From a2f3b7bc25c659542b20c5b252324cf8477f05a3 Mon Sep 17 00:00:00 2001
From: Mattias Andrée <maandree@kth.se>
Date: Thu, 12 Oct 2017 22:37:49 +0200
Subject: Rewrite with style (and relicense)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
Signed-off-by: Mattias Andrée <maandree@kth.se>
---
src/adjbacklight.auto-completion | 17 -
src/adjbacklight.c | 872 ---------------------------------------
2 files changed, 889 deletions(-)
delete mode 100644 src/adjbacklight.auto-completion
delete mode 100644 src/adjbacklight.c
(limited to 'src')
diff --git a/src/adjbacklight.auto-completion b/src/adjbacklight.auto-completion
deleted file mode 100644
index a06884f..0000000
--- a/src/adjbacklight.auto-completion
+++ /dev/null
@@ -1,17 +0,0 @@
-(adjbacklight
- (unargumented (options -c --copyright --copying) (complete --copying)
- (desc 'Display copyright information'))
-
- (unargumented (options -w --warranty) (complete --warranty)
- (desc 'Display warranty disclaimer'))
-
- (unargumented (options -a --all) (complete --all)
- (desc 'Run for all devices, including ACPI devices'))
-
- (unargumented (options -g --get) (complete --get)
- (desc 'Get average brightness on devices'))
-
- (argumented (options -s --set) (complete --set) (files 'LEVEL[%]') (files -0)
- (desc 'Set brightness on devices'))
-)
-
diff --git a/src/adjbacklight.c b/src/adjbacklight.c
deleted file mode 100644
index 455fb70..0000000
--- a/src/adjbacklight.c
+++ /dev/null
@@ -1,872 +0,0 @@
-/**
- * adjbacklight – Convenient method for adjusting the backlight on your portable computer
- *
- * Copyright © 2012, 2013, 2014, 2015 Mattias Andrée (maandree@member.fsf.org)
- *
- * 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 <stdlib.h>
-#include <stdio.h>
-#include <termios.h>
-#include <sys/ioctl.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <string.h>
-#include <limits.h>
-#include <alloca.h>
-#include <grp.h>
-#include <pwd.h>
-
-
-
-#ifndef PATH_MAX
-#warning PATH_MAX is not defined
-#define PATH_MAX 4096
-#endif
-
-
-
-/**
- * The years this software has been developed
- */
-#define _YEARS_ "2012, 2013, 2014"
-
-
-/**
- * Forking method
- */
-#ifndef FORK
-#define FORK fork
-#endif
-
-
-/**
- * The directory where the backlight devices are found and configured
- */
-#ifndef BACKLIGHT_DIR
-#define BACKLIGHT_DIR "/sys/class/backlight"
-#endif
-
-
-/**
- * Print a line to stdout
- *
- * @param S:const char* The string to print
- */
-#define P(S) printf("%s", S "\n")
-
-
-/**
- * Cut a string of at the first line break
- * A help `int` named `i` must be available
- *
- * @param data:char* The string, it will be modified
- * @return :char* The input string, it has been modified
- */
-#define unnl(data) \
- ({ \
- for (i = 0; *(data + i); i++) \
- if (*(data + i) == '\n') \
- *(data + i) = 0; \
- data; \
- })
-
-
-
-/**
- * Test whether a string numerical and with at most two trailing '%'
- *
- * @param str The string
- * @return Whether the test passed
- */
-static int isnumerical(const char* str);
-
-/**
- * Interactively adjust the backlight on a device
- *
- * @param cols The number of columns on the terminal
- * @param device The device on which to adjust backlight
- */
-static void adjust(int cols, const char* device);
-
-/**
- * Gets the current backlight setting on a device
- *
- * @param device The device from which to get backlight
- * @return The brightness as a [0; 1] float, negative on error
- */
-static float getbrightness(const char* device);
-
-/**
- * Sets the current backlight setting on a device
- *
- * @param device The device from which to get backlight
- * @param adjustment The adjustment to make
- */
-static void setbrightness(const char* device, const char* adjustment);
-
-/**
- * Read a file
- *
- * @param output Buffer to store the file's content in
- * @param file The file to read
- * @return Zero on success, non-zero on failure
- */
-static int readfile(char* output, const char* file);
-
-/**
- * Write an integer to a file
- *
- * @param buffer Buffer for temporary data
- * @param integer The integer to write
