1#define _BSD_SOURCE
 2#include <stdlib.h>
 3#include <string.h>
 4#include <fcntl.h>
 5#include <unistd.h>
 6#include <errno.h>
 7
 8int __mkostemps(char *template, int len, int flags)
 9{
10	size_t l = strlen(template);
11	if (l<6 || len>l-6 || memcmp(template+l-len-6, "XXXXXX", 6)) {
12		errno = EINVAL;
13		return -1;
14	}
15
16	flags -= flags & O_ACCMODE;
17	int fd, retries = 100;
18	do {
19		__randname(template+l-len-6);
20		if ((fd = open(template, flags | O_RDWR | O_CREAT | O_EXCL, 0600))>=0)
21			return fd;
22	} while (--retries && errno == EEXIST);
23
24	memcpy(template+l-len-6, "XXXXXX", 6);
25	return -1;
26}
27
28weak_alias(__mkostemps, mkostemps);