mkstemp.c revision 5d54f3d8999eac1762fe0a8c7177d20f1f201fae
/*
* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <sys/file.h>
int
mkstemp(char *as)
{
char *s;
unsigned int pid;
int fd, i;
pid = getpid();
s = as;
while (*s++)
/* void */;
s--;
while (*--s == 'X') {
*s = (pid % 10) + '0';
pid /= 10;
}
s++;
i = 'a';
while ((fd = open(as, O_CREAT|O_EXCL|O_RDWR, 0600)) == -1) {
if (i == 'z')
return (-1);
*s = i++;
}
return (fd);
}