Rename module jwutil to jwutils

Signed-off-by: Jan Lindemann <jan@janware.com>

tools/python/jwutils/MuteStdIO.py

@@ -0,0 +1,36 @@
+from __future__ import print_function
+import os
+import io
+import sys
+import traceback
+from fcntl import fcntl, F_GETFL, F_SETFL
+
+class MuteStdIO: # export
+
+    def __init__(self, mute_stderr=False, mute_stdout=True):
+        # TODO: arguments not implemented
+        pass
+
+    def __enter__(self):
+        rfd, wfd = os.pipe()
+        flags = fcntl(rfd, F_GETFL)
+        fcntl(rfd, F_SETFL, flags | os.O_NONBLOCK)
+        self.rfile = io.open(rfd, 'r')
+        self.fake_stdout_stream = io.open(wfd, 'w')
+        self.real_stdout_fd = os.dup(1)
+	#os.close(1)
+	os.dup2(wfd, 1)
+
+    def __exit__(self, type, value, traceback):
+	sys.stdout.flush()
+	os.dup2(self.real_stdout_fd, 1)
+	if type is not None:
+		#print("-------- Error while stdio was suppressed --------")
+		#traceback.print_stack()
+		#print(traceback)
+		print("-------- Captured output --------")
+                print(*self.rfile.readlines())
+                self.rfile.close()
+                #print('type = ' + str(type))
+                #print('value = ' + str(value))
+                raise type(value)