scripts/boot.sh

   1 #!/bin/sh
   2
   3 # set -e
   4
   5 if [ -e /scripts/functions ]
   6 then
   7         # initramfs-tools specific (FIXME)
   8         . /scripts/functions
   9 fi
  10
  11 for _SCRIPT in /lib/live/boot/*
  12 do
  13         if [ -e "${_SCRIPT}" ]
  14         then
  15                 . ${_SCRIPT}
  16         fi
  17 done
  18
  19 export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
  20
  21 echo "/root/lib" >> /etc/ld.so.conf
  22 echo "/root/usr/lib" >> /etc/ld.so.conf
  23
  24 mountpoint="/live/image"
  25 alt_mountpoint="/media"
  26 LIVE_MEDIA_PATH="live"
  27
  28 HOSTNAME="host"
  29
  30 mkdir -p "${mountpoint}"
  31 tried="/tmp/tried"
  32
  33 # Create /etc/mtab for debug purpose and future syncs
  34 if [ ! -d /etc ]
  35 then
  36         mkdir /etc/
  37 fi
  38
  39 if [ ! -f /etc/mtab ]
  40 then
  41         touch /etc/mtab
  42 fi
  43
  44 if [ ! -x "/bin/fstype" ]
  45 then
  46         # klibc not in path -> not in initramfs
  47         export PATH="${PATH}:/usr/lib/klibc/bin"
  48 fi
  49
  50 # handle upgrade path from old udev (using udevinfo) to
  51 # recent versions of udev (using udevadm info)
  52 if [ -x /sbin/udevadm ]
  53 then
  54         udevinfo='/sbin/udevadm info'
  55 else
  56         udevinfo='udevinfo'
  57 fi
  58
  59 old_root_overlay_label="live-rw"
  60 old_home_overlay_label="home-rw"
  61 custom_overlay_label="custom-ov"
  62 root_snapshot_label="live-sn"
  63 old_root_snapshot_label="live-sn"
  64 home_snapshot_label="home-sn"
  65 persistence_list="live-persistence.conf"
  66
  67 if [ ! -f /live.vars ]
  68 then
  69         touch /live.vars
  70 fi
  71
  72 is_live_path ()
  73 {
  74         DIRECTORY="${1}"
  75
  76         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
  77         then
  78                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
  79                 do
  80                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
  81                         then
  82                                 return 0
  83                         fi
  84                 done
  85         fi
  86
  87         return 1
  88 }
  89
  90 matches_uuid ()
  91 {
  92         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
  93         then
  94                 return 0
  95         fi
  96
  97         path="${1}"
  98         uuid="$(cat /conf/uuid.conf)"
  99
 100         for try_uuid_file in "${path}/.disk/live-uuid"*
 101         do
 102                 [ -e "${try_uuid_file}" ] || continue
 103
 104                 try_uuid="$(cat "${try_uuid_file}")"
 105
 106                 if [ "${uuid}" = "${try_uuid}" ]
 107                 then
 108                         return 0
 109                 fi
 110         done
 111
 112         return 1
 113 }
 114
 115 get_backing_device ()
 116 {
 117         case "${1}" in
 118                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 119                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 120                         ;;
 121
 122                 *.dir)
 123                         echo "directory"
 124                         ;;
 125
 126                 *)
 127                         panic "Unrecognized live filesystem: ${1}"
 128                         ;;
 129         esac
 130 }
 131
 132 match_files_in_dir ()
 133 {
 134         # Does any files match pattern ${1} ?
