util/grub-mkconfig.in

   1 #! /bin/sh -e
   2
   3 # Generate grub.cfg by inspecting /boot contents.
   4 # Copyright (C) 2006,2007,2008,2009 Free Software Foundation, Inc.
   5 #
   6 # GRUB is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # GRUB is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 # GNU General Public License for more details.
  15 #
  16 # You should have received a copy of the GNU General Public License
  17 # along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 transform="@program_transform_name@"
  20
  21 prefix=@prefix@
  22 exec_prefix=@exec_prefix@
  23 sbindir=@sbindir@
  24 libdir=@libdir@
  25 sysconfdir=@sysconfdir@
  26 package_version=@PACKAGE_VERSION@
  27 datarootdir=@datarootdir@
  28 datadir=@datadir@
  29 pkgdatadir=${datadir}/`echo @PACKAGE_TARNAME@ | sed "${transform}"`
  30 grub_prefix=`echo /boot/grub | sed ${transform}`
  31 grub_cfg=""
  32 grub_mkconfig_dir=${sysconfdir}/grub.d
  33
  34 grub_mkdevicemap=${sbindir}/`echo grub-mkdevicemap | sed ${transform}`
  35 grub_probe=${sbindir}/`echo grub-probe | sed ${transform}`
  36
  37 # Usage: usage
  38 # Print the usage.
  39 usage () {
  40     cat <<EOF
  41 Usage: $0 [OPTION]
  42 Generate a grub config file
  43
  44   -o, --output=FILE       output generated config to FILE [default=stdout]
  45   -h, --help              print this message and exit
  46   -v, --version           print the version information and exit
  47
  48 Report bugs to <bug-grub@gnu.org>.
  49 EOF
  50 }
  51
  52 # Check the arguments.
  53 for option in "$@"; do
  54     case "$option" in
  55     -h | --help)
  56         usage
  57         exit 0 ;;
  58     -v | --version)
  59         echo "$0 (GNU GRUB ${package_version})"
  60         exit 0 ;;
  61     -o)
  62         shift
  63         grub_cfg=$1
  64         ;;
  65     --output=*)
  66         grub_cfg=`echo "$option" | sed 's/--output=//'`
  67         ;;
  68     -*)
  69         echo "Unrecognized option \`$option'" 1>&2
  70         usage
  71         exit 1
  72         ;;
  73     esac
  74 done
  75
  76 . ${libdir}/grub/grub-mkconfig_lib
  77
  78 if [ "x$EUID" = "x" ] ; then
  79   EUID=`id -u`
  80 fi
  81
  82 if [ "$EUID" != 0 ] ; then
  83   root=f
  84   case "`uname 2>/dev/null`" in
  85     CYGWIN*)
  86       # Cygwin: Assume root if member of admin group
  87       for g in `id -G 2>/dev/null` ; do
  88         case $g in
  89           0|544) root=t ;;
  90         esac
  91       done ;;
  92   esac
  93   if [ $root != t ] ; then
  94     echo "$0: You must run this as root" >&2
  95     exit 1
  96   fi
  97 fi
  98
  99 set $grub_mkdevicemap dummy
 100 if test -f "$1"; then
 101     :
 102 else
 103     echo "$1: Not found." 1>&2
 104     exit 1
 105 fi
 106
 107 set $grub_probe dummy
 108 if test -f "$1"; then
 109     :
 110 else
 111     echo "$1: Not found." 1>&2
 112     exit 1
 113 fi
 114
 115 mkdir -p ${grub_prefix}
 116
 117 if test -e ${grub_prefix}/device.map ; then : ; else
 118   ${grub_mkdevicemap}
 119 fi
 120
 121 # Device containing our userland.  Typically used for root= parameter.
 122 GRUB_DEVICE="`${grub_probe} --target=device /`"
 123 GRUB_DEVICE_UUID="`${grub_probe} --device ${GRUB_DEVICE} --target=fs_uuid 2> /dev/null`" || true
 124
 125 # Device containing our /boot partition.  Usually the same as GRUB_DEVICE.
 126 GRUB_DEVICE_BOOT="`${grub_probe} --target=device /boot`"
 127 GRUB_DEVICE_BOOT_UUID="`${grub_probe} --device ${GRUB_DEVICE_BOOT} --target=fs_uuid 2> /dev/null`" || true
 128
 129 # Filesystem for the device containing our userland.  Used for stuff like
 130 # choosing Hurd filesystem module.
 131 GRUB_FS="`${grub_probe} --target=fs / 2> /dev/null || echo unknown`"
 132
 133 if test -f ${sysconfdir}/default/grub ; then
 134   . ${sysconfdir}/default/grub
 135 fi
 136
 137 # XXX: should this be deprecated at some point?
 138 if [ "x${GRUB_TERMINAL}" != "x" ] ; then
 139   GRUB_TERMINAL_INPUT="${GRUB_TERMINAL}"
 140   GRUB_TERMINAL_OUTPUT="${GRUB_TERMINAL}"
 141 fi
 142
 143 case x${GRUB_TERMINAL_OUTPUT} in
 144   x | xgfxterm)
 145     # If this platform supports gfxterm, try to use it.
