1#!/bin/sh
2
3# some default sizes
4align=2048
5swapsize=$(expr 1 \* 1024 \* 2048 + 1024)
6zfssize=0
7
8# define our bail out shortcut
9exerr () { echo -e "$*" >&2 ; exit 1; }
10
11usage="Usage: $0 <dsk> [ -s <swap size> ] [ -z <zfs size> ]\n\
12	\tswap size: if no -s size in blocks is given, default is $swapsize blocks\n\
13	\tzfs size: if no -z size in blocks is given, default is the rest of the disk"
14
15dsk=$1
16if [ -z "$dsk" -o \! -c "/dev/$dsk" ]; then
17  exerr ${usage};
18  exit;
19fi
20
21shift; while getopts :s:z: arg; do case ${arg} in
22  s) swapsize=${OPTARG};;
23  z) zfssize=${OPTARG};;                                                                                                               
24  #?) exerr ${usage};;                                                                                                      
25esac; done; shift $(( ${OPTIND} - 1 ))                                                                                                
26 
27gpart destroy -F $dsk
28gpart create -s gpt $dsk
29
30# Boot
31siz=$(expr 1024 \- 34)
32gpart add -i 1 -b 34 -s $siz -t freebsd-boot $dsk
33gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 $dsk
34
35# Swap
36off=$align
37siz=$swapsize
38gpart add -i 2 -b $off -s $siz -t freebsd-swap $dsk
39
40# ZFS
41off=$(expr $align + $swapsize)
42if [ "$zfssize" -gt 0 ]; then
43  siz="-s $zfssize"
44else
45  siz=""
46fi
47gpart add -i 3 -b $off $siz -t freebsd-zfs $dsk
48
49gpart show $dsk
50