debian/postinst.in

   1 #!/bin/bash
   2 set -e
   3
   4 merge_debconf_into_conf()
   5 {
   6   local tmpfile; tmpfile="$1"
   7   local setting; setting="$2"
   8   local template; template="$3"
   9
  10   db_get "$template"
  11   local value; value="$(echo "$RET" | sed -e 's,[$`"\],\\&,g')"
  12   if grep -q "^${setting}=" "$tmpfile"; then
  13     value="$(echo "$value" | sed -e 's,[\@],\\&,g')"
  14     sed -i -re "s@^(${setting}=).*@\1\"${value}\"@" "$tmpfile"
  15   else
  16     echo >> "$tmpfile"
  17     echo "${setting}=\"${value}\"" >> "$tmpfile"
  18   fi
  19 }
  20
  21 get_wubi_device()
  22 {
  23   if [ ! -x /usr/share/lupin-support/grub-mkimage ] || \
  24      ! /usr/share/lupin-support/grub-mkimage --test; then
  25     return 1
  26   fi
  27
  28   local bootdev="$(grub-probe --target=device /boot)" || true
  29   local loop_file=
  30   case $bootdev in
  31     /dev/loop/*|/dev/loop[0-9])
  32       loop_file="$(losetup "$bootdev" | sed -e "s/^[^(]*(\([^)]\+\)).*/\1/")"
  33       # If it's loop-mounted from another device, it isn't Wubi.
  34       case $loop_file in
  35         /dev/*) return 1 ;;
  36       esac
  37     ;;
  38     *) return 1 ;;
  39   esac
  40
  41   echo "$bootdev"
  42 }
  43
  44 # This only works on a Linux system with udev running.  This is probably the
  45 # vast majority of systems where we need any of this, though, and we fall
  46 # back reasonably gracefully if we don't have it.
  47 cached_available_ids=
  48 available_ids()
  49 {
  50   local id path
  51
  52   if [ "$cached_available_ids" ]; then
  53     echo "$cached_available_ids"
  54     return
  55   fi
  56
  57   [ -d /dev/disk/by-id ] || return
  58   cached_available_ids="$(
  59     for path in /dev/disk/by-id/*; do
  60       [ -e "$path" ] || continue
  61       printf '%s %s\n' "$path" "$(readlink -f "$path")"
  62     done | sort -k2 -s -u | cut -d' ' -f1
  63   )"
  64   echo "$cached_available_ids"
  65 }
  66
  67 # Returns non-zero and no output if no mapping can be found.
  68 device_to_id()
  69 {
  70   local id
  71   for id in $(available_ids); do
  72     if [ "$(readlink -f "$id")" = "$(readlink -f "$1")" ]; then
  73       echo "$id"
  74       return 0
  75     fi
  76   done
  77   # Fall back to the plain device name if there's no by-id link for it.
  78   if [ -e "$1" ]; then
  79     echo "$1"
  80     return 0
  81   fi
  82   return 1
  83 }
  84
  85 devices_to_ids()
  86 {
  87   local device id ids
  88   ids=
  89   for device; do
  90     id="$(device_to_id "$device" || true)"
  91     if [ "$id" ]; then
  92       ids="${ids:+$ids, }$id"
  93     fi
  94   done
  95   echo "$ids"
  96 }
  97
  98 all_disks()
  99 {
 100   local id
 101   for id in $(available_ids); do
 102     case $id in
 103       *-part*) ;;
 104       *) echo "$id" ;;
 105     esac
 106   done
 107 }
 108
 109 all_partitions()
 110 {
 111   local id ids
 112   ids=
 113   for id in $(available_ids); do
 114     if [ "$id" != "$1" ] && [ "${id%-part*}" = "$1" ]; then
 115       ids="${ids:+$ids }$id"
 116     fi
 117   done
 118   echo "$ids"
 119 }
 120
 121 # In order to determine whether we accidentally ran grub-install without
 122 # upgrade-from-grub-legacy on versions older than 1.98+20100617-1, we need
 123 # to be able to scan a disk to determine whether GRUB 2 was installed in its
 124 # boot sector.  This is specific to i386-pc (but that's the only platform
 125 # where we need it).
