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53e1b683 | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
ab35fb1b LP |
2 | /*** |
3 | This file is part of systemd. | |
4 | ||
5 | Copyright 2010 Lennart Poettering | |
6 | ||
7 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
8 | under the terms of the GNU Lesser General Public License as published by |
9 | the Free Software Foundation; either version 2.1 of the License, or | |
ab35fb1b LP |
10 | (at your option) any later version. |
11 | ||
12 | systemd is distributed in the hope that it will be useful, but | |
13 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 15 | Lesser General Public License for more details. |
ab35fb1b | 16 | |
5430f7f2 | 17 | You should have received a copy of the GNU Lesser General Public License |
ab35fb1b LP |
18 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
19 | ***/ | |
20 | ||
fa776d8e LP |
21 | #include <dirent.h> |
22 | #include <errno.h> | |
a8fbdf54 | 23 | #include <stddef.h> |
07630cea | 24 | #include <stdio.h> |
a8fbdf54 | 25 | #include <stdlib.h> |
07630cea | 26 | #include <string.h> |
ab35fb1b | 27 | |
b5efdb8a | 28 | #include "alloc-util.h" |
049cb73b ZJS |
29 | #include "bus-error.h" |
30 | #include "bus-util.h" | |
3ffd4af2 | 31 | #include "cgroup-show.h" |
07630cea | 32 | #include "cgroup-util.h" |
3ffd4af2 | 33 | #include "fd-util.h" |
049cb73b | 34 | #include "fileio.h" |
f97b34a6 | 35 | #include "format-util.h" |
8752c575 | 36 | #include "locale-util.h" |
ab35fb1b | 37 | #include "macro.h" |
a8fbdf54 | 38 | #include "output-mode.h" |
9eb977db | 39 | #include "path-util.h" |
07630cea LP |
40 | #include "process-util.h" |
41 | #include "string-util.h" | |
288a74cc | 42 | #include "terminal-util.h" |
049cb73b | 43 | #include "unit-name.h" |
ab35fb1b | 44 | |
0ff308c8 LP |
45 | static void show_pid_array( |
46 | pid_t pids[], | |
47 | unsigned n_pids, | |
48 | const char *prefix, | |
49 | unsigned n_columns, | |
50 | bool extra, | |
51 | bool more, | |
52 | OutputFlags flags) { | |
53 | ||
3da7a50f | 54 | unsigned i, j, pid_width; |
b69d29ce | 55 | |
da41abc5 | 56 | if (n_pids == 0) |
3637713a LP |
57 | return; |
58 | ||
291d565a | 59 | qsort(pids, n_pids, sizeof(pid_t), pid_compare_func); |
b69d29ce | 60 | |
3da7a50f ZJS |
61 | /* Filter duplicates */ |
62 | for (j = 0, i = 1; i < n_pids; i++) { | |
63 | if (pids[i] == pids[j]) | |
64 | continue; | |
65 | pids[++j] = pids[i]; | |
b69d29ce | 66 | } |
3da7a50f ZJS |
67 | n_pids = j + 1; |
68 | pid_width = DECIMAL_STR_WIDTH(pids[j]); | |
b69d29ce | 69 | |
b47d419c | 70 | if (flags & OUTPUT_FULL_WIDTH) |
9bdbc2e2 LN |
71 | n_columns = 0; |
72 | else { | |
73 | if (n_columns > pid_width+2) | |
74 | n_columns -= pid_width+2; | |
75 | else | |
76 | n_columns = 20; | |
77 | } | |
b69d29ce | 78 | for (i = 0; i < n_pids; i++) { |
b47d419c | 79 | _cleanup_free_ char *t = NULL; |
b69d29ce | 80 | |
db284505 | 81 | (void) get_process_cmdline(pids[i], n_columns, true, &t); |
b69d29ce | 82 | |
6b01f1d3 | 83 | if (extra) |
323b7dc9 | 84 | printf("%s%s ", prefix, special_glyph(TRIANGULAR_BULLET)); |
6b01f1d3 | 85 | else |
323b7dc9 | 86 | printf("%s%s", prefix, special_glyph(((more || i < n_pids-1) ? TREE_BRANCH : TREE_RIGHT))); |
6b01f1d3 | 87 | |
3da7a50f | 88 | printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t)); |
