scripts/live

   1 #!/bin/sh
   2
   3 # set -e
   4
   5 export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
   6
   7 echo "/root/lib" >> /etc/ld.so.conf
   8 echo "/root/usr/lib" >> /etc/ld.so.conf
   9
  10 mountpoint="/live/image"
  11 LIVE_MEDIA_PATH="live"
  12
  13 root_persistence="live-rw"
  14 home_persistence="home-rw"
  15 root_snapshot_label="live-sn"
  16 home_snapshot_label="home-sn"
  17
  18 USERNAME="user"
  19 USERFULLNAME="Live user"
  20 HOSTNAME="host"
  21
  22 mkdir -p "${mountpoint}"
  23
  24 # Create /etc/mtab for debug purpose and future syncs
  25 if [ ! -d /etc ]
  26 then
  27         mkdir /etc/
  28 fi
  29
  30 if [ ! -f /etc/mtab ]
  31 then
  32         touch /etc/mtab
  33 fi
  34
  35 [ -f /etc/live.conf ] && . /etc/live.conf
  36 export USERNAME USERFULLNAME HOSTNAME
  37
  38 . /scripts/live-helpers
  39
  40 if [ ! -f /live.vars ]
  41 then
  42         touch /live.vars
  43 fi
  44
  45 Arguments ()
  46 {
  47         PRESEEDS=""
  48
  49         for ARGUMENT in $(cat /proc/cmdline)
  50         do
  51                 case "${ARGUMENT}" in
  52                         access=*)
  53                                 ACCESS="${ARGUMENT#access=}"
  54                                 export ACCESS
  55                                 ;;
  56
  57                         console=*)
  58                                 DEFCONSOLE="${ARGUMENT#*=}"
  59                                 export DEFCONSOLE
  60                                 ;;
  61
  62                         debug)
  63                                 DEBUG="Yes"
  64                                 export DEBUG
  65
  66                                 set -x
  67                                 ;;
  68
  69                         fetch=*)
  70                                 FETCH="${ARGUMENT#fetch=}"
  71                                 export FETCH
  72                                 ;;
  73
  74                         forcepersistentfsck)
  75                                 FORCEPERSISTENTFSCK="Yes"
  76                                 export FORCEPERSISTENTFSCK
  77                                 ;;
  78
  79                         hook=*)
  80                                 HOOK="${ARGUMENT#hook=}"
  81                                 export HOOK
  82                                 ;;
  83
  84                         ftpfs=*)
  85                                 FTPFS="${ARGUMENT#ftpfs=}"
  86                                 export FTPFS
  87                                 ;;
  88
  89                         httpfs=*)
  90                                 HTTPFS="${ARGUMENT#httpfs=}"
  91                                 export HTTPFS
  92                                 ;;
  93
  94                         hostname=*)
  95                                 HOSTNAME="${ARGUMENT#hostname=}"
  96                                 LIVECONF="changed"
  97                                 export HOSTNAME LIVECONF
  98                                 ;;
  99
 100                         username=*)
 101                                 USERNAME="${ARGUMENT#username=}"
 102                                 LIVECONF="changed"
 103                                 export USERNAME LIVECONF
 104                                 ;;
 105
 106                         userfullname=*)
 107                                 USERFULLNAME="${ARGUMENT#userfullname=}"
 108                                 LIVECONF="changed"
 109                                 export USERFULLNAME LIVECONF
 110                                 ;;
 111
 112                         ignore_uuid)
 113                                 IGNORE_UUID="Yes"
 114                                 export IGNORE_UUID
 115                                 ;;
 116
 117                         integrity-check)
 118                                 INTEGRITY_CHECK="Yes"
 119                                 export INTEGRITY_CHECK
 120                                 ;;
 121
 122                         ip=*)
 123                                 STATICIP="${ARGUMENT#ip=}"
 124
 125                                 if [ -z "${STATICIP}" ]
 126                                 then
 127                                         STATICIP="frommedia"
 128                                 fi
 129
 130                                 export STATICIP
 131                                 ;;
 132
 133                         keyb=*|kbd-chooser/method=*)
 134                                 KBD="${ARGUMENT#*=}"
 135                                 export KBD
 136                                 ;;
 137
 138                         klayout=*|console-setup/layoutcode=*)
 139                                 KLAYOUT="${ARGUMENT#*=}"
 140                                 export KLAYOUT
 141                                 ;;
 142
 143                         kvariant=*|console-setup/variantcode=*)
 144                                 KVARIANT="${ARGUMENT#*=}"
 145                                 export KVARIANT
 146                                 ;;
 147
 148                         kmodel=*|console-setup/modelcode=*)
 149                                 KMODEL="${ARGUMENT#*=}"
 150                                 export KMODEL
 151                                 ;;
 152
 153                         koptions=*)
 154                                 KOPTIONS="${ARGUMENT#koptions=}"
 155                                 export KOPTIONS
 156                                 ;;
 157
 158                         live-getty)
 159                                 LIVE_GETTY="1"
 160                                 export LIVE_GETTY
 161                                 ;;
 162
 163                         live-media=*|bootfrom=*)
 164                                 LIVE_MEDIA="${ARGUMENT#*=}"
 165                                 export LIVE_MEDIA
 166                                 ;;
 167
 168                         live-media-encryption=*|encryption=*)
 169                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 170                                 export LIVE_MEDIA_ENCRYPTION
 171                                 ;;
 172
 173                         live-media-offset=*)
 174                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 175                                 export LIVE_MEDIA_OFFSET
 176                                 ;;
 177
 178                         live-media-path=*)
 179                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 180                                 export LIVE_MEDIA_PATH
 181                                 ;;
 182
 183                         live-media-timeout=*)
 184                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 185                                 export LIVE_MEDIA_TIMEOUT
 186                                 ;;
 187
 188                         language=*|debian-installer/language=*)
 189                                 language=${x#debian-installer/language=}
 190                                 locale="$(lang2locale "$language")"
 191                                 set_locale="true"
 192                                 ;;
 193
 194                         locale=*|debian-installer/locale=*)
 195                                 LOCALE="${ARGUMENT#*=}"
 196                                 export LOCALE
