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 systemd-detect-virt >/dev/null 2>&1 && systemd-detect-virt --quiet --container
 300 }
 301
 302 no_nvram_arg() {
 303     db_get grub2/update_nvram
 304     if [ "$RET" = false ]; then
 305         echo "--no-nvram"
 306     fi
 307 }
 308
 309 run_grub_install()
 310 {
 311     if ! grub-install $@ ; then
 312         echo "Failed: grub-install $@" >&2
 313         echo "WARNING: Bootloader is not properly installed, system may not be bootable" >&2
 314     fi
 315 }
 316
 317 case "$1" in
 318   configure)
 319     . /usr/share/debconf/confmodule
 320
 321     devicemap_regenerated=
 322
 323     if egrep -q '^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub' /etc/kernel-img.conf 2>/dev/null; then
 324       echo 'Removing update-grub hooks from /etc/kernel-img.conf in favour of' >&2
 325       echo '/etc/kernel/ hooks.' >&2
 326       sed -ri /etc/kernel-img.conf -e '\%^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub%d'
 327     fi
 328
 329     mkdir -p /boot/grub
 330
 331     case @PACKAGE@ in
 332       grub-pc)
 333         if test -e /boot/grub/device.map && ! test -e /boot/grub/core.img && \
 334            ! test -e /boot/grub/@FIRST_CPU_PLATFORM@/core.img; then
 335           # Looks like your device.map was generated by GRUB Legacy, which
 336           # used to generate broken device.map (see #422851).  Avoid the risk
 337           # by regenerating it.
 338           grub-mkdevicemap --no-floppy
 339           devicemap_regenerated=1
 340         fi
 341       ;;
 342     esac
 343
 344     if test -z "$devicemap_regenerated" && test -s /boot/grub/device.map && \
 345        dpkg --compare-versions "$2" lt-nl 1.98+20100702-1 && \
 346        test "$(uname -s)" = Linux; then
 347       # Earlier versions of GRUB used unstable device names in device.map,
 348       # which caused a variety of problems.  There is some risk associated with
 349       # regenerating it (so we prompt the user if it's non-trivial), but on the
 350       # whole it's less risky to move to /dev/disk/by-id/.
 351       devicemap_lines="$(egrep -v '^[[:space:]]+#' /boot/grub/device.map | wc -l)"
 352       grub-mkdevicemap --no-floppy
 353       devicemap_regenerated=1
 354       if test "$devicemap_lines" != 1; then
 355         db_input critical grub2/device_map_regenerated || true
 356         db_go || true
 357       fi
 358     fi
 359
 360     if test -z "$devicemap_regenerated" && \
 361        dpkg --compare-versions "$2" lt-nl 1.99~20101210-2 && \
 362        grep -qs /md-uuid- /boot/grub/device.map; then
 363       echo "Removing MD devices from device.map, since the BIOS cannot read from these." >&2
 364       sed -i '/\/md-uuid-/d' /boot/grub/device.map
 365     fi
 366
 367     tmp_default_grub="$(mktemp -t grub.XXXXXXXXXX)"
 368     trap "rm -f ${tmp_default_grub}" EXIT
 369     cp -p /usr/share/grub/default/grub ${tmp_default_grub}
 370
 371     merge_debconf_into_conf "$tmp_default_grub" GRUB_CMDLINE_LINUX grub2/linux_cmdline
 372     merge_debconf_into_conf "$tmp_default_grub" GRUB_CMDLINE_LINUX_DEFAULT grub2/linux_cmdline_default
 373
 374     case @PACKAGE@ in
 375       grub-pc)
 376         merge_debconf_into_conf "$tmp_default_grub" GRUB_TIMEOUT grub-pc/timeout
 377         sed -i -e 's/^\(GRUB_TIMEOUT=\)"\([0-9][0-9]*\)"/\1\2/' "$tmp_default_grub"
 378         db_get grub-pc/hidden_timeout
 379         if [ "$RET" = false ]; then
 380           sed -i -e 's/^GRUB_HIDDEN_TIMEOUT=/#&/' "$tmp_default_grub"
 381         fi
 382       ;;
 383     esac
 384
 385     ucf --three-way --debconf-ok --sum-file=/usr/share/grub/default/grub.md5sum ${tmp_default_grub} /etc/default/grub
 386     package="$(ucfq --with-colons /etc/default/grub | cut -d : -f 2)"
 387     if echo $package | grep -q "^grub-" ; then
 388       ucfr --force @PACKAGE@ /etc/default/grub
 389     else
 390       ucfr @PACKAGE@ /etc/default/grub
 391     fi
 392
 393     case @PACKAGE@ in
 394       grub-pc)
 395
 396         fix_mixed_system=
 397         if test -e /boot/grub/stage2 && test -e /boot/grub/menu.lst && \
 398            ! test -e /boot/grub/grub2-installed && \
 399            test -z "$UPGRADE_FROM_GRUB_LEGACY"; then
 400           # Unfortunately, it's still possible that the user upgraded fully
 401           # to GRUB 2 in some way other than running
 402           # upgrade-from-grub-legacy; perhaps they ran grub-install by hand
 403           # for some reason.  It's really quite difficult to detect this
 404           # situation, because the only difference between this and a
 405           # working chainloaded setup is that in this case grub-setup has
 406           # been run.  So, to try to tell the difference, we scan the boot
 407           # sectors of all disks for a GRUB 2 boot sector.  Hopefully this
 408           # won't cause too much to explode, since I can't think of a better
 409           # method.
