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"
40 #include "bus-error.h"
41 #include "unit-name.h"
43 static bool arg_no_pager = false;
44 static bool arg_kernel_threads = false;
45 static bool arg_all = false;
46 static int arg_full = -1;
47 static char* arg_machine = NULL;
49 static int help(void) {
51 printf("%s [OPTIONS...] [CGROUP...]\n\n"
52 "Recursively show control group contents.\n\n"
53 " -h --help Show this help\n"
54 " --version Show package version\n"
55 " --no-pager Do not pipe output into a pager\n"
56 " -a --all Show all groups, including empty\n"
57 " -l --full Do not ellipsize output\n"
58 " -k Include kernel threads in output\n"
59 " -M --machine Show container\n",
60 program_invocation_short_name);
65 static int parse_argv(int argc, char *argv[]) {
72 static const struct option options[] = {
73 { "help", no_argument, NULL, 'h' },
74 { "version", no_argument, NULL, ARG_VERSION },
75 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
76 { "all", no_argument, NULL, 'a' },
77 { "full", no_argument, NULL, 'l' },
78 { "machine", required_argument, NULL, 'M' },
87 while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0) {
96 puts(SYSTEMD_FEATURES);
112 arg_kernel_threads = true;
116 arg_machine = optarg;
123 assert_not_reached("Unhandled option");
130 int main(int argc, char *argv[]) {
131 int r = 0, retval = EXIT_FAILURE;
133 char _cleanup_free_ *root = NULL;
134 _cleanup_bus_unref_ sd_bus *bus = NULL;
136 log_parse_environment();
139 r = parse_argv(argc, argv);
143 retval = EXIT_SUCCESS;
148 r = pager_open(false);
156 arg_all * OUTPUT_SHOW_ALL |
157 (arg_full > 0) * OUTPUT_FULL_WIDTH;
159 r = bus_open_transport(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
161 log_error("Failed to create bus connection: %s", strerror(-r));
168 for (i = optind; i < argc; i++) {
171 fprintf(stdout, "%s:\n", argv[i]);
175 root = strjoin("machine/", arg_machine, "/", argv[i], NULL);
177 root = strdup(argv[i]);
181 q = show_cgroup_by_path(root, NULL, 0,
182 arg_kernel_threads, output_flags);
188 _cleanup_free_ char *p;
190 p = get_current_dir_name();
192 log_error("Cannot determine current working directory: %m");
196 if (path_startswith(p, "/sys/fs/cgroup") && !arg_machine) {
197 printf("Working Directory %s:\n", p);
198 r = show_cgroup_by_path(p, NULL, 0,
199 arg_kernel_threads, output_flags);
204 _cleanup_free_ char *scope = NULL;
205 _cleanup_free_ char *path = NULL;
206 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
207 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
209 m = strappenda("/run/systemd/machines/", arg_machine);
210 r = parse_env_file(m, NEWLINE, "SCOPE", &scope, NULL);
212 log_error("Failed to get machine path: %s", strerror(-r));
216 path = unit_dbus_path_from_name(scope);
222 r = sd_bus_get_property(
224 "org.freedesktop.systemd1",
226 "org.freedesktop.systemd1.Scope",
233 log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r));
237 r = sd_bus_message_read(reply, "s", &cgroup);
239 bus_log_parse_error(r);
243 root = strdup(cgroup);
250 r = cg_get_root_path(&root);
252 log_error("Failed to get %s path: %s",
253 arg_machine ? "machine" : "root", strerror(-r));
257 r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0,
258 arg_kernel_threads, output_flags);
263 log_error("Failed to list cgroup tree %s: %s", root, strerror(-r));
264 retval = EXIT_FAILURE;
266 retval = EXIT_SUCCESS;