2 * Copyright (c) 1987 Regents of the University of California.
5 * Redistribution and use in source and binary forms are permitted
6 * provided that: (1) source distributions retain this entire copyright
7 * notice and comment, and (2) distributions including binaries display
8 * the following acknowledgement: ``This product includes software
9 * developed by the University of California, Berkeley and its contributors''
10 * in the documentation or other materials provided with the distribution
11 * and in all advertising materials mentioning features or use of this
12 * software. Neither the name of the University nor the names of its
13 * contributors may be used to endorse or promote products derived
14 * from this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
20 #if defined(LIBC_SCCS) && !defined(lint)
21 static char sccsid[] = "@(#)mktemp.c 5.9 (Berkeley) 6/1/90";
22 #endif /* LIBC_SCCS and not lint */
24 static int _mktemp_dummy;
28 #include <sys/types.h>
40 return (_gettemp(path, &fd) ? fd : -1);
47 return(_gettemp(path, (int *)NULL) ? path : (char *)NULL);
51 _gettemp(path, doopen)
56 register char *start, *trv;
61 for (trv = path; *trv; ++trv); /* extra X's get set to 0's */
62 while (*--trv == 'X') {
63 *trv = (pid % 10) + '0';
68 * check the target directory; if you have six X's and it
69 * doesn't exist this runs for a *very* long time.
71 for (start = trv + 1;; --trv) {
76 if (stat(path, &sbuf))
78 if (!S_ISDIR(sbuf.st_mode)) {
90 open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
95 else if (stat(path, &sbuf))
96 return(errno == ENOENT ? 1 : 0);
98 /* tricky little algorithm for backward compatibility */