 126 scan_grub2()
 127 {
 128   if ! dd if="$1" bs=512 count=1 2>/dev/null | grep -aq GRUB; then
 129     # No version of GRUB is installed.
 130     return 1
 131   fi
 132
 133   # The GRUB boot sector always starts with a JMP instruction.
 134   initial_jmp="$(dd if="$1" bs=2 count=1 2>/dev/null | od -Ax -tx1 | \
 135                  head -n1 | cut -d' ' -f2,3)"
 136   [ "$initial_jmp" ] || return 1
 137   initial_jmp_opcode="${initial_jmp%% *}"
 138   [ "$initial_jmp_opcode" = eb ] || return 1
 139   initial_jmp_operand="${initial_jmp#* }"
 140   case $initial_jmp_operand in
 141     47|4b|4c|63)
 142       # I believe this covers all versions of GRUB 2 up to the package
 143       # version where we gained a more explicit mechanism.  GRUB Legacy
 144       # always had 48 here.
 145       return 0
 146     ;;
 147   esac
 148
 149   return 1
 150 }
 151
 152 # for Linux
 153 sysfs_size()
 154 {
 155   local num_sectors sector_size size
 156   # Try to find out the size without relying on a partitioning tool being
 157   # installed. This isn't too hard on Linux 2.6 with sysfs, but we have to
 158   # try a couple of variants on detection of the sector size.
 159   if [ -e "$1/size" ]; then
 160     num_sectors="$(cat "$1/size")"
 161     sector_size=512
 162     if [ -e "$1/queue/logical_block_size" ]; then
 163       sector_size="$(cat "$1/queue/logical_block_size")"
 164     elif [ -e "$1/queue/hw_sector_size" ]; then
 165       sector_size="$(cat "$1/queue/hw_sector_size")"
 166     fi
 167     size="$(expr "$num_sectors" \* "$sector_size" / 1000 / 1000)"
 168   fi
 169   [ "$size" ] || size='???'
 170   echo "$size"
 171 }
 172
 173 # for kFreeBSD
 174 camcontrol_size()
 175 {
 176   local num_sectors sector_size size=
 177
 178   if num_sectors="$(camcontrol readcap "$1" -q -s -N)"; then
 179     sector_size="$(camcontrol readcap "$1" -q -b)"
 180     size="$(expr "$num_sectors" \* "$sector_size" / 1000 / 1000)"
 181   fi
 182
 183   [ "$size" ] || size='???'
 184   echo "$size"
 185 }
 186
 187 # Returns value in $RET, like a debconf command.
 188 describe_disk()
 189 {
 190   local disk id base size
 191   disk="$1"
 192   id="$2"
 193
 194   model=
 195   case $(uname -s) in
 196     Linux)
 197       if which udevadm >/dev/null 2>&1; then
 198         size="$(sysfs_size "/sys$(udevadm info -n "$disk" -q path)")"
 199       else
 200         base="${disk#/dev/}"
 201         base="$(printf %s "$base" | sed 's,/,!,g')"
 202         size="$(sysfs_size "/sys/block/$base")"
 203       fi
 204
 205       if which udevadm >/dev/null 2>&1; then
 206         model="$(udevadm info -n "$disk" -q property | sed -n 's/^ID_MODEL=//p')"
 207         if [ -z "$model" ]; then
 208           model="$(udevadm info -n "$disk" -q property | sed -n 's/^DM_NAME=//p')"
 209           if [ -z "$model" ]; then
 210             model="$(udevadm info -n "$disk" -q property | sed -n 's/^MD_NAME=//p')"
 211             if [ -z "$model" ] && which dmsetup >/dev/null 2>&1; then
 212               model="$(dmsetup info -c --noheadings -o name "$disk" 2>/dev/null || true)"
 213             fi
 214           fi
 215         fi
 216       fi
 217     ;;
 218     GNU/kFreeBSD)
 219       disk_basename=$(basename "$disk")
 220       size="$(camcontrol_size "$disk_basename")"
 221       model="$(camcontrol inquiry "$disk_basename" | sed -ne "s/^pass0: <\([^>]*\)>.*/\1/p")"
 222     ;;
 223   esac
 224
 225   [ "$model" ] || model='???'
