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(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;
47 qsort(pids, n_pids, sizeof(pid_t), compare);
49 /* Filter duplicates */
50 for (j = 0, i = 1; i < n_pids; i++) {
51 if (pids[i] == pids[j])
56 pid_width = DECIMAL_STR_WIDTH(pids[j]);
58 if (flags & OUTPUT_FULL_WIDTH)
61 if (n_columns > pid_width+2)
62 n_columns -= pid_width+2;
66 for (i = 0; i < n_pids; i++) {
67 _cleanup_free_ char *t = NULL;
69 get_process_cmdline(pids[i], n_columns, true, &t);
72 printf("%s%s ", prefix, draw_special_char(DRAW_TRIANGULAR_BULLET));
74 printf("%s%s", prefix, draw_special_char(((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT)));
76 printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t));
81 static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) {
83 _cleanup_fclose_ FILE *f = NULL;
84 size_t n = 0, n_allocated = 0;
85 _cleanup_free_ pid_t *pids = NULL;
86 _cleanup_free_ char *p = NULL;
90 r = cg_mangle_path(path, &p);
94 fn = strappenda(p, "/cgroup.procs");
99 while ((r = cg_read_pid(f, &pid)) > 0) {
101 if (!kernel_threads && is_kernel_thread(pid) > 0)
104 if (!GREEDY_REALLOC(pids, n_allocated, n + 1))
107 assert(n < n_allocated);
115 show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags);
120 int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
121 _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
122 _cleanup_closedir_ DIR *d = NULL;
124 bool shown_pids = false;
130 n_columns = columns();
135 r = cg_mangle_path(path, &fn);
143 while ((r = cg_read_subgroup(d, &gn)) > 0) {
144 _cleanup_free_ char *k = NULL;
146 k = strjoin(fn, "/", gn, NULL);
151 if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k, false) > 0)
155 show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags);
160 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH),
164 p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERTICAL));
169 show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags);
181 show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags);
184 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT),
188 p2 = strappend(prefix, " ");
193 show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags);
199 int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
200 _cleanup_free_ char *p = NULL;
205 r = cg_get_path(controller, path, NULL, &p);
209 return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags);
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) {
213 _cleanup_free_ pid_t *copy = NULL;
223 n_columns = columns();
225 prefix = strempty(prefix);
227 copy = new(pid_t, n_pids);
231 for (i = 0, j = 0; i < n_pids; i++) {
232 _cleanup_free_ char *k = NULL;
234 r = cg_pid_get_path(controller, pids[i], &k);
238 if (path_startswith(k, path))
244 show_pid_array(copy, j, prefix, n_columns, true, false, false, flags);
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) {
254 r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags);
258 return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
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) {
262 _cleanup_free_ char *controller = NULL, *path = NULL;
267 r = cg_split_spec(spec, &controller, &path);
271 return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags);