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| | #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 *__mktemp(char *template)
{
struct timespec ts;
size_t i, l = strlen(template);
int retries = 10000;
unsigned long r;
if (l < 6 || strcmp(template+l-6, "XXXXXX")) {
errno = EINVAL;
*template = 0;
return template;
}
while (retries--) {
clock_gettime(CLOCK_REALTIME, &ts);
r = ts.tv_nsec + (uintptr_t)&ts / 16 + (uintptr_t)template;
for (i=1; i<=6; i++, r>>=4)
template[l-i] = 'A'+(r&15);
if (access(template, F_OK) < 0) return template;
}
*template = 0;
errno = EEXIST;
return template;
}
weak_alias(__mktemp, mktemp);
|