 410           grub2_disks=
 411           for disk in $(all_disks); do
 412             if scan_grub2 "$disk"; then
 413               grub2_disks="${grub2_disks:+$grub2_disks }$(readlink -f "$disk")"
 414             fi
 415           done
 416           if [ "$grub2_disks" ]; then
 417             # No || true here; it's vital that the user sees this, and it's
 418             # better to throw an error than to do the wrong thing.
 419             db_subst grub-pc/mixed_legacy_and_grub2 DISKS "$grub2_disks"
 420             db_fset grub-pc/mixed_legacy_and_grub2 seen false
 421             db_input critical grub-pc/mixed_legacy_and_grub2
 422             db_go
 423             db_get grub-pc/mixed_legacy_and_grub2
 424             if [ "$RET" = true ]; then
 425               db_reset grub-pc/install_devices
 426               UPGRADE_FROM_GRUB_LEGACY=1
 427               fix_mixed_system=1
 428               # Fall through to normal installation logic.
 429             fi
 430           fi
 431         fi
 432
 433         # Make sure that Wubi users never see confusing device prompts.
 434         # Wubi is a very specialised hack that does complicated things with
 435         # grub-install diversions to create an image that's chained from the
 436         # Windows boot loader to boot an operating system from a file on a
 437         # Windows file system.  In these circumstances, prompting for where
 438         # to install GRUB is not going to help anyone.
 439         wubi_device="$(get_wubi_device)" || true
 440         if [ "$wubi_device" ]; then
 441           db_set grub-pc/install_devices "$wubi_device"
 442           db_fset grub-pc/install_devices seen true
 443         fi
 444
 445         if test -e /boot/grub/stage2 && test -e /boot/grub/menu.lst && \
 446            ! test -e /boot/grub/grub2-installed && \
 447            test -z "$UPGRADE_FROM_GRUB_LEGACY"; then
 448           db_get grub-pc/chainload_from_menu.lst
 449           if $RET ; then
 450             # Create core.img (but do not risk writing to MBR).
 451             # Using grub-probe instead of "(hd0)" avoids (UUID=) hack slowness
 452             # in case /boot/grub is not on (hd0) in device.map.
 453             echo "Generating core.img" >&2
 454             grub-install --target=i386-pc --no-floppy --grub-setup=/bin/true "$(grub-probe -t drive /boot/grub)" > /dev/null
 455
 456             # Update menu.lst to reflect that:
 457             # - core.img is present now
 458             # - core.img has to be the first option
 459             echo "Saving menu.lst backup in /boot/grub/menu.lst_backup_by_grub2_postinst" >&2
 460             cp /boot/grub/menu.lst{,_backup_by_grub2_postinst}
 461             echo "Running update-grub Legacy to hook our core.img in it" >&2
 462             LET_US_TRY_GRUB_2=true /usr/lib/grub-legacy/update-grub 2>&1 | sed -e "s/^/    /g" >&2
 463             # We just hooked GRUB 2 in menu.lst; then also generate grub.cfg.
 464             touch /boot/grub/grub.cfg
 465           fi
 466         elif running_in_container; then
 467           # Skip grub-install in containers.
