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"
36 #include "output-mode.h"
38 static bool arg_no_pager = false;
39 static bool arg_kernel_threads = false;
40 static bool arg_all = false;
41 static int arg_full = -1;
42 static char* arg_machine = NULL;
44 static void help(void) {
46 printf("%s [OPTIONS...] [CGROUP...]\n\n"
47 "Recursively show control group contents.\n\n"
48 " -h --help Show this help\n"
49 " --version Show package version\n"
50 " --no-pager Do not pipe output into a pager\n"
51 " -a --all Show all groups, including empty\n"
52 " -l --full Do not ellipsize output\n"
53 " -k Include kernel threads in output\n"
54 " -M --machine Show container\n",
55 program_invocation_short_name);
58 static int parse_argv(int argc, char *argv[]) {
65 static const struct option options[] = {
66 { "help", no_argument, NULL, 'h' },
67 { "version", no_argument, NULL, ARG_VERSION },
68 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
69 { "all", no_argument, NULL, 'a' },
70 { "full", no_argument, NULL, 'l' },
71 { "machine", required_argument, NULL, 'M' },
80 while ((c = getopt_long(argc, argv, "hkaM:", options, NULL)) >= 0) {
90 puts(SYSTEMD_FEATURES);
106 arg_kernel_threads = true;
110 arg_machine = optarg;
117 log_error("Unknown option code %c", c);
125 int main(int argc, char *argv[]) {
126 int r = 0, retval = EXIT_FAILURE;
128 char _cleanup_free_ *root = NULL;
130 log_parse_environment();
133 r = parse_argv(argc, argv);
137 retval = EXIT_SUCCESS;
142 r = pager_open(false);
150 arg_all * OUTPUT_SHOW_ALL |
151 (arg_full > 0) * OUTPUT_FULL_WIDTH;
156 for (i = optind; i < argc; i++) {
158 printf("%s:\n", argv[i]);
161 root = strjoin("machine/", arg_machine, "/", argv[i], NULL);
163 root = strdup(argv[i]);
167 q = show_cgroup_by_path(root, NULL, 0,
168 arg_kernel_threads, output_flags);
174 _cleanup_free_ char *p;
176 p = get_current_dir_name();
178 log_error("Cannot determine current working directory: %m");
182 if (path_startswith(p, "/sys/fs/cgroup") && !arg_machine) {
183 printf("Working Directory %s:\n", p);
184 r = show_cgroup_by_path(p, NULL, 0,
185 arg_kernel_threads, output_flags);
188 r = cg_get_machine_path(arg_machine, &root);
190 r = cg_get_root_path(&root);
192 log_error("Failed to get %s path: %s",
193 arg_machine ? "machine" : "root", strerror(-r));
197 r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0,
198 arg_kernel_threads, output_flags);
203 log_error("Failed to list cgroup tree %s: %s", root, strerror(-r));
204 retval = EXIT_FAILURE;
206 retval = EXIT_SUCCESS;