1 : /*
2 : +----------------------------------------------------------------------+
3 : | PHP Version 5 |
4 : +----------------------------------------------------------------------+
5 : | Copyright (c) 1997-2009 The PHP Group |
6 : +----------------------------------------------------------------------+
7 : | This source file is subject to version 3.01 of the PHP license, |
8 : | that is bundled with this package in the file LICENSE, and is |
9 : | available through the world-wide-web at the following url: |
10 : | http://www.php.net/license/3_01.txt |
11 : | If you did not receive a copy of the PHP license and are unable to |
12 : | obtain it through the world-wide-web, please send a note to |
13 : | license@php.net so we can mail you a copy immediately. |
14 : +----------------------------------------------------------------------+
15 : | Author: Zeev Suraski <zeev@zend.com> |
16 : +----------------------------------------------------------------------+
17 : */
18 :
19 : /* $Id: php_open_temporary_file.c 282742 2009-06-25 01:35:05Z iliaa $ */
20 :
21 : #include "php.h"
22 :
23 : #include <errno.h>
24 : #include <sys/types.h>
25 : #include <sys/stat.h>
26 : #include <fcntl.h>
27 :
28 : #ifdef PHP_WIN32
29 : #define O_RDONLY _O_RDONLY
30 : #include "win32/param.h"
31 : #include "win32/winutil.h"
32 : #elif defined(NETWARE)
33 : #ifdef USE_WINSOCK
34 : #include <novsock2.h>
35 : #else
36 : #include <sys/socket.h>
37 : #endif
38 : #include <sys/param.h>
39 : #else
40 : #include <sys/param.h>
41 : #include <sys/socket.h>
42 : #include <netinet/in.h>
43 : #include <netdb.h>
44 : #if HAVE_ARPA_INET_H
45 : #include <arpa/inet.h>
46 : #endif
47 : #endif
48 : #ifdef HAVE_SYS_TIME_H
49 : #include <sys/time.h>
50 : #endif
51 :
52 : #ifdef HAVE_SYS_FILE_H
53 : #include <sys/file.h>
54 : #endif
55 :
56 : #if !defined(P_tmpdir)
57 : #define P_tmpdir ""
58 : #endif
59 :
60 : /* {{{ php_do_open_temporary_file */
61 :
62 : /* Loosely based on a tempnam() implementation by UCLA */
63 :
64 : /*
65 : * Copyright (c) 1988, 1993
66 : * The Regents of the University of California. All rights reserved.
67 : *
68 : * Redistribution and use in source and binary forms, with or without
69 : * modification, are permitted provided that the following conditions
70 : * are met:
71 : * 1. Redistributions of source code must retain the above copyright
72 : * notice, this list of conditions and the following disclaimer.
73 : * 2. Redistributions in binary form must reproduce the above copyright
74 : * notice, this list of conditions and the following disclaimer in the
75 : * documentation and/or other materials provided with the distribution.
76 : * 3. All advertising materials mentioning features or use of this software
77 : * must display the following acknowledgement:
78 : * This product includes software developed by the University of
79 : * California, Berkeley and its contributors.
80 : * 4. Neither the name of the University nor the names of its contributors
81 : * may be used to endorse or promote products derived from this software
82 : * without specific prior written permission.
83 : *
84 : * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
85 : * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
86 : * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
87 : * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
88 : * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
89 : * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
90 : * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
91 : * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
92 : * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
93 : * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
94 : * SUCH DAMAGE.
95 : */
96 :
97 : static int php_do_open_temporary_file(const char *path, const char *pfx, char **opened_path_p TSRMLS_DC)
98 1147 : {
99 : char *trailing_slash;
100 : char *opened_path;
101 : char cwd[MAXPATHLEN];
102 : cwd_state new_state;
103 1147 : int fd = -1;
104 : #ifndef HAVE_MKSTEMP
105 : int open_flags = O_CREAT | O_TRUNC | O_RDWR
106 : #ifdef PHP_WIN32
107 : | _O_BINARY
108 : #endif
109 : ;
110 : #endif
111 :
112 1147 : if (!path || !path[0]) {
113 0 : return -1;
114 : }
115 :
116 1147 : if (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
117 0 : cwd[0] = '\0';
118 : }
119 :
120 1147 : new_state.cwd = strdup(cwd);
121 1147 : new_state.cwd_length = strlen(cwd);
122 :
123 1147 : if (virtual_file_ex(&new_state, path, NULL, CWD_REALPATH)) {
124 10 : free(new_state.cwd);
125 10 : return -1;
126 : }
127 :
128 1137 : if (IS_SLASH(new_state.cwd[new_state.cwd_length - 1])) {
129 0 : trailing_slash = "";
130 : } else {
131 1137 : trailing_slash = "/";
132 : }
133 :
134 1137 : if (spprintf(&opened_path, 0, "%s%s%sXXXXXX", new_state.cwd, trailing_slash, pfx) >= MAXPATHLEN) {
135 0 : efree(opened_path);
136 0 : free(new_state.cwd);
137 0 : return -1;
138 : }
139 :
140 : #ifdef PHP_WIN32
141 : if (GetTempFileName(new_state.cwd, pfx, 0, opened_path)) {
142 : /* Some versions of windows set the temp file to be read-only,
143 : * which means that opening it will fail... */
144 : VCWD_CHMOD(opened_path, 0600);
145 : fd = VCWD_OPEN_MODE(opened_path, open_flags, 0600);
146 : }
147 : #elif defined(HAVE_MKSTEMP)
148 1137 : fd = mkstemp(opened_path);
149 : #else
150 : if (mktemp(opened_path)) {
151 : fd = VCWD_OPEN(opened_path, open_flags);
152 : }
153 : #endif
154 1521 : if (fd == -1 || !opened_path_p) {
155 384 : efree(opened_path);
156 : } else {
157 753 : *opened_path_p = opened_path;
158 : }
159 1137 : free(new_state.cwd);
160 1137 : return fd;
161 : }
162 : /* }}} */
163 :
164 : /* Cache the chosen temporary directory. */
165 : static char* temporary_directory;
166 :
167 : PHPAPI void php_shutdown_temporary_directory(void)
168 13597 : {
169 13597 : if (temporary_directory) {
170 199 : free(temporary_directory);
171 199 : temporary_directory = NULL;
172 : }
173 13597 : }
174 :
175 : /*
176 : * Determine where to place temporary files.