 226
 227   db_subst grub-pc/disk_description DEVICE "$disk"
 228   db_subst grub-pc/disk_description SIZE "$size"
 229   db_subst grub-pc/disk_description MODEL "$model"
 230   db_metaget grub-pc/disk_description description
 231 }
 232
 233 # Returns value in $RET, like a debconf command.
 234 describe_partition()
 235 {
 236   local disk part id path diskbase partbase size
 237   disk="$1"
 238   part="$2"
 239   id="$3"
 240   path="$4"
 241
 242   if which udevadm >/dev/null 2>&1; then
 243     size="$(sysfs_size "/sys$(udevadm info -n "$part" -q path)")"
 244   else
 245     diskbase="${disk#/dev/}"
 246     diskbase="$(printf %s "$diskbase" | sed 's,/,!,g')"
 247     partbase="${part#/dev/}"
 248     partbase="$(printf %s "$partbase" | sed 's,/,!,g')"
 249     size="$(sysfs_size "/sys/block/$diskbase/$partbase")"
 250   fi
 251
 252   db_subst grub-pc/partition_description DEVICE "$part"
 253   db_subst grub-pc/partition_description SIZE "$size"
 254   db_subst grub-pc/partition_description PATH "$path"
 255   db_metaget grub-pc/partition_description description
 256 }
 257
 258 usable_partitions()
 259 {
 260   local last_partition path partition partition_id
 261
 262   last_partition=
 263   for path in / /boot /boot/grub; do
 264     partition="$(grub-probe -t device "$path" || true)"
 265     if [ -z "$partition" ] || [ "$partition" = "$last_partition" ]; then
 266       continue
 267     fi
 268     partition_id="$(device_to_id "$partition" || true)"
 269     echo "$path:$partition_id"
 270     last_partition="$partition"
 271   done | sort -t: -k2
 272 }
 273
 274 get_mountpoint()
 275 {
 276   local relpath boot_mountpoint
 277
 278   relpath="$(grub-mkrelpath "$1")"
 279   boot_mountpoint="${1#$relpath}"
 280   echo "${boot_mountpoint:-/}"
 281 }
 282
 283 config_item()
 284 {
 285   for x in /etc/default/grub /etc/default/grub.d/*.cfg; do
 286     if [ -e "$x" ]; then
 287       . "$x"
 288     fi
 289   done
 290   if [ "$(eval echo "\${$1+set}")" = set ]; then
 291     eval echo "\$$1"
 292   else
 293     return
 294   fi
 295 }
 296
 297 running_in_container()
 298 {
 299   type running-in-container >/dev/null 2>&1 && running-in-container >/dev/null
 300 }
 301
 302 case "$1" in
 303   configure)
 304     . /usr/share/debconf/confmodule
 305
 306     if dpkg --compare-versions "$2" lt-nl 1.99-1; then
 307       # Force dpkg to replace this directory with a symlink.
 308       if [ ! -L /usr/share/doc/@PACKAGE@ ] && [ -d /usr/share/doc/@PACKAGE@ ]; then
 309         if rmdir /usr/share/doc/@PACKAGE@ 2>/dev/null; then
 310           ln -sf grub-common /usr/share/doc/@PACKAGE@
 311         fi
 312       fi
 313     fi
 314
 315     devicemap_regenerated=
 316
 317     if egrep -q '^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub' /etc/kernel-img.conf 2>/dev/null; then
 318       echo 'Removing update-grub hooks from /etc/kernel-img.conf in favour of' >&2
 319       echo '/etc/kernel/ hooks.' >&2
 320       sed -ri /etc/kernel-img.conf -e '\%^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub%d'
 321     fi
 322
 323     case @PACKAGE@ in
 324       grub-pc)
 325         mkdir -p /boot/grub
 326
 327         if test -e /boot/grub/device.map && ! test -e /boot/grub/core.img && \
 328            ! test -e /boot/grub/@FIRST_CPU_PLATFORM@/core.img; then
 329           # Looks like your device.map was generated by GRUB Legacy, which
 330           # used to generate broken device.map (see #422851).  Avoid the risk
 331           # by regenerating it.
