130 lines
2.7 KiB
C
130 lines
2.7 KiB
C
#include "config.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <Eeze.h>
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/* local subsystem functions */
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static int
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_bl_write_file(const char *file, int val)
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{
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char buf[256];
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int fd = open(file, O_WRONLY);
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if (fd < 0)
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{
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perror("open");
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return -1;
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}
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snprintf(buf, sizeof(buf), "%d", val);
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if (write(fd, buf, strlen(buf)) != (int)strlen(buf))
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{
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perror("write");
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close(fd);
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return -1;
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}
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close(fd);
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return 0;
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}
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/* externally accessible functions */
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int
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main(int argc, char **argv)
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{
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int i, level, devok = 0;
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const char *f, *dev = NULL, *str;
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int maxlevel = 0, curlevel = -1;
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Eina_List *devs, *l;
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char buf[4096] = "";
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for (i = 1; i < argc; i++)
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{
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if ((!strcmp(argv[i], "-h")) ||
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(!strcmp(argv[i], "-help")) ||
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(!strcmp(argv[i], "--help")))
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{
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printf("This is an internal tool for Enlightenment.\n"
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"do not use it.\n");
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exit(0);
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}
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}
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if (argc == 3)
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{
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level = atoi(argv[1]);
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dev = argv[2];
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}
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else
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exit(1);
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if (!dev) return -1;
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if (setuid(0) != 0)
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{
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printf("ERROR: UNABLE TO ASSUME ROOT PRIVILEGES\n");
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exit(5);
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}
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if (setgid(0) != 0)
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{
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printf("ERROR: UNABLE TO ASSUME ROOT GROUP PRIVILEGES\n");
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exit(7);
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}
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eeze_init();
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devs = eeze_udev_find_by_filter("backlight", NULL, NULL);
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if (!devs)
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{
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devs = eeze_udev_find_by_filter("leds", NULL, NULL);
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if (!devs) return -1;
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}
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if (devs)
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{
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EINA_LIST_FOREACH(devs, l, f)
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{
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if (!strcmp(f, dev))
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{
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dev = f;
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devok = 1;
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break;
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}
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}
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}
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if (!devok) return -1;
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str = eeze_udev_syspath_get_sysattr(dev, "max_brightness");
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if (str)
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{
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maxlevel = atoi(str);
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eina_stringshare_del(str);
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str = eeze_udev_syspath_get_sysattr(dev, "brightness");
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if (str)
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{
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curlevel = atoi(str);
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eina_stringshare_del(str);
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}
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}
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if (maxlevel <= 0) maxlevel = 255;
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if (curlevel >= 0)
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{
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curlevel = ((maxlevel * level) + 500) / 1000;
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if (curlevel > maxlevel) curlevel = maxlevel;
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else if (curlevel < 0)
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curlevel = 0;
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snprintf(buf, sizeof(buf), "%s/brightness", f);
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return _bl_write_file(buf, curlevel);
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}
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EINA_LIST_FREE(devs, f)
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eina_stringshare_del(f);
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return -1;
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}
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