host side for barebox remote control

This contains the host tool for barebox remote control. It is written in
Phython with its own implementation of the RATP protocol. Currently this
is a very simple tool which needs more work, but the code can also be
used as a library.

Example output:

console: '.      '
console: '..     '
console: 'dev    '
console: 'env    '
console: 'mnt    '
console: '\n'
Result: BBPacketCommandReturn(exit_code=0)

Signed-off-by: Jan Lübbe <j.luebbe@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Tested-by: Andrey Smirnov <andrew.smirnov@gmail.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/scripts/remote/threadstdio.py b/scripts/remote/threadstdio.py
new file mode 100644
index 0000000000..db249892ac
--- /dev/null
+++ b/scripts/remote/threadstdio.py
@@ -0,0 +1,47 @@
+#!/usr/bin/python2
+
+import os
+import sys
+import termios
+import atexit
+from threading import Thread
+from Queue import Queue, Empty
+
+class ConsoleInput(Thread):
+    def __init__(self, queue, exit='\x14'):
+        Thread.__init__(self)
+        self.daemon = True
+        self.q = queue
+        self._exit = exit
+        self.fd = sys.stdin.fileno()
+        old = termios.tcgetattr(self.fd)
+        new = termios.tcgetattr(self.fd)
+        new[3] = new[3] & ~termios.ICANON & ~termios.ECHO & ~termios.ISIG
+        new[6][termios.VMIN] = 1
+        new[6][termios.VTIME] = 0
+        termios.tcsetattr(self.fd, termios.TCSANOW, new)
+
+        def cleanup():
+            termios.tcsetattr(self.fd, termios.TCSAFLUSH, old)
+        atexit.register(cleanup)
+
+    def run(self):
+        while True:
+            c = os.read(self.fd, 1)
+            if c == self._exit:
+                self.q.put((self, None))
+                return
+            else:
+                self.q.put((self, c))
+
+if __name__ == "__main__":
+    q = Queue()
+    i = ConsoleInput(q)
+    i.start()
+    while True:
+        event = q.get(block=True)
+        src, c = event
+        if c == '\x04':
+            break
+        os.write(sys.stdout.fileno(), c.upper())
+