examples/functions/fstty

#
# A function that works as a front end for both stty and the `bind'
# builtin, so the tty driver and readline see the same changes
#
#
#  Chet Ramey <chet.ramey@case.edu>
#
#  Copyright 2011 Chester Ramey
#
#   This program is free software; you can redistribute it and/or modify
#   it under the terms of the GNU General Public License as published by
#   the Free Software Foundation; either version 2, or (at your option)
#   any later version.
#
#   TThis program is distributed in the hope that it will be useful,
#   but WITHOUT ANY WARRANTY; without even the implied warranty of
#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#   GNU General Public License for more details.
#
#   You should have received a copy of the GNU General Public License
#   along with this program; if not, write to the Free Software Foundation,
#   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#
# Convert between the stty ^H control character form and the readline \C-H
# form
#
cvt()
{
	echo "$@" | cat -v | sed 's/\^/\\C-/'
}

#
# stty front-end.  Parses the argument list and creates two command strings,
# one for stty, another for bind.
#
fstty()
{
	local	cmd="" bargs=""
	local	e

	while [ $# -gt 0 ]
	do
		case "$1" in
		-a)	cmd="$cmd everything"
			;;
		erase)	shift;
			e=$(cvt "$1")
			cmd="$cmd erase $1"
			bargs="$bargs '\"$e\": backward-delete-char'"
			;;
		kill)	shift
			e=$(cvt "$1")
			cmd="$cmd kill $1"
			bargs="$bargs '\"$e\": unix-line-discard'"
			;;
		werase)	shift;
			e=$(cvt "$1")
			cmd="$cmd erase $1"
			bargs="$bargs '\"$e\": backward-kill-word'"
			;;
		lnext)	shift;
			e=$(cvt "$1")
			cmd="$cmd erase $1"
			bargs="$bargs '\"$e\": quoted-insert'"
			;;
		*)	cmd="$cmd $1"
			;;
		esac
		shift
	done

	command stty $cmd
	if [ -n "$bargs" ]; then
		builtin bind $bargs
	fi
}