autoreload.py

autoreload.py

#! /usr/bin/env python
#chmod +x daemon.py
#complete -cf daemon.py
import sys
import os
 

def daemonize(log):
    if not os.fork():
        os.setsid() 
        if not os.fork():
            os.dup2(null.fileno(), 0)
            os.dup2(log.fileno(), 1)
            os.dup2(log.fileno(), 2) 
        else:
            exit()
    else:
        exit()

def autoreload():
    while True:
        if not os.fork():
            os.execvp(sys.argv[1], sys.argv[1:])
        else:
            os.wait()

if __name__ == "__main__": 
    if len(sys.argv) < 2:
        print "daemon.py cmdline..."
        exit(0)
     
    log = open("/tmp/" + " ".join([k.replace("/", ".") for k in sys.argv[1:]]) + ".log", "w+", buffering=0)
    null = open("/dev/null", "r") 
    daemonize(log)
    autoreload()