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 maybe_udevadm()
 188 {
 189   if which udevadm >/dev/null 2>&1; then
 190     udevadm "$@" || true
 191   fi
 192 }
 193
 194 # Returns value in $RET, like a debconf command.
 195 describe_disk()
 196 {
 197   local disk id sysfs_path disk_basename size model
 198   disk="$1"
 199   id="$2"
 200
 201   model=
 202   case $(uname -s) in
 203     Linux)
 204       sysfs_path="$(maybe_udevadm info -n "$disk" -q path)"
 205       if [ -z "$sysfs_path" ]; then
 206         sysfs_path="/block/$(printf %s "${disk#/dev/}" | sed 's,/,!,g')"
 207       fi
 208       size="$(sysfs_size "/sys$sysfs_path")"
 209
 210       model="$(maybe_udevadm info -n "$disk" -q property | sed -n 's/^ID_MODEL=//p')"
 211       if [ -z "$model" ]; then
 212         model="$(maybe_udevadm info -n "$disk" -q property | sed -n 's/^DM_NAME=//p')"
 213         if [ -z "$model" ]; then
 214           model="$(maybe_udevadm info -n "$disk" -q property | sed -n 's/^MD_NAME=//p')"
 215           if [ -z "$model" ] && which dmsetup >/dev/null 2>&1; then
 216             model="$(dmsetup info -c --noheadings -o name "$disk" 2>/dev/null || true)"
 217           fi
 218         fi
 219       fi
 220     ;;
 221     GNU/kFreeBSD)
 222       disk_basename=$(basename "$disk")
 223       size="$(camcontrol_size "$disk_basename")"
 224       model="$(camcontrol inquiry "$disk_basename" | sed -ne "s/^pass0: <\([^>]*\)>.*/\1/p")"
 225     ;;
 226   esac
 227
 228   [ "$model" ] || model='???'
 229
 230   db_subst grub-pc/disk_description DEVICE "$disk"
 231   db_subst grub-pc/disk_description SIZE "$size"
 232   db_subst grub-pc/disk_description MODEL "$model"
 233   db_metaget grub-pc/disk_description description
 234 }
 235
 236 # Returns value in $RET, like a debconf command.
 237 describe_partition()
 238 {
 239   local disk part id path sysfs_path diskbase partbase size
 240   disk="$1"
 241   part="$2"
 242   id="$3"
 243   path="$4"
 244
 245   sysfs_path="$(maybe_udevadm info -n "$part" -q path)"
 246   if [ -z "$sysfs_path" ]; then
 247     diskbase="${disk#/dev/}"
 248     diskbase="$(printf %s "$diskbase" | sed 's,/,!,g')"
 249     partbase="${part#/dev/}"
 250     partbase="$(printf %s "$partbase" | sed 's,/,!,g')"
 251     sysfs_path="/block/$diskbase/$partbase"
 252   fi
 253   size="$(sysfs_size "/sys$sysfs_path")"
 254
 255   db_subst grub-pc/partition_description DEVICE "$part"
 256   db_subst grub-pc/partition_description SIZE "$size"
 257   db_subst grub-pc/partition_description PATH "$path"
 258   db_metaget grub-pc/partition_description description
 259 }
 260
 261 usable_partitions()
 262 {
 263   local last_partition path partition partition_id
 264
 265   last_partition=
 266   for path in / /boot /boot/grub; do
 267     partition="$(grub-probe -t device "$path" || true)"
 268     if [ -z "$partition" ] || [ "$partition" = "$last_partition" ]; then
 269       continue
 270     fi
 271     partition_id="$(device_to_id "$partition" || true)"
 272     echo "$path:$partition_id"
 273     last_partition="$partition"
 274   done | sort -t: -k2
 275 }
 276
 277 get_mountpoint()
 278 {
 279   local relpath boot_mountpoint
 280
 281   relpath="$(grub-mkrelpath "$1")"
 282   boot_mountpoint="${1#$relpath}"
 283   echo "${boot_mountpoint:-/}"
 284 }
 285
 286 config_item()
 287 {
 288   for x in /etc/default/grub /etc/default/grub.d/*.cfg; do
 289     if [ -e "$x" ]; then
 290       . "$x"
 291     fi
 292   done
 293   if [ "$(eval echo "\${$1+set}")" = set ]; then
 294     eval echo "\$$1"
 295   else
 296     return
 297   fi
 298 }
 299
 300 running_in_container()
 301 {
 302   type systemd-detect-virt >/dev/null 2>&1 && systemd-detect-virt --quiet --container
 303 }
 304
 305 no_nvram_arg() {
 306     db_get grub2/update_nvram
 307     if [ "$RET" = false ]; then
 308         echo "--no-nvram"
 309     fi
 310 }
 311
 312 run_grub_install()
 313 {
 314     if ! grub-install $@ ; then
 315         echo "Failed: grub-install $@" >&2
 316         echo "WARNING: Bootloader is not properly installed, system may not be bootable" >&2
 317     fi
 318 }
 319
 320 case "$1" in
 321   configure)
 322     . /usr/share/debconf/confmodule
 323
 324     devicemap_regenerated=
 325
