scripts/boot.sh

   1 #!/bin/sh
   2
   3 # set -e
   4
   5 for _SCRIPT in /lib/live/boot/*
   6 do
   7         if [ -e "${_SCRIPT}" ]
   8         then
   9                 . ${_SCRIPT}
  10         fi
  11 done
  12
  13 export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
  14
  15 echo "/root/lib" >> /etc/ld.so.conf
  16 echo "/root/usr/lib" >> /etc/ld.so.conf
  17
  18 mountpoint="/live/image"
  19 alt_mountpoint="/media"
  20 LIVE_MEDIA_PATH="live"
  21
  22 HOSTNAME="host"
  23
  24 mkdir -p "${mountpoint}"
  25 tried="/tmp/tried"
  26
  27 # Create /etc/mtab for debug purpose and future syncs
  28 if [ ! -d /etc ]
  29 then
  30         mkdir /etc/
  31 fi
  32
  33 if [ ! -f /etc/mtab ]
  34 then
  35         touch /etc/mtab
  36 fi
  37
  38 if [ ! -x "/bin/fstype" ]
  39 then
  40         # klibc not in path -> not in initramfs
  41         export PATH="${PATH}:/usr/lib/klibc/bin"
  42 fi
  43
  44 # handle upgrade path from old udev (using udevinfo) to
  45 # recent versions of udev (using udevadm info)
  46 if [ -x /sbin/udevadm ]
  47 then
  48         udevinfo='/sbin/udevadm info'
  49 else
  50         udevinfo='udevinfo'
  51 fi
  52
  53 old_root_overlay_label="live-rw"
  54 old_home_overlay_label="home-rw"
  55 custom_overlay_label="custom-ov"
  56 root_snapshot_label="live-sn"
  57 old_root_snapshot_label="live-sn"
  58 home_snapshot_label="home-sn"
  59 persistence_list="live-persistence.conf"
  60
  61 if [ ! -f /live.vars ]
  62 then
  63         touch /live.vars
  64 fi
  65
  66 is_live_path ()
  67 {
  68         DIRECTORY="${1}"
  69
  70         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
  71         then
  72                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
  73                 do
  74                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
  75                         then
  76                                 return 0
  77                         fi
  78                 done
  79         fi
  80
  81         return 1
  82 }
  83
  84 matches_uuid ()
  85 {
  86         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
  87         then
  88                 return 0
  89         fi
  90
  91         path="${1}"
  92         uuid="$(cat /conf/uuid.conf)"
  93
  94         for try_uuid_file in "${path}/.disk/live-uuid"*
  95         do
  96                 [ -e "${try_uuid_file}" ] || continue
  97
  98                 try_uuid="$(cat "${try_uuid_file}")"
  99
 100                 if [ "${uuid}" = "${try_uuid}" ]
 101                 then
 102                         return 0
 103                 fi
 104         done
 105
 106         return 1
 107 }
 108
 109 get_backing_device ()
 110 {
 111         case "${1}" in
 112                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 113                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 114                         ;;
 115
 116                 *.dir)
 117                         echo "directory"
 118                         ;;
 119
 120                 *)
 121                         panic "Unrecognized live filesystem: ${1}"
 122                         ;;
 123         esac
 124 }
 125
 126 match_files_in_dir ()
 127 {
 128         # Does any files match pattern ${1} ?
 129         local pattern="${1}"
 130
 131         if [ "$(echo ${pattern})" != "${pattern}" ]
 132         then
 133                 return 0
 134         fi
 135
 136         return 1
 137 }
 138
 139 mount_images_in_directory ()
 140 {
 141         directory="${1}"
 142         rootmnt="${2}"
 143         mac="${3}"
 144
 145
 146         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 147                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 148                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 149                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 150                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 151                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 152         then
 153                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 154                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 155         else
 156                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 157         fi
 158 }
 159
 160 is_nice_device ()
 161 {
 162         sysfs_path="${1#/sys}"
 163
 164         if [ -e /lib/udev/path_id ]
 165         then
 166                 # squeeze
 167                 PATH_ID="/lib/udev/path_id"
 168         else
 169                 # wheezy/sid (udev >= 174)
 170                 PATH_ID="/sbin/udevadm test-builtin path_id"
 171         fi
 172
 173         if ${PATH_ID} "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-[^-]*-(ide|sas|scsi|usb|virtio)|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci)"
 174         then
 175                 return 0
 176         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 177         then
 178                 return 0
 179         elif echo ${sysfs_path} | grep -q "^/block/dm-"
 180         then
 181                 return 0
 182         elif echo ${sysfs_path} | grep -q "^/block/mtdblock"
 183         then
 184                 return 0
 185         fi
 186
 187         return 1
 188 }
 189
 190 check_dev ()
 191 {
 192         sysdev="${1}"
 193         devname="${2}"
 194         skip_uuid_check="${3}"
 195
 196         # support for fromiso=.../isofrom=....
 197         if [ -n "$FROMISO" ]
 198         then
 199                 ISO_DEVICE=$(dirname $FROMISO)
 200                 if ! [ -b $ISO_DEVICE ]
 201                 then
 202                         # to support unusual device names like /dev/cciss/c0d0p1
 203                         # as well we have to identify the block device name, let's
 204                         # do that for up to 15 levels
 205                         i=15
 206                         while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
 207                         do
 208                                 ISO_DEVICE=$(dirname ${ISO_DEVICE})
 209                                 [ -b "$ISO_DEVICE" ] && break
 210                                 i=$(($i -1))
 211                         done
 212                 fi
 213
 214                 if [ "$ISO_DEVICE" = "/" ]
 215                 then
 216                         echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
 217                 else
 218                         fs_type=$(get_fstype "${ISO_DEVICE}")
 219                         if is_supported_fs ${fs_type}
 220                         then
 221                                 mkdir /live/fromiso
 222                                 mount -t $fs_type "$ISO_DEVICE" /live/fromiso
 223                                 ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
 224                                 loopdevname=$(setup_loop "/live/fromiso/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
 225                                 devname="${loopdevname}"
 226                         else
 227                                 echo "Warning: unable to mount $ISO_DEVICE." >>/boot.log
 228                         fi
 229                 fi
 230         fi
 231
 232         if [ -z "${devname}" ]
 233         then
 234                 devname=$(sys2dev "${sysdev}")
 235         fi
 236
 237         if [ -d "${devname}" ]
 238         then
 239                 mount -o bind "${devname}" $mountpoint || continue
 240
 241                 if is_live_path $mountpoint
 242                 then
 243                         echo $mountpoint
 244                         return 0
 245                 else
 246                         umount $mountpoint
 247                 fi
 248         fi
 249
 250         IFS=","
 251         for device in ${devname}
 252         do
 253                 case "$device" in
 254                         *mapper*)
 255                                 # Adding lvm support
 256                                 if [ -x /scripts/local-top/lvm2 ]
 257                                 then
 258                                         ROOT="$device" resume="" /scripts/local-top/lvm2
 259                                 fi
 260                                 ;;
 261
 262                         /dev/md*)
 263                                 # Adding raid support
 264                                 if [ -x /scripts/local-top/mdadm ]
 265                                 then
 266                                         cp /conf/conf.d/md /conf/conf.d/md.orig
 267                                         echo "MD_DEVS=$device " >> /conf/conf.d/md
 268                                         /scripts/local-top/mdadm
 269                                         mv /conf/conf.d/md.orig /conf/conf.d/md
 270                                 fi
 271                                 ;;
 272                 esac
 273         done
 274         unset IFS
 275
 276         [ -n "$device" ] && devname="$device"
 277
 278         [ -e "$devname" ] || continue
 279
