harvey/rc/bin/usbfat:

#!/bin/rc
# usbfat: [-fl] [disk [mtpt]] - mount a USB disk's MS FAT file system
rfork e
opts=()
while (! ~ $#* 0 && ~ $1 -*) {
	switch ($1) {
	case -f -l -lf -fl
		opts=($opts $1)
	case -*
		echo usage: $0 '[-fl] [disk [mtpt]]' >[1=2]
		exit usage
	}
	shift
}
disk = /n/disk/0/data
mtpt = /n/usb

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

if (! test -f /srv/usbfat.$user) {
	if (! test -e $disk)
		usb/disk $opts || exit 'no disk'
	blk = `{disk/fdisk -p $disk | awk '/^part dos / {print $3}'}
	if (~ $#blk 0 || ! ~ $blk [0-9]*) {
		echo $0: warning: no fdisk dos partition found... >[1=2]
		dossrv -f $disk usbfat.$user || exit dossrv
	}
	if not
		dossrv -f $disk:$blk usbfat.$user || exit dossrv
}
mount -c /srv/usbfat.$user $mtpt