ref: cfb63eceee23064149992ca27a04c9679d4c2cf0
dir: /fsck/
#!/bin/rc
# usage
# disk/fsck /dev/sdFn/fs
disk=$1
if(~ $#disk '')
exit invalid disk
# get the total number of blocks from the config block
nblocks=`{disk/block $disk 1 | awk '$1 == "nblocks"{ print $2 }'}
# write the free extents to /a/frees
disk/updatefrees $disk <{disk/unused $nblocks <{disk/used $disk}}
# change fsok from 0 to 1
disk/fsok $disk