 326     if egrep -q '^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub' /etc/kernel-img.conf 2>/dev/null; then
 327       echo 'Removing update-grub hooks from /etc/kernel-img.conf in favour of' >&2
 328       echo '/etc/kernel/ hooks.' >&2
 329       sed -ri /etc/kernel-img.conf -e '\%^[[:space:]]*post(inst|rm)_hook[[:space:]]*=[[:space:]]*(/sbin/|/usr/sbin/)?update-grub%d'
 330     fi
 331
 332     mkdir -p /boot/grub
 333
 334     case @PACKAGE@ in
 335       grub-pc)
 336         if test -e /boot/grub/device.map && ! test -e /boot/grub/core.img && \
 337            ! test -e /boot/grub/@FIRST_CPU_PLATFORM@/core.img; then
 338           # Looks like your device.map was generated by GRUB Legacy, which
 339           # used to generate broken device.map (see #422851).  Avoid the risk
 340           # by regenerating it.
 341           grub-mkdevicemap --no-floppy
 342           devicemap_regenerated=1
 343         fi
 344       ;;
 345     esac
 346
 347     if test -z "$devicemap_regenerated" && test -s /boot/grub/device.map && \
 348        dpkg --compare-versions "$2" lt-nl 1.98+20100702-1 && \
 349        test "$(uname -s)" = Linux; then
 350       # Earlier versions of GRUB used unstable device names in device.map,
 351       # which caused a variety of problems.  There is some risk associated with
 352       # regenerating it (so we prompt the user if it's non-trivial), but on the
 353       # whole it's less risky to move to /dev/disk/by-id/.
 354       devicemap_lines="$(egrep -v '^[[:space:]]+#' /boot/grub/device.map | wc -l)"
 355       grub-mkdevicemap --no-floppy
 356       devicemap_regenerated=1
 357       if test "$devicemap_lines" != 1; then
 358         db_input critical grub2/device_map_regenerated || true
 359         db_go || true
 360       fi
 361     fi
 362
 363     if test -z "$devicemap_regenerated" && \
 364        dpkg --compare-versions "$2" lt-nl 1.99~20101210-2 && \
 365        grep -qs /md-uuid- /boot/grub/device.map; then
 366       echo "Removing MD devices from device.map, since the BIOS cannot read from these." >&2
 367       sed -i '/\/md-uuid-/d' /boot/grub/device.map
 368     fi
 369
 370     tmp_default_grub="$(mktemp -t grub.XXXXXXXXXX)"
 371     trap "rm -f ${tmp_default_grub}" EXIT
 372     cp -p /usr/share/grub/default/grub ${tmp_default_grub}
 373
 374     merge_debconf_into_conf "$tmp_default_grub" GRUB_CMDLINE_LINUX grub2/linux_cmdline
 375     merge_debconf_into_conf "$tmp_default_grub" GRUB_CMDLINE_LINUX_DEFAULT grub2/linux_cmdline_default
 376
 377     case @PACKAGE@ in
 378       grub-pc)
 379         merge_debconf_into_conf "$tmp_default_grub" GRUB_TIMEOUT grub-pc/timeout
 380         sed -i -e 's/^\(GRUB_TIMEOUT=\)"\([0-9][0-9]*\)"/\1\2/' "$tmp_default_grub"
 381         db_get grub-pc/hidden_timeout
 382         if [ "$RET" = false ]; then
 383           sed -i -e 's/^GRUB_HIDDEN_TIMEOUT=/#&/' "$tmp_default_grub"
 384         fi
 385       ;;
 386     esac
 387
 388     ucf --three-way --debconf-ok --sum-file=/usr/share/grub/default/grub.md5sum ${tmp_default_grub} /etc/default/grub
 389     package="$(ucfq --with-colons /etc/default/grub | cut -d : -f 2)"
 390     if echo $package | grep -q "^grub-" ; then
 391       ucfr --force @PACKAGE@ /etc/default/grub
 392     else
 393       ucfr @PACKAGE@ /etc/default/grub
 394     fi
 395
 396     case @PACKAGE@ in
 397       grub-pc)
 398
 399         fix_mixed_system=
 400         if test -e /boot/grub/stage2 && test -e /boot/grub/menu.lst && \
 401            ! test -e /boot/grub/grub2-installed && \
 402            test -z "$UPGRADE_FROM_GRUB_LEGACY"; then
 403           # Unfortunately, it's still possible that the user upgraded fully
 404           # to GRUB 2 in some way other than running
 405           # upgrade-from-grub-legacy; perhaps they ran grub-install by hand
 406           # for some reason.  It's really quite difficult to detect this
 407           # situation, because the only difference between this and a
 408           # working chainloaded setup is that in this case grub-setup has
 409           # been run.  So, to try to tell the difference, we scan the boot
 410           # sectors of all disks for a GRUB 2 boot sector.  Hopefully this
 411           # won't cause too much to explode, since I can't think of a better
 412           # method.