 197                                 ;;
 198
 199                         module=*)
 200                                 MODULE="${ARGUMENT#module=}"
 201                                 export MODULE
 202                                 ;;
 203
 204                         netboot=*)
 205                                 NETBOOT="${ARGUMENT#netboot=}"
 206                                 export NETBOOT
 207                                 ;;
 208
 209                         nfsopts=*)
 210                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 211                                 export NFSOPTS
 212                                 ;;
 213
 214                         nfscow=*)
 215                                 NFS_COW="${ARGUMENT#nfscow=}"
 216                                 export NFS_COW
 217                                 ;;
 218
 219                         noaccessibility)
 220                                 NOACCESSIBILITY="Yes"
 221                                 export NOACCESSIBILITY
 222                                 ;;
 223
 224                         noapparmor)
 225                                 NOAPPARMOR="Yes"
 226                                 export NOAPPARMOR
 227                                 ;;
 228
 229                         noaptcdrom)
 230                                 NOAPTCDROM="Yes"
 231                                 export NOAPTCDROM
 232                                 ;;
 233
 234                         noautologin)
 235                                 NOAUTOLOGIN="Yes"
 236                                 export NOAUTOLOGIN
 237                                 ;;
 238
 239                         noxautologin)
 240                                 NOXAUTOLOGIN="Yes"
 241                                 export NOXAUTOLOGIN
 242                                 ;;
 243
 244                         noconsolekeyboard)
 245                                 NOCONSOLEKEYBOARD="Yes"
 246                                 export NOCONSOLEKEYBOARD
 247                                 ;;
 248
 249                         nofastboot)
 250                                 NOFASTBOOT="Yes"
 251                                 export NOFASTBOOT
 252                                 ;;
 253
 254                         nofstab)
 255                                 NOFSTAB="Yes"
 256                                 export NOFSTAB
 257                                 ;;
 258
 259                         nognomepanel)
 260                                 NOGNOMEPANEL="Yes"
 261                                 export NOGNOMEPANEL
 262                                 ;;
 263
 264                         nohosts)
 265                                 NOHOSTS="Yes"
 266                                 export NOHOSTS
 267                                 ;;
 268
 269                         nokpersonalizer)
 270                                 NOKPERSONALIZER="Yes"
 271                                 export NOKPERSONALIZER
 272                                 ;;
 273
 274                         nolanguageselector)
 275                                 NOLANGUAGESELECTOR="Yes"
 276                                 export NOLANGUAGESELECTOR
 277                                 ;;
 278
 279                         nolocales)
 280                                 NOLOCALES="Yes"
 281                                 export NOLOCALES
 282                                 ;;
 283
 284                         nonetworking)
 285                                 NONETWORKING="Yes"
 286                                 export NONETWORKING
 287                                 ;;
 288
 289                         nopowermanagement)
 290                                 NOPOWERMANAGEMENT="Yes"
 291                                 export NOPOWERMANAGEMENT
 292                                 ;;
 293
 294                         noprogramcrashes)
 295                                 NOPROGRAMCRASHES="Yes"
 296                                 export NOPROGRAMCRASHES
 297                                 ;;
 298
 299                         nojockey)
 300                                 NOJOCKEY="Yes"
 301                                 export NOJOCKEY
 302                                 ;;
 303
 304                         nosudo)
 305                                 NOSUDO="Yes"
 306                                 export NOSUDO
 307                                 ;;
 308
 309                         swapon)
 310                                 SWAPON="Yes"
 311                                 export SWAPON
 312                                 ;;
 313
 314                         noupdatenotifier)
 315                                 NOUPDATENOTIFIER="Yes"
 316                                 export NOUPDATENOTIFIER
 317                                 ;;
 318
 319                         nouser)
 320                                 NOUSER="Yes"
 321                                 export NOUSER
 322                                 ;;
 323
 324                         noxautoconfig)
 325                                 NOXAUTOCONFIG="Yes"
 326                                 export NOXAUTOCONFIG
 327                                 ;;
 328
 329                         noxscreensaver)
 330                                 NOXSCREENSAVER="Yes"
 331                                 export NOXSCREENSAVER
 332                                 ;;
 333
 334                         persistent)
 335                                 PERSISTENT="Yes"
 336                                 export PERSISTENT
 337                                 ;;
 338
 339                         persistent=*)
 340                                 PERSISTENT="${ARGUMENT#persistent=}"
 341                                 if [ -z "${PERSISTENT}" ]
 342                                 then
 343                                         PERSISTENT="Yes"
 344                                 fi
 345                                 export PERSISTENT
 346                                 ;;
 347
 348                         persistent-path=*)
 349                                 PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
 350                                 export PERSISTENT_PATH
 351                                 ;;
 352
 353                         persistent-subtext=*)
 354                                 root_persistence="${root_persistence}-${ARGUMENT#persistent-subtext=}"
 355                                 home_persistence="${home_persistence}-${ARGUMENT#persistent-subtext=}"
 356                                 root_snapshot_label="${root_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 357                                 home_snapshot_label="${home_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 358                                 ;;
 359
 360                         nopersistent)
 361                                 NOPERSISTENT="Yes"
 362                                 export NOPERSISTENT
 363                                 ;;
 364
 365                         preseed/file=*|file=*)
 366                                 LOCATION="${ARGUMENT#*=}"
 367                                 export LOCATION
 368                                 ;;
 369
 370                         nopreseed)
 371                                 NOPRESEED="Yes"
