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php-src/main/php_open_temporary_file.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2011 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "php.h"
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#ifdef PHP_WIN32
#define O_RDONLY _O_RDONLY
#include "win32/param.h"
#include "win32/winutil.h"
#elif defined(NETWARE)
#ifdef USE_WINSOCK
#include <novsock2.h>
#else
#include <sys/socket.h>
#endif
#include <sys/param.h>
#else
#include <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#if HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h>
#endif
#if !defined(P_tmpdir)
#define P_tmpdir ""
#endif
/* {{{ php_do_open_temporary_file */
/* Loosely based on a tempnam() implementation by UCLA */
/*
* Copyright (c) 1988, 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.
*/
static int php_do_open_temporary_file(const char *path, const char *pfx, char **opened_path_p TSRMLS_DC)
{
char *trailing_slash;
char *opened_path;
char cwd[MAXPATHLEN];
cwd_state new_state;
int fd = -1;
#ifndef HAVE_MKSTEMP
int open_flags = O_CREAT | O_TRUNC | O_RDWR
#ifdef PHP_WIN32
| _O_BINARY
#endif
;
#endif
if (!path || !path[0]) {
return -1;
}
#ifdef PHP_WIN32
if (!php_win32_check_trailing_space(pfx, (const int)strlen(pfx))) {
SetLastError(ERROR_INVALID_NAME);
return -1;
}
#endif
if (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
cwd[0] = '\0';
}
new_state.cwd = strdup(cwd);
new_state.cwd_length = strlen(cwd);
if (virtual_file_ex(&new_state, path, NULL, CWD_REALPATH TSRMLS_CC)) {
free(new_state.cwd);
return -1;
}
if (IS_SLASH(new_state.cwd[new_state.cwd_length - 1])) {
trailing_slash = "";
} else {
trailing_slash = "/";
}
if (spprintf(&opened_path, 0, "%s%s%sXXXXXX", new_state.cwd, trailing_slash, pfx) >= MAXPATHLEN) {
efree(opened_path);
free(new_state.cwd);
return -1;
}
#ifdef PHP_WIN32
if (GetTempFileName(new_state.cwd, pfx, 0, opened_path)) {
/* Some versions of windows set the temp file to be read-only,
* which means that opening it will fail... */
if (VCWD_CHMOD(opened_path, 0600)) {
efree(opened_path);
free(new_state.cwd);
return -1;
}
fd = VCWD_OPEN_MODE(opened_path, open_flags, 0600);
}
#elif defined(HAVE_MKSTEMP)
fd = mkstemp(opened_path);
#else
if (mktemp(opened_path)) {
fd = VCWD_OPEN(opened_path, open_flags);
}
#endif
if (fd == -1 || !opened_path_p) {
efree(opened_path);
} else {
*opened_path_p = opened_path;
}
free(new_state.cwd);
return fd;
}
/* }}} */
/* Cache the chosen temporary directory. */
static char* temporary_directory;
PHPAPI void php_shutdown_temporary_directory(void)
{
if (temporary_directory) {
free(temporary_directory);
temporary_directory = NULL;
}
}
/*
* Determine where to place temporary files.
*/
PHPAPI const char* php_get_temporary_directory(void)
{
/* Did we determine the temporary directory already? */
if (temporary_directory) {
return temporary_directory;
}
#ifdef PHP_WIN32
/* We can't count on the environment variables TEMP or TMP,
* and so must make the Win32 API call to get the default
* directory for temporary files. Note this call checks
* the environment values TMP and TEMP (in order) first.
*/
{
char sTemp[MAX_PATH];
DWORD len = GetTempPath(sizeof(sTemp),sTemp);
assert(0 < len); /* should *never* fail! */
if (sTemp[len - 1] == DEFAULT_SLASH) {
temporary_directory = zend_strndup(sTemp, len - 1);
} else {
temporary_directory = zend_strndup(sTemp, len);
}
return temporary_directory;
}
#else
/* On Unix use the (usual) TMPDIR environment variable. */
{
char* s = getenv("TMPDIR");
if (s && *s) {
int len = strlen(s);
if (s[len - 1] == DEFAULT_SLASH) {
temporary_directory = zend_strndup(s, len - 1);
} else {
temporary_directory = zend_strndup(s, len);
}
return temporary_directory;
}
}
#ifdef P_tmpdir
/* Use the standard default temporary directory. */
if (P_tmpdir) {
temporary_directory = strdup(P_tmpdir);
return temporary_directory;
}
#endif
/* Shouldn't ever(!) end up here ... last ditch default. */
temporary_directory = strdup("/tmp");
return temporary_directory;
#endif
}
/* {{{ php_open_temporary_file
*
* Unlike tempnam(), the supplied dir argument takes precedence
* over the TMPDIR environment variable
* This function should do its best to return a file pointer to a newly created
* unique file, on every platform.
*/
PHPAPI int php_open_temporary_fd_ex(const char *dir, const char *pfx, char **opened_path_p, zend_bool open_basedir_check TSRMLS_DC)
{
int fd;
const char *temp_dir;
if (!pfx) {
pfx = "tmp.";
}
if (opened_path_p) {
*opened_path_p = NULL;
}
if (!dir || *dir == '\0') {
def_tmp:
temp_dir = php_get_temporary_directory();
if (temp_dir && *temp_dir != '\0' && (!open_basedir_check || !php_check_open_basedir(temp_dir TSRMLS_CC))) {
return php_do_open_temporary_file(temp_dir, pfx, opened_path_p TSRMLS_CC);
} else {
return -1;
}
}
/* Try the directory given as parameter. */
fd = php_do_open_temporary_file(dir, pfx, opened_path_p TSRMLS_CC);
if (fd == -1) {
/* Use default temporary directory. */
goto def_tmp;
}
return fd;
}
PHPAPI int php_open_temporary_fd(const char *dir, const char *pfx, char **opened_path_p TSRMLS_DC)
{
return php_open_temporary_fd_ex(dir, pfx, opened_path_p, 0 TSRMLS_CC);
}
PHPAPI FILE *php_open_temporary_file(const char *dir, const char *pfx, char **opened_path_p TSRMLS_DC)
{
FILE *fp;
int fd = php_open_temporary_fd(dir, pfx, opened_path_p TSRMLS_CC);
if (fd == -1) {
return NULL;
}
fp = fdopen(fd, "r+b");
if (fp == NULL) {
close(fd);
}
return fp;
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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