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Description: Handle filesystems loop-mounted on file images
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Improve prepare_grub_to_access_device to emit appropriate commands for such
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filesystems, and ignore them in Linux grub.d scripts.
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This is needed for Ubuntu's Wubi installation method.
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This patch isn't inherently Debian/Ubuntu-specific. losetup and
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/proc/mounts are Linux-specific, though, so we might need to refine this
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before sending it upstream. The changes to the Linux grub.d scripts might
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be better handled by integrating 10_lupin properly instead.
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Index: b/util/grub-mkconfig_lib.in
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===================================================================
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--- a/util/grub-mkconfig_lib.in
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+++ b/util/grub-mkconfig_lib.in
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+ /dev/loop/*|/dev/loop[0-9])
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+ loop_file=`losetup "${device}" | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
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+ loop_device="${device}"
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+ device=`"${grub_probe}" --target=device "${loop_file}"`
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if dmsetup status $device 2>/dev/null | grep -q 'crypt[[:space:]]$'; then
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"$device is a crypto device, which GRUB cannot read directly. Some" \
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if fs_uuid="`"${grub_probe}" --device "${device}" --target=fs_uuid 2> /dev/null`" ; then
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echo "search --no-floppy --fs-uuid --set=root ${fs_uuid}"
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+ if [ "x${loop_file}" != x ]; then
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+ loop_mountpoint="$(awk '"'${loop_file}'" ~ "^"$2 && $2 != "/" { print $2 }' /proc/mounts | tail -n1)"
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+ if [ "x${loop_mountpoint}" != x ]; then
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+ echo "loopback loop0 ${loop_file#$loop_mountpoint}"
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+ echo "set root=(loop0)"
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grub_file_is_not_garbage ()
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Index: b/util/grub.d/10_linux.in
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===================================================================
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--- a/util/grub.d/10_linux.in
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+++ b/util/grub.d/10_linux.in
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case ${GRUB_DEVICE} in
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/dev/loop/*|/dev/loop[0-9])
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GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
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+ # We can't cope with devices loop-mounted from files here.
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+ case ${GRUB_DEVICE} in
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Index: b/util/grub.d/20_linux_xen.in
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===================================================================
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--- a/util/grub.d/20_linux_xen.in
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+++ b/util/grub.d/20_linux_xen.in
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case ${GRUB_DEVICE} in
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/dev/loop/*|/dev/loop[0-9])
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GRUB_DEVICE=`losetup ${GRUB_DEVICE} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
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+ # We can't cope with devices loop-mounted from files here.
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+ case ${GRUB_DEVICE} in
added
removed
debian/patches/mkconfig_loopback.patch
