diff options
Diffstat (limited to '.bin/bri.c')
-rwxr-xr-x | .bin/bri.c | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/.bin/bri.c b/.bin/bri.c deleted file mode 100755 index 4c53475f..00000000 --- a/.bin/bri.c +++ /dev/null @@ -1,78 +0,0 @@ -#if 0 -cc -Wall -Wextra -pedantic $@ -o $(dirname $0)/bri $0 && \ -sudo chown root:root $(dirname $0)/bri && \ -sudo chmod u+s $(dirname $0)/bri -exit -#endif - -// Backlight brightness control. - -#include <dirent.h> -#include <err.h> -#include <errno.h> -#include <stdio.h> -#include <string.h> -#include <sysexits.h> -#include <unistd.h> - -static const char *CLASS = "/sys/class/backlight"; - -int main(int argc, char *argv[]) { - int error; - - if (argc < 2) errx(EX_USAGE, "usage: bri N | +... | -..."); - - error = chdir(CLASS); - if (error) err(EX_IOERR, "%s", CLASS); - - DIR *dir = opendir("."); - if (!dir) err(EX_IOERR, "%s", CLASS); - - struct dirent *entry; - while (NULL != (errno = 0, entry = readdir(dir))) { - if (entry->d_name[0] == '.') continue; - - error = chdir(entry->d_name); - if (error) err(EX_IOERR, "%s", entry->d_name); - break; - } - if (!entry) { - if (errno) err(EX_IOERR, "%s", CLASS); - errx(EX_CONFIG, "empty %s", CLASS); - } - - char *value = argv[1]; - - if (value[0] == '+' || value[0] == '-') { - FILE *actual = fopen("actual_brightness", "r"); - if (!actual) err(EX_IOERR, "actual_brightness"); - - unsigned int brightness; - int match = fscanf(actual, "%u", &brightness); - if (match == EOF) err(EX_IOERR, "actual_brightness"); - if (match < 1) err(EX_DATAERR, "actual_brightness"); - - size_t count = strnlen(value, 15); - if (value[0] == '+') { - brightness += 16 * count; - } else { - brightness -= 16 * count; - } - - char buf[15]; - snprintf(buf, sizeof(buf), "%u", brightness); - - value = buf; - } - - error = setuid(0); - if (error) err(EX_NOPERM, "setuid(0)"); - - FILE *brightness = fopen("brightness", "w"); - if (!brightness) err(EX_IOERR, "brightness"); - - int count = fprintf(brightness, "%s", value); - if (count < 0) err(EX_IOERR, "brightness"); - - return EX_OK; -} |