transform="@program_transform_name@"
+prefix=@prefix@
+exec_prefix=@exec_prefix@
sbindir=@sbindir@
grub_probe=${sbindir}/`echo grub-probe | sed ${transform}`
-convert_system_path_to_grub_path ()
+make_system_path_relative_to_its_root ()
{
- dir=$1
- # Abort if file doesn't exist
- test -e $dir
- dir=`readlink -f $dir`
+ path=$1
+ # abort if file doesn't exist
+ if test -e $path ; then : ;else
+ return 1
+ fi
- drive=`${grub_probe} -t drive $dir`
- if [ "x$drive" = "x" ] ; then
+ # canonicalize
+ if path=`readlink -f $path` ; then : ; else
return 1
fi
- # Abort if file is in a filesystem we can't read
- ${grub_probe} -t fs $dir > /dev/null 2>&1
+ # 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`
- relative_path=""
+
+ # this loop sets $dir to the root directory of the filesystem we're inspecting
while : ; do
- parent=`echo $dir | sed -e "s,/[^/]*$,,g" -e "s,^$,/,g"`
+ 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
- relative_path=`echo $dir | sed -e "s,^.*/,/,g"`$relative_path
dir=$parent
done
+ echo $path | sed -e "s,^$dir,/,g" -e "s,//,/,g"
+}
+
+convert_system_path_to_grub_path ()
+{
+ path=$1
+
+ # abort if file 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 $path > /dev/null 2>&1 ; then : ; else
+ return 1
+ fi
+
+ if drive=`${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
+
+ # remove any trailing slash, even if that slash is everything we have
+ relative_path=`echo ${relative_path} | sed -e "s,/*$,,g"`
+
echo ${drive}${relative_path}
}