- symlink, hardlink & co support (2/2)

1 files changed, 297 insertions, 0 deletions

diff --git a/ext/standard/link_win32.c b/ext/standard/link_win32.c
new file mode 100644
index 0000000000..493bc866c9
--- /dev/null
+++ b/ext/standard/link_win32.c
@@ -0,0 +1,297 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 5                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2009 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: Pierre A. Joye <pierre@php.net>                              |
+   +----------------------------------------------------------------------+
+ */
+
+/* $Id$ */
+#ifdef PHP_WIN32
+
+#include "php.h"
+#include "php_filestat.h"
+#include "php_globals.h"
+
+#include <WinBase.h>
+
+#include <stdlib.h>
+
+#include <string.h>
+#if HAVE_PWD_H
+#include "win32/pwd.h"
+#endif
+
+#if HAVE_GRP_H
+#include "win32/grp.h"
+#endif
+
+#include <errno.h>
+#include <ctype.h>
+
+#include "safe_mode.h"
+#include "php_link.h"
+#include "php_string.h"
+
+/*
+TODO:
+- Create php_readlink, php_link and php_symlink in win32/link.c
+- Expose them (PHPAPI) so extensions developers can use them
+- define link/readlink/symlink to their php_ equivalent and use them in ext/standart/link.c
+- this file is then useless and we have a portable link API
+*/
+
+/* {{{ proto string readlink(string filename)
+   Return the target of a symbolic link */
+PHP_FUNCTION(readlink)
+{
+	HINSTANCE kernel32;
+	char *link;
+	int link_len;
+	TCHAR Path[MAXPATHLEN];
+	HANDLE hFile;
+	DWORD dwRet;
+
+	typedef BOOL (WINAPI *gfpnh_func)(HANDLE, LPTSTR, DWORD, DWORD);
+	gfpnh_func pGetFinalPathNameByHandle;
+
+	kernel32 = LoadLibrary("kernel32.dll");
+
+	if (kernel32) {
+		pGetFinalPathNameByHandle = (gfpnh_func)GetProcAddress(kernel32, "GetFinalPathNameByHandleA");
+		if (pGetFinalPathNameByHandle == NULL) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call GetFinalPathNameByHandleA");
+			RETURN_FALSE;
+		}
+	} else {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call get a handle on kernel32.dll");
+		RETURN_FALSE;
+	}
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &link, &link_len) == FAILURE) {
+		return;
+	}
+
+	if (PG(safe_mode) && !php_checkuid(link, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
+		RETURN_FALSE;
+	}
+
+	if (php_check_open_basedir(link TSRMLS_CC)) {
+		RETURN_FALSE;
+	}
+
+	hFile = CreateFile(link,                  // file to open
+										 GENERIC_READ,          // open for reading
+										 FILE_SHARE_READ,       // share for reading
+										 NULL,                  // default security
+										 OPEN_EXISTING,         // existing file only
+										 FILE_FLAG_BACKUP_SEMANTICS, // normal file
+										 NULL);                 // no attr. template
+
+	if( hFile == INVALID_HANDLE_VALUE) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not open file (error %d)", GetLastError());
+			RETURN_FALSE;
+	}
+
+	dwRet = pGetFinalPathNameByHandle(hFile, Path, MAXPATHLEN, VOLUME_NAME_NT);
+	if(dwRet >= MAXPATHLEN) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't resolve the full path, the path exceeds the MAX_PATH_LEN (%d) limit", MAXPATHLEN);
+		RETURN_FALSE;
+	}
+
+	CloseHandle(hFile);
+
+	/* Append NULL to the end of the string */
+	Path[dwRet] = '\0';
+
+	RETURN_STRING(Path, 1);
+}
+/* }}} */
+
+/* {{{ proto int linkinfo(string filename)
+   Returns the st_dev field of the UNIX C stat structure describing the link */
+PHP_FUNCTION(linkinfo)
+{
+	char *link;
+	int link_len;
+	struct stat sb;
+	int ret;
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &link, &link_len) == FAILURE) {
+		return;
+	}
+
+	ret = VCWD_STAT(link, &sb);
+	if (ret == -1) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
+		RETURN_LONG(-1L);
+	}
+
+	RETURN_LONG((long) sb.st_dev);
+}
+/* }}} */
+
+/* {{{ proto int symlink(string target, string link)
+   Create a symbolic link */
+PHP_FUNCTION(symlink)
+{
+	char *topath, *frompath;
+	int topath_len, frompath_len;
+	BOOLEAN ret;
+	char source_p[MAXPATHLEN];
+	char dest_p[MAXPATHLEN];
