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="${ARGUMENT#hostname=}"
  96                                 LIVECONF="changed"
  97                                 export HOSTNAME LIVECONF
  98                                 ;;
  99
 100                         isofrom=*|fromiso=*)
 101                                 FROMISO="${ARGUMENT#*=}"
 102                                 export FROMISO
 103                                 ;;
 104
 105                         username=*)
 106                                 USERNAME="${ARGUMENT#username=}"
 107                                 LIVECONF="changed"
 108                                 export USERNAME LIVECONF
 109                                 ;;
 110
 111                         userfullname=*)
 112                                 USERFULLNAME="${ARGUMENT#userfullname=}"
 113                                 LIVECONF="changed"
 114                                 export USERFULLNAME LIVECONF
 115                                 ;;
 116
 117                         ignore_uuid)
 118                                 IGNORE_UUID="Yes"
 119                                 export IGNORE_UUID
 120                                 ;;
 121
 122                         integrity-check)
 123                                 INTEGRITY_CHECK="Yes"
 124                                 export INTEGRITY_CHECK
 125                                 ;;
 126
 127                         ip=*)
 128                                 STATICIP="${ARGUMENT#ip=}"
 129
 130                                 if [ -z "${STATICIP}" ]
 131                                 then
 132                                         STATICIP="frommedia"
 133                                 fi
 134
 135                                 export STATICIP
 136                                 ;;
 137
 138                         keyb=*|kbd-chooser/method=*)
 139                                 KBD="${ARGUMENT#*=}"
 140                                 export KBD
 141                                 ;;
 142
 143                         klayout=*|console-setup/layoutcode=*)
 144                                 KLAYOUT="${ARGUMENT#*=}"
 145                                 export KLAYOUT
 146                                 ;;
 147
 148                         kvariant=*|console-setup/variantcode=*)
 149                                 KVARIANT="${ARGUMENT#*=}"
 150                                 export KVARIANT
 151                                 ;;
 152
 153                         kmodel=*|console-setup/modelcode=*)
 154                                 KMODEL="${ARGUMENT#*=}"
 155                                 export KMODEL
 156                                 ;;
 157
 158                         koptions=*)
 159                                 KOPTIONS="${ARGUMENT#koptions=}"
 160                                 export KOPTIONS
 161                                 ;;
 162
 163                         live-getty)
 164                                 LIVE_GETTY="1"
 165                                 export LIVE_GETTY
 166                                 ;;
 167
 168                         live-media=*|bootfrom=*)
 169                                 LIVE_MEDIA="${ARGUMENT#*=}"
 170                                 export LIVE_MEDIA
 171                                 ;;
 172
 173                         live-media-encryption=*|encryption=*)
 174                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 175                                 export LIVE_MEDIA_ENCRYPTION
 176                                 ;;
 177
 178                         live-media-offset=*)
 179                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 180                                 export LIVE_MEDIA_OFFSET
 181                                 ;;
 182
 183                         live-media-path=*)
 184                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 185                                 export LIVE_MEDIA_PATH
 186                                 ;;
 187
 188                         live-media-timeout=*)
 189                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 190                                 export LIVE_MEDIA_TIMEOUT
 191                                 ;;
 192
 193                         language=*|debian-installer/language=*)
 194                                 language=${x#debian-installer/language=}
 195                                 locale="$(lang2locale "$language")"
 196                                 set_locale="true"
 197                                 ;;
 198
 199                         locale=*|debian-installer/locale=*)
 200                                 LOCALE="${ARGUMENT#*=}"
 201                                 export LOCALE
 202                                 ;;
 203
 204                         module=*)
 205                                 MODULE="${ARGUMENT#module=}"
 206                                 export MODULE
 207                                 ;;
 208
 209                         netboot=*)
 210                                 NETBOOT="${ARGUMENT#netboot=}"
 211                                 export NETBOOT
 212                                 ;;
 213
 214                         nfsopts=*)
 215                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 216                                 export NFSOPTS
 217                                 ;;
 218
 219                         nfscow=*)
 220                                 NFS_COW="${ARGUMENT#nfscow=}"
 221                                 export NFS_COW