 372                                 export NOPRESEED
 373                                 ;;
 374
 375                         url=*)
 376                                 location="${ARGUMENT#url=}"
 377
 378                                 mount -o bind /sys /root/sys
 379                                 mount -o bind /proc /root/proc
 380                                 mount -o bind /dev /root/dev
 381
 382                                 mkdir -p /root/var/run/network
 383                                 chroot /root dhclient eth0
 384                                 chroot /root wget -P /tmp "${location}"
 385                                 chroot /root ifconfig eth0 down
 386
 387                                 umount /root/sys
 388                                 umount /root/proc
 389                                 umount /root/dev
 390
 391                                 LOCATION="/tmp/$(basename "${location}")"
 392                                 ;;
 393
 394                         */*=*)
 395                                 question="${ARGUMENT%%=*}"
 396                                 value="${ARGUMENT#*=}"
 397                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 398                                 export PRESEEDS
 399                                 ;;
 400
 401                         showmounts)
 402                                 SHOWMOUNTS="Yes"
 403                                 export SHOWMOUNTS
 404                                 ;;
 405
 406                         silent)
 407                                 SILENT="Yes"
 408                                 export SILENT
 409                                 ;;
 410
 411                         textonly)
 412                                 TEXTONLY="Yes"
 413                                 export TEXTONLY
 414                                 ;;
 415
 416                         timezone=*)
 417                                 TIMEZONE="${ARGUMENT#timezone=}"
 418                                 export TIMEZONE
 419                                 ;;
 420
 421                         notimezone)
 422                                 NOTIMEZONE="Yes"
 423                                 export NOTIMEZONE
 424                                 ;;
 425
 426                         todisk=*)
 427                                 TODISK="${ARGUMENT#todisk=}"
 428                                 export TODISK
 429                                 ;;
 430
 431                         toram)
 432                                 TORAM="Yes"
 433                                 export TORAM
 434                                 ;;
 435
 436                         toram=*)
 437                                 TORAM="Yes"
 438                                 MODULETORAM="${ARGUMENT#toram=}"
 439                                 export TORAM MODULETORAM
 440                                 ;;
 441
 442                         exposedroot)
 443                                 EXPOSED_ROOT="Yes"
 444                                 export EXPOSED_ROOT
 445                                 ;;
 446
 447                         plainroot)
 448                                 PLAIN_ROOT="Yes"
 449                                 export PLAIN_ROOT
 450                                 ;;
 451
 452                         skipunion)
 453                                 SKIP_UNION_MOUNTS="Yes"
 454                                 export SKIP_UNION_MOUNTS
 455                                 ;;
 456
 457                         root=*)
 458                                 ROOT="${ARGUMENT#root=}"
 459                                 export ROOT
 460                                 ;;
 461
 462                         union=*)
 463                                 UNIONTYPE="${ARGUMENT#union=}"
 464                                 export UNIONTYPE
 465                                 ;;
 466
 467                         utc=*)
 468                                 UTC="${ARGUMENT#utc=}"
 469                                 export UTC
 470                                 ;;
 471
 472                         xdebconf)
 473                                 XDEBCONF="Yes"
 474                                 export XDEBCONF
 475                                 ;;
 476
 477                         xdriver=*)
 478                                 XDRIVER="${ARGUMENT#xdriver=}"
 479                                 export XDRIVER
 480                                 ;;
 481
 482                         xvideomode=*)
 483                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 484                                 export XVIDEOMODE
 485                                 ;;
 486                 esac
 487         done
 488
 489         # sort of compatibility with netboot.h from linux docs
 490         if [ -z "${NETBOOT}" ]
 491         then
 492                 if [ "${ROOT}" = "/dev/nfs" ]
 493                 then
 494                         NETBOOT="nfs"
 495                         export NETBOOT
 496                 elif [ "${ROOT}" = "/dev/cifs" ]
 497                 then
 498                         NETBOOT="cifs"
 499                         export NETBOOT
 500                 fi
 501         fi
 502
 503         if [ -z "${MODULE}" ]
 504         then
 505                 MODULE="filesystem"
 506                 export MODULE
 507         fi
 508
 509         if [ -z "${UNIONTYPE}" ]
 510         then
 511                 UNIONTYPE="aufs"
 512                 export UNIONTYPE
 513         fi
 514 }
 515
 516 is_live_path ()
 517 {
 518         DIRECTORY="${1}"
 519
 520         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 521         then
 522                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
 523                 do
 524                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 525                         then
 526                                 return 0
 527                         fi
 528                 done
 529         fi
 530
 531         return 1
 532 }
 533
 534 matches_uuid ()
 535 {
 536         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 537         then
 538                 return 0
 539         fi
 540
 541         path="${1}"
 542         uuid="$(cat /conf/uuid.conf)"
 543
 544         for try_uuid_file in "${path}/.disk/live-uuid"*
 545         do
 546                 [ -e "${try_uuid_file}" ] || continue
 547
 548                 try_uuid="$(cat "${try_uuid_file}")"
 549
 550                 if [ "${uuid}" = "${try_uuid}" ]
 551                 then
 552                         return 0
 553                 fi
 554         done
 555
 556         return 1
 557 }
 558
 559 get_backing_device ()
 560 {
 561         case "${1}" in
 562                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 563                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 564                         ;;
 565
 566                 *.dir)
 567                         echo "directory"
 568                         ;;
 569
 570                 *)
 571                         panic "Unrecognized live filesystem: ${1}"
 572                         ;;
 573         esac
 574 }
 575
 576 match_files_in_dir ()
 577 {
 578         # Does any files match pattern ${1} ?
