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-rw-r--r--src/login/inhibit.c353
1 files changed, 353 insertions, 0 deletions
diff --git a/src/login/inhibit.c b/src/login/inhibit.c
new file mode 100644
index 0000000000..a817c84b36
--- /dev/null
+++ b/src/login/inhibit.c
@@ -0,0 +1,353 @@
+/*-*- 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:suspend: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 *m = NULL, *reply = NULL;
+ int fd;
+
+ assert(bus);
+
+ m = dbus_message_new_method_call(
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "Inhibit");
+ if (!m)
+ return -ENOMEM;
+
+ if (!dbus_message_append_args(m,
+ DBUS_TYPE_STRING, &arg_what,
+ DBUS_TYPE_STRING, &arg_who,
+ DBUS_TYPE_STRING, &arg_why,
+ DBUS_TYPE_STRING, &arg_mode,
+ DBUS_TYPE_INVALID)) {
+ fd = -ENOMEM;
+ goto finish;
+ }
+
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error);
+ if (!reply) {
+ fd = -EIO;
+ goto finish;
+ }
+
+ if (!dbus_message_get_args(reply, error,
+ DBUS_TYPE_UNIX_FD, &fd,
+ DBUS_TYPE_INVALID)){
+ fd = -EIO;
+ goto finish;
+ }
+
+finish:
+ if (m)
+ dbus_message_unref(m);
+
+ if (reply)
+ dbus_message_unref(reply);
+
+ return fd;
+}
+
+static int print_inhibitors(DBusConnection *bus, DBusError *error) {
+ DBusMessage *m, *reply;
+ unsigned n = 0;
+ DBusMessageIter iter, sub, sub2;
+ int r;
+
+ assert(bus);
+
+ m = dbus_message_new_method_call(
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "ListInhibitors");
+ if (!m)
+ return -ENOMEM;
+
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, error);
+ if (!reply) {
+ r = -EIO;
+ 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;
+ }
+ dbus_message_iter_recurse(&iter, &sub);
+
+ printf("%-21s %-20s %-20s %-5s %6s %6s\n",
+ "WHAT",
+ "WHO",
+ "WHY",
+ "MODE",
+ "UID",
+ "PID");
+
+
+ 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 (m)
+ dbus_message_unref(m);
+
+ if (reply)
+ dbus_message_unref(reply);
+
+ return r;
+}
+
+static int help(void) {
+
+ printf("%s [OPTIONS...] {COMMAND} ...\n\n"
+ "Execute a process while inhibiting shutdown/suspend/idle.\n\n"
+ " -h --help Show this help\n"
+ " --version Show package version\n"
+ " --what=WHAT Operations to inhibit, colon separated list of idle,\n"
+ " suspend, shutdown\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);
+ 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;
+}
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