 468           :
 469         elif test -z "$2" || test -e /boot/grub/core.img || \
 470              test -e /boot/grub/@FIRST_CPU_PLATFORM@/core.img || \
 471              test "$UPGRADE_FROM_GRUB_LEGACY" || test "$wubi_device"; then
 472           question=grub-pc/install_devices
 473           priority=high
 474           device_map="$(grub-mkdevicemap -m - | grep -v '^(fd[0-9]\+)' || true)"
 475           devices="$(echo "$device_map" | cut -f2)"
 476           if dpkg --compare-versions "$2" lt 1.98+20100702-1 && \
 477              test "$(uname -s)" = Linux && [ -z "$wubi_device" ]; then
 478             # Migrate to new by-id naming scheme.
 479             db_get grub-pc/install_devices
 480             old_devices="$(echo "$RET" | sed 's/, / /g')"
 481             new_devices=
 482             # Common-case optimisation: if the list of devices is
 483             # identical to the LHS of grub-mkdevicemap's output, then
 484             # there's no point asking again; just install to all disks.
 485             # (This handles e.g. "(hd0)" with one disk.)
 486             if [ "$(echo "$device_map" | cut -f1 | sort)" = \
 487                  "$(echo "$old_devices" | xargs -n1 | sort)" ]; then
 488               new_devices="$(devices_to_ids $devices)"
 489               db_set grub-pc/install_devices "$new_devices"
 490             # Alternatively, we might be installing to a single partition
 491             # on a single disk, and we can deal with that too if there's
 492             # only one available disk and it has an appropriate partition.
 493             # This doesn't necessarily work for multiple disks because now
 494             # the order matters.
 495             elif [ "$(echo "$device_map" | wc -l)" = 1 ] && \
 496                  [ "$(echo "$old_devices" | wc -w)" = 1 ] && \
 497                  echo "$old_devices" | grep -q ,; then
 498               old_device="${old_devices#(}"
 499               old_device="${old_device%)}"
 500               old_disk="${old_device%,*}"
 501               old_partition="${old_device##*,}"
 502               new_device="$(echo "$device_map" | grep "^($old_disk)" | \
 503                             cut -f2)"
 504               new_device="$(device_to_id $new_device)"
 505               if [ "$new_device" ]; then
 506                 new_device="$new_device-part$old_partition"
 507                 # Run through device_to_id again to check for existence.
 508                 new_device="$(device_to_id $new_device)"
 509               fi
 510               if [ "$new_device" ]; then
 511                 new_devices="$new_device"
 512                 db_set grub-pc/install_devices "$new_device"
 513               fi
 514             fi
 515             if [ -z "$new_devices" ]; then
 516               new_devices="$(devices_to_ids $old_devices)"
 517               db_set grub-pc/install_devices "$new_devices"
 518               # Common-case optimisation: if all devices are translatable
 519               # to by-id and the number of devices there is the same as
 520               # the number of devices GRUB can see, then there's no point
 521               # asking again.  (This handles e.g. "/dev/sda" with one
 522               # disk.)
 523               old_devices_count="$(echo "$old_devices" | wc -w)"
 524               new_devices_count="$(echo "$new_devices" | wc -w)"
 525               devices_count="$(echo "$devices" | wc -w)"
 526               if [ "$old_devices_count" != "$new_devices_count" ] || \
 527                  [ "$new_devices_count" != "$devices_count" ]; then
 528                 db_fset grub-pc/install_devices seen false
 529                 db_fset grub-pc/install_devices_empty seen false
 530               fi
 531             fi
 532           else
 533             db_get grub-pc/install_devices
 534             valid=1
 535             for device in $RET; do
 536               if [ ! -e "${device%,}" ]; then
 537                 valid=0
 538                 break
 539               fi
 540             done
 541             if [ "$valid" = 0 ]; then
 542               question=grub-pc/install_devices_disks_changed
 543               priority=critical
 544               db_set "$question" "$RET"
 545               db_fset "$question" seen false
 546               db_fset grub-pc/install_devices_empty seen false
 547             fi
 548           fi
 549
 550           while :; do
 551             ids=
 552             descriptions=
 553             partitions="$(usable_partitions)"
 554             for device in $devices; do
 555               disk_id="$(device_to_id "$device" || true)"
 556               if [ "$disk_id" ]; then
 557                 ids="${ids:+$ids, }$disk_id"
 558                 describe_disk "$(readlink -f "$device")" "$disk_id"
 559                 RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 560                 descriptions="${descriptions:+$descriptions, }$RET"
 561                 for partition_pair in $partitions; do
 562                   partition_id="${partition_pair#*:}"
 563                   if [ "${partition_id#$disk_id-part}" != "$partition_id" ]; then
 564                     ids="${ids:+$ids, }$partition_id"
 565                     describe_partition "$(readlink -f "$device")" "$(readlink -f "$partition_id")" "$partition_id" "$(get_mountpoint "${partition_pair%%:*}")"
 566                     RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 567                     descriptions="${descriptions:+$descriptions, }$RET"
 568                   fi
 569                 done
 570               fi
 571             done
 572             # Some "partitions" may in fact be at the disk level, e.g. RAID.
