debian/patches/07_support_findiso.dpatch

   1 #! /bin/sh /usr/share/dpatch/dpatch-run
   2 ## 07_support_findiso.dpatch by Michael Schierl <schierlm@gmx.de>
   3 ##
   4 ## All lines beginning with `## DP:' are a description of the patch.
   5 ## DP: support for findoiso bootoption
   6 # When booting with findiso=/grml_2010.05.iso, it will look for
   7 # that .iso file on all disks where it usually looks for the .squashfs
   8 # file. When it is found, the disk containing the iso is read-only mounted
   9 # as /live/findiso (and exposed there after boot completed). The squashfs
  10 # file is searched inside that ISO file then.
  11
  12 @DPATCH@
  13 diff --git a/scripts/live b/scripts/live
  14 index 5681362..86a0ce6 100755
  15 --- a/scripts/live
  16 +++ b/scripts/live
  17 @@ -106,6 +106,11 @@ Arguments ()
  18                                 export FETCH
  19                                 ;;
  20
  21 +                       findiso=*)
  22 +                               FINDISO="${ARGUMENT#findiso=}"
  23 +                               export FINDISO
  24 +                               ;;
  25 +
  26                         forcepersistentfsck)
  27                                 FORCEPERSISTENTFSCK="Yes"
  28                                 export FORCEPERSISTENTFSCK
  29 @@ -1629,6 +1634,21 @@ check_dev ()
  30                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
  31                 [ -n "$devuid" ] && echo "$devuid" >> $tried
  32
  33 +               if [ -n "${FINDISO}" ]
  34 +               then
  35 +                       if [ -f ${mountpoint}/${FINDISO} ]
  36 +                       then
  37 +                               umount ${mountpoint}
  38 +                               mkdir /live/findiso -p
  39 +                               mount -t ${fstype} -o ro,noatime "${devname}" /live/findiso
  40 +                               loopdevname=$(setup_loop "/live/findiso/${FINDISO}" "loop" "/sys/block/loop*" 0 "")
  41 +                               devname="${loopdevname}"
  42 +                               mount -t iso9660 -o ro,noatime "${devname}" ${mountpoint}
  43 +                       else
  44 +                               umount ${mountpoint}
  45 +                       fi
  46 +               fi
  47 +
  48                 if is_live_path ${mountpoint} && \
  49                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
  50                 then
  51 @@ -1933,6 +1953,22 @@ mountroot ()
  52         # when booting FAI, this simple workaround solves it
  53         ls /root/* >/dev/null 2>&1
  54
  55 +       # Move findiso directory to the new root filesystem so that programs there can get at it.
  56 +       if [ -d /live/findiso -a ! -d /root/live/findiso ]
  57 +       then
  58 +               mkdir -p /root/live/findiso
  59 +               mount -n --move /live/findiso /root/live/findiso
  60 +       fi
  61 +
  62 +       # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
  63 +       # because the mountpoint is left behind in /proc/mounts, so let's get
  64 +       # rid of it when running from RAM
  65 +       if [ -n "$FINDISO" ] && [ "${TORAM}" ]
  66 +       then
  67 +               losetup -d /dev/loop0
  68 +               grep -q /live/findiso /proc/mounts && umount /root/live/findiso
  69 +       fi
  70 +
  71         # copy snapshot configuration if exists
  72         if [ -f snapshot.conf ]
  73         then