 280         if [ -n "${LIVE_MEDIA_OFFSET}" ]
 281         then
 282                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
 283                 devname="${loopdevname}"
 284         fi
 285
 286         fstype=$(get_fstype "${devname}")
 287
 288         if is_supported_fs ${fstype}
 289         then
 290                 devuid=$(blkid -o value -s UUID "$devname")
 291                 [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
 292                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
 293                 [ -n "$devuid" ] && echo "$devuid" >> $tried
 294
 295                 if [ -n "${FINDISO}" ]
 296                 then
 297                         if [ -f ${mountpoint}/${FINDISO} ]
 298                         then
 299                                 umount ${mountpoint}
 300                                 mkdir -p /live/findiso
 301                                 mount -t ${fstype} -o ro,noatime "${devname}" /live/findiso
 302                                 loopdevname=$(setup_loop "/live/findiso/${FINDISO}" "loop" "/sys/block/loop*" 0 "")
 303                                 devname="${loopdevname}"
 304                                 mount -t iso9660 -o ro,noatime "${devname}" ${mountpoint}
 305                         else
 306                                 umount ${mountpoint}
 307                         fi
 308                 fi
 309
 310                 if is_live_path ${mountpoint} && \
 311                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
 312                 then
 313                         echo ${mountpoint}
 314                         return 0
 315                 else
 316                         umount ${mountpoint} 2>/dev/null
 317                 fi
 318         fi
 319
 320         if [ -n "${LIVE_MEDIA_OFFSET}" ]
 321         then
 322                 losetup -d "${loopdevname}"
 323         fi
 324
 325         return 1
 326 }
 327
 328 find_livefs ()
 329 {
 330         timeout="${1}"
 331
 332         # don't start autodetection before timeout has expired
 333         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
 334         then
 335                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
 336                 then
 337                         return 1
 338                 fi
 339         fi
 340
 341         # first look at the one specified in the command line
 342         case "${LIVE_MEDIA}" in
 343                 removable-usb)
 344                         for sysblock in $(removable_usb_dev "sys")
 345                         do
 346                                 for dev in $(subdevices "${sysblock}")
 347                                 do
 348                                         if check_dev "${dev}"
 349                                         then
 350                                                 return 0
 351                                         fi
 352                                 done
 353                         done
 354                         return 1
 355                         ;;
 356
 357                 removable)
 358                         for sysblock in $(removable_dev "sys")
 359                         do
 360                                 for dev in $(subdevices "${sysblock}")
 361                                 do
 362                                         if check_dev "${dev}"
 363                                         then
 364                                                 return 0
 365                                         fi
 366                                 done
 367                         done
 368                         return 1
 369                         ;;
 370
 371                 *)
 372                         if [ ! -z "${LIVE_MEDIA}" ]
 373                         then
 374                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
 375                                 then
 376                                         return 0
 377                                 fi
 378                         fi
 379                         ;;
 380         esac
 381
 382         # or do the scan of block devices
 383         # prefer removable devices over non-removable devices, so scan them first
 384         devices_to_scan="$(removable_dev 'sys') $(non_removable_dev 'sys')"
 385
 386         for sysblock in $devices_to_scan
 387         do
 388                 devname=$(sys2dev "${sysblock}")
 389                 [ -e "$devname" ] || continue
 390                 fstype=$(get_fstype "${devname}")
 391
 392                 if /lib/udev/cdrom_id ${devname} > /dev/null
 393                 then
 394                         if check_dev "null" "${devname}"
 395                         then
 396                                 return 0
 397                         fi
 398                 elif is_nice_device "${sysblock}"
 399                 then
 400                         for dev in $(subdevices "${sysblock}")
 401                         do
 402                                 if check_dev "${dev}"
 403                                 then
 404                                         return 0
 405                                 fi
 406                         done
 407                 elif [ "${fstype}" = "squashfs" -o \
 408                         "${fstype}" = "btrfs" -o \
 409                         "${fstype}" = "ext2" -o \
 410                         "${fstype}" = "ext3" -o \
 411                         "${fstype}" = "ext4" -o \
 412                         "${fstype}" = "jffs2" ]
 413                 then
 414                         # This is an ugly hack situation, the block device has
 415                         # an image directly on it.  It's hopefully
 416                         # live-boot, so take it and run with it.
