journald: DO recalculate the ACL mask, but only if it doesn't exist

[elogind.git] / src / shared / acl-util.c

diff --git a/src/shared/acl-util.c b/src/shared/acl-util.c
index 48bb12f46b7e73d156f136f2045ae835a871bf3a..fb04e49dc4367e74454bb9996b23823c42b4f926 100644 (file)
--- a/src/shared/acl-util.c
+++ b/src/shared/acl-util.c
@@ -69,6 +69,34 @@ int acl_find_uid(acl_t acl, uid_t uid, acl_entry_t *entry) {
         return 0;
 }
 
+int calc_acl_mask_if_needed(acl_t *acl_p) {
+        acl_entry_t i;
+        int found;
+
+        assert(acl_p);
+
+        for (found = acl_get_entry(*acl_p, ACL_FIRST_ENTRY, &i);
+             found > 0;
+             found = acl_get_entry(*acl_p, ACL_NEXT_ENTRY, &i)) {
+
+                acl_tag_t tag;
+
+                if (acl_get_tag_type(i, &tag) < 0)
+                        return -errno;
+
+                if (tag == ACL_MASK)
+                        return 0;
+        }
+
+        if (found < 0)
+                return -errno;
+
+        if (acl_calc_mask(acl_p) < 0)
+                return -errno;
+
+        return 0;
+}
+
 int search_acl_groups(char*** dst, const char* path, bool* belong) {
         acl_t acl;