Fix regression nickm pointed out

src/common/util.c

@@ -1889,6 +1889,8 @@ check_private_dir(const char *dirname, cpd_check_t check,
   struct stat st;
   char *f;
 #ifndef _WIN32
+  int mask = 0;
+  int perm = 0;
   const struct passwd *pw = NULL;
   uid_t running_uid;
   gid_t running_gid;
@@ -1986,29 +1988,31 @@ check_private_dir(const char *dirname, cpd_check_t check,
     tor_free(process_groupname);
     return -1;
   }
-  if (check & CPD_CHECK_MODE_ONLY) {
-    if (st.st_mode & 0077) {
-      log_warn(LD_FS, "Permissions on directory %s are too permissive.",
-               dirname);
-      return -1;
+  if(check & CPD_CHECK_MODE_ONLY) {
+    if(check & CPD_GROUP_OK || check & CPD_GROUP_READ) {
+      if (!st.st_mode & 0027) {
+        log_warn(LD_FS, "Incorrect permissions on directory %s a.", dirname);
+        return -1;
+      }
     }
   } else {
     log_warn(LD_FS, "Fixing permissions on directory %s", dirname);
     unsigned new_mode;
+    new_mode = 0700;
+    if (check & CPD_GROUP_OK) {
+      new_mode = 0700;
+    }
     if (check & CPD_GROUP_READ) {
       new_mode = 0750;
-    } else {
-      new_mode = 0700;
     }
     if (chmod(dirname, new_mode)) {
       log_warn(LD_FS, "Could not chmod directory %s: %s", dirname,
-          strerror(errno));
+               strerror(errno));
       return -1;
     } else {
       return 0;
     }
   }
-
 #endif
   return 0;
 }