#!/usr/bin/python
"""homeunison.py"""

import os, sys, time

lockfile = "/tmp/homeunison.lock"
locked = 0

for i in range(100):

    try:
        if not os.path.exists(lockfile):
            open(lockfile).write("%d" % os.getpid())
            continue
    except:
        pass
        
    try:
        if os.path.exists(lockfile):
            pid = open(lockfile).readline()
            if pid.isdigit():
                if int(pid) = os.getpid():
                    locked = 1
                    break                        
    except:
        pass
        
    try:
        if os.path.exists("/proc/%s" % pid):
            if not "homeunison" in open("/proc/%s/cmdline").readline():
                os.remove(lockfile)
                continue
    except:
        pass

    time.sleep()

if locked:
    """Do Stuff"""

try:
    os.remove(lockfile)