73940cec58
* util/update-grub_lib.in (prepare_grub_to_access_device): Remove
check for partition that provides /boot/grub. Its logic is flawed,
as it prevents prepare_grub_to_access_device() from being called
multiple times.
159 lines
4 KiB
Text
159 lines
4 KiB
Text
# Helper library for update-grub
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# Copyright (C) 2007,2008 Free Software Foundation, Inc.
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#
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# GRUB is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# GRUB is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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transform="@program_transform_name@"
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prefix=@prefix@
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exec_prefix=@exec_prefix@
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datarootdir=@datarootdir@
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datadir=@datadir@
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sbindir=@sbindir@
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pkgdatadir=${datadir}/`echo @PACKAGE_TARNAME@ | sed "${transform}"`
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grub_probe=${sbindir}/`echo grub-probe | sed ${transform}`
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make_system_path_relative_to_its_root ()
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{
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path=$1
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# abort if file doesn't exist
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if test -e $path ; then : ;else
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return 1
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fi
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# canonicalize
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if path=`readlink -f $path` ; then : ; else
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return 1
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fi
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# if not a directory, climb up to the directory containing it
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if test -d $path ; then
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dir=$path
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else
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dir=`echo $path | sed -e "s,/[^/]*$,,g"`
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fi
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num=`stat -c %d $dir`
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# this loop sets $dir to the root directory of the filesystem we're inspecting
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while : ; do
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parent=`readlink -f $dir/..`
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if [ "x`stat -c %d $parent`" = "x$num" ] ; then : ; else
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# $parent is another filesystem; we found it.
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break
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fi
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if [ "x$dir" = "x/" ] ; then
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# / is our root.
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break
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fi
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dir=$parent
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done
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# This function never prints trailing slashes (so that its output can be
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# appended a slash unconditionally). Each slash in $dir is considered a
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# preceding slash, and therefore the root directory is an empty string.
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if [ "$dir" = "/" ] ; then
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dir=""
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fi
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echo $path | sed -e "s,^$dir,,g"
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}
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is_path_readable_by_grub ()
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{
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path=$1
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# abort if path doesn't exist
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if test -e $path ; then : ;else
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return 1
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fi
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# abort if file is in a filesystem we can't read
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if ${grub_probe} -t fs $path > /dev/null 2>&1 ; then : ; else
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return 1
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fi
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return 0
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}
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convert_system_path_to_grub_path ()
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{
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path=$1
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echo "Warning: convert_system_path_to_grub_path() is deprecated. Use prepare_grub_to_access_device() instead." >&2
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# abort if GRUB can't access the path
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if is_path_readable_by_grub ${path} ; then : ; else
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return 1
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fi
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if drive=`${grub_probe} -t drive $path` ; then : ; else
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return 1
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fi
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if relative_path=`make_system_path_relative_to_its_root $path` ; then : ; else
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return 1
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fi
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echo ${drive}${relative_path}
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}
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prepare_grub_to_access_device ()
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{
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device=$1
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# Abstraction modules aren't auto-loaded.
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abstraction="`${grub_probe} --device ${device} --target=abstraction`"
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if [ "x${abstraction}" = "x" ] ; then : ; else
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echo "insmod ${abstraction}"
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fi
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# If there's a filesystem UUID that GRUB is capable of identifiing, use it;
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# otherwise set root as per value in device.map.
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echo "set root=`${grub_probe} --device ${device} --target=drive`"
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if fs_uuid="`${grub_probe} --device ${device} --target=fs_uuid 2> /dev/null`" ; then
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echo "search --fs-uuid --set ${fs_uuid}"
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fi
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}
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font_path ()
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{
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# Prefer system path for space reasons (/boot/grub might be a very small
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# partition in case of OpenFirmware, etc).
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for dir in ${pkgdatadir} /usr/share/grub /boot/grub ; do
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# Prefer complete fonts over incomplete ones.
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for basename in unicode unifont ascii ; do
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path="${dir}/${basename}.pff"
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if is_path_readable_by_grub ${path} > /dev/null ; then
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echo "${path}"
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return 0
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fi
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done
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done
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return 1
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}
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grub_file_is_not_garbage ()
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{
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if test -f "$1" ; then
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case "$1" in
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*.dpkg-dist|*.dpkg-old|*.dpkg-tmp) return 1 ;; # debian dpkg
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esac
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else
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return 1
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fi
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return 0
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}
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