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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
ab35fb1b 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 | |
ab35fb1b 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. |
ab35fb1b | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
ab35fb1b LP |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
20 | ***/ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <string.h> | |
fa776d8e LP |
24 | #include <dirent.h> |
25 | #include <errno.h> | |
ab35fb1b LP |
26 | |
27 | #include "util.h" | |
28 | #include "macro.h" | |
9eb977db | 29 | #include "path-util.h" |
c6c18be3 | 30 | #include "cgroup-util.h" |
ab35fb1b LP |
31 | #include "cgroup-show.h" |
32 | ||
33 | static int compare(const void *a, const void *b) { | |
34 | const pid_t *p = a, *q = b; | |
35 | ||
36 | if (*p < *q) | |
37 | return -1; | |
38 | if (*p > *q) | |
39 | return 1; | |
40 | return 0; | |
41 | } | |
42 | ||
3da7a50f ZJS |
43 | static void show_pid_array(pid_t pids[], unsigned n_pids, const char *prefix, unsigned n_columns, bool extra, bool more, bool kernel_threads, OutputFlags flags) { |
44 | unsigned i, j, pid_width; | |
b69d29ce | 45 | |
3da7a50f ZJS |
46 | assert(n_pids > 0); |
47 | qsort(pids, n_pids, sizeof(pid_t), compare); | |
b69d29ce | 48 | |
3da7a50f ZJS |
49 | /* Filter duplicates */ |
50 | for (j = 0, i = 1; i < n_pids; i++) { | |
51 | if (pids[i] == pids[j]) | |
52 | continue; | |
53 | pids[++j] = pids[i]; | |
b69d29ce | 54 | } |
3da7a50f ZJS |
55 | n_pids = j + 1; |
56 | pid_width = DECIMAL_STR_WIDTH(pids[j]); | |
b69d29ce | 57 | |
b47d419c | 58 | if (flags & OUTPUT_FULL_WIDTH) |
9bdbc2e2 LN |
59 | n_columns = 0; |
60 | else { | |
61 | if (n_columns > pid_width+2) | |
62 | n_columns -= pid_width+2; | |
63 | else | |
64 | n_columns = 20; | |
65 | } | |
b69d29ce | 66 | for (i = 0; i < n_pids; i++) { |
b47d419c | 67 | _cleanup_free_ char *t = NULL; |
b69d29ce LP |
68 | |
69 | get_process_cmdline(pids[i], n_columns, true, &t); | |
70 | ||
6b01f1d3 LP |
71 | if (extra) |
72 | printf("%s%s ", prefix, draw_special_char(DRAW_TRIANGULAR_BULLET)); | |
73 | else | |
74 | printf("%s%s", prefix, draw_special_char(((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT))); | |
75 | ||
3da7a50f | 76 | printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t)); |
b69d29ce LP |
77 | } |
78 | } | |
79 | ||
80 | ||
9bdbc2e2 | 81 | static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) { |
ab35fb1b | 82 | char *fn; |
7027ff61 | 83 | _cleanup_fclose_ FILE *f = NULL; |
ab35fb1b | 84 | size_t n = 0, n_allocated = 0; |
7027ff61 | 85 | _cleanup_free_ pid_t *pids = NULL; |
b47d419c | 86 | _cleanup_free_ char *p = NULL; |
b69d29ce | 87 | pid_t pid; |
fa776d8e | 88 | int r; |
ab35fb1b | 89 | |
7027ff61 | 90 | r = cg_mangle_path(path, &p); |
b69d29ce | 91 | if (r < 0) |
35d2e7ec | 92 | return r; |
ab35fb1b | 93 | |
b47d419c | 94 | fn = strappenda(p, "/cgroup.procs"); |
fa776d8e | 95 | f = fopen(fn, "re"); |
ab35fb1b | 96 | if (!f) |
