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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 | ||
fa776d8e LP |
22 | #include <errno.h> |
23 | #include <getopt.h> | |
3f6fd1ba | 24 | #include <stdio.h> |
fa776d8e | 25 | #include <string.h> |
3f6fd1ba LP |
26 | #include <unistd.h> |
27 | ||
28 | #include "sd-bus.h" | |
fa776d8e | 29 | |
b5efdb8a | 30 | #include "alloc-util.h" |
3f6fd1ba LP |
31 | #include "bus-error.h" |
32 | #include "bus-util.h" | |
fa776d8e | 33 | #include "cgroup-show.h" |
c6c18be3 | 34 | #include "cgroup-util.h" |
3f6fd1ba | 35 | #include "fileio.h" |
fa776d8e | 36 | #include "log.h" |
9bdbc2e2 | 37 | #include "output-mode.h" |
3f6fd1ba LP |
38 | #include "pager.h" |
39 | #include "path-util.h" | |
13be4979 | 40 | #include "unit-name.h" |
3f6fd1ba | 41 | #include "util.h" |
1968a360 LP |
42 | |
43 | static bool arg_no_pager = false; | |
1e5678d0 | 44 | static bool arg_kernel_threads = false; |
c3175a7f | 45 | static bool arg_all = false; |
9bdbc2e2 | 46 | static int arg_full = -1; |
38158b92 | 47 | static char* arg_machine = NULL; |
fa776d8e | 48 | |
601185b4 | 49 | static void help(void) { |
fa776d8e LP |
50 | printf("%s [OPTIONS...] [CGROUP...]\n\n" |
51 | "Recursively show control group contents.\n\n" | |
69fc152f | 52 | " -h --help Show this help\n" |
c3175a7f | 53 | " --version Show package version\n" |
1e5678d0 | 54 | " --no-pager Do not pipe output into a pager\n" |
c3175a7f | 55 | " -a --all Show all groups, including empty\n" |
98a6e132 | 56 | " -l --full Do not ellipsize output\n" |
38158b92 | 57 | " -k Include kernel threads in output\n" |
e049fa16 | 58 | " -M --machine= Show container\n" |
601185b4 | 59 | , program_invocation_short_name); |
fa776d8e LP |
60 | } |
61 | ||
62 | static int parse_argv(int argc, char *argv[]) { | |
63 | ||
1968a360 | 64 | enum { |
c3175a7f | 65 | ARG_NO_PAGER = 0x100, |
9bdbc2e2 | 66 | ARG_VERSION, |
1968a360 LP |
67 | }; |
68 | ||
fa776d8e | 69 | static const struct option options[] = { |
1968a360 | 70 | { "help", no_argument, NULL, 'h' }, |
c3175a7f | 71 | { "version", no_argument, NULL, ARG_VERSION }, |
1968a360 | 72 | { "no-pager", no_argument, NULL, ARG_NO_PAGER }, |
c3175a7f | 73 | { "all", no_argument, NULL, 'a' }, |
98a6e132 | 74 | { "full", no_argument, NULL, 'l' }, |
38158b92 | 75 | { "machine", required_argument, NULL, 'M' }, |
eb9da376 | 76 | {} |
fa776d8e LP |
77 | }; |
78 | ||
79 | int c; | |
80 | ||
81 | assert(argc >= 1); | |
82 | assert(argv); | |
83 | ||
601185b4 | 84 | while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0) |
fa776d8e LP |
85 | |
86 | switch (c) { | |
87 | ||
88 | case 'h': | |
601185b4 ZJS |
89 | help(); |
90 | return 0; | |
fa776d8e | 91 | |
c3175a7f | 92 | case ARG_VERSION: |
3f6fd1ba | 93 | return version(); |
c3175a7f | 94 | |
1968a360 LP |
95 | case ARG_NO_PAGER: |
96 | arg_no_pager = true; | |
97 | break; | |
98 | ||
c3175a7f LP |
99 | case 'a': |
100 | arg_all = true; | |
101 | break; | |
