#!/bin/rc
# Given remote mount path (or cwd), tell the best cpu to run commands on.
#
# To publish: cp $% /n/sources/contrib/yk/lab/unix9/

rfork e

fn winprefix { </mnt/acme/$winid/tag sed 's! .*!!; s!/[^/]+$!!; 1q' }

if(~ $#* 1)
	dir = $1
if not {
	if(! ~ $#winid 0 && ! ~ $winid '')
		dir = `{winprefix}
	if(~ $#dir 0 || ~ $dir '')
		dir = `{pwd}
}

if(! ~ $dir /n/*)
	exit 'not remote'

mnt = `{echo $dir | sed 's!^(/n/[^/]*).*!\1!'}
if(remote = `{cat $mnt/etc/hostname >[2]/dev/null}) {
	if(ruser = `{
		ls -ld $mnt/proc/self |
		sed 's/^[^ ]+ [^ ]+ [^ ]+ ([^ ]+) .*/\1/'
	})
		echo $ruser@$remote
	if not
		echo $remote
	exit
}
remote = `{basename $mnt}
if(! ~ $remote local remote other sources) {
	echo $remote
	exit
}

exit 'unknown'