 579         local pattern="${1}"
 580
 581         if [ "$(echo ${pattern})" != "${pattern}" ]
 582         then
 583                 return 0
 584         fi
 585
 586         return 1
 587 }
 588
 589 mount_images_in_directory ()
 590 {
 591         directory="${1}"
 592         rootmnt="${2}"
 593         mac="${3}"
 594
 595
 596         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 597                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 598                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 599                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 600                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 601                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 602         then
 603                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 604                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 605         else
 606                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 607         fi
 608 }
 609
 610 is_nice_device ()
 611 {
 612         sysfs_path="${1#/sys}"
 613
 614         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-(ide|scsi|usb))"
 615         then
 616                 return 0
 617         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 618         then
 619                 return 0
 620         fi
 621
 622         return 1
 623 }
 624
 625 copy_live_to ()
 626 {
 627         copyfrom="${1}"
 628         copytodev="${2}"
 629         copyto="${copyfrom}_swap"
 630
 631         if [ -z "${MODULETORAM}" ]
 632         then
 633                 size=$(fs_size "" ${copyfrom} "used")
 634         else
 635                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 636
 637                 if [ -f "${MODULETORAMFILE}" ]
 638                 then
 639                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 640                 else
 641                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 642                         return 1
 643                 fi
 644         fi
 645
 646         if [ "${copytodev}" = "ram" ]
 647         then
 648                 # copying to ram:
 649                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( awk '/\<Cached/{print $2}' /proc/meminfo ) )
 650                 mount_options="-o size=${size}k"
 651                 free_string="memory"
 652                 fstype="tmpfs"
 653                 dev="/dev/shm"
 654         else
 655                 # it should be a writable block device
 656                 if [ -b "${copytodev}" ]
 657                 then
 658                         dev="${copytodev}"
 659                         free_string="space"
 660                         fstype=$(get_fstype "${dev}")
 661                         freespace=$(fs_size "${dev}")
 662                 else
 663                         log_warning_msg "${copytodev} is not a block device."
 664                         return 1
 665                 fi
 666         fi
 667
 668         if [ "${freespace}" -lt "${size}" ]
 669         then
 670                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 671                 return 1
 672         fi
 673
 674         # begin copying (or uncompressing)
 675         mkdir "${copyto}"
 676         echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 677         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 678
 679         if [ "${extension}" = "tgz" ]
 680         then
 681                 cd "${copyto}"
 682                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 683                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 684                 mount -r -o move "${copyto}" "${rootmnt}"
 685                 cd "${OLDPWD}"
 686         else
 687                 if [ -n "${MODULETORAMFILE}" ]
 688                 then
 689                         cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 690                 else
 691                         cp -a ${copyfrom}/* ${copyto}   # "cp -a" from busybox also copies hidden files
 692                 fi
 693
 694                 umount ${copyfrom}
 695                 mount -r -o move ${copyto} ${copyfrom}
 696         fi
 697
 698         rmdir ${copyto}
 699         return 0
 700 }
 701
 702 do_netmount ()
 703 {
 704         rc=1
 705
 706         modprobe -q af_packet # For DHCP
 707
 708         if [ -x /sbin/udevadm ]
 709         then
 710                 # lenny
 711                 udevadm trigger
 712                 udevadm settle
 713         else
 714                 # etch
 715                 udevtrigger
 716                 udevsettle
 717         fi
 718
 719         ipconfig ${DEVICE} | tee /netboot.config
 720
 721         # source relevant ipconfig output
 722         OLDHOSTNAME=${HOSTNAME}
 723         . /tmp/net-${DEVICE}.conf
 724         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 725         export HOSTNAME
 726
 727         # Check if we have a network device at all
 728         if ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 729            ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 730            ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 731            ! ls /sys/class/net/ra0 > /dev/null 2>&1
 732         then
 733                 panic "No supported network device found, maybe a non-mainline driver is required."
 734         fi
 735
 736         if [ "${NFSROOT}" = "auto" ]
 737         then
 738                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 739         fi
 740
 741         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] ) && do_httpmount
 742         then
 743                 rc=0
 744                 return ${rc}
 745         fi
 746
 747         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 748         then
 749                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 750         fi
 751
 752         log_begin_msg "Trying netboot from ${NFSROOT}"
 753
 754         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 755         then
 756                 rc=0
 757         elif do_nfsmount
 758         then
 759                 NETBOOT="nfs"
 760                 export NETBOOT
 761                 rc=0
 762         fi
 763
 764         log_end_msg
 765         return ${rc}
 766 }
 767
 768 do_httpmount ()
 769 {
 770         rc=1
 771         dest="${mountpoint}/${LIVE_MEDIA_PATH}"
 772         mount -t ramfs ram "${mountpoint}"
 773         mkdir -p "${dest}"
 774
 775         for webfile in HTTPFS FTPFS FETCH
 776         do
 777                 url="$(eval echo \"\$\{${webfile}\}\")"
 778                 extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
 779
 780                 if [ -n "$url" ]
 781                 then
 782                         case "${extension}" in
 783                                 squashfs|tgz|tar)
 784                                         if [ "${webfile}" = "FETCH" ]
 785                                         then
 786                                                 case "$url" in
 787                                                         tftp*)
 788                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
 789                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
 790                                                                 lfile="$(basename $url)"
 791                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
 792                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
 793                                                         ;;
 794
 795                                                         *)
 796                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
 797                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
 798                                                                 ;;
 799                                                 esac
 800                                         else
 801                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
 802                                                 if [ "${webfile}" = "FTPFS" ]
 803                                                 then
 804                                                         FUSE_MOUNT="curlftpfs"
 805                                                         url="$(dirname ${url})"
 806                                                 else
