Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!csd4.milw.wisc.edu!bbn!apple!well!dansmith
From: dansmith@well.UUCP (Dan "Bucko" Smith)
Newsgroups: comp.unix.questions
Subject: Re: SYSV version of \"grabchars.c\".
Keywords: shell script GNU head stty
Message-ID: <11577@well.UUCP>
Date: 9 May 89 01:58:58 GMT
References: <19462@adm.BRL.MIL> <1201@aplcen.apl.jhu.edu>
Reply-To: dansmith@well.UUCP (Dan "Bucko" Smith)
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 28

>I would expect that GNU head could be used the same way.  Multi-sequence
>keys would fool it (such as function keys) -- does grabchars handle this?
>Is there a better way yet (in shell)?
>
>					-- Greg Ubben
>					   bink@aplcen.apl.jhu.edu


	Grabchars could be tought about function keys, that isn't
supported yet.  What it can do now is:

	timeout after a given number of seconds 
	allow only a given set of characters (using regular expressions)
		(filter for numbers only, alpha only, etc.)
	take in (up to) a given number of characters
	a default character can be returned if RETURN is hit
	map lower->upper, upper->lower case
	flush or not flush previous input (kill or don't kill typeahead)
	echo or not echo characters typed to stdout and/or stderr
		(for setting variables in shell scripts)
	etc... these all work together now.

				dan
-- 
                         Dan "Bucko" Smith
     well!dansmith  unicom!daniel@pacbell.com  daniel@island.uu.net
ph: (415) 332 3278 (h), 258 2176 (w) disclaimer: Island's coffee was laced :-)
My mind likes Cyberstuff, my eyes films, my hands guitar, my feet skiing...