 413           grub2_disks=
 414           for disk in $(all_disks); do
 415             if scan_grub2 "$disk"; then
 416               grub2_disks="${grub2_disks:+$grub2_disks }$(readlink -f "$disk")"
 417             fi
 418           done
 419           if [ "$grub2_disks" ]; then
 420             # No || true here; it's vital that the user sees this, and it's
 421             # better to throw an error than to do the wrong thing.
 422             db_subst grub-pc/mixed_legacy_and_grub2 DISKS "$grub2_disks"
 423             db_fset grub-pc/mixed_legacy_and_grub2 seen false
 424             db_input critical grub-pc/mixed_legacy_and_grub2
 425             db_go
 426             db_get grub-pc/mixed_legacy_and_grub2
 427             if [ "$RET" = true ]; then
 428               db_reset grub-pc/install_devices
 429               UPGRADE_FROM_GRUB_LEGACY=1
 430               fix_mixed_system=1
 431               # Fall through to normal installation logic.
 432             fi
 433           fi
 434         fi
 435
 436         # Make sure that Wubi users never see confusing device prompts.
 437         # Wubi is a very specialised hack that does complicated things with
 438         # grub-install diversions to create an image that's chained from the
 439         # Windows boot loader to boot an operating system from a file on a
 440         # Windows file system.  In these circumstances, prompting for where
 441         # to install GRUB is not going to help anyone.
 442         wubi_device="$(get_wubi_device)" || true
 443         if [ "$wubi_device" ]; then
 444           db_set grub-pc/install_devices "$wubi_device"
 445           db_fset grub-pc/install_devices seen true
 446         fi
 447
 448         if test -e /boot/grub/stage2 && test -e /boot/grub/menu.lst && \
 449            ! test -e /boot/grub/grub2-installed && \
 450            test -z "$UPGRADE_FROM_GRUB_LEGACY"; then
 451           db_get grub-pc/chainload_from_menu.lst
 452           if $RET ; then
 453             # Create core.img (but do not risk writing to MBR).
 454             # Using grub-probe instead of "(hd0)" avoids (UUID=) hack slowness
 455             # in case /boot/grub is not on (hd0) in device.map.
 456             echo "Generating core.img" >&2
 457             grub-install --target=i386-pc --no-floppy --grub-setup=/bin/true "$(grub-probe -t drive /boot/grub)" > /dev/null
 458
 459             # Update menu.lst to reflect that:
 460             # - core.img is present now
 461             # - core.img has to be the first option
 462             echo "Saving menu.lst backup in /boot/grub/menu.lst_backup_by_grub2_postinst" >&2
 463             cp /boot/grub/menu.lst{,_backup_by_grub2_postinst}
 464             echo "Running update-grub Legacy to hook our core.img in it" >&2
 465             LET_US_TRY_GRUB_2=true /usr/lib/grub-legacy/update-grub 2>&1 | sed -e "s/^/    /g" >&2
 466             # We just hooked GRUB 2 in menu.lst; then also generate grub.cfg.
 467             touch /boot/grub/grub.cfg
 468           fi
 469         elif running_in_container; then
 470           # Skip grub-install in containers.
