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;
49 qsort(pids, n_pids, sizeof(pid_t), compare);
51 /* Filter duplicates */
52 for (j = 0, i = 1; i < n_pids; i++) {
53 if (pids[i] == pids[j])
58 pid_width = DECIMAL_STR_WIDTH(pids[j]);
60 if (flags & OUTPUT_FULL_WIDTH)
63 if (n_columns > pid_width+2)
64 n_columns -= pid_width+2;
68 for (i = 0; i < n_pids; i++) {
69 _cleanup_free_ char *t = NULL;
71 get_process_cmdline(pids[i], n_columns, true, &t);
74 printf("%s%s ", prefix, draw_special_char(DRAW_TRIANGULAR_BULLET));
76 printf("%s%s", prefix, draw_special_char(((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT)));
78 printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t));
83 static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) {
85 _cleanup_fclose_ FILE *f = NULL;
86 size_t n = 0, n_allocated = 0;
87 _cleanup_free_ pid_t *pids = NULL;
88 _cleanup_free_ char *p = NULL;
92 r = cg_mangle_path(path, &p);
96 fn = strjoina(p, "/cgroup.procs");
101 while ((r = cg_read_pid(f, &pid)) > 0) {
103 if (!kernel_threads && is_kernel_thread(pid) > 0)
106 if (!GREEDY_REALLOC(pids, n_allocated, n + 1))
109 assert(n < n_allocated);
116 show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags);
121 int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
122 _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
123 _cleanup_closedir_ DIR *d = NULL;
125 bool shown_pids = false;
131 n_columns = columns();
136 r = cg_mangle_path(path, &fn);
144 while ((r = cg_read_subgroup(d, &gn)) > 0) {
145 _cleanup_free_ char *k = NULL;
147 k = strjoin(fn, "/", gn, NULL);
152 if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k, false) > 0)
156 show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags);
161 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH),
165 p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERTICAL));
170 show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags);
182 show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags);
185 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT),
189 p2 = strappend(prefix, " ");
194 show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags);
200 int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
201 _cleanup_free_ char *p = NULL;
206 r = cg_get_path(controller, path, NULL, &p);
210 return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags);
213 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) {
214 _cleanup_free_ pid_t *copy = NULL;
224 n_columns = columns();
226 prefix = strempty(prefix);
228 copy = new(pid_t, n_pids);
232 for (i = 0, j = 0; i < n_pids; i++) {
233 _cleanup_free_ char *k = NULL;
235 r = cg_pid_get_path(controller, pids[i], &k);
239 if (path_startswith(k, path))
245 show_pid_array(copy, j, prefix, n_columns, true, false, false, flags);
250 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) {
255 r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags);
259 return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
262 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) {
263 _cleanup_free_ char *controller = NULL, *path = NULL;
268 r = cg_split_spec(spec, &controller, &path);
272 return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags);