import sys
import subprocess
import socket
+import pwd
+import grp
+import traceback
+from collections import namedtuple
tuerSock = "/run/tuer.sock"
# available commands
def helpcmd(c):
- print("Available commands: %s" % ", ".join(sorted(commands.keys())))
+ 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):
def sendcmd(addr, cmd):
def run(c):
- print("Running %s..." % (cmd))
+ print("206 Sending command %s..." % (cmd))
s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
s.connect(addr)
- s.settimeout(10.0)
+ s.settimeout(60.0)
s.send(cmd.encode())
- data = s.recv(4)
+ data = s.recv(256)
s.close()
print(data.decode('utf-8'))
return run
print("Bye")
return True
-commands = {
- 'exit': exitcmd,
- 'help': helpcmd,
- 'open': sendcmd(tuerSock, 'open'),
- 'close': sendcmd(tuerSock, 'close'),
- 'buzz': sendcmd(tuerSock, 'buzz'),
-}
+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'),
+ 'unlock': 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
+ 'open': 'unlock',
+})
+
+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.")
if command[0] in commands: # needed in case a complete command is a prefix of another one
cmdoptions = [command[0]]
else:
- cmdoptions = list(filter(lambda x: command[0].startswith(x), commands.keys()))
+ 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]](command)
+ res = commands[cmdoptions[0]].function(command)
if res: break
except Exception as e:
print("Error while executing %s: %s" % (command[0], str(e)))
+ #print(traceback.format_exc())
else: # multiple commands fit the prefix
print("Ambiguous command prefix, please choose one of the following:")
print("\t", " ".join(cmdoptions))