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resize_disklabel revision 1.1 
      1 #!/bin/sh
      2 #
      3 # $NetBSD: resize_disklabel,v 1.1 2015/04/06 20:19:28 jmcneill Exp $
      4 #
      5 
      6 # PROVIDE: resize_disklabel
      7 # REQUIRE: fsck_root
      8 # BEFORE: resize_root
      9 
     10 $_rc_subr_loaded . /etc/rc.subr
     11 
     12 name="resize_disklabel"
     13 rcvar=$name
     14 start_cmd="resize_disklabel_start"
     15 stop_cmd=":"
     16 
     17 get_rawpart()
     18 {
     19 	partno=$(/sbin/sysctl -n kern.rawpartition)
     20 	test $partno = 2 && echo c || echo d
     21 }
     22 
     23 get_total_sectors()
     24 {
     25 	disk=$1
     26 	/sbin/drvctl -p $disk disk-info/geometry/sectors-per-unit
     27 }
     28 
     29 get_rawpart_sectors()
     30 {
     31 	disk=$1
     32 	rawpart=$2
     33 	/sbin/disklabel $disk | grep "^ $rawpart:" | awk '{ print $2; }'
     34 }
     35 
     36 grow_disklabel()
     37 {
     38 	disk=$1
     39 	part=$2
     40 	rawpart=$(get_rawpart)
     41 
     42 	ts=$(get_total_sectors $disk)
     43 	rs=$(get_rawpart_sectors $disk $rawpart)
     44 
     45 	if [ "$ts" = "$rs" ]; then
     46 		return
     47 	fi
     48 
     49 	oldsize=$(($rs * 512 / 1024 / 1024))
     50 	newsize=$(($ts * 512 / 1024 / 1024))
     51 	echo "Growing $disk disklabel (${oldsize}MB -> ${newsize}MB)"
     52 	printf "A\ny\n$part\n\n\n\$\nc\n\n\n\$\nd\n\n\n\$\nW\ny\nQ\n" | \
     53 	    disklabel -i $disk >/dev/null
     54 }
     55 
     56 resize_disklabel_start()
     57 {
     58 	if [ x"${resize_disklabel_disk}" = "x" ]; then
     59 		warn "\${resize_disklabel_disk} is not set, not resizing disklabel"
     60 		return
     61 	fi
     62 	if [ x"${resize_disklabel_part}" = "x" ]; then
     63 		warn "\${resize_disklabel_part} is not set, not resizing disklabel"
     64 		return
     65 	fi
     66 
     67 	grow_disklabel "${resize_disklabel_disk}" "${resize_disklabel_part}"
     68 }
     69 
     70 load_rc_config $name
     71 run_rc_command "$1"
     72