177 : */
178 : PHPAPI const char* php_get_temporary_directory(void)
179 1328 : {
180 : /* Did we determine the temporary directory already? */
181 1328 : if (temporary_directory) {
182 1129 : return temporary_directory;
183 : }
184 :
185 : #ifdef PHP_WIN32
186 : /* We can't count on the environment variables TEMP or TMP,
187 : * and so must make the Win32 API call to get the default
188 : * directory for temporary files. Note this call checks
189 : * the environment values TMP and TEMP (in order) first.
190 : */
191 : {
192 : char sTemp[MAX_PATH];
193 : DWORD n = GetTempPath(sizeof(sTemp),sTemp);
194 : assert(0 < n); /* should *never* fail! */
195 : temporary_directory = strdup(sTemp);
196 : return temporary_directory;
197 : }
198 : #else
199 : /* On Unix use the (usual) TMPDIR environment variable. */
200 : {
201 199 : char* s = getenv("TMPDIR");
202 199 : if (s && *s) {
203 0 : int len = strlen(s);
204 :
205 0 : if (s[len - 1] == DEFAULT_SLASH) {
206 0 : temporary_directory = zend_strndup(s, len - 1);
207 : } else {
208 0 : temporary_directory = zend_strndup(s, len);
209 : }
210 :
211 0 : return temporary_directory;
212 : }
213 : }
214 : #ifdef P_tmpdir
215 : /* Use the standard default temporary directory. */
216 : if (P_tmpdir) {
217 199 : temporary_directory = strdup(P_tmpdir);
218 199 : return temporary_directory;
219 : }
220 : #endif
221 : /* Shouldn't ever(!) end up here ... last ditch default. */
222 : temporary_directory = strdup("/tmp");
223 : return temporary_directory;
224 : #endif
225 : }
226 :
227 : /* {{{ php_open_temporary_file
228 : *
229 : * Unlike tempnam(), the supplied dir argument takes precedence
230 : * over the TMPDIR environment variable
231 : * This function should do its best to return a file pointer to a newly created
232 : * unique file, on every platform.
233 : */
234 : PHPAPI int php_open_temporary_fd_ex(const char *dir, const char *pfx, char **opened_path_p, zend_bool open_basedir_check TSRMLS_DC)
235 753 : {
236 : int fd;
237 : const char *temp_dir;
238 :
239 753 : if (!pfx) {
240 1 : pfx = "tmp.";
241 : }
242 753 : if (opened_path_p) {
243 753 : *opened_path_p = NULL;
244 : }
245 :
246 753 : if (!dir || *dir == '\0') {
247 478 : def_tmp:
248 478 : temp_dir = php_get_temporary_directory();
249 :
250 478 : if (temp_dir && *temp_dir != '\0' && (!open_basedir_check || !php_check_open_basedir(temp_dir TSRMLS_CC))) {
251 478 : return php_do_open_temporary_file(temp_dir, pfx, opened_path_p TSRMLS_CC);
252 : } else {
253 0 : return -1;
254 : }
255 : }
256 :
257 : /* Try the directory given as parameter. */
258 669 : fd = php_do_open_temporary_file(dir, pfx, opened_path_p TSRMLS_CC);
259 669 : if (fd == -1) {
260 : /* Use default temporary directory. */
261 394 : goto def_tmp;
262 : }
263 275 : return fd;
264 : }
265 :
266 : PHPAPI int php_open_temporary_fd(const char *dir, const char *pfx, char **opened_path_p TSRMLS_DC)
267 747 : {
268 747 : return php_open_temporary_fd_ex(dir, pfx, opened_path_p, 0 TSRMLS_CC);
269 : }
270 :
271 : PHPAPI FILE *php_open_temporary_file(const char *dir, const char *pfx, char **opened_path_p TSRMLS_DC)
272 1 : {
273 : FILE *fp;
274 1 : int fd = php_open_temporary_fd(dir, pfx, opened_path_p TSRMLS_CC);
275 :
276 1 : if (fd == -1) {
277 0 : return NULL;
278 : }
279 :
280 1 : fp = fdopen(fd, "r+b");
281 1 : if (fp == NULL) {
282 0 : close(fd);
283 : }
284 :
285 1 : return fp;
286 : }
287 : /* }}} */
288 :
289 : /*
290 : * Local variables:
291 : * tab-width: 4
292 : * c-basic-offset: 4
293 : * End:
294 : * vim600: sw=4 ts=4 fdm=marker
295 : * vim<600: sw=4 ts=4
296 : */
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