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#!/usr/bin/env python3
path_ = "/home/froggo/.cache/pawse"
import sys, subprocess, os, psutil, json
from pathlib import Path
from multiprocessing import Process as mp_proc
from io import TextIOWrapper
alias = {
'help': ['help', '--help', 'h', '-h'],
'create': ['create', '--create', 'c', '-c'],
'join': ['join', '--join', 'j', '-j'],
'kill': ['kill', '--kill', 'k', '-k'],
'restart': ['restart', '--restart', 'r', '-r'],
'isrunning': ['isrunning', '--isrunning', 'i', '-i']
}
all_cmd = []
for cmd in alias.keys():
all_cmd += alias[cmd]
for arg in sys.argv:
if arg in all_cmd:
sys.argv = sys.argv[sys.argv.index(arg):]
if sys.argv == []:
sys.argv = ['help']
def read_stdout(name):
cache = 0
while True:
try:
p_stdout = open(f'{path_}/{name}.stdout', 'r')
except FileNotFoundError:
sys.exit()
try:
sys.stdout.write(list(p_stdout)[cache])
cache += 1
except IndexError:
pass
p_stdout.close()
def rm_silent(f):
try:
os.remove(f)
except FileNotFoundError:
pass
def cleanup(name):
rm_silent(f'{path_}/{name}.stdin')
rm_silent(f'{path_}/{name}.stdout')
rm_silent(f'{path_}/{name}.pid')
# def pawse_stdin_gen(name):
# class pawse_stdin():#TextIOWrapper):
# def __init__():
# open(f'{path_}/{name}.stdin', 'w')
# def read():
# f = open(f'{path_}/{name}.stdin')
# data = f.read()
# f.close()
# return data
# def fileno():
# return 0
# return pawse_stdin
def cmda(a):
return sys.argv[0] in alias[a]
commands = {}
def assign(arg):
def assign_func(l):
commands[arg] = l
return assign_func
@assign('help')
def help():
print('')
@assign('create')
def create(name = sys.argv[1], cmdlineargs = sys.argv[2:]):
cleanup(name)
Path(f'{path_}/{name}.stdin').touch()
p_stdout = open(f'{path_}/{name}.stdout', 'a')
#p_stdin = open(f'{path_}/{name}.stdin') #pawse_stdin_gen(name)
open(f'{path_}/{name}.pid', 'w').write(str(subprocess.Popen(['bash', '-c', f'{" ".join(cmdlineargs)} < <(tail -f {path_}/{name}.stdin)'], stdout=p_stdout, stderr=p_stdout).pid))
open(f'{path_}/{name}.sh', 'w').write(json.dumps(cmdlineargs))
# sys.exit()
@assign('join')
def join(name = sys.argv[1]):
try:
if not Path(f'{path_}/{name}.stdin').exists():
print(f"No process named '{name}'.")
sys.exit()
p = mp_proc(target=read_stdout, args=(name,))
p.daemon = True
print('Connected to pawse process\n-----')
p.start()
for l in sys.stdin:
p_stdin = open(f'{path_}/{name}.stdin', 'a')
p_stdin.write(l)
p_stdin.close()
#print('>> ', end='')
#print(f'>> {l}')
except KeyboardInterrupt:
print('\n\nDisconnected from pawse process')
sys.exit()
@assign('kill')
def kill(name = sys.argv[1]):
try:
subprocess.Popen(['kill', open(f'{path_}/{name}.pid').read()])
except FileNotFoundError:
pass
if not commands['isrunning'](name):
cleanup(name)
print("The pawse process has been terminated.")
@assign('restart')
def restart(name = sys.argv[1]):
try:
claf = open(f'{path_}/{name}.sh')
cla = json.loads(claf.read())
claf.close()
commands['kill'](name)
if not commands['isrunning'](name):
commands['create'](name, cla)
print(f"Pawse process '{name}' ('{' '.join(cla)}') restarted sucessfully.")
return
print(f"Pawse process '{name}' ('{' '.join(cla)}') didn't terminate.")
except Exception as e:
print(e)
@assign('isrunning')
def isrunning(name = sys.argv[1]):
o = True
pid = None
try:
pidf = open(f'{path_}/{name}.pid')
pid = int(pidf.read())
pidf.close()
psutil.Process(pid)
except (FileNotFoundError, psutil.NoSuchProcess):
o = False
cleanup(name)
print([f"Pawse process '{name}' is not running.", f"Pawse process '{name}' is running with PID {pid}."][o])
return o
r = True
if sys.argv[0] not in all_cmd:
print(f"Unexpected command '{sys.argv[0]}'. Type 'pawse help' for help.")
r = False
for x in commands.keys():
if cmda(x) and r:
commands[x]()
r = False
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