 135         local pattern="${1}"
 136
 137         if [ "$(echo ${pattern})" != "${pattern}" ]
 138         then
 139                 return 0
 140         fi
 141
 142         return 1
 143 }
 144
 145 mount_images_in_directory ()
 146 {
 147         directory="${1}"
 148         rootmnt="${2}"
 149         mac="${3}"
 150
 151
 152         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 153                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 154                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 155                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 156                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 157                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 158         then
 159                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 160                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 161         else
 162                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 163         fi
 164 }
 165
 166 is_nice_device ()
 167 {
 168         sysfs_path="${1#/sys}"
 169
 170         if [ -e /lib/udev/path_id ]
 171         then
 172                 # squeeze
 173                 PATH_ID="/lib/udev/path_id"
 174         else
 175                 # wheezy/sid (udev >= 174)
 176                 PATH_ID="/sbin/udevadm test-builtin path_id"
 177         fi
 178
 179         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)"
 180         then
 181                 return 0
 182         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 183         then
 184                 return 0
 185         elif echo ${sysfs_path} | grep -q "^/block/dm-"
 186         then
 187                 return 0
 188         elif echo ${sysfs_path} | grep -q "^/block/mtdblock"
 189         then
 190                 return 0
 191         fi
 192
 193         return 1
 194 }
 195
 196 check_dev ()
 197 {
 198         sysdev="${1}"
 199         devname="${2}"
 200         skip_uuid_check="${3}"
 201
 202         # support for fromiso=.../isofrom=....
 203         if [ -n "$FROMISO" ]
 204         then
 205                 ISO_DEVICE=$(dirname $FROMISO)
 206                 if ! [ -b $ISO_DEVICE ]
 207                 then
 208                         # to support unusual device names like /dev/cciss/c0d0p1
 209                         # as well we have to identify the block device name, let's
 210                         # do that for up to 15 levels
 211                         i=15
 212                         while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
 213                         do
 214                                 ISO_DEVICE=$(dirname ${ISO_DEVICE})
 215                                 [ -b "$ISO_DEVICE" ] && break
 216                                 i=$(($i -1))
 217                         done
 218                 fi
 219
 220                 if [ "$ISO_DEVICE" = "/" ]
 221                 then
 222                         echo "Warning: device for bootoption fromiso= ($FROMISO) not found.">>/boot.log
 223                 else
 224                         fs_type=$(get_fstype "${ISO_DEVICE}")
 225                         if is_supported_fs ${fs_type}
 226                         then
 227                                 mkdir /live/fromiso
 228                                 mount -t $fs_type "$ISO_DEVICE" /live/fromiso
 229                                 ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
 230                                 loopdevname=$(setup_loop "/live/fromiso/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
 231                                 devname="${loopdevname}"
 232                         else
 233                                 echo "Warning: unable to mount $ISO_DEVICE." >>/boot.log
 234                         fi
 235                 fi
 236         fi
 237
 238         if [ -z "${devname}" ]
 239         then
 240                 devname=$(sys2dev "${sysdev}")
 241         fi
 242
 243         if [ -d "${devname}" ]
 244         then
 245                 mount -o bind "${devname}" $mountpoint || continue
 246
 247                 if is_live_path $mountpoint
 248                 then
 249                         echo $mountpoint
 250                         return 0
 251                 else
 252                         umount $mountpoint
 253                 fi
 254         fi
 255
 256         IFS=","
 257         for device in ${devname}
 258         do
 259                 case "$device" in
 260                         *mapper*)
 261                                 # Adding lvm support
 262                                 if [ -x /scripts/local-top/lvm2 ]
 263                                 then
 264                                         ROOT="$device" resume="" /scripts/local-top/lvm2
 265                                 fi
 266                                 ;;
 267
 268                         /dev/md*)
 269                                 # Adding raid support
 270                                 if [ -x /scripts/local-top/mdadm ]
 271                                 then
 272                                         cp /conf/conf.d/md /conf/conf.d/md.orig
 273                                         echo "MD_DEVS=$device " >> /conf/conf.d/md
 274                                         /scripts/local-top/mdadm
 275                                         mv /conf/conf.d/md.orig /conf/conf.d/md
 276                                 fi
 277                                 ;;
 278                 esac
 279         done
 280         unset IFS
 281
 282         [ -n "$device" ] && devname="$device"
 283
 284         [ -e "$devname" ] || continue
 285
 286         if [ -n "${LIVE_MEDIA_OFFSET}" ]
