void backlight_fading(int from, int to, int backend) {
int step;
if (from == -1)
from = get_screen_backlight_value();
if (from > to) {
step=(from-to)/4;
set_screen_backlight_value(from-step, backend);
usleep(100000);
set_screen_backlight_value(from-step*2, backend);
usleep(100000);
set_screen_backlight_value(from-step*3, backend);
usleep(100000);
set_screen_backlight_value(to, backend);
}
if (from < to) {
step=(to-from)/4;
set_screen_backlight_value(to-step*3, backend);
usleep(20000);
set_screen_backlight_value(to-step*2, backend);
usleep(20000);
set_screen_backlight_value(to-step, backend);
usleep(20000);
set_screen_backlight_value(to, backend);
}
}
int
main (int argc, char *argv[])
{
int screensaver = 0, c, brightness_prev = -1, backlight_prev = -1;
int light = 0, brightness = 255, backlight = 100;
int foreground = 0, verbose = 0, debug = 0;
int brightness_restore, backlight_restore, brightness_restoreflag =
0, backlight_restoreflag = 0;
int res, dbus_backend = -1, tmp = -1;
float idletime = 0;
pid_t pid;
conf_data conf;
Display *display = NULL;
DBusGConnection *connection;
DBusGProxy *proxy_manager;
DBusGProxy *proxy_session;
uid_t uid, euid;
int light_aux = -1, light_avg = -1;
int lightvalues[15] = { 0 };
int countarray[256] = { 0 };
unsigned int i, index = 0;
// make sure we are run as a regular user
uid = getuid ();
euid = geteuid ();
if (uid == 0 || euid == 0) {
fprintf (stderr, "lightum must NOT be run as root.\n");
exit (1);
}
// overwrite defaults with config file
conf = config_parse ();
// overwrite config file with command line arguments
while ((c = getopt (argc, argv, "hxuUlsvfm:n:M:N:p:I:i:d:w:?")) != EOF) {
switch (c) {
case 'h':
usage ("");
break;
case 'x':
conf.manualmode = 1;
break;
case 'u':
conf.ignoreuser = 0;
break;
case 'U':
conf.ignoresession = 1;
break;
case 'l':
conf.fulldim = 1;
break;
case 's':
conf.queryscreensaver = 1;
break;
case 'f':
foreground = 1;
break;
case 'v':
verbose = 1;
break;
case 'd':
debug = atoi (optarg);
break;
case 'm':
conf.maxbrightness = atoi (optarg);
break;
case 'n':
conf.minbrightness = atoi (optarg);
break;
case 'M':
conf.maxbacklight = atoi (optarg);
break;
case 'N':
conf.minbacklight = atoi (optarg);
break;
case 'p':
conf.polltime = atoi (optarg);
break;
case 'i':
conf.idleoff = atoi (optarg);
break;
case 'I':
conf.screenidle = atoi (optarg);
break;
case 'w':
conf.workmode = atoi (optarg);
break;
default:
usage ("ERROR: Unknown OPTION\n");
break;
}
}
if (verbose)
printf ("CONFIG:\n\tmanualmode: %d\n", conf.manualmode);
if (verbose)
printf ("\tignoreuser: %d\n", conf.ignoreuser);
if (verbose)
printf ("\tignoresession: %d\n", conf.ignoresession);
if (verbose)
printf ("\tworkmode: %d\n", conf.workmode);
if (verbose)
printf ("\tqueryscreensaver: %d\n", conf.queryscreensaver);
if (verbose)
printf ("\tmaxbrightness: %d\n", conf.maxbrightness);
if (verbose)
printf ("\tminbrightness: %d\n", conf.minbrightness);
if (verbose)
printf ("\tmaxbacklight: %d\n", conf.maxbacklight);
if (verbose)
printf ("\tminbacklight: %d\n", conf.minbacklight);
if (verbose)
printf ("\tpolltime: %d\n", conf.polltime);
if (verbose)
printf ("\tidleoff: %d\n", conf.idleoff);
if (verbose)
printf ("\tscreenidle: %d\n", conf.screenidle);
if (verbose)
printf ("\tfulldim: %d\n\n", conf.fulldim);
// make sure all config values are correct
check_config_values (conf);
if (debug < 0 || debug > 3)
usage ("ERROR: Wrong value in config variable 'debug'\n");
// if debug enabled, force verbose mode too
if (debug > 0)
verbose = 1;
// if verbose enabled, force foreground mode too
if (verbose)
foreground = 1;
if (conf.manualmode)
printf ("lightum v%s running in manual mode ", VERSION);
else
printf ("lightum v%s running in auto mode ", VERSION);
fflush (stdout);
if (!foreground) {
if ((pid = fork ()) < 0)
exit (1);
else if (pid != 0)
exit (0);
/* daemon running here */
setsid ();
res = chdir ("/");
if (res != 0) {
perror ("Could not chdir");
exit (1);
}
umask (0);
printf ("forked into background\n");
} else
printf ("\n");
/* create pid file */
if (!create_pid_file ())
exit (1);
/* start with current brightness values */
if (conf.workmode == 1 || conf.workmode == 3) {
