Add the daemon.

src/daemon.py

@@ -0,0 +1,63 @@
+# Copyright 2011 Florent Le Coz <louiz@louiz.org>
+#
+# This file is part of Poezio.
+#
+# Poezio is free software: you can redistribute it and/or modify
+# it under the terms of the zlib license. See the COPYING file.
+
+"""
+This file is a standalone program that creates a fifo file (if it doesn’t exist
+yet), opens it for reading, reads commands from it and executes them (each line
+should be a command).
+
+Usage: ./daemon.py <path_tofifo>
+
+That fifo should be in a directory, shared through sshfs, with the remote
+machine running poezio. Poezio then writes command in it, and this daemon
+executes them on the local machine.
+Note that you should not start this daemon if you do not trust the remote
+machine that is running poezio, since this could make it run any (dangerous)
+command on your local machine.
+"""
+
+import sys
+import threading
+import subprocess
+
+from fifo import Fifo
+
+class Executor(threading.Thread):
+    """
+    Just a class to execute commands in a thread.
+    This way, the execution can totally fail, we don’t care,
+    and we can start commands without having to wait for them
+    to return
+    """
+    def __init__(self, command):
+        threading.Thread.__init__(self)
+        self.command = command
+
+    def run(self):
+        print('executing %s' % (self.command,))
+        subprocess.call(self.command.split())
+
+def main(path):
+    while True:
+        fifo = Fifo(path, 'r')
+        while True:
+            line = fifo.readline()
+            if line == '':
+                del fifo
+                break
+            e = Executor(line)
+            e.start()
+
+def usage():
+    print('Usage: %s <fifo_name>' % (sys.argv[0],))
+
+if __name__ == '__main__':
+    argc = len(sys.argv)
+    if argc != 2:
+        usage()
+    else:
+        main(sys.argv[1])