 287         then
 288                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
 289                 devname="${loopdevname}"
 290         fi
 291
 292         fstype=$(get_fstype "${devname}")
 293
 294         if is_supported_fs ${fstype}
 295         then
 296                 devuid=$(blkid -o value -s UUID "$devname")
 297                 [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
 298                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
 299                 [ -n "$devuid" ] && echo "$devuid" >> $tried
 300
 301                 if [ -n "${FINDISO}" ]
 302                 then
 303                         if [ -f ${mountpoint}/${FINDISO} ]
 304                         then
 305                                 umount ${mountpoint}
 306                                 mkdir -p /live/findiso
 307                                 mount -t ${fstype} -o ro,noatime "${devname}" /live/findiso
 308                                 loopdevname=$(setup_loop "/live/findiso/${FINDISO}" "loop" "/sys/block/loop*" 0 "")
 309                                 devname="${loopdevname}"
 310                                 mount -t iso9660 -o ro,noatime "${devname}" ${mountpoint}
 311                         else
 312                                 umount ${mountpoint}
 313                         fi
 314                 fi
 315
 316                 if is_live_path ${mountpoint} && \
 317                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
 318                 then
 319                         echo ${mountpoint}
 320                         return 0
 321                 else
 322                         umount ${mountpoint} 2>/dev/null
 323                 fi
 324         fi
 325
 326         if [ -n "${LIVE_MEDIA_OFFSET}" ]
 327         then
 328                 losetup -d "${loopdevname}"
 329         fi
 330
 331         return 1
 332 }
 333
 334 find_livefs ()
 335 {
 336         timeout="${1}"
 337
 338         # don't start autodetection before timeout has expired
 339         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
 340         then
 341                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
 342                 then
 343                         return 1
 344                 fi
 345         fi
 346
 347         # first look at the one specified in the command line
 348         case "${LIVE_MEDIA}" in
 349                 removable-usb)
 350                         for sysblock in $(removable_usb_dev "sys")
 351                         do
 352                                 for dev in $(subdevices "${sysblock}")
 353                                 do
 354                                         if check_dev "${dev}"
 355                                         then
 356                                                 return 0
 357                                         fi
 358                                 done
 359                         done
 360                         return 1
 361                         ;;
 362
 363                 removable)
 364                         for sysblock in $(removable_dev "sys")
 365                         do
 366                                 for dev in $(subdevices "${sysblock}")
 367                                 do
 368                                         if check_dev "${dev}"
 369                                         then
 370                                                 return 0
 371                                         fi
 372                                 done
 373                         done
 374                         return 1
 375                         ;;
 376
 377                 *)
 378                         if [ ! -z "${LIVE_MEDIA}" ]
 379                         then
 380                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
 381                                 then
 382                                         return 0
 383                                 fi
 384                         fi
 385                         ;;
 386         esac
 387
 388         # or do the scan of block devices
 389         # prefer removable devices over non-removable devices, so scan them first
 390         devices_to_scan="$(removable_dev 'sys') $(non_removable_dev 'sys')"
 391
 392         for sysblock in $devices_to_scan
 393         do
 394                 devname=$(sys2dev "${sysblock}")
 395                 [ -e "$devname" ] || continue
 396                 fstype=$(get_fstype "${devname}")
 397
 398                 if /lib/udev/cdrom_id ${devname} > /dev/null
 399                 then
 400                         if check_dev "null" "${devname}"
 401                         then
 402                                 return 0
 403                         fi
 404                 elif is_nice_device "${sysblock}"
 405                 then
 406                         for dev in $(subdevices "${sysblock}")
 407                         do
 408                                 if check_dev "${dev}"
 409                                 then
 410                                         return 0
 411                                 fi
 412                         done
 413                 elif [ "${fstype}" = "squashfs" -o \
 414                         "${fstype}" = "btrfs" -o \
 415                         "${fstype}" = "ext2" -o \
 416                         "${fstype}" = "ext3" -o \
 417                         "${fstype}" = "ext4" -o \
 418                         "${fstype}" = "jffs2" ]
 419                 then
 420                         # This is an ugly hack situation, the block device has
 421                         # an image directly on it.  It's hopefully
 422                         # live-boot, so take it and run with it.
