#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include "libc.h"
-char *mktemp(char *template)
+char *__randname(char *);
+
+char *__mktemp(char *template)
{
- static int lock;
- static int index;
- int l = strlen(template);
+ size_t l = strlen(template);
+ int retries = 10000;
- if (l < 6 || strcmp(template+l-6, "XXXXXX")) {
+ if (l < 6 || memcmp(template+l-6, "XXXXXX", 6)) {
errno = EINVAL;
- return NULL;
+ *template = 0;
+ return template;
}
- LOCK(&lock);
- for (; index < 1000000; index++) {
- snprintf(template+l-6, 6, "%06d", index);
- if (access(template, F_OK) != 0) {
- UNLOCK(&lock);
- return template;
- }
+ while (retries--) {
+ __randname(template+l-6);
+ if (access(template, F_OK) < 0) return template;
}
- UNLOCK(&lock);
- return NULL;
+ *template = 0;
+ errno = EEXIST;
+ return template;
}
+
+weak_alias(__mktemp, mktemp);