333 lines
10 KiB
C
333 lines
10 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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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 <getopt.h>
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#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <dbus.h>
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#include <unistd.h>
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#include "dbus-common.h"
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#include "util.h"
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#include "build.h"
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#include "strv.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 = "block";
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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(DBusConnection *bus, DBusError *error) {
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DBusMessage *reply = NULL;
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int r;
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r = bus_method_call_with_reply(
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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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&reply,
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NULL,
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DBUS_TYPE_STRING, &arg_what,
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DBUS_TYPE_STRING, &arg_who,
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DBUS_TYPE_STRING, &arg_why,
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DBUS_TYPE_STRING, &arg_mode,
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DBUS_TYPE_INVALID);
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if (r < 0)
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return r;
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if (!dbus_message_get_args(reply, error,
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DBUS_TYPE_UNIX_FD, &r,
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DBUS_TYPE_INVALID))
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r = -EIO;
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dbus_message_unref(reply);
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return r;
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}
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static int print_inhibitors(DBusConnection *bus, DBusError *error) {
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DBusMessage *reply = NULL;
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unsigned n = 0;
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DBusMessageIter iter, sub, sub2;
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int r;
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r = bus_method_call_with_reply(
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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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&reply,
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NULL,
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DBUS_TYPE_INVALID);
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if (r < 0)
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goto finish;
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if (!dbus_message_iter_init(reply, &iter)) {
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r = -ENOMEM;
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goto finish;
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}
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if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) {
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r = -EIO;
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goto finish;
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}
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printf("%-21s %-20s %-20s %-5s %6s %6s\n",
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"WHAT",
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"WHO",
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"WHY",
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"MODE",
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"UID",
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"PID");
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dbus_message_iter_recurse(&iter, &sub);
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while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
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const char *what, *who, *why, *mode;
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char *ewho, *ewhy;
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dbus_uint32_t uid, pid;
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if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
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r = -EIO;
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goto finish;
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}
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dbus_message_iter_recurse(&sub, &sub2);
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if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &what, true) < 0 ||
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bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &who, true) < 0 ||
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bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &why, true) < 0 ||
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bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &mode, true) < 0 ||
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bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &uid, true) < 0 ||
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bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, false) < 0) {
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r = -EIO;
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goto finish;
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}
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ewho = ellipsize(who, 20, 66);
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ewhy = ellipsize(why, 20, 66);
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printf("%-21s %-20s %-20s %-5s %6lu %6lu\n",
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what, ewho ? ewho : who, ewhy ? ewhy : why, mode, (unsigned long) uid, (unsigned long) pid);
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free(ewho);
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free(ewhy);
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dbus_message_iter_next(&sub);
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n++;
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}
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printf("\n%u inhibitors listed.\n", n);
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r = 0;
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finish:
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if (reply)
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dbus_message_unref(reply);
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return r;
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}
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static int 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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return 0;
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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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{ NULL, 0, NULL, 0 }
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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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puts(PACKAGE_STRING);
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puts(DISTRIBUTION);
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puts(SYSTEMD_FEATURES);
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return 0;
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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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default:
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log_error("Unknown option code %c", c);
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return -EINVAL;
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}
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}
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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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int r, exit_code = 0;
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DBusConnection *bus = NULL;
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DBusError error;
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int fd = -1;
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dbus_error_init(&error);
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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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goto finish;
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bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
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if (!bus) {
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log_error("Failed to connect to bus: %s", bus_error_message(&error));
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r = -EIO;
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goto finish;
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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_or_strerror(&error, -r));
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goto finish;
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}
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} else {
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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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fd = inhibit(bus, &error);
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free(w);
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if (fd < 0) {
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log_error("Failed to inhibit: %s", bus_error_message_or_strerror(&error, -r));
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r = fd;
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goto finish;
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}
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pid = fork();
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if (pid < 0) {
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log_error("Failed to fork: %m");
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r = -errno;
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goto finish;
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}
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if (pid == 0) {
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/* Child */
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close_nointr_nofail(fd);
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close_all_fds(NULL, 0);
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execvp(argv[optind], argv + optind);
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log_error("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);
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if (r >= 0)
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exit_code = r;
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}
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finish:
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if (bus) {
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dbus_connection_close(bus);
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dbus_connection_unref(bus);
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}
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dbus_error_free(&error);
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if (fd >= 0)
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close_nointr_nofail(fd);
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return r < 0 ? EXIT_FAILURE : exit_code;
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}
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