1: /*
2: +----------------------------------------------------------------------+
3: | PHP Version 5 |
4: +----------------------------------------------------------------------+
5: | Copyright (c) 1997-2014 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: |
16: +----------------------------------------------------------------------+
17: */
18:
19: /* $Id: link.c,v 1.1.1.4 2014/06/15 20:03:57 misho Exp $ */
20:
21: #include "php.h"
22: #include "php_filestat.h"
23: #include "php_globals.h"
24:
25: #ifdef HAVE_SYMLINK
26:
27: #include <stdlib.h>
28: #if HAVE_UNISTD_H
29: #include <unistd.h>
30: #endif
31: #include <sys/stat.h>
32: #include <string.h>
33: #if HAVE_PWD_H
34: #ifdef PHP_WIN32
35: #include "win32/pwd.h"
36: #else
37: #include <pwd.h>
38: #endif
39: #endif
40: #if HAVE_GRP_H
41: #ifdef PHP_WIN32
42: #include "win32/grp.h"
43: #else
44: #include <grp.h>
45: #endif
46: #endif
47: #include <errno.h>
48: #include <ctype.h>
49:
50: #include "php_link.h"
51: #include "php_string.h"
52:
53: /* {{{ proto string readlink(string filename)
54: Return the target of a symbolic link */
55: PHP_FUNCTION(readlink)
56: {
57: char *link;
58: int link_len;
59: char buff[MAXPATHLEN];
60: int ret;
61:
62: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &link, &link_len) == FAILURE) {
63: return;
64: }
65:
66: if (php_check_open_basedir(link TSRMLS_CC)) {
67: RETURN_FALSE;
68: }
69:
70: ret = php_sys_readlink(link, buff, MAXPATHLEN-1);
71:
72: if (ret == -1) {
73: php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
74: RETURN_FALSE;
75: }
76: /* Append NULL to the end of the string */
77: buff[ret] = '\0';
78:
79: RETURN_STRING(buff, 1);
80: }
81: /* }}} */
82:
83: /* {{{ proto int linkinfo(string filename)
84: Returns the st_dev field of the UNIX C stat structure describing the link */
85: PHP_FUNCTION(linkinfo)
86: {
87: char *link;
88: char *dirname;
89: int link_len, dir_len;
90: struct stat sb;
91: int ret;
92:
93: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "p", &link, &link_len) == FAILURE) {
94: return;
95: }
96:
97: dirname = estrndup(link, link_len);
98: dir_len = php_dirname(dirname, link_len);
99:
100: if (php_check_open_basedir(dirname TSRMLS_CC)) {
101: efree(dirname);
102: RETURN_FALSE;
103: }
104:
105: ret = VCWD_LSTAT(link, &sb);
106: if (ret == -1) {
107: php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
108: efree(dirname);
109: RETURN_LONG(-1L);
110: }
111:
112: efree(dirname);
113: RETURN_LONG((long) sb.st_dev);
114: }
115: /* }}} */
116:
117: /* {{{ proto int symlink(string target, string link)
118: Create a symbolic link */
119: PHP_FUNCTION(symlink)
120: {
121: char *topath, *frompath;
122: int topath_len, frompath_len;
123: int ret;
124: char source_p[MAXPATHLEN];
125: char dest_p[MAXPATHLEN];
126: char dirname[MAXPATHLEN];
127: size_t len;
128:
129: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "pp", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
130: return;
131: }
132:
133: if (!expand_filepath(frompath, source_p TSRMLS_CC)) {
134: php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
135: RETURN_FALSE;
136: }
137:
138: memcpy(dirname, source_p, sizeof(source_p));
139: len = php_dirname(dirname, strlen(dirname));
140:
141: if (!expand_filepath_ex(topath, dest_p, dirname, len TSRMLS_CC)) {
142: php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
143: RETURN_FALSE;
144: }
145:
146: if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ||
147: php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) )
148: {
149: php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to symlink to a URL");
150: RETURN_FALSE;
151: }
152:
153: if (php_check_open_basedir(dest_p TSRMLS_CC)) {
154: RETURN_FALSE;
155: }
156:
157: if (php_check_open_basedir(source_p TSRMLS_CC)) {
158: RETURN_FALSE;
159: }
160:
161: /* For the source, an expanded path must be used (in ZTS an other thread could have changed the CWD).
162: * For the target the exact string given by the user must be used, relative or not, existing or not.
163: * The target is relative to the link itself, not to the CWD. */
164: ret = symlink(topath, source_p);
165:
166: if (ret == -1) {
167: php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
168: RETURN_FALSE;
169: }
170:
171: RETURN_TRUE;
172: }
173: /* }}} */
174:
175: /* {{{ proto int link(string target, string link)
176: Create a hard link */
177: PHP_FUNCTION(link)
178: {
179: char *topath, *frompath;
180: int topath_len, frompath_len;
181: int ret;
182: char source_p[MAXPATHLEN];
183: char dest_p[MAXPATHLEN];
184:
185: if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "pp", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
186: return;
187: }
188:
189: if (!expand_filepath(frompath, source_p TSRMLS_CC) || !expand_filepath(topath, dest_p TSRMLS_CC)) {
190: php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
191: RETURN_FALSE;
192: }
193:
194: if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ||
195: php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) )
196: {
197: php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to link to a URL");
198: RETURN_FALSE;
199: }
200:
201: if (php_check_open_basedir(dest_p TSRMLS_CC)) {
202: RETURN_FALSE;
203: }
204:
205: if (php_check_open_basedir(source_p TSRMLS_CC)) {
206: RETURN_FALSE;
207: }
208:
209: #ifndef ZTS
210: ret = link(topath, frompath);
211: #else
212: ret = link(dest_p, source_p);
213: #endif
214: if (ret == -1) {
215: php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
216: RETURN_FALSE;
217: }
218:
219: RETURN_TRUE;
220: }
221: /* }}} */
222:
223: #endif
224:
225: /*
226: * Local variables:
227: * tab-width: 4
228: * c-basic-offset: 4
229: * End:
230: * vim600: noet sw=4 ts=4 fdm=marker
231: * vim<600: noet sw=4 ts=4
232: */
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