 807                                                         FUSE_MOUNT="httpfs"
 808                                                 fi
 809                                                 modprobe fuse
 810                                                 $FUSE_MOUNT "${url}" "${dest}"
 811                                         fi
 812                                         [ ${?} -eq 0 ] && rc=0
 813                                         [ "${extension}" = "tgz" ] && live_dest="ram"
 814                                         break
 815                                         ;;
 816
 817                                 *)
 818                                         log_begin_msg "Unrecognized archive extension for ${url}"
 819                                         ;;
 820                         esac
 821                 fi
 822         done
 823
 824         if [ ${rc} != 0 ]
 825         then
 826             umount "${mountpoint}"
 827         fi
 828
 829         return ${rc}
 830 }
 831
 832 do_nfsmount ()
 833 {
 834         rc=1
 835
 836         modprobe -q nfs
 837
 838         if [ -z "${NFSOPTS}" ]
 839         then
 840                 NFSOPTS=""
 841         fi
 842
 843         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 844
 845         # FIXME: This while loop is an ugly HACK round an nfs bug
 846         i=0
 847         while [ "$i" -lt 60 ]
 848         do
 849                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 850                 sleep 1
 851                 i="$(($i + 1))"
 852         done
 853
 854         return ${rc}
 855 }
 856
 857 do_cifsmount ()
 858 {
 859         rc=1
 860
 861         if [ -x "/sbin/mount.cifs" ]
 862         then
 863                 if [ -z "${NFSOPTS}" ]
 864                 then
 865                         CIFSOPTS="-ouser=root,password="
 866                 else
 867                         CIFSOPTS="${NFSOPTS}"
 868                 fi
 869
 870                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 871                 modprobe -q cifs
 872
 873                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 874                 then
 875                         rc=0
 876                 fi
 877         fi
 878
 879         return ${rc}
 880 }
 881
 882 do_snap_copy ()
 883 {
 884         fromdev="${1}"
 885         todir="${2}"
 886         snap_type="${3}"
 887         size=$(fs_size "${fromdev}" "" "used")
 888
 889         if [ -b "${fromdev}" ]
 890         then
 891                 # look for free mem
 892                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 893                 then
 894                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
 895                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
 896                 else
 897                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( awk '/\<Cached/{print $2}' /proc/meminfo))
 898                 fi
 899
 900                 tomount="/mnt/tmpsnap"
 901
 902                 if [ ! -d "${tomount}" ]
 903                 then
 904                         mkdir -p "${tomount}"
 905                 fi
 906
 907                 fstype=$(get_fstype "${fromdev}")
 908
 909                 if [ -n "${fstype}" ]
 910                 then
 911                         # Copying stuff...
 912                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
 913                         cp -a "${tomount}"/* ${todir}
 914                         umount "${tomount}"
 915                 else
 916                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 917                 fi
 918
 919                 rmdir "${tomount}"
 920
 921                 if echo ${fromdev} | grep -qs loop
 922                 then
 923                         losetup -d "${fromdev}"
 924                 fi
 925
 926                 return 0
 927         else
 928                 return 1
 929
 930                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 931         fi
 932 }
 933
 934 find_snap ()
 935 {
 936         # Look for ${snap_label}.* in block devices
 937         snap_label="${1}"
 938
 939         if [ "${PERSISTENT}" != "nofiles" ]
 940         then
 941                 # search for image files
 942                 snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.ext4 ${snap_label}.jffs2")
 943         fi
 944
 945         if [ -z "${snapdata}" ]
 946         then
 947                 snapdata=$(find_cow_device "${snap_label}")
 948         fi
 949         echo "${snapdata}"
 950 }
 951
 952 try_snap ()
 953 {
 954         # copy the contents of previously found snapshot to ${snap_mount}
 955         # and remember the device and filename for resync on exit in live-initramfs.init
 956
 957         snapdata="${1}"
 958         snap_mount="${2}"
 959         snap_type="${3}"
 960
 961         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
 962         then
 963                 log_success_msg "found snapshot: ${snapdata}"
 964                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 965                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 966                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 967
 968                 RES=""
 969                 if ! try_mount "${snapdev}" "${snapback}" "ro"
 970                 then
 971                         break
 972                 fi
 973
 974                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
 975                 then
 976                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
 977                         dev=$(get_backing_device "${snapback}/${snapfile}")
 978
 979                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 980                         RES=$?
 981                 else
 982                         # cpio.gz snapshot
 983                         cd "${snap_mount}"
 984                         zcat "${snapback}/${snapfile}" | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories > /dev/null 2>&1
 985                         RES=$?
 986                         if [ "${RES}" != "0" ]
 987                         then
 988                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories\""
 989                         fi
 990                         cd "${OLDPWD}"
 991                 fi
 992
 993                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
 994
 995                 if [ "${RES}" != "0" ]
 996                 then
 997                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
 998                 fi
 999
1000         elif [ -b "${snapdata}" ]
1001         then
1002                 # Try to find if it could be a snapshot partition
1003                 dev="${snapdata}"
1004                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
1005                 if echo "${dev}" | grep -qs loop
1006                 then
1007                         # strange things happens, user confused?
1008                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
1009                         snapfile=$(basename ${snaploop})
1010                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
1011                 else
1012                         snapdev="${dev}"
1013                 fi
1014
1015                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1016                 then
1017                         log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1018                         return 1
1019                 else
1020                         if [ -n "${snapfile}" ]
1021                         then
1022                                 # it was a loop device, user confused
1023                                 umount ${snapdev}
1024                         fi
1025                 fi
1026         else
1027                 log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1028                 return 1
1029         fi
1030
1031         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
1032         return 0
1033 }
1034
1035 setup_unionfs ()
1036 {
1037         image_directory="${1}"
1038         rootmnt="${2}"
1039         addimage_directory="${3}"
1040         modprobe -q -b ${UNIONTYPE}
1041
1042         # run-init can't deal with images in a subdir, but we're going to
1043         # move all of these away before it runs anyway.  No, we're not,
1044         # put them in / since move-mounting them into / breaks mono and
1045         # some other apps.
