2 This file is part of systemd.
4 Copyright 2012 Lennart Poettering
6 systemd is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published by
8 the Free Software Foundation; either version 2.1 of the License, or
9 (at your option) any later version.
11 systemd is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with systemd; If not, see <http://www.gnu.org/licenses/>.
28 #include "alloc-util.h"
29 #include "bus-error.h"
32 #include "format-util.h"
33 #include "process-util.h"
34 #include "signal-util.h"
36 #include "user-util.h"
39 /// Additional includes needed by elogind
40 #include "musl_missing.h"
42 static const char* arg_what = "idle:sleep:shutdown";
43 static const char* arg_who = NULL;
44 static const char* arg_why = "Unknown reason";
45 static const char* arg_mode = NULL;
50 } arg_action = ACTION_INHIBIT;
52 static int inhibit(sd_bus *bus, sd_bus_error *error) {
53 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
57 r = sd_bus_call_method(
59 "org.freedesktop.login1",
60 "/org/freedesktop/login1",
61 "org.freedesktop.login1.Manager",
65 "ssss", arg_what, arg_who, arg_why, arg_mode);
69 r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd);
73 r = fcntl(fd, F_DUPFD_CLOEXEC, 3);
80 static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {
81 _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
82 const char *what, *who, *why, *mode;
83 unsigned int uid, pid;
87 r = sd_bus_call_method(
89 "org.freedesktop.login1",
90 "/org/freedesktop/login1",
91 "org.freedesktop.login1.Manager",
99 r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
101 return bus_log_parse_error(r);
103 while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
104 _cleanup_free_ char *comm = NULL, *u = NULL;
106 if (arg_mode && !streq(mode, arg_mode))
109 get_process_comm(pid, &comm);
110 u = uid_to_name(uid);
112 printf(" Who: %s (UID "UID_FMT"/%s, PID "PID_FMT"/%s)\n"
116 who, uid, strna(u), pid, strna(comm),
124 return bus_log_parse_error(r);
126 r = sd_bus_message_exit_container(reply);
128 return bus_log_parse_error(r);
130 printf("%u inhibitors listed.\n", n);
134 static void help(void) {
135 printf("%s [OPTIONS...] {COMMAND} ...\n\n"
136 "Execute a process while inhibiting shutdown/sleep/idle.\n\n"
137 " -h --help Show this help\n"
138 " --version Show package version\n"
139 " --what=WHAT Operations to inhibit, colon separated list of:\n"
140 " shutdown, sleep, idle, handle-power-key,\n"
141 " handle-suspend-key, handle-hibernate-key,\n"
142 " handle-lid-switch\n"
143 " --who=STRING A descriptive string who is inhibiting\n"
144 " --why=STRING A descriptive string why is being inhibited\n"
145 " --mode=MODE One of block or delay\n"
146 " --list List active inhibitors\n"
147 , program_invocation_short_name);
150 static int parse_argv(int argc, char *argv[]) {
161 static const struct option options[] = {
162 { "help", no_argument, NULL, 'h' },
163 { "version", no_argument, NULL, ARG_VERSION },
164 { "what", required_argument, NULL, ARG_WHAT },
165 { "who", required_argument, NULL, ARG_WHO },
166 { "why", required_argument, NULL, ARG_WHY },
167 { "mode", required_argument, NULL, ARG_MODE },
168 { "list", no_argument, NULL, ARG_LIST },
177 while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0)
205 arg_action = ACTION_LIST;
212 assert_not_reached("Unhandled option");
215 if (arg_action == ACTION_INHIBIT && optind == argc)
216 arg_action = ACTION_LIST;
218 else if (arg_action == ACTION_INHIBIT && optind >= argc) {
219 log_error("Missing command line to execute.");
226 int main(int argc, char *argv[]) {
227 _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
228 _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
231 elogind_set_program_name(argv[0]);
232 log_parse_environment();
235 r = parse_argv(argc, argv);
241 r = sd_bus_default_system(&bus);
243 log_error_errno(r, "Failed to connect to bus: %m");
247 if (arg_action == ACTION_LIST) {
249 r = print_inhibitors(bus, &error);
251 log_error("Failed to list inhibitors: %s", bus_error_message(&error, -r));
256 _cleanup_close_ int fd = -1;
257 _cleanup_free_ char *w = NULL;
261 arg_who = w = strv_join(argv + optind, " ");
266 fd = inhibit(bus, &error);
268 log_error("Failed to inhibit: %s", bus_error_message(&error, fd));
274 log_error_errno(errno, "Failed to fork: %m");
281 (void) reset_all_signal_handlers();
282 (void) reset_signal_mask();
284 close_all_fds(NULL, 0);
286 execvp(argv[optind], argv + optind);
287 log_error_errno(errno, "Failed to execute %s: %m", argv[optind]);
291 r = wait_for_terminate_and_warn(argv[optind], pid, true);
292 return r < 0 ? EXIT_FAILURE : r;