- Move virtual cwd to TSRM.

  In the least this still doesn't work on Windows.

6 files changed, 992 insertions, 1 deletions

diff --git a/TSRM/Makefile.am b/TSRM/Makefile.am
index da71044bed..91e585b65c 100644
--- a/TSRM/Makefile.am
+++ b/TSRM/Makefile.am
@@ -1,6 +1,6 @@
 ## process this file with automake to produce Makefile.am
 AUTOMAKE_OPTIONS=foreign
 noinst_LTLIBRARIES=libtsrm.la
-libtsrm_la_SOURCES = TSRM.c
+libtsrm_la_SOURCES = TSRM.c tsrm_strtok_r.c tsrm_virtual_cwd.c
 
 depend:
diff --git a/TSRM/configure.in b/TSRM/configure.in
index 36293b8917..2b4f81908b 100644
--- a/TSRM/configure.in
+++ b/TSRM/configure.in
@@ -19,6 +19,12 @@ fi
 
 dnl TSRM_PTHREAD
 
+AC_CHECK_HEADERS(
+utime.h \
+dirent.h \
+stdarg.h
+)
+
 AC_DEFINE(ZTS,1,[ ])
 
 AC_OUTPUT(Makefile)
diff --git a/TSRM/tsrm_strtok_r.c b/TSRM/tsrm_strtok_r.c
new file mode 100644
index 0000000000..509f563ec0
--- /dev/null
+++ b/TSRM/tsrm_strtok_r.c
@@ -0,0 +1,62 @@
+#include "tsrm_strtok_r.h"
+
+#include <stdio.h>
+
+static inline int in_character_class(char ch, const char *delim)
+{
+	while (*delim) {
+		if (*delim == ch) {
+			return 1;
+		}
+		delim++;
+	}
+	return 0;
+}
+
+char *tsrm_strtok_r(char *s, const char *delim, char **last)
+{
+	char *token;
+
+	if (s == NULL) {
+		s = *last;
+	}
+
+	while (*s && in_character_class(*s, delim)) {
+		s++;
+	}
+	if (!*s) {
+		return NULL;
+	}
+
+	token = s;
+
+	while (*s && !in_character_class(*s, delim)) {
+		s++;
+	}
+	if (!*s) {
+		*last = s;
+	} else {
+		*s = '\0';
+		*last = s + 1;
+	}
+	return token;
+}
+
+#if 0
+
+main()
+{
+	char foo[] = "/foo/bar//\\barbara";
+	char *last;
+	char *token;
+
+	token = tsrm_strtok_r(foo, "/\\", &last);
+	while (token) {
+		printf ("Token = '%s'\n", token);
+		token = tsrm_strtok_r(NULL, "/\\", &last);
+	}
+	
+	return 0;
+}
+
+#endif
diff --git a/TSRM/tsrm_strtok_r.h b/TSRM/tsrm_strtok_r.h
new file mode 100644
index 0000000000..8c9e8198e7
--- /dev/null
+++ b/TSRM/tsrm_strtok_r.h
@@ -0,0 +1,6 @@
+#ifndef TSRM_STRTOK_R
+#define TSRM_STRTOK_R
+
+char *tsrm_strtok_r(char *s, const char *delim, char **last);
+
+#endif
diff --git a/TSRM/tsrm_virtual_cwd.c b/TSRM/tsrm_virtual_cwd.c
new file mode 100644
index 0000000000..48b566af94
--- /dev/null
+++ b/TSRM/tsrm_virtual_cwd.c
@@ -0,0 +1,772 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP version 4.0                                                      |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997, 1998, 1999, 2000 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.               |
+   +----------------------------------------------------------------------+
+   | Authors: Andi Gutmans <andi@zend.com>                                |
+   |          Sascha Schumann <sascha@schumann.cx>                        |
+   +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <stdio.h>
+#include <limits.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <fcntl.h>