1046
1047         croot="/"
1048
1049         # Let's just mount the read-only file systems first
1050         rofsstring=""
1051         rofslist=""
1052         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
1053
1054         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
1055         then
1056                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
1057                 roopt="nfsro"
1058         elif [ "${UNIONTYPE}" = "aufs" ]
1059         then
1060                 roopt="rr"
1061         else
1062                 roopt="ro"
1063         fi
1064
1065         if [ -z "${PLAIN_ROOT}" ]
1066         then
1067                 # Read image names from ${MODULE}.module if it exists
1068                 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1069                 then
1070                         for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1071                         do
1072                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1073                         done
1074                 elif [ -e "${image_directory}/${MODULE}.module" ]
1075                 then
1076                         for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1077                         do
1078                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1079                         done
1080                 else
1081                         # ${MODULE}.module does not exist, create a list of images
1082                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1083                         do
1084                                 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1085                                 do
1086                                         if [ -e "${IMAGE}" ]
1087                                         then
1088                                                 image_string="${image_string} ${IMAGE}"
1089                                         fi
1090                                 done
1091                         done
1092
1093                         if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1094                         then
1095                                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1096                                 do
1097                                         for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1098                                         do
1099                                                 if [ -e "${IMAGE}" ]
1100                                                 then
1101                                                         image_string="${image_string} ${IMAGE}"
1102                                                 fi
1103                                         done
1104                                 done
1105                         fi
1106
1107                         # Now sort the list
1108                         image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1109                 fi
1110
1111         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1112
1113                 mkdir -p "${croot}"
1114
1115                 for image in ${image_string}
1116                 do
1117                         imagename=$(basename "${image}")
1118
1119                         export image devname
1120                         maybe_break live-realpremount
1121                         log_begin_msg "Running /scripts/live-realpremount"
1122                         run_scripts /scripts/live-realpremount
1123                         log_end_msg
1124
1125                         if [ -d "${image}" ]
1126                         then
1127                                 # it is a plain directory: do nothing
1128                                 rofsstring="${image}=${roopt}:${rofsstring}"
1129                                 rofslist="${image} ${rofslist}"
1130                         elif [ -f "${image}" ]
1131                         then
1132                                 if losetup --help 2>&1 | grep -q -- "-r\b"
1133                                 then
1134                                         backdev=$(get_backing_device "${image}" "-r")
1135                                 else
1136                                         backdev=$(get_backing_device "${image}")
1137                                 fi
1138                                 fstype=$(get_fstype "${backdev}")
1139
1140                                 if [ "${fstype}" = "unknown" ]
1141                                 then
1142                                         panic "Unknown file system type on ${backdev} (${image})"
1143                                 fi
1144
1145                                 if [ -z "${fstype}" ]
1146                                 then
1147                                         fstype="${imagename##*.}"
1148                                         log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1149                                 fi
1150
1151                                 mkdir -p "${croot}/${imagename}"
1152                                 log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
1153                                 mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
1154                                 log_end_msg
1155                         fi
1156                 done
1157         else
1158                 # we have a plain root system
1159                 mkdir -p "${croot}/filesystem"
1160                 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
1161                 mount -t $(get_fstype "${image_directory}") -o ro,noatime "${image_directory}" "${croot}/filesystem" || panic "Can not mount ${image_directory} on ${croot}/filesystem" && rofsstring="${croot}/filesystem=${roopt}:${rofsstring}" && rofslist="${croot}/filesystem ${rofslist}"
1162                 # probably broken:
1163                 mount -o bind ${croot}/filesystem $mountpoint
1164                 log_end_msg
1165         fi
1166
1167         rofsstring=${rofsstring%:}
1168
1169         mkdir -p /cow
1170
1171         # Looking for "${root_persistence}" device or file
1172         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1173         then
1174                 # Load USB modules
1175                 num_block=$(ls -l /sys/block | wc -l)
1176                 for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1177                 do
1178                         modprobe -q -b ${module}
1179                 done
1180
1181                 if [ -x /sbin/udevadm ]
1182                 then
1183                         # lenny
1184                         udevadm trigger
1185                         udevadm settle
1186                 else
1187                         # etch
1188                         udevtrigger
1189                         udevsettle
1190                 fi
1191
1192                 # For some reason, udevsettle does not block in this scenario,
1193                 # so we sleep for a little while.
1194                 #
1195                 # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1196                 for timeout in 5 4 3 2 1
1197                 do
1198                         sleep 1
1199
1200                         if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1201                         then
1202                                 break
1203                         fi
1204                 done
1205
1206                 # search for label and files (this could be hugely optimized)
1207                 cowprobe=$(find_cow_device "${root_persistence}")
1208                 if [ -b "${cowprobe}" ]
1209                 then
1210                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1211                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1212                         # snapshots to be sure to really store some e.g key config files,
1213                         # but not on the same media
1214                         blacklistdev="${cowprobe}"
1215                         PERSISTENCE_IS_ON="1"
1216                         export PERSISTENCE_IS_ON
1217                 fi
1218                 # homecow just mount something on /home, this should be generalized some way
1219                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1220                 if [ -b "${homecow}" ]
1221                 then
1222                         PERSISTENCE_IS_ON="1"
1223                         export PERSISTENCE_IS_ON
1224                 fi
1225                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1226                 # This second type should be removed when snapshot will get smarter,
1227                 # hence when "/etc/live-snapshot*list" will be supported also by
1228                 # ext2|ext3|ext4|jffs2 snapshot types.
