2 * Copyright (c) 1987, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)mktemp.c 8.1 (Berkeley) 6/4/93
34 * $FreeBSD: src/lib/libc/stdio/mktemp.c,v 1.19.2.3 2002/06/18 09:53:07 robert Exp $
35 * $DragonFly: src/lib/libcr/stdio/Attic/mktemp.c,v 1.4 2004/07/05 17:31:00 eirikn Exp $
38 #include <sys/types.h>
48 char *_mktemp (char *);
50 static int _gettemp (char *, int *, int, int);
52 static const unsigned char padchar[] =
53 "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
56 mkstemps(char *path, int slen)
60 return (_gettemp(path, &fd, 0, slen) ? fd : -1);
68 return (_gettemp(path, &fd, 0, 0) ? fd : -1);
74 return (_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);
80 return (_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);
83 __warn_references(mktemp,
84 "warning: mktemp() possibly used unsafely; consider using mkstemp()");
89 return (_mktemp(path));
93 _gettemp(char *path, int *doopen, int domkdir, int slen)
95 char *start, *trv, *suffp;
101 if (doopen != NULL && domkdir) {
106 for (trv = path; *trv != '\0'; ++trv)
116 /* Fill space with random characters */
117 while (trv >= path && *trv == 'X') {
118 rand = arc4random() % (sizeof(padchar) - 1);
119 *trv-- = padchar[rand];
124 * check the target directory.
126 if (doopen != NULL || domkdir) {
127 for (; trv > path; --trv) {
130 rval = stat(path, &sbuf);
134 if (!S_ISDIR(sbuf.st_mode)) {
146 _open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)
150 } else if (domkdir) {
151 if (mkdir(path, 0700) == 0)
155 } else if (lstat(path, &sbuf))
156 return (errno == ENOENT);
158 /* If we have a collision, cycle through the space of filenames */
159 for (trv = start;;) {
160 if (*trv == '\0' || trv == suffp)
162 pad = strchr(padchar, *trv);
163 if (pad == NULL || *++pad == '\0')