+
+#include "tsrm_config.h"
+#include "tsrm_strtok_r.h"
+#include "tsrm_virtual_cwd.h"
+
+/* Are we doing enough to detect this? */
+#ifndef MAXPATHLEN
+#define MAXPATHLEN 256
+#endif
+
+#ifndef do_alloca
+# if (HAVE_ALLOCA || (defined (__GNUC__) && __GNUC__ >= 2)) && !(defined(ZTS) && defined(TSRM_WIN32))
+#  define do_alloca(p) alloca(p)
+#  define free_alloca(p)
+# else
+#  define do_alloca(p)       emalloc(p)
+#  define free_alloca(p) efree(p)
+# endif
+#endif
+
+#ifdef TSRM_WIN32
+/* mode_t isn't defined on Windows */
+typedef int mode_t;
+#include <sys/utime.h>
+#endif
+
+#define VIRTUAL_CWD_DEBUG 0
+
+#ifdef ZTS
+#include "TSRM.h"
+#endif
+
+/* Only need mutex for popen() in Windows because it doesn't chdir() on UNIX */
+#if defined(TSRM_WIN32) && defined(ZTS)
+MUTEX_T cwd_mutex;
+#endif
+
+#ifdef ZTS
+static ts_rsrc_id cwd_globals_id;
+#else
+static virtual_cwd_globals cwd_globals;
+#endif
+
+cwd_state main_cwd_state; /* True global */
+
+#ifndef TSRM_WIN32
+#include <unistd.h>
+#else
+#include <direct.h>
+#endif
+
+#ifndef S_ISDIR
+#define S_ISDIR(mode) ((mode) & _S_IFDIR)
+#endif
+
+#ifndef S_ISREG
+#define S_ISREG(mode) ((mode) & _S_IFREG)
+#endif
+
+#ifdef TSRM_WIN32
+#define tsrm_strtok_r(a,b,c) strtok((a),(b))
+#define DEFAULT_SLASH '\\'
+#define TOKENIZER_STRING "/\\"
+
+#define COPY_WHEN_ABSOLUTE 2
+	
+static int php_check_dots(const char *element, int n) 
+{
+	while (n-- > 0) if (element[n] != '.') break;
+
+	return (n != -1);
+}
+	
+#define IS_DIRECTORY_UP(element, len) \
+	(len >= 2 && !php_check_dots(element, len))
+
+#define IS_DIRECTORY_CURRENT(element, len) \
+	(len == 1 && ptr[0] == '.')
+
+
+#else
+#define DEFAULT_SLASH '/'
+#define TOKENIZER_STRING "/"
+#endif
+
+
+/* default macros */
+
+#ifndef IS_DIRECTORY_UP
+#define IS_DIRECTORY_UP(element, len) \
+	(len == 2 && memcmp(element, "..", 2) == 0)
+#endif
+
+#ifndef IS_DIRECTORY_CURRENT
+#define IS_DIRECTORY_CURRENT(element, len) \
+	(len == 1 && ptr[0] == '.')
+#endif
+
+#ifndef COPY_WHEN_ABSOLUTE
+#define COPY_WHEN_ABSOLUTE 0
+#endif
+
+/* define this to check semantics */
+#define IS_DIR_OK(s) (1)
+	
+#ifndef IS_DIR_OK
+#define IS_DIR_OK(state) (php_is_dir_ok(state) == 0)
+#endif
+
+
+#define CWD_STATE_COPY(d, s)				\
+	(d)->cwd_length = (s)->cwd_length;		\
+	(d)->cwd = (char *) malloc((s)->cwd_length+1);	\
+	memcpy((d)->cwd, (s)->cwd, (s)->cwd_length+1);
+
+#define CWD_STATE_FREE(s)			\
+	free((s)->cwd);
+	
+static int php_is_dir_ok(const cwd_state *state) 
+{
+	struct stat buf;
+
+	if (stat(state->cwd, &buf) == 0 && S_ISDIR(buf.st_mode))
+		return (0);
+
+	return (1);
+}
+
+static int php_is_file_ok(const cwd_state *state) 
+{
+	struct stat buf;
+
+	if (stat(state->cwd, &buf) == 0 && S_ISREG(buf.st_mode))
+		return (0);
+
+	return (1);
+}
+
+static void cwd_globals_ctor(virtual_cwd_globals *cwd_globals)
+{
+	CWD_STATE_COPY(&cwd_globals->cwd, &main_cwd_state);