 417                         ln -s "${devname}" "${devname}.${fstype}"
 418                         echo "${devname}.${fstype}"
 419                         return 0
 420                 fi
 421         done
 422
 423         return 1
 424 }
 425
 426 integrity_check ()
 427 {
 428         media_mountpoint="${1}"
 429
 430         log_begin_msg "Checking media integrity"
 431
 432         cd ${media_mountpoint}
 433         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
 434         RC="${?}"
 435
 436         log_end_msg
 437
 438         if [ "${RC}" -eq 0 ]
 439         then
 440                 log_success_msg "Everything ok, will reboot in 10 seconds."
 441                 sleep 10
 442                 cd /
 443                 umount ${media_mountpoint}
 444                 sync
 445                 echo u > /proc/sysrq-trigger
 446                 echo b > /proc/sysrq-trigger
 447         else
 448                 panic "Not ok, a media defect is likely, switch to VT8 for details."
 449         fi
 450 }
 451
 452 mountroot ()
 453 {
 454         if [ -x /scripts/local-top/cryptroot ]; then
 455             /scripts/local-top/cryptroot
 456         fi
 457
 458         exec 6>&1
 459         exec 7>&2
 460         exec > boot.log
 461         exec 2>&1
 462         tail -f boot.log >&7 &
 463         tailpid="${!}"
 464
 465         # Ensure 'panic' function is overridden
 466         . /scripts/live-functions
 467
 468         Arguments
 469
 470         maybe_break live-premount
 471         log_begin_msg "Running /scripts/live-premount"
 472         run_scripts /scripts/live-premount
 473         log_end_msg
 474
 475         # Needed here too because some things (*cough* udev *cough*)
 476         # changes the timeout
 477
 478         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
 479         then
 480                 if do_netmount
 481                 then
 482                         livefs_root="${mountpoint}"
 483                 else
 484                         panic "Unable to find a live file system on the network"
 485                 fi
 486         else
 487                 if [ -n "${ISCSI_PORTAL}" ]
 488                 then
 489                         do_iscsi && livefs_root="${mountpoint}"
 490                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
 491                 then
 492                         # Do a local boot from hd
 493                         livefs_root=${ROOT}
 494                 else
 495                         if [ -x /usr/bin/memdiskfind ]
 496                         then
 497                                 MEMDISK=$(/usr/bin/memdiskfind)
 498
 499                                 if [ $? -eq 0 ]
 500                                 then
 501                                         # We found a memdisk, set up phram
 502                                         modprobe phram phram=memdisk,${MEMDISK}
 503
 504                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
 505                                         modprobe mtdblock
 506                                 fi
 507                         fi
 508
 509                         # Scan local devices for the image
 510                         i=0
 511                         while [ "$i" -lt 60 ]
 512                         do
 513                                 livefs_root=$(find_livefs ${i})
 514
 515                                 if [ -n "${livefs_root}" ]
 516                                 then
 517                                         break
 518                                 fi
 519
 520                                 sleep 1
 521                                 i="$(($i + 1))"
 522                         done
 523                 fi
 524         fi
 525
 526         if [ -z "${livefs_root}" ]
 527         then
 528                 panic "Unable to find a medium containing a live file system"
 529         fi
 530
 531         if [ "${INTEGRITY_CHECK}" ]
 532         then
 533                 integrity_check "${livefs_root}"
 534         fi
 535
 536         if [ "${TORAM}" ]
 537         then
 538                 live_dest="ram"
 539         elif [ "${TODISK}" ]
 540         then
 541                 live_dest="${TODISK}"
 542         fi
 543
 544         if [ "${live_dest}" ]
 545         then
 546                 log_begin_msg "Copying live media to ${live_dest}"
 547                 copy_live_to "${livefs_root}" "${live_dest}"
 548                 log_end_msg
 549         fi
 550
 551         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
 552         # because the mountpoint is left behind in /proc/mounts, so let's get
 553         # rid of it when running from RAM
 554         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
 555         then
 556                 losetup -d /dev/loop0
 557
 558                 if is_mountpoint /live/fromiso
 559                 then
 560                         umount /live/fromiso
 561                         rmdir --ignore-fail-on-non-empty /live/fromiso \
 562                                 >/dev/null 2>&1 || true
 563                 fi
 564         fi
 565
 566         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
 567         then
 568                 setup_unionfs "${livefs_root}" "${rootmnt}"
 569         else
 570                 mac="$(get_mac)"
 571                 mac="$(echo ${mac} | sed 's/-//g')"
 572                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
 573         fi
 574
 575
 576         if [ -n "${ROOT_PID}" ] ; then
 577                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
 578         fi
 579
 580         log_end_msg
 581
 582         # unionfs-fuse needs /dev to be bind-mounted for the duration of
 583         # live-bottom; udev's init script will take care of things after that
 584         if [ "${UNIONTYPE}" = unionfs-fuse ]
 585         then
 586                 mount -n -o bind /dev "${rootmnt}/dev"
 587         fi
 588
 589         # Move to the new root filesystem so that programs there can get at it.
