1#!/bin/rc 2 3first=`{ls -p '#S' | sed 1q} 4if(! ~ $first $disk) { 5 echo 'warning: The plan 9 partition is not on the boot disk,' 6 echo 'so making it the active partition will have no effect.' 7} 8 9p9offset=`{grep '^part 9fat ' /dev/$disk/ctl |awk '{print $3}'} 10if(! ~ $#p9offset 1) { 11 echo 'could not find plan 9 partition.' 12 echo 'cannot happen' 13 exit bad 14} 15 16if(test $p9offset -gt 4128695) { # 65536 * 63 - 10 17 echo 18 echo 'Your Plan 9 partition is more than 2GB into your disk,' 19 echo 'and the master boot records used by Windows 9x/ME' 20 echo 'cannot access it (and thus cannot boot it).' 21 echo 22 echo 'You can install the Plan 9 master boot record, which can load' 23 echo 'partitions far into the disk.' 24 echo 25} 26 27echo 'If you use the Windows NT/2000/XP master boot record' 28echo 'or a master boot record from a Unix clone (e.g., LILO or' 29echo 'FreeBSD bootmgr), it is probably safe to continue using' 30echo 'that boot record rather than install the Plan 9 boot record.' 31echo 32prompt 'Install the Plan 9 master boot record' y n 33switch($rd) { 34case n 35 ; 36case y 37 disk/mbr -m /386/mbr /dev/$disk/data 38} 39 40log Setting Plan 9 partition active. 41p9part=`{disk/fdisk /dev/$disk/data >[2]/dev/null </dev/null | 42 grep PLAN9 | sed 1q | sed 's/ *(p.) .*/\1/'} 43if(~ $#p9part 0){ 44 echo 'You have no Plan 9 partitions (How could this happen?)' >[1=2] 45 exit 'no plan 9 partition found' 46} 47p9part=$p9part(1) 48{ echo 'A '^$p9part; echo w } | disk/fdisk /dev/$disk/data >[2]/dev/null >/dev/null 49x=$status 50if(~ $x '' '|'){ 51 echo 52 echo 'The Plan 9 partition is now marked as active.' 53 exit '' 54} 55exit $x 56