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