1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
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
11 (at your option) any later version.
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
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
29 #include "path-util.h"
30 #include "cgroup-util.h"
31 #include "cgroup-show.h"
33 static int compare(const void *a, const void *b) {
34 const pid_t *p = a, *q = b;
43 static void show_pid_array(int pids[], unsigned n_pids, const char *prefix, unsigned n_columns, bool extra, bool more, bool kernel_threads, OutputFlags flags) {
44 unsigned i, m, pid_width;
47 /* Filter duplicates */
49 for (i = 0; i < n_pids; i++) {
52 if (pids[i] > biggest)
55 for (j = i+1; j < n_pids; j++)
56 if (pids[i] == pids[j])
63 pid_width = DECIMAL_STR_WIDTH(biggest);
66 qsort_safe(pids, n_pids, sizeof(pid_t), compare);
68 if (flags & OUTPUT_FULL_WIDTH)
71 if (n_columns > pid_width+2)
72 n_columns -= pid_width+2;
76 for (i = 0; i < n_pids; i++) {
77 _cleanup_free_ char *t = NULL;
79 get_process_cmdline(pids[i], n_columns, true, &t);
82 printf("%s%s ", prefix, draw_special_char(DRAW_TRIANGULAR_BULLET));
84 printf("%s%s", prefix, draw_special_char(((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT)));
88 (unsigned long) pids[i],
94 static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) {
96 _cleanup_fclose_ FILE *f = NULL;
97 size_t n = 0, n_allocated = 0;
98 _cleanup_free_ pid_t *pids = NULL;
99 _cleanup_free_ char *p = NULL;
103 r = cg_mangle_path(path, &p);
107 fn = strappenda(p, "/cgroup.procs");
112 while ((r = cg_read_pid(f, &pid)) > 0) {
114 if (!kernel_threads && is_kernel_thread(pid) > 0)
117 if (n >= n_allocated) {
120 n_allocated = MAX(16U, n*2U);
122 npids = realloc(pids, sizeof(pid_t) * n_allocated);
129 assert(n < n_allocated);
137 show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags);
142 int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
143 _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
144 _cleanup_closedir_ DIR *d = NULL;
146 bool shown_pids = false;
152 n_columns = columns();
157 r = cg_mangle_path(path, &fn);
165 while ((r = cg_read_subgroup(d, &gn)) > 0) {
166 _cleanup_free_ char *k = NULL;
168 k = strjoin(fn, "/", gn, NULL);
173 if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k, false) > 0)
177 show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags);
182 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH),
186 p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERTICAL));
191 show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags);
203 show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags);
206 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT),
210 p2 = strappend(prefix, " ");
215 show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags);
221 int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
222 _cleanup_free_ char *p = NULL;
227 r = cg_get_path(controller, path, NULL, &p);
231 return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags);
234 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) {
235 _cleanup_free_ pid_t *copy = NULL;
245 n_columns = columns();
247 prefix = strempty(prefix);
249 copy = new(pid_t, n_pids);
253 for (i = 0, j = 0; i < n_pids; i++) {
254 _cleanup_free_ char *k = NULL;
256 r = cg_pid_get_path(controller, pids[i], &k);
260 if (path_startswith(k, path))
266 show_pid_array(copy, j, prefix, n_columns, true, false, false, flags);
271 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) {
276 r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags);
280 return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
283 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) {
284 _cleanup_free_ char *controller = NULL, *path = NULL;
289 r = cg_split_spec(spec, &controller, &path);
293 return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags);