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/*
+----------------------------------------------------------------------+
| PHP Version 4 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2002 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 2.02 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available at through the world-wide-web at |
| http://www.php.net/license/2_02.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> |
+----------------------------------------------------------------------+
*/

#include "php.h"

#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifdef PHP_WIN32
#include <windows.h>
#include <winsock.h>
#define O_RDONLY _O_RDONLY
#include "win32/param.h"
#include "win32/winutil.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 FILE *php_do_open_temporary_file(const char *path, const char *pfx, char **opened_path_p TSRMLS_DC)
{
char *trailing_slash;
FILE *fp;
char *opened_path;
#ifndef PHP_WIN32
int fd;
#endif

if (!path) {
return NULL;
}

if (!(opened_path = emalloc(MAXPATHLEN))) {
return NULL;
}

if (path[strlen(path)-1] == '/') {
trailing_slash = "";
} else {
trailing_slash = "/";
}

(void)snprintf(opened_path, MAXPATHLEN, "%s%s%sXXXXXX", path, trailing_slash, pfx);

#ifdef PHP_WIN32
if (GetTempFileName(path, pfx, 0, opened_path)) {
fp = VCWD_FOPEN(opened_path, "wb");
} else {
fp = NULL;
}
#elif defined(HAVE_MKSTEMP)
fd = mkstemp(opened_path);
if (fd==-1) {
fp = NULL;
} else {
fp = fdopen(fd, "wb");
}
#else
if (mktemp(opened_path)) {
fp = VCWD_FOPEN(opened_path, "wb");
} else {
fp = NULL;
}
#endif
if (!fp || !opened_path_p) {
efree(opened_path);
} else {
*opened_path_p = opened_path;
}
return fp;
}
/* }}} */

/*
* Determine where to place temporary files.
*/
const char* get_temporary_directory()
{
/* Cache the chosen temporary directory. */
static char* temporary_directory;

/* 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 n = GetTempPath(sizeof(sTemp),sTemp);
assert(0 < n); /* should *never* fail! */
temporary_directory = strdup(sTemp);
return temporary_directory;
}
#else
/* On Unix use the (usual) TMPDIR environment variable. */
{
char* s = getenv("TMPDIR");
if (s) {
temporary_directory = strdup(s);
return temporary_directory;
}
}
#ifdef P_tmpdir
/* Use the standard default temporary directory. */
if (P_tmpdir) {
temporary_directory = P_tmpdir;
return temporary_directory;
}
#endif
/* Shouldn't ever(!) end up here ... last ditch default. */
temporary_directory = "/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 FILE *php_open_temporary_file(const char *dir, const char *pfx, char **opened_path_p TSRMLS_DC)
{
FILE* fp = 0;

if (!pfx) {
pfx = "tmp.";
}
if (opened_path_p) {
*opened_path_p = NULL;
}

/* Try the directory given as parameter. */
fp = php_do_open_temporary_file(dir, pfx, opened_path_p TSRMLS_CC);
if (fp) {
return fp;
}

/* Use default temporary directory. */
fp = php_do_open_temporary_file(get_temporary_directory(), pfx, opened_path_p TSRMLS_CC);
if (fp) {
return fp;
}

return 0;
}
/* }}} */

/*
* 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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