harvey/rc/bin/usbfat:

#!/bin/rc
# usbfat: [disk [mtpt]] - mount a USB disk's MS FAT file system
rfork e
disk = ()
mtpt = /n/usb

test -e /dev/usb || bind -a '#u' /dev || {
	echo no '#u/usb' >[1=2]
	exit nousb
}
test -e /dev/usbdctl || mount -a /srv/usb /dev || {
	echo cannot mount /srv/usb >[1=2]
	exit nousbd
}

disks=()
mtpt=()
switch ($#*) {
case 0
	;
case 1
	disks = $1
case 2
	disks = $1
	mtpt = $2
case *
	echo usage: $0 ' [disk [mtpt]]' >[1=2]
	exit usage
}

if (~ $#disks 0){
	if(! test -e /dev/sdU*/data){
		echo no usb disks >[1=2]
		exit nodisk
	}
	disks = `{echo /dev/sdU*/data}
}
for(d in $disks){
	if(~ $d sdU*.[0-9]*)
		d=/dev/$d/data
	if(test -e $d){
		name=`{echo $d | sed 's/.*(sdU[0-9]+\.[0-9]+).*/\1/'}
		if(~ $#mtpt 0)
			mnt=/n/$name
		if not
			mnt=$mtpt
		# don't mount it if it seems to be already mounted.
		if(! test -e $mnt/*)
		if(grep -s geometry /dev/$name/ctl){
			blk = `{disk/fdisk -p $d | awk '/^part dos / {print $3}'}
			if (! ~ $#blk 0 &&  ~ $blk [0-9]*)
				d=$d:$blk
			mount -c <{dossrv -sf $d >[2]/dev/null} $mnt && echo $mnt
		}
	}
	if not
		echo $d does not exist
}
exit ''