102 | ||
98a6e132 | 103 | case 'l': |
9bdbc2e2 LN |
104 | arg_full = true; |
105 | break; | |
106 | ||
1e5678d0 LP |
107 | case 'k': |
108 | arg_kernel_threads = true; | |
109 | break; | |
110 | ||
38158b92 ZJS |
111 | case 'M': |
112 | arg_machine = optarg; | |
113 | break; | |
114 | ||
fa776d8e LP |
115 | case '?': |
116 | return -EINVAL; | |
117 | ||
118 | default: | |
eb9da376 | 119 | assert_not_reached("Unhandled option"); |
fa776d8e | 120 | } |
fa776d8e LP |
121 | |
122 | return 1; | |
123 | } | |
124 | ||
e049fa16 LP |
125 | static int get_cgroup_root(char **ret) { |
126 | _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; | |
03976f7b | 127 | _cleanup_bus_flush_close_unref_ sd_bus *bus = NULL; |
e049fa16 LP |
128 | _cleanup_free_ char *unit = NULL, *path = NULL; |
129 | const char *m; | |
130 | int r; | |
131 | ||
132 | if (!arg_machine) { | |
133 | r = cg_get_root_path(ret); | |
134 | if (r < 0) | |
135 | return log_error_errno(r, "Failed to get root control group path: %m"); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | ||
140 | m = strjoina("/run/systemd/machines/", arg_machine); | |
141 | r = parse_env_file(m, NEWLINE, "SCOPE", &unit, NULL); | |
142 | if (r < 0) | |
143 | return log_error_errno(r, "Failed to load machine data: %m"); | |
144 | ||
145 | path = unit_dbus_path_from_name(unit); | |
146 | if (!path) | |
147 | return log_oom(); | |
148 | ||
266f3e26 | 149 | r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus); |
e049fa16 LP |
150 | if (r < 0) |
151 | return log_error_errno(r, "Failed to create bus connection: %m"); | |
152 | ||
153 | r = sd_bus_get_property_string( | |
154 | bus, | |
155 | "org.freedesktop.systemd1", | |
156 | path, | |
157 | unit_dbus_interface_from_name(unit), | |
158 | "ControlGroup", | |
159 | &error, | |
160 | ret); | |
161 | if (r < 0) | |
cb88a0a4 | 162 | return log_error_errno(r, "Failed to query unit control group path: %s", bus_error_message(&error, r)); |
e049fa16 LP |
163 | |
164 | return 0; | |
165 | } | |
166 | ||
58033c91 EV |
167 | static void show_cg_info(const char *controller, const char *path) { |
168 | if (cg_unified() <= 0) | |
169 | printf("Controller %s; ", controller); | |
170 | printf("Control group %s:\n", isempty(path) ? "/" : path); | |
171 | fflush(stdout); | |
172 | } | |
173 | ||
e049fa16 LP |
174 | int main(int argc, char *argv[]) { |
175 | int r, output_flags; | |
fa776d8e LP |
176 | |
177 | log_parse_environment(); | |
2396fb04 | 178 | log_open(); |
fa776d8e | 179 | |
1e5678d0 | 180 | r = parse_argv(argc, argv); |
e049fa16 | 181 | if (r <= 0) |
fa776d8e | 182 | goto finish; |
fa776d8e | 183 | |
9bdbc2e2 | 184 | if (!arg_no_pager) { |
1b12a7b5 | 185 | r = pager_open(false); |
e049fa16 LP |
186 | if (r > 0 && arg_full < 0) |
187 | arg_full = true; | |
9bdbc2e2 LN |
188 | } |
189 | ||
190 | output_flags = | |
191 | arg_all * OUTPUT_SHOW_ALL | | |
192 | (arg_full > 0) * OUTPUT_FULL_WIDTH; | |
1968a360 | 193 | |
