libclut.h>
-
-#if defined(_GNU_SOURCE)
-# undef _GNU_SOURCE
-#endif
-#include <errno.h>
-#include <sched.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <time.h>
-#include <unistd.h>
-
-
-
-/**
- * The default filter priority for the program
- */
-const int64_t default_priority = (int64_t)3 << 59;
-
-/**
- * The default class for the program
- */
-char default_class[] = PKGNAME "::cg-sleepmode::standard";
-
-/**
- * Class suffixes
- */
-const char* const* class_suffixes = (const char* const[]){NULL};
-
-
-
-/**
- * -r: fade-out time for the red channel
- */
-static char* rflag;
-
-/**
- * -g: fade-out time for the green channel
- */
-static char* gflag;
-
-/**
- * -b: fade-out time for the blue channel
- */
-static char* bflag;
-
-/**
- * The duration, in seconds, of the red channel's fade out
- */
-static double red_time = 3;
-
-/**
- * The duration, in seconds, of the green channel's fade out
- */
-static double green_time = 2;
-
-/**
- * The duration, in seconds, of the blue channel's fade out
- */
-static double blue_time = 1;
-
-/**
- * The luminosity of red channel after the fade out
- */
-static double red_target = 0.5;
-
-/**
- * The luminosity of green channel after the fade out
- */
-static double green_target = 0;
-
-/**
- * The luminosity of blue channel after the fade out
- */
-static double blue_target = 0;
-
-/**
- * Time to fade in?
- */
-static volatile sig_atomic_t received_int = 0;
-
-
-
-/**
- * Print usage information and exit
- */
-void usage(void)
-{
-  fprintf(stderr,
-	  "Usage: %s [-M method] [-S site] [-c crtc]... [-R rule] [-p priority] "
-	  "[-r red-fadeout-time] [-g green-fadeout-time] [-b blue-fadeout-time] "
-	  "[red-luminosity [green-luminosity [blue-luminosity]]]\n",
-	  argv0);
-  exit(1);
-}
-
-
-/**
- * Called when a signal is received
- * that tells the program to terminate
- * 
- * @param  signo  The received signal
- */
-static void sig_int(int signo)
-{
-  received_int = 1;
-  (void) signo;
-}
-
-
-/**
- * Handle a command line option
- * 
- * @param   opt  The option, it is a NUL-terminate two-character
- *               string starting with either '-' or '+', if the
- *               argument is not recognised, call `usage`. This
- *               string will not be "-M", "-S", "-c", "-p", or "-R".
- * @param   arg  The argument associated with `opt`,
- *               `NULL` there is no next argument, if this
- *               parameter is `NULL` but needed, call `usage`
- * @return       0 if `arg` was not used,
- *               1 if `arg` was used,
- *               -1 on error
- */
-int handle_opt(char* opt, char* arg)
-{
-  if (opt[0] == '-')
-    switch (opt[1])
-      {
-      case 'r':
-	if (rflag || !(rflag = arg))
-	  usage();
-	return 1;
-      case 'g':
-	if (gflag || !(gflag = arg))
-	  usage();
-	return 1;
-      case 'b':
-	if (bflag || !(bflag = arg))
-	  usage();
-	return 1;
-      default:
-	usage();
-      }
-  else
-    usage();
-  return 0;
-}
-
-
-/**
- * Parse a non-negative double encoded as a string
- * 
- * @param   out  Output parameter for the value
- * @param   str  The string
- * @return       Zero on success, -1 if the string is invalid
- */
-static int parse_double(double* restrict out, const char* restrict str)
-{
-  char* end;
-  errno = 0;
-  *out = strtod(str, &end);
-  if (errno || (*out < 0) || isinf(*out) || isnan(*out) || *end)
-    return -1;
-  if (!*str || !strchr("0123456789.", *str))
-    return -1;
-  return 0;
-}
-
-
-/**
- * This function is called after the last
- * call to `handle_opt`
- * 
- * @param   argc  The number of unparsed arguments
- * @param   argv  `NULL` terminated list of unparsed arguments
- * @param   prio  The argument associated with the "-p" option
- * @return        Zero on success, -1 on error
- */
-int handle_args(int argc, char* argv[], char* prio)
-{
-  int q = (rflag || gflag || bflag || argc);
-  if ((q > 1) || (argc > 3))
-    usage();
-  if (rflag != NULL)
-    if (parse_double(&red_time, rflag) < 0)
-      usage();
-  if (gflag != NULL)
-    if (parse_double(&green_time, gflag) < 0)
-      usage();
-  if (bflag != NULL)
-    if (parse_double(&blue_time, bflag) < 0)
-      usage();
-  if (argc >= 1)
-    if (parse_double(&red_target, argv[0]) < 0)
-      usage();
-  if (argc >= 2)
-    if (parse_double(&green_target, argv[1]) < 0)
-      usage();
-  if (argc >= 3)
-    if (parse_double(&blue_target, argv[2]) < 0)
-      usage();
-  if (red_target >= 1)
-    red_time = 0;
-  if (green_target >= 1)
-    green_time = 0;
-  if (blue_target >= 1)
-    blue_time = 0;
-  return 0;
-  (void) prio;
-}
-
-
-/**
- * Fill a filter
- * 
- * @param  filter  The filter to fill
- * @param  red     The red brightness
- * @param  green   The green brightness
- * @param  blue    The blue brightness
- */
-static void fill_filter(libcoopgamma_filter_t* restrict filter, double red, double green, double blue)
-{
-  switch (filter->depth)
-    {
-#define X(CONST, MEMBER, MAX, TYPE)\
-    case CONST:\
-      libclut_start_over(&(filter->ramps.MEMBER), MAX, TYPE, 1, 1, 1);\
-      libclut_rgb_brightness(&(filter->ramps.MEMBER), MAX, TYPE, red, green, blue);\
-      break;
-LIST_DEPTHS
-#undef X
-    default:
-      abort();
-    }
-}
-
-
-/**
- * Get the current monotonic time as a double
- * 
- * @param   now  Output parameter for the current time (monotonic)
- * @return       Zero on success, -1 on error
- */
-static int double_time(double* restrict now)
-{
-#ifndef CLOCK_MONOTONIC_RAW
-# define CLOCK_MONOTONIC_RAW  CLOCK_MONOTONIC
-#endif
-  struct timespec ts;
-  if (clock_gettime(CLOCK_MONOTONIC_RAW, &ts) < 0)
-    return -1;
-  *now  = (double)(ts.tv_nsec);
-  *now /= 1000000000L;
-  *now += (double)(ts.tv_sec);
-  return 0;
-}
-
-
-/**
- * The main function for the program-specific code
- * 
- * @return  0: Success
- *          -1: Error, `errno` set
- *          -2: Error, `cg.error` set
- *          -3: Error, message already printed
- */
-int start(void)
-{
-  int r, fade_red, fade_green, fade_blue;
-  size_t i, j;
-  double t, starttime, red, green, blue, redt, greent, bluet;
-  
-  redt   = (red_target   - 1) / red_time;
-  greent = (green_target - 1) / green_time;
-  bluet  = (blue_target  - 1) / blue_time;
-  fade_red   = !isinf(redt)   && !isnan(redt);
-  fade_green = !isinf(greent) && !isnan(greent);
-  fade_blue  = !isinf(bluet)  && !isnan(bluet);
-  
-  for (i = 0; i < filters_n; i++)
-    crtc_updates[i].filter.lifespan = LIBCOOPGAMMA_UNTIL_DEATH;
-  
-  if ((r = make_slaves()) < 0)
-    return r;
-  
-  if ((r = double_time(&starttime)) < 0)
-    return r;
-  
-  red   = red_target   < 0 ? 0 : red_target   > 1 ? 1 : red_target;
-  green = green_target < 0 ? 0 : green_target > 1 ? 1 : green_target;
-  blue  = blue_target  < 0 ? 0 : blue_target  > 1 ? 1 : blue_target;
-  
-  for (;;)
-    {
-      if ((r = double_time(&t)) < 0)
-	return r;
-      t -= starttime;
-      if (fade_red)
-	{if (red   = 1 + t * redt,   red   > 1)  red   = 1;  else if (red   < 0)  red   = 0;}
-      if (fade_green)
-	{if (green = 1 + t * greent, green > 1)  green = 1;  else if (green < 0)  green = 0;}