 423                         ln -s "${devname}" "${devname}.${fstype}"
 424                         echo "${devname}.${fstype}"
 425                         return 0
 426                 fi
 427         done
 428
 429         return 1
 430 }
 431
 432 integrity_check ()
 433 {
 434         media_mountpoint="${1}"
 435
 436         log_begin_msg "Checking media integrity"
 437
 438         cd ${media_mountpoint}
 439         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
 440         RC="${?}"
 441
 442         log_end_msg
 443
 444         if [ "${RC}" -eq 0 ]
 445         then
 446                 log_success_msg "Everything ok, will reboot in 10 seconds."
 447                 sleep 10
 448                 cd /
 449                 umount ${media_mountpoint}
 450                 sync
 451                 echo u > /proc/sysrq-trigger
 452                 echo b > /proc/sysrq-trigger
 453         else
 454                 panic "Not ok, a media defect is likely, switch to VT8 for details."
 455         fi
 456 }
 457
 458 mountroot ()
 459 {
 460         if [ -x /scripts/local-top/cryptroot ]; then
 461             /scripts/local-top/cryptroot
 462         fi
 463
 464         exec 6>&1
 465         exec 7>&2
 466         exec > boot.log
 467         exec 2>&1
 468         tail -f boot.log >&7 &
 469         tailpid="${!}"
 470
 471         . /live.vars
 472
 473         Arguments
 474
 475         # make sure all harddisk devices are read-only
 476         # this is important for forensic investigations
 477         case "${READ_ONLY}" in
 478                 true)
 479                         Read_only
 480                         ;;
 481         esac
 482
 483         maybe_break live-premount
 484         log_begin_msg "Running /scripts/live-premount"
 485         run_scripts /scripts/live-premount
 486         log_end_msg
 487
 488         # Needed here too because some things (*cough* udev *cough*)
 489         # changes the timeout
 490
 491         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
 492         then
 493                 if do_netmount
 494                 then
 495                         livefs_root="${mountpoint}"
 496                 else
 497                         panic "Unable to find a live file system on the network"
 498                 fi
 499         else
 500                 if [ -n "${ISCSI_PORTAL}" ]
 501                 then
 502                         do_iscsi && livefs_root="${mountpoint}"
 503                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
 504                 then
 505                         # Do a local boot from hd
 506                         livefs_root=${ROOT}
 507                 else
 508                         if [ -x /usr/bin/memdiskfind ]
 509                         then
 510                                 MEMDISK=$(/usr/bin/memdiskfind)
 511
 512                                 if [ $? -eq 0 ]
 513                                 then
 514                                         # We found a memdisk, set up phram
 515                                         modprobe phram phram=memdisk,${MEMDISK}
 516
 517                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
 518                                         modprobe mtdblock
 519                                 fi
 520                         fi
 521
 522                         # Scan local devices for the image
 523                         i=0
 524                         while [ "$i" -lt 60 ]
 525                         do
 526                                 livefs_root=$(find_livefs ${i})
 527
 528                                 if [ -n "${livefs_root}" ]
 529                                 then
 530                                         break
 531                                 fi
 532
 533                                 sleep 1
 534                                 i="$(($i + 1))"
 535                         done
 536                 fi
 537         fi
 538
 539         if [ -z "${livefs_root}" ]
 540         then
 541                 panic "Unable to find a medium containing a live file system"
 542         fi
 543
 544         if [ "${INTEGRITY_CHECK}" ]
 545         then
 546                 integrity_check "${livefs_root}"
 547         fi
 548
 549         if [ "${TORAM}" ]
 550         then
 551                 live_dest="ram"
 552         elif [ "${TODISK}" ]
 553         then
 554                 live_dest="${TODISK}"
 555         fi
 556
 557         if [ "${live_dest}" ]
 558         then
 559                 log_begin_msg "Copying live media to ${live_dest}"
 560                 copy_live_to "${livefs_root}" "${live_dest}"
 561                 log_end_msg
 562         fi
 563
 564         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
 565         # because the mountpoint is left behind in /proc/mounts, so let's get
 566         # rid of it when running from RAM
 567         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
 568         then
 569                 losetup -d /dev/loop0
 570
 571                 if is_mountpoint /live/fromiso
 572                 then
 573                         umount /live/fromiso
 574                         rmdir --ignore-fail-on-non-empty /live/fromiso \
 575                                 >/dev/null 2>&1 || true
 576                 fi
 577         fi
 578
 579         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
 580         then
 581                 setup_unionfs "${livefs_root}" "${rootmnt}"
 582         else
 583                 mac="$(get_mac)"
 584                 mac="$(echo ${mac} | sed 's/-//g')"
 585                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
 586         fi
 587
 588
 589         if [ -n "${ROOT_PID}" ] ; then
 590                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
 591         fi
 592
 593         log_end_msg
 594
 595         # unionfs-fuse needs /dev to be bind-mounted for the duration of
 596         # live-bottom; udev's init script will take care of things after that
 597         if [ "${UNIONTYPE}" = unionfs-fuse ]
 598         then
 599                 mount -n -o bind /dev "${rootmnt}/dev"
 600         fi
 601
 602         # Move to the new root filesystem so that programs there can get at it.
