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