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-rw-r--r--src/login/logind-dbus.c40
-rw-r--r--src/login/logind-utmp.c182
-rw-r--r--src/login/logind.c3
-rw-r--r--src/login/logind.h9
4 files changed, 234 insertions, 0 deletions
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 0fcf2cc960..80514f3d2c 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -43,6 +43,7 @@
#include "formats-util.h"
#include "process-util.h"
#include "terminal-util.h"
+#include "utmp-wtmp.h"
int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret) {
_cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
@@ -1800,6 +1801,7 @@ static int manager_scheduled_shutdown_handler(
static int method_schedule_shutdown(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) {
Manager *m = userdata;
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
const char *action_multiple_sessions = NULL;
const char *action_ignore_inhibit = NULL;
const char *action = NULL;
@@ -1857,6 +1859,24 @@ static int method_schedule_shutdown(sd_bus *bus, sd_bus_message *message, void *
m->scheduled_shutdown_timeout = elapse;
+ r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
+ if (r >= 0) {
+ const char *tty;
+
+ (void) sd_bus_creds_get_uid(creds, &m->scheduled_shutdown_uid);
+ (void) sd_bus_creds_get_tty(creds, &tty);
+
+ r = free_and_strdup(&m->scheduled_shutdown_tty, tty);
+ if (r < 0) {
+ m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
+ return log_oom();
+ }
+ }
+
+ r = manager_setup_wall_message_timer(m);
+ if (r < 0)
+ return r;
+
return sd_bus_reply_method_return(message, NULL);
}
@@ -1870,10 +1890,27 @@ static int method_cancel_scheduled_shutdown(sd_bus *bus, sd_bus_message *message
cancelled = m->scheduled_shutdown_type != NULL;
m->scheduled_shutdown_timeout_source = sd_event_source_unref(m->scheduled_shutdown_timeout_source);
+ m->wall_message_timeout_source = sd_event_source_unref(m->wall_message_timeout_source);
free(m->scheduled_shutdown_type);
m->scheduled_shutdown_type = NULL;
m->scheduled_shutdown_timeout = 0;
+ if (cancelled) {
+ _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL;
+ const char *tty = NULL;
+ uid_t uid = 0;
+ int r;
+
+ r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_AUGMENT|SD_BUS_CREDS_TTY|SD_BUS_CREDS_UID, &creds);
+ if (r >= 0) {
+ (void) sd_bus_creds_get_uid(creds, &uid);
+ (void) sd_bus_creds_get_tty(creds, &tty);
+ }
+
+ utmp_wall("The system shutdown has been cancelled",
+ lookup_uid(uid), tty, logind_wall_tty_filter, m);
+ }
+
return sd_bus_reply_method_return(message, "b", cancelled);
}
@@ -2275,6 +2312,9 @@ fail:
const sd_bus_vtable manager_vtable[] = {
SD_BUS_VTABLE_START(0),
+ SD_BUS_WRITABLE_PROPERTY("EnableWallMessages", "b", NULL, NULL, offsetof(Manager, enable_wall_messages), 0),
+ SD_BUS_WRITABLE_PROPERTY("WallMessage", "s", NULL, NULL, offsetof(Manager, wall_message), 0),
+
SD_BUS_PROPERTY("NAutoVTs", "u", NULL, offsetof(Manager, n_autovts), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("KillOnlyUsers", "as", NULL, offsetof(Manager, kill_only_users), SD_BUS_VTABLE_PROPERTY_CONST),
SD_BUS_PROPERTY("KillExcludeUsers", "as", NULL, offsetof(Manager, kill_exclude_users), SD_BUS_VTABLE_PROPERTY_CONST),
diff --git a/src/login/logind-utmp.c b/src/login/logind-utmp.c
new file mode 100644
index 0000000000..9bbffe34c7
--- /dev/null
+++ b/src/login/logind-utmp.c
@@ -0,0 +1,182 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2015 Daniel Mack
+
+ 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 <errno.h>
+#include <string.h>
+#include <unistd.h>
+#include <pwd.h>
+
+#include "sd-messages.h"
+#include "strv.h"
+#include "special.h"
+#include "unit-name.h"
+#include "audit.h"
+#include "bus-util.h"
+#include "bus-error.h"
+#include "bus-common-errors.h"
+#include "logind.h"
+#include "formats-util.h"
+#include "utmp-wtmp.h"
+
+_const_ static usec_t when_wall(usec_t n, usec_t elapse) {
+
+ usec_t left;
+ unsigned int i;
+ static const int wall_timers[] = {
+ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
+ 25, 40, 55, 70, 100, 130, 150, 180,
+ };
+
+ /* If the time is already passed, then don't announce */
+ if (n >= elapse)
+ return 0;
+
+ left = elapse - n;
+
+ for (i = 1; i < ELEMENTSOF(wall_timers); i++)
+ if (wall_timers[i] * USEC_PER_MINUTE >= left)
+ return left - wall_timers[i-1] * USEC_PER_MINUTE;
+
+ return left % USEC_PER_HOUR;
+}
+
+bool logind_wall_tty_filter(const char *tty, void *userdata) {
+
+ Manager *m = userdata;
+
+ assert(m);
+
+ if (!startswith(tty, "/dev/"))