fa776d8e | 97 | return -errno; |
ab35fb1b | 98 | |
c6c18be3 | 99 | while ((r = cg_read_pid(f, &pid)) > 0) { |
ab35fb1b | 100 | |
1e5678d0 LP |
101 | if (!kernel_threads && is_kernel_thread(pid) > 0) |
102 | continue; | |
103 | ||
3da7a50f ZJS |
104 | if (!GREEDY_REALLOC(pids, n_allocated, n + 1)) |
105 | return -ENOMEM; | |
ab35fb1b LP |
106 | |
107 | assert(n < n_allocated); | |
c6c18be3 | 108 | pids[n++] = pid; |
ab35fb1b LP |
109 | } |
110 | ||
c6c18be3 | 111 | if (r < 0) |
7027ff61 | 112 | return r; |
c6c18be3 | 113 | |
b69d29ce | 114 | if (n > 0) |
9bdbc2e2 | 115 | show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags); |
ab35fb1b | 116 | |
7027ff61 | 117 | return 0; |
fa776d8e LP |
118 | } |
119 | ||
9bdbc2e2 | 120 | int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) { |
7027ff61 LP |
121 | _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL; |
122 | _cleanup_closedir_ DIR *d = NULL; | |
123 | char *gn = NULL; | |
fa776d8e LP |
124 | bool shown_pids = false; |
125 | int r; | |
126 | ||
b69d29ce LP |
127 | assert(path); |
128 | ||
fa776d8e LP |
129 | if (n_columns <= 0) |
130 | n_columns = columns(); | |
131 | ||
132 | if (!prefix) | |
133 | prefix = ""; | |
134 | ||
7027ff61 | 135 | r = cg_mangle_path(path, &fn); |
c3175a7f | 136 | if (r < 0) |
35d2e7ec | 137 | return r; |
fa776d8e | 138 | |
c3175a7f | 139 | d = opendir(fn); |
7027ff61 | 140 | if (!d) |
fa776d8e | 141 | return -errno; |
fa776d8e | 142 | |
35d2e7ec | 143 | while ((r = cg_read_subgroup(d, &gn)) > 0) { |
7027ff61 | 144 | _cleanup_free_ char *k = NULL; |
c3175a7f | 145 | |
7027ff61 | 146 | k = strjoin(fn, "/", gn, NULL); |
c3175a7f | 147 | free(gn); |
7027ff61 LP |
148 | if (!k) |
149 | return -ENOMEM; | |
c3175a7f | 150 | |
7027ff61 | 151 | if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k, false) > 0) |
c3175a7f | 152 | continue; |
fa776d8e LP |
153 | |
154 | if (!shown_pids) { | |
9bdbc2e2 | 155 | show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags); |
fa776d8e LP |
156 | shown_pids = true; |
157 | } | |
158 | ||
159 | if (last) { | |
45a5ff0d | 160 | printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH), |
2b6bf07d | 161 | basename(last)); |
fa776d8e | 162 | |
c3175a7f | 163 | if (!p1) { |
6b01f1d3 | 164 | p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERTICAL)); |
7027ff61 LP |
165 | if (!p1) |
166 | return -ENOMEM; | |
c3175a7f | 167 | } |
fa776d8e | 168 | |
9bdbc2e2 | 169 | show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags); |
fa776d8e | 170 | free(last); |
fa776d8e LP |
171 | } |
172 | ||
c3175a7f | 173 | last = k; |
7027ff61 | 174 | k = NULL; |
fa776d8e LP |
175 | } |
176 | ||
35d2e7ec | 177 | if (r < 0) |
7027ff61 | 178 | return r; |
35d2e7ec | 179 | |
fa776d8e | 180 | if (!shown_pids) |
9bdbc2e2 | 181 | show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags); |
fa776d8e LP |
182 | |
183 | if (last) { | |
45a5ff0d | 184 | printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT), |
2b6bf07d | 185 | basename(last)); |
