use memcmp instead of str[n]cmp for temp function XXXXXX checking

[musl] / src / temp / mktemp.c

diff --git a/src/temp/mktemp.c b/src/temp/mktemp.c
index 1462a16..24c858b 100644 (file)
--- a/src/temp/mktemp.c
+++ b/src/temp/mktemp.c
@@ -1,33 +1,28 @@
 #include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
-#include <time.h>
-#include <stdint.h>
 #include "libc.h"
 
+char *__randname(char *);
+
 char *__mktemp(char *template)
 {
-       struct timespec ts;
        size_t l = strlen(template);
        int retries = 10000;
-       unsigned long r;
 
-       if (l < 6 || strcmp(template+l-6, "XXXXXX")) {
+       if (l < 6 || memcmp(template+l-6, "XXXXXX", 6)) {
                errno = EINVAL;
-               return 0;
+               *template = 0;
+               return template;
        }
-       clock_gettime(CLOCK_REALTIME, &ts);
-       r = ts.tv_nsec + (uintptr_t)&ts / 16 + (uintptr_t)template;
        while (retries--) {
-               snprintf(template+l-6, 7, "%06lX", r & 0xffffff);
+               __randname(template+l-6);
                if (access(template, F_OK) < 0) return template;
-               r = r * 1103515245 + 12345;
        }
+       *template = 0;
        errno = EEXIST;
-       return 0;
+       return template;
 }
 
 weak_alias(__mktemp, mktemp);