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 # FIXME: Why not ".tyshellhist"?
  13 histfile = os.path.join(os.path.expanduser("~"), ".pyshellhist")
  14 try:
  15     readline.read_history_file(histfile)
  16 except IOError:
  17     pass
  18 import atexit
  19 atexit.register(readline.write_history_file, histfile)
  20 atexit.register(print, "Bye")
  21
  22 # available commands
  23 def help(c):
  24         print("Available commands: %s" % ", ".join(sorted(commands.keys())))
  25
  26 def extcmd(cmd):
  27         def run(c):
  28                 ret = subprocess.call(cmd)
  29                 if ret != 0:
  30                         print("Command returned non-zero exit statis %d" % ret)
  31         return run
  32
  33 def sendcmd(addr, cmd):
  34         def run(c):
  35                 print("Running %s..." % (cmd))
  36                 s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
  37                 s.connect(addr)
  38                 s.send(cmd.encode())
  39                 data = s.recv(4)
  40                 s.close()
  41                 print("...done")
  42                 if data != b'1':
  43                         print("Received unexpected answer %s" % str(data))
  44         return run
  45
  46 def exitcmd(c):
  47         sys.exit(0)
  48
  49 commands = {
  50         'exit': exitcmd,
  51         'help': help,
  52         'open': sendcmd(tuerSock, 'open'),
  53         'close': sendcmd(tuerSock, 'close'),
  54         'buzz': sendcmd(tuerSock, 'buzz'),
  55 }
  56
  57 # input loop
  58 print("Welcome to tyshell. Use help to see what you can do.")
  59 while True:
  60         try:
  61                 command = input("$ ")
  62         except EOFError:
  63                 print()
  64                 break
  65         command = shlex.split(command)
  66         if not len(command): continue
  67         # execute command
  68         if command[0] in commands:
  69                 try:
  70                         commands[command[0]](command)
  71                 except Exception as e:
  72                         print("Error while executing %s: %s" % (command[0], str(e)))
  73         else:
  74                 print("Command %s not found. Use help." % command[0])
  75