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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
#include <libcgroup.h>
#include <libcgroup-internal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "tools-common.h"
int main(int argc, char *argv[])
{
int ret = 0;
int i;
char c;
char *buf;
char con[FILENAME_MAX];
struct control_value *name_value = NULL;
int nv_number = 0;
int nv_max = 0;
struct cgroup *cgroup;
struct cgroup_controller *cgc;
/* no parametr on input */
if (argc < 2) {
fprintf(stderr, "Usage is %s -r <name=value> "
"<relative path to cgroup>\n", argv[0]);
return -1;
}
/* parse arguments */
while ((c = getopt(argc, argv, "r:")) > 0) {
switch (c) {
case 'r':
/* add name-value pair to buffer
(= name_value variable) */
if (nv_number >= nv_max) {
nv_max += CG_NV_MAX;
name_value = (struct control_value *)
realloc(name_value,
nv_max * sizeof(struct control_value));
if (!name_value) {
fprintf(stderr, "cgset: "
"not enough memory\n");
ret = -1;
goto err;
}
}
/* parse optarg value */
/* there is necessary to input the tuple n=v */
buf = strtok(optarg, "=");
if (buf == NULL) {
fprintf(stderr, "%s: "
"wrong parameter of option -r: %s\n",
argv[0], optarg);
ret = -1;
goto err;
}
strncpy(name_value[nv_number].name, buf, FILENAME_MAX);
name_value[nv_number].name[FILENAME_MAX-1] = '\0';
buf = strtok(NULL, "=");
if (buf == NULL) {
fprintf(stderr, "%s: "
"wrong parameter of option -r: %s\n",
argv[0], optarg);
ret = -1;
goto err;
}
strncpy(name_value[nv_number].value, buf, CG_VALUE_MAX);
name_value[nv_number].value[CG_VALUE_MAX-1] = '\0';
nv_number++;
break;
default:
fprintf(stderr, "%s: invalid command line option\n",
argv[0]);
ret = -1;
goto err;
break;
}
}
/* no cgroup name */
if (!argv[optind]) {
fprintf(stderr, "%s: no cgroup specified\n", argv[0]);
ret = -1;
goto err;
}
if (nv_number == 0) {
fprintf(stderr, "%s: no name-value pair was set\n", argv[0]);
ret = -1;
goto err;
}
/* initialize libcgroup */
ret = cgroup_init();
if (ret) {
fprintf(stderr, "%s: libcgroup initialization failed: %s\n",
argv[0], cgroup_strerror(ret));
goto err;
}
while (optind < argc) {
/* create new cgroup */
cgroup = cgroup_new_cgroup(argv[optind]);
if (!cgroup) {
ret = ECGFAIL;
fprintf(stderr, "%s: can't add new cgroup: %s\n",
argv[0], cgroup_strerror(ret));
ret = -1;
goto err;
}
/* add pairs name-value to
relevant controllers of this cgroup */
for (i = 0; i < nv_number; i++) {
if ((strchr(name_value[i].name, '.')) == NULL) {
fprintf(stderr, "%s: "
"wrong -r parameter (%s=%s)\n",
argv[0], name_value[i].name,
name_value[i].value);
ret = -1;
goto cgroup_free_err;
}
strncpy(con, name_value[i].name, FILENAME_MAX);
strtok(con, ".");
/* add relevant controller */
cgc = cgroup_add_controller(cgroup, con);
if (!cgc) {
fprintf(stderr, "%s: "
"controller %s can't be add\n",
argv[0], con);
goto cgroup_free_err;
}
/* add name-value pair to this controller */
ret = cgroup_add_value_string(cgc,
name_value[i].name, name_value[i].value);
if (ret) {
fprintf(stderr, "%s: "
"name-value pair %s=%s "
"can't be set\n",
argv[0], name_value[i].name,
name_value[i].value);
goto cgroup_free_err;
}
}
/* modify cgroup */
ret = cgroup_modify_cgroup(cgroup);
if (ret) {
fprintf(stderr, "%s: "
"the group can't be modified\n",
argv[0]);
goto cgroup_free_err;
}
optind++;
cgroup_free(&cgroup);
}
cgroup_free_err:
if (ret)
cgroup_free(&cgroup);
err:
free(name_value);
return ret;
}
|
