core: introduce new RuntimeDirectory= and RuntimeDirectoryMode= unit settings

As discussed on the ML these are useful to manage runtime directories
below /run for services.

3 files changed, 6 insertions, 2 deletions

diff --git a/src/shared/exit-status.c b/src/shared/exit-status.c
index c1b04a3868..c1c0861168 100644
--- a/src/shared/exit-status.c
+++ b/src/shared/exit-status.c
@@ -142,6 +142,9 @@ const char* exit_status_to_string(ExitStatus status, ExitStatusLevel level) {
 
                 case EXIT_ADDRESS_FAMILIES:
                         return "ADDRESS_FAMILIES";
+
+                case EXIT_RUNTIME_DIRECTORY:
+                        return "RUNTIME_DIRECTORY";
                 }
         }
 
diff --git a/src/shared/exit-status.h b/src/shared/exit-status.h
index e7f12032ec..9dc3fce0bf 100644
--- a/src/shared/exit-status.h
+++ b/src/shared/exit-status.h
@@ -72,6 +72,7 @@ typedef enum ExitStatus {
         EXIT_PERSONALITY,  /* 230 */
         EXIT_APPARMOR_PROFILE,
         EXIT_ADDRESS_FAMILIES,
+        EXIT_RUNTIME_DIRECTORY
 } ExitStatus;
 
 typedef enum ExitStatusLevel {
diff --git a/src/shared/mkdir.c b/src/shared/mkdir.c
index 43c6ea6d4a..4a2cd5e662 100644
--- a/src/shared/mkdir.c
+++ b/src/shared/mkdir.c
@@ -42,8 +42,8 @@ int mkdir_safe_internal(const char *path, mode_t mode, uid_t uid, gid_t gid, mkd
                 return -errno;
 
         if ((st.st_mode & 0777) != mode ||
-            st.st_uid != uid ||
-            st.st_gid != gid ||
+            (uid != (uid_t) -1 && st.st_uid != uid) ||
+            (gid != (gid_t) -1 && st.st_gid != gid) ||
             !S_ISDIR(st.st_mode)) {
                 errno = EEXIST;
                 return -errno;