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-rw-r--r--src/login/logind-dbus.c30
-rw-r--r--src/login/pam-module.c71
2 files changed, 98 insertions, 3 deletions
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index d8f4d89474..ea6b89faa1 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -80,6 +80,9 @@
" <arg name=\"seat\" type=\"s\" direction=\"out\"/>\n" \
" <arg name=\"vtnr\" type=\"u\" direction=\"out\"/>\n" \
" </method>\n" \
+ " <method name=\"ReleaseSession\">\n" \
+ " <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
+ " </method>\n" \
" <method name=\"ActivateSession\">\n" \
" <arg name=\"id\" type=\"s\" direction=\"in\"/>\n" \
" </method>\n" \
@@ -1075,6 +1078,33 @@ static DBusHandlerResult manager_message_handler(
if (r < 0)
return bus_send_error_reply(connection, message, &error, r);
+ } else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ReleaseSession")) {
+ const char *name;
+ Session *session;
+
+ if (!dbus_message_get_args(
+ message,
+ &error,
+ DBUS_TYPE_STRING, &name,
+ DBUS_TYPE_INVALID))
+ return bus_send_error_reply(connection, message, &error, -EINVAL);
+
+ session = hashmap_get(m->sessions, name);
+ if (!session)
+ return bus_send_error_reply(connection, message, &error, -ENOENT);
+
+ /* We use the FIFO to detect stray sessions where the
+ process invoking PAM dies abnormally. We need to make
+ sure that that process is not killed if at the clean
+ end of the session it closes the FIFO. Hence, with
+ this call explicitly turn off the FIFO logic, so that
+ the PAM code can finish clean up on its own */
+ session_remove_fifo(session);
+
+ reply = dbus_message_new_method_return(message);
+ if (!reply)
+ goto oom;
+
} else if (dbus_message_is_method_call(message, "org.freedesktop.login1.Manager", "ActivateSession")) {
const char *name;
Session *session;
diff --git a/src/login/pam-module.c b/src/login/pam-module.c
index 8544413a08..4106d2ba4b 100644
--- a/src/login/pam-module.c
+++ b/src/login/pam-module.c
@@ -414,7 +414,6 @@ _public_ PAM_EXTERN int pam_sm_open_session(
"/org/freedesktop/login1",
"org.freedesktop.login1.Manager",
"CreateSession");
-
if (!m) {
pam_syslog(handle, LOG_ERR, "Could not allocate create session message.");
r = PAM_BUF_ERR;
@@ -620,11 +619,77 @@ _public_ PAM_EXTERN int pam_sm_close_session(
int argc, const char **argv) {
const void *p = NULL;
+ const char *id;
+ DBusConnection *bus = NULL;
+ DBusMessage *m = NULL, *reply = NULL;
+ DBusError error;
+ int r;
- pam_get_data(handle, "systemd.session-fd", &p);
+ assert(handle);
+
+ dbus_error_init(&error);
+
+ id = pam_getenv(handle, "XDG_SESSION_ID");
+ if (id) {
+
+ /* Before we go and close the FIFO we need to tell
+ * logind that this is a clean session shutdown, so
+ * that it doesn't just go and slaughter us
+ * immediately after closing the fd */
+
+ bus = dbus_bus_get_private(DBUS_BUS_SYSTEM, &error);
+ if (!bus) {
+ pam_syslog(handle, LOG_ERR, "Failed to connect to system bus: %s", bus_error_message(&error));
+ r = PAM_SESSION_ERR;
+ goto finish;
+ }
+
+ m = dbus_message_new_method_call(
+ "org.freedesktop.login1",
+ "/org/freedesktop/login1",
+ "org.freedesktop.login1.Manager",
+ "ReleaseSession");
+ if (!m) {
+ pam_syslog(handle, LOG_ERR, "Could not allocate release session message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
+
+ if (!dbus_message_append_args(m,
+ DBUS_TYPE_STRING, &id,
+ DBUS_TYPE_INVALID)) {
+ pam_syslog(handle, LOG_ERR, "Could not attach parameters to message.");
+ r = PAM_BUF_ERR;
+ goto finish;
+ }
+ reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error);
+ if (!reply) {
+ pam_syslog(handle, LOG_ERR, "Failed to release session: %s", bus_error_message(&error));
+ r = PAM_SESSION_ERR;
+ goto finish;
+ }
+ }
+
+ r = PAM_SUCCESS;
+
+finish:
+ pam_get_data(handle, "systemd.session-fd", &p);
if (p)
close_nointr(PTR_TO_INT(p) - 1);
- return PAM_SUCCESS;
+ dbus_error_free(&error);
+
+ if (bus) {
+ dbus_connection_close(bus);
+ dbus_connection_unref(bus);
+ }
+
+ if (m)
+ dbus_message_unref(m);
+
+ if (reply)
+ dbus_message_unref(reply);
+
+ return r;
}