fa776d8e | 186 | |
c3175a7f LP |
187 | if (!p2) { |
188 | p2 = strappend(prefix, " "); | |
7027ff61 LP |
189 | if (!p2) |
190 | return -ENOMEM; | |
c3175a7f | 191 | } |
fa776d8e | 192 | |
9bdbc2e2 | 193 | show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags); |
fa776d8e LP |
194 | } |
195 | ||
7027ff61 | 196 | return 0; |
ab35fb1b | 197 | } |
35d2e7ec | 198 | |
9bdbc2e2 | 199 | int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) { |
7027ff61 | 200 | _cleanup_free_ char *p = NULL; |
35d2e7ec LP |
201 | int r; |
202 | ||
35d2e7ec LP |
203 | assert(path); |
204 | ||
1e5678d0 LP |
205 | r = cg_get_path(controller, path, NULL, &p); |
206 | if (r < 0) | |
35d2e7ec LP |
207 | return r; |
208 | ||
7027ff61 | 209 | return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags); |
35d2e7ec | 210 | } |
b69d29ce | 211 | |
9bdbc2e2 | 212 | static int show_extra_pids(const char *controller, const char *path, const char *prefix, unsigned n_columns, const pid_t pids[], unsigned n_pids, OutputFlags flags) { |
7fd1b19b | 213 | _cleanup_free_ pid_t *copy = NULL; |
b69d29ce LP |
214 | unsigned i, j; |
215 | int r; | |
216 | ||
b69d29ce LP |
217 | assert(path); |
218 | ||
219 | if (n_pids <= 0) | |
220 | return 0; | |
221 | ||
222 | if (n_columns <= 0) | |
223 | n_columns = columns(); | |
224 | ||
7027ff61 | 225 | prefix = strempty(prefix); |
b69d29ce LP |
226 | |
227 | copy = new(pid_t, n_pids); | |
228 | if (!copy) | |
229 | return -ENOMEM; | |
230 | ||
231 | for (i = 0, j = 0; i < n_pids; i++) { | |
7fd1b19b | 232 | _cleanup_free_ char *k = NULL; |
b69d29ce | 233 | |
7027ff61 | 234 | r = cg_pid_get_path(controller, pids[i], &k); |
050fbdb8 | 235 | if (r < 0) |
b69d29ce | 236 | return r; |
b69d29ce LP |
237 | |
238 | if (path_startswith(k, path)) | |
239 | continue; | |
240 | ||
241 | copy[j++] = pids[i]; | |
242 | } | |
243 | ||
9bdbc2e2 | 244 | show_pid_array(copy, j, prefix, n_columns, true, false, false, flags); |
b69d29ce | 245 | |
b69d29ce LP |
246 | return 0; |
247 | } | |
248 | ||
9bdbc2e2 | 249 | int show_cgroup_and_extra(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags) { |
b69d29ce LP |
250 | int r; |
251 | ||
b69d29ce LP |
252 | assert(path); |
253 | ||
9bdbc2e2 | 254 | r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags); |
b69d29ce LP |
255 | if (r < 0) |
256 | return r; | |
257 | ||
9bdbc2e2 | 258 | return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags); |
b69d29ce LP |
259 | } |
260 | ||
9bdbc2e2 | 261 | int show_cgroup_and_extra_by_spec(const char *spec, const char *prefix, unsigned n_columns, bool kernel_threads, const pid_t extra_pids[], unsigned n_extra_pids, OutputFlags flags) { |
b08121d0 | 262 | _cleanup_free_ char *controller = NULL, *path = NULL; |
7027ff61 | 263 | int r; |
b69d29ce LP |
264 | |
265 | assert(spec); | |
266 | ||
267 | r = cg_split_spec(spec, &controller, &path); | |
268 | if (r < 0) | |
269 | return r; | |
270 | ||
9bdbc2e2 | 271 | return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags); |
b69d29ce | 272 | } |