+}
+
+static void cwd_globals_dtor(virtual_cwd_globals *cwd_globals)
+{
+	CWD_STATE_FREE(&cwd_globals->cwd);
+}
+
+static char *tsrm_strndup(const char *s, uint length)
+{
+    char *p;
+
+    p = (char *) malloc(length+1);
+    if (!p) {
+        return (char *)NULL;
+    }
+    if (length) {
+        memcpy(p,s,length);
+    }
+    p[length]=0;
+    return p;
+}
+
+CWD_API void virtual_cwd_startup(void)
+{
+	char cwd[MAXPATHLEN];
+	char *result;
+
+	result = getcwd(cwd, sizeof(cwd));	
+	if (!result) {
+		cwd[0] = '\0';
+	}
+	main_cwd_state.cwd = strdup(cwd);
+	main_cwd_state.cwd_length = strlen(cwd);
+
+#ifdef ZTS
+	cwd_globals_id = ts_allocate_id(sizeof(virtual_cwd_globals), (ts_allocate_ctor) cwd_globals_ctor, (ts_allocate_dtor) cwd_globals_dtor);
+#else
+	cwd_globals_ctor(&cwd_globals);
+#endif
+
+#if defined(TSRM_WIN32) && defined(ZTS)
+	cwd_mutex = tsrm_mutex_alloc();
+#endif
+}
+
+CWD_API void virtual_cwd_shutdown(void)
+{
+#ifndef ZTS
+	cwd_globals_dtor(&cwd_globals);
+#endif
+#if defined(TSRM_WIN32) && defined(ZTS)
+	tsrm_mutex_free(cwd_mutex);
+#endif
+
+	free(main_cwd_state.cwd); /* Don't use CWD_STATE_FREE because the non global states will probably use emalloc()/efree() */
+}
+
+CWD_API char *virtual_getcwd_ex(int *length)
+{
+	cwd_state *state;
+	CWDLS_FETCH();
+
+	state = &CWDG(cwd);
+
+	if (state->cwd_length == 0) {
+		char *retval;
+
+		*length = 1;
+		retval = (char *) malloc(2);
+		retval[0] = DEFAULT_SLASH;
+		retval[1] = '\0';	
+		return retval;
+	}
+
+#ifdef TSRM_WIN32
+	/* If we have something like C: */
+	if (state->cwd_length == 2 && state->cwd[state->cwd_length-1] == ':') {
+		char *retval;
+
+		*length = state->cwd_length+1;
+		retval = (char *) malloc(*length+1);
+		memcpy(retval, state->cwd, *length);
+		retval[*length-1] = DEFAULT_SLASH;
+		retval[*length] = '\0';
+		return retval;
+	}
+#endif
+	*length = state->cwd_length;
+	return strdup(state->cwd);
+}
+
+
+/* Same semantics as UNIX getcwd() */
+CWD_API char *virtual_getcwd(char *buf, size_t size)
+{
+	size_t length;
+	char *cwd;
+
+	cwd = virtual_getcwd_ex(&length);
+
+	if (buf == NULL) {
+		return cwd;
+	}
+	if (length > size-1) {
+		free(cwd);
+		errno = ERANGE; /* Is this OK? */
+		return NULL;
+	}
+	memcpy(buf, cwd, length+1);
+	free(cwd);
+	return buf;
+}
+
+/* Resolve path relatively to state and put the real path into state */
+/* returns 0 for ok, 1 for error */
+CWD_API int virtual_file_ex(cwd_state *state, const char *path, verify_path_func verify_path)
+{
+	int path_length = strlen(path);
+	char *ptr, *path_copy;
+	char *tok = NULL;
+	int ptr_length;
+	cwd_state *old_state;
+	int ret = 0;
+	int copy_amount = -1;
+	char *free_path;
+	unsigned char is_absolute = 0;
+#ifndef TSRM_WIN32
+	char resolved_path[MAXPATHLEN];
+#endif
+
+	if (path_length == 0) 
+		return (0);
+
+#ifndef TSRM_WIN32
+	if (IS_ABSOLUTE_PATH(path, path_length)) {
+		if (realpath(path, resolved_path)) {