- * @param file The file to which to write
- * @return Zero on success, non-zero on failure
- */
-static int writefile(char* buffer, int integer, const char* file);
-
-/**
- * Print the status
- *
- * @param min The minimum possible brightness
- * @param max The maximum possible brightness
- * @param init The brightness used when the program started
- * @param cur The current brightness
- * @param cols The number of columns on the terminal
- */
-static void bars(int min, int max, int init, int cur, int cols);
-
-
-
-/**
- * A series of spaces used to print the bar
- */
-static char* space;
-
-/**
- * A series of vertical lines used to print the bar
- */
-static char* line;
-
-
-
-/**
- * This is the mane entry point of the program
- *
- * @param argc The number of elements in `argv`
- * @parma argv Command line arguments, including the command
- * @return Exit value, zero on success
- */
-int main(int argc, char** argv)
-{
- struct winsize win;
- struct termios saved_stty;
- struct termios stty;
- size_t i, ndevices = 0;
- pid_t pid = 0;
- char* set = NULL;
- int j, get = 0, help = 0, all = 0, cols = 80;
- char** devices = alloca((size_t)argc * sizeof(char*));
-
-
- if (argc > 1)
- {
- char* arg;
- for (i = 1; i < (size_t)argc; i++)
- {
- #define T(S) (!strcmp(arg, S))
- arg = *(argv + i);
- if (T("-h") || T("--help"))
- help = 1;
- else if (T("-a") || T("--all"))
- all = 1;
- else if (T("-c") || T("--copyright") || T("--copying"))
- {
- P("\n");
- P("adjbacklight – Convenient method for adjusting the backlight on your portable computer");
- P("");
- P("Copyright © " _YEARS_ " Mattias Andrée (maandree@member.fsf.org)");
- P("");
- P("This program is free software: you can redistribute it and/or modify");
- P("it under the terms of the GNU General Public License as published by");
- P("the Free Software Foundation, either version 3 of the License, or");
- P("(at your option) any later version.");
- P("");
- P("This program is distributed in the hope that it will be useful,");
- P("but WITHOUT ANY WARRANTY; without even the implied warranty of");
- P("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
- P("GNU General Public License for more details.");
- P("");
- P("You should have received a copy of the GNU General Public License");
- P("along with this program. If not, see <http://www.gnu.org/licenses/>.");
- P("\n");
- return 0;
- }
- else if (T("-w") || T("--warranty"))
- {
- P("\n");
- P("This program is distributed in the hope that it will be useful,");
- P("but WITHOUT ANY WARRANTY; without even the implied warranty of");
- P("MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
- P("GNU General Public License for more details.");
- P("\n");
- return 0;
- }
- else if (T("-s") || T("--set"))
- {
- char* tmp;
- if (i + 1 == (size_t)argc)
- fprintf(stderr, "%s: argument for option %s is missing, ignoring option\n", *argv, arg);
- else
- if (!isnumerical(tmp = *(argv + ++i)))
- fprintf(stderr, "%s: argument for option %s is malformated, ignoring option\n", *argv, arg);
- else
- {
- set = tmp;
- get = 0;
- }
- }
- else if (T("-g") || T("--get"))
- {
- get = 1;
- set = NULL;
- }
- else if (((*arg == '-') || (*arg == '+') || (*arg == '=')) && isnumerical(arg + 1))
- {
- set = arg;
- get = 0;
- }
- else
- {
- if (*arg && (*arg != '-'))
- *(devices + ndevices++) = arg;
- else
- fprintf(stderr, "%s: ignoring unrecognised argument: %s\n", *argv, arg);
- }
- #undef T
- }
- fflush(stderr);
- if (help || (((size_t)all + ndevices + (size_t)get == 0) && !set))
- {
- P("\n");
- P("adjbacklight - Convenient method for adjusting the backlight on your portable computer");
- P("");
- P("USAGE: adjbacklight (-c | -w | [-g | -s LEVEL | LEVEL] [-a | DEVICE...])");
- P("");
- P("Run with options to adjust the backlight on your monitors.");
- P("");
- P("");
- P("OPTIONS:");
- P("");
- P("-c");
- P("--copyright");
- P("--copying Display copyright information");
- P("");
- P("-w");
- P("--warranty Display warranty disclaimer");
- P("");
- P("-a");
- P("--all Run for all devices, including ACPI devices");
