scripts/boot/3010-verify-checksums

   1 #!/bin/sh
   2
   3 #set -e
   4
   5 Verify_checksums ()
   6 {
   7         for _PARAMETER in ${_CMDLINE}
   8         do
   9                 case "${_PARAMETER}" in
  10                         live-boot.verify-checksums|verify-checksums)
  11                                 LIVE_VERIFY_CHECKSUMS="true"
  12                                 ;;
  13                 esac
  14         done
  15
  16         if [ "${LIVE_VERIFY_CHECKSUMS}" != "true" ]
  17         then
  18                 return 0
  19         fi
  20
  21         _MOUNTPOINT="${1}"
  22
  23         _DIGESTS="sha512 sha384 sha256 sha224 sha1 md5"
  24         _TTY="/dev/tty8"
  25
  26         log_begin_msg "Verifying checksums"
  27
  28         cd "${_MOUNTPOINT}"
  29
  30         for _DIGEST in ${_DIGESTS}
  31         do
  32                 _CHECKSUMS="$(echo ${_DIGEST} | tr [a-z] [A-Z])SUMS"
  33
  34                 if [ -e "${_CHECKSUMS}" ]
  35                 then
  36                         echo "Found ${_CHECKSUMS}..." > "${_TTY}"
  37
  38                         if [ -e "/bin/${_DIGEST}sum" ]
  39                         then
  40                                 echo "Checking ${_CHECKSUMS}..." > "${_TTY}"
  41
  42                                 # Verify checksums
  43                                 /bin/${_DIGEST}sum -c "${_CHECKSUMS}" < "${_TTY}" > "${_TTY}"
  44                                 _RETURN="${?}"
  45
  46                                 # Stop after first verification
  47                                 break
  48                         else
  49                                 echo "Not found /bin/${_DIGEST}sum..." > "${_TTY}"
  50                         fi
  51                 fi
  52         done
  53
  54         log_end_msg
  55
  56         case "${_RETURN}" in
  57                 0)
  58                         log_success_msg "Verification successfull, rebooting in 10 seconds."
  59                         sleep 10
  60
  61                         # Unmount live-media
  62                         cd /
  63                         umount -f ${_MOUNTPOINT} > /dev/null 2>&1
  64                         sync
  65
  66                         # Attempt to remount all mounted filesystems read-only
  67                         echo u > /proc/sysrq-trigger
  68
  69                         # Immediately reboot the system without syncing or unmounting filesystems
  70                         echo b > /proc/sysrq-trigger
  71                         ;;
  72
  73                 *)
  74                         panic "Verification failed, $(basename ${_TTY}) for more information."
  75                         ;;
  76         esac
  77 }