def daemonize(): # {{{
try:
pid = os.fork()
if pid > 0:
# exit first parent
sys.exit(0)
except OSError as e:
raise SystemExit('fork #1 failed: %s' % as_unicode(e))
# decouple from parent environment
os.chdir("/")
os.setsid()
os.umask(0)
# do second fork
try:
pid = os.fork()
if pid > 0:
# exit from second parent
sys.exit(0)
except OSError as e:
raise SystemExit('fork #2 failed: %s' % as_unicode(e))
# Redirect standard file descriptors.
speedup.detach(os.devnull)
def do_detach(fork=True, setsid=True, redirect=True):
global is_detached
if fork:
# Detach from the controlling process.
if os.fork() != 0:
raise SystemExit(0)
if setsid:
os.setsid()
if redirect:
from calibre_extensions.speedup import detach
detach(os.devnull)
is_detached = True
def nuke_stdout():
# Redirect stdout, stdin and stderr to /dev/null
from calibre_extensions.speedup import detach
detach(os.devnull)