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