mkinitramfs

   1 #!/bin/sh
   2
   3 # make sure we are being run in the right directory...
   4 if [ -f mkinitramfs ]
   5 then :
   6 else
   7   echo >&2 mkinitramfs must be run from the mdadm source directory.
   8   exit 1
   9 fi
  10 if [ -f /bin/busybox ]
  11 then : good, it exists
  12   case `file /bin/busybox` in
  13    *statically* ) : good ;;
  14    * ) echo >&2 mkinitramfs: /bin/busybox is not statically linked: cannot proceed.
  15        exit 1
  16   esac
  17 else
  18   echo >&2 "mkinitramfs: /bin/busybox doesn't exist - please install it statically linked."
  19     exit 1
  20 fi
  21
  22 rm -rf initramfs
  23 mkdir initramfs
  24 mkdir initramfs/bin
  25 make mdadm.static
  26 cp mdadm.static initramfs/bin/mdadm
  27 cp /bin/busybox initramfs/bin/busybox
  28 ln initramfs/bin/busybox initramfs/bin/sh
  29 cat <<- END > initramfs/init
  30         #!/bin/sh
  31
  32         echo 'Auto-assembling boot md array'
  33         mkdir /proc
  34         mount -t proc proc /proc
  35         if [ -n "$rootuuid" ]
  36         then arg=--uuid=$rootuuid
  37         elif [ -n "$mdminor" ]
  38         then arg=--super-minor=$mdminor
  39         else arg=--super-minor=0
  40         fi
  41         echo "Using $arg"
  42         mdadm -Acpartitions $arg --auto=part /dev/mda
  43         cd /
  44         mount /dev/mda1 /root ||  mount /dev/mda /root
  45         umount /proc
  46         cd /root
  47         exec chroot . /sbin/init < /dev/console > /dev/console 2>&1
  48 END
  49 chmod +x initramfs/init
  50
  51 (cd initramfs
  52  find init bin | cpio -o -H newc | gzip --best
  53 ) > init.cpio.gz
  54 rm -rf initramfs
  55 ls -l init.cpio.gz
  56
  57