 332           grub-mkdevicemap --no-floppy
 333           devicemap_regenerated=1
 334         fi
 335       ;;
 336     esac
 337
 338     if test -z "$devicemap_regenerated" && test -s /boot/grub/device.map && \
 339        dpkg --compare-versions "$2" lt-nl 1.98+20100702-1 && \
 340        test "$(uname -s)" = Linux; then
 341       # Earlier versions of GRUB used unstable device names in device.map,
 342       # which caused a variety of problems.  There is some risk associated with
 343       # regenerating it (so we prompt the user if it's non-trivial), but on the
 344       # whole it's less risky to move to /dev/disk/by-id/.
 345       devicemap_lines="$(egrep -v '^[[:space:]]+#' /boot/grub/device.map | wc -l)"
 346       grub-mkdevicemap --no-floppy
 347       devicemap_regenerated=1
 348       if test "$devicemap_lines" != 1; then
 349         db_input critical grub2/device_map_regenerated || true
 350         db_go || true
 351       fi
 352     fi
 353
 354     if test -z "$devicemap_regenerated" && \
 355        dpkg --compare-versions "$2" lt-nl 1.99~20101210-2 && \
 356        grep -qs /md-uuid- /boot/grub/device.map; then
 357       echo "Removing MD devices from device.map, since the BIOS cannot read from these." >&2
 358       sed -i '/\/md-uuid-/d' /boot/grub/device.map
 359     fi
 360
 361     tmp_default_grub="$(mktemp -t grub.XXXXXXXXXX)"
 362     trap "rm -f ${tmp_default_grub}" EXIT
 363     cp -p /usr/share/grub/default/grub ${tmp_default_grub}
 364
 365     merge_debconf_into_conf "$tmp_default_grub" GRUB_CMDLINE_LINUX grub2/linux_cmdline
 366     merge_debconf_into_conf "$tmp_default_grub" GRUB_CMDLINE_LINUX_DEFAULT grub2/linux_cmdline_default
 367
 368     case @PACKAGE@ in
 369       grub-pc)
 370         merge_debconf_into_conf "$tmp_default_grub" GRUB_TIMEOUT grub-pc/timeout
 371         sed -i -e 's/^\(GRUB_TIMEOUT=\)"\([0-9][0-9]*\)"/\1\2/' "$tmp_default_grub"
 372         db_get grub-pc/hidden_timeout
 373         if [ "$RET" = false ]; then
 374           sed -i -e 's/^GRUB_HIDDEN_TIMEOUT=/#&/' "$tmp_default_grub"
 375         fi
 376       ;;
 377     esac
 378
 379     ucf --three-way --debconf-ok --sum-file=/usr/share/grub/default/grub.md5sum ${tmp_default_grub} /etc/default/grub
 380     package="$(ucfq --with-colons /etc/default/grub | cut -d : -f 2)"
 381     if echo $package | grep -q "^grub-" ; then
 382       ucfr --force @PACKAGE@ /etc/default/grub
 383     else
 384       ucfr @PACKAGE@ /etc/default/grub
 385     fi
 386
 387     case @PACKAGE@ in
 388       grub-pc)
 389
 390         fix_mixed_system=
 391         if test -e /boot/grub/stage2 && test -e /boot/grub/menu.lst && \
 392            ! test -e /boot/grub/grub2-installed && \
 393            test -z "$UPGRADE_FROM_GRUB_LEGACY"; then
 394           # Unfortunately, it's still possible that the user upgraded fully
 395           # to GRUB 2 in some way other than running
 396           # upgrade-from-grub-legacy; perhaps they ran grub-install by hand
 397           # for some reason.  It's really quite difficult to detect this
 398           # situation, because the only difference between this and a
 399           # working chainloaded setup is that in this case grub-setup has
 400           # been run.  So, to try to tell the difference, we scan the boot
 401           # sectors of all disks for a GRUB 2 boot sector.  Hopefully this
 402           # won't cause too much to explode, since I can't think of a better
 403           # method.
