brightness chunk::getbrightness(int x, int y, int z){
return getbrightness((ubyte)x, (ubyte)y, (ubyte)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;
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 ([email protected])");
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 ([email protected])");
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;
}