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1 | /*-*- Mode: C; c-basic-offset: 8 -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | #include <limits.h> | |
23 | #include <stdio.h> | |
24 | #include <unistd.h> | |
25 | #include <errno.h> | |
26 | #include <getopt.h> | |
27 | #include <string.h> | |
28 | ||
29 | #include "cgroup-show.h" | |
c6c18be3 | 30 | #include "cgroup-util.h" |
fa776d8e LP |
31 | #include "log.h" |
32 | #include "util.h" | |
33 | ||
34 | static void help(void) { | |
35 | ||
36 | printf("%s [OPTIONS...] [CGROUP...]\n\n" | |
37 | "Recursively show control group contents.\n\n" | |
38 | " -h --help Show this help\n", | |
39 | program_invocation_short_name); | |
40 | } | |
41 | ||
42 | static int parse_argv(int argc, char *argv[]) { | |
43 | ||
44 | static const struct option options[] = { | |
45 | { "help", no_argument, NULL, 'h' }, | |
46 | { NULL, 0, NULL, 0 } | |
47 | }; | |
48 | ||
49 | int c; | |
50 | ||
51 | assert(argc >= 1); | |
52 | assert(argv); | |
53 | ||
54 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) { | |
55 | ||
56 | switch (c) { | |
57 | ||
58 | case 'h': | |
59 | help(); | |
60 | return 0; | |
61 | ||
62 | case '?': | |
63 | return -EINVAL; | |
64 | ||
65 | default: | |
66 | log_error("Unknown option code %c", c); | |
67 | return -EINVAL; | |
68 | } | |
69 | } | |
70 | ||
71 | return 1; | |
72 | } | |
73 | ||
74 | int main(int argc, char *argv[]) { | |
75 | int r = 0, retval = 1; | |
76 | ||
77 | log_parse_environment(); | |
78 | ||
79 | if ((r = parse_argv(argc, argv)) < 0) | |
80 | goto finish; | |
81 | else if (r == 0) { | |
82 | retval = 0; | |
83 | goto finish; | |
84 | } | |
85 | ||
86 | if (optind < argc) { | |
87 | unsigned i; | |
88 | ||
89 | for (i = (unsigned) optind; i < (unsigned) argc; i++) { | |
90 | int q; | |
91 | printf("%s:\n", argv[i]); | |
92 | ||
35d2e7ec | 93 | if ((q = show_cgroup_by_path(argv[i], NULL, 0)) < 0) |
fa776d8e LP |
94 | r = q; |
95 | } | |
96 | ||
97 | } else { | |
98 | char *p; | |
99 | ||
100 | if (!(p = get_current_dir_name())) { | |
101 | log_error("Cannot determine current working directory: %m"); | |
102 | goto finish; | |
103 | } | |
104 | ||
105 | if (path_startswith(p, "/cgroup")) { | |
106 | printf("Working Directory %s:\n", p); | |
35d2e7ec | 107 | r = show_cgroup_by_path(p, NULL, 0); |
fa776d8e | 108 | } else |
35d2e7ec | 109 | r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, "/", NULL, 0); |
fa776d8e LP |
110 | |
111 | free(p); | |
112 | } | |
113 | ||
114 | if (r < 0) | |
115 | log_error("Failed to list cgroup tree: %s", strerror(-r)); | |
116 | ||
117 | retval = 0; | |
118 | ||
119 | finish: | |
120 | ||
121 | return retval; | |
122 | } |