b69d29ce LP |
89 | } |
90 | } | |
91 | ||
291d565a LP |
92 | static int show_cgroup_one_by_path( |
93 | const char *path, | |
94 | const char *prefix, | |
95 | unsigned n_columns, | |
96 | bool more, | |
291d565a | 97 | OutputFlags flags) { |
b69d29ce | 98 | |
ab35fb1b | 99 | char *fn; |
7027ff61 | 100 | _cleanup_fclose_ FILE *f = NULL; |
ab35fb1b | 101 | size_t n = 0, n_allocated = 0; |
7027ff61 | 102 | _cleanup_free_ pid_t *pids = NULL; |
b47d419c | 103 | _cleanup_free_ char *p = NULL; |
b69d29ce | 104 | pid_t pid; |
fa776d8e | 105 | int r; |
ab35fb1b | 106 | |
7027ff61 | 107 | r = cg_mangle_path(path, &p); |
b69d29ce | 108 | if (r < 0) |
35d2e7ec | 109 | return r; |
ab35fb1b | 110 | |
63c372cb | 111 | fn = strjoina(p, "/cgroup.procs"); |
fa776d8e | 112 | f = fopen(fn, "re"); |
ab35fb1b | 113 | if (!f) |
fa776d8e | 114 | return -errno; |
ab35fb1b | 115 | |
c6c18be3 | 116 | while ((r = cg_read_pid(f, &pid)) > 0) { |
ab35fb1b | 117 | |
0ff308c8 | 118 | if (!(flags & OUTPUT_KERNEL_THREADS) && is_kernel_thread(pid) > 0) |
1e5678d0 LP |
119 | continue; |
120 | ||
3da7a50f ZJS |
121 | if (!GREEDY_REALLOC(pids, n_allocated, n + 1)) |
122 | return -ENOMEM; | |
ab35fb1b LP |
123 | |
124 | assert(n < n_allocated); | |
c6c18be3 | 125 | pids[n++] = pid; |
ab35fb1b LP |
126 | } |
127 | ||
c6c18be3 | 128 | if (r < 0) |
7027ff61 | 129 | return r; |
c6c18be3 | 130 | |
0ff308c8 | 131 | show_pid_array(pids, n, prefix, n_columns, false, more, flags); |
ab35fb1b | 132 | |
7027ff61 | 133 | return 0; |
fa776d8e LP |
134 | } |
135 | ||
291d565a LP |
136 | int show_cgroup_by_path( |
137 | const char *path, | |
138 | const char *prefix, | |
139 | unsigned n_columns, | |
291d565a LP |
140 | OutputFlags flags) { |
141 | ||
7027ff61 LP |
142 | _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL; |
143 | _cleanup_closedir_ DIR *d = NULL; | |
144 | char *gn = NULL; | |
fa776d8e LP |
145 | bool shown_pids = false; |
146 | int r; | |
147 | ||
b69d29ce LP |
148 | assert(path); |
149 | ||
fa776d8e LP |
150 | if (n_columns <= 0) |
151 | n_columns = columns(); | |
152 | ||
291d565a | 153 | prefix = strempty(prefix); |
fa776d8e | 154 | |
7027ff61 | 155 | r = cg_mangle_path(path, &fn); |
c3175a7f | 156 | if (r < 0) |
35d2e7ec | 157 | return r; |
fa776d8e | 158 | |
c3175a7f | 159 | d = opendir(fn); |
7027ff61 | 160 | if (!d) |
fa776d8e | 161 | return -errno; |
fa776d8e | 162 | |
35d2e7ec | 163 | while ((r = cg_read_subgroup(d, &gn)) > 0) { |
7027ff61 | 164 | _cleanup_free_ char *k = NULL; |
c3175a7f | 165 | |
605405c6 | 166 | k = strjoin(fn, "/", gn); |
c3175a7f | 167 | free(gn); |
7027ff61 LP |
168 | if (!k) |
169 | return -ENOMEM; | |
c3175a7f | 170 | |
6f883237 | 171 | if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k) > 0) |
c3175a7f | 172 | continue; |
fa776d8e LP |
173 | |
174 | if (!shown_pids) { | |
0ff308c8 | 175 | show_cgroup_one_by_path(path, prefix, n_columns, true, flags); |
fa776d8e LP |
176 | shown_pids = true; |
177 | } | |
178 | ||
179 | if (last) { | |
323b7dc9 | 180 | printf("%s%s%s\n", prefix, special_glyph(TREE_BRANCH), cg_unescape(basename(last))); |
fa776d8e | 181 | |
c3175a7f | 182 | if (!p1) { |
323b7dc9 | 183 | p1 = strappend(prefix, special_glyph(TREE_VERTICAL)); |
7027ff61 LP |
184 | if (!p1) |
185 | return -ENOMEM; | |
c3175a7f | 186 | } |
