util/grub-mkconfig_lib.in

   1 # Helper library for grub-mkconfig
   2 # Copyright (C) 2007,2008,2009,2010  Free Software Foundation, Inc.
   3 #
   4 # GRUB is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # GRUB is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 transform="@program_transform_name@"
  18
  19 prefix=@prefix@
  20 exec_prefix=@exec_prefix@
  21 datarootdir=@datarootdir@
  22 datadir=@datadir@
  23 bindir=@bindir@
  24 sbindir=@sbindir@
  25 pkgdatadir=${datadir}/`echo @PACKAGE_TARNAME@ | sed "${transform}"`
  26
  27 if test "x$grub_probe" = x; then
  28   grub_probe=${sbindir}/`echo grub-probe | sed ${transform}`
  29 fi
  30 if test "x$grub_mkrelpath" = x; then
  31   grub_mkrelpath=${bindir}/`echo grub-mkrelpath | sed ${transform}`
  32 fi
  33
  34 if $(which gettext >/dev/null 2>/dev/null) ; then
  35   gettext="gettext"
  36 else
  37   gettext="echo"
  38 fi
  39
  40 grub_warn ()
  41 {
  42   echo "Warning: $@" >&2
  43 }
  44
  45 make_system_path_relative_to_its_root ()
  46 {
  47   ${grub_mkrelpath} $1
  48 }
  49
  50 is_path_readable_by_grub ()
  51 {
  52   path=$1
  53
  54   # abort if path doesn't exist
  55   if test -e $path ; then : ;else
  56     return 1
  57   fi
  58
  59   # abort if file is in a filesystem we can't read
  60   if ${grub_probe} -t fs $path > /dev/null 2>&1 ; then : ; else
  61     return 1
  62   fi
  63
  64   return 0
  65 }
  66
  67 convert_system_path_to_grub_path ()
  68 {
  69   path=$1
  70
  71   grub_warn "convert_system_path_to_grub_path() is deprecated.  Use prepare_grub_to_access_device() instead."
  72
  73   # abort if GRUB can't access the path
  74   if is_path_readable_by_grub ${path} ; then : ; else
  75     return 1
  76   fi
  77
  78   if drive=`${grub_probe} -t drive $path` ; then : ; else
  79     return 1
  80   fi
  81
  82   if relative_path=`make_system_path_relative_to_its_root $path` ; then : ; else
  83     return 1
  84   fi
  85
  86   echo ${drive}${relative_path}
  87 }
  88
  89 save_default_entry ()
  90 {
  91   if [ "x${GRUB_SAVEDEFAULT}" = "xtrue" ] ; then
  92     cat << EOF
  93 savedefault
  94 EOF
  95   fi
  96 }
  97
  98 prepare_grub_to_access_device ()
  99 {
 100   device=$1
 101
 102   # Abstraction modules aren't auto-loaded.
 103   abstraction="`${grub_probe} --device ${device} --target=abstraction`"
 104   for module in ${abstraction} ; do
 105     echo "insmod ${module}"
 106   done
 107
 108   partmap="`${grub_probe} --device ${device} --target=partmap`"
 109   for module in ${partmap} ; do
 110     echo "insmod part_${module}"
 111   done
 112
 113   fs="`${grub_probe} --device ${device} --target=fs`"
 114   for module in ${fs} ; do
 115     echo "insmod ${module}"
 116   done
 117
 118   # If there's a filesystem UUID that GRUB is capable of identifying, use it;
 119   # otherwise set root as per value in device.map.
 120   echo "set root='`${grub_probe} --device ${device} --target=drive`'"
 121   if fs_uuid="`${grub_probe} --device ${device} --target=fs_uuid 2> /dev/null`" ; then
 122     echo "search --no-floppy --fs-uuid --set=root ${fs_uuid}"
 123   fi
 124 }
 125
 126 grub_file_is_not_garbage ()
 127 {
 128   if test -f "$1" ; then
 129     case "$1" in
 130       *.dpkg-*) return 1 ;; # debian dpkg
 131       README*)  return 1 ;; # documentation
 132     esac
 133   else
 134     return 1
 135   fi
 136   return 0
 137 }
 138
 139 version_test_numeric ()
 140 {
 141   local a=$1
 142   local cmp=$2
 143   local b=$3
 144   if [ "$a" = "$b" ] ; then
 145     case $cmp in
 146       ge|eq|le) return 0 ;;
 147       gt|lt) return 1 ;;
 148     esac
 149   fi
 150   if [ "$cmp" = "lt" ] ; then
 151     c=$a
 152     a=$b
 153     b=$c
 154   fi
 155   if (echo $a ; echo $b) | sort -n | head -n 1 | grep -qx $b ; then
 156     return 0
 157   else
 158     return 1
 159   fi
 160 }
 161
 162 version_test_gt ()
 163 {
 164   local a=`echo $1 | sed -e "s/[^-]*-//"`
 165   local b=`echo $2 | sed -e "s/[^-]*-//"`
 166   local cmp=gt
 167   if [ "x$b" = "x" ] ; then
 168     return 0
 169   fi
 170   case $a:$b in
 171     *.old:*.old) ;;
 172     *.old:*) a=`echo -n $a | sed -e s/\.old$//` ; cmp=gt ;;
 173     *:*.old) b=`echo -n $b | sed -e s/\.old$//` ; cmp=ge ;;
 174   esac
 175   version_test_numeric $a $cmp $b
 176   return $?
 177 }
 178
 179 version_find_latest ()
 180 {
 181   local a=""
 182   for i in $@ ; do
 183     if version_test_gt "$i" "$a" ; then
 184       a="$i"
 185     fi
 186   done
 187   echo "$a"
 188 }
 189
 190 # One layer of quotation is eaten by "", the second by sed, and the third by
 191 # printf; so this turns ' into \'.  Note that you must use the output of
 192 # this function in a printf format string.
 193 gettext_quoted () {
 194   $gettext "$@" | sed "s/'/'\\\\\\\\''/g"
 195 }
 196
 197 # Run the first argument through gettext_quoted, and then pass that and all
 198 # remaining arguments to printf.  This is a useful abbreviation and tends to
 199 # be easier to type.
 200 gettext_printf () {
 201   local format="$1"
 202   shift
 203   printf "$(gettext_quoted "$format")" "$@"
 204 }
 205
 206 uses_abstraction () {
 207   device=$1
 208
 209   abstraction="`${grub_probe} --device ${device} --target=abstraction`"
 210   for module in ${abstraction}; do
 211     if test "x${module}" = "x$2"; then
 212       return 0
 213     fi
 214   done
 215   return 1
 216 }