+			path = resolved_path;
+			path_length = strlen(path);
+		}
+	} else { /* Concat current directory with relative path and then run realpath() on it */
+		char *tmp;
+		char *ptr;
+
+		ptr = tmp = (char *) malloc(state->cwd_length+path_length+sizeof("/"));
+		if (!tmp) {
+			return 1;
+		}
+		memcpy(ptr, state->cwd, state->cwd_length);
+		ptr += state->cwd_length;
+		*ptr++ = DEFAULT_SLASH;
+		memcpy(ptr, path, path_length);
+		ptr += path_length;
+		*ptr = '\0';
+		if (realpath(tmp, resolved_path)) {
+			path = resolved_path;
+			path_length = strlen(path);
+		}
+		free(tmp);
+	}
+#endif
+	free_path = path_copy = tsrm_strndup(path, path_length);
+
+	old_state = (cwd_state *) malloc(sizeof(cwd_state));
+	CWD_STATE_COPY(old_state, state);
+#if VIRTUAL_CWD_DEBUG
+	fprintf(stderr,"cwd = %s path = %s\n", state->cwd, path);
+#endif
+	if (IS_ABSOLUTE_PATH(path_copy, path_length)) {
+		copy_amount = COPY_WHEN_ABSOLUTE;
+		is_absolute = 1;
+#ifdef TSRM_WIN32
+	} else if(IS_SLASH(path_copy[0])) {
+		copy_amount = 2;
+#endif
+	}
+
+	if (copy_amount != -1) {
+		state->cwd = (char *) realloc(state->cwd, copy_amount + 1);
+		if (copy_amount) {
+			if (is_absolute) {
+				memcpy(state->cwd, path_copy, copy_amount);
+				path_copy += copy_amount;
+			} else {
+				memcpy(state->cwd, old_state->cwd, copy_amount);
+			}
+		}
+		state->cwd[copy_amount] = '\0';
+		state->cwd_length = copy_amount;
+	}
+
+
+	ptr = tsrm_strtok_r(path_copy, TOKENIZER_STRING, &tok);
+	while (ptr) {
+		ptr_length = strlen(ptr);
+
+		if (IS_DIRECTORY_UP(ptr, ptr_length)) {
+			char save;
+
+			save = DEFAULT_SLASH;
+
+#define PREVIOUS state->cwd[state->cwd_length - 1]
+
+			while (IS_ABSOLUTE_PATH(state->cwd, state->cwd_length) &&
+					!IS_SLASH(PREVIOUS)) {
+				save = PREVIOUS;
+				PREVIOUS = '\0';
+				state->cwd_length--;
+			}
+
+			if (!IS_ABSOLUTE_PATH(state->cwd, state->cwd_length)) {
+				state->cwd[state->cwd_length++] = save;
+				state->cwd[state->cwd_length] = '\0';
+			} else {
+				PREVIOUS = '\0';
+				state->cwd_length--;
+			}
+		} else if (!IS_DIRECTORY_CURRENT(ptr, ptr_length)) {
+			state->cwd = (char *) realloc(state->cwd, state->cwd_length+ptr_length+1+1);
+			state->cwd[state->cwd_length] = DEFAULT_SLASH;
+			memcpy(&state->cwd[state->cwd_length+1], ptr, ptr_length+1);
+			state->cwd_length += (ptr_length+1);
+		}
+		ptr = tsrm_strtok_r(NULL, TOKENIZER_STRING, &tok);
+	}
+
+	if (state->cwd_length == COPY_WHEN_ABSOLUTE) {
+		state->cwd = (char *) realloc(state->cwd, state->cwd_length+1+1);
+		state->cwd[state->cwd_length] = DEFAULT_SLASH;
+		state->cwd[state->cwd_length+1] = '\0';
+		state->cwd_length++;
+	}
+
+	if (verify_path && verify_path(state)) {
+		CWD_STATE_FREE(state);
+
+		*state = *old_state;
+
+		ret = 1;
+	} else {
+		CWD_STATE_FREE(old_state);
+		ret = 0;
+	}
+	
+	free(old_state);
+	
+	free(free_path);
+#if VIRTUAL_CWD_DEBUG
