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Diffstat (limited to 'src/grp-login/systemd-inhibit/inhibit.c')
-rw-r--r--src/grp-login/systemd-inhibit/inhibit.c292
1 files changed, 292 insertions, 0 deletions
diff --git a/src/grp-login/systemd-inhibit/inhibit.c b/src/grp-login/systemd-inhibit/inhibit.c
new file mode 100644
index 0000000000..e87ea1c675
--- /dev/null
+++ b/src/grp-login/systemd-inhibit/inhibit.c
@@ -0,0 +1,292 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <systemd/sd-bus.h>
+
+#include "sd-bus/bus-error.h"
+#include "systemd-basic/alloc-util.h"
+#include "systemd-basic/fd-util.h"
+#include "systemd-basic/formats-util.h"
+#include "systemd-basic/process-util.h"
+#include "systemd-basic/signal-util.h"
+#include "systemd-basic/strv.h"
+#include "systemd-basic/user-util.h"
+#include "systemd-basic/util.h"
+#include "systemd-shared/bus-util.h"
+
+static const char* arg_what = "idle:sleep:shutdown";
+static const char* arg_who = NULL;
+static const char* arg_why = "Unknown reason";
+static const char* arg_mode = NULL;
+
+static enum {
+ ACTION_INHIBIT,
+ ACTION_LIST
+} arg_action = ACTION_INHIBIT;
+
+static int inhibit(sd_bus *bus, sd_bus_error *error) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ int r;
+ int fd;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "Inhibit",
+ error,
+ &reply,
+ "ssss", arg_what, arg_who, arg_why, arg_mode);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_read_basic(reply, SD_BUS_TYPE_UNIX_FD, &fd);
+ if (r < 0)
+ return r;
+
+ r = fcntl(fd, F_DUPFD_CLOEXEC, 3);
+ if (r < 0)
+ return -errno;
+
+ return r;
+}
+
+static int print_inhibitors(sd_bus *bus, sd_bus_error *error) {
+ _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
+ const char *what, *who, *why, *mode;
+ unsigned int uid, pid;
+ unsigned n = 0;
+ int r;
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "ListInhibitors",
+ error,
+ &reply,
+ "");
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssssuu)");
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ while ((r = sd_bus_message_read(reply, "(ssssuu)", &what, &who, &why, &mode, &uid, &pid)) > 0) {
+ _cleanup_free_ char *comm = NULL, *u = NULL;
+
+ if (arg_mode && !streq(mode, arg_mode))
+ continue;
+
+ get_process_comm(pid, &comm);
+ u = uid_to_name(uid);
+
+ printf(" Who: %s (UID "UID_FMT"/%s, PID "PID_FMT"/%s)\n"
+ " What: %s\n"
+ " Why: %s\n"
+ " Mode: %s\n\n",
+ who, uid, strna(u), pid, strna(comm),
+ what,
+ why,
+ mode);
+
+ n++;
+ }
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ r = sd_bus_message_exit_container(reply);
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ printf("%u inhibitors listed.\n", n);
+ return 0;
+}
+
+static void help(void) {
+ printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+ "Execute a process while inhibiting shutdown/sleep/idle.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --what=WHAT Operations to inhibit, colon separated list of:\n"
+ " shutdown, sleep, idle, handle-power-key,\n"
+ " handle-suspend-key, handle-hibernate-key,\n"
+ " handle-lid-switch\n"
+ " --who=STRING A descriptive string who is inhibiting\n"
+ " --why=STRING A descriptive string why is being inhibited\n"
+ " --mode=MODE One of block or delay\n"
+ " --list List active inhibitors\n"
+ , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[]) {
+
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_WHAT,
+ ARG_WHO,
+ ARG_WHY,
+ ARG_MODE,
+ ARG_LIST,
+ };
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version", no_argument, NULL, ARG_VERSION },
+ { "what", required_argument, NULL, ARG_WHAT },
+ { "who", required_argument, NULL, ARG_WHO },
+ { "why", required_argument, NULL, ARG_WHY },
+ { "mode", required_argument, NULL, ARG_MODE },
+ { "list", no_argument, NULL, ARG_LIST },
+ {}
+ };
+
+ int c;
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "+h", options, NULL)) >= 0)
+
+ switch (c) {
+
+ case 'h':
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ return version();
+
+ case ARG_WHAT:
+ arg_what = optarg;
+ break;
+
+ case ARG_WHO:
+ arg_who = optarg;
+ break;
+
+ case ARG_WHY:
+ arg_why = optarg;
+ break;
+
+ case ARG_MODE:
+ arg_mode = optarg;
+ break;
+
+ case ARG_LIST:
+ arg_action = ACTION_LIST;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (arg_action == ACTION_INHIBIT && optind == argc)
+ arg_action = ACTION_LIST;
+
+ else if (arg_action == ACTION_INHIBIT && optind >= argc) {
+ log_error("Missing command line to execute.");
+ return -EINVAL;
+ }
+
+ return 1;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+ _cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
+ int r;
+
+ log_parse_environment();
+ log_open();
+
+ r = parse_argv(argc, argv);
+ if (r < 0)
+ return EXIT_FAILURE;
+ if (r == 0)
+ return EXIT_SUCCESS;
+
+ r = sd_bus_default_system(&bus);
+ if (r < 0) {
+ log_error_errno(r, "Failed to connect to bus: %m");
+ return EXIT_FAILURE;
+ }
+
+ if (arg_action == ACTION_LIST) {
+
+ r = print_inhibitors(bus, &error);
+ if (r < 0) {
+ log_error("Failed to list inhibitors: %s", bus_error_message(&error, -r));
+ return EXIT_FAILURE;
+ }
+
+ } else {
+ _cleanup_close_ int fd = -1;
+ _cleanup_free_ char *w = NULL;
+ pid_t pid;
+
+ if (!arg_who)
+ arg_who = w = strv_join(argv + optind, " ");
+
+ if (!arg_mode)
+ arg_mode = "block";
+
+ fd = inhibit(bus, &error);
+ if (fd < 0) {
+ log_error("Failed to inhibit: %s", bus_error_message(&error, fd));
+ return EXIT_FAILURE;
+ }
+
+ pid = fork();
+ if (pid < 0) {
+ log_error_errno(errno, "Failed to fork: %m");
+ return EXIT_FAILURE;
+ }
+
+ if (pid == 0) {
+ /* Child */
+
+ (void) reset_all_signal_handlers();
+ (void) reset_signal_mask();
+
+ close_all_fds(NULL, 0);
+
+ execvp(argv[optind], argv + optind);
+ log_error_errno(errno, "Failed to execute %s: %m", argv[optind]);
+ _exit(EXIT_FAILURE);
+ }
+
+ r = wait_for_terminate_and_warn(argv[optind], pid, true);
+ return r < 0 ? EXIT_FAILURE : r;
+ }
+
+ return 0;
+}
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