11 from collections import namedtuple
13 tuerSock = "/run/tuer.sock"
16 histfile = os.path.join(os.path.expanduser("~"), ".tyshellhist")
18 readline.read_history_file(histfile)
22 atexit.register(readline.write_history_file, histfile)
27 print(commands.get(c[1],(None,'Can\'t find help for command %s'%(c[1]))).helpstring)
29 print("Available commands: %s" % ", ".join(sorted(commands.keys())))
30 print("Use 'help command' to get more information on the command 'command'")
34 ret = subprocess.call(cmd)
36 print("Command returned non-zero exit statis %d" % ret)
39 def sendcmd(addr, cmd):
41 print("206 Sending command %s..." % (cmd))
42 s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
48 if not len(data): break
49 print(data.decode('utf-8'))
58 for n in grp.getgrnam("tuer").gr_mem:
60 print (p.pw_name, " - ", p.pw_gecos)
62 def alias (cmds, aliases):
63 for newname, oldname in aliases.items():
64 cmds[newname] = cmds[oldname]
67 CmdEntry = namedtuple('CmdEntry','function helpstring')
70 'exit': CmdEntry(exitcmd, 'Quits this shell'),
71 'help': CmdEntry(helpcmd, 'Helps you getting to know the available commands'),
72 'unlock': CmdEntry(sendcmd(tuerSock, 'unlock'), 'Will try to unlock the apartment door'),
73 'buzz': CmdEntry(sendcmd(tuerSock, 'buzz'), 'Will buzz the buzzer for the street door'),
74 'who': CmdEntry(whocmd, 'Shows the list of people, who are allowed to control this system'),
80 def complete_command(cmd):
81 '''returns a list of commands (as strings) starting with cmd'''
82 return list(filter(lambda x: x.startswith(cmd), commands.keys()))
83 readline.set_completer(lambda cmd, num: (complete_command(cmd)+[None])[num]) # wrap complete_command for readline's weird completer API
84 readline.parse_and_bind("tab: complete") # run completion on tab
87 print("Welcome to tyshell. Use help to see what you can do.")
94 command = shlex.split(command)
95 if not len(command): continue
96 # find suiting commands
97 if command[0] in commands: # needed in case a complete command is a prefix of another one
98 cmdoptions = [command[0]]
100 cmdoptions = complete_command(command[0])
101 # check how many we found
102 if len(cmdoptions) == 0: # no commands fit prefix
103 print("Command %s not found. Use help." % command[0])
104 elif len(cmdoptions) == 1: # exactly one command fits (prefix)
106 res = commands[cmdoptions[0]].function(command)
108 except Exception as e:
109 print("Error while executing %s: %s" % (command[0], str(e)))
110 #print(traceback.format_exc())
111 else: # multiple commands fit the prefix
112 print("Ambiguous command prefix, please choose one of the following:")
113 print("\t", " ".join(cmdoptions))
114 # TODO: put current "command[0]" into the shell for the next command, but such that it is deletable with backspace