 146     if test -e ${grub_prefix}/gfxterm.mod ; then
 147       GRUB_VIDEO_BACKEND=
 148       for i in vbe ; do
 149         if test -e ${grub_prefix}/$i.mod ; then
 150           GRUB_VIDEO_BACKEND=$i
 151           break
 152         fi
 153       done
 154       if [ -n "${GRUB_VIDEO_BACKEND}" ] ; then
 155         GRUB_TERMINAL_OUTPUT=gfxterm
 156       elif [ "${GRUB_TERMINAL_OUTPUT}" = "gfxterm" ] ; then
 157         echo "No suitable backend could be found for gfxterm." >&2 ; exit 1
 158       fi
 159     fi
 160   ;;
 161   xconsole | xserial | xofconsole) ;;
 162   *) echo "Invalid output terminal \"${GRUB_TERMINAL_OUTPUT}\"" >&2 ; exit 1 ;;
 163 esac
 164
 165 # check for terminals that require fonts
 166 case ${GRUB_TERMINAL_OUTPUT} in
 167   gfxterm)
 168     if [ -n "$GRUB_FONT" ] ; then
 169       if is_path_readable_by_grub ${GRUB_FONT} > /dev/null ; then
 170         GRUB_FONT_PATH=${GRUB_FONT}
 171         else
 172           echo "No such font or not readable by grub: ${GRUB_FONT}" >&2
 173           exit 1
 174         fi
 175     else
 176       for dir in ${pkgdatadir} /boot/grub /usr/share/grub ; do
 177         for basename in unicode unifont ascii; do
 178           path="${dir}/${basename}.pf2"
 179           if is_path_readable_by_grub ${path} > /dev/null ; then
 180             GRUB_FONT_PATH=${path}
 181           else
 182             continue
 183           fi
 184           if [ "${basename}" = "ascii" ] ; then
 185             # make sure all our children behave in conformance with ascii..
 186             export LANG=C
 187           fi
 188           break 2
 189         done
 190       done
 191     fi
 192     if [ -z "${GRUB_FONT_PATH}" ] ; then
 193       # fallback to the native terminal for this platform
 194       unset GRUB_TERMINAL_OUTPUT
 195     fi
 196   ;;
 197   *)
 198     # make sure all our children behave in conformance with ascii..
 199     export LANG=C
 200 esac
 201
 202 # These are defined in this script, export them here so that user can
 203 # override them.
 204 export GRUB_DEVICE \
 205   GRUB_DEVICE_UUID \
 206   GRUB_DEVICE_BOOT \
 207   GRUB_DEVICE_BOOT_UUID \
 208   GRUB_FS \
 209   GRUB_FONT_PATH \
 210   GRUB_PRELOAD_MODULES \
 211   GRUB_VIDEO_BACKEND
 212
 213 # These are optional, user-defined variables.
 214 export GRUB_DEFAULT \
 215   GRUB_HIDDEN_TIMEOUT \
 216   GRUB_HIDDEN_TIMEOUT_QUIET \
 217   GRUB_TIMEOUT \
 218   GRUB_DISTRIBUTOR \
 219   GRUB_CMDLINE_LINUX \
 220   GRUB_CMDLINE_LINUX_DEFAULT \
 221   GRUB_TERMINAL_INPUT \
 222   GRUB_TERMINAL_OUTPUT \
 223   GRUB_SERIAL_COMMAND \
 224   GRUB_DISABLE_LINUX_UUID \
 225   GRUB_DISABLE_LINUX_RECOVERY \
 226   GRUB_GFXMODE \
 227   GRUB_DISABLE_OS_PROBER
 228
 229 if test "x${grub_cfg}" != "x"; then
 230   rm -f ${grub_cfg}.new
 231   exec > ${grub_cfg}.new
 232
 233   # Allow this to fail, since /boot/grub/ might need to be fatfs to support some
 234   # firmware implementations (e.g. OFW or EFI).
 235   chmod 400 ${grub_cfg}.new || grub_warn "Could not make ${grub_cfg}.new readable by only root.\
 236   This means that if the generated config contains a password it is readable by everyone"
 237 fi
 238 echo "Generating grub.cfg ..." >&2
 239
 240 cat << EOF
 241 #
 242 # DO NOT EDIT THIS FILE
 243 #
 244 # It is automatically generated by $0 using templates
 245 # from ${grub_mkconfig_dir} and settings from ${sysconfdir}/default/grub
 246 #
 247 EOF
 248
 249 for i in ${grub_mkconfig_dir}/* ; do
 250   case "$i" in
 251     # emacsen backup files. FIXME: support other editors
 252     *~) ;;
 253     *)
 254       if grub_file_is_not_garbage "$i" && test -x "$i" ; then
 255         echo
 256         echo "### BEGIN $i ###"
 257         "$i"
 258         echo "### END $i ###"
 259       fi
 260     ;;
 261   esac
 262 done
 263
 264 if test "x${grub_cfg}" != "x" ; then
 265   # none of the children aborted with error, install the new grub.cfg
 266   mv -f ${grub_cfg}.new ${grub_cfg}
 267 fi
 268
 269 echo "done" >&2