/* * Copyright (c) 1987, 1993 *	The Regents of the University of California.  All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright *    notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright *    notice, this list of conditions and the following disclaimer in the *    documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software *    must display the following acknowledgement: *	This product includes software developed by the University of *	California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors *    may be used to endorse or promote products derived from this software *    without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */#if defined(LIBC_SCCS) && !defined(lint)static char sccsid[] = "@(#)mktemp.c	8.1 (Berkeley) 6/4/93";#endif /* LIBC_SCCS and not lint */#include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <errno.h>#include <stdio.h>#include <ctype.h>#include <unistd.h>#include <stdlib.h>static int _gettemp(char*,int*);mkstemp(path)	char *path;{	int fd;	return (_gettemp(path, &fd) ? fd : -1);}char *mktemp(path)	char *path;{	return(_gettemp(path, (int *)NULL) ? path : (char *)NULL);}static_gettemp(path, doopen)	char *path;	register int *doopen;{	extern int errno;	register char *start, *trv;	struct stat sbuf;	u_int pid;	pid = getpid();	for (trv = path; *trv; ++trv);		/* extra X's get set to 0's */	while (*--trv == 'X') {		*trv = (pid % 10) + '0';		pid /= 10;	}	/*	 * check the target directory; if you have six X's and it	 * doesn't exist this runs for a *very* long time.	 */	for (start = trv + 1;; --trv) {		if (trv <= path)			break;		if (*trv == '/') {			*trv = '\0';			if (stat(path, &sbuf))				return(0);			if (!S_ISDIR(sbuf.st_mode)) {				errno = ENOTDIR;				return(0);			}			*trv = '/';			break;		}	}	for (;;) {		if (doopen) {			if ((*doopen =			    open(path, O_CREAT|O_EXCL|O_RDWR, 0600)) >= 0)				return(1);			if (errno != EEXIST)				return(0);		}		else if (stat(path, &sbuf))			return(errno == ENOENT ? 1 : 0);		/* tricky little algorithm for backward compatibility */		for (trv = start;;) {			if (!*trv)				return(0);			if (*trv == 'z')				*trv++ = 'a';			else {				if (isdigit(*trv))					*trv = 'a';				else					++*trv;				break;			}		}	}	/*NOTREACHED*/}/* * $PchId: mktemp.c,v 1.3 1995/11/20 19:10:39 philip Exp $ */