 404           grub2_disks=
 405           for disk in $(all_disks); do
 406             if scan_grub2 "$disk"; then
 407               grub2_disks="${grub2_disks:+$grub2_disks }$(readlink -f "$disk")"
 408             fi
 409           done
 410           if [ "$grub2_disks" ]; then
 411             # No || true here; it's vital that the user sees this, and it's
 412             # better to throw an error than to do the wrong thing.
 413             db_subst grub-pc/mixed_legacy_and_grub2 DISKS "$grub2_disks"
 414             db_fset grub-pc/mixed_legacy_and_grub2 seen false
 415             db_input critical grub-pc/mixed_legacy_and_grub2
 416             db_go
 417             db_get grub-pc/mixed_legacy_and_grub2
 418             if [ "$RET" = true ]; then
 419               db_reset grub-pc/install_devices
 420               UPGRADE_FROM_GRUB_LEGACY=1
 421               fix_mixed_system=1
 422               # Fall through to normal installation logic.
 423             fi
 424           fi
 425         fi
 426
 427         # Make sure that Wubi users never see confusing device prompts.
 428         # Wubi is a very specialised hack that does complicated things with
 429         # grub-install diversions to create an image that's chained from the
 430         # Windows boot loader to boot an operating system from a file on a
 431         # Windows file system.  In these circumstances, prompting for where
 432         # to install GRUB is not going to help anyone.
 433         wubi_device="$(get_wubi_device)" || true
 434         if [ "$wubi_device" ]; then
 435           db_set grub-pc/install_devices "$wubi_device"
 436           db_fset grub-pc/install_devices seen true
 437         fi
 438
 439         if test -e /boot/grub/stage2 && test -e /boot/grub/menu.lst && \
 440            ! test -e /boot/grub/grub2-installed && \
 441            test -z "$UPGRADE_FROM_GRUB_LEGACY"; then
 442           db_get grub-pc/chainload_from_menu.lst
 443           if $RET ; then
 444             # Create core.img (but do not risk writing to MBR).
 445             # Using grub-probe instead of "(hd0)" avoids (UUID=) hack slowness
 446             # in case /boot/grub is not on (hd0) in device.map.
 447             echo "Generating core.img" >&2
 448             grub-install --target=i386-pc --no-floppy --grub-setup=/bin/true "$(grub-probe -t drive /boot/grub)" > /dev/null
 449
 450             # Update menu.lst to reflect that:
 451             # - core.img is present now
 452             # - core.img has to be the first option
 453             echo "Saving menu.lst backup in /boot/grub/menu.lst_backup_by_grub2_postinst" >&2
 454             cp /boot/grub/menu.lst{,_backup_by_grub2_postinst}
 455             echo "Running update-grub Legacy to hook our core.img in it" >&2
 456             LET_US_TRY_GRUB_2=true /usr/lib/grub-legacy/update-grub 2>&1 | sed -e "s/^/    /g" >&2
 457             # We just hooked GRUB 2 in menu.lst; then also generate grub.cfg.
 458             touch /boot/grub/grub.cfg
 459           fi
 460         elif running_in_container; then
 461           # Skip grub-install in containers.
 462           :
 463         elif test -z "$2" || test -e /boot/grub/core.img || \
 464              test -e /boot/grub/@FIRST_CPU_PLATFORM@/core.img || \
 465              test "$UPGRADE_FROM_GRUB_LEGACY" || test "$wubi_device"; then
 466           question=grub-pc/install_devices
 467           priority=high
 468           device_map="$(grub-mkdevicemap -m - | grep -v '^(fd[0-9]\+)' || true)"
 469           devices="$(echo "$device_map" | cut -f2)"
 470           if dpkg --compare-versions "$2" lt 1.98+20100702-1 && \
 471              test "$(uname -s)" = Linux && [ -z "$wubi_device" ]; then
 472             # Migrate to new by-id naming scheme.