fa776d8e | 194 | if (optind < argc) { |
e049fa16 | 195 | _cleanup_free_ char *root = NULL; |
38158b92 | 196 | int i; |
fa776d8e | 197 | |
e049fa16 LP |
198 | r = get_cgroup_root(&root); |
199 | if (r < 0) | |
200 | goto finish; | |
201 | ||
38158b92 | 202 | for (i = optind; i < argc; i++) { |
fa776d8e | 203 | int q; |
baa89da4 | 204 | |
e049fa16 | 205 | if (path_startswith(argv[i], "/sys/fs/cgroup")) { |
fa776d8e | 206 | |
e049fa16 LP |
207 | printf("Directory %s:\n", argv[i]); |
208 | fflush(stdout); | |
fa776d8e | 209 | |
e049fa16 LP |
210 | q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads, output_flags); |
211 | } else { | |
212 | _cleanup_free_ char *c = NULL, *p = NULL, *j = NULL; | |
213 | const char *controller, *path; | |
fa776d8e | 214 | |
e049fa16 | 215 | r = cg_split_spec(argv[i], &c, &p); |
13be4979 | 216 | if (r < 0) { |
e049fa16 | 217 | log_error_errno(r, "Failed to split argument %s: %m", argv[i]); |
13be4979 LN |
218 | goto finish; |
219 | } | |
220 | ||
e049fa16 LP |
221 | controller = c ?: SYSTEMD_CGROUP_CONTROLLER; |
222 | if (p) { | |
223 | j = strjoin(root, "/", p, NULL); | |
224 | if (!j) { | |
225 | r = log_oom(); | |
226 | goto finish; | |
227 | } | |
13be4979 | 228 | |
e049fa16 LP |
229 | path_kill_slashes(j); |
230 | path = j; | |
231 | } else | |
232 | path = root; | |
13be4979 | 233 | |
58033c91 | 234 | show_cg_info(controller, path); |
13be4979 | 235 | |
e049fa16 LP |
236 | q = show_cgroup(controller, path, NULL, 0, arg_kernel_threads, output_flags); |
237 | } | |
13be4979 | 238 | |
e049fa16 LP |
239 | if (q < 0) |
240 | r = q; | |
241 | } | |
242 | ||
243 | } else { | |
244 | bool done = false; | |
13be4979 | 245 | |
e049fa16 LP |
246 | if (!arg_machine) { |
247 | _cleanup_free_ char *cwd = NULL; | |
248 | ||
249 | cwd = get_current_dir_name(); | |
250 | if (!cwd) { | |
251 | r = log_error_errno(errno, "Cannot determine current working directory: %m"); | |
7027ff61 | 252 | goto finish; |
b9a8e638 | 253 | } |
1f16b4a6 | 254 | |
e049fa16 LP |
255 | if (path_startswith(cwd, "/sys/fs/cgroup")) { |
256 | printf("Working directory %s:\n", cwd); | |
257 | fflush(stdout); | |
258 | ||
259 | r = show_cgroup_by_path(cwd, NULL, 0, arg_kernel_threads, output_flags); | |
260 | done = true; | |
261 | } | |
262 | } | |
263 | ||
264 | if (!done) { | |
265 | _cleanup_free_ char *root = NULL; | |
266 | ||
267 | r = get_cgroup_root(&root); | |
268 | if (r < 0) | |
269 | goto finish; | |
270 | ||
58033c91 | 271 | show_cg_info(SYSTEMD_CGROUP_CONTROLLER, root); |
e049fa16 LP |
272 | |
273 | r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0, arg_kernel_threads, output_flags); | |
1f16b4a6 | 274 | } |
fa776d8e LP |
275 | } |
276 | ||
e049fa16 LP |
277 | if (r < 0) |
278 | log_error_errno(r, "Failed to list cgroup tree: %m"); | |
fa776d8e LP |
279 | |
280 | finish: | |
1968a360 | 281 | pager_close(); |
fa776d8e | 282 | |
e049fa16 | 283 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; |
fa776d8e | 284 | } |