 603         if [ ! -d /root/live/image ]
 604         then
 605                 mkdir -p /root/live/image
 606                 mount --move /live/image /root/live/image
 607         fi
 608
 609         # aufs2 in kernel versions around 2.6.33 has a regression:
 610         # directories can't be accessed when read for the first the time,
 611         # causing a failure for example when accessing /var/lib/fai
 612         # when booting FAI, this simple workaround solves it
 613         ls /root/* >/dev/null 2>&1
 614
 615         # Move findiso directory to the new root filesystem so that programs there can get at it.
 616         if [ -d /live/findiso ] && [ ! -d /root/live/findiso ]
 617         then
 618                 mkdir -p /root/live/findiso
 619                 mount -n --move /live/findiso /root/live/findiso
 620         fi
 621
 622         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
 623         # because the mountpoint is left behind in /proc/mounts, so let's get
 624         # rid of it when running from RAM
 625         if [ -n "$FINDISO" ] && [ "${TORAM}" ]
 626         then
 627                 losetup -d /dev/loop0
 628
 629                 if is_mountpoint /root/live/findiso
 630                 then
 631                         umount /root/live/findiso
 632                         rmdir --ignore-fail-on-non-empty /root/live/findiso \
 633                                 >/dev/null 2>&1 || true
 634                 fi
 635         fi
 636
 637         # copy snapshot configuration if exists
 638         if [ -f snapshot.conf ]
 639         then
 640                 log_begin_msg "Copying snapshot.conf to ${rootmnt}/etc/live/boot.d"
 641                 if [ ! -d "${rootmnt}/etc/live/boot.d" ]
 642                 then
 643                         mkdir -p "${rootmnt}/etc/live/boot.d"
 644                 fi
 645                 cp snapshot.conf "${rootmnt}/etc/live/boot.d/"
 646                 log_end_msg
 647         fi
 648
 649         if [ -f /etc/resolv.conf ] && [ ! -s ${rootmnt}/etc/resolv.conf ]
 650         then
 651                 log_begin_msg "Copying /etc/resolv.conf to ${rootmnt}/etc/resolv.conf"
 652                 cp -v /etc/resolv.conf ${rootmnt}/etc/resolv.conf
 653                 log_end_msg
 654         fi
 655
 656         maybe_break live-bottom
 657         log_begin_msg "Running /scripts/live-bottom\n"
 658
 659         run_scripts /scripts/live-bottom
 660         log_end_msg
 661
 662         if [ "${UNIONFS}" = unionfs-fuse ]
 663         then
 664                 umount "${rootmnt}/dev"
 665         fi
 666
 667         exec 1>&6 6>&-
 668         exec 2>&7 7>&-
 669         kill ${tailpid}
 670         [ -w "${rootmnt}/var/log/" ] && mkdir -p /var/log/live && cp boot.log "${rootmnt}/var/log/live" 2>/dev/null
 671 }