klaus init.d script

initklaus.py

#!/usr/bin/python
### BEGIN INIT INFO
# Provides:          klaus
# Required-Start:    
# Required-Stop:     
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Git GUI loader
# Description:       Start klaus git web front end
# 
### END INIT INFO

import sys
import os


def start():
    if os.path.exists(pid):
        print "Already started!"
        sys.exit(1)
    newpid = os.fork()
    if newpid > 0:
        sys.exit(0)
    os.chdir('/')
    os.umask(0)
    os.setsid()
    newpid = os.fork()
    if newpid > 0:
        sys.exit(0)
    f = open(pid, 'w+')
    f.write(str(os.getpid()))
    f.close()
    os.chdir(dirl)
    sys.stdin = open(os.devnull, 'r')
    sys.stderr = open(os.devnull, 'a+')
    sys.stdout = open(os.devnull, 'a+')
    os.dup2(sys.stdin.fileno(), 0)
    os.dup2(sys.stdout.fileno(), 1)
    os.dup2(sys.stderr.fileno(), 2)
    os.execv(cmd[0], cmd[1:])

def stop():
    if not os.path.exists(pid):
        print "Not started!"
        exit(1)
    f = open(pid, 'r')
    oldpid = f.read()
    f.close()
    try:
        os.kill(int(oldpid), 9)
    except OSError, error:
        print str(error)
    os.remove(pid)

if __name__ == "__main__":
    if not len(sys.argv) > 1:
       exit(1)
    if not sys.argv[1]:
       exit(1)

    command = sys.argv[1]

    pid = '/var/run/klaus.pid'
    dirl = '/home/git/klaus'
    repos = '/home/git/repositories/'
    cmd = ['/usr/bin/env', 'python', './bin/klaus', '--host', '192.168.0.13', '--sitename', 'localgit']
    cmd.extend([repos + x for x in os.listdir(repos)])

    if command == "start":
        start()
    elif command == "stop":
        stop()
    elif command == "restart":
        stop()
        start()
    else:
        print "Unknown command"
        exit(1)