logind: add code for UTMP wall messages

[elogind.git] / src / login / logind.c

diff --git a/src/login/logind.c b/src/login/logind.c
index 845a229230fdf4f51bec4177681c530fc9285709..0d96bbdaa93e4656129252ed32503abdedbbfdf0 100644 (file)
--- a/src/login/logind.c
+++ b/src/login/logind.c
@@ -32,8 +32,11 @@
 #include "bus-error.h"
 #include "logind.h"
 #include "udev-util.h"
+#include "formats-util.h"
 
-Manager *manager_new(void) {
+static void manager_free(Manager *m);
+
+static Manager *manager_new(void) {
         Manager *m;
         int r;
 
@@ -42,7 +45,10 @@ Manager *manager_new(void) {
                 return NULL;
 
         m->console_active_fd = -1;
+        m->reserve_vt_fd = -1;
 
+        m->n_autovts = 6;
+        m->reserve_vt = 6;
         m->remove_ipc = true;
         m->inhibit_delay_max = 5 * USEC_PER_SEC;
         m->handle_power_key = HANDLE_POWEROFF;
@@ -96,7 +102,7 @@ fail:
         return NULL;
 }
 
-void manager_free(Manager *m) {
+static void manager_free(Manager *m) {
         Session *session;
         User *u;
         Device *d;
@@ -137,6 +143,9 @@ void manager_free(Manager *m) {
         set_free_free(m->busnames);
 
         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);
@@ -164,9 +173,14 @@ void manager_free(Manager *m) {
         sd_bus_unref(m->bus);
         sd_event_unref(m->event);
 
+        safe_close(m->reserve_vt_fd);
+
         strv_free(m->kill_only_users);
         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);
 }
@@ -545,6 +559,29 @@ static int manager_dispatch_console(sd_event_source *s, int fd, uint32_t revents
         return 0;
 }
 
+static int manager_reserve_vt(Manager *m) {
+        _cleanup_free_ char *p = NULL;
+
+        assert(m);
+
+        if (m->reserve_vt <= 0)
+                return 0;
+
+        if (asprintf(&p, "/dev/tty%u", m->reserve_vt) < 0)
+                return log_oom();
+
+        m->reserve_vt_fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK);
+        if (m->reserve_vt_fd < 0) {
+
+                /* Don't complain on VT-less systems */
+                if (errno != ENOENT)
+                        log_warning_errno(errno, "Failed to pin reserved VT: %m");
+                return -errno;
+        }
+
+        return 0;
+}
+
 static int manager_connect_bus(Manager *m) {
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
@@ -647,8 +684,8 @@ static int manager_connect_bus(Manager *m) {
                         &error,
                         NULL, NULL);
         if (r < 0) {
-                log_warning("Failed to subscribe to org.freedesktop.systemd1.Manager: %s",
-                            bus_error_message(&error, r));
+                log_error("Failed to enable subscription: %s", bus_error_message(&error, r));
+                return r;
         }
 
         r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
@@ -837,10 +874,30 @@ static int manager_connect_udev(Manager *m) {
                         return r;
         }
 
+        /* Don't bother watching VCSA devices, if nobody cares */
+        if (m->n_autovts > 0 && m->console_active_fd >= 0) {
+
+                m->udev_vcsa_monitor = udev_monitor_new_from_netlink(m->udev, "udev");
+                if (!m->udev_vcsa_monitor)
+                        return -ENOMEM;
+
+                r = udev_monitor_filter_add_match_subsystem_devtype(m->udev_vcsa_monitor, "vc", NULL);
+                if (r < 0)
+                        return r;
+
+                r = udev_monitor_enable_receiving(m->udev_vcsa_monitor);
+                if (r < 0)
+                        return r;
+
+                r = sd_event_add_io(m->event, &m->udev_vcsa_event_source, udev_monitor_get_fd(m->udev_vcsa_monitor), EPOLLIN, manager_dispatch_vcsa_udev, m);
+                if (r < 0)
+                        return r;
+        }
+
         return 0;
 }
 
-void manager_gc(Manager *m, bool drop_not_started) {
+static void manager_gc(Manager *m, bool drop_not_started) {
         Seat *seat;
         Session *session;
         User *user;
@@ -951,7 +1008,7 @@ static int manager_dispatch_idle_action(sd_event_source *s, uint64_t t, void *us
         return 0;
 }
 
-int manager_startup(Manager *m) {
+static int manager_startup(Manager *m) {
         int r;
         Seat *seat;
         Session *session;
@@ -1014,6 +1071,9 @@ int manager_startup(Manager *m) {
         /* Remove stale objects before we start them */
         manager_gc(m, false);
 
+        /* Reserve the special reserved VT */
+        manager_reserve_vt(m);
+
         /* And start everything */
         HASHMAP_FOREACH(seat, m->seats, i)
                 seat_start(seat);
@@ -1035,14 +1095,12 @@ int manager_startup(Manager *m) {
         return 0;
 }
 
-int manager_run(Manager *m) {
+static int manager_run(Manager *m) {
         int r;
 
         assert(m);
 
         for (;;) {
-                usec_t us = (uint64_t) -1;
-
                 r = sd_event_get_state(m->event);
                 if (r < 0)
                         return r;
@@ -1051,19 +1109,7 @@ int manager_run(Manager *m) {
 
                 manager_gc(m, true);
 
-                if (manager_dispatch_delayed(m) > 0)
-                        continue;
-
-                if (m->action_what != 0 && !m->action_job) {
-                        usec_t x, y;
-
-                        x = now(CLOCK_MONOTONIC);
-                        y = m->action_timestamp + m->inhibit_delay_max;
-
-                        us = x >= y ? 0 : y - x;
-                }
-
-                r = sd_event_run(m->event, us);
+                r = sd_event_run(m->event, (uint64_t) -1);
                 if (r < 0)
                         return r;
         }
@@ -1101,7 +1147,6 @@ int main(int argc, char *argv[]) {
          * existence of /run/systemd/seats/ to determine whether
          * logind is available, so please always make sure this check
          * stays in. */
-        mkdir_label("/run/systemd", 0755);
         mkdir_label("/run/systemd/seats", 0755);
         mkdir_label("/run/systemd/users", 0755);
         mkdir_label("/run/systemd/sessions", 0755);
@@ -1120,7 +1165,7 @@ int main(int argc, char *argv[]) {
                 goto finish;
         }
 
-        log_debug("logind running as pid "PID_FMT, getpid());
+        log_debug("systemd-logind running as pid "PID_FMT, getpid());
 
         sd_notify(false,
                   "READY=1\n"
@@ -1128,7 +1173,7 @@ int main(int argc, char *argv[]) {
 
         r = manager_run(m);
 
-        log_debug("logind stopped as pid "PID_FMT, getpid());
+        log_debug("systemd-logind stopped as pid "PID_FMT, getpid());
 
 finish:
         sd_notify(false,