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
|
#include <fcntl.h>
#include "zdtmtst.h"
#include "sysctl.h"
int sysctl_read_str(const char *name, char *data, size_t size)
{
int fd, ret;
fd = open(name, O_RDONLY);
if (fd < 0) {
pr_perror("Can't open %s", name);
return -1;
}
ret = read(fd, data, size - 1);
if (ret < 0) {
pr_perror("Can't read %s", name);
close(fd);
return -1;
}
data[ret] = '\0';
close(fd);
return 0;
}
int sysctl_write_str(const char *name, char *data)
{
int fd, ret;
fd = open(name, O_WRONLY);
if (fd < 0) {
pr_perror("Can't open %s", name);
return -1;
}
ret = write(fd, data, strlen(data));
if (ret < 0) {
pr_perror("Can't write %s into %s", data, name);
close(fd);
return -1;
}
close(fd);
return 0;
}
int sysctl_read_int(const char *name, int *data)
{
int fd;
int ret;
char buf[16];
fd = open(name, O_RDONLY);
if (fd < 0) {
pr_perror("Can't open %s", name);
return fd;
}
ret = read(fd, buf, sizeof(buf) - 1);
if (ret < 0) {
pr_perror("Can't read %s", name);
ret = -errno;
goto err;
}
buf[ret] = '\0';
*data = (int)strtoul(buf, NULL, 10);
ret = 0;
err:
close(fd);
return ret;
}
int sysctl_write_int(const char *name, int val)
{
int fd;
int ret;
char buf[16];
fd = open(name, O_WRONLY);
if (fd < 0) {
pr_perror("Can't open %s", name);
return fd;
}
sprintf(buf, "%d\n", val);
ret = write(fd, buf, strlen(buf));
if (ret < 0) {
pr_perror("Can't write %d into %s", val, name);
ret = -errno;
goto err;
}
ret = 0;
err:
close(fd);
return ret;
}
|