 222                                 ;;
 223
 224                         noaccessibility)
 225                                 NOACCESSIBILITY="Yes"
 226                                 export NOACCESSIBILITY
 227                                 ;;
 228
 229                         noapparmor)
 230                                 NOAPPARMOR="Yes"
 231                                 export NOAPPARMOR
 232                                 ;;
 233
 234                         noaptcdrom)
 235                                 NOAPTCDROM="Yes"
 236                                 export NOAPTCDROM
 237                                 ;;
 238
 239                         noautologin)
 240                                 NOAUTOLOGIN="Yes"
 241                                 export NOAUTOLOGIN
 242                                 ;;
 243
 244                         noxautologin)
 245                                 NOXAUTOLOGIN="Yes"
 246                                 export NOXAUTOLOGIN
 247                                 ;;
 248
 249                         noconsolekeyboard)
 250                                 NOCONSOLEKEYBOARD="Yes"
 251                                 export NOCONSOLEKEYBOARD
 252                                 ;;
 253
 254                         nofastboot)
 255                                 NOFASTBOOT="Yes"
 256                                 export NOFASTBOOT
 257                                 ;;
 258
 259                         nofstab)
 260                                 NOFSTAB="Yes"
 261                                 export NOFSTAB
 262                                 ;;
 263
 264                         nognomepanel)
 265                                 NOGNOMEPANEL="Yes"
 266                                 export NOGNOMEPANEL
 267                                 ;;
 268
 269                         nohosts)
 270                                 NOHOSTS="Yes"
 271                                 export NOHOSTS
 272                                 ;;
 273
 274                         nokpersonalizer)
 275                                 NOKPERSONALIZER="Yes"
 276                                 export NOKPERSONALIZER
 277                                 ;;
 278
 279                         nolanguageselector)
 280                                 NOLANGUAGESELECTOR="Yes"
 281                                 export NOLANGUAGESELECTOR
 282                                 ;;
 283
 284                         nolocales)
 285                                 NOLOCALES="Yes"
 286                                 export NOLOCALES
 287                                 ;;
 288
 289                         nonetworking)
 290                                 NONETWORKING="Yes"
 291                                 export NONETWORKING
 292                                 ;;
 293
 294                         nopowermanagement)
 295                                 NOPOWERMANAGEMENT="Yes"
 296                                 export NOPOWERMANAGEMENT
 297                                 ;;
 298
 299                         noprogramcrashes)
 300                                 NOPROGRAMCRASHES="Yes"
 301                                 export NOPROGRAMCRASHES
 302                                 ;;
 303
 304                         nojockey)
 305                                 NOJOCKEY="Yes"
 306                                 export NOJOCKEY
 307                                 ;;
 308
 309                         nosudo)
 310                                 NOSUDO="Yes"
 311                                 export NOSUDO
 312                                 ;;
 313
 314                         swapon)
 315                                 SWAPON="Yes"
 316                                 export SWAPON
 317                                 ;;
 318
 319                         noupdatenotifier)
 320                                 NOUPDATENOTIFIER="Yes"
 321                                 export NOUPDATENOTIFIER
 322                                 ;;
 323
 324                         nouser)
 325                                 NOUSER="Yes"
 326                                 export NOUSER
 327                                 ;;
 328
 329                         noxautoconfig)
 330                                 NOXAUTOCONFIG="Yes"
 331                                 export NOXAUTOCONFIG
 332                                 ;;
 333
 334                         noxscreensaver)
 335                                 NOXSCREENSAVER="Yes"
 336                                 export NOXSCREENSAVER
 337                                 ;;
 338
 339                         persistent)
 340                                 PERSISTENT="Yes"
 341                                 export PERSISTENT
 342                                 ;;
 343
 344                         persistent=*)
 345                                 PERSISTENT="${ARGUMENT#persistent=}"
 346                                 if [ -z "${PERSISTENT}" ]
 347                                 then
 348                                         PERSISTENT="Yes"
 349                                 fi
 350                                 export PERSISTENT
 351                                 ;;
 352
 353                         persistent-path=*)
 354                                 PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
 355                                 export PERSISTENT_PATH
 356                                 ;;
 357
 358                         persistent-subtext=*)
 359                                 root_persistence="${root_persistence}-${ARGUMENT#persistent-subtext=}"