 473             db_get grub-pc/install_devices
 474             old_devices="$(echo "$RET" | sed 's/, / /g')"
 475             new_devices=
 476             # Common-case optimisation: if the list of devices is
 477             # identical to the LHS of grub-mkdevicemap's output, then
 478             # there's no point asking again; just install to all disks.
 479             # (This handles e.g. "(hd0)" with one disk.)
 480             if [ "$(echo "$device_map" | cut -f1 | sort)" = \
 481                  "$(echo "$old_devices" | xargs -n1 | sort)" ]; then
 482               new_devices="$(devices_to_ids $devices)"
 483               db_set grub-pc/install_devices "$new_devices"
 484             # Alternatively, we might be installing to a single partition
 485             # on a single disk, and we can deal with that too if there's
 486             # only one available disk and it has an appropriate partition.
 487             # This doesn't necessarily work for multiple disks because now
 488             # the order matters.
 489             elif [ "$(echo "$device_map" | wc -l)" = 1 ] && \
 490                  [ "$(echo "$old_devices" | wc -w)" = 1 ] && \
 491                  echo "$old_devices" | grep -q ,; then
 492               old_device="${old_devices#(}"
 493               old_device="${old_device%)}"
 494               old_disk="${old_device%,*}"
 495               old_partition="${old_device##*,}"
 496               new_device="$(echo "$device_map" | grep "^($old_disk)" | \
 497                             cut -f2)"
 498               new_device="$(device_to_id $new_device)"
 499               if [ "$new_device" ]; then
 500                 new_device="$new_device-part$old_partition"
 501                 # Run through device_to_id again to check for existence.
 502                 new_device="$(device_to_id $new_device)"
 503               fi
 504               if [ "$new_device" ]; then
 505                 new_devices="$new_device"
 506                 db_set grub-pc/install_devices "$new_device"
 507               fi
 508             fi
 509             if [ -z "$new_devices" ]; then
 510               new_devices="$(devices_to_ids $old_devices)"
 511               db_set grub-pc/install_devices "$new_devices"
 512               # Common-case optimisation: if all devices are translatable
 513               # to by-id and the number of devices there is the same as
 514               # the number of devices GRUB can see, then there's no point
 515               # asking again.  (This handles e.g. "/dev/sda" with one
 516               # disk.)
 517               old_devices_count="$(echo "$old_devices" | wc -w)"
 518               new_devices_count="$(echo "$new_devices" | wc -w)"
 519               devices_count="$(echo "$devices" | wc -w)"
 520               if [ "$old_devices_count" != "$new_devices_count" ] || \
 521                  [ "$new_devices_count" != "$devices_count" ]; then
 522                 db_fset grub-pc/install_devices seen false
 523                 db_fset grub-pc/install_devices_empty seen false
 524               fi
 525             fi
 526           else
 527             db_get grub-pc/install_devices
 528             valid=1
 529             for device in $RET; do
 530               if [ ! -e "${device%,}" ]; then
 531                 valid=0
 532                 break
 533               fi
 534             done
 535             if [ "$valid" = 0 ]; then
 536               question=grub-pc/install_devices_disks_changed
 537               priority=critical
 538               db_set "$question" "$RET"
 539               db_fset "$question" seen false
 540               db_fset grub-pc/install_devices_empty seen false
 541             fi
 542           fi
 543
 544           while :; do
 545             ids=
 546             descriptions=
 547             partitions="$(usable_partitions)"
 548             for device in $devices; do
 549               disk_id="$(device_to_id "$device" || true)"
 550               if [ "$disk_id" ]; then
 551                 ids="${ids:+$ids, }$disk_id"
 552                 describe_disk "$(readlink -f "$device")" "$disk_id"
 553                 RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 554                 descriptions="${descriptions:+$descriptions, }$RET"
 555                 for partition_pair in $partitions; do
 556                   partition_id="${partition_pair#*:}"
 557                   if [ "${partition_id#$disk_id-part}" != "$partition_id" ]; then
 558                     ids="${ids:+$ids, }$partition_id"
 559                     describe_partition "$(readlink -f "$device")" "$(readlink -f "$partition_id")" "$partition_id" "$(get_mountpoint "${partition_pair%%:*}")"
 560                     RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 561                     descriptions="${descriptions:+$descriptions, }$RET"
 562                   fi
 563                 done
 564               fi
 565             done
 566             # Some "partitions" may in fact be at the disk level, e.g. RAID.
