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- # Helper library for grub-mkconfig
- # Copyright (C) 2007,2008,2009 Free Software Foundation, Inc.
- #
- # GRUB is free software: you can redistribute it and/or modify
- # it under the terms of the GNU General Public License as published by
- # the Free Software Foundation, either version 3 of the License, or
- # (at your option) any later version.
- #
- # GRUB is distributed in the hope that it will be useful,
- # but WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- # GNU General Public License for more details.
- #
- # You should have received a copy of the GNU General Public License
- # along with GRUB. If not, see <http://www.gnu.org/licenses/>.
-
- transform="s,x,x,"
-
- prefix=/usr
- exec_prefix=${prefix}
- datarootdir=${prefix}/share
- datadir=${datarootdir}
- sbindir=${exec_prefix}/sbin
- pkgdatadir=${datadir}/`echo grub | sed "${transform}"`
-
- grub_probe=${sbindir}/`echo grub-probe | sed ${transform}`
-
- grub_warn ()
- {
- echo "Warning: $@" >&2
- }
-
- make_system_path_relative_to_its_root ()
- {
- path=$1
- # abort if file doesn't exist
- if test -e $path ; then : ;else
- return 1
- fi
-
- # canonicalize
- if path=`readlink -f $path` ; then : ; else
- return 1
- fi
-
- # if not a directory, climb up to the directory containing it
- if test -d $path ; then
- dir=$path
- else
- dir=`echo $path | sed -e "s,/[^/]*$,,g"`
- fi
-
- num=`stat -c %d $dir`
-
- # this loop sets $dir to the root directory of the filesystem we're inspecting
- while : ; do
- parent=`readlink -f $dir/..`
- if [ "x`stat -c %d $parent`" = "x$num" ] ; then : ; else
- # $parent is another filesystem; we found it.
- break
- fi
- if [ "x$dir" = "x/" ] ; then
- # / is our root.
- break
- fi
- dir=$parent
- done
-
- # This function never prints trailing slashes (so that its output can be
- # appended a slash unconditionally). Each slash in $dir is considered a
- # preceding slash, and therefore the root directory is an empty string.
- if [ "$dir" = "/" ] ; then
- dir=""
- fi
-
- # XXX: This fails if $dir contains ','.
- path=`echo "$path" | sed -e "s,^$dir,,g"` || return 1
-
- case "`uname 2>/dev/null`" in
- CYGWIN*)
- # Cygwin: Check if regular or emulated mount.
- if [ -z "$dir" ] || [ "`stat -c %D "$dir/.."`" != 620000 ] ; then
- # Reached some mount point not below /cygdrive.
- # GRUB does not know Cygwin's emulated mounts,
- # convert to Win32 path and remove drive letter.
- path=`cygpath -m "$path" | sed -n 's,^[A-Za-z]:,,p'`
- test ! -z "$path" || return 1
- fi ;;
- esac
-
- echo "$path"
- }
-
- is_path_readable_by_grub ()
- {
- path=$1
-
- # abort if path doesn't exist
- if test -e $path ; then : ;else
- return 1
- fi
-
- # abort if file is in a filesystem we can't read
- if ${grub_probe} -t fs $path > /dev/null 2>&1 ; then : ; else
- return 1
- fi
-
- return 0
- }
-
- convert_system_path_to_grub_path ()
- {
- path=$1
-
- grub_warn "convert_system_path_to_grub_path() is deprecated. Use prepare_grub_to_access_device() instead."
-
- # abort if GRUB can't access the path
- if is_path_readable_by_grub ${path} ; then : ; else
- return 1
- fi
-
- if drive=`${grub_probe} -t drive $path` ; then : ; else
- return 1
- fi
-
- if relative_path=`make_system_path_relative_to_its_root $path` ; then : ; else
- return 1
- fi
-
- echo ${drive}${relative_path}
- }
-
- save_default_entry ()
- {
- if [ "x${GRUB_DEFAULT}" = "xsaved" ] ; then
- echo 'saved_entry=${chosen}'
- echo 'save_env saved_entry'
- fi
- }
-
- prepare_grub_to_access_device ()
- {
- device=$1
-
- loop_file=
- case ${device} in
- /dev/loop/*|/dev/loop[0-9])
- loop_file=`losetup ${device} | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/"`
- case $loop_file in
- /dev/*) ;;
- *)
- loop_device=${device}
- device=`${grub_probe} --target=device "${loop_file}"`
- ;;
- esac
- ;;
- esac
-
- # Abstraction modules aren't auto-loaded.
- abstraction="`${grub_probe} --device ${device} --target=abstraction`"
- for module in ${abstraction} ; do
- echo "insmod ${module}"
- done
-
- fs="`${grub_probe} --device ${device} --target=fs`"
- for module in ${fs} ; do
- echo "insmod ${module}"
- done
-
- # If there's a filesystem UUID that GRUB is capable of identifying, use it;
- # otherwise set root as per value in device.map.
- echo "set root=`${grub_probe} --device ${device} --target=drive`"
- if fs_uuid="`${grub_probe} --device ${device} --target=fs_uuid 2> /dev/null`" ; then
- echo "search --no-floppy --fs-uuid --set ${fs_uuid}"
- fi
-
- if [ "x${loop_file}" != x ]; then
- loop_mountpoint="$(awk '"'${loop_file}'" ~ "^"$2 && $2 != "/" { print $2 }' /proc/mounts | tail -n1)"
- if [ "x${loop_mountpoint}" != x ]; then
- echo "loopback loop0 ${loop_file#$loop_mountpoint}"
- echo "set root=(loop0)"
- fi
- fi
- }
-
- grub_file_is_not_garbage ()
- {
- if test -f "$1" ; then
- case "$1" in
- *.dpkg-*) return 1 ;; # debian dpkg
- esac
- else
- return 1
- fi
- return 0
- }
-
- version_test_numeric ()
- {
- local a=$1
- local cmp=$2
- local b=$3
- if [ "$a" = "$b" ] ; then
- case $cmp in
- ge|eq|le) return 0 ;;
- gt|lt) return 1 ;;
- esac
- fi
- if [ "$cmp" = "lt" ] ; then
- c=$a
- a=$b
- b=$c
- fi
- if (echo $a ; echo $b) | sort -n | head -n 1 | grep -qx $b ; then
- return 0
- else
- return 1
- fi
- }
-
- version_test_gt ()
- {
- local a=`echo $1 | sed -e "s/[^-]*-//;s/[._-]\(pre\|rc\|test\|git\|old\)/~\1/g"`
- local b=`echo $2 | sed -e "s/[^-]*-//;s/[._-]\(pre\|rc\|test\|git\|old\)/~\1/g"`
- local cmp=gt
- if [ "x$b" = "x" ] ; then
- return 0
- fi
- case $a:$b in
- *.old:*.old) ;;
- *.old:*) a=`echo -n $a | sed -e s/\.old$//` ; cmp=gt ;;
- *:*.old) b=`echo -n $b | sed -e s/\.old$//` ; cmp=ge ;;
- esac
- dpkg --compare-versions "$a" $cmp "$b"
- return $?
- }
-
- version_find_latest ()
- {
- local a=""
- for i in $@ ; do
- if version_test_gt "$i" "$a" ; then
- a="$i"
- fi
- done
- echo "$a"
- }
-