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/*
* 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. ***REMOVED*** - see
* 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 */
#ifdef macintosh
#include <unix.h>
#else
#include <sys/types.h>
#include <sys/stat.h>
#endif
#include <fcntl.h>
#include <errno.h>
#include <stdio.h>
#include <ctype.h>
#include "mcom_db.h"
#ifndef _WINDOWS
#include <unistd.h>
#endif
#ifdef _WINDOWS
#include <process.h>
#include "winfile.h"
#endif
static int _gettemp(char *path, register int *doopen, int extraFlags);
int
mkstemp(char *path)
{
int fd;
return (_gettemp(path, &fd, 0) ? fd : -1);
}
int
mkstempflags(char *path, int extraFlags)
{
int fd;
return (_gettemp(path, &fd, extraFlags) ? fd : -1);
}
/* NB: This routine modifies its input string, and does not always restore it.
** returns 1 on success, 0 on failure.
*/
static int
_gettemp(char *path, register int *doopen, int extraFlags)
{
register char *start, *trv;
struct stat sbuf;
unsigned 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) {
char saved;
if (trv <= path)
break;
saved = *trv;
if (saved == '/' || saved == '\\') {
int rv;
*trv = '\0';
rv = stat(path, &sbuf);
*trv = saved;
if (rv)
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 | extraFlags, 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((unsigned char)*trv))
*trv = 'a';
else
++*trv;
break;
}
}
}
/*NOTREACHED*/
}