- P("");
- P("-g");
- P("--get Get average brightness on devices");
- P("");
- P("-s");
- P("--set LEVEL[%] Set brightness on devices");
- P("");
- P("+LEVEL Increase brightness on devices by actual value");
- P("-LEVEL Decrease brightness on devices by actual value");
- P("=LEVEL Set brightness on devices by actual value");
- P("");
- P("+LEVEL% Increase brightness on devices by percentage-points");
- P("-LEVEL% Decrease brightness on devices by percentage-points");
- P("=LEVEL% Set brightness on devices by percentage-points");
- P("");
- P("+LEVEL%% Increase brightness on devices by percentage");
- P("-LEVEL%% Decrease brightness on devices by percentage");
- P("=LEVEL%% Set brightness on devices by percentage");
- P("");
- P("");
- P("KEYBOARD:");
- P("");
- P("←");
- P("↓ Darken the screen");
- P("");
- P("→");
- P("↑ Brighten the screen");
- P("");
- P("q");
- P("enter");
- P("C-d Continue to next controller, or if at last, quit");
- P("");
- P("");
- P("");
- P("Copyright © " _YEARS_ " Mattias Andrée (maandree@member.fsf.org)");
- P("");
- P("This program is free software: you can redistribute it and/or modify");
- P("it under the terms of the GNU General Public License as published by");
- P("the Free Software Foundation, either version 3 of the License, or");
- P("(at your option) any later version.");
- P("");
- return 0;
- }
- }
-
-
- /* Check permissions */
- if (getuid()) /* Always accept root */
- {
- struct group* video_grp = getgrnam("video");
- if (video_grp) /* Accept everypony if the group ‘video’ does not exist */
- {
- struct passwd* realuser = getpwuid(getuid());
- char** mems;
- char* realname;
- int ok;
- if (!realuser)
- {
- P("You do not exist, go away!");
- return 1;
- }
- mems = video_grp->gr_mem;
- realname = realuser->pw_name;
- ok = 0;
- for (; *mems; mems++)
- if (!strcmp(realname, *mems))
- {
- ok = 1;
- break;
- }
- endgrent();
- if (!ok)
- {
- P("Sorry, you need to be in the group 'video'.");
- return 1;
- }
- }
- endpwent();
- }
-
-
- if (!get && !set)
- {
- P("\n");
- P("If the program is abnormally aborted the may be some residual");
- P("effects on the terminal. the following commands should reset it:");
- P("");
- P(" stty icanon echo");
- P(" echo -en '\\e[?25h'");
- P("");
- P("\n\n\n");
- }
-
-
- if (!get && !set)
- {
- /* Get the size of the terminal */
- if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1)
- perror(*argv);
- else
- cols = win.ws_col;
-
- /* Hide cursor */
- printf("%s", "\033[?25l");
- fflush(stdout);
-
- /* stty -icanon -echo */
- if (tcgetattr(STDIN_FILENO, &stty))
- {
- perror(*argv);
- return 1;
- }
- saved_stty = stty;
- stty.c_lflag &= (tcflag_t)~(ICANON | ECHO);
- if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &stty))
- {
- perror(*argv);
- return 1;
- }
- }
-
-
- /* Fork to diminish risk of unclean exit */
- if (!get && !set)
- {
- pid = FORK();
- if (pid == (pid_t)-1)
- {
- perror(*argv);
- pid = 0;
- }
- }
-
- if (pid)
- waitpid(pid, NULL, 0);
- else
- {
- float brightness = 0;
- int nbrightness = 0;
-
- if (!get && !set)
- {
- line = malloc((size_t)cols * 3 * sizeof(char));
- space = malloc((size_t)cols * sizeof(char));
- for (i = 0; i < (size_t)cols; i++)
- {
- *(line + i * 3 + 0) = (char)(0xE2);
- *(line + i * 3 + 1) = (char)(0x94);
- *(line + i * 3 + 2) = (char)(0x80);
- *(space + i) = ' ';
- }
- *(space + cols - 1) = 0;
- *(line + (cols - 2) * 3) = 0;
- }
-
- if (ndevices)
- {
- char* device;
- for (i = 0; i < ndevices; i++)
- {
- device = *(devices + i);
- for (j = 0; *(device + j); j++)
- if (*(device + j) == '/')
- {
- device += j + 1;
- j = -1;
- }
- if (get)
- {
- float value = getbrightness(device);
- if (value >= 0.f)
- {
- brightness += value;
- nbrightness++;
- }
- }
- else if (set)
- setbrightness(device, set);
- else
- adjust(cols, device);
- }
- }
- else
- {
- struct dirent* ent;
- DIR* dir = opendir(BACKLIGHT_DIR);
- if (dir)
- {
- char* device;
- while ((ent = readdir(dir)))
- {
- device = ent->d_name;
- if (all || (strstr(device, "acpi_video") != device))
- if (*device && (*device != '.'))
