share/initrd/rcmount_crypt

   1 #!/bin/sh
   2
   3 if [ ! -x /sbin/cryptsetup ]; then
   4         return 1;
   5 fi
   6
   7 FSTYPE=$2
   8 MOUNTFROM=$3
   9 VOLUME=$4
  10 OPTIONS=$5
  11
  12 # Make sure that MOUNTFROM starts with /dev/
  13 substr="${MOUNTFROM##/dev/}"
  14 if [ "$substr" = "$MOUNTFROM" ]; then
  15         MOUNTFROM="/dev/$MOUNTFROM"
  16 fi
  17
  18 # Check if the volume is really a luks volume
  19 /sbin/cryptsetup isLuks $MOUNTFROM
  20 if [ "$?" -ne "0" ]; then
  21         return 1;
  22 fi
  23
  24 # Open crypto volume
  25 /sbin/cryptsetup $OPTIONS luksOpen $MOUNTFROM $VOLUME
  26 if [ "$?" -ne "0" ]; then
  27         return 2;
  28 fi
  29
  30 # Mount, as is expected, onto /new_root
  31 mount -o ro -t $FSTYPE /dev/mapper/$VOLUME /new_root
  32 if [ "$?" -ne "0" ]; then
  33         return 3;
  34 fi