Virtualize realpath, chmod, chown and utime

This should fix #5935 and #5904
@- Virtualize realpath, chmod, chown and utime (Stas)

ext/standard/file.c

@@ -1979,15 +1979,16 @@ PHP_FUNCTION(fgetcsv) {
 PHP_FUNCTION(realpath)
 {
 	zval **path;
-	char resolved_path[MAXPATHLEN];
+	char resolved_path_buff[MAXPATHLEN];
 
 	if (ZEND_NUM_ARGS() != 1 || zend_get_parameters_ex(ZEND_NUM_ARGS(), &path) == FAILURE) {
 		WRONG_PARAM_COUNT;
 	}
 
 	convert_to_string_ex(path);
-	if (php_realpath((*path)->value.str.val, resolved_path)) {
-		RETURN_STRING(resolved_path, 1);
+	
+	if (V_REALPATH((*path)->value.str.val, resolved_path_buff)) {
+		RETURN_STRING(resolved_path_buff, 1);
 	} else {
 		RETURN_FALSE;
 	}

ext/standard/filestat.c

@@ -260,7 +260,7 @@ PHP_FUNCTION(chgrp)
 	if (php_check_open_basedir((*filename)->value.str.val))
 		RETURN_FALSE;
 
-	ret = chown((*filename)->value.str.val, -1, gid);
+	ret = V_CHOWN((*filename)->value.str.val, -1, gid);
 	if (ret == -1) {
 		php_error(E_WARNING, "chgrp failed: %s", strerror(errno));
 		RETURN_FALSE;
@@ -308,7 +308,7 @@ PHP_FUNCTION(chown)
 	if (php_check_open_basedir((*filename)->value.str.val))
 		RETURN_FALSE;
 
-	ret = chown((*filename)->value.str.val, uid, -1);
+	ret = V_CHOWN((*filename)->value.str.val, uid, -1);
 	if (ret == -1) {
 		php_error(E_WARNING, "chown failed: %s", strerror(errno));
 		RETURN_FALSE;
@@ -349,7 +349,7 @@ PHP_FUNCTION(chmod)
 	if(PG(safe_mode)) 
 	  imode &= 0777;
 
-	ret = chmod((*filename)->value.str.val, imode);
+	ret = V_CHMOD((*filename)->value.str.val, imode);
 	if (ret == -1) {
 		php_error(E_WARNING, "chmod failed: %s", strerror(errno));
 		RETURN_FALSE;
@@ -419,7 +419,7 @@ PHP_FUNCTION(touch)
 		fclose(file);
 	}
 
-	ret = utime((*filename)->value.str.val, newtime);
+	ret = V_UTIME((*filename)->value.str.val, newtime);
 	if (newtime) efree(newtime);
 	if (ret == -1) {
 		php_error(E_WARNING, "utime failed: %s", strerror(errno));

main/fopen_wrappers.c

@@ -187,7 +187,7 @@ PHPAPI int php_check_specific_open_basedir(char *basedir, char *path PLS_DC)
 	}
 
 	/* Resolve the real path into resolved_name */
-	if ((php_realpath(path, resolved_name) != NULL) && (php_realpath(local_open_basedir, resolved_basedir) != NULL)) {
+	if ((V_REALPATH(path, resolved_name) != NULL) && (V_REALPATH(local_open_basedir, resolved_basedir) != NULL)) {
 		/* Check the path */
 #ifdef PHP_WIN32
 		if (strncasecmp(resolved_basedir, resolved_name, strlen(resolved_basedir)) == 0) {

main/php.h

@@ -303,6 +303,7 @@ PHPAPI int cfg_get_string(char *varname, char **result);
 #define V_CHDIR(path) virtual_chdir(path)
 #define V_CHDIR_FILE(path) virtual_chdir_file(path)
 #define V_GETWD(buf)
+#define V_REALPATH(path,realpath) virtual_realpath(path,realpath)
 #define V_STAT(path, buff) virtual_stat(path, buff)
 #ifdef PHP_WIN32
 #define V_LSTAT(path, buff) virtual_stat(path, buff)
@@ -314,7 +315,13 @@ PHPAPI int cfg_get_string(char *varname, char **result);
 #define V_RMDIR(pathname) virtual_rmdir(pathname)
 #define V_OPENDIR(pathname) virtual_opendir(pathname)
 #define V_POPEN(command, type) virtual_popen(command, type)
-
+#if HAVE_UTIME
+#define V_UTIME(path,time) virtual_utime(path,time)
+#endif
+#define V_CHMOD(path,mode) virtual_chmod(path,mode)
+#ifndef PHP_WIN32
+#define V_CHOWN(path,owner,group) virtual_chown(path,owner,group)
+#endif
 #else
 
 #define V_GETCWD(buff, size) getcwd(buff,size)
@@ -331,7 +338,14 @@ PHPAPI int cfg_get_string(char *varname, char **result);
 #define V_RMDIR(pathname) rmdir(pathname)
 #define V_OPENDIR(pathname) opendir(pathname)
 #define V_POPEN(command, type) popen(command, type)
-
+#define V_REALPATH(path,realpath) realpath(path,realpath)
+#if HAVE_UTIME
+#define V_UTIME(path,time) utime(path,time)
+#endif
+#define V_CHMOD(path,mode) chmod(path,mode)
+#ifndef PHP_WIN32
+#define V_CHOWN(path,owner,group) chown(path,owner,group)
+#endif
 #endif
 
 #include "zend_constants.h"

main/php_virtual_cwd.c

@@ -33,6 +33,15 @@
 #include "win95nt.h"
 #endif
 
+#if HAVE_UTIME
+# ifdef PHP_WIN32
+#  include <sys/utime.h>
+# else
+#  include <utime.h>
+# endif
+#endif
+
+
 #include "php_virtual_cwd.h"
 #include "php_reentrancy.h" /* for php_strtok_r */
 
@@ -390,6 +399,7 @@ CWD_API int virtual_file_ex(cwd_state *state, const char *path, verify_path_func
 		ret = 1;
 	} else {
 		CWD_STATE_FREE(old_state);
+		ret = (verify_path)? 0:1;
 	}
 	
 	free(old_state);
@@ -438,6 +448,24 @@ CWD_API int virtual_chdir_file(char *path)
 	return retval;
 }
 
+CWD_API char *virtual_realpath(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 = min(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(char *path, char **filepath)
 {
@@ -472,6 +500,55 @@ CWD_API FILE *virtual_fopen(const char *path, const char *mode)
 	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;

main/php_virtual_cwd.h

@@ -69,6 +69,7 @@ CWD_API char *virtual_getcwd(char *buf, size_t size);
 CWD_API int virtual_chdir(char *path);
 CWD_API int virtual_chdir_file(char *path);
 CWD_API int virtual_filepath(char *path, char **filepath);
+CWD_API char *virtual_realpath(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);
@@ -81,6 +82,13 @@ 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);