 590         if [ ! -d /root/live/image ]
 591         then
 592                 mkdir -p /root/live/image
 593                 mount --move /live/image /root/live/image
 594         fi
 595
 596         # aufs2 in kernel versions around 2.6.33 has a regression:
 597         # directories can't be accessed when read for the first the time,
 598         # causing a failure for example when accessing /var/lib/fai
 599         # when booting FAI, this simple workaround solves it
 600         ls /root/* >/dev/null 2>&1
 601
 602         # Move findiso directory to the new root filesystem so that programs there can get at it.
 603         if [ -d /live/findiso ] && [ ! -d /root/live/findiso ]
 604         then
 605                 mkdir -p /root/live/findiso
 606                 mount -n --move /live/findiso /root/live/findiso
 607         fi
 608
 609         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
 610         # because the mountpoint is left behind in /proc/mounts, so let's get
 611         # rid of it when running from RAM
 612         if [ -n "$FINDISO" ] && [ "${TORAM}" ]
 613         then
 614                 losetup -d /dev/loop0
 615
 616                 if is_mountpoint /root/live/findiso
 617                 then
 618                         umount /root/live/findiso
 619                         rmdir --ignore-fail-on-non-empty /root/live/findiso \
 620                                 >/dev/null 2>&1 || true
 621                 fi
 622         fi
 623
 624         # copy snapshot configuration if exists
 625         if [ -f snapshot.conf ]
 626         then
 627                 log_begin_msg "Copying snapshot.conf to ${rootmnt}/etc/live/boot.d"
 628                 if [ ! -d "${rootmnt}/etc/live/boot.d" ]
 629                 then
 630                         mkdir -p "${rootmnt}/etc/live/boot.d"
 631                 fi
 632                 cp snapshot.conf "${rootmnt}/etc/live/boot.d/"
 633                 log_end_msg
 634         fi
 635
 636         if [ -f /etc/resolv.conf ] && [ ! -s ${rootmnt}/etc/resolv.conf ]
 637         then
 638                 log_begin_msg "Copying /etc/resolv.conf to ${rootmnt}/etc/resolv.conf"
 639                 cp -v /etc/resolv.conf ${rootmnt}/etc/resolv.conf
 640                 log_end_msg
 641         fi
 642
 643         maybe_break live-bottom
 644         log_begin_msg "Running /scripts/live-bottom\n"
 645
 646         run_scripts /scripts/live-bottom
 647         log_end_msg
 648
 649         if [ "${UNIONFS}" = unionfs-fuse ]
 650         then
 651                 umount "${rootmnt}/dev"
 652         fi
 653
 654         exec 1>&6 6>&-
 655         exec 2>&7 7>&-
 656         kill ${tailpid}
 657         [ -w "${rootmnt}/var/log/" ] && mkdir -p /var/log/live && cp boot.log "${rootmnt}/var/log/live" 2>/dev/null
 658 }