 360                                 home_persistence="${home_persistence}-${ARGUMENT#persistent-subtext=}"
 361                                 root_snapshot_label="${root_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 362                                 home_snapshot_label="${home_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 363                                 ;;
 364
 365                         nopersistent)
 366                                 NOPERSISTENT="Yes"
 367                                 export NOPERSISTENT
 368                                 ;;
 369
 370                         preseed/file=*|file=*)
 371                                 LOCATION="${ARGUMENT#*=}"
 372                                 export LOCATION
 373                                 ;;
 374
 375                         nopreseed)
 376                                 NOPRESEED="Yes"
 377                                 export NOPRESEED
 378                                 ;;
 379
 380                         url=*)
 381                                 location="${ARGUMENT#url=}"
 382
 383                                 mount -o bind /sys /root/sys
 384                                 mount -o bind /proc /root/proc
 385                                 mount -o bind /dev /root/dev
 386
 387                                 mkdir -p /root/var/run/network
 388                                 chroot /root dhclient eth0
 389                                 chroot /root wget -P /tmp "${location}"
 390                                 chroot /root ifconfig eth0 down
 391
 392                                 umount /root/sys
 393                                 umount /root/proc
 394                                 umount /root/dev
 395
 396                                 LOCATION="/tmp/$(basename "${location}")"
 397                                 ;;
 398
 399                         */*=*)
 400                                 question="${ARGUMENT%%=*}"
 401                                 value="${ARGUMENT#*=}"
 402                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 403                                 export PRESEEDS
 404                                 ;;
 405
 406                         showmounts)
 407                                 SHOWMOUNTS="Yes"
 408                                 export SHOWMOUNTS
 409                                 ;;
 410
 411                         silent)
 412                                 SILENT="Yes"
 413                                 export SILENT
 414                                 ;;
 415
 416                         textonly)
 417                                 TEXTONLY="Yes"
 418                                 export TEXTONLY
 419                                 ;;
 420
 421                         timezone=*)
 422                                 TIMEZONE="${ARGUMENT#timezone=}"
 423                                 export TIMEZONE
 424                                 ;;
 425
 426                         notimezone)
 427                                 NOTIMEZONE="Yes"
 428                                 export NOTIMEZONE
 429                                 ;;
 430
 431                         todisk=*)
 432                                 TODISK="${ARGUMENT#todisk=}"
 433                                 export TODISK
 434                                 ;;
 435
 436                         toram)
 437                                 TORAM="Yes"
 438                                 export TORAM
 439                                 ;;
 440
 441                         toram=*)
 442                                 TORAM="Yes"
 443                                 MODULETORAM="${ARGUMENT#toram=}"
 444                                 export TORAM MODULETORAM
 445                                 ;;
 446
 447                         exposedroot)
 448                                 EXPOSED_ROOT="Yes"
 449                                 export EXPOSED_ROOT
 450                                 ;;
 451
 452                         plainroot)
 453                                 PLAIN_ROOT="Yes"
 454                                 export PLAIN_ROOT
 455                                 ;;
 456
 457                         skipunion)
 458                                 SKIP_UNION_MOUNTS="Yes"
 459                                 export SKIP_UNION_MOUNTS
 460                                 ;;
 461
 462                         root=*)
 463                                 ROOT="${ARGUMENT#root=}"
 464                                 export ROOT
 465                                 ;;
 466
 467                         union=*)
 468                                 UNIONTYPE="${ARGUMENT#union=}"
 469                                 export UNIONTYPE
 470                                 ;;
 471
 472                         utc=*)
 473                                 UTC="${ARGUMENT#utc=}"
 474                                 export UTC
 475                                 ;;
 476
 477                         xdebconf)
 478                                 XDEBCONF="Yes"
 479                                 export XDEBCONF
 480                                 ;;
 481
 482                         xdriver=*)
 483                                 XDRIVER="${ARGUMENT#xdriver=}"
 484                                 export XDRIVER
 485                                 ;;
 486
 487                         xvideomode=*)
 488                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 489                                 export XVIDEOMODE
