plan9fox/rc/bin/diskparts

#!/bin/rc
rfork e

# note that really big disks (e.g., aoe devices) may have no mbr
# partition table because the mbr partition table can't cope with large
# block numbers, so we may have to examine the data file with prep if
# there's no plan9 file.  beware that `disk/prep -p data' on a disk with
# no plan 9 partition table will delete all extant partitions.
fn setup {
	if(test -f $1/data && test -f $1/ctl)
		{@{disk/edisk -p $1/data
		|| disk/fdisk -p $1/data} |
			grep -v '^delpart ' >$1/ctl } >[2]/dev/null
	if(test -f $1/plan9)
		parts=($1/plan9*)
	if not
		parts=($1/data)
	for(part in $parts)
		if(test -f $part)
			 { disk/prep -p $part |
				grep -v '^delpart ' >$1/ctl } >[2]/dev/null
}

if(~ $#* 0){
	# set up any disk partitions
	if (! test -e /dev/sdctl)
		bind -b '#S' /dev
	for(disk in /dev/sd*) {
		setup $disk
	}
	sysname=`{cat /dev/sysname}
	# set up any fs(3) partitions
	if (! test -e /dev/fs/ctl && test -e '#k/fs')
		bind -b '#k' /dev
	if (~ $#sysname 1 && ! ~ $sysname '' &&
	  test -r /cfg/$sysname/fsconfig && test -w /dev/fs/ctl)
		awk '{print $0; fflush}' /cfg/$sysname/fsconfig >/dev/fs/ctl
}
if not {
	for(disk) {
		setup $disk
	}
}