+/*
+ * Return 1 if the given path is readable by the current UID or 0 if not.
+ * Return -1 if the path is EPERM.
+ */
+static int validate_file_read_creds(const char *path)
+{
+ int ret;
+
+ assert(path);
+
+ /* Can we read the file. */
+ ret = access(path, R_OK);
+ if (!ret) {
+ goto valid;
+ }
+ if (errno == EACCES) {
+ return -1;
+ } else {
+ /* Invalid. */
+ return 0;
+ }
+valid:
+ return 1;
+}
+