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#!/bin/rc
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first=`{ls -p '#S' | sed 1q}
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if(! ~ $first $disk) {
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echo 'warning: The plan 9 partition is not on the boot disk,'
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echo 'so making it the active partition will have no effect.'
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}
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p9offset=`{grep '^part 9fat ' /dev/$disk/ctl |awk '{print $3}'}
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if(! ~ $#p9offset 1) {
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echo 'could not find plan 9 partition.'
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echo 'cannot happen'
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exit bad
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}
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if(test $p9offset -gt 4128695) { # 65536 * 63 - 10
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echo
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echo 'Your Plan 9 partition is more than 2GB into your disk,'
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echo 'and the master boot records used by Windows 9x/ME'
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echo 'cannot access it (and thus cannot boot it).'
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echo
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echo 'You can install the Plan 9 master boot record, which can load'
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echo 'partitions far into the disk.'
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echo
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}
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echo 'If you use the Windows NT/2000/XP master boot record'
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echo 'or a master boot record from a Unix clone (e.g., LILO or'
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echo 'FreeBSD bootmgr), it is probably safe to continue using'
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echo 'that boot record rather than install the Plan 9 boot record.'
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echo
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prompt 'Install the Plan 9 master boot record' y n
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switch($rd) {
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case n
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;
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case y
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disk/mbr -m /386/mbr /dev/$disk/data
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}
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log Setting Plan 9 partition active.
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p9part=`{disk/fdisk /dev/$disk/data >[2]/dev/null </dev/null |
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grep PLAN9 | sed 1q | sed 's/ *(p.) .*/\1/'}
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if(~ $#p9part 0){
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echo 'You have no Plan 9 partitions (How could this happen?)' >[1=2]
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exit 'no plan 9 partition found'
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}
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p9part=$p9part(1)
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{ echo 'A '^$p9part; echo w } | disk/fdisk /dev/$disk/data >[2]/dev/null >/dev/null
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x=$status
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if(~ $x '' '|'){
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echo
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echo 'The Plan 9 partition is now marked as active.'
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exit ''
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}
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exit $x
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