plan9fox/rc/bin/rexport

#!/bin/rc
rfork e

argv0=$0
fn usage {
	echo 'usage:' $argv0 '[-abcCnq] [-s remotename] [-m remotemtpt] [-u user] [-k keypattern] [-P patternfile] [-p] [-t timeout] tree host [remotecmd [args ...]]' >[1=2]
	exit 'usage'
}

fn domount {
	if(~ $#sname 1){
		rm -f /srv/$sname
		echo -n 0 >/srv/$sname
	}
	~ $#mtpt 0 || mount -n $mopt /fd/0 $mtpt || exit
	~ $#cmd 0 || service=import exec $cmd </dev/null >/dev/null >[2=1]
}

sname=()
mopt=()
mtpt=()
exportfs=/bin/exportfs
connect=/bin/rconnect

while(~ $1 -*){
	switch($1){
	case -p; connect=($connect $1)
	case -[abcCnq]*; mopt=($mopt $1)
	case *
		~ $#* 1 && usage
		switch($1){
		case -P; exportfs=($exportfs $1 $2)
		case -[ukt]; connect=($connect $1 $2)
		case -s; sname=`{basename $2}
		case -m; mtpt=$2
		case *; usage
		}
		shift
	}
	shift
}
~ $#* 0 1 && usage

exportfs=($exportfs -r $1)
shift
host=$1
shift
cmd=$*

fn pvar {
	while(! ~ $#* 0){
		~ $#$1 0 || path=/dev/null builtin whatis $1
		shift
	}
}

exec $connect $host <{pvar sname mtpt mopt cmd; builtin whatis domount; echo domount} exec $exportfs