 567             # List these as well if they haven't already been listed.
 568             for partition_pair in $partitions; do
 569               partition_id="${partition_pair#*:}"
 570               if [ "${partition_id#*-part}" = "$partition_id" ]; then
 571                 case ", $ids, " in
 572                   ", $partition_id, ") ;;
 573                   *)
 574                     ids="${ids:+$ids, }$partition_id"
 575                     describe_disk "$(readlink -f "$partition_id")" "$partition_id"
 576                     RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 577                     descriptions="${descriptions:+$descriptions, }$RET"
 578                     ;;
 579                 esac
 580               fi
 581             done
 582             db_subst "$question" RAW_CHOICES "$ids"
 583             db_subst "$question" CHOICES "$descriptions"
 584             db_input "$priority" "$question" || true
 585             db_go
 586             db_get "$question"
 587             failed_devices=
 588             for i in `echo $RET | sed -e 's/, / /g'` ; do
 589               real_device="$(readlink -f "$i")"
 590               if grub-install --target=i386-pc --force --no-floppy $real_device ; then
 591                 # We just installed GRUB 2; then also generate grub.cfg.
 592                 touch /boot/grub/grub.cfg
 593               else
 594                 failed_devices="$failed_devices $real_device"
 595               fi
 596             done
 597
 598             if [ "$question" != grub-pc/install_devices ]; then
 599               db_set grub-pc/install_devices "$RET"
 600               db_fset grub-pc/install_devices seen true
 601             fi
 602
 603             if [ "$failed_devices" ]; then
 604               if [ "$UPGRADE_FROM_GRUB_LEGACY" ]; then
 605                 db_subst grub-pc/install_devices_failed_upgrade FAILED_DEVICES "$failed_devices"
 606                 db_fset grub-pc/install_devices_failed_upgrade seen false
 607                 if db_input critical grub-pc/install_devices_failed_upgrade; then
 608                   db_go
 609                   db_get grub-pc/install_devices_failed_upgrade
 610                   if [ "$RET" = true ]; then
 611                     db_fset "$question" seen false
 612                     db_fset grub-pc/install_devices_failed_upgrade seen false
 613                     continue
 614                   else
 615                     exit 1
 616                   fi
 617                 else
 618                   exit 1 # noninteractive
 619                 fi
 620               else
 621                 db_subst grub-pc/install_devices_failed FAILED_DEVICES "$failed_devices"
 622                 db_fset grub-pc/install_devices_failed seen false
 623                 if db_input critical grub-pc/install_devices_failed; then
 624                   db_go
 625                   db_get grub-pc/install_devices_failed
 626                   if [ "$RET" = true ]; then
 627                     break
 628                   else
 629                     db_fset "$question" seen false
 630                     db_fset grub-pc/install_devices_failed seen false
 631                     continue
 632                   fi
 633                 else
 634                   break # noninteractive
 635                 fi
 636               fi
 637             fi
 638
 639             db_get grub-pc/install_devices
 640             if [ -z "$RET" ]; then
 641               # Reset the seen flag if the current answer is false, since
 642               # otherwise we'll loop with no indication of why.