brightness_restore = get_keyboard_brightness_value ();
}
/* start with current backlight values */
if (conf.workmode == 2 || conf.workmode == 3) {
backlight_restore = get_screen_backlight_value ();
// detect dbus backend: 0: gnome, 1: kde
tmp =
dbus_set_screen_backlight_value_gnome (acpi_to_dbus_backlight
(backlight_restore));
if (tmp == -1) {
tmp =
dbus_set_screen_backlight_value_kde (acpi_to_dbus_backlight
(backlight_restore));
if (tmp == -1) {
tmp =
set_screen_xbacklight_value (acpi_to_dbus_backlight
(backlight_restore));
if (tmp == -1) {
fprintf (stderr,
"Can't manage screen backlight on this system.\nPlease disable backlight with config option 'workmode='1' or command line switch '-w 1'.\nIf you believe this is an error, open a bug report: https://github.com/poliva/lightum/issues\n");
exit (1);
} else {
dbus_backend = 2;
}
} else {
dbus_backend = 1;
}
} else {
dbus_backend = 0;
}
}
if (conf.idleoff != 0 || conf.screenidle != 0) {
display = XOpenDisplay (NULL);
if (display == NULL) {
fprintf (stderr, "Failed to open display\n");
exit (1);
}
}
signal_installer ();
if (!conf.ignoresession) {
connection = get_dbus_connection ();
proxy_manager = get_dbus_proxy_manager (connection);
proxy_session = get_dbus_proxy_session (connection, proxy_manager);
}
// initialize the light values array
if (!conf.manualmode) {
light = get_light_sensor_value ();
for (i = 0; i < ARRAY_LENGTH (lightvalues); i++)
lightvalues[i] = light;
countarray[light] = ARRAY_LENGTH (lightvalues);
} else {
for (i = 0; i < ARRAY_LENGTH (lightvalues); i++)
lightvalues[i] = 0;
}
while (1) {
if (reloadconfig) {
conf = config_parse ();
if (verbose)
printf ("lightum: SIGUSR1 received, configuration reloaded\n");
check_config_values (conf);
reloadconfig = 0;
}
if (!conf.ignoresession) {
if (!get_session_active (proxy_session)) {
if (verbose)
printf
("lightum: user session not active, sleeping %d milliseconds.\nIf you believe this is an error, try running lightum with 'ignoresession=1' or '-U' command line switch.\n",
conf.polltime);
usleep (conf.polltime * 1000);
continue;
}
}
if (!conf.manualmode) {
light = get_light_sensor_value ();
if (verbose)
printf ("light_sensor: %d ", light);
// to avoid backlight flickering when the light sensor flaps too frequently
// between two values, we collect lighting values and use the most common
// value of the collected values
if (index == ARRAY_LENGTH (lightvalues))
index = 0;
lightvalues[index] = light;
// get the most repetitive value of lightvalues array
for (i = 0; i < ARRAY_LENGTH (lightvalues); ++i) {
countarray[lightvalues[i]]++;
}
light_avg = -1;
light_aux = -1;
for (i = 0; i < ARRAY_LENGTH (countarray); ++i) {
if (countarray[i] > light_aux) {
light_aux = countarray[i];
light_avg = i;
}
countarray[i] = 0;
}
light = light_avg;
if (verbose)
printf ("light_avg: %d ", light);
index++;
}
if (conf.idleoff != 0 || conf.screenidle != 0) {
idletime = get_session_idle_time (display);
if (verbose)
printf ("idle_time: %f ", idletime);
}
if (!conf.manualmode) {
if (conf.workmode == 1 || conf.workmode == 3)
brightness =
calculate_keyboard_brightness_value (light,
conf.maxbrightness,
conf.minbrightness);
if (conf.workmode == 2 || conf.workmode == 3)
backlight =
calculate_screen_backlight_value (light, conf.maxbacklight,
conf.minbacklight);
if (verbose)
printf ("auto mode ");
} else {
if (verbose)
printf ("manual mode ");
if (conf.workmode == 1 || conf.workmode == 3) {
if (!screensaver) {
if (idletime > conf.idleoff) {
if (brightness_restoreflag == 0) {
brightness_restore =
get_keyboard_brightness_value ();
brightness_restoreflag = 1;
if (debug == 1 || debug == 3)
printf ("brightness_restoreflag(%d) ",
brightness_restore);
}
brightness = conf.minbrightness;
} else {
brightness = brightness_restore;
brightness_restoreflag = 0;
if (debug == 1 || debug == 3)
printf ("brightness_restored(%d) ",
brightness_restore);
}
}
}
if (conf.workmode == 2 || conf.workmode == 3) {
if (!screensaver) {
if (idletime > conf.screenidle) {
if (backlight_restoreflag == 0) {
backlight_restore = get_screen_backlight_value ();
backlight_restoreflag = 1;
if (debug == 2 || debug == 3)
printf ("backlight_restoreflag(%d) ",
backlight_restore);
}
