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"
36 static bool arg_no_pager = false;
37 static bool arg_kernel_threads = false;
38 static bool arg_all = false;
40 static void help(void) {
42 printf("%s [OPTIONS...] [CGROUP...]\n\n"
43 "Recursively show control group contents.\n\n"
44 " -h --help Show this help\n"
45 " --version Show package version\n"
46 " --no-pager Do not pipe output into a pager\n"
47 " -a --all Show all groups, including empty\n"
48 " -k Include kernel threads in output\n",
49 program_invocation_short_name);
52 static int parse_argv(int argc, char *argv[]) {
59 static const struct option options[] = {
60 { "help", no_argument, NULL, 'h' },
61 { "version", no_argument, NULL, ARG_VERSION },
62 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
63 { "all", no_argument, NULL, 'a' },
72 while ((c = getopt_long(argc, argv, "hka", options, NULL)) >= 0) {
83 puts(SYSTEMD_FEATURES);
95 arg_kernel_threads = true;
102 log_error("Unknown option code %c", c);
110 int main(int argc, char *argv[]) {
111 int r = 0, retval = EXIT_FAILURE;
113 log_parse_environment();
116 r = parse_argv(argc, argv);
120 retval = EXIT_SUCCESS;
130 for (i = (unsigned) optind; i < (unsigned) argc; i++) {
132 printf("%s:\n", argv[i]);
134 q = show_cgroup_by_path(argv[i], NULL, 0, arg_kernel_threads, arg_all);
142 p = get_current_dir_name();
144 log_error("Cannot determine current working directory: %m");
148 if (path_startswith(p, "/sys/fs/cgroup")) {
149 printf("Working Directory %s:\n", p);
150 r = show_cgroup_by_path(p, NULL, 0, arg_kernel_threads, arg_all);
153 const char *t = NULL;
155 r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, 1, &root);
159 if (endswith(root, "/system"))
160 root[strlen(root)-7] = 0;
162 t = root[0] ? root : "/";
165 r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, t, NULL, 0, arg_kernel_threads, arg_all);
173 log_error("Failed to list cgroup tree: %s", strerror(-r));
175 retval = EXIT_SUCCESS;