 643               db_get grub-pc/install_devices_empty
 644               if [ "$RET" = false ]; then
 645                 db_fset grub-pc/install_devices_empty seen false
 646               fi
 647               if db_input critical grub-pc/install_devices_empty; then
 648                 db_go
 649                 db_get grub-pc/install_devices_empty
 650                 if [ "$RET" = true ]; then
 651                   break
 652                 else
 653                   db_fset "$question" seen false
 654                   db_fset grub-pc/install_devices_empty seen false
 655                 fi
 656               else
 657                 break # noninteractive
 658               fi
 659             else
 660               break
 661             fi
 662           done
 663         fi
 664
 665         # /boot/grub/ has more chances of being accessible by GRUB
 666         if test -e /boot/grub/grub.cfg ; then
 667           for i in /usr/share/grub/unicode.pf2 ; do
 668             if test -e $i ; then
 669               cp $i /boot/grub/
 670             fi
 671           done
 672         fi
 673
 674         if [ "$fix_mixed_system" ]; then
 675           # These never contain any valuable information, and they aren't
 676           # useful for boot any more, since we just overwrote MBR/PBR.
 677           rm -f /boot/grub/{{xfs,reiserfs,e2fs,fat,jfs,minix}_stage1_5,stage{1,2}}
 678           # Remove marker file used to indicate that grub-install was run
 679           # rather than upgrade-from-grub-legacy.  Since stage2 has been
 680           # removed, we don't need this any more.
 681           rm -f /boot/grub/grub2-installed
 682         fi
 683       ;;
 684
 685       grub-efi-ia32|grub-efi-amd64|grub-efi-ia64|grub-efi-arm|grub-efi-arm64)
 686         bootloader_id="$(config_item GRUB_DISTRIBUTOR | tr A-Z a-z | \
 687                          cut -d' ' -f1)"
 688         case $bootloader_id in
 689           kubuntu) bootloader_id=ubuntu ;;
 690         esac
 691         if [ "$bootloader_id" ] && [ -d "/boot/efi/EFI/$bootloader_id" ]; then
 692           case @PACKAGE@ in
 693             grub-efi-ia32)  target=i386-efi ;;
 694             grub-efi-amd64) target=x86_64-efi ;;
 695             grub-efi-ia64)  target=ia64-efi ;;
 696             grub-efi-arm)   target=arm-efi ;;
 697             grub-efi-arm64) target=arm64-efi ;;
 698           esac
 699           grub-install --target="$target"
 700         fi
 701
 702         # /boot/grub/ has more chances of being accessible by GRUB
 703         for i in /usr/share/grub/unicode.pf2 ; do
 704           if test -e $i ; then
 705             mkdir -p /boot/grub
 706             cp $i /boot/grub/
 707           fi
 708         done
 709       ;;
 710
 711       grub-ieee1275)
 712         case $(dpkg --print-architecture) in
 713           ppc64el)
 714             # Output may be empty; if so, just update the core image but
 715             # don't install it to any PReP partition.
 716             prep_bootdev="$(/usr/lib/grub/powerpc-ieee1275/prep-bootdev)"
 717             grub-install --target=powerpc-ieee1275 $prep_bootdev
 718           ;;
 719         esac
 720       ;;
 721
 722       grub-yeeloong)
 723         grub-install --target=mipsel-loongson
 724       ;;
 725
 726       grub-xen)
 727         # Install for x86_64 regardless of arch, since a 32-bit userspace can still boot with a 64-bit kernel.
 728         mkdir -p /boot/xen
 729         grub-install --target=x86_64-xen
 730         case $(dpkg --print-architecture) in
 731           i386)
 732             grub-install --target=i386-xen
 733           ;;
 734         esac
 735       ;;
 736     esac
 737
 738     # If grub.cfg has been generated, update it.
 739     if test -e /boot/grub/grub.cfg && ! running_in_container; then
 740       update-grub 3>&-
 741     fi
 742   ;;
 743   abort-upgrade|abort-remove|abort-deconfigure)
 744   ;;
 745   *)
 746     echo "postinst called with unknown argument \`$1'" >&2
 747     exit 1
 748   ;;
 749 esac
 750
 751 # dh_installdeb will replace this with shell code automatically
 752 # generated by other debhelper scripts.
 753
 754 #DEBHELPER#
 755
 756 exit 0