- {
- if (get)
- {
- float value = getbrightness(device);
- if (value >= 0.f)
- {
- brightness += value;
- nbrightness++;
- }
- }
- else if (set)
- setbrightness(device, set);
- else
- adjust(cols, device);
- }
- }
- closedir(dir);
- }
- }
-
- if (!get && !set)
- {
- free(line);
- free(space);
- }
- else if (get)
- {
- if (nbrightness)
- {
- brightness *= 100.f;
- brightness /= (float)nbrightness;
- printf("%.2f%%\n", (double)brightness);
- fflush(stdout);
- }
- else
- {
- printf("%s\n", "100.00%");
- fflush(stdout);
- }
- }
- }
-
-
- if (!get && !set)
- {
- /* `stty icanon echo` */
- if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_stty))
- {
- perror(*argv);
- return 1;
- }
-
- /* Show cursor */
- printf("%s", "\033[?25h");
- fflush(stdout);
- }
-
- return 0;
-}
-
-
-/**
- * Test whether a string numerical and with at most two trailing '%'
- *
- * @param str The string
- * @return Whether the test passed
- */
-static int isnumerical(const char* str)
-{
- int p = 0, d = 0;
- if ((*str == 0) || (*str == '%'))
- return 0;
- for (; *str; str++)
- {
- switch (*str)
- {
- case '.':
- if (d++)
- return 0;
- /* fall through */
- case '0' ... '9':
- if (p)
- return 0;
- break;
-
- case '%':
- p++;
- break;
-
- default:
- return 0;
- }
- }
- return p <= 2;
-}
-
-
-/**
- * Interactively adjust the backlight on a device
- *
- * @param cols The number of columns on the terminal
- * @param device The device on which to adjust backlight
- */
-static void adjust(int cols, const char* device)
-{
- int min, max, cur, step, init, i, d;
- size_t lendir;
- char* dir = alloca(PATH_MAX * sizeof(char));
- char* buf = alloca(256 * sizeof(char));
-
- *dir = 0;
- dir = strcat(dir, BACKLIGHT_DIR "/");
- dir = strcat(dir, device);
- dir = strcat(dir, "/");
- lendir = strlen(dir);
-
- /* Get brightness parameters */
- min = 0;
- if (readfile(buf, strcat(dir, "max_brightness")))
- return;
- max = atoi(unnl(buf));
- *(dir + lendir) = 0;
- if (readfile(buf, strcat(dir, "brightness")))
- return;
- cur = atoi(unnl(buf));
-
- if (max <= min)
- return; /* what the buck */
-
- step = (max - min) / 200 ?: 1;
- init = cur;
-
- P("\n\n\n\n\n");
- bars(min, max, init, cur, cols);
-
- while ((d = getchar()) != -1)
- switch (d)
- {
- case 'q':
- case '\n':
- case 4:
- P("");
- return;
-
- case 'A':
- case 'C':
- cur += step << 1;
- /* fall through */
- case 'B':
- case 'D':
- cur -= step;
- if (cur < min) cur = min;
- if (cur > max) cur = max;
- if (writefile(buf, cur, dir))
- return;
- bars(min, max, init, cur, cols);
- }
-}
-
-
-
-/**
- * Gets the current backlight setting on a device
- *
- * @param device The device from which to get backlight
- * @return The brightness as a [0; 1] float, negative on error
- */
-static float getbrightness(const char* device)
-{
- int min, max, cur, i;
- size_t lendir;
- char* dir = alloca(PATH_MAX * sizeof(char));
- char* buf = alloca(256);
-
- *dir = 0;
- dir = strcat(dir, BACKLIGHT_DIR "/");
- dir = strcat(dir, device);
- dir = strcat(dir, "/");
- lendir = strlen(dir);
-
- /* Get brightness parameters */
- min = 0;
- if (readfile(buf, strcat(dir, "max_brightness")))
- return -1.f;
- max = atoi(unnl(buf));
- *(dir + lendir) = 0;
- if (readfile(buf, strcat(dir, "brightness")))
- return -1.f;
- cur = atoi(unnl(buf));
-
- if (max <= min)
- return -1.f; /* what the buck */
-
- return (float)cur / (float)(max - min);
-}
-
-
-
-/**
- * Sets the current backlight setting on a device
- *
- * @param device The device from which to get backlight
- * @param adjustment The adjustment to make
- */
-static void setbrightness(const char* device, const char* adjustment)
-{
- int min, max, cur, i, adj;
- size_t lendir;
- char* dir = alloca(PATH_MAX * sizeof(char));
- char* buf = alloca(256);
- int act = 0, integer = 0, decimal = 0, p = 0, d = 0;
-
- *dir = 0;
- dir = strcat(dir, BACKLIGHT_DIR "/");
- dir = strcat(dir, device);
- dir = strcat(dir, "/");
- lendir = strlen(dir);
-
- /* Get brightness parameters */
- min = 0;
- if (readfile(buf, strcat(dir, "max_brightness")))
- return;
- max = atoi(unnl(buf));
- *(dir + lendir) = 0;
- if (readfile(buf, strcat(dir, "brightness")))
- return;
- cur = atoi(unnl(buf));
-
- if (max <= min)
- return; /* what the buck */
-
- /* Read -/+/= head */
- if (*adjustment == '-')
- act = -1;
- else if (*adjustment == '+')
- act = 1;
- else if (*adjustment != '=')
- adjustment--;
- adjustment++;
-
- /* Parse numerical part */
- for (; *adjustment && (*adjustment != '%'); adjustment++)
- if (*adjustment == '.')
- d = 1;
- else if (d)
- {
- if ((long long)d * 10 > (long long)INT_MAX)
- continue;
- if ((long long)decimal * 10 + 9 > (long long)INT_MAX)
- continue;
- d *= 10;
- decimal *= 10;
- decimal += (*adjustment) - '0';
- }
- else
- {
- integer *= 10;
- integer += (*adjustment) - '0';
- }
- if (!d)
- d = 1;
-
- /* Count number of p:s */
- while (*adjustment++)
- p++;
-
- /* Calculate value to send */
- if (p == 0)
- adj = integer + (int)((double)decimal / (double)d + 0.5d);
- else if (p == 1)
- adj = (int)(((double)integer + (double)decimal / (double)d) * (double)(max - min) / 100.d);
- else
- adj = (int)(((double)integer + (double)decimal / (double)d) * (double)cur / 100.d);
- adj = (act & 1) * cur + (act | 1) * adj;
- if (adj < min) adj = min;
- if (adj > max) adj = max;
-
- /* Send value */
- writefile(buf, adj, dir);
-}
-
-
-
-/**
- * Read a file
- *
- * @param output Buffer to store the file's content in
- * @param file The file to read
- * @return Zero on success, non-zero on failure
- */
-static int readfile(char* output, const char* file)
-{
- #define BLOCK_SIZE 256 /* We will not even encounter that much */
- FILE* f;
- size_t got, have = 0;
- int ended = 0;
-
- if ((f = fopen(file, "r")) == NULL)
- {
- perror(file);
- return -1;
- }
-
- while (!ended)
- {
- got = fread(output + have, 1, BLOCK_SIZE, f);
- if (got != BLOCK_SIZE)
- {
- ended = feof(f);
- have += got;
- clearerr(f);
- fclose(f);
- if (!ended)
- {
- perror(file);
- return -1;
- }
- }
- else
- have += got;
- }
-
- *(output + have) = 0;
- return 0;
-}
-
-
-
-/**
- * Write an integer to a file
- *
- * @param buffer Buffer for temporary data
- * @param integer The integer to write
- * @param file The file to which to write
- * @return Zero on success, non-zero on failure
- */
-static int writefile(char* buffer, int integer, const char* file)
-{
- FILE* f;
- size_t n = 0;
-
- buffer += 32;
- do
- {
- *(buffer - n++) = (char)((integer % 10) + '0');
- integer /= 10;
- }
- while (integer);
- buffer -= n - 1;
- *(buffer + n++) = '\n';
-
- if ((f = fopen(file, "w")) == NULL)
- {
- perror(file);
- return -1;
- }
-
- if (fwrite(buffer, 1, n, f) != n)
- {
- perror(file);
- fclose(f);
- return -1;
- }
-
- fflush(f);
- fclose(f);
- return 0;
-}
-
-
-
-/**
- * Print the status
- *
- * @param min The minimum possible brightness
- * @param max The maximum possible brightness
- * @param init The brightness used when the program started
- * @param cur The current brightness
- * @param cols The number of columns on the terminal
- */
-static void bars(int min, int max, int init, int cur, int cols)
-{
- int mid = (int)((float)(cur - min) * (float)(cols - 2) / (float)(max - min) + 0.5f);
-
- printf("\033[1000D\033[6A");
- printf("\033[2K┌%s┐\n", line);
- *(space + mid) = 0;
- printf("\033[2K│\033[47m%s\033[49m%s│\n", space, space + mid + 1);
- *(space + mid) = ' ';
- printf("\033[2K└%s┘\n", line);
- printf("\033[2KMaximum brightness: %i\n", max);
- printf("\033[2KInitial brightness: %i\n", init);
- printf("\033[2KCurrent brightness: %i\n", cur);
-
- fflush(stdout);
-}
-
--
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