core: make RuntimeDirectory honor SELinux labels

[elogind.git] / src / system-update-generator / system-update-generator.c

diff --git a/src/system-update-generator/system-update-generator.c b/src/system-update-generator/system-update-generator.c
index 30fdbc3ee8cda3bfb1283493398016b94992a3cd..ad34ef1366a0bf90ab607da95460aadc3691bd19 100644 (file)
--- a/src/system-update-generator/system-update-generator.c
+++ b/src/system-update-generator/system-update-generator.c
@@ -35,30 +35,19 @@
 static const char *arg_dest = "/tmp";
 
 static int generate_symlink(void) {
-        struct stat st;
-        char *p;
+        const char *p = NULL;
 
-        if (lstat("/system-update", &st) < 0) {
+        if (laccess("/system-update", F_OK) < 0) {
                 if (errno == ENOENT)
                         return 0;
 
-                log_error("Failed to check for system update: %m");
+                log_error_errno(errno, "Failed to check for system update: %m");
                 return -EINVAL;
         }
 
-        p = strappend(arg_dest, "/default.target");
-        if (!p) {
-                log_error("Out of memory.");
-                return -ENOMEM;
-        }
-
-        if (symlink(SYSTEM_DATA_UNIT_PATH "/system-update.target", p) < 0) {
-                free(p);
-                log_error("Failed to create symlink: %m");
-                return -errno;
-        }
-
-        free(p);
+        p = strjoina(arg_dest, "/default.target");
+        if (symlink(SYSTEM_DATA_UNIT_PATH "/system-update.target", p) < 0)
+                return log_error_errno(errno, "Failed to create symlink %s: %m", p);
 
         return 0;
 }
@@ -66,15 +55,15 @@ static int generate_symlink(void) {
 int main(int argc, char *argv[]) {
         int r;
 
-        if (argc > 2) {
-                log_error("This program takes one or no arguments.");
+        if (argc > 1 && argc != 4) {
+                log_error("This program takes three or no arguments.");
                 return EXIT_FAILURE;
         }
 
         if (argc > 1)
-                arg_dest = argv[1];
+                arg_dest = argv[2];
 
-        log_set_target(LOG_TARGET_AUTO);
+        log_set_target(LOG_TARGET_SAFE);
         log_parse_environment();
         log_open();