+++ /dev/null
-#!/usr/bin/python3
-import os
-import readline
-import shlex
-import sys
-import subprocess
-import socket
-import pwd
-import grp
-from collections import namedtuple
-
-tuerSock = "/run/tuer.sock"
-
-# use a histfile
-histfile = os.path.join(os.path.expanduser("~"), ".tyshellhist")
-try:
- readline.read_history_file(histfile)
-except IOError:
- pass
-import atexit
-atexit.register(readline.write_history_file, histfile)
-
-# available commands
-def helpcmd(c):
- if (len(c) > 1):
- print(commands.get(c[1],(None,'Can\'t find help for command %s'%(c[1]))).helpstring)
- else:
- print("Available commands: %s" % ", ".join(sorted(commands.keys())))
- print("Use 'help command' to get more information on the command 'command'")
-
-def extcmd(cmd):
- def run(c):
- ret = subprocess.call(cmd)
- if ret != 0:
- print("Command returned non-zero exit statis %d" % ret)
- return run
-
-def sendcmd(addr, cmd):
- def run(c):
- print("206 Sending command %s..." % (cmd))
- s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
- s.connect(addr)
- s.settimeout(60.0)
- s.send(cmd.encode())
- data = s.recv(256)
- s.close()
- print(data.decode('utf-8'))
- return run
-
-def exitcmd(c):
- print("Bye")
- return True
-
-def whocmd(c):
- for n in grp.getgrnam("tuer").gr_mem:
- p = pwd.getpwnam(n)
- print (p.pw_name, " - ", p.pw_gecos)
-
-def alias (cmds, aliases):
- for newname, oldname in aliases.items():
- cmds[newname] = cmds[oldname]
- return cmds
-
-CmdEntry = namedtuple('CmdEntry','function helpstring')
-
-commands = alias({
- 'exit': CmdEntry(exitcmd, 'Quits this shell'),
- 'help': CmdEntry(helpcmd, 'Helps you getting to know the available commands'),
- 'open': CmdEntry(sendcmd(tuerSock, 'unlock'), 'Will try to unlock the apartment door'),
- 'buzz': CmdEntry(sendcmd(tuerSock, 'buzz'), 'Will buzz the buzzer for the street door'),
- 'who': CmdEntry(whocmd, 'Shows the list of people, who are allowed to control this system'),
-},{
- # aliases
- 'unlock': 'open',
-})
-
-def complete_command(cmd):
- '''returns a list of commands (as strings) starting with cmd'''
- return list(filter(lambda x: x.startswith(cmd), commands.keys()))
-readline.set_completer(lambda cmd, num: (complete_command(cmd)+[None])[num]) # wrap complete_command for readline's weird completer API
-readline.parse_and_bind("tab: complete") # run completion on tab
-
-# input loop
-print("Welcome to tyshell. Use help to see what you can do.")
-while True:
- try:
- command = input("$ ")
- except EOFError:
- print()
- break
- command = shlex.split(command)
- if not len(command): continue
- # find suiting commands
- if command[0] in commands: # needed in case a complete command is a prefix of another one
- cmdoptions = [command[0]]
- else:
- cmdoptions = complete_command(command[0])
- # check how many we found
- if len(cmdoptions) == 0: # no commands fit prefix
- print("Command %s not found. Use help." % command[0])
- elif len(cmdoptions) == 1: # exactly one command fits (prefix)
- try:
- res = commands[cmdoptions[0]].function(command)
- if res: break
- except Exception as e:
- print("Error while executing %s: %s" % (command[0], str(e)))
- else: # multiple commands fit the prefix
- print("Ambiguous command prefix, please choose one of the following:")
- print("\t", " ".join(cmdoptions))
- # TODO: put current "command[0]" into the shell for the next command, but such that it is deletable with backspace
-
projects / saartuer.git / blobdiff