+ return true;
+
+ return !streq(tty + 5, m->scheduled_shutdown_tty);
+}
+
+static int warn_wall(Manager *m, usec_t n) {
+ char date[FORMAT_TIMESTAMP_MAX] = {};
+ _cleanup_free_ char *l = NULL;
+ usec_t left;
+ int r;
+
+ assert(m);
+
+ if (!m->enable_wall_messages)
+ return 0;
+
+ left = m->scheduled_shutdown_timeout > n;
+
+ r = asprintf(&l, "%s%sThe system is going down for %s %s%s!",
+ strempty(m->wall_message),
+ isempty(m->wall_message) ? "" : "\n",
+ m->scheduled_shutdown_type,
+ left ? "at " : "NOW",
+ left ? format_timestamp(date, sizeof(date), m->scheduled_shutdown_timeout) : "");
+ if (r < 0) {
+ log_oom();
+ return 0;
+ }
+
+ utmp_wall(l, lookup_uid(m->scheduled_shutdown_uid),
+ m->scheduled_shutdown_tty, logind_wall_tty_filter, m);
+
+ return 1;
+}
+
+static int wall_message_timeout_handler(
+ sd_event_source *s,
+ uint64_t usec,
+ void *userdata) {
+
+ Manager *m = userdata;
+ usec_t n, next;
+ int r;
+
+ assert(m);
+ assert(s == m->wall_message_timeout_source);
+
+ n = now(CLOCK_REALTIME);
+
+ r = warn_wall(m, n);
+ if (r == 0)
+ return 0;
+
+ next = when_wall(n, m->scheduled_shutdown_timeout);
+ if (next > 0) {
+ r = sd_event_source_set_time(s, n + next);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_source_set_time() failed. %m\n");
+
+ r = sd_event_source_set_enabled(s, SD_EVENT_ONESHOT);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_source_set_enabled() failed. %m\n");
+ }
+
+ return 0;
+}
+
+int manager_setup_wall_message_timer(Manager *m) {
+
+ usec_t n, elapse;
+ int r;
+
+ assert(m);
+
+ n = now(CLOCK_REALTIME);
+ elapse = m->scheduled_shutdown_timeout;
+
+ /* wall message handling */
+
+ if (isempty(m->scheduled_shutdown_type)) {
+ warn_wall(m, n);
+ return 0;
+ }
+
+ if (elapse < n)
+ return 0;
+
+ /* Warn immediately if less than 15 minutes are left */
+ if (elapse - n < 15 * USEC_PER_MINUTE) {
+ r = warn_wall(m, n);
+ if (r == 0)
+ return 0;
+ }
+
+ elapse = when_wall(n, elapse);
+ if (elapse == 0)
+ return 0;
+
+ if (m->wall_message_timeout_source) {
+ r = sd_event_source_set_time(m->wall_message_timeout_source, n + elapse);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_source_set_time() failed. %m\n");
+
+ r = sd_event_source_set_enabled(m->wall_message_timeout_source, SD_EVENT_ONESHOT);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_source_set_enabled() failed. %m\n");
+ } else {
+ r = sd_event_add_time(m->event, &m->wall_message_timeout_source,
+ CLOCK_REALTIME, n + elapse, 0, wall_message_timeout_handler, m);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_add_time() failed. %m\n");
+ }
+
+ return 0;
+}
diff --git a/src/login/logind.c b/src/login/logind.c
index 3a4afdd266..0d96bbdaa9 100644
--- a/src/login/logind.c
+++ b/src/login/logind.c
@@ -145,6 +145,7 @@ static void manager_free(Manager *m) {
sd_event_source_unref(m->idle_action_event_source);
sd_event_source_unref(m->inhibit_timeout_source);
sd_event_source_unref(m->scheduled_shutdown_timeout_source);
+ sd_event_source_unref(m->wall_message_timeout_source);
sd_event_source_unref(m->console_active_event_source);
sd_event_source_unref(m->udev_seat_event_source);
@@ -178,6 +179,8 @@ static void manager_free(Manager *m) {
strv_free(m->kill_exclude_users);
free(m->scheduled_shutdown_type);
+ free(m->scheduled_shutdown_tty);
+ free(m->wall_message);
free(m->action_job);
free(m);
}
diff --git a/src/login/logind.h b/src/login/logind.h
index cd2bdc05d2..1c60b01860 100644
--- a/src/login/logind.h
+++ b/src/login/logind.h
@@ -100,6 +100,12 @@ struct Manager {
char *scheduled_shutdown_type;
usec_t scheduled_shutdown_timeout;
sd_event_source *scheduled_shutdown_timeout_source;
+ uid_t scheduled_shutdown_uid;
+ char *scheduled_shutdown_tty;
+
+ char *wall_message;
+ unsigned enable_wall_messages;
+ sd_event_source *wall_message_timeout_source;
sd_event_source *idle_action_event_source;
usec_t idle_action_usec;
@@ -185,3 +191,6 @@ int config_parse_tmpfs_size(const char *unit, const char *filename, unsigned lin
int manager_get_session_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Session **ret);
int manager_get_user_from_creds(Manager *m, sd_bus_message *message, uid_t uid, sd_bus_error *error, User **ret);
int manager_get_seat_from_creds(Manager *m, sd_bus_message *message, const char *name, sd_bus_error *error, Seat **ret);
+
+int manager_setup_wall_message_timer(Manager *m);
+bool logind_wall_tty_filter(const char *tty, void *userdata);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-08 13:15:55 +0000