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/>.
27 #include "alloc-util.h"
28 #include "cgroup-show.h"
29 #include "cgroup-util.h"
31 #include "formats-util.h"
32 #include "locale-util.h"
34 #include "path-util.h"
35 #include "process-util.h"
36 #include "string-util.h"
37 #include "terminal-util.h"
40 static int compare(const void *a, const void *b) {
41 const pid_t *p = a, *q = b;
50 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) {
51 unsigned i, j, pid_width;
56 qsort(pids, n_pids, sizeof(pid_t), compare);
58 /* Filter duplicates */
59 for (j = 0, i = 1; i < n_pids; i++) {
60 if (pids[i] == pids[j])
65 pid_width = DECIMAL_STR_WIDTH(pids[j]);
67 if (flags & OUTPUT_FULL_WIDTH)
70 if (n_columns > pid_width+2)
71 n_columns -= pid_width+2;
75 for (i = 0; i < n_pids; i++) {
76 _cleanup_free_ char *t = NULL;
78 get_process_cmdline(pids[i], n_columns, true, &t);
81 printf("%s%s ", prefix, draw_special_char(DRAW_TRIANGULAR_BULLET));
83 printf("%s%s", prefix, draw_special_char(((more || i < n_pids-1) ? DRAW_TREE_BRANCH : DRAW_TREE_RIGHT)));
85 printf("%*"PID_PRI" %s\n", pid_width, pids[i], strna(t));
90 static int show_cgroup_one_by_path(const char *path, const char *prefix, unsigned n_columns, bool more, bool kernel_threads, OutputFlags flags) {
92 _cleanup_fclose_ FILE *f = NULL;
93 size_t n = 0, n_allocated = 0;
94 _cleanup_free_ pid_t *pids = NULL;
95 _cleanup_free_ char *p = NULL;
99 r = cg_mangle_path(path, &p);
103 fn = strjoina(p, "/cgroup.procs");
108 while ((r = cg_read_pid(f, &pid)) > 0) {
110 if (!kernel_threads && is_kernel_thread(pid) > 0)
113 if (!GREEDY_REALLOC(pids, n_allocated, n + 1))
116 assert(n < n_allocated);
123 show_pid_array(pids, n, prefix, n_columns, false, more, kernel_threads, flags);
128 int show_cgroup_by_path(const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
129 _cleanup_free_ char *fn = NULL, *p1 = NULL, *last = NULL, *p2 = NULL;
130 _cleanup_closedir_ DIR *d = NULL;
132 bool shown_pids = false;
138 n_columns = columns();
143 r = cg_mangle_path(path, &fn);
151 while ((r = cg_read_subgroup(d, &gn)) > 0) {
152 _cleanup_free_ char *k = NULL;
154 k = strjoin(fn, "/", gn, NULL);
159 if (!(flags & OUTPUT_SHOW_ALL) && cg_is_empty_recursive(NULL, k) > 0)
163 show_cgroup_one_by_path(path, prefix, n_columns, true, kernel_threads, flags);
168 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_BRANCH), cg_unescape(basename(last)));
171 p1 = strappend(prefix, draw_special_char(DRAW_TREE_VERTICAL));
176 show_cgroup_by_path(last, p1, n_columns-2, kernel_threads, flags);
188 show_cgroup_one_by_path(path, prefix, n_columns, !!last, kernel_threads, flags);
191 printf("%s%s%s\n", prefix, draw_special_char(DRAW_TREE_RIGHT), cg_unescape(basename(last)));
194 p2 = strappend(prefix, " ");
199 show_cgroup_by_path(last, p2, n_columns-2, kernel_threads, flags);
205 int show_cgroup(const char *controller, const char *path, const char *prefix, unsigned n_columns, bool kernel_threads, OutputFlags flags) {
206 _cleanup_free_ char *p = NULL;
211 r = cg_get_path(controller, path, NULL, &p);
215 return show_cgroup_by_path(p, prefix, n_columns, kernel_threads, flags);
218 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) {
219 _cleanup_free_ pid_t *copy = NULL;
229 n_columns = columns();
231 prefix = strempty(prefix);
233 copy = new(pid_t, n_pids);
237 for (i = 0, j = 0; i < n_pids; i++) {
238 _cleanup_free_ char *k = NULL;
240 r = cg_pid_get_path(controller, pids[i], &k);
244 if (path_startswith(k, path))
250 show_pid_array(copy, j, prefix, n_columns, true, false, false, flags);
255 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) {
260 r = show_cgroup(controller, path, prefix, n_columns, kernel_threads, flags);
264 return show_extra_pids(controller, path, prefix, n_columns, extra_pids, n_extra_pids, flags);
267 /// UNNEEDED by elogind
269 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) {
270 _cleanup_free_ char *controller = NULL, *path = NULL;
275 r = cg_split_spec(spec, &controller, &path);
279 return show_cgroup_and_extra(controller, path, prefix, n_columns, kernel_threads, extra_pids, n_extra_pids, flags);