1 /* OPENBSD ORIGINAL: lib/libc/stdio/mktemp.c */
3 /* THIS FILE HAS BEEN MODIFIED FROM THE ORIGINAL OPENBSD SOURCE */
4 /* Changes: Removed mktemp */
7 * Copyright (c) 1987, 1993
8 * The Regents of the University of California. All rights reserved.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #if !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP)
39 #if defined(LIBC_SCCS) && !defined(lint)
40 static char rcsid[] = "$OpenBSD: mktemp.c,v 1.17 2003/06/02 20:18:37 millert Exp $";
41 #endif /* LIBC_SCCS and not lint */
44 #define open binary_open
45 extern int binary_open();
48 static int _gettemp(char *, int *, int, int);
57 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
66 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
73 return(_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
77 _gettemp(path, doopen, domkdir, slen)
83 register char *start, *trv, *suffp;
88 if (doopen && domkdir) {
93 for (trv = path; *trv; ++trv)
103 while (trv >= path && *trv == 'X' && pid != 0) {
104 *trv-- = (pid % 10) + '0';
107 while (trv >= path && *trv == 'X') {
110 pid = (arc4random() & 0xffff) % (26+26);
114 c = (pid - 26) + 'a';
120 * check the target directory; if you have six X's and it
121 * doesn't exist this runs for a *very* long time.
123 if (doopen || domkdir) {
129 rval = stat(path, &sbuf);
133 if (!S_ISDIR(sbuf.st_mode)) {
145 open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
149 } else if (domkdir) {
150 if (mkdir(path, 0700) == 0)
154 } else if (lstat(path, &sbuf))
155 return(errno == ENOENT ? 1 : 0);
157 /* tricky little algorithm for backward compatibility */
158 for (trv = start;;) {
168 else if (*trv == 'z') /* inc from z to A */
182 #endif /* !defined(HAVE_MKDTEMP) || defined(HAVE_STRICT_MKSTEMP) */