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import os
import sys
import netlib.utils
class MemBool(object):
"""
Truth-checking with a memory, for use in chained if statements.
"""
def __init__(self):
self.v = None
def __call__(self, v):
self.v = v
return bool(v)
data = netlib.utils.Data(__name__)
def daemonize(stdin='/dev/null', stdout='/dev/null', stderr='/dev/null'): # pragma: no cover
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError as e:
sys.stderr.write("fork #1 failed: (%d) %s\n" % (e.errno, e.strerror))
sys.exit(1)
os.chdir("/")
os.umask(0)
os.setsid()
try:
pid = os.fork()
if pid > 0:
sys.exit(0)
except OSError as e:
sys.stderr.write("fork #2 failed: (%d) %s\n" % (e.errno, e.strerror))
sys.exit(1)
si = open(stdin, 'rb')
so = open(stdout, 'a+b')
se = open(stderr, 'a+b', 0)
os.dup2(si.fileno(), sys.stdin.fileno())
os.dup2(so.fileno(), sys.stdout.fileno())
os.dup2(se.fileno(), sys.stderr.fileno())
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