fa776d8e | 187 | |
0ff308c8 | 188 | show_cgroup_by_path(last, p1, n_columns-2, flags); |
fa776d8e | 189 | free(last); |
fa776d8e LP |
190 | } |
191 | ||
ae2a15bc | 192 | last = TAKE_PTR(k); |
fa776d8e LP |
193 | } |
194 | ||
35d2e7ec | 195 | if (r < 0) |
7027ff61 | 196 | return r; |
35d2e7ec | 197 | |
fa776d8e | 198 | if (!shown_pids) |
0ff308c8 | 199 | show_cgroup_one_by_path(path, prefix, n_columns, !!last, flags); |
fa776d8e LP |
200 | |
201 | if (last) { | |
323b7dc9 | 202 | printf("%s%s%s\n", prefix, special_glyph(TREE_RIGHT), cg_unescape(basename(last))); |
fa776d8e | 203 | |
c3175a7f LP |
204 | if (!p2) { |
205 | p2 = strappend(prefix, " "); | |
7027ff61 LP |
206 | if (!p2) |
207 | return -ENOMEM; | |
c3175a7f | 208 | } |
fa776d8e | 209 | |
0ff308c8 | 210 | show_cgroup_by_path(last, p2, n_columns-2, flags); |
fa776d8e LP |
211 | } |
212 | ||
7027ff61 | 213 | return 0; |
ab35fb1b | 214 | } |
35d2e7ec | 215 | |
291d565a LP |
216 | int show_cgroup(const char *controller, |
217 | const char *path, | |
218 | const char *prefix, | |
219 | unsigned n_columns, | |
291d565a | 220 | OutputFlags flags) { |
7027ff61 | 221 | _cleanup_free_ char *p = NULL; |
35d2e7ec LP |
222 | int r; |
223 | ||
35d2e7ec LP |
224 | assert(path); |
225 | ||
1e5678d0 LP |
226 | r = cg_get_path(controller, path, NULL, &p); |
227 | if (r < 0) | |
35d2e7ec LP |
228 | return r; |
229 | ||
0ff308c8 | 230 | return show_cgroup_by_path(p, prefix, n_columns, flags); |
35d2e7ec | 231 | } |
b69d29ce | 232 | |
291d565a LP |
233 | static int show_extra_pids( |
234 | const char *controller, | |
235 | const char *path, | |
236 | const char *prefix, | |
237 | unsigned n_columns, | |
238 | const pid_t pids[], | |
239 | unsigned n_pids, | |
240 | OutputFlags flags) { | |
241 | ||
7fd1b19b | 242 | _cleanup_free_ pid_t *copy = NULL; |
b69d29ce LP |
243 | unsigned i, j; |
244 | int r; | |
245 | ||
b69d29ce LP |
246 | assert(path); |
247 | ||
248 | if (n_pids <= 0) | |
249 | return 0; | |
250 | ||
251 | if (n_columns <= 0) | |
252 | n_columns = columns(); | |
253 | ||
7027ff61 | 254 | prefix = strempty(prefix); |
b69d29ce LP |
255 | |
256 | copy = new(pid_t, n_pids); | |
257 | if (!copy) | |
258 | return -ENOMEM; | |
259 | ||
260 | for (i = 0, j = 0; i < n_pids; i++) { | |
7fd1b19b | 261 | _cleanup_free_ char *k = NULL; |
b69d29ce | 262 | |
7027ff61 | 263 | r = cg_pid_get_path(controller, pids[i], &k); |
050fbdb8 | 264 | if (r < 0) |
b69d29ce | 265 | return r; |
b69d29ce LP |
266 | |
267 | if (path_startswith(k, path)) | |
268 | continue; | |
269 | ||
270 | copy[j++] = pids[i]; | |
271 | } | |
272 | ||
0ff308c8 | 273 | show_pid_array(copy, j, prefix, n_columns, true, false, flags); |
b69d29ce | 274 | |
b69d29ce LP |
275 | return 0; |
276 | } | |
277 | ||
291d565a LP |
278 | int show_cgroup_and_extra( |
279 | const char *controller, | |
280 | const char *path, | |
281 | const char *prefix, | |
282 | unsigned n_columns, | |
291d565a LP |
283 | const pid_t extra_pids[], |
284 | unsigned n_extra_pids, | |
285 | OutputFlags flags) { | |
286 | ||
b69d29ce LP |
287 | int r; |
288 | ||
b69d29ce LP |
289 | assert(path); |
290 | ||
0ff308c8 | 291 | r = show_cgroup(controller, path, prefix, n_columns, flags); |
b69d29ce LP |
292 | if (r < 0) |
293 | return r; | |
294 | ||
9bdbc2e2 | 295 | return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags); |