 573             # List these as well if they haven't already been listed.
 574             for partition_pair in $partitions; do
 575               partition_id="${partition_pair#*:}"
 576               if [ "${partition_id#*-part}" = "$partition_id" ]; then
 577                 case ", $ids, " in
 578                   ", $partition_id, ") ;;
 579                   *)
 580                     ids="${ids:+$ids, }$partition_id"
 581                     describe_disk "$(readlink -f "$partition_id")" "$partition_id"
 582                     RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 583                     descriptions="${descriptions:+$descriptions, }$RET"
 584                     ;;
 585                 esac
 586               fi
 587             done
 588             db_subst "$question" RAW_CHOICES "$ids"
 589             db_subst "$question" CHOICES "$descriptions"
 590             db_input "$priority" "$question" || true
 591             db_go
 592             db_get "$question"
 593             failed_devices=
 594             for i in `echo $RET | sed -e 's/, / /g'` ; do
 595               real_device="$(readlink -f "$i")"
 596               if grub-install --target=i386-pc --force --no-floppy $real_device ; then
 597                 # We just installed GRUB 2; then also generate grub.cfg.
 598                 touch /boot/grub/grub.cfg
 599               else
 600                 failed_devices="$failed_devices $real_device"
 601               fi
 602             done
 603
 604             if [ "$question" != grub-pc/install_devices ]; then
 605               db_set grub-pc/install_devices "$RET"
 606               db_fset grub-pc/install_devices seen true
 607             fi
 608
 609             if [ "$failed_devices" ]; then
 610               if [ "$UPGRADE_FROM_GRUB_LEGACY" ]; then
 611                 db_subst grub-pc/install_devices_failed_upgrade FAILED_DEVICES "$failed_devices"
 612                 db_fset grub-pc/install_devices_failed_upgrade seen false
 613                 if db_input critical grub-pc/install_devices_failed_upgrade; then
 614                   db_go
 615                   db_get grub-pc/install_devices_failed_upgrade
 616                   if [ "$RET" = true ]; then
 617                     db_fset "$question" seen false
 618                     db_fset grub-pc/install_devices_failed_upgrade seen false
 619                     continue
 620                   else
 621                     exit 1
 622                   fi
 623                 else
 624                   exit 1 # noninteractive
 625                 fi
 626               else
 627                 db_subst grub-pc/install_devices_failed FAILED_DEVICES "$failed_devices"
 628                 db_fset grub-pc/install_devices_failed seen false
 629                 if db_input critical grub-pc/install_devices_failed; then
 630                   db_go
 631                   db_get grub-pc/install_devices_failed
 632                   if [ "$RET" = true ]; then
 633                     break
 634                   else
 635                     db_fset "$question" seen false
 636                     db_fset grub-pc/install_devices_failed seen false
 637                     continue
 638                   fi
 639                 else
 640                   break # noninteractive
 641                 fi
 642               fi
 643             fi
 644
 645             db_get grub-pc/install_devices
 646             if [ -z "$RET" ]; then
 647               # Reset the seen flag if the current answer is false, since
 648               # otherwise we'll loop with no indication of why.