1229                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1230
1231                 if [ -b "${cowprobe}" ]
1232                 then
1233                         cowdevice=${cowprobe}
1234                         cow_fstype=$(get_fstype "${cowprobe}")
1235                         cow_mountopt="rw,noatime"
1236
1237                         if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
1238                         then
1239                                 fsck -y ${cowdevice}
1240                         fi
1241                 else
1242                         log_warning_msg "Unable to find the persistent medium"
1243                         cowdevice="tmpfs"
1244                         cow_fstype="tmpfs"
1245                         cow_mountopt="rw,noatime,mode=755"
1246                 fi
1247         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1248         then
1249                 # check if there are any nfs options
1250                 if echo ${NFS_COW}|grep -q ','
1251                 then
1252                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1253                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1254                 else
1255                         nfs_cow_opts="-o nolock"
1256                         nfs_cow=${NFS_COW}
1257                 fi
1258                 mac="$(get_mac)"
1259                 if [ -n "${mac}" ]
1260                 then
1261                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1262                         cow_fstype="nfs"
1263                 else
1264                         panic "unable to determine mac address"
1265                 fi
1266         else
1267                 cowdevice="tmpfs"
1268                 cow_fstype="tmpfs"
1269                 cow_mountopt="rw,noatime,mode=755"
1270         fi
1271
1272         if [ "${cow_fstype}" = "nfs" ]
1273         then
1274                 log_begin_msg \
1275                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1276                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1277                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1278         else
1279                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1280                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1281         fi
1282
1283         rofscount=$(echo ${rofslist} |wc -w)
1284
1285         if [ -n "${EXPOSED_ROOT}" ]
1286         then
1287                 if [ ${rofscount} -ne 1 ]
1288                 then
1289                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1290                 fi
1291                 exposedrootfs=${rofslist%% }
1292
1293                 mount --bind ${exposedrootfs} ${rootmnt} || \
1294                         panic "bind mount of ${exposedrootfs} failed"
1295
1296                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1297                 then
1298                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1299                 else
1300                         cow_dirs=''
1301                 fi
1302
1303                 for dir in ${cow_dirs}; do
1304                         mkdir -p /cow${dir}
1305                         mount -t ${UNIONTYPE} \
1306                                 -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
1307                                 ${UNIONTYPE} "${rootmnt}${dir}" || \
1308                                 panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
1309                                         rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1310                 done
1311         else
1312                 mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
1313                         ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
1314                         ${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
1315         fi
1316
1317         # Correct the permissions of /:
1318         chmod 0755 "${rootmnt}"
1319
1320         # tmpfs file systems
1321         touch /etc/fstab
1322         mkdir -p "${rootmnt}/live"
1323         mount -t tmpfs tmpfs ${rootmnt}/live
1324
1325         # Adding other custom mounts
1326         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1327         then
1328                 # directly mount /home
1329                 # FIXME: add a custom mounts configurable system
1330
1331                 if [ -b "${homecow}" ]
1332                 then
1333                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1334                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1335                 else
1336                         log_warning_msg "Unable to find the persistent home medium"
1337                 fi
1338
1339                 # Look for other snapshots to copy in
1340                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1341                 # This second type should be removed when snapshot grow smarter
1342                 try_snap "${home_snapdata}" "${rootmnt}/home" "HOME"
1343         fi
1344
1345         if [ -n "${SHOWMOUNTS}" ]
1346         then
1347                 for d in ${rofslist}
1348                 do
1349                         mkdir -p "${rootmnt}/live/${d##*/}"
1350
1351                         case d in
1352                                 *.dir)
1353                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1354                                         ;;
1355
1356                                 *)
1357                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1358                                         ;;
1359                         esac
1360                 done
1361         fi
1362
1363         # shows cow fs on /cow for use by live-snapshot
1364         mkdir -p "${rootmnt}/live/cow"
1365         mount -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"
1366 }
1367
1368 check_dev ()
1369 {
1370         sysdev="${1}"
1371         devname="${2}"
1372         skip_uuid_check="${3}"
1373
1374         if [ -z "${devname}" ]
1375         then
1376                 devname=$(sys2dev "${sysdev}")
1377         fi
1378
1379         if [ -d "${devname}" ]
1380         then
1381                 mount -o bind "${devname}" $mountpoint || continue
1382
1383                 if is_live_path $mountpoint
1384                 then
1385                         echo $mountpoint
1386                         return 0
1387                 else
1388                         umount $mountpoint
1389                 fi
1390         fi
1391
1392         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1393         then
1394                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1395                 devname="${loopdevname}"
1396         fi
1397
1398         fstype=$(get_fstype "${devname}")
1399
1400         if is_supported_fs ${fstype}
1401         then
1402                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1403
1404                 if is_live_path ${mountpoint} && \
1405                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1406                 then
1407                         echo ${mountpoint}
1408                         return 0
1409                 else
1410                         umount ${mountpoint}
1411                 fi
1412         fi
1413
1414         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1415         then
1416                 losetup -d "${loopdevname}"
1417         fi
1418
1419         return 1
1420 }
1421
1422 find_livefs ()
1423 {
1424         timeout="${1}"
1425
1426         # don't start autodetection before timeout has expired
1427         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1428         then
1429                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1430                 then
1431                         return 1
1432                 fi
1433         fi
1434
1435         # first look at the one specified in the command line
1436         case "${LIVE_MEDIA}" in
1437                 removable-usb)
1438                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1439                         do
1440                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1441                                 then
1442                                         if readlink ${sysblock} | grep -q usb ||
1443                                            readlink ${sysblock}/device | grep -q usb # linux < 2.6.29
1444                                         then
1445                                                 for dev in $(subdevices "${sysblock}")
1446                                                 do
1447                                                         if check_dev "${dev}"
1448                                                         then
1449                                                                 return 0
1450                                                         fi
1451                                                 done
1452                                         fi
1453                                 fi
1454                         done
1455                         ;;
1456
1457                 removable)
1458                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1459                         do
1460                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1461                                 then
1462                                         for dev in $(subdevices "${sysblock}")
1463                                         do
1464                                                 if check_dev "${dev}"
1465                                                 then
1466                                                         return 0
1467                                                 fi
1468                                         done
1469                                 fi
1470                         done
1471                         ;;
1472
1473                 *)
1474                         if [ ! -z "${LIVE_MEDIA}" ]
1475                         then
1476                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1477                                 then
1478                                         return 0
1479                                 fi
1480                         fi
1481                         ;;
1482         esac
1483
1484         # or do the scan of block devices
1485         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1486         do
1487                 devname=$(sys2dev "${sysblock}")
1488                 fstype=$(get_fstype "${devname}")
1489
1490                 if /lib/udev/cdrom_id ${devname} > /dev/null
1491                 then
1492                         if check_dev "null" "${devname}"
1493                         then
1494                                 return 0
1495                         fi
1496                 elif is_nice_device "${sysblock}"
1497                 then
1498                         for dev in $(subdevices "${sysblock}")
1499                         do
1500                                 if check_dev "${dev}"
1501                                 then
1502                                         return 0
1503                                 fi
1504                         done
1505                 elif [ "${fstype}" = "squashfs" -o \
1506                         "${fstype}" = "ext2" -o \
1507                         "${fstype}" = "ext3" -o \
1508                         "${fstype}" = "ext4" -o \
1509                         "${fstype}" = "jffs2" ]
1510                 then
1511                         # This is an ugly hack situation, the block device has
1512                         # an image directly on it.  It's hopefully
1513                         # live-initramfs, so take it and run with it.