+	fprintf (stderr, "virtual_file_ex() = %s\n",state->cwd);
+#endif
+	return (ret);
+}
+
+CWD_API int virtual_chdir(const char *path)
+{
+	CWDLS_FETCH();
+
+	return virtual_file_ex(&CWDG(cwd), path, php_is_dir_ok)?-1:0;
+}
+
+CWD_API int virtual_chdir_file(const char *path, int (*p_chdir)(const char *path))
+{
+	int length = strlen(path);
+	char *temp;
+	int retval;
+
+	if (length == 0) {
+		return 1; /* Can't cd to empty string */
+	}	
+	while(--length >= 0 && !IS_SLASH(path[length])) {
+	}
+
+	if (length == -1) {
+		return virtual_chdir(path);
+	}
+
+	if (length == COPY_WHEN_ABSOLUTE && IS_ABSOLUTE_PATH(path, length+1)) { /* Also use trailing slash if this is absolute */
+		length++;
+	}
+	temp = (char *) do_alloca(length+1);
+	memcpy(temp, path, length);
+	temp[length] = 0;
+#if VIRTUAL_CWD_DEBUG
+	fprintf (stderr, "Changing directory to %s\n", temp);
+#endif
+	retval = p_chdir(temp);
+	free_alloca(temp);
+	return retval;
+}
+
+CWD_API char *virtual_realpath(const char *path, char *real_path)
+{
+	cwd_state new_state;
+	int retval;
+    CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	retval = virtual_file_ex(&new_state, path, NULL);
+	
+	if(retval) {
+		int len = new_state.cwd_length>MAXPATHLEN-1?MAXPATHLEN-1:new_state.cwd_length;
+		memcpy(real_path, new_state.cwd, len);
+		real_path[len] = '\0';
+		return real_path;
+	}
+
+	return NULL;
+}
+
+CWD_API int virtual_filepath(const char *path, char **filepath)
+{
+	cwd_state new_state;
+	int retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	retval = virtual_file_ex(&new_state, path, php_is_file_ok);
+
+	*filepath = new_state.cwd;
+
+	return retval;
+}
+
+CWD_API FILE *virtual_fopen(const char *path, const char *mode)
+{
+	cwd_state new_state;
+	FILE *f;
+	CWDLS_FETCH();
+
+	if (path[0] == '\0') { /* Fail to open empty path */
+		return NULL;
+	}
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, path, NULL);
+
+	f = fopen(new_state.cwd, mode);
+
+	CWD_STATE_FREE(&new_state);
+	return f;
+}
+
+#if HAVE_UTIME
+CWD_API int virtual_utime(const char *filename, struct utimbuf *buf)
+{
+	cwd_state new_state;
+	int ret;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, filename, NULL);
+
+	ret = utime(new_state.cwd, buf);
+
+	CWD_STATE_FREE(&new_state);
+	return ret;
+}
+#endif
+
+CWD_API int virtual_chmod(const char *filename, mode_t mode)
+{
+	cwd_state new_state;
+	int ret;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, filename, NULL);
+
+	ret = chmod(new_state.cwd, mode);
+
+	CWD_STATE_FREE(&new_state);
+	return ret;
+}
+
+#ifndef PHP_WIN32
+CWD_API int virtual_chown(const char *filename, uid_t owner, gid_t group)
+{
+	cwd_state new_state;
+	int ret;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, filename, NULL);
+
+	ret = chown(new_state.cwd, owner, group);
+
+	CWD_STATE_FREE(&new_state);
+	return ret;
+}
+#endif
+
+CWD_API int virtual_open(const char *path, int flags, ...)