 471           :
 472         elif test -z "$2" || test -e /boot/grub/core.img || \
 473              test -e /boot/grub/@FIRST_CPU_PLATFORM@/core.img || \
 474              test "$UPGRADE_FROM_GRUB_LEGACY" || test "$wubi_device"; then
 475           question=grub-pc/install_devices
 476           priority=high
 477           device_map="$(grub-mkdevicemap -m - | grep -v '^(fd[0-9]\+)' || true)"
 478           devices="$(echo "$device_map" | cut -f2)"
 479           if dpkg --compare-versions "$2" lt 1.98+20100702-1 && \
 480              test "$(uname -s)" = Linux && [ -z "$wubi_device" ]; then
 481             # Migrate to new by-id naming scheme.
 482             db_get grub-pc/install_devices
 483             old_devices="$(echo "$RET" | sed 's/, / /g')"
 484             new_devices=
 485             # Common-case optimisation: if the list of devices is
 486             # identical to the LHS of grub-mkdevicemap's output, then
 487             # there's no point asking again; just install to all disks.
 488             # (This handles e.g. "(hd0)" with one disk.)
 489             if [ "$(echo "$device_map" | cut -f1 | sort)" = \
 490                  "$(echo "$old_devices" | xargs -n1 | sort)" ]; then
 491               new_devices="$(devices_to_ids $devices)"
 492               db_set grub-pc/install_devices "$new_devices"
 493             # Alternatively, we might be installing to a single partition
 494             # on a single disk, and we can deal with that too if there's
 495             # only one available disk and it has an appropriate partition.
 496             # This doesn't necessarily work for multiple disks because now
 497             # the order matters.
 498             elif [ "$(echo "$device_map" | wc -l)" = 1 ] && \
 499                  [ "$(echo "$old_devices" | wc -w)" = 1 ] && \
 500                  echo "$old_devices" | grep -q ,; then
 501               old_device="${old_devices#(}"
 502               old_device="${old_device%)}"
 503               old_disk="${old_device%,*}"
 504               old_partition="${old_device##*,}"
 505               new_device="$(echo "$device_map" | grep "^($old_disk)" | \
 506                             cut -f2)"
 507               new_device="$(device_to_id $new_device)"
 508               if [ "$new_device" ]; then
 509                 new_device="$new_device-part$old_partition"
 510                 # Run through device_to_id again to check for existence.
 511                 new_device="$(device_to_id $new_device)"
 512               fi
 513               if [ "$new_device" ]; then
 514                 new_devices="$new_device"
 515                 db_set grub-pc/install_devices "$new_device"
 516               fi
 517             fi
 518             if [ -z "$new_devices" ]; then
 519               new_devices="$(devices_to_ids $old_devices)"
 520               db_set grub-pc/install_devices "$new_devices"
 521               # Common-case optimisation: if all devices are translatable
 522               # to by-id and the number of devices there is the same as
 523               # the number of devices GRUB can see, then there's no point
 524               # asking again.  (This handles e.g. "/dev/sda" with one
 525               # disk.)
 526               old_devices_count="$(echo "$old_devices" | wc -w)"
 527               new_devices_count="$(echo "$new_devices" | wc -w)"
 528               devices_count="$(echo "$devices" | wc -w)"
 529               if [ "$old_devices_count" != "$new_devices_count" ] || \
 530                  [ "$new_devices_count" != "$devices_count" ]; then
 531                 db_fset grub-pc/install_devices seen false
 532                 db_fset grub-pc/install_devices_empty seen false
 533               fi
 534             fi
 535           else
 536             db_get grub-pc/install_devices
 537             valid=1
 538             for device in $RET; do
 539               if [ ! -e "${device%,}" ]; then
 540                 valid=0
 541                 break
 542               fi
 543             done
 544             if [ "$valid" = 0 ]; then
 545               question=grub-pc/install_devices_disks_changed
 546               priority=critical
 547               db_set "$question" "$RET"
 548               db_fset "$question" seen false
 549               db_fset grub-pc/install_devices_empty seen false
 550             fi
 551           fi
 552
 553           while :; do
 554             ids=
 555             descriptions=
 556             partitions="$(usable_partitions)"
 557             for device in $devices; do
 558               disk_id="$(device_to_id "$device" || true)"
 559               if [ "$disk_id" ]; then
 560                 ids="${ids:+$ids, }$disk_id"
 561                 describe_disk "$(readlink -f "$device")" "$disk_id"
 562                 RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 563                 descriptions="${descriptions:+$descriptions, }$RET"
 564                 for partition_pair in $partitions; do
 565                   partition_id="${partition_pair#*:}"
 566                   if [ "${partition_id#$disk_id-part}" != "$partition_id" ]; then
 567                     ids="${ids:+$ids, }$partition_id"
 568                     describe_partition "$(readlink -f "$device")" "$(readlink -f "$partition_id")" "$partition_id" "$(get_mountpoint "${partition_pair%%:*}")"
 569                     RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 570                     descriptions="${descriptions:+$descriptions, }$RET"
 571                   fi
 572                 done
 573               fi
 574             done
 575             # Some "partitions" may in fact be at the disk level, e.g. RAID.
