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);
81 printf("%s%s%*lu %s\n",
83 draw_special_char(extra ? DRAW_TRIANGULAR_BULLET :
84 ((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT)),
86 (unsigned long) pids[i],
92 static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) {
94 _cleanup_fclose_ FILE *f = NULL;
95 size_t n = 0, n_allocated = 0;
96 _cleanup_free_ pid_t *pids = NULL;
97 _cleanup_free_ char *p = NULL;
101 r = cg_mangle_path(path, &p);
105 fn = strappenda(p, "/cgroup.procs");
110 while ((r = cg_read_pid(f, &pid)) > 0) {
112 if (!kernel_threads && is_kernel_thread(pid) > 0)
115 if (n >= n_allocated) {
118 n_allocated = MAX(16U, n*2U);
120 npids = realloc(pids, sizeof(pid_t) * n_allocated);
127 assert(n < n_allocated);
135 show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags);
140 int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
141 _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
142 _cleanup_closedir_ DIR *d = NULL;
144 bool shown_pids = false;
150 n_columns = columns();
155 r = cg_mangle_path(path, &fn);
163 while ((r = cg_read_subgroup(d, &gn)) > 0) {
164 _cleanup_free_ char *k = NULL;
166 k = strjoin(fn, "/", gn, NULL);
171 if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k, false) > 0)
175 show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags);
180 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH),
184 p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERT));
189 show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags);
201 show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags);
204 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT),
208 p2 = strappend(prefix, " ");
213 show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags);
219 int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
220 _cleanup_free_ char *p = NULL;
225 r = cg_get_path(controller, path, NULL, &p);
229 return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags);
232 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) {
233 _cleanup_free_ pid_t *copy = NULL;
243 n_columns = columns();
245 prefix = strempty(prefix);
247 copy = new(pid_t, n_pids);
251 for (i = 0, j = 0; i < n_pids; i++) {
252 _cleanup_free_ char *k = NULL;
254 r = cg_pid_get_path(controller, pids[i], &k);
258 if (path_startswith(k, path))
264 show_pid_array(copy, j, prefix, n_columns, true, false, false, flags);
269 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) {
274 r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags);
278 return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
281 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) {
282 _cleanup_free_ char *controller = NULL, *path = NULL;
287 r = cg_split_spec(spec, &controller, &path);
291 return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags);