diff options
| -rw-r--r-- | .gitignore | 7 | ||||
| -rw-r--r-- | src/adjbacklight.c | 272 |
2 files changed, 278 insertions, 1 deletions
@@ -1,7 +1,8 @@ _/ +bin/ +obj/ .* !.git* -*.class *~ \#.\# *.swp @@ -11,6 +12,10 @@ _/ *.dvi *.info *.install +*.class +*.out +*.o +*.gch /dist/*/*/* !/dist/*/*/PKGBUILD diff --git a/src/adjbacklight.c b/src/adjbacklight.c new file mode 100644 index 0000000..d50fbce --- /dev/null +++ b/src/adjbacklight.c @@ -0,0 +1,272 @@ +/** + * adjbacklight – Convient method for adjusting the backlight on your portable computer + * + * Copyright © 2012, 2013, 2014 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 <unistd.h> +#include <dirent.h> +#include <string.h> + + +/** + * The years this software has been developed + */ +#define _YEARS_ "2012, 2013, 2014" + + +/** + * Forking method + */ +#define FORK vfork + + +/** + * Print a line to stdout + * + * @param S:char* The string to print + */ +#define P(S) printf("%s", S "\n") + + + +#define adjust(X,Y,Z) + + + +/** + * 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; + int rows, cols; + struct termios saved_stty; + struct termios stty; + pid_t pid; + + int i, j; + int all = 0; + char** devices = alloca(argc * sizeof(char*)); + int ndevices = 0; + + + if (argc > 1) + { + char* arg; + for (i = 1; i < argc; i++) + { + #define T(S) (!strcmp(arg, S)) + arg = *(argv + i); + if (T("-a") || T("--all")) + all = 1; + else if (T("-c") || T("--copyright") || T("--copying")) + { + P("\n"); + P("adjbacklight – Convient 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 (*arg && (*arg != '-')) + *(devices + ndevices++) = arg; + } + #undef T + } + if (all + ndevices == 0) + { + P("\n"); + P("adjbacklight - Convient method for adjusting the backlight on your portable computer"); + P(""); + P("USAGE: adjbacklight [ -c | -w | -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(""); + 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; + } + } + + + 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"); + + + /* rows cols = $(stty size) */ + if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) == -1) + { + perror(*argv); + rows = 24; + cols = 80; + } + else + { + rows = win.ws_row; + cols = win.ws_col; + } + + /* Hide cursor */ + printf("%s", "\033[?25l"); + fflush(stdout); + + /* stty -icanon -echo */ + if (tcgetattr(STDIN_FILENO, &saved_stty)) + { + perror(*argv); + return 1; + } + saved_stty = stty; + stty.c_lflag &= ~(ICANON | ECHO); + if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &stty)) + { + perror(*argv); + return 1; + } + + + /* Fork to diminish risk for unclean exit */ + pid = FORK(); + if (pid == (pid_t)-1) + { + perror(*argv); + pid = 0; + } + + if (pid) + waitpid(pid, NULL, 0); + else + 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; + } + adjust(rows, cols, device); + } + } + else + { + struct dirent* ent; + DIR* dir = opendir("/sys/class/backlight"); + if (dir) + { + char* device; + char* forbidden = "acpi_video"; + while ((ent = readdir(dir))) + { + device = ent->d_name; + if (all || (strstr(device, forbidden) != forbidden)) + adjust(rows, cols, device); + } + closedir(dir); + } + } + + + /* `stty icanon echo` */ + tcsetattr(STDIN_FILENO, TCSAFLUSH, &saved_stty); + { + perror(*argv); + return 1; + } + + /* Show cursor */ + printf("%s", "\033[?25h"); + fflush(stdout); + + return 0; +} + |