 576             # List these as well if they haven't already been listed.
 577             for partition_pair in $partitions; do
 578               partition_id="${partition_pair#*:}"
 579               if [ "${partition_id#*-part}" = "$partition_id" ]; then
 580                 case ", $ids, " in
 581                   ", $partition_id, ") ;;
 582                   *)
 583                     ids="${ids:+$ids, }$partition_id"
 584                     describe_disk "$(readlink -f "$partition_id")" "$partition_id"
 585                     RET="$(printf %s "$RET" | sed 's/,/\\,/g')"
 586                     descriptions="${descriptions:+$descriptions, }$RET"
 587                     ;;
 588                 esac
 589               fi
 590             done
 591             db_subst "$question" RAW_CHOICES "$ids"
 592             db_subst "$question" CHOICES "$descriptions"
 593             db_input "$priority" "$question" || true
 594             db_go
 595             db_get "$question"
 596             failed_devices=
 597             for i in `echo $RET | sed -e 's/, / /g'` ; do
 598               real_device="$(readlink -f "$i")"
 599               if grub-install --target=i386-pc --force --no-floppy $real_device ; then
 600                 # We just installed GRUB 2; then also generate grub.cfg.
 601                 touch /boot/grub/grub.cfg
 602               else
 603                 failed_devices="$failed_devices $real_device"
 604               fi
 605             done
 606
 607             if [ "$question" != grub-pc/install_devices ]; then
 608               db_set grub-pc/install_devices "$RET"
 609               db_fset grub-pc/install_devices seen true
 610             fi
 611
 612             if [ "$failed_devices" ]; then
 613               if [ "$UPGRADE_FROM_GRUB_LEGACY" ]; then
 614                 db_subst grub-pc/install_devices_failed_upgrade FAILED_DEVICES "$failed_devices"
 615                 db_fset grub-pc/install_devices_failed_upgrade seen false
 616                 if db_input critical grub-pc/install_devices_failed_upgrade; then
 617                   db_go
 618                   db_get grub-pc/install_devices_failed_upgrade
 619                   if [ "$RET" = true ]; then
 620                     db_fset "$question" seen false
 621                     db_fset grub-pc/install_devices_failed_upgrade seen false
 622                     continue
 623                   else
 624                     exit 1
 625                   fi
 626                 else
 627                   exit 1 # noninteractive
 628                 fi
 629               else
 630                 db_subst grub-pc/install_devices_failed FAILED_DEVICES "$failed_devices"
 631                 db_fset grub-pc/install_devices_failed seen false
 632                 if db_input critical grub-pc/install_devices_failed; then
 633                   db_go
 634                   db_get grub-pc/install_devices_failed
 635                   if [ "$RET" = true ]; then
 636                     break
 637                   else
 638                     db_fset "$question" seen false
 639                     db_fset grub-pc/install_devices_failed seen false
 640                     continue
 641                   fi
 642                 else
 643                   break # noninteractive
 644                 fi
 645               fi
 646             fi
 647
 648             db_get grub-pc/install_devices
 649             if [ -z "$RET" ]; then
 650               # Reset the seen flag if the current answer is false, since
 651               # otherwise we'll loop with no indication of why.
