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/*
* mkstemp(): create a unique temporary file
* written by Cornelius Krasel - (c) 2000
* bugfixes by Matthias Andree - (c) 2002
*
* See COPYING for restrictions on the use of this software.
*/
#include "config.h"
#include "system.h"
#if !HAVE_MKSTEMP
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#ifdef WITH_DMALLOC
#include <dmalloc.h>
#endif
#define ATTEMPTS 5
int
mkstemp(char *template)
{
int i, j, fd;
char *c;
char use[] = /* 62 chars to choose from */
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
c = (template + strlen(template) - 1);
i = 0;
while ((*c-- == 'X') && (*c != *template))
i++;
if (i < 6)
/* less than 6 X's */
return EINVAL;
i = 0;
while (i < ATTEMPTS) {
srand((unsigned int)(time(NULL) + i));
/* initialize random number generator */
for (j = 0; j < 6; j++) {
/* generate 0<x<61 from the random number and use it as index */
*(c + j + 1) = use[(int)(62.0 * rand() / (RAND_MAX + 1.0))];
}
fd = open(template, O_RDWR | O_EXCL | O_CREAT, 0600);
if (fd >= 0)
return fd; /* success */
i++;
}
return EEXIST; /* we failed */
}
#endif /* HAVE_MKSTEMP */
/* ANSI C forbids an empty source file... */
static void
dummy_func(void)
{
dummy_func();
}
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