To

#!/bin/sh

set -e

if [ "$1" = "-h" ] && [ "$2" = "" ]; then
	p=`basename $0`
	cat <<EOF
NAME
	$p

SYNOPSYS
	$p [-h]
	$p [-c] [-a|id|pattern]

DESCRIPTION
	$p redirects stdin/stdout to the first window pointed by
	[-a|id|pattern]. We default to -a (+Buffer file).

	If there's no buffer to write to, act as a cat(1).

	If -c is specified, then the output buffer is cleared.

EXAMPLES
	# Display stat(1)'s output for current buffer in +Buffer,
	# creating it if necessary.
	(tagline)\$ stat \$% | To
EOF
	exit 0
fi

clear=
if [ "$1" == "-c" ]; then clear=1; shift; fi

if [ -z "$1" ]; then set -- -a; fi

id=`Getids $1 | sed 1q`

# Reasonable default
if [ -z "$id" ]; then
	exec cat
fi

if [ -n "$clear" ]; then
	echo -n , | 9p write acme/$id/addr
fi
exec 9p write acme/$id/data