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* Copyright (c) 1987, 1993
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* The Regents of the University of California. All rights reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)mktemp.c 8.1 (Berkeley) 6/4/93";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#if !defined(_WINDOWS) && !defined(XP_OS2_VACPP)
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static int _gettemp(char *path, register int *doopen, int extraFlags);
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FILE *temp = tmpfile();
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return (temp ? fileno(temp) : -1);
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return (_gettemp(path, &fd, 0) ? fd : -1);
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mkstempflags(char *path, int extraFlags)
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return (_gettemp(path, &fd, extraFlags) ? fd : -1);
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return(_gettemp(path, (int *)NULL, 0) ? path : (char *)NULL);
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/* NB: This routine modifies its input string, and does not always restore it.
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** returns 1 on success, 0 on failure.
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_gettemp(char *path, register int *doopen, int extraFlags)
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#if !defined(_WINDOWS) || defined(_WIN32)
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register char *start, *trv;
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for (trv = path; *trv; ++trv); /* extra X's get set to 0's */
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while (*--trv == 'X') {
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*trv = (pid % 10) + '0';
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* check the target directory; if you have six X's and it
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* doesn't exist this runs for a *very* long time.
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for (start = trv + 1;; --trv) {
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if (saved == '/' || saved == '\\') {
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rv = stat(path, &sbuf);
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if (!S_ISDIR(sbuf.st_mode)) {
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open(path, O_CREAT|O_EXCL|O_RDWR|extraFlags, 0600)) >= 0)
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else if (stat(path, &sbuf))
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return(errno == ENOENT ? 1 : 0);
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/* tricky little algorithm for backward compatibility */
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for (trv = start;;) {