 490                                 ;;
 491                 esac
 492         done
 493
 494         # sort of compatibility with netboot.h from linux docs
 495         if [ -z "${NETBOOT}" ]
 496         then
 497                 if [ "${ROOT}" = "/dev/nfs" ]
 498                 then
 499                         NETBOOT="nfs"
 500                         export NETBOOT
 501                 elif [ "${ROOT}" = "/dev/cifs" ]
 502                 then
 503                         NETBOOT="cifs"
 504                         export NETBOOT
 505                 fi
 506         fi
 507
 508         if [ -z "${MODULE}" ]
 509         then
 510                 MODULE="filesystem"
 511                 export MODULE
 512         fi
 513
 514         if [ -z "${UNIONTYPE}" ]
 515         then
 516                 UNIONTYPE="aufs"
 517                 export UNIONTYPE
 518         fi
 519 }
 520
 521 is_live_path ()
 522 {
 523         DIRECTORY="${1}"
 524
 525         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 526         then
 527                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
 528                 do
 529                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 530                         then
 531                                 return 0
 532                         fi
 533                 done
 534         fi
 535
 536         return 1
 537 }
 538
 539 matches_uuid ()
 540 {
 541         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 542         then
 543                 return 0
 544         fi
 545
 546         path="${1}"
 547         uuid="$(cat /conf/uuid.conf)"
 548
 549         for try_uuid_file in "${path}/.disk/live-uuid"*
 550         do
 551                 [ -e "${try_uuid_file}" ] || continue
 552
 553                 try_uuid="$(cat "${try_uuid_file}")"
 554
 555                 if [ "${uuid}" = "${try_uuid}" ]
 556                 then
 557                         return 0
 558                 fi
 559         done
 560
 561         return 1
 562 }
 563
 564 get_backing_device ()
 565 {
 566         case "${1}" in
 567                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 568                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 569                         ;;
 570
 571                 *.dir)
 572                         echo "directory"
 573                         ;;
 574
 575                 *)
 576                         panic "Unrecognized live filesystem: ${1}"
 577                         ;;
 578         esac
 579 }
 580
 581 match_files_in_dir ()
 582 {
 583         # Does any files match pattern ${1} ?
 584         local pattern="${1}"
 585
 586         if [ "$(echo ${pattern})" != "${pattern}" ]
 587         then
 588                 return 0
 589         fi
 590
 591         return 1
 592 }
 593
 594 mount_images_in_directory ()
 595 {
 596         directory="${1}"
 597         rootmnt="${2}"
 598         mac="${3}"
 599
 600
 601         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 602                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 603                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 604                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 605                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 606                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 607         then
 608                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 609                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 610         else
 611                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 612         fi
 613 }
 614
 615 is_nice_device ()
 616 {
 617         sysfs_path="${1#/sys}"
 618
 619         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-)"
 620         then
 621                 return 0
 622         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 623         then
 624                 return 0
 625         fi
 626
 627         return 1
 628 }
 629
 630 copy_live_to ()
 631 {
 632         copyfrom="${1}"
 633         copytodev="${2}"
 634         copyto="${copyfrom}_swap"
 635
 636         if [ -z "${MODULETORAM}" ]
 637         then
 638                 size=$(fs_size "" ${copyfrom}/${LIVE_MEDIA_PATH} "used")
 639         else
 640                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 641
 642                 if [ -f "${MODULETORAMFILE}" ]
 643                 then
 644                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 645                 else
 646                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 647                         return 1
 648                 fi
 649         fi
 650
 651         if [ "${copytodev}" = "ram" ]
 652         then
 653                 # copying to ram:
 654                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( awk '/\<Cached/{print $2}' /proc/meminfo ) )
 655                 mount_options="-o size=${size}k"
 656                 free_string="memory"
 657                 fstype="tmpfs"
 658                 dev="/dev/shm"
 659         else
 660                 # it should be a writable block device
 661                 if [ -b "${copytodev}" ]
 662                 then
 663                         dev="${copytodev}"
 664                         free_string="space"
 665                         fstype=$(get_fstype "${dev}")
 666                         freespace=$(fs_size "${dev}")
 667                 else
 668                         log_warning_msg "${copytodev} is not a block device."
