mirror of
https://github.com/systemd/systemd.git
synced 2024-11-06 08:26:52 +03:00
333 lines
10 KiB
C
333 lines
10 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
|
|
|
|
/***
|
|
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 <getopt.h>
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <dbus.h>
|
|
#include <unistd.h>
|
|
|
|
#include "dbus-common.h"
|
|
#include "util.h"
|
|
#include "build.h"
|
|
#include "strv.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 = "block";
|
|
|
|
static enum {
|
|
ACTION_INHIBIT,
|
|
ACTION_LIST
|
|
} arg_action = ACTION_INHIBIT;
|
|
|
|
static int inhibit(DBusConnection *bus, DBusError *error) {
|
|
DBusMessage *reply = NULL;
|
|
int r;
|
|
|
|
r = bus_method_call_with_reply(
|
|
bus,
|
|
"org.freedesktop.login1",
|
|
"/org/freedesktop/login1",
|
|
"org.freedesktop.login1.Manager",
|
|
"Inhibit",
|
|
&reply,
|
|
NULL,
|
|
DBUS_TYPE_STRING, &arg_what,
|
|
DBUS_TYPE_STRING, &arg_who,
|
|
DBUS_TYPE_STRING, &arg_why,
|
|
DBUS_TYPE_STRING, &arg_mode,
|
|
DBUS_TYPE_INVALID);
|
|
if (r < 0)
|
|
return r;
|
|
|
|
if (!dbus_message_get_args(reply, error,
|
|
DBUS_TYPE_UNIX_FD, &r,
|
|
DBUS_TYPE_INVALID))
|
|
r = -EIO;
|
|
|
|
dbus_message_unref(reply);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int print_inhibitors(DBusConnection *bus, DBusError *error) {
|
|
DBusMessage *reply = NULL;
|
|
unsigned n = 0;
|
|
DBusMessageIter iter, sub, sub2;
|
|
int r;
|
|
|
|
r = bus_method_call_with_reply(
|
|
bus,
|
|
"org.freedesktop.login1",
|
|
"/org/freedesktop/login1",
|
|
"org.freedesktop.login1.Manager",
|
|
"ListInhibitors",
|
|
&reply,
|
|
NULL,
|
|
DBUS_TYPE_INVALID);
|
|
if (r < 0)
|
|
goto finish;
|
|
|
|
if (!dbus_message_iter_init(reply, &iter)) {
|
|
r = -ENOMEM;
|
|
goto finish;
|
|
}
|
|
|
|
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_ARRAY) {
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
printf("%-21s %-20s %-20s %-5s %6s %6s\n",
|
|
"WHAT",
|
|
"WHO",
|
|
"WHY",
|
|
"MODE",
|
|
"UID",
|
|
"PID");
|
|
|
|
dbus_message_iter_recurse(&iter, &sub);
|
|
while (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_INVALID) {
|
|
const char *what, *who, *why, *mode;
|
|
char *ewho, *ewhy;
|
|
dbus_uint32_t uid, pid;
|
|
|
|
if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRUCT) {
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
dbus_message_iter_recurse(&sub, &sub2);
|
|
|
|
if (bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &what, true) < 0 ||
|
|
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &who, true) < 0 ||
|
|
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &why, true) < 0 ||
|
|
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_STRING, &mode, true) < 0 ||
|
|
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &uid, true) < 0 ||
|
|
bus_iter_get_basic_and_next(&sub2, DBUS_TYPE_UINT32, &pid, false) < 0) {
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
ewho = ellipsize(who, 20, 66);
|
|
ewhy = ellipsize(why, 20, 66);
|
|
|
|
printf("%-21s %-20s %-20s %-5s %6lu %6lu\n",
|
|
what, ewho ? ewho : who, ewhy ? ewhy : why, mode, (unsigned long) uid, (unsigned long) pid);
|
|
|
|
free(ewho);
|
|
free(ewhy);
|
|
|
|
dbus_message_iter_next(&sub);
|
|
|
|
n++;
|
|
}
|
|
|
|
printf("\n%u inhibitors listed.\n", n);
|
|
r = 0;
|
|
|
|
finish:
|
|
if (reply)
|
|
dbus_message_unref(reply);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int 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);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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 },
|
|
{ NULL, 0, NULL, 0 }
|
|
};
|
|
|
|
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:
|
|
puts(PACKAGE_STRING);
|
|
puts(DISTRIBUTION);
|
|
puts(SYSTEMD_FEATURES);
|
|
return 0;
|
|
|
|
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;
|
|
|
|
default:
|
|
log_error("Unknown option code %c", c);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (arg_action == ACTION_INHIBIT && optind >= argc) {
|
|
log_error("Missing command line to execute.");
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int r, exit_code = 0;
|
|
DBusConnection *bus = NULL;
|
|
DBusError error;
|
|
int fd = -1;
|
|
|
|
dbus_error_init(&error);
|
|
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
r = parse_argv(argc, argv);
|
|
if (r <= 0)
|
|
goto finish;
|
|
|
|
bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
|
|
if (!bus) {
|
|
log_error("Failed to connect to bus: %s", bus_error_message(&error));
|
|
r = -EIO;
|
|
goto finish;
|
|
}
|
|
|
|
if (arg_action == ACTION_LIST) {
|
|
|
|
r = print_inhibitors(bus, &error);
|
|
if (r < 0) {
|
|
log_error("Failed to list inhibitors: %s", bus_error_message_or_strerror(&error, -r));
|
|
goto finish;
|
|
}
|
|
|
|
} else {
|
|
char *w = NULL;
|
|
pid_t pid;
|
|
|
|
if (!arg_who)
|
|
arg_who = w = strv_join(argv + optind, " ");
|
|
|
|
fd = inhibit(bus, &error);
|
|
free(w);
|
|
|
|
if (fd < 0) {
|
|
log_error("Failed to inhibit: %s", bus_error_message_or_strerror(&error, -r));
|
|
r = fd;
|
|
goto finish;
|
|
}
|
|
|
|
pid = fork();
|
|
if (pid < 0) {
|
|
log_error("Failed to fork: %m");
|
|
r = -errno;
|
|
goto finish;
|
|
}
|
|
|
|
if (pid == 0) {
|
|
/* Child */
|
|
|
|
close_nointr_nofail(fd);
|
|
close_all_fds(NULL, 0);
|
|
|
|
execvp(argv[optind], argv + optind);
|
|
log_error("Failed to execute %s: %m", argv[optind]);
|
|
_exit(EXIT_FAILURE);
|
|
}
|
|
|
|
r = wait_for_terminate_and_warn(argv[optind], pid);
|
|
if (r >= 0)
|
|
exit_code = r;
|
|
}
|
|
|
|
finish:
|
|
if (bus) {
|
|
dbus_connection_close(bus);
|
|
dbus_connection_unref(bus);
|
|
}
|
|
|
|
dbus_error_free(&error);
|
|
|
|
if (fd >= 0)
|
|
close_nointr_nofail(fd);
|
|
|
|
return r < 0 ? EXIT_FAILURE : exit_code;
|
|
}
|