plan9fox/rc/bin/window

#!/bin/rc
# window [many options] cmd [arg...] - create new window and run cmd in it
rfork e

cmd=()
spec=()
wdir=()
wpid=()
mflag=()
xflag=()
argv0=$0

if(~ $1 *[0-9][' ,'][0-9]*){
	# old syntax: '100 100 200 200' or '100,100,200,200'
	spec=(-r `{echo $1 | sed 's/,/ /g'})
	shift
	mflag=1
}
if not {
	while(~ $1 -* && ~ $#xflag 0)
		switch($1){
		case -hide -scroll -noscroll
			spec=($spec $1)
			shift
		case -dx -dy -minx -miny -maxx -maxy
			spec=($spec $1 $2)
			shift 2
		case -r
			spec=($spec $1 $2 $3 $4 $5)
			shift 5
		case -cd
			wdir=$2
			shift 2
		case -pid
			wpid=$2
			shift 2
		case -m
			mflag=1
			shift
		case -x
			xflag=1
			shift
		case *
			echo usage: $argv0 '[ -m ] [ -r minx miny maxx maxy ]' \
			'[ -dx n ] [ -dy n ] [ -minx n ] [ -miny n ] [ -maxx n ] [ -maxy n ]' \
			'[ -cd dir ] [ -hide ] [ -scroll ] [ -noscroll ] [ cmd arg ... ]' >[1=2]
			exit usage
		}
}

if(~ $#* 0) cmd=rc
if not cmd=$*

if(~ $#xflag 1){
	echo -n `{basename $cmd(1)} >/dev/label >[2]/dev/null
	rm -f /env/^(cmd spec wdir wpid mflag xflag argv0)
	exec $cmd
	exit exec
}

if(~ $#mflag 1) {
	if(~ $wsys ''){
		echo $argv0: '$wsys' not defined >[1=2]
		exit bad
	}

	{
		rfork n

		if(~ $wsys /srv/*){
			if(~ $#wpid 0)
				wpid=`{cat /dev/ppid}
			spec=($spec -pid $wpid)
		}
		if(~ $#wdir 0){
			wdir=`{pwd}
		}
		if not {
			builtin cd $wdir
		}
		spec=($spec -cd $wdir)

		{unmount /mnt/acme /dev; unmount $wsys /dev} >[2]/dev/null
		if(mount $wsys /mnt/wsys 'new '$"spec){
			bind -b /mnt/wsys /dev
			exec $argv0 -x $cmd </dev/cons >/dev/cons >[2]/dev/cons
		}
	}&
	exit ''
}
if not {
	if(~ $wctl ''){
		if(test -f /dev/wctl) wctl=/dev/wctl
		if not if(test -f /mnt/term/dev/wctl) wctl=/mnt/term/dev/wctl
		if not if(test -r /mnt/term/env/wctl) wctl=/mnt/term^`{cat /mnt/term/env/wctl}
		if not {
			echo $argv0: '$wctl' not defined >[1=2]
			exit bad
		}
	}

	if(! ~ $#wdir 0)
		spec=($spec -cd $wdir)
	echo new $spec $argv0 -x $cmd >>$wctl
}