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#!/usr/bin/python3
import os, sys, signal, socket, threading, time
# basic config
SOCKET_FILE = "/run/pk/pk.sock"
PID_FILE = "/run/pk/pk.pid"
DAEMON_FILE = "/usr/bin/pkd"
LOG_FILE = "/var/log/pk.log"
KEY_FILE = "/etc/pk/server_key.json"
DAEMON_PORT = 2236
DAEMON_BITS = 4096
def isd_running():
return os.path.isfile(PID_FILE)
def startd():
return os.system('%s %s %s %s %d %d %s' % (DAEMON_FILE, SOCKET_FILE,\
PID_FILE, LOG_FILE, \
DAEMON_BITS, DAEMON_PORT,\
KEY_FILE))
def signald(sig):
if not isd_running():
return False
pidf = open(PID_FILE, 'r')
pid = int(pidf.read().strip())
pidf.close()
try:
os.kill(pid, sig)
except ProcessLookupError:
os.remove(PID_FILE)
return False
return True
def pnnl(s):
sys.stdout.write(s)
sys.stdout.flush()
def print_help():
print('Usage: %s COMMAND [OPTIONS]...' % sys.argv[0])
print('Dispatch COMMAND to the PK Daemon.')
print('Example: %s attach' % sys.argv[0])
print()
print('Commands:')
print('\tstart\t\t\t\tstart the daemon')
print('\tstop\t\t\t\tstop the daemon')
print('\trestart\t\t\t\trestart the daemon')
print('\tattach\t\t\t\tcontrol the daemon via attached screen')
def start_cmd():
return startd() == 0
def stop_cmd():
return signald(signal.SIGTERM)
def attach_reader(sock, state):
while state['attached']:
try:
data = sock.recv(1024)
except:
data = b'\xde\xad'
if data == b'\xde\xad':
state['attached'] = False
break
if len(data) > 0:
pnnl(str(data, 'utf-8'))
sock.close()
def attach_cmd():
if not isd_running():
return False
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
state = {}
reader_thread = threading.Thread(target=attach_reader, args=(sock, state))
try:
sock.connect(SOCKET_FILE)
except:
sock.close()
return False
state['attached'] = True
reader_thread.start()
while state['attached']:
try:
line = bytes(input().strip(), 'utf-8')
except EOFError:
print('detach')
line = b'detach'
if line == b'detach':
try:
sock.sendall(b'\xde\xad')
except:
pass
state['attached'] = False
elif line == b'clear':
os.system('clear')
line = b'\xc0\xdeprompt'
elif len(line) < 1:
line = b'\xc0\xdeprompt'
if not state['attached']:
break
try:
sock.sendall(line)
except:
state['attached'] = False
break
state['attached'] = False
sock.close()
reader_thread.join()
return True
def main():
if len(sys.argv) < 2 or sys.argv[1] == 'help':
print_help()
elif sys.argv[1] == 'start':
if len(sys.argv) > 2:
print('Unrecognized option(s):', *sys.argv[2:])
print_help()
return
if start_cmd():
print('Daemon started.')
else:
print('Failed to start daemon.')
elif sys.argv[1] == 'stop':
if len(sys.argv) > 2:
print('Unrecognized option(s):', *sys.argv[2:])
print_help()
return
if stop_cmd():
print('Dispatched stop command to daemon.')
else:
print('Failed to stop daemon; ensure it is running.')
elif sys.argv[1] == 'restart':
if len(sys.argv) > 2:
print('Unrecognized option(s):', *sys.argv[2:])
print_help()
return
if stop_cmd():
print('Dispatched stop command to daemon.')
time.sleep(2)
else:
print('Daemon was not running so will not be stopped.')
if start_cmd():
print('Daemon started.')
else:
print('Failed to start daemon.')
elif sys.argv[1] == 'attach':
if len(sys.argv) > 2:
print('Unrecognized option(s):', *sys.argv[2:])
print_help()
return
if attach_cmd():
print('Detached from daemon; quitting.')
else:
print('Cannot contact daemon; ensure it is running and you have access to it.')
else:
print('Unrecognized command:', sys.argv[1])
print_help()
if __name__ == '__main__':
main()
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