X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/07282bc03a4f1dfcd9309f2fa242dfecb2756a3b..8fa0d3c2b93ded551a61f48e2c8701e5f2370b76:/tyshell

diff --git a/tyshell b/tyshell
index 0bc3aae..b535f2b 100755
--- a/tyshell
+++ b/tyshell
@@ -5,6 +5,10 @@ import shlex
 import sys
 import subprocess
 import socket
+import pwd
+import grp
+import traceback
+from collections import namedtuple
 
 tuerSock = "/run/tuer.sock"
 
@@ -16,11 +20,14 @@ except IOError:
     pass
 import atexit
 atexit.register(readline.write_history_file, histfile)
-atexit.register(print, "Bye")
 
 # 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):
@@ -31,27 +38,65 @@ def extcmd(cmd):
 
 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(60.0)
 		s.send(cmd.encode())
-		data = s.recv(4)
+		while True:
+			data = s.recv(256)
+			if not len(data): break
+			print(data.decode('utf-8'))
 		s.close()
-		print("...done")
-		if data != b'1':
-			print("Received unexpected answer %s" % str(data))
 	return run
 
 def exitcmd(c):
-	sys.exit(0)
+	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
+
+def prompt_sure(f,msg):
+	def run(c):
+		try:
+			command = input("%s Are you sure? (yes/no) > " % msg)
+		except EOFError:
+			print()
+			return
+		if command[0] == 'y':
+			return f(c)
+	return run
+
+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'),
+	'lock': CmdEntry(sendcmd(tuerSock, 'lock'), 'If in fallback mode, try to lock the apartment door. If not in fallback mode, you must use the switch near the 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'),
+	'fallback_mode_on': CmdEntry(prompt_sure(sendcmd(tuerSock, 'fallback_mode_on'),'WARNING: This action will be reported to the admins. Use this only in case of Sphinx hardware failure when you need to ignore erroneous sensor input!'), 'Sets the system in a state where it is less dependent on sensoric input. Use it only when sensors are broken.'),
+	'fallback_mode_off': CmdEntry(prompt_sure(sendcmd(tuerSock, 'fallback_mode_off'),'WARNING: This action will be reported to the admins. Use this only if you have fixed the sensors of the Sphinx or activated fallback mode by accident!'), 'Resets the system to the default state. Use this when you have just repaired the sensors of the Sphinx.'),
+	'status': CmdEntry(sendcmd(tuerSock, 'status'), 'Shows internal state and sensor information.'),
+},{
+	# aliases
+	'open': 'unlock',
+})
 
-commands = {
-	'exit': exitcmd,
-	'help': helpcmd,
-	'open': sendcmd(tuerSock, 'open'),
-	'close': sendcmd(tuerSock, 'close'),
-	'buzz': sendcmd(tuerSock, 'buzz'),
-}
+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.")
@@ -67,15 +112,19 @@ while True:
 	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] == x[:len(command[0])],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:
-			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))
 		# TODO: put current "command[0]" into the shell for the next command, but such that it is deletable with backspace