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