+{
+	cwd_state new_state;
+	int f;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, path, NULL);
+
+	if (flags & O_CREAT) {
+		mode_t mode;
+		va_list arg;
+
+		va_start(arg, flags);
+		mode = va_arg(arg, mode_t);
+		va_end(arg);
+
+		f = open(new_state.cwd, flags, mode);
+	} else {
+		f = open(new_state.cwd, flags);
+	}	
+	CWD_STATE_FREE(&new_state);
+	return f;
+}
+
+CWD_API int virtual_creat(const char *path, mode_t mode)
+{
+	cwd_state new_state;
+	int f;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, path, NULL);
+
+	f = creat(new_state.cwd,  mode);
+
+	CWD_STATE_FREE(&new_state);
+	return f;
+}
+
+
+CWD_API int virtual_stat(const char *path, struct stat *buf)
+{
+	cwd_state new_state;
+	int retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, path, NULL);
+
+	retval = stat(new_state.cwd, buf);
+
+	CWD_STATE_FREE(&new_state);
+	return retval;
+}
+
+#ifndef TSRM_WIN32
+
+CWD_API int virtual_lstat(const char *path, struct stat *buf)
+{
+	cwd_state new_state;
+	int retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, path, NULL);
+
+	retval = lstat(new_state.cwd, buf);
+
+	CWD_STATE_FREE(&new_state);
+	return retval;
+}
+
+#endif
+
+CWD_API int virtual_unlink(const char *path)
+{
+	cwd_state new_state;
+	int retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, path, NULL);
+
+	retval = unlink(new_state.cwd);
+
+	CWD_STATE_FREE(&new_state);
+	return retval;
+}
+
+CWD_API int virtual_mkdir(const char *pathname, mode_t mode)
+{
+	cwd_state new_state;
+	int retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, pathname, NULL);
+
+	retval = mkdir(new_state.cwd, mode);
+
+	CWD_STATE_FREE(&new_state);
+	return retval;
+}
+
+CWD_API int virtual_rmdir(const char *pathname)
+{
+	cwd_state new_state;
+	int retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, pathname, NULL);
+
+	retval = rmdir(new_state.cwd);
+
+	CWD_STATE_FREE(&new_state);
+	return retval;
+}
+
+CWD_API DIR *virtual_opendir(const char *pathname)
+{
+	cwd_state new_state;
+	DIR *retval;
+	CWDLS_FETCH();
+
+	CWD_STATE_COPY(&new_state, &CWDG(cwd));
+	virtual_file_ex(&new_state, pathname, NULL);
+
+	retval = opendir(new_state.cwd);
+
+	CWD_STATE_FREE(&new_state);
+	return retval;
+}
+
+#ifndef TSRM_WIN32
+
+CWD_API FILE *virtual_popen(const char *command, const char *type)
+{
+	int command_length;
+	char *command_line;
+	char *ptr;
+	FILE *retval;
+	CWDLS_FETCH();
+
+	command_length = strlen(command);
+
+	ptr = command_line = (char *) malloc(command_length + sizeof("cd  ; ") + CWDG(cwd).cwd_length+1);
+	if (!command_line) {
+		return NULL;
+	}
+	memcpy(ptr, "cd ", sizeof("cd ")-1);
+	ptr += sizeof("cd ")-1;
+
+	if (CWDG(cwd).cwd_length == 0) {
+		*ptr++ = DEFAULT_SLASH;
+	} else {
+		memcpy(ptr, CWDG(cwd).cwd, CWDG(cwd).cwd_length);
+		ptr += CWDG(cwd).cwd_length;
+	}
+	
+	*ptr++ = ' ';
+	*ptr++ = ';';
+	*ptr++ = ' ';
+
+	memcpy(ptr, command, command_length+1);
+	retval = popen(command_line, type);
+	free(command_line);
+	return retval;
+}
+
+#else
+
+/* On Windows the trick of prepending "cd cwd; " doesn't work so we need to perform
+   a real chdir() and mutex it
+ */
+CWD_API FILE *virtual_popen(const char *command, const char *type)
+{
+	char prev_cwd[MAXPATHLEN];
+	char *getcwd_result;
+	FILE *retval;
+	CWDLS_FETCH();
+
+	getcwd_result = getcwd(prev_cwd, MAXPATHLEN);
+	if (!getcwd_result) {
+		return NULL;
+	}
+
+#ifdef ZTS
+	tsrm_mutex_lock(cwd_mutex);
+#endif
+
+	chdir(CWDG(cwd).cwd);
+	retval = popen(command, type);
+	chdir(prev_cwd);
+
+#ifdef ZTS
+	tsrm_mutex_unlock(cwd_mutex);
+#endif
+
+	return retval;
+}
+
+#endif
+
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ */
diff --git a/TSRM/tsrm_virtual_cwd.h b/TSRM/tsrm_virtual_cwd.h
new file mode 100644
index 0000000000..93c5c67a57
--- /dev/null
+++ b/TSRM/tsrm_virtual_cwd.h
