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/>.
28 #include "cgroup-show.h"
29 #include "cgroup-util.h"
31 #include "path-util.h"
35 #include "output-mode.h"
39 #include "bus-error.h"
40 #include "unit-name.h"
42 static bool arg_no_pager = false;
43 static bool arg_kernel_threads = false;
44 static bool arg_all = false;
45 static int arg_full = -1;
46 static char* arg_machine = NULL;
48 static void help(void) {
49 printf("%s [OPTIONS...] [CGROUP...]\n\n"
50 "Recursively show control group contents.\n\n"
51 " -h --help Show this help\n"
52 " --version Show package version\n"
53 " --no-pager Do not pipe output into a pager\n"
54 " -a --all Show all groups, including empty\n"
55 " -l --full Do not ellipsize output\n"
56 " -k Include kernel threads in output\n"
57 " -M --machine Show container\n"
58 , program_invocation_short_name);
61 static int parse_argv(int argc, char *argv[]) {
68 static const struct option options[] = {
69 { "help", no_argument, NULL, 'h' },
70 { "version", no_argument, NULL, ARG_VERSION },
71 { "no-pager", no_argument, NULL, ARG_NO_PAGER },
72 { "all", no_argument, NULL, 'a' },
73 { "full", no_argument, NULL, 'l' },
74 { "machine", required_argument, NULL, 'M' },
83 while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0)
93 puts(SYSTEMD_FEATURES);
109 arg_kernel_threads = true;
113 arg_machine = optarg;
120 assert_not_reached("Unhandled option");
126 int main(int argc, char *argv[]) {
127 int r = 0, retval = EXIT_FAILURE;
129 _cleanup_free_ char *root = NULL;
130 _cleanup_bus_close_unref_ sd_bus *bus = NULL;
132 log_parse_environment();
135 r = parse_argv(argc, argv);
139 retval = EXIT_SUCCESS;
144 r = pager_open(false);
152 arg_all * OUTPUT_SHOW_ALL |
153 (arg_full > 0) * OUTPUT_FULL_WIDTH;
155 r = bus_open_transport(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
157 log_error_errno(r, "Failed to create bus connection: %m");
164 for (i = optind; i < argc; i++) {
167 fprintf(stdout, "%s:\n", argv[i]);
171 root = strjoin("machine/", arg_machine, "/", argv[i], NULL);
173 root = strdup(argv[i]);
177 q = show_cgroup_by_path(root, NULL, 0,
178 arg_kernel_threads, output_flags);
184 _cleanup_free_ char *p;
186 p = get_current_dir_name();
188 log_error_errno(errno, "Cannot determine current working directory: %m");
192 if (path_startswith(p, "/sys/fs/cgroup") && !arg_machine) {
193 printf("Working Directory %s:\n", p);
194 r = show_cgroup_by_path(p, NULL, 0,
195 arg_kernel_threads, output_flags);
200 _cleanup_free_ char *scope = NULL;
201 _cleanup_free_ char *path = NULL;
202 _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
203 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
205 m = strjoina("/run/systemd/machines/", arg_machine);
206 r = parse_env_file(m, NEWLINE, "SCOPE", &scope, NULL);
208 log_error_errno(r, "Failed to get machine path: %m");
212 path = unit_dbus_path_from_name(scope);
218 r = sd_bus_get_property(
220 "org.freedesktop.systemd1",
222 "org.freedesktop.systemd1.Scope",
229 log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r));
233 r = sd_bus_message_read(reply, "s", &cgroup);
235 bus_log_parse_error(r);
239 root = strdup(cgroup);
246 r = cg_get_root_path(&root);
248 log_error_errno(r, "Failed to get %s path: %m",
249 arg_machine ? "machine" : "root");
253 r = show_cgroup(SYSTEMD_CGROUP_CONTROLLER, root, NULL, 0,
254 arg_kernel_threads, output_flags);
259 log_error_errno(r, "Failed to list cgroup tree %s: %m", root);
260 retval = EXIT_FAILURE;
262 retval = EXIT_SUCCESS;