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authorDaniel Mack <daniel@zonque.org>2015-04-23 17:11:28 +0200
committerDaniel Mack <daniel@zonque.org>2015-04-24 17:48:12 +0200
commit867c37f6bb20886204679df9a43c973e2d7e44a5 (patch)
tree9ee29c9c237d6afd52cbefab9ac6b800aed77d19
parente2fa5721c3ee5ea400b99a6463e8c1c257e20415 (diff)
logind: add support for /run/nologin and /run/systemd/shutdown/scheduled
Port over more code from shutdownd and teach logind to write /run/nologin at least 5 minutes before the system is going down, and /run/systemd/shutdown/scheduled when a shutdown is scheduled.
-rw-r--r--src/login/logind-dbus.c88
-rw-r--r--src/login/logind.c4
-rw-r--r--src/login/logind.h2
3 files changed, 94 insertions, 0 deletions
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 80514f3d2..1eda3c2c8 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -1770,6 +1770,71 @@ static int method_suspend(sd_bus *bus, sd_bus_message *message, void *userdata,
error);
}
+static int nologin_timeout_handler(
+ sd_event_source *s,
+ uint64_t usec,
+ void *userdata) {
+
+ Manager *m = userdata;
+ int r;
+
+ log_info("Creating /run/nologin, blocking further logins...");
+
+ r = write_string_file_atomic("/run/nologin", "System is going down.");
+ if (r < 0)
+ log_error_errno(r, "Failed to create /run/nologin: %m");
+ else
+ m->unlink_nologin = true;
+
+ return 0;
+}
+
+static int update_schedule_file(Manager *m) {
+
+ int r;
+ _cleanup_fclose_ FILE *f = NULL;
+ _cleanup_free_ char *t = NULL, *temp_path = NULL;
+
+ assert(m);
+
+ r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
+ if (r < 0)
+ return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
+
+ t = cescape(m->wall_message);
+ if (!t)
+ return log_oom();
+
+ r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
+
+ (void) fchmod(fileno(f), 0644);
+
+ fprintf(f,
+ "USEC="USEC_FMT"\n"
+ "WARN_WALL=%i\n"
+ "MODE=%s\n",
+ m->scheduled_shutdown_timeout,
+ m->enable_wall_messages,
+ m->scheduled_shutdown_type);
+
+ if (!isempty(m->wall_message))
+ fprintf(f, "WALL_MESSAGE=%s\n", t);
+
+ (void) fflush_and_check(f);
+
+ if (ferror(f) || rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
+ log_error_errno(errno, "Failed to write information about scheduled shutdowns: %m");
+ r = -errno;
+
+ (void) unlink(temp_path);
+ (void) unlink("/run/systemd/shutdown/scheduled");
+ }
+
+ return r;
+}
+
static int manager_scheduled_shutdown_handler(
sd_event_source *s,
uint64_t usec,
@@ -1857,6 +1922,21 @@ static int method_schedule_shutdown(sd_bus *bus, sd_bus_message *message, void *
return log_oom();
}
+ if (m->nologin_timeout_source) {
+ r = sd_event_source_set_time(m->nologin_timeout_source, elapse);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_source_set_time() failed: %m\n");
+
+ r = sd_event_source_set_enabled(m->nologin_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->nologin_timeout_source,
+ CLOCK_REALTIME, elapse - 5 * USEC_PER_MINUTE, 0, nologin_timeout_handler, m);
+ if (r < 0)
+ return log_error_errno(r, "sd_event_add_time() failed: %m\n");
+ }
+
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);
@@ -1877,6 +1957,13 @@ static int method_schedule_shutdown(sd_bus *bus, sd_bus_message *message, void *
if (r < 0)
return r;
+ if (!isempty(type)) {
+ r = update_schedule_file(m);
+ if (r < 0)
+ return r;
+ } else
+ (void) unlink("/run/systemd/shutdown/scheduled");
+
return sd_bus_reply_method_return(message, NULL);
}
@@ -1891,6 +1978,7 @@ static int method_cancel_scheduled_shutdown(sd_bus *bus, sd_bus_message *message
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);
+ m->nologin_timeout_source = sd_event_source_unref(m->nologin_timeout_source);
free(m->scheduled_shutdown_type);
m->scheduled_shutdown_type = NULL;
m->scheduled_shutdown_timeout = 0;
diff --git a/src/login/logind.c b/src/login/logind.c
index 0d96bbdaa..7520f1345 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->nologin_timeout_source);
sd_event_source_unref(m->wall_message_timeout_source);
sd_event_source_unref(m->console_active_event_source);
@@ -168,6 +169,9 @@ static void manager_free(Manager *m) {
if (m->udev)
udev_unref(m->udev);
+ if (m->unlink_nologin)
+ unlink("/run/nologin");
+
bus_verify_polkit_async_registry_free(m->polkit_registry);
sd_bus_unref(m->bus);
diff --git a/src/login/logind.h b/src/login/logind.h
index 1c60b0186..56c05b850 100644
--- a/src/login/logind.h
+++ b/src/login/logind.h
@@ -102,6 +102,8 @@ struct Manager {
sd_event_source *scheduled_shutdown_timeout_source;
uid_t scheduled_shutdown_uid;
char *scheduled_shutdown_tty;
+ sd_event_source *nologin_timeout_source;
+ bool unlink_nologin;
char *wall_message;
unsigned enable_wall_messages;