+	char dirname[MAXPATHLEN];
+	size_t len;
+	DWORD attr;
+	HINSTANCE kernel32;
+	typedef BOOLEAN (WINAPI *csla_func)( __in LPCSTR, __in LPCSTR, __in DWORD);
+	csla_func pCreateSymbolicLinkA;
+
+	kernel32 = LoadLibrary("kernel32.dll");
+
+	if (kernel32) {
+		pCreateSymbolicLinkA = (csla_func)GetProcAddress(kernel32, "CreateSymbolicLinkA");
+		if (pCreateSymbolicLinkA == NULL) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call CreateSymbolicLinkA");
+			RETURN_FALSE;
+		}
+	} else {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Can't call get a handle on kernel32.dll");
+		RETURN_FALSE;
+	}
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
+		return;
+	}
+	
+	if (!expand_filepath(frompath, source_p TSRMLS_CC)) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
+		RETURN_FALSE;
+	}
+
+	memcpy(dirname, source_p, sizeof(source_p));
+	len = php_dirname(dirname, strlen(dirname));
+
+	if (!expand_filepath_ex(topath, dest_p, dirname, len TSRMLS_CC)) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
+		RETURN_FALSE;
+	}
+
+	if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ||
+		php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ) 
+	{
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to symlink to a URL");
+		RETURN_FALSE;
+	}
+
+	if (PG(safe_mode) && !php_checkuid(dest_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
+		RETURN_FALSE;
+	}
+
+	if (PG(safe_mode) && !php_checkuid(source_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
+		RETURN_FALSE;
+	}
+
+	if (php_check_open_basedir(dest_p TSRMLS_CC)) {
+		RETURN_FALSE;
+	}
+
+	if (php_check_open_basedir(source_p TSRMLS_CC)) {
+		RETURN_FALSE;
+	}
+
+	if ((attr = GetFileAttributes(topath)) == INVALID_FILE_ATTRIBUTES) {
+			php_error_docref(NULL TSRMLS_CC, E_WARNING, "Could not fetch file information(error %d)", GetLastError());
+			RETURN_FALSE;
+	}
+
+	/* For the source, an expanded path must be used (in ZTS an other thread could have changed the CWD).
+	 * For the target the exact string given by the user must be used, relative or not, existing or not.
+	 * The target is relative to the link itself, not to the CWD. */
+	ret = pCreateSymbolicLinkA(source_p, topath, (attr & FILE_ATTRIBUTE_DIRECTORY ? 1 : 0));
+
+	if (!ret) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cannot create symlink, error code(%d)", GetLastError());
+		RETURN_FALSE;
+	}
+
+	RETURN_TRUE;
+}
+/* }}} */
+
+/* {{{ proto int link(string target, string link)
+   Create a hard link */
+PHP_FUNCTION(link)
+{
+	char *topath, *frompath;
+	int topath_len, frompath_len;
+	int ret;
+	char source_p[MAXPATHLEN];
+	char dest_p[MAXPATHLEN];
+
+	if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ss", &topath, &topath_len, &frompath, &frompath_len) == FAILURE) {
+		return;
+	}
+
+	if (!expand_filepath(frompath, source_p TSRMLS_CC) || !expand_filepath(topath, dest_p TSRMLS_CC)) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "No such file or directory");
+		RETURN_FALSE;
+	}
+
+	if (php_stream_locate_url_wrapper(source_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ||
+		php_stream_locate_url_wrapper(dest_p, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC) ) 
+	{
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to link to a URL");
+		RETURN_FALSE;
+	}
+
+	if (PG(safe_mode) && !php_checkuid(dest_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
+		RETURN_FALSE;
+	}
+
+	if (PG(safe_mode) && !php_checkuid(source_p, NULL, CHECKUID_CHECK_FILE_AND_DIR)) {
+		RETURN_FALSE;
+	}
+
+	if (php_check_open_basedir(dest_p TSRMLS_CC)) {
+		RETURN_FALSE;
+	}
+
+	if (php_check_open_basedir(source_p TSRMLS_CC)) {
+		RETURN_FALSE;
+	}
+
+#ifndef ZTS
+	ret = CreateHardLinkA(topath, frompath, NULL);
+#else 
+	ret = CreateHardLinkA(dest_p, source_p, NULL);	
+#endif	
+	if (ret == -1) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "%s", strerror(errno));
+		RETURN_FALSE;
+	}
+
+	RETURN_TRUE;
+}
+/* }}} */
+
+#endif
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: noet sw=4 ts=4 fdm=marker
+ * vim<600: noet sw=4 ts=4
+ */