logind: don't hit assert when we try to free NULL manager object

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

diff --git a/src/login/logind-core.c b/src/login/logind-core.c
index 4ab66cd9bf0c3199791983fdfa01d6991cbe0fe9..e505fcb0ed987ad0c8f43beb5a2b4b37afc6c940 100644 (file)
--- a/src/login/logind-core.c
+++ b/src/login/logind-core.c
@@ -1,5 +1,3 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
 /***
   This file is part of systemd.
 
@@ -139,7 +137,7 @@ int manager_add_user_by_uid(Manager *m, uid_t uid, User **_user) {
         errno = 0;
         p = getpwuid(uid);
         if (!p)
-                return errno ? -errno : -ENOENT;
+                return errno > 0 ? -errno : -ENOENT;
 
         return manager_add_user(m, uid, p->pw_gid, p->pw_name, _user);
 }
@@ -278,8 +276,7 @@ int manager_process_button_device(Manager *m, struct udev_device *d) {
 }
 
 int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
-/// elogind does not support systemd units, but its own session system
-#if 0
+#if 0 /// elogind does not support systemd units, but its own session system
         _cleanup_free_ char *unit = NULL;
 #else
         _cleanup_free_ char *session_name = NULL;
@@ -292,8 +289,7 @@ int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
         if (pid < 1)
                 return -EINVAL;
 
-/// elogind does not support systemd units, but its own session system
-#if 0
+#if 0 /// elogind does not support systemd units, but its own session system
         r = cg_pid_get_unit(pid, &unit);
         if (r < 0)
                 return 0;
@@ -318,8 +314,7 @@ int manager_get_session_by_pid(Manager *m, pid_t pid, Session **session) {
 }
 
 int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) {
-/// elogind does not support systemd units, but its own session system
-#if 0
+#if 0 /// elogind does not support systemd units, but its own session system
         _cleanup_free_ char *unit = NULL;
         User *u;
 #else
@@ -333,8 +328,7 @@ int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) {
         if (pid < 1)
                 return -EINVAL;
 
-/// elogind does not support systemd units, but its own session system
-#if 0
+#if 0 /// elogind does not support systemd units, but its own session system
         r = cg_pid_get_slice(pid, &unit);
         if (r < 0)
                 return 0;
@@ -351,7 +345,6 @@ int manager_get_user_by_pid(Manager *m, pid_t pid, User **user) {
 
         *user = s->user;
 #endif // 0
-
         return 1;
 }
 
@@ -398,20 +391,19 @@ bool manager_shall_kill(Manager *m, const char *user) {
         assert(m);
         assert(user);
 
-        if (!m->kill_user_processes)
+        if (!m->kill_exclude_users && streq(user, "root"))
                 return false;
 
         if (strv_contains(m->kill_exclude_users, user))
                 return false;
 
-        if (strv_isempty(m->kill_only_users))
-                return true;
+        if (!strv_isempty(m->kill_only_users))
+                return strv_contains(m->kill_only_users, user);
 
-        return strv_contains(m->kill_only_users, user);
+        return m->kill_user_processes;
 }
 
-/// UNNEEDED by elogind
-#if 0
+#if 0 /// UNNEEDED by elogind
 static int vt_is_busy(unsigned int vtnr) {
         struct vt_stat vt_stat;
         int r = 0;
@@ -438,7 +430,7 @@ static int vt_is_busy(unsigned int vtnr) {
 }
 
 int manager_spawn_autovt(Manager *m, unsigned int vtnr) {
-        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         char name[sizeof("autovt@tty.service") + DECIMAL_STR_MAX(unsigned int)];
         int r;
 
@@ -533,7 +525,7 @@ static int manager_count_external_displays(Manager *m) {
                         continue;
 
                 /* Ignore internal displays: the type is encoded in
-                 * the sysfs name, as the second dash seperated item
+                 * the sysfs name, as the second dash separated item
                  * (the first is the card name, the last the connector
                  * number). We implement a whitelist of external
                  * displays here, rather than a whitelist, to ensure