 669                         return 1
 670                 fi
 671         fi
 672
 673         if [ "${freespace}" -lt "${size}" ]
 674         then
 675                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 676                 return 1
 677         fi
 678
 679         # begin copying (or uncompressing)
 680         mkdir "${copyto}"
 681         log_begin_msg "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 682         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 683
 684         if [ "${extension}" = "tgz" ]
 685         then
 686                 cd "${copyto}"
 687                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 688                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 689                 mount -r -o move "${copyto}" "${rootmnt}"
 690                 cd "${OLDPWD}"
 691         else
 692                 if [ -n "${MODULETORAMFILE}" ]
 693                 then
 694                         if [ -x /bin/rsync ]
 695                         then
 696                                 echo " * Copying $MODULETORAMFILE to RAM" 1>/dev/console
 697                                 rsync -a --progress ${MODULETORAMFILE} ${copyto} 1>/dev/console # copy only the filesystem module
 698                         else
 699                                 cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 700                         fi
 701                 else
 702                         if [ -x /bin/rsync ]
 703                         then
 704                                 echo " * Copying whole medium to RAM" 1>/dev/console
 705                                 rsync -a --progress ${copyfrom}/* ${copyto} 1>/dev/console  # "cp -a" from busybox also copies hidden files
 706                         else
 707                                 mkdir -p ${copyto}/${LIVE_MEDIA_PATH}
 708                                 cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/* ${copyto}/${LIVE_MEDIA_PATH}   # "cp -a" from busybox also copies hidden files
 709                         fi
 710                 fi
 711
 712                 umount ${copyfrom}
 713                 mount -r -o move ${copyto} ${copyfrom}
 714         fi
 715
 716         rmdir ${copyto}
 717         return 0
 718 }
 719
 720 do_netmount ()
 721 {
 722         rc=1
 723
 724         modprobe -q af_packet # For DHCP
 725
 726         if [ -x /sbin/udevadm ]
 727         then
 728                 # lenny
 729                 udevadm trigger
 730                 udevadm settle
 731         else
 732                 # etch
 733                 udevtrigger
 734                 udevsettle
 735         fi
 736
 737         ipconfig ${DEVICE} | tee /netboot.config
 738
 739         # source relevant ipconfig output
 740         OLDHOSTNAME=${HOSTNAME}
 741         . /tmp/net-${DEVICE}.conf
 742         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 743         export HOSTNAME
 744
 745         # Check if we have a network device at all
 746         if ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 747            ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 748            ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 749            ! ls /sys/class/net/ra0 > /dev/null 2>&1
 750         then
 751                 panic "No supported network device found, maybe a non-mainline driver is required."
