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 "cgroup-show.h"
30 #include "cgroup-util.h"
32 #include "path-util.h"
37 static bool arg_no_pager = false;
38 static bool arg_kernel_threads = false;
39 static bool arg_all = false;
41 static void help(void) {
43 printf("%s [OPTIONS...] [CGROUP...]\n\n"
44 "Recursively show control group contents.\n\n"
45 " -h --help Show this help\n"
46 " --version Show package version\n"
47 " --no-pager Do not pipe output into a pager\n"
48 " -a --all Show all groups, including empty\n"
49 " -k Include kernel threads in output\n",
50 program_invocation_short_name);
53 static int parse_argv(int argc, char *argv[]) {
60 static const struct option options[] = {
61 { "help", no_argument, NULL, 'h' },
62 { "version", no_argument, NULL, ARG_VERSION },
63 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
64 { "all", no_argument, NULL, 'a' },
73 while ((c = getopt_long(argc, argv, "hka", options, NULL)) >= 0) {
84 puts(SYSTEMD_FEATURES);
96 arg_kernel_threads = true;
103 log_error("Unknown option code %c", c);
111 int main(int argc, char *argv[]) {
112 int r = 0, retval = EXIT_FAILURE;
114 log_parse_environment();
117 r = parse_argv(argc, argv);
121 retval = EXIT_SUCCESS;
131 for (i = (unsigned) optind; i < (unsigned) argc; i++) {
133 printf("%s:\n", argv[i]);
135 q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads, arg_all);
141 char _cleanup_free_ *p;
143 p = get_current_dir_name();
145 log_error("Cannot determine current working directory: %m");
149 if (path_startswith(p, "/sys/fs/cgroup")) {
150 printf("Working Directory %s:\n", p);
151 r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads, arg_all);
153 char _cleanup_free_ *root = NULL;
154 const char *t = NULL;
156 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &root);
160 if (endswith(root, "/system"))
161 root[strlen(root)-7] = 0;
163 t = root[0] ? root : "/";
166 r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads, arg_all);
171 log_error("Failed to list cgroup tree: %s", strerror(-r));
173 retval = EXIT_SUCCESS;