/**
* 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/>.
*/
#define _DEFAULT_SOURCE
#define _BSD_SOURCE
#include "cg-base.h"
#include <alloca.h>
#include <errno.h>
#include <inttypes.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;
/**
* 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;
/**
* 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 libcoopgamma error
*/
static int get_crtc_info(void)
{
/* TODO */
return 0;
}
/**
* -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.
*
* @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 init_failed = 0;
int stage = 0;
int dealloc_crtcs = 0;
int rc = 0;
char* method = NULL;
char* site = NULL;
size_t crtcs_i = 0;
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 + 1;
if ((at_end = !*arg))
arg = argv[1];
if (!strcmp(opt, "-m"))
{
if ((method = arg) == NULL)
usage();
}
else if (!strcmp(opt, "-s"))
{
if ((site = arg) == NULL)
usage();
}
else if (!strcmp(opt, "-c"))
{
if (arg == NULL)
usage();
crtcs[crtcs_i++] = arg;
}
else
switch (handle_opt(opt, arg))
{
case 0:
goto next_arg;
case 1:
break;
default:
goto fail;
}
argv += at_end;
argc -= at_end;
goto next_arg;
}
next_arg:;
}
crtcs_n = crtcs_i;
crtcs[crtcs_i] = NULL;
if (handle_args(argc, argv, method, site, crtcs) < 0)
goto fail;
if ((method != NULL) && !strcmp(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)
{
init_failed = (errno == 0);
goto fail;
}
stage++;
while (crtcs_i--)
if (!strcmp(crtcs[crtcs_i], "?"))
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++);
}
crtc_info = calloc(crtcs_n + 1, sizeof(*crtc_info));
if (crtc_info == NULL)
goto fail;
for (crtcs_i = 0; crtcs_i < crtcs_n; crtcs_i++)
if (libcoopgamma_crtc_info_initialise(crtc_info + crtcs_i) < 0)
goto cg_fail;
if (get_crtc_info() < 0)
goto cg_fail;
/* TODO start */
done:
if (dealloc_crtcs)
free(crtcs);
if (crtc_info != NULL)
for (crtcs_i = 0; crtcs_i < crtcs_n; crtcs_i++)
libcoopgamma_crtc_info_destroy(crtc_info + crtcs_i);
free(crtc_info);
if (stage >= 1)
libcoopgamma_context_destroy(&cg, stage >= 2);
return rc;
fail:
rc = 1;
if (init_failed)
fprintf(stderr, "%s: server failed to initialise\n", argv0);
else
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;
}