 752         fi
 753
 754         if [ "${NFSROOT}" = "auto" ]
 755         then
 756                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 757         fi
 758
 759         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] ) && do_httpmount
 760         then
 761                 rc=0
 762                 return ${rc}
 763         fi
 764
 765         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 766         then
 767                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 768         fi
 769
 770         log_begin_msg "Trying netboot from ${NFSROOT}"
 771
 772         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 773         then
 774                 rc=0
 775         elif do_nfsmount
 776         then
 777                 NETBOOT="nfs"
 778                 export NETBOOT
 779                 rc=0
 780         fi
 781
 782         log_end_msg
 783         return ${rc}
 784 }
 785
 786 do_httpmount ()
 787 {
 788         rc=1
 789         dest="${mountpoint}/${LIVE_MEDIA_PATH}"
 790         mount -t ramfs ram "${mountpoint}"
 791         mkdir -p "${dest}"
 792
 793         for webfile in HTTPFS FTPFS FETCH
 794         do
 795                 url="$(eval echo \"\$\{${webfile}\}\")"
 796                 extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
 797
 798                 if [ -n "$url" ]
 799                 then
 800                         case "${extension}" in
 801                                 squashfs|tgz|tar)
 802                                         if [ "${webfile}" = "FETCH" ]
 803                                         then
 804                                                 case "$url" in
 805                                                         tftp*)
 806                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
 807                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
 808                                                                 lfile="$(basename $url)"
 809                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
 810                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
 811                                                         ;;
 812
 813                                                         *)
 814                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
 815                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
 816                                                                 ;;
 817                                                 esac
 818                                         else
 819                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
 820                                                 if [ "${webfile}" = "FTPFS" ]
 821                                                 then
 822                                                         FUSE_MOUNT="curlftpfs"
 823                                                         url="$(dirname ${url})"
 824                                                 else
 825                                                         FUSE_MOUNT="httpfs"
 826                                                 fi
 827                                                 modprobe fuse
 828                                                 $FUSE_MOUNT "${url}" "${dest}"
 829                                         fi
 830                                         [ ${?} -eq 0 ] && rc=0
 831                                         [ "${extension}" = "tgz" ] && live_dest="ram"
 832                                         break
 833                                         ;;
 834
 835                                 *)
 836                                         log_begin_msg "Unrecognized archive extension for ${url}"
 837                                         ;;
 838                         esac
 839                 fi
 840         done
 841
 842         if [ ${rc} != 0 ]
 843         then
 844             umount "${mountpoint}"
 845         fi
 846
 847         return ${rc}
 848 }
 849
 850 do_nfsmount ()
 851 {
 852         rc=1
 853
 854         modprobe -q nfs
 855
 856         if [ -z "${NFSOPTS}" ]
 857         then
 858                 NFSOPTS=""
 859         fi
 860
 861         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 862
 863         # FIXME: This while loop is an ugly HACK round an nfs bug
 864         i=0
 865         while [ "$i" -lt 60 ]
 866         do
 867                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 868                 sleep 1
 869                 i="$(($i + 1))"
 870         done
 871
 872         return ${rc}
 873 }
 874
 875 do_cifsmount ()
 876 {
 877         rc=1
 878
 879         if [ -x "/sbin/mount.cifs" ]
 880         then
 881                 if [ -z "${NFSOPTS}" ]
 882                 then
 883                         CIFSOPTS="-ouser=root,password="
 884                 else
 885                         CIFSOPTS="${NFSOPTS}"
 886                 fi
 887
 888                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 889                 modprobe -q cifs
 890
 891                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 892                 then
 893                         rc=0
 894                 fi
 895         fi
 896
 897         return ${rc}
 898 }
 899
 900 do_snap_copy ()
 901 {
 902         fromdev="${1}"
 903         todir="${2}"
 904         snap_type="${3}"
 905         size=$(fs_size "${fromdev}" "" "used")
 906
 907         if [ -b "${fromdev}" ]
 908         then
 909                 # look for free mem
 910                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 911                 then
 912                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
 913                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
 914                 else
 915                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( awk '/\<Cached/{print $2}' /proc/meminfo))
 916                 fi
 917
 918                 tomount="/mnt/tmpsnap"
 919
 920                 if [ ! -d "${tomount}" ]
 921                 then
 922                         mkdir -p "${tomount}"
 923                 fi
 924
 925                 fstype=$(get_fstype "${fromdev}")
 926
 927                 if [ -n "${fstype}" ]
 928                 then
 929                         # Copying stuff...