if (conf.fulldim)
backlight = 1;
else
backlight = conf.minbacklight;
} else {
backlight = backlight_restore;
backlight_restoreflag = 0;
if (debug == 2 || debug == 3)
printf ("backlight_restored(%d) ",
backlight_restore);
}
}
}
}
if (conf.workmode == 1 || conf.workmode == 3) {
if ((conf.idleoff != 0) && (idletime > conf.idleoff)) {
brightness = conf.minbrightness;
}
}
if (conf.workmode == 2 || conf.workmode == 3) {
if ((conf.screenidle != 0) && (idletime > conf.screenidle)) {
if (conf.fulldim)
backlight = 1;
else
backlight = conf.minbacklight;
}
}
if (conf.queryscreensaver) {
screensaver = get_screensaver_active ();
if (verbose)
printf ("screensaver: %d ", screensaver);
if (screensaver) {
brightness = 0;
backlight = conf.minbacklight;
}
}
if (conf.workmode == 1 || conf.workmode == 3)
if (verbose)
printf ("brightness: %d/%d ", brightness, conf.maxbrightness);
if (conf.workmode == 2 || conf.workmode == 3)
if (verbose)
printf ("backlight: %d/%d ", backlight, conf.maxbacklight);
// keyboard brightness
if (conf.workmode == 1 || conf.workmode == 3) {
if (brightness != brightness_prev) {
if (!conf.manualmode) {
brightness_restore = get_keyboard_brightness_value ();
if (brightness_restore < conf.minbrightness)
brightness_restore = conf.minbrightness;
if (debug == 1 || debug == 3)
printf ("\ncurrent brightness: %d\n",
brightness_restore);
if ((brightness_restore != brightness_prev)
&& (brightness_restoreflag)) {
if (!conf.ignoreuser) {
/* make sure maxbrightness is never <4 */
if (brightness_restore < 4)
conf.maxbrightness = 4;
else
conf.maxbrightness = brightness_restore;
if (verbose)
printf
("-> Detected user brightness change, setting maxbrightness to %d\n",
conf.maxbrightness);
brightness_prev = brightness_restore;
} else {
if (verbose)
printf
("-> Ignoring user brightness change, wants to set maxbrightness to %d\n",
brightness_restore);
}
brightness =
calculate_keyboard_brightness_value (light,
conf.
maxbrightness,
conf.
minbrightness);
}
brightness_restoreflag = 1;
}
if (debug == 1 || debug == 3)
printf ("-> set keyboard brightness: %d -> %d\n",
brightness_prev, brightness);
fading (brightness_prev, brightness);
usleep (1500);
brightness = get_keyboard_brightness_value ();
brightness_prev = brightness;
}
if (!conf.manualmode) {
tmp = get_keyboard_brightness_value ();
if (tmp != brightness) {
if (verbose)
printf
("-> Detected user brightness change, current brightness is set to %d\n",
tmp);
if (conf.ignoreuser) {
if (debug == 1 || debug == 3)
printf ("\n*** forcing brightness from %d to %d\n",
tmp, brightness);
fading (tmp, brightness);
}
}
}
}
// screen backlight
if (conf.workmode == 2 || conf.workmode == 3) {
if (backlight != backlight_prev) {
if (!conf.manualmode) {
backlight_restore = get_screen_backlight_value ();
if (debug == 2 || debug == 3)
printf ("\ncurrent backlight: %d\n",
backlight_restore);
if ((backlight_restore != backlight_prev)
&& (backlight_restoreflag)) {
if (!conf.ignoreuser) {
if (verbose)
printf
("-> Detected user backlight change, switching to manualmode\n");
conf.manualmode = 1;
backlight_prev = backlight_restore;
backlight = backlight_restore;
} else {
if (verbose)
printf
("-> Ignoring user backlight change, wants to set maxbacklight to %d\n",
backlight_restore);
backlight =
calculate_screen_backlight_value (light,
conf.
maxbacklight,
conf.
minbacklight);
}
}
backlight_restoreflag = 1;
}
if (debug == 2 || debug == 3)
printf ("-> set screen backlight: %d -> %d\n",
backlight_prev, backlight);
backlight_fading (backlight_prev, backlight, dbus_backend);
usleep (1500);
backlight = get_screen_backlight_value ();
backlight_prev = backlight;
}
if (!conf.manualmode) {
tmp = get_screen_backlight_value ();
if (tmp != backlight) {
if (verbose)
printf
("-> Detected user backlight change, current backlight is set to %d\n",
tmp);
if (conf.ignoreuser) {
if (debug == 2 || debug == 3)
printf ("\n*** forcing backlight from %d to %d\n",
tmp, backlight);
backlight_fading (tmp, backlight, dbus_backend);
}
}
}
}
if (verbose)
printf ("\n");
usleep (conf.polltime * 1000);
}
// we should never reach here.
//if (conf.idleoff != 0) XCloseDisplay(display);
//dbus_g_connection_unref(connection);
exit (1);
}