1514                         ln -s "${devname}" "${devname}.${fstype}"
1515                         echo "${devname}.${fstype}"
1516                         return 0
1517                 fi
1518         done
1519
1520         return 1
1521 }
1522
1523 set_usplash_timeout ()
1524 {
1525         if [ -x /sbin/usplash_write ]
1526         then
1527                 /sbin/usplash_write "TIMEOUT 120"
1528         else if [ -x /sbin/splashy_update ] ; then
1529                 /sbin/splashy_update "TIMEOUT 120"
1530         fi ; fi
1531 }
1532
1533 integrity_check ()
1534 {
1535         media_mountpoint="${1}"
1536
1537         log_begin_msg "Checking media integrity"
1538
1539         cd ${media_mountpoint}
1540         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1541         RC="${?}"
1542
1543         log_end_msg
1544
1545         if [ "${RC}" -eq 0 ]
1546         then
1547                 log_success_msg "Everything ok, will reboot in 10 seconds."
1548                 sleep 10
1549                 cd /
1550                 umount ${media_mountpoint}
1551                 sync
1552                 echo u > /proc/sysrq-trigger
1553                 echo b > /proc/sysrq-trigger
1554         else
1555                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1556         fi
1557 }
1558
1559 mountroot ()
1560 {
1561         if [ -x /scripts/local-top/cryptroot ]; then
1562             /scripts/local-top/cryptroot
1563         fi
1564
1565         exec 6>&1
1566         exec 7>&2
1567         exec > live.log
1568         exec 2>&1
1569         tail -f live.log >&7 &
1570         tailpid="${!}"
1571
1572         # Ensure 'panic' function is overridden
1573         . /scripts/live-functions
1574
1575         Arguments
1576
1577         set_usplash_timeout
1578
1579         maybe_break live-premount
1580         log_begin_msg "Running /scripts/live-premount"
1581         run_scripts /scripts/live-premount
1582         log_end_msg
1583
1584         # Needed here too because some things (*cough* udev *cough*)
1585         # changes the timeout
1586
1587         set_usplash_timeout
1588
1589         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1590         then
1591                 if do_netmount
1592                 then
1593                         livefs_root="${mountpoint}"
1594                 else
1595                         panic "Unable to find a live file system on the network"
1596                 fi
1597         else
1598                 if [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1599                 then
1600                         # Do a local boot from hd
1601                         livefs_root=${ROOT}
1602                 else
1603                         # Scan local devices for the image
1604                         i=0
1605                         while [ "$i" -lt 60 ]
1606                         do
1607                                 livefs_root=$(find_livefs ${i})
1608
1609                                 if [ -n "${livefs_root}" ]
1610                                 then
1611                                         break
1612                                 fi
1613
1614                                 sleep 1
1615                                 i="$(($i + 1))"
1616                         done
1617                 fi
1618         fi
1619
1620         if [ -z "${livefs_root}" ]
1621         then
1622                 panic "Unable to find a medium containing a live file system"
1623         fi
1624
1625         if [ "${INTEGRITY_CHECK}" ]
1626         then
1627                 integrity_check "${livefs_root}"
1628         fi
1629
1630         if [ "${TORAM}" ]
1631         then
1632                 live_dest="ram"
1633         elif [ "${TODISK}" ]
1634         then
1635                 live_dest="${TODISK}"
1636         fi
1637
1638         if [ "${live_dest}" ]
1639         then
1640                 log_begin_msg "Copying live media to ${live_dest}"
1641                 copy_live_to "${livefs_root}" "${live_dest}"
1642                 log_end_msg
1643         fi
1644
1645         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
1646         then
1647                 setup_unionfs "${livefs_root}" "${rootmnt}"
1648         else
1649                 mac="$(get_mac)"
1650                 mac="$(echo ${mac} | sed 's/-//g')"
1651                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1652         fi
1653
1654         log_end_msg
1655
1656         maybe_break live-bottom
1657         log_begin_msg "Running /scripts/live-bottom\n"
1658
1659         run_scripts /scripts/live-bottom
1660         log_end_msg
1661
1662         exec 1>&6 6>&-
1663         exec 2>&7 7>&-
1664         kill ${tailpid}
1665         [ -w "${rootmnt}/var/log/" ] && cp live.log "${rootmnt}/var/log/" 2>/dev/null
1666 }