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
|
/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <getopt.h>
#include <string.h>
#include "cgroup-show.h"
#include "cgroup-util.h"
#include "log.h"
#include "util.h"
static void help(void) {
printf("%s [OPTIONS...] [CGROUP...]\n\n"
"Recursively show control group contents.\n\n"
" -h --help Show this help\n",
program_invocation_short_name);
}
static int parse_argv(int argc, char *argv[]) {
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ NULL, 0, NULL, 0 }
};
int c;
assert(argc >= 1);
assert(argv);
while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) {
switch (c) {
case 'h':
help();
return 0;
case '?':
return -EINVAL;
default:
log_error("Unknown option code %c", c);
return -EINVAL;
}
}
return 1;
}
int main(int argc, char *argv[]) {
int r = 0, retval = 1;
log_parse_environment();
if ((r = parse_argv(argc, argv)) < 0)
goto finish;
else if (r == 0) {
retval = 0;
goto finish;
}
if (cg_init() < 0) {
log_error("Failed to initialize libcg: %s", strerror(-r));
goto finish;
}
if (optind < argc) {
unsigned i;
for (i = (unsigned) optind; i < (unsigned) argc; i++) {
int q;
printf("%s:\n", argv[i]);
if ((q = show_cgroup_recursive(argv[i], NULL, 0)) < 0)
r = q;
}
} else {
char *p;
if (!(p = get_current_dir_name())) {
log_error("Cannot determine current working directory: %m");
goto finish;
}
if (path_startswith(p, "/cgroup")) {
printf("Working Directory %s:\n", p);
r = show_cgroup_recursive(p, NULL, 0);
} else
r = show_cgroup_recursive(NULL, NULL, 0);
free(p);
}
if (r < 0)
log_error("Failed to list cgroup tree: %s", strerror(-r));
retval = 0;
finish:
return retval;
}
|
