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commit 45faf0f0c252caef32c5d6052d2d730d99e089bc 1 parent 18de058
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  1. +280 0 LICENSE
  2. +148 0 lightum.c
  3. +15 0 lightum.desktop
280 LICENSE
... ... @@ -0,0 +1,280 @@
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  280 + END OF TERMS AND CONDITIONS
148 lightum.c
... ... @@ -0,0 +1,148 @@
  1 +/*
  2 + * MacBook automatic keyboard brightness daemon
  3 + * Copyright 2011 Pau Oliva Fora <pof@eslack.org>
  4 + *
  5 + * This program is free software; you can redistribute it and/or
  6 + * modify it under the terms of the GNU General Public License
  7 + * as published by the Free Software Foundation; either version 2
  8 + * of the License, or (at your option) any later version.
  9 + *
  10 + * This program is distributed in the hope that it will be useful,
  11 + * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13 + * GNU General Public License for more details.
  14 + *
  15 + * You should have received a copy of the GNU General Public License
  16 + * along with this program; if not, write to the Free Software
  17 + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18 + *
  19 + */
  20 +#include <stdlib.h>
  21 +#include <stdio.h>
  22 +#include <string.h>
  23 +#include <fcntl.h>
  24 +#include <unistd.h>
  25 +#include <sys/types.h>
  26 +#include <sys/stat.h>
  27 +
  28 +#define VERSION "1.0"
  29 +
  30 +int get_light_sensor_value() {
  31 +
  32 + int fd;
  33 + int i,n=0;
  34 + char buf[10];
  35 + char a_light[10];
  36 + char *light_sensor="/sys/devices/platform/applesmc.768/light";
  37 +
  38 + /* read light sensor value */
  39 + fd = open(light_sensor, O_RDONLY);
  40 + if (fd < 0) {
  41 + perror (light_sensor);
  42 + fprintf (stderr, "Can't open %s\n",light_sensor);
  43 + exit(1);
  44 + }
  45 + read(fd, buf, 9);
  46 + buf[9]='\0';
  47 + close(fd);
  48 +
  49 + /* convert light sensor string value to integer */
  50 + for (i=0;i<sizeof(buf);i++) {
  51 + if (buf[i]==',') break;
  52 + if (buf[i]!='(') {
  53 + a_light[n]=buf[i];
  54 + n++;
  55 + }
  56 + }
  57 + a_light[n]='\0';
  58 +
  59 + return atoi(a_light);
  60 +}
  61 +
  62 +int calculate_keyboard_brightness_value(int light, int maxlight) {
  63 +
  64 + int brightness=0;
  65 +
  66 + if (light == 0 ) brightness=maxlight;
  67 + else if (light < 8 ) brightness=maxlight*0.75;
  68 + else if (light < 16 ) brightness=maxlight*0.66;
  69 + else if (light < 32) brightness=maxlight*0.33;
  70 + else if (light < 64) brightness=maxlight*0.16;
  71 + else if (light < 128) brightness=maxlight*0.08;
  72 + else if (light >= 128) brightness=0;
  73 +
  74 + return brightness;
  75 +}
  76 +
  77 +int set_keyboard_brightness_value(int brightness) {
  78 +
  79 + char command[200];
  80 +
  81 + /* TODO: rewrite this using real dbus, instead of ugly system */
  82 + sprintf(command,"dbus-send --system --dest=org.freedesktop.UPower /org/freedesktop/UPower/KbdBacklight org.freedesktop.UPower.KbdBacklight.SetBrightness int32:%d",brightness);
  83 + return system(command);
  84 +
  85 +}
  86 +
  87 +void usage() {
  88 + fprintf(stderr, "lightum v%s - (c)2011 Pau Oliva Fora <pof@eslack.org>\n",VERSION);
  89 + fprintf(stderr, "Usage: lightum [-m value] [-p value] [-f]\n");
  90 + fprintf(stderr, " -m 0..255 : maximum brightness value between 1 and 255 (default=255)\n");
  91 + fprintf(stderr, " -p num : number of seconds between light sensor polls (default=8)\n");
  92 + fprintf(stderr, " -f : run in foreground (do not daemonize)\n");
  93 + fprintf(stderr, " -v : verbose mode, useful for debugging with -f\n");
  94 + exit(1);
  95 +}
  96 +
  97 +int main(int argc, char *argv[]) {
  98 +
  99 + int c,light,brightness,maxlight=255,foreground=0,prev=-1,polltime=8,verbose=0;
  100 + pid_t pid;
  101 +
  102 + while ((c = getopt(argc, argv, "vfm:p:?")) != EOF) {
  103 + switch(c) {
  104 + case 'f':
  105 + foreground=1;
  106 + break;
  107 + case 'v':
  108 + verbose=1;
  109 + break;
  110 + case 'm':
  111 + maxlight=atoi(optarg);
  112 + if (maxlight < 1 || maxlight > 255) usage();
  113 + break;
  114 + case 'p':
  115 + polltime=atoi(optarg);
  116 + if (polltime < 1 || polltime > 60) usage();
  117 + break;
  118 + default:
  119 + usage();
  120 + break;
  121 + }
  122 + }
  123 +
  124 + if (!foreground) {
  125 + if ((pid = fork()) < 0) exit(1);
  126 + else if (pid != 0) exit(0);
  127 + /* daemon running here */
  128 + setsid();
  129 + chdir("/");
  130 + umask(0);
  131 + }
  132 +
  133 + while(1) {
  134 +
  135 + light=get_light_sensor_value();
  136 + if (verbose) printf("light_sensor: %d\n",light);
  137 + brightness=calculate_keyboard_brightness_value(light, maxlight);
  138 +
  139 + if (brightness!=prev) {
  140 + prev=brightness;
  141 + if (verbose) printf ("-> set keyboard brightness: %d\n",brightness);
  142 + set_keyboard_brightness_value(brightness);
  143 + }
  144 +
  145 + sleep(polltime);
  146 + }
  147 + exit(0);
  148 +}
15 lightum.desktop
... ... @@ -0,0 +1,15 @@
  1 +[Desktop Entry]
  2 +Type=Application
  3 +Exec=/usr/bin/lightum
  4 +Icon=
  5 +Categories=
  6 +Hidden=false
  7 +NoDisplay=true
  8 +Terminal=false
  9 +X-GNOME-Autostart-enabled=true
  10 +X-KDE-autostart-after=panel
  11 +X-KDE-StartupNotify=false
  12 +Name[en_US]=lightum
  13 +Name=lightum
  14 +Comment[en_US]=Adjust keyboard backlight automatically.
  15 +Comment=Adjust keyboard backlight automatically.

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