scripts/boot/read-only.sh

   1 #!/bin/sh
   2
   3 #set -e
   4
   5 Read_only ()
   6 {
   7         # Marking some block devices as read-only to ensure that nothing
   8         # gets written as linux still writes to 'only' read-only mounted filesystems.
   9         _DEVICES="/dev/sd* /dev/vd*"
  10
  11         for _DEVICE in ${_DEVICES}
  12         do
  13                 if [ ! -b "${_DEVICE}" ]
  14                 then
  15                         continue
  16                 fi
  17
  18                 echo -n "Setting ${_DEVICE} read-only..." > /dev/console
  19
  20                 blockdev --setro ${_DEVICE}
  21                 _RETURN="${?}"
  22
  23                 case "${_RETURN}" in
  24                         0)
  25                                 echo " done, use 'blockdev --setrw ${_DEVICE}' to set read-write." > /dev/console
  26                                 ;;
  27
  28                         *)
  29                                 echo " failed." > /dev/console
  30                                 ;;
  31                 esac
  32         done
  33 }