tyshell

   1 #!/usr/bin/python3
   2 import os
   3 import readline
   4 import shlex
   5 import sys
   6 import subprocess
   7 import socket
   8
   9 tuerSock = "/run/tuer.sock"
  10
  11 # use a histfile
  12 histfile = os.path.join(os.path.expanduser("~"), ".pyshellhist")
  13 try:
  14     readline.read_history_file(histfile)
  15 except IOError:
  16     pass
  17 import atexit
  18 atexit.register(readline.write_history_file, histfile)
  19
  20 # available commands
  21 def help(c):
  22         print("Available commands: %s" % ", ".join(sorted(commands.keys())))
  23
  24 def extcmd(cmd):
  25         def run(c):
  26                 ret = subprocess.call(cmd)
  27                 if ret != 0:
  28                         print("Command returned non-zero exit statis %d" % ret)
  29         return run
  30
  31 def sendcmd(addr, cmd):
  32         def run(c):
  33                 print("Running %s..." % (cmd))
  34                 s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
  35                 s.connect(addr)
  36                 s.send(cmd.encode())
  37                 data = s.recv(4)
  38                 s.close()
  39                 print("...done")
  40                 if data != b'1':
  41                         print("Received unexpected answer %s" % str(data))
  42         return run
  43
  44 commands = {
  45         'exit': None, # catched below, quits the loop
  46         'help': help,
  47         'open': sendcmd(tuerSock, 'open'),
  48         'close': sendcmd(tuerSock, 'close'),
  49         'buzz': sendcmd(tuerSock, 'buzz'),
  50 }
  51
  52 # input loop
  53 print("Welcome to tyshell. Use help to see what you can do.")
  54 while True:
  55         try:
  56                 command = input("$ ")
  57         except EOFError:
  58                 print()
  59                 break
  60         command = shlex.split(command)
  61         if not len(command): continue
  62         # execute command
  63         if command[0] == "exit":
  64                 break
  65         elif command[0] in commands:
  66                 try:
  67                         commands[command[0]](command)
  68                 except Exception as e:
  69                         print("Error while executing %s: %s" % (command[0], str(e)))
  70         else:
  71                 print("Command %s not found. Use help." % command[0])
  72 print("Bye")