 652               db_get grub-pc/install_devices_empty
 653               if [ "$RET" = false ]; then
 654                 db_fset grub-pc/install_devices_empty seen false
 655               fi
 656               if db_input critical grub-pc/install_devices_empty; then
 657                 db_go
 658                 db_get grub-pc/install_devices_empty
 659                 if [ "$RET" = true ]; then
 660                   break
 661                 else
 662                   db_fset "$question" seen false
 663                   db_fset grub-pc/install_devices_empty seen false
 664                 fi
 665               else
 666                 break # noninteractive
 667               fi
 668             else
 669               break
 670             fi
 671           done
 672         fi
 673
 674         # /boot/grub/ has more chances of being accessible by GRUB
 675         for i in /usr/share/grub/unicode.pf2 ; do
 676           if test -e $i ; then
 677             cp $i /boot/grub/
 678           fi
 679         done
 680
 681         if [ "$fix_mixed_system" ]; then
 682           # These never contain any valuable information, and they aren't
 683           # useful for boot any more, since we just overwrote MBR/PBR.
 684           rm -f /boot/grub/{{xfs,reiserfs,e2fs,fat,jfs,minix}_stage1_5,stage{1,2}}
 685           # Remove marker file used to indicate that grub-install was run
 686           # rather than upgrade-from-grub-legacy.  Since stage2 has been
 687           # removed, we don't need this any more.
 688           rm -f /boot/grub/grub2-installed
 689         fi
 690       ;;
 691
 692       grub-efi-ia32|grub-efi-amd64|grub-efi-ia64|grub-efi-arm|grub-efi-arm64)
 693         bootloader_id="$(config_item GRUB_DISTRIBUTOR | tr A-Z a-z | \
 694                          cut -d' ' -f1)"
 695         case $bootloader_id in
 696           kubuntu) bootloader_id=ubuntu ;;
 697         esac
 698         if [ "$bootloader_id" ] && [ -d "/boot/efi/EFI/$bootloader_id" ]; then
 699           case @PACKAGE@ in
 700             grub-efi-ia32)  target=i386-efi ;;
 701             grub-efi-amd64) target=x86_64-efi ;;
 702             grub-efi-ia64)  target=ia64-efi ;;
 703             grub-efi-arm)   target=arm-efi ;;
 704             grub-efi-arm64) target=arm64-efi ;;
 705           esac
 706           db_get grub2/force_efi_extra_removable
 707           if [ "$RET" = true ]; then
 708             FORCE_EXTRA_REMOVABLE="--force-extra-removable"
 709           fi
 710           NO_NVRAM="$(no_nvram_arg)"
 711           run_grub_install --target="$target" "$FORCE_EXTRA_REMOVABLE" "$NO_NVRAM"
 712         fi
 713
 714         # /boot/grub/ has more chances of being accessible by GRUB
 715         for i in /usr/share/grub/unicode.pf2 ; do
 716           if test -e $i ; then
 717             cp $i /boot/grub/
 718           fi
 719         done
 720
 721         if type update-secureboot-policy >/dev/null 2>&1; then
 722           update-secureboot-policy || true
 723         fi
 724       ;;
 725
 726       grub-ieee1275)
 727         case $(dpkg --print-architecture) in
 728           powerpc|ppc64|ppc64el)
 729             # Output may be empty; if so, just update the core image but
 730             # don't install it to any PReP partition.
 731             prep_bootdev="$(/usr/lib/grub/powerpc-ieee1275/prep-bootdev)"
 732             NO_NVRAM="$(no_nvram_arg)"
 733             run_grub_install --target=powerpc-ieee1275 $prep_bootdev "$NO_NVRAM"
 734           ;;
 735         esac
 736       ;;
 737
 738       grub-yeeloong)
 739         run_grub_install --target=mipsel-loongson
 740       ;;
 741
 742       grub-xen)
 743         # Install for x86_64 regardless of arch, since a 32-bit userspace can still boot with a 64-bit kernel.
 744         mkdir -p /boot/xen
 745         run_grub_install --target=x86_64-xen
 746         case $(dpkg --print-architecture) in
 747           i386)
 748             run_grub_install --target=i386-xen
 749           ;;
 750         esac
 751       ;;
 752     esac
 753
 754     # If grub.cfg has been generated, update it.
 755     if test -e /boot/grub/grub.cfg && ! running_in_container; then
 756       update-grub 3>&-
 757     fi
 758   ;;
 759   abort-upgrade|abort-remove|abort-deconfigure)
 760   ;;
 761   *)
 762     echo "postinst called with unknown argument \`$1'" >&2
 763     exit 1
 764   ;;
 765 esac
 766
 767 # dh_installdeb will replace this with shell code automatically
 768 # generated by other debhelper scripts.
 769
 770 #DEBHELPER#
 771
 772 exit 0