b69d29ce LP |
296 | } |
297 | ||
291d565a LP |
298 | int show_cgroup_and_extra_by_spec( |
299 | const char *spec, | |
300 | const char *prefix, | |
301 | unsigned n_columns, | |
291d565a LP |
302 | const pid_t extra_pids[], |
303 | unsigned n_extra_pids, | |
304 | OutputFlags flags) { | |
305 | ||
b08121d0 | 306 | _cleanup_free_ char *controller = NULL, *path = NULL; |
7027ff61 | 307 | int r; |
b69d29ce LP |
308 | |
309 | assert(spec); | |
310 | ||
311 | r = cg_split_spec(spec, &controller, &path); | |
312 | if (r < 0) | |
313 | return r; | |
314 | ||
0ff308c8 | 315 | return show_cgroup_and_extra(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags); |
b69d29ce | 316 | } |
049cb73b | 317 | |
bc06be75 ZJS |
318 | int show_cgroup_get_unit_path_and_warn( |
319 | sd_bus *bus, | |
320 | const char *unit, | |
321 | char **ret) { | |
322 | ||
323 | _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL; | |
324 | _cleanup_free_ char *path = NULL; | |
325 | int r; | |
326 | ||
327 | path = unit_dbus_path_from_name(unit); | |
328 | if (!path) | |
329 | return log_oom(); | |
330 | ||
331 | r = sd_bus_get_property_string( | |
332 | bus, | |
333 | "org.freedesktop.systemd1", | |
334 | path, | |
335 | unit_dbus_interface_from_name(unit), | |
336 | "ControlGroup", | |
337 | &error, | |
338 | ret); | |
339 | if (r < 0) | |
340 | return log_error_errno(r, "Failed to query unit control group path: %s", | |
341 | bus_error_message(&error, r)); | |
342 | ||
343 | return 0; | |
344 | } | |
345 | ||
d3e8277d | 346 | int show_cgroup_get_path_and_warn( |
049cb73b | 347 | const char *machine, |
d3e8277d | 348 | const char *prefix, |
049cb73b ZJS |
349 | char **ret) { |
350 | ||
049cb73b | 351 | int r; |
d3e8277d ZJS |
352 | _cleanup_free_ char *root = NULL; |
353 | ||
354 | if (machine) { | |
d3e8277d | 355 | _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL; |
bc06be75 | 356 | _cleanup_free_ char *unit = NULL; |
d3e8277d ZJS |
357 | const char *m; |
358 | ||
359 | m = strjoina("/run/systemd/machines/", machine); | |
360 | r = parse_env_file(m, NEWLINE, "SCOPE", &unit, NULL); | |
361 | if (r < 0) | |
362 | return log_error_errno(r, "Failed to load machine data: %m"); | |
049cb73b | 363 | |
d3e8277d ZJS |
364 | r = bus_connect_transport_systemd(BUS_TRANSPORT_LOCAL, NULL, false, &bus); |
365 | if (r < 0) | |
366 | return log_error_errno(r, "Failed to create bus connection: %m"); | |
367 | ||
bc06be75 | 368 | r = show_cgroup_get_unit_path_and_warn(bus, unit, &root); |
d3e8277d | 369 | if (r < 0) |
bc06be75 | 370 | return r; |
d3e8277d ZJS |
371 | } else { |
372 | r = cg_get_root_path(&root); | |
049cb73b ZJS |
373 | if (r == -ENOMEDIUM) |
374 | return log_error_errno(r, "Failed to get root control group path.\n" | |
375 | "No cgroup filesystem mounted on /sys/fs/cgroup"); | |
376 | else if (r < 0) | |
377 | return log_error_errno(r, "Failed to get root control group path: %m"); | |
049cb73b ZJS |
378 | } |
379 | ||
d3e8277d ZJS |
380 | if (prefix) { |
381 | char *t; | |
049cb73b | 382 | |
d3e8277d ZJS |
383 | t = strjoin(root, prefix); |
384 | if (!t) | |
385 | return log_oom(); | |
049cb73b | 386 | |
d3e8277d | 387 | *ret = t; |
1cc6c93a YW |
388 | } else |
389 | *ret = TAKE_PTR(root); | |
049cb73b ZJS |
390 | |
391 | return 0; | |
392 | } |