-      if (fade_blue)
-	{if (blue  = 1 + t * bluet,  blue  > 1)  blue  = 1;  else if (blue  < 0)  blue  = 0;}
-      
-      for (i = 0, r = 1; i < filters_n; i++)
-	{
-	  if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	    continue;
-	  fill_filter(&(crtc_updates[i].filter), red, green, blue);
-	  r = update_filter(i, 0);
-	  if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	    return r;
-	  if (crtc_updates[i].slaves != NULL)
-	    for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	      {
-		r = update_filter(crtc_updates[i].slaves[j], 0);
-		if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		  return r;
-	      }
-	}
-      
-      while (r != 1)
-	if ((r = synchronise(-1)) < 0)
-	  return r;
-      
-      sched_yield();
-      
-      if ((t >= red_time) && (t >= green_time) && (t >= blue_time))
-	break;
-    }
-  
-  if ((signal(SIGINT,  sig_int) == SIG_ERR) ||
-      (signal(SIGTERM, sig_int) == SIG_ERR) ||
-      (signal(SIGHUP,  sig_int) == SIG_ERR))
-    return -1;
-  
-  if (libcoopgamma_set_nonblocking(&cg, 0) < 0)
-    return -1;
-  for (;;)
-    if (libcoopgamma_synchronise(&cg, NULL, 0, &j) < 0)
-      {
-	if (received_int)
-	  goto fade_in;
-	switch (errno)
-	  {
-	  case 0:
-	    break;
-	  case ENOTRECOVERABLE:
-	    goto enotrecoverable;
-	  default:
-	    return 1;
-	  }
-      }
-  
- fade_in:
-  if (libcoopgamma_set_nonblocking(&cg, 1) < 0)
-    return -1;
-  
-  t = red_time;
-  t = t > green_time ? t : green_time;
-  t = t > blue_time  ? t : blue_time;
-  redt   = t - red_time;
-  greent = t - green_time;
-  bluet  = t - blue_time;
-  t = red_time + green_time + blue_time;
-  if (red_time > 0)
-    t = t < red_time   ? t : red_time;
-  if (green_time > 0)
-    t = t < green_time ? t : green_time;
-  if (blue_time > 0)
-    t = t < blue_time  ? t : blue_time;
-  red_time   = t + redt;
-  green_time = t + greent;
-  blue_time  = t + bluet;
-  
-  red = green = blue = 1;
-  
-  if ((r = double_time(&starttime)) < 0)
-    return r;
-  
-  for (;;)
-    {
-      if ((r = double_time(&t)) < 0)
-	return r;
-      t -= starttime;
-      redt   = t / red_time;
-      greent = t / green_time;
-      bluet  = t / blue_time;
-      if (!isinf(redt) && !isnan(redt))
-	{
-	  red = red_target * (1 - redt) + redt;
-	  if (red > 1)  red = 1;  else if (red < 0)  red = 0;
-	}
-      if (!isinf(greent) && !isnan(greent))
-	{
-	  green = green_target * (1 - greent) + greent;
-	  if (green > 1)  green = 1;  else if (green < 0)  green = 0;
-	}
-      if (!isinf(bluet) && !isnan(bluet))
-	{
-	  blue = blue_target * (1 - bluet) + bluet;
-	  if (blue > 1)  blue = 1;  else if (blue < 0)  blue = 0;
-	}
-      
-      for (i = 0, r = 1; i < filters_n; i++)
-	{
-	  if (!(crtc_updates[i].master) || !(crtc_info[crtc_updates[i].crtc].supported))
-	    continue;
-	  fill_filter(&(crtc_updates[i].filter), red, green, blue);
-	  r = update_filter(i, 0);
-	  if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-	    return r;
-	  if (crtc_updates[i].slaves != NULL)
-	    for (j = 0; crtc_updates[i].slaves[j] != 0; j++)
-	      {
-		r = update_filter(crtc_updates[i].slaves[j], 0);
-		if ((r == -2) || ((r == -1) && (errno != EAGAIN)))
-		  return r;
-	      }
-	}
-      
-      while (r != 1)
-	if ((r = synchronise(-1)) < 0)
-	  return r;
-      
-      sched_yield();
-      
-      if ((t >= red_time) && (t >= green_time) && (t >= blue_time))
-	break;
-    }
-  
-  return 0;
- enotrecoverable:
-  for (;;)
-    if (pause() < 0)
-      return -1;
-}
-