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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
fa776d8e LP |
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 | |
5430f7f2 LP |
9 | under the terms of the GNU Lesser General Public License as published by |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
fa776d8e LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
fa776d8e | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
fa776d8e LP |
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" | |
1968a360 | 33 | #include "pager.h" |
c3175a7f | 34 | #include "build.h" |
1968a360 LP |
35 | |
36 | static bool arg_no_pager = false; | |
1e5678d0 | 37 | static bool arg_kernel_threads = false; |
c3175a7f | 38 | static bool arg_all = false; |
fa776d8e LP |
39 | |
40 | static void help(void) { | |
41 | ||
42 | printf("%s [OPTIONS...] [CGROUP...]\n\n" | |
43 | "Recursively show control group contents.\n\n" | |
69fc152f | 44 | " -h --help Show this help\n" |
c3175a7f | 45 | " --version Show package version\n" |
1e5678d0 | 46 | " --no-pager Do not pipe output into a pager\n" |
c3175a7f | 47 | " -a --all Show all groups, including empty\n" |
1e5678d0 | 48 | " -k Include kernel threads in output\n", |
fa776d8e LP |
49 | program_invocation_short_name); |
50 | } | |
51 | ||
52 | static int parse_argv(int argc, char *argv[]) { | |
53 | ||
1968a360 | 54 | enum { |
c3175a7f LP |
55 | ARG_NO_PAGER = 0x100, |
56 | ARG_VERSION | |
1968a360 LP |
57 | }; |
58 | ||
fa776d8e | 59 | static const struct option options[] = { |
1968a360 | 60 | { "help", no_argument, NULL, 'h' }, |
c3175a7f | 61 | { "version", no_argument, NULL, ARG_VERSION }, |
1968a360 | 62 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
c3175a7f | 63 | { "all", no_argument, NULL, 'a' }, |
1968a360 | 64 | { NULL, 0, NULL, 0 } |
fa776d8e LP |
65 | }; |
66 | ||
67 | int c; | |
68 | ||
69 | assert(argc >= 1); | |
70 | assert(argv); | |
71 | ||
c3175a7f | 72 | while ((c = getopt_long(argc, argv, "hka", options, NULL)) >= 0) { |
fa776d8e LP |
73 | |
74 | switch (c) { | |
75 | ||
76 | case 'h': | |
77 | help(); | |
78 | return 0; | |
79 | ||
c3175a7f LP |
80 | case ARG_VERSION: |
81 | puts(PACKAGE_STRING); | |
82 | puts(DISTRIBUTION); | |
83 | puts(SYSTEMD_FEATURES); | |
84 | return 0; | |
85 | ||
1968a360 LP |
86 | case ARG_NO_PAGER: |
87 | arg_no_pager = true; | |
88 | break; | |
89 | ||
c3175a7f LP |
90 | case 'a': |
91 | arg_all = true; | |
92 | break; | |
93 | ||
1e5678d0 LP |
94 | case 'k': |
95 | arg_kernel_threads = true; | |
96 | break; | |
97 | ||
fa776d8e LP |
98 | case '?': |
99 | return -EINVAL; | |
100 | ||
101 | default: | |
102 | log_error("Unknown option code %c", c); | |
103 | return -EINVAL; | |
104 | } | |
105 | } | |
106 | ||
107 | return 1; | |
108 | } | |
109 | ||
110 | int main(int argc, char *argv[]) { | |
22f4096c | 111 | int r = 0, retval = EXIT_FAILURE; |
fa776d8e LP |
112 | |
113 | log_parse_environment(); | |
2396fb04 | 114 | log_open(); |
fa776d8e | 115 | |
1e5678d0 LP |
116 | r = parse_argv(argc, argv); |
117 | if (r < 0) | |
fa776d8e LP |
118 | goto finish; |
119 | else if (r == 0) { | |
22f4096c | 120 | retval = EXIT_SUCCESS; |
fa776d8e LP |
121 | goto finish; |
122 | } | |
123 | ||
1968a360 LP |
124 | if (!arg_no_pager) |
125 | pager_open(); | |
126 | ||
fa776d8e LP |
127 | if (optind < argc) { |
128 | unsigned i; | |
129 | ||
130 | for (i = (unsigned) optind; i < (unsigned) argc; i++) { | |
131 | int q; | |
132 | printf("%s:\n", argv[i]); | |
133 | ||
c3175a7f | 134 | q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads, arg_all); |
1e5678d0 | 135 | if (q < 0) |
fa776d8e LP |
136 | r = q; |
137 | } | |
138 | ||
139 | } else { | |
140 | char *p; | |
141 | ||
1e5678d0 LP |
142 | p = get_current_dir_name(); |
143 | if (!p) { | |
fa776d8e LP |
144 | log_error("Cannot determine current working directory: %m"); |
145 | goto finish; | |
146 | } | |
147 | ||
77d5f105 | 148 | if (path_startswith(p, "/sys/fs/cgroup")) { |
fa776d8e | 149 | printf("Working Directory %s:\n", p); |
c3175a7f | 150 | r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads, arg_all); |
1f16b4a6 LP |
151 | } else { |
152 | char *root = NULL; | |
153 | const char *t = NULL; | |
154 | ||
1e5678d0 LP |
155 | r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &root); |
156 | if (r < 0) | |
1f16b4a6 | 157 | t = "/"; |
b9a8e638 LP |
158 | else { |
159 | if (endswith(root, "/system")) | |
160 | root[strlen(root)-7] = 0; | |
161 | ||
162 | t = root[0] ? root : "/"; | |
163 | } | |
1f16b4a6 | 164 | |
c3175a7f | 165 | r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads, arg_all); |
1f16b4a6 LP |
166 | free(root); |
167 | } | |
fa776d8e LP |
168 | |
169 | free(p); | |
170 | } | |
171 | ||
172 | if (r < 0) | |
173 | log_error("Failed to list cgroup tree: %s", strerror(-r)); | |
174 | ||
22f4096c | 175 | retval = EXIT_SUCCESS; |
fa776d8e LP |
176 | |
177 | finish: | |
1968a360 | 178 | pager_close(); |
fa776d8e LP |
179 | |
180 | return retval; | |
181 | } |