@@ -0,0 +1,145 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP version 4.0                                                      |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997, 1998, 1999, 2000 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.               |
+   +----------------------------------------------------------------------+
+   | Authors: Andi Gutmans <andi@zend.com>                                |
+   |          Sascha Schumann <sascha@schumann.cx>                        |
+   +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#ifndef VIRTUAL_CWD_H
+#define VIRTUAL_CWD_H
+
+#ifdef WIN32
+# define TSRM_WIN32
+#endif
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <ctype.h>
+
+#ifdef HAVE_UTIME_H
+#include <utime.h>
+#endif
+
+#ifdef HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+
+#ifndef TSRM_WIN32
+#include <unistd.h>
+#endif
+
+#ifdef TSRM_WIN32
+#include "win32/readdir.h"
+
+#define IS_SLASH(c)	((c) == '/' || (c) == '\\')
+
+#define IS_ABSOLUTE_PATH(path, len) \
+	(len >= 2 && isalpha(path[0]) && path[1] == ':')
+
+#else
+#ifdef HAVE_DIRENT_H
+#include <dirent.h>
+#endif
+
+#define IS_SLASH(c)	((c) == '/')
+
+#endif
+
+#ifndef IS_ABSOLUTE_PATH	
+#define IS_ABSOLUTE_PATH(path, len) \
+	(IS_SLASH(path[0]))
+#endif
+
+#if HAVE_UTIME
+# ifdef TSRM_WIN32
+#  include <sys/utime.h>
+# endif
+#endif
+
+#ifdef PHP_EXPORTS
+#define CWD_EXPORTS
+#endif
+
+#ifdef TSRM_WIN32
+#       ifdef CWD_EXPORTS
+#       define CWD_API __declspec(dllexport)
+#       else
+#       define CWD_API __declspec(dllimport)
+#       endif
+#else
+#define CWD_API
+#endif
+
+typedef struct _cwd_state {
+	char *cwd;
+	int cwd_length;
+} cwd_state;
+
+typedef int (*verify_path_func)(const cwd_state *);
+
+CWD_API void virtual_cwd_startup(void);
+CWD_API void virtual_cwd_shutdown(void);
+CWD_API char *virtual_getcwd_ex(int *length);
+CWD_API char *virtual_getcwd(char *buf, size_t size);
+CWD_API int virtual_chdir(const char *path);
+CWD_API int virtual_chdir_file(const char *path, int (*p_chdir)(const char *path));
+/* CWD_API void virtual_real_chdir_file(const char *path); */
+CWD_API int virtual_filepath(const char *path, char **filepath);
+CWD_API char *virtual_realpath(const char *path, char *real_path);
+CWD_API FILE *virtual_fopen(const char *path, const char *mode);
+CWD_API int virtual_open(const char *path, int flags, ...);
+CWD_API int virtual_creat(const char *path, mode_t mode);
+CWD_API int virtual_stat(const char *path, struct stat *buf);
+#ifndef TSRM_WIN32
+CWD_API int virtual_lstat(const char *path, struct stat *buf);
+#endif
+CWD_API int virtual_unlink(const char *path);
+CWD_API int virtual_mkdir(const char *pathname, mode_t mode);
+CWD_API int virtual_rmdir(const char *pathname);
+CWD_API DIR *virtual_opendir(const char *pathname);
+CWD_API FILE *virtual_popen(const char *command, const char *type);
+#if HAVE_UTIME
+CWD_API int virtual_utime(const char *filename, struct utimbuf *buf);
+#endif
+CWD_API int virtual_chmod(const char *filename, mode_t mode);
+#ifndef PHP_WIN32
+CWD_API int virtual_chown(const char *filename, uid_t owner, gid_t group);
+#endif
+
+CWD_API int virtual_file_ex(cwd_state *state, const char *path, verify_path_func verify_path);
+
+typedef struct _virtual_cwd_globals {
+	cwd_state cwd;
+} virtual_cwd_globals;
+
+#ifdef ZTS
+# define CWDLS_D  virtual_cwd_globals *cwd_globals
+# define CWDLS_DC , CWDLS_D
+# define CWDLS_C  cwd_globals
+# define CWDLS_CC , CWDLS_C
+# define CWDG(v) (cwd_globals->v)
+# define CWDLS_FETCH()    virtual_cwd_globals *cwd_globals = ts_resource(cwd_globals_id)
+#else
+# define CWDLS_D  void
+# define CWDLS_DC
+# define CWDLS_C
+# define CWDLS_CC
+# define CWDG(v) (cwd_globals.v)
+# define CWDLS_FETCH()
+#endif
+
+#endif /* VIRTUAL_CWD_H */