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|
#!/usr/bin/env python3
import os
import sys
import re
import subprocess
import datetime
import signal
import time
from threading import Thread
__log_prefix__ = '/home/minecraft/log/'
__folderprefix__ = '/dev/shm/'
__folder__ = __folderprefix__
__players__ = 'players'
__status__ = 'status'
__pipe__ = 'input_pipe'
__log__ = 'none.log'
__STATUSSTRINGS__ = { 0: "Not running",
1: "Starting",
2: "Running",
3: "Stopping"
}
def __setfiles__(identifier):
global __folder__
global __players__
global __status__
global __pipe__
global __log__
__folder__ = __folderprefix__ + 'mcwrapper_' + identifier + '/'
__players__ = __folder__ + 'players'
__status__ = __folder__ + 'status'
__pipe__ = __folder__ + 'input_pipe'
__log__ = __log_prefix__ + identifier + '/' + \
datetime.datetime.now().strftime('%y-%m-%d-%H-%M-%S')
def __user_join__(username):
print("User '" + username + "' joined server.")
with open(__players__, 'a') as f:
f.write(username + '\n')
def __user_leave__(username):
print("User '" + username + "' left server.")
players = set()
with open(__players__) as f:
for line in f:
pl = line.rstrip()
if pl != username:
players.add(line.rstrip())
with open(__players__, 'w') as f:
f.writelines(players)
if players:
f.write('\n')
def __server_init__(identifier):
__setfiles__(identifier)
__server_clean__() # Clean before execute
print("Wrapper initializing with identifier: " + identifier)
try:
os.mkdir(__folder__)
except Exception:
pass
if os.path.isfile(__status__):
sys.exit("Server status file already exists. Is another wrapper running?")
with open(__status__, 'w') as f:
f.write(__STATUSSTRINGS__[1])
os.mkfifo(__pipe__, 0o640)
def __server_start__():
print("Server start.")
with open(__status__, 'w') as f:
f.write(__STATUSSTRINGS__[2])
pass
def __server_stop__():
print("Server stop.")
with open(__status__, 'w') as f:
f.write(__STATUSSTRINGS__[3])
pass
def __server_clean__():
print("Wrapper clean.")
try:
os.remove(__players__)
except Exception:
pass
try:
os.remove(__status__)
except Exception:
pass
try:
os.remove(__pipe__)
except Exception:
pass
def __parse_line__(line):
if ': Done' in line:
__server_start__()
elif ': Stopping the server' in line:
__server_stop__()
elif 'logged in with entity id' in line:
name = line[len('[00:00:00] [Server thread/INFO]: '):]
name = name[:name.index('[')]
__user_join__(name)
elif 'left the game' in line:
name = line[len('[00:00:00] [Server thread/INFO]: '):]
name = name[:name.index(' ')]
__user_leave__(name)
#################################################################################
class __InputThread__(Thread):
def __init__(self, pipein, pipeprocess):
Thread.__init__(self, name='InputThread')
self.pipein = pipein
self.pipeprocess = pipeprocess
self.stopread = False
def stopexec(self):
self.stopread = True
def wake(self):
with open(__pipe__, 'w') as f:
f.write("\n")
f.flush()
def run(self):
with open(self.pipein, 'r') as p:
while not self.stopread:
ln = p.readline()
if ln:
print("Input: " + ln, end="")
self.pipeprocess.write(bytes(ln, sys.getdefaultencoding()))
self.pipeprocess.flush()
else:
time.sleep(1)
try:
os.remove(__pipe__)
except Exception:
pass
def __server_send_stop__():
global prc
prc.stdin.write(bytes("/stop\n", sys.getdefaultencoding()))
prc.stdin.flush()
def mcexec(identifier, cmd):
"""Executes cmd and parses output for server status changes.
cmd - List of program and arguments to be executed.
logfile - Path in string. To entered file will be printed out full process output.
"""
global prc
__server_init__(identifier)
try:
os.makedirs(__log_prefix__ + identifier)
except Exception:
pass
prc = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT)
inputThread = __InputThread__(__pipe__, prc.stdin)
inputThread.start()
inputThread.wake() # Input thread is stack in waiting for first line
for linen in prc.stdout:
line = linen.decode(sys.getdefaultencoding())
with open(__log__, 'a') as flg:
flg.write(line)
__parse_line__(line.rstrip())
inputThread.stopexec()
__server_clean__()
#################################################################################
def __get_status__(identifier):
if not os.path.isfile(__status__):
return 0
else:
with open(__status__) as f:
status = f.readline().rstrip()
for key, val in __STATUSSTRINGS__.items():
if val == status:
return key
def server_stop(identifier):
__setfiles__(identifier)
status = __get_status__(identifier)
if status == 0:
sys.exit("Such server is not running")
elif status == 1:
print("Server is starting. Waiting...")
while __get_status__(identifier) != 2:
time.sleep(1)
elif status == 3:
sys.exit("Server already stops")
with open(__pipe__, 'w') as f:
f.write("/stop\n")
f.flush()
while os.path.isfile(__status__):
pass
def server_say(identifier, message):
__setfiles__(identifier)
if __get_status__(identifier) != 2:
sys.exit("Server is not running")
with open(__pipe__, 'w') as f:
f.write("/say " + ' '.join(map(str, message)))
f.flush()
#################################################################################
def __signal_term__(_signo, _stack_frame):
__server_send_stop__()
if __name__ == '__main__':
todo = sys.argv[1]
identifier = sys.argv[2]
if todo == 'start':
signal.signal(signal.SIGTERM, __signal_term__)
cmd = sys.argv[3:]
mcexec(identifier, cmd)
__server_clean__()
elif todo == 'stop':
server_stop(identifier)
elif todo == 'say':
message = sys.argv[3:]
server_say(identifier, message)
else:
print("unknown action: " + todo)
|
