ignore not readable file on uploading a folder

Author: zhanghongce

.gitignore

@@ -1,3 +1,6 @@
+#backup file
+*.*~
+
 *.py[cod]
 
 # C extensions

bypy.py

@@ -1557,7 +1557,10 @@ def __walk_upload(self, arg, dirname, names):
 
 		result = ENoError
 		for name in names:
-			lfile = os.path.join(dirname, name)
+			lfile = os.path.join(dirname, name)		
+			if not os.access(lfile,os.R_OK):
+				self.pv('ignoring {} due to permission problem'.format(lfile))
+				continue
 			if os.path.isfile(lfile):
 				self.__current_file = lfile
 				self.__current_file_size = getfilesize(lfile)
@@ -2177,6 +2180,9 @@ def __proceed_local_gather(self, arg, dirname, names):
 		dirs = []
 		for name in names:
 			fullname = os.path.join(dirname, name)
+			if not os.access(fullname,os.R_OK):
+				self.pv('Ignoring file {} due to permission problem'.format(fullname));
+				continue
 			if os.path.isfile(fullname):
 				files.append((name, getfilesize(fullname), md5(fullname)))
 			elif os.path.isdir(fullname):