- int retries = 100, t0 = *template;
- while (retries--) {
- if (!*__mktemp(template)) return 0;
- if (!mkdir(template, 0700)) return template;
- if (errno != EEXIST) return 0;
- /* this is safe because mktemp verified
- * that we have a valid template string */
- template[0] = t0;
- strcpy(template+strlen(template)-6, "XXXXXX");
+ size_t l = strlen(template);
+ int retries = 100;
+
+ if (l<6 || memcmp(template+l-6, "XXXXXX", 6)) {
+ errno = EINVAL;
+ return 0;