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import os, socket, sys, signal
if len(sys.argv) < 4:
print('Bad arguments; exit.')
sys.exit(1)
elif len(sys.argv) > 4:
print('Extra args:', sys.argv[4:])
SOCKET_FILE = sys.argv[1]
PID_FILE = sys.argv[2]
LOG_FILE = sys.argv[3]
if os.path.exists(PID_FILE):
print('Already running; exit.')
sys.exit(1)
if os.fork() != 0:
sys.exit(0)
def cleanup():
global cs, sock
try:
cs.close()
except:
pass
sock.close()
os.remove(PID_FILE)
os.remove(SOCKET_FILE)
os.close(sys.stdout.fileno())
os.close(sys.stderr.fileno())
def stopsig(*args):
cleanup()
sys.exit(0)
signal.signal(signal.SIGTERM, stopsig)
logfd = os.open(LOG_FILE, os.O_WRONLY | os.O_APPEND | os.O_CREAT, mode=0o644)
os.close(sys.stdin.fileno())
os.dup2(logfd, sys.stdout.fileno())
os.dup2(logfd, sys.stderr.fileno())
os.close(logfd)
pidf = open(PID_FILE, 'w')
pidf.write('%d' % os.getpid())
pidf.close()
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.bind(SOCKET_FILE)
sock.listen(5)
try:
cs, ca = sock.accept()
while True:
cs.send(b'$ ')
data = cs.recv(1024)
if data == b'\xde\xad':
break
print('got some data: %s' % str(data, 'utf-8'))
cs.send(data+b'\n')
finally:
cleanup()
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