logind: autospawn gettys when necessary

diff --git a/Makefile.am b/Makefile.am
index bfc107950ce761db2f1e7f723dcce49c18abfe56..dc1a87ed5c138a886b290fa6a60b4ab391777ede 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -1513,26 +1513,23 @@ endif
                $(LN_S) graphical.target runlevel5.target && \
                $(LN_S) reboot.target runlevel6.target )
        ( cd $(DESTDIR)$(systemunitdir) && \
-               rm -f default.target ctrl-alt-del.target dbus-org.freedesktop.hostname1.service dbus-org.freedesktop.locale1.service dbus-org.freedesktop.timedate1.service dbus-org.freedesktop.login1.service && \
+               rm -f default.target ctrl-alt-del.target dbus-org.freedesktop.hostname1.service dbus-org.freedesktop.locale1.service dbus-org.freedesktop.timedate1.service dbus-org.freedesktop.login1.service autovt-getty@.service && \
                $(LN_S) graphical.target default.target && \
                $(LN_S) reboot.target ctrl-alt-del.target && \
                 $(LN_S) systemd-hostnamed.service dbus-org.freedesktop.hostname1.service && \
                 $(LN_S) systemd-localed.service dbus-org.freedesktop.locale1.service && \
                 $(LN_S) systemd-timedated.service dbus-org.freedesktop.timedate1.service && \
-                $(LN_S) systemd-logind.service dbus-org.freedesktop.login1.service )
+                $(LN_S) systemd-logind.service dbus-org.freedesktop.login1.service && \
+                $(LN_S) getty@.service autovt-getty@.service )
        ( cd $(DESTDIR)$(systemunitdir)/multi-user.target.wants && \
-               rm -f getty.target systemd-user-sessions.service systemd-ask-password-wall.path && \
+               rm -f getty.target systemd-user-sessions.service systemd-ask-password-wall.path systemd-logind.service && \
                $(LN_S) ../getty.target getty.target && \
                $(LN_S) ../systemd-user-sessions.service systemd-user-sessions.service && \
-               $(LN_S) ../systemd-ask-password-wall.path systemd-ask-password-wall.path )
+               $(LN_S) ../systemd-ask-password-wall.path systemd-ask-password-wall.path && \
+                $(LN_S) ../systemd-logind.service systemd-logind.service )
        ( cd $(DESTDIR)$(pkgsysconfdir)/system/getty.target.wants && \
-               rm -f getty@tty1.service getty@tty2.service getty@tty3.service getty@tty4.service getty@tty5.service getty@tty6.service && \
-               $(LN_S) $(systemunitdir)/getty@.service getty@tty1.service && \
-               $(LN_S) $(systemunitdir)/getty@.service getty@tty2.service && \
-               $(LN_S) $(systemunitdir)/getty@.service getty@tty3.service && \
-               $(LN_S) $(systemunitdir)/getty@.service getty@tty4.service && \
-               $(LN_S) $(systemunitdir)/getty@.service getty@tty5.service && \
-               $(LN_S) $(systemunitdir)/getty@.service getty@tty6.service )
+               rm -f getty@tty1.service && \
+               $(LN_S) $(systemunitdir)/getty@.service getty@tty1.service )
        ( cd $(DESTDIR)$(pkgsysconfdir)/system/multi-user.target.wants && \
                rm -f remote-fs.target && \
                $(LN_S) $(systemunitdir)/remote-fs.target remote-fs.target )

diff --git a/src/logind.c b/src/logind.c
index 3100fd25177a010e8d0efaaf25790fa4f7172f13..701ef494e8c84dbc1f80d5ab19cca353ad346762 100644 (file)
--- a/src/logind.c
+++ b/src/logind.c
@@ -652,7 +652,13 @@ static int vt_is_busy(int vtnr) {
 
         assert(vtnr >= 1);
 
-        fd = open_terminal("/dev/tty0", O_RDWR|O_NOCTTY|O_CLOEXEC);
+        /* We explicitly open /dev/tty1 here instead of /dev/tty0. If
+         * we'd open the latter we'd open the foreground tty which
+         * hence would be unconditionally busy. By opening /dev/tty1
+         * we avoid this. Since tty1 is special and needs to be an
+         * explicitly loaded getty or DM this is safe. */
+
+        fd = open_terminal("/dev/tty1", O_RDWR|O_NOCTTY|O_CLOEXEC);
         if (fd < 0)
                 return -errno;
 
@@ -668,16 +674,61 @@ static int vt_is_busy(int vtnr) {
 
 int manager_spawn_autovt(Manager *m, int vtnr) {
         int r;
+        DBusMessage *message = NULL, *reply = NULL;
+        char *name = NULL;
+        const char *mode = "fail";
+        DBusError error;
 
         assert(m);
 
+        dbus_error_init(&error);
+
         r = vt_is_busy(vtnr);
         if (r != 0)
                 return r;
 
-        /* ... */
+        message = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit");
+        if (!message) {
+                log_error("Could not allocate message.");
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        if (asprintf(&name, "autovt-getty@tty%i.service", vtnr) < 0) {
+                log_error("Could not allocate service name.");
+                r = -ENOMEM;
+                goto finish;
+        }
 
-        return 0;
+        if (!dbus_message_append_args(message,
+                                      DBUS_TYPE_STRING, &name,
+                                      DBUS_TYPE_STRING, &mode,
+                                      DBUS_TYPE_INVALID)) {
+                log_error("Could not attach target and flag information to message.");
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        reply = dbus_connection_send_with_reply_and_block(m->bus, message, -1, &error);
+        if (!reply) {
+                log_error("Failed to start unit: %s", bus_error_message(&error));
+                goto finish;
+        }
+
+        r = 0;
+
+finish:
+        free(name);
+
+        if (message)
+                dbus_message_unref(message);
+
+        if (reply)
+                dbus_message_unref(reply);
+
+        dbus_error_free(&error);
+
+        return r;
 }
 
 void manager_cgroup_notify_empty(Manager *m, const char *cgroup) {

diff --git a/units/getty@.service.m4 b/units/getty@.service.m4
index bfceb39fde4f96e77ec26e2eaa93e6e85437f910..b1115672bb99026240ffd68a2051d9f66ff27439 100644 (file)
--- a/units/getty@.service.m4
+++ b/units/getty@.service.m4
@@ -51,4 +51,4 @@ Environment=LANG= LC_CTYPE= LC_NUMERIC= LC_TIME= LC_COLLATE= LC_MONETARY= LC_MES
 KillSignal=SIGHUP
 
 [Install]
-Alias=getty.target.wants/getty@tty1.service getty.target.wants/getty@tty2.service getty.target.wants/getty@tty3.service getty.target.wants/getty@tty4.service getty.target.wants/getty@tty5.service getty.target.wants/getty@tty6.service
+Alias=getty.target.wants/getty@tty1.service