1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include <fcntl.h>
#include <Eeze.h>
/* local subsystem functions */
static int
_bl_write_file(const char *file, int val)
{
char buf[256];
int fd = open(file, O_WRONLY);
if (fd < 0)
{
perror("open");
return -1;
}
snprintf(buf, sizeof(buf), "%d", val);
if (write(fd, buf, strlen(buf)) != (int)strlen(buf))
{
perror("write");
close(fd);
return -1;
}
close(fd);
return 0;
}
/* externally accessible functions */
int
main(int argc, char **argv)
{
int i, level, devok = 0;
const char *f, *dev = NULL, *str;
int maxlevel = 0, curlevel = -1;
Eina_List *devs, *l;
char buf[4096] = "";
for (i = 1; i < argc; i++)
{
if ((!strcmp(argv[i], "-h")) ||
(!strcmp(argv[i], "-help")) ||
(!strcmp(argv[i], "--help")))
{
printf("This is an internal tool for Enlightenment.\n"
"do not use it.\n");
exit(0);
}
}
if (argc == 3)
{
level = atoi(argv[1]);
dev = argv[2];
}
else
exit(1);
if (!dev) return -1;
if (setuid(0) != 0)
{
printf("ERROR: UNABLE TO ASSUME ROOT PRIVILEGES\n");
exit(5);
}
if (setgid(0) != 0)
{
printf("ERROR: UNABLE TO ASSUME ROOT GROUP PRIVILEGES\n");
exit(7);
}
eeze_init();
devs = eeze_udev_find_by_filter("backlight", NULL, NULL);
if (!devs)
{
devs = eeze_udev_find_by_filter("leds", NULL, NULL);
if (!devs) return -1;
}
if (devs)
{
EINA_LIST_FOREACH(devs, l, f)
{
if (!strcmp(f, dev))
{
dev = f;
devok = 1;
break;
}
}
}
if (!devok) return -1;
str = eeze_udev_syspath_get_sysattr(dev, "max_brightness");
if (str)
{
maxlevel = atoi(str);
eina_stringshare_del(str);
str = eeze_udev_syspath_get_sysattr(dev, "brightness");
if (str)
{
curlevel = atoi(str);
eina_stringshare_del(str);
}
}
if (maxlevel <= 0) maxlevel = 255;
if (curlevel >= 0)
{
curlevel = ((maxlevel * level) + 500) / 1000;
if (curlevel > maxlevel) curlevel = maxlevel;
else if (curlevel < 0)
curlevel = 0;
snprintf(buf, sizeof(buf), "%s/brightness", f);
return _bl_write_file(buf, curlevel);
}
EINA_LIST_FREE(devs, f)
eina_stringshare_del(f);
return -1;
}
|
