/* * 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. */ #include <sys/types.h>#include <sys/stat.h>#include <fcntl.h>#include <errno.h>#include <stdio.h>#include <stdlib.h>#include <string.h>#include <ctype.h>#include <unistd.h> char *_mktemp(char *); static int _gettemp(char *, int *, int, int); static const unsigned char padchar[] ="0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"; intmkstemps(path, slen)	char *path;	int slen;{	int fd; 	return (_gettemp(path, &fd, 0, slen) ? fd : -1);} intmkstemp(path)	char *path;{	int fd; 	return (_gettemp(path, &fd, 0, 0) ? fd : -1);} char *mkdtemp(path)	char *path;{	return (_gettemp(path, (int *)NULL, 1, 0) ? path : (char *)NULL);} char *_mktemp(path)	char *path;{	return (_gettemp(path, (int *)NULL, 0, 0) ? path : (char *)NULL);} char *mktemp(path)	char *path;{	return (_mktemp(path));} static int_gettemp(path, doopen, domkdir, slen)	char *path;	int *doopen;	int domkdir;	int slen;{	char *start, *trv, *suffp;	char *pad;	struct stat sbuf;	int rval;	uint32_t randx; 	if (doopen != NULL && domkdir) {		errno = EINVAL;		return (0);	} 	for (trv = path; *trv != '\0'; ++trv)		;	trv -= slen;	suffp = trv;	--trv;	if (trv < path) {		errno = EINVAL;		return (0);	} 	/* Fill space with random characters */	while (trv >= path && *trv == 'X') {		randx = rand() % (sizeof(padchar) - 1);		*trv-- = padchar[randx];	}	start = trv + 1; 	/*	 * check the target directory.	 */	if (doopen != NULL || domkdir) {		for (; trv > path; --trv) {			if (*trv == '/') {				*trv = '\0';				rval = stat(path, &sbuf);				*trv = '/';				if (rval != 0)					return (0);				if (!S_ISDIR(sbuf.st_mode)) {					errno = ENOTDIR;					return (0);				}				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 (domkdir) {			if (mkdir(path, 0700) == 0)				return (1);			if (errno != EEXIST)				return (0);		} else if (lstat(path, &sbuf))			return (errno == ENOENT); 		/* If we have a collision, cycle through the space of filenames */		for (trv = start;;) {			if (*trv == '\0' || trv == suffp)				return (0);			pad = strchr(padchar, *trv);			if (pad == NULL || *++pad == '\0')				*trv++ = padchar[0];			else {				*trv++ = *pad;				break;			}		}	}	/*NOTREACHED*/}