 649               db_get grub-pc/install_devices_empty
 650               if [ "$RET" = false ]; then
 651                 db_fset grub-pc/install_devices_empty seen false
 652               fi
 653               if db_input critical grub-pc/install_devices_empty; then
 654                 db_go
 655                 db_get grub-pc/install_devices_empty
 656                 if [ "$RET" = true ]; then
 657                   break
 658                 else
 659                   db_fset "$question" seen false
 660                   db_fset grub-pc/install_devices_empty seen false
 661                 fi
 662               else
 663                 break # noninteractive
 664               fi
 665             else
 666               break
 667             fi
 668           done
 669         fi
 670
 671         # /boot/grub/ has more chances of being accessible by GRUB
 672         for i in /usr/share/grub/unicode.pf2 ; do
 673           if test -e $i ; then
 674             cp $i /boot/grub/
 675           fi
 676         done
 677
 678         if [ "$fix_mixed_system" ]; then
 679           # These never contain any valuable information, and they aren't
 680           # useful for boot any more, since we just overwrote MBR/PBR.
 681           rm -f /boot/grub/{{xfs,reiserfs,e2fs,fat,jfs,minix}_stage1_5,stage{1,2}}
 682           # Remove marker file used to indicate that grub-install was run
 683           # rather than upgrade-from-grub-legacy.  Since stage2 has been
 684           # removed, we don't need this any more.
 685           rm -f /boot/grub/grub2-installed
 686         fi
 687       ;;
 688
 689       grub-efi-ia32|grub-efi-amd64|grub-efi-ia64|grub-efi-arm|grub-efi-arm64)
 690         bootloader_id="$(config_item GRUB_DISTRIBUTOR | tr A-Z a-z | \
 691                          cut -d' ' -f1)"
 692         case $bootloader_id in
 693           kubuntu) bootloader_id=ubuntu ;;
 694         esac
 695         if [ "$bootloader_id" ] && [ -d "/boot/efi/EFI/$bootloader_id" ]; then
 696           case @PACKAGE@ in
 697             grub-efi-ia32)  target=i386-efi ;;
 698             grub-efi-amd64) target=x86_64-efi ;;
 699             grub-efi-ia64)  target=ia64-efi ;;
 700             grub-efi-arm)   target=arm-efi ;;
 701             grub-efi-arm64) target=arm64-efi ;;
 702           esac
 703           db_get grub2/force_efi_extra_removable
 704           if [ "$RET" = true ]; then
 705             FORCE_EXTRA_REMOVABLE="--force-extra-removable"
 706           fi
 707           NO_NVRAM="$(no_nvram_arg)"
 708           run_grub_install --target="$target" "$FORCE_EXTRA_REMOVABLE" "$NO_NVRAM"
 709         fi
 710
 711         # /boot/grub/ has more chances of being accessible by GRUB
 712         for i in /usr/share/grub/unicode.pf2 ; do
 713           if test -e $i ; then
 714             cp $i /boot/grub/
 715           fi
 716         done
 717
 718         if type update-secureboot-policy >/dev/null 2>&1; then
 719           update-secureboot-policy || true
 720         fi
 721       ;;
 722
 723       grub-ieee1275)
 724         case $(dpkg --print-architecture) in
 725           powerpc|ppc64|ppc64el)
 726             # Output may be empty; if so, just update the core image but
 727             # don't install it to any PReP partition.
 728             prep_bootdev="$(/usr/lib/grub/powerpc-ieee1275/prep-bootdev)"
 729             NO_NVRAM="$(no_nvram_arg)"
 730             run_grub_install --target=powerpc-ieee1275 $prep_bootdev "$NO_NVRAM"
 731           ;;
 732         esac
 733       ;;
 734
 735       grub-yeeloong)
 736         run_grub_install --target=mipsel-loongson
 737       ;;
 738
 739       grub-xen)
 740         # Install for x86_64 regardless of arch, since a 32-bit userspace can still boot with a 64-bit kernel.
 741         mkdir -p /boot/xen
 742         run_grub_install --target=x86_64-xen
 743         case $(dpkg --print-architecture) in
 744           i386)
 745             run_grub_install --target=i386-xen
 746           ;;
 747         esac
 748       ;;
 749     esac
 750
 751     # If grub.cfg has been generated, update it.
 752     if test -e /boot/grub/grub.cfg && ! running_in_container; then
 753       update-grub 3>&-
 754     fi
 755   ;;
 756   abort-upgrade|abort-remove|abort-deconfigure)
 757   ;;
 758   *)
 759     echo "postinst called with unknown argument \`$1'" >&2
 760     exit 1
 761   ;;
 762 esac
 763
 764 # dh_installdeb will replace this with shell code automatically
 765 # generated by other debhelper scripts.
 766
 767 #DEBHELPER#
 768
 769 exit 0