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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* 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 "apr_private.h"
#include "apr_file_io.h" /* prototype of apr_mkstemp() */
#include "apr_strings.h" /* prototype of apr_mkstemp() */
#include "apr_arch_file_io.h" /* prototype of apr_mkstemp() */
#include "apr_portable.h" /* for apr_os_file_put() */
#include "apr_arch_inherit.h"
#ifndef HAVE_MKSTEMP
#if defined(SVR4) || defined(WIN32) || defined(NETWARE)
#ifdef SVR4
#if HAVE_INTTYPES_H
#include <inttypes.h>
#endif
#endif
#define arc4random() rand()
#define seedrandom(a) srand(a)
#else
#if APR_HAVE_STDINT_H
#include <stdint.h>
#endif
#define arc4random() random()
#define seedrandom(a) srandom(a)
#endif
#if APR_HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#if APR_HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#ifdef HAVE_TIME_H
#include <time.h>
#endif
static const unsigned char padchar[] =
"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
static apr_uint32_t randseed=0;
static int gettemp(char *path, apr_file_t **doopen, apr_int32_t flags, apr_pool_t *p)
{
register char *start, *trv, *suffp;
char *pad;
apr_finfo_t sbuf;
apr_status_t rv;
apr_uint32_t randnum;
if (randseed==0) {
randseed = (int)apr_time_now();
seedrandom(randseed);
}
for (trv = path; *trv; ++trv)
;
suffp = trv;
--trv;
if (trv < path) {
return APR_EINVAL;
}
/* Fill space with random characters */
while (*trv == 'X') {
randnum = arc4random() % (sizeof(padchar) - 1);
*trv-- = padchar[randnum];
}
start = trv + 1;
/*
* check the target directory.
*/
for (;; --trv) {
if (trv <= path)
break;
if (*trv == '/') {
*trv = '\0';
rv = apr_stat(&sbuf, path, APR_FINFO_TYPE, p);
*trv = '/';
if (rv != APR_SUCCESS)
return rv;
if (sbuf.filetype != APR_DIR) {
return APR_ENOTDIR;
}
break;
}
}
for (;;) {
if ((rv = apr_file_open(doopen, path, flags,
APR_UREAD | APR_UWRITE, p)) == APR_SUCCESS)
return APR_SUCCESS;
if (!APR_STATUS_IS_EEXIST(rv))
return rv;
/* If we have a collision, cycle through the space of filenames */
for (trv = start;;) {
if (*trv == '\0' || trv == suffp)
return APR_EINVAL; /* XXX: is this the correct return code? */
pad = strchr((char *)padchar, *trv);
if (pad == NULL || !*++pad) {
*trv++ = padchar[0];
}
else {
*trv++ = *pad;
break;
}
}
}
/*NOTREACHED*/
}
#else
#if APR_HAVE_STDLIB_H
#include <stdlib.h> /* for mkstemp() - Single Unix */
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h> /* for mkstemp() - FreeBSD */
#endif
#endif /* !defined(HAVE_MKSTEMP) */
APR_DECLARE(apr_status_t) apr_file_mktemp(apr_file_t **fp, char *template, apr_int32_t flags, apr_pool_t *p)
{
#ifdef HAVE_MKSTEMP
int fd;
#endif
flags = (!flags) ? APR_FOPEN_CREATE | APR_FOPEN_READ | APR_FOPEN_WRITE | APR_FOPEN_EXCL |
APR_FOPEN_DELONCLOSE : flags;
#ifndef HAVE_MKSTEMP
return gettemp(template, fp, flags, p);
#else
#ifdef HAVE_MKSTEMP64
fd = mkstemp64(template);
#else
fd = mkstemp(template);
#endif
if (fd == -1) {
return errno;
}
/* XXX: We must reset several flags values as passed-in, since
* mkstemp didn't subscribe to our preference flags.
*
* We either have to unset the flags, or fix up the fd and other
* xthread and inherit bits appropriately. Since gettemp() above
* calls apr_file_open, our flags are respected in that code path.
*/
apr_os_file_put(fp, &fd, flags, p);
(*fp)->fname = apr_pstrdup(p, template);
if (!(flags & APR_FOPEN_NOCLEANUP)) {
int flags;
if ((flags = fcntl(fd, F_GETFD)) == -1)
return errno;
flags |= FD_CLOEXEC;
if (fcntl(fd, F_SETFD, flags) == -1)
return errno;
apr_pool_cleanup_register((*fp)->pool, (void *)(*fp),
apr_unix_file_cleanup,
apr_unix_child_file_cleanup);
/* Clear APR_FOPEN_NOCLEANUP set by apr_os_file_put() */
(*fp)->flags &= ~APR_FOPEN_NOCLEANUP;
}
#endif
return APR_SUCCESS;
}
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