4 files changed, 32 insertions, 4 deletions
diff --git a/core/os/dir_access.cpp b/core/os/dir_access.cpp
index 2c1c655175..d81c30f33a 100644
--- a/core/os/dir_access.cpp
+++ b/core/os/dir_access.cpp
@@ -330,7 +330,7 @@ Error DirAccess::copy(String p_from, String p_to, int p_chmod_flags) {
 
 	if (err == OK && p_chmod_flags != -1) {
 		fdst->close();
-		err = fdst->_chmod(p_to, p_chmod_flags);
+		err = FileAccess::set_unix_permissions(p_to, p_chmod_flags);
 		// If running on a platform with no chmod support (i.e., Windows), don't fail
 		if (err == ERR_UNAVAILABLE)
 			err = OK;
diff --git a/core/os/file_access.cpp b/core/os/file_access.cpp
index 4be1364278..079f51bada 100644
--- a/core/os/file_access.cpp
+++ b/core/os/file_access.cpp
@@ -507,6 +507,29 @@ uint64_t FileAccess::get_modified_time(const String &p_file) {
 	return mt;
 }
 
+uint32_t FileAccess::get_unix_permissions(const String &p_file) {
+
+	if (PackedData::get_singleton() && !PackedData::get_singleton()->is_disabled() && PackedData::get_singleton()->has_path(p_file))
+		return 0;
+
+	FileAccess *fa = create_for_path(p_file);
+	ERR_FAIL_COND_V(!fa, 0);
+
+	uint32_t mt = fa->_get_unix_permissions(p_file);
+	memdelete(fa);
+	return mt;
+}
+
+Error FileAccess::set_unix_permissions(const String &p_file, uint32_t p_permissions) {
+
+	FileAccess *fa = create_for_path(p_file);
+	ERR_FAIL_COND_V(!fa, ERR_CANT_CREATE);
+
+	Error err = fa->_set_unix_permissions(p_file, p_permissions);
+	memdelete(fa);
+	return err;
+}
+
 void FileAccess::store_string(const String &p_string) {
 
 	if (p_string.length() == 0)
diff --git a/core/os/file_access.h b/core/os/file_access.h
index 9df2a5cade..4930eae35a 100644
--- a/core/os/file_access.h
+++ b/core/os/file_access.h
@@ -56,6 +56,9 @@ public:
 	bool endian_swap;
 	bool real_is_double;
 
+	virtual uint32_t _get_unix_permissions(const String &p_file) = 0;
+	virtual Error _set_unix_permissions(const String &p_file, uint32_t p_permissions) = 0;
+
 protected:
 	String fix_path(const String &p_path) const;
 	virtual Error _open(const String &p_path, int p_mode_flags) = 0; ///< open a file
@@ -148,14 +151,14 @@ public:
 
 	virtual Error reopen(const String &p_path, int p_mode_flags); ///< does not change the AccessType
 
-	virtual Error _chmod(const String &p_path, int p_mod) { return ERR_UNAVAILABLE; }
-
 	static FileAccess *create(AccessType p_access); /// Create a file access (for the current platform) this is the only portable way of accessing files.
 	static FileAccess *create_for_path(const String &p_path);
 	static FileAccess *open(const String &p_path, int p_mode_flags, Error *r_error = NULL); /// Create a file access (for the current platform) this is the only portable way of accessing files.
 	static CreateFunc get_create_func(AccessType p_access);
 	static bool exists(const String &p_name); ///< return true if a file exists
 	static uint64_t get_modified_time(const String &p_file);
+	static uint32_t get_unix_permissions(const String &p_file);
+	static Error set_unix_permissions(const String &p_file, uint32_t p_permissions);
 
 	static void set_backup_save(bool p_enable) { backup_save = p_enable; };
 	static bool is_backup_save_enabled() { return backup_save; };
diff --git a/core/os/os.h b/core/os/os.h
index 12012fba80..4ae8a354e5 100644
--- a/core/os/os.h
+++ b/core/os/os.h
@@ -45,6 +45,8 @@
 	@author Juan Linietsky <reduzio@gmail.com>
 */
 
+class Mutex;
+
 class OS {
 
 	static OS *singleton;
@@ -260,7 +262,7 @@ public:
 	virtual int get_low_processor_usage_mode_sleep_usec() const;
 
 	virtual String get_executable_path() const;
-	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false) = 0;
+	virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL, bool read_stderr = false, Mutex *p_pipe_mutex = NULL) = 0;
 	virtual Error kill(const ProcessID &p_pid) = 0;
 	virtual int get_process_id() const;