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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 | 31 | #include "log.h" |
9eb977db | 32 | #include "path-util.h" |
fa776d8e | 33 | #include "util.h" |
1968a360 | 34 | #include "pager.h" |
c3175a7f | 35 | #include "build.h" |
9bdbc2e2 | 36 | #include "output-mode.h" |
1968a360 LP |
37 | |
38 | static bool arg_no_pager = false; | |
1e5678d0 | 39 | static bool arg_kernel_threads = false; |
c3175a7f | 40 | static bool arg_all = false; |
9bdbc2e2 | 41 | static int arg_full = -1; |
fa776d8e LP |
42 | |
43 | static void help(void) { | |
44 | ||
45 | printf("%s [OPTIONS...] [CGROUP...]\n\n" | |
46 | "Recursively show control group contents.\n\n" | |
69fc152f | 47 | " -h --help Show this help\n" |
c3175a7f | 48 | " --version Show package version\n" |
1e5678d0 | 49 | " --no-pager Do not pipe output into a pager\n" |
c3175a7f | 50 | " -a --all Show all groups, including empty\n" |
9bdbc2e2 | 51 | " --full Do not ellipsize output\n" |
1e5678d0 | 52 | " -k Include kernel threads in output\n", |
fa776d8e LP |
53 | program_invocation_short_name); |
54 | } | |
55 | ||
56 | static int parse_argv(int argc, char *argv[]) { | |
57 | ||
1968a360 | 58 | enum { |
c3175a7f | 59 | ARG_NO_PAGER = 0x100, |
9bdbc2e2 LN |
60 | ARG_VERSION, |
61 | ARG_FULL, | |
1968a360 LP |
62 | }; |
63 | ||
fa776d8e | 64 | static const struct option options[] = { |
1968a360 | 65 | { "help", no_argument, NULL, 'h' }, |
c3175a7f | 66 | { "version", no_argument, NULL, ARG_VERSION }, |
1968a360 | 67 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
c3175a7f | 68 | { "all", no_argument, NULL, 'a' }, |
9bdbc2e2 | 69 | { "full", no_argument, NULL, ARG_FULL }, |
1968a360 | 70 | { NULL, 0, NULL, 0 } |
fa776d8e LP |
71 | }; |
72 | ||
73 | int c; | |
74 | ||
75 | assert(argc >= 1); | |
76 | assert(argv); | |
77 | ||
c3175a7f | 78 | while ((c = getopt_long(argc, argv, "hka", options, NULL)) >= 0) { |
fa776d8e LP |
79 | |
80 | switch (c) { | |
81 | ||
82 | case 'h': | |
83 | help(); | |
84 | return 0; | |
85 | ||
c3175a7f LP |
86 | case ARG_VERSION: |
87 | puts(PACKAGE_STRING); | |
c3175a7f LP |
88 | puts(SYSTEMD_FEATURES); |
89 | return 0; | |
90 | ||
1968a360 LP |
91 | case ARG_NO_PAGER: |
92 | arg_no_pager = true; | |
93 | break; | |
94 | ||
c3175a7f LP |
95 | case 'a': |
96 | arg_all = true; | |
97 | break; | |
98 | ||
9bdbc2e2 LN |
99 | case ARG_FULL: |
100 | arg_full = true; | |
101 | break; | |
102 | ||
1e5678d0 LP |
103 | case 'k': |
104 | arg_kernel_threads = true; | |
105 | break; | |
106 | ||
fa776d8e LP |
107 | case '?': |
108 | return -EINVAL; | |
109 | ||
110 | default: | |
111 | log_error("Unknown option code %c", c); | |
112 | return -EINVAL; | |
113 | } | |
114 | } | |
115 | ||
116 | return 1; | |
117 | } | |
118 | ||
119 | int main(int argc, char *argv[]) { | |
22f4096c | 120 | int r = 0, retval = EXIT_FAILURE; |
9bdbc2e2 | 121 | int output_flags; |
fa776d8e LP |
122 | |
123 | log_parse_environment(); | |
2396fb04 | 124 | log_open(); |
fa776d8e | 125 | |
1e5678d0 LP |
126 | r = parse_argv(argc, argv); |
127 | if (r < 0) | |
fa776d8e LP |
128 | goto finish; |
129 | else if (r == 0) { | |
22f4096c | 130 | retval = EXIT_SUCCESS; |
fa776d8e LP |
131 | goto finish; |
132 | } | |
133 | ||
9bdbc2e2 | 134 | if (!arg_no_pager) { |
1b12a7b5 | 135 | r = pager_open(false); |
9bdbc2e2 LN |
136 | if (r > 0) { |
137 | if (arg_full == -1) | |
138 | arg_full = true; | |
139 | } | |
140 | } | |
141 | ||
142 | output_flags = | |
143 | arg_all * OUTPUT_SHOW_ALL | | |
144 | (arg_full > 0) * OUTPUT_FULL_WIDTH; | |
1968a360 | 145 | |
fa776d8e LP |
146 | if (optind < argc) { |
147 | unsigned i; | |
148 | ||
149 | for (i = (unsigned) optind; i < (unsigned) argc; i++) { | |
150 | int q; | |
151 | printf("%s:\n", argv[i]); | |
152 | ||
9bdbc2e2 LN |
153 | q = show_cgroup_by_path(argv[i], NULL, 0, |
154 | arg_kernel_threads, output_flags); | |
1e5678d0 | 155 | if (q < 0) |
fa776d8e LP |
156 | r = q; |
157 | } | |
158 | ||
159 | } else { | |
6f862a69 | 160 | char _cleanup_free_ *p; |
fa776d8e | 161 | |
1e5678d0 LP |
162 | p = get_current_dir_name(); |
163 | if (!p) { | |
fa776d8e LP |
164 | log_error("Cannot determine current working directory: %m"); |
165 | goto finish; | |
166 | } | |
167 | ||
77d5f105 | 168 | if (path_startswith(p, "/sys/fs/cgroup")) { |
fa776d8e | 169 | printf("Working Directory %s:\n", p); |
9bdbc2e2 LN |
170 | r = show_cgroup_by_path(p, NULL, 0, |
171 | arg_kernel_threads, output_flags); | |
1f16b4a6 | 172 | } else { |
6f862a69 | 173 | char _cleanup_free_ *root = NULL; |
1f16b4a6 | 174 | |
7027ff61 LP |
175 | r = cg_get_root_path(&root); |
176 | if (r < 0) { | |
177 | log_error("Failed to get root path: %s", strerror(-r)); | |
178 | goto finish; | |
b9a8e638 | 179 | } |
1f16b4a6 | 180 | |
7027ff61 | 181 | r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0, |
9bdbc2e2 | 182 | arg_kernel_threads, output_flags); |
1f16b4a6 | 183 | } |
fa776d8e LP |
184 | } |
185 | ||
186 | if (r < 0) | |
187 | log_error("Failed to list cgroup tree: %s", strerror(-r)); | |
188 | ||
22f4096c | 189 | retval = EXIT_SUCCESS; |
fa776d8e LP |
190 | |
191 | finish: | |
1968a360 | 192 | pager_close(); |
fa776d8e LP |
193 | |
194 | return retval; | |
195 | } |