X-Git-Url: https://git.ralfj.de/saartuer.git/blobdiff_plain/27ea44f35684aeab9a5677bd64892d6de950fb4e..36d7c6cbf03d4096480d14d1b03aa758722251f6:/tyshell

diff --git a/tyshell b/tyshell
index 090403e..c35ec0e 100755
--- a/tyshell
+++ b/tyshell
@@ -5,22 +5,22 @@ import shlex
 import sys
 import subprocess
 import socket
+import pwd
+import grp
 
 tuerSock = "/run/tuer.sock"
 
 # use a histfile
-# FIXME: Why not ".tyshellhist"?
-histfile = os.path.join(os.path.expanduser("~"), ".pyshellhist")
+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)
-atexit.register(print, "Bye")
 
 # available commands
-def help(c):
+def helpcmd(c):
 	print("Available commands: %s" % ", ".join(sorted(commands.keys())))
 
 def extcmd(cmd):
@@ -35,24 +35,43 @@ def sendcmd(addr, cmd):
 		print("Running %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)
+		data = s.recv(256)
 		s.close()
-		print("...done")
-		if data != b'1':
-			print("Received unexpected answer %s" % str(data))
+		print(data.decode('utf-8'))
 	return run
 
 def exitcmd(c):
-	sys.exit(0)
+	print("Bye")
+	return True
 
-commands = {
+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
+
+commands = alias({
 	'exit': exitcmd,
-	'help': help,
-	'open': sendcmd(tuerSock, 'open'),
-	'close': sendcmd(tuerSock, 'close'),
+	'help': helpcmd,
+	'open': sendcmd(tuerSock, 'unlock'),
 	'buzz': sendcmd(tuerSock, 'buzz'),
-}
+	'who': whocmd,
+},{
+	# 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.")
@@ -64,12 +83,22 @@ while True:
 		break
 	command = shlex.split(command)
 	if not len(command): continue
-	# execute command
-	if command[0] in commands:
+	# 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:
-			commands[command[0]](command)
+			res = commands[cmdoptions[0]](command)
+			if res: break
 		except Exception as e:
 			print("Error while executing %s: %s" % (command[0], str(e)))
-	else:
-		print("Command %s not found. Use help." % command[0])
+	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