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-rw-r--r--src/adjbacklight.c272
1 files changed, 272 insertions, 0 deletions
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;
+}
+
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