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authorFlorent Le Coz <louiz@louiz.org>2011-10-29 05:13:12 +0200
committerFlorent Le Coz <louiz@louiz.org>2011-10-29 05:13:12 +0200
commit1303919706c74352be28c55e0f4516b994ebdb5b (patch)
tree2c16a977a29e346fe70066daa4be85bfa9eeab7b
parent7e16ffd9e0558b4895684c61f49059f7e603dc06 (diff)
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Add the daemon.
-rwxr-xr-xsrc/daemon.py63
1 files changed, 63 insertions, 0 deletions
diff --git a/src/daemon.py b/src/daemon.py
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index 00000000..a9d888f1
--- /dev/null
+++ b/src/daemon.py
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+# 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])