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#!/usr/bin/env python
'''Main backend executable'''
__licence__ = "GPLv2"
__copyright__ = "2007, Lauri Taimila"
__author__ = "Lauri Taimila <lauri@taimila.com>"
__version__ = "0.1"
import ctypes
import gobject
import os
import sys
from entertainerlib.backend.backend_server import BackendServer
def daemonize(stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'):
'''Fork the backend server process'''
try:
pid = os.fork()
if pid > 0:
sys.exit(0) # Exit first parent
except OSError, e:
sys.stderr.write("First fork failed: (%d) %s\n" %
(e.errno, e.strerror))
sys.exit(1)
# Decouple from parent environment
os.chdir("/")
os.umask(0)
os.setsid()
# Perform the second fork
try:
pid = os.fork()
if pid > 0:
sys.exit(0) # Exit second parent
except OSError, e:
sys.stderr.write("Second fork failed: (%d) %s\n" %
(e.errno, e.strerror))
sys.exit(1)
for f in sys.stdout, sys.stderr:
f.flush()
si = file(stdin, 'r')
so = file(stdout, 'a+')
se = file(stderr, 'a+')
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
if __name__ == "__main__":
if len(sys.argv) > 1 and (sys.argv[1] == "--help" or sys.argv[1] == "-h"):
print 'Entertainer backend %s, Copyright (c) %s' % \
(__version__, __copyright__)
print ""
print "Usage:"
print " --help - This help listing"
print " --foreground - Run backend as foreground process"
sys.exit(0)
if len(sys.argv) > 1 and sys.argv[1] == "--foreground":
try:
backend = BackendServer()
except KeyboardInterrupt:
backend.quitBackend()
sys.exit()
else:
print "Entertainer backend starting..."
libc = ctypes.CDLL('libc.so.6')
libc.prctl(15, 'EntertainerBackend', 0, 0, 0)
daemonize()
backend = BackendServer()
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