 930                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
 931                         cp -a "${tomount}"/* ${todir}
 932                         umount "${tomount}"
 933                 else
 934                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 935                 fi
 936
 937                 rmdir "${tomount}"
 938
 939                 if echo ${fromdev} | grep -qs loop
 940                 then
 941                         losetup -d "${fromdev}"
 942                 fi
 943
 944                 return 0
 945         else
 946                 return 1
 947
 948                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 949         fi
 950 }
 951
 952 find_snap ()
 953 {
 954         # Look for ${snap_label}.* in block devices
 955         snap_label="${1}"
 956
 957         if [ "${PERSISTENT}" != "nofiles" ]
 958         then
 959                 # search for image files
 960                 snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.ext4 ${snap_label}.jffs2")
 961         fi
 962
 963         if [ -z "${snapdata}" ]
 964         then
 965                 snapdata=$(find_cow_device "${snap_label}")
 966         fi
 967         echo "${snapdata}"
 968 }
 969
 970 try_snap ()
 971 {
 972         # copy the contents of previously found snapshot to ${snap_mount}
 973         # and remember the device and filename for resync on exit in live-initramfs.init
 974
 975         snapdata="${1}"
 976         snap_mount="${2}"
 977         snap_type="${3}"
 978
 979         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
 980         then
 981                 log_success_msg "found snapshot: ${snapdata}"
 982                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 983                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 984                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 985
 986                 RES=""
 987                 if ! try_mount "${snapdev}" "${snapback}" "ro"
 988                 then
 989                         break
 990                 fi
 991
 992                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
 993                 then
 994                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
 995                         dev=$(get_backing_device "${snapback}/${snapfile}")
 996
 997                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 998                         RES=$?
 999                 else
1000                         # cpio.gz snapshot
1001                         cd "${snap_mount}"
1002                         zcat "${snapback}/${snapfile}" | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories > /dev/null 2>&1
1003                         RES=$?
1004                         if [ "${RES}" != "0" ]
1005                         then
1006                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories\""
1007                         fi
1008                         cd "${OLDPWD}"
1009                 fi
1010
1011                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
1012
1013                 if [ "${RES}" != "0" ]
1014                 then
1015                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
1016                 fi
1017
1018         elif [ -b "${snapdata}" ]
1019         then
1020                 # Try to find if it could be a snapshot partition
1021                 dev="${snapdata}"
1022                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
1023                 if echo "${dev}" | grep -qs loop
1024                 then
1025                         # strange things happens, user confused?
1026                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
1027                         snapfile=$(basename ${snaploop})
1028                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
1029                 else
1030                         snapdev="${dev}"
1031                 fi
1032
1033                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1034                 then
1035                         log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1036                         return 1
1037                 else
1038                         if [ -n "${snapfile}" ]
1039                         then
1040                                 # it was a loop device, user confused
1041                                 umount ${snapdev}
1042                         fi
1043                 fi
1044         else
1045                 log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1046                 return 1
1047         fi
1048
1049         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
1050         return 0
1051 }
1052
1053 setup_unionfs ()
1054 {
1055         image_directory="${1}"
1056         rootmnt="${2}"
1057         addimage_directory="${3}"
1058         modprobe -q -b ${UNIONTYPE}
1059
1060         # run-init can't deal with images in a subdir, but we're going to
1061         # move all of these away before it runs anyway.  No, we're not,
1062         # put them in / since move-mounting them into / breaks mono and
1063         # some other apps.
1064
1065         croot="/"
1066
1067         # Let's just mount the read-only file systems first
1068         rofsstring=""
1069         rofslist=""
1070         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
1071
1072         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
1073         then
1074                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
1075                 roopt="nfsro"
1076         elif [ "${UNIONTYPE}" = "aufs" ]
1077         then
1078                 roopt="rr"
1079         else
1080                 roopt="ro"
1081         fi
1082
1083         if [ -z "${PLAIN_ROOT}" ]
1084         then
1085                 # Read image names from ${MODULE}.module if it exists
1086                 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1087                 then
1088                         for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1089                         do
1090                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1091                         done
1092                 elif [ -e "${image_directory}/${MODULE}.module" ]
1093                 then
1094                         for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1095                         do
1096                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1097                         done
1098                 else
1099                         # ${MODULE}.module does not exist, create a list of images
1100                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1101                         do
1102                                 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1103                                 do
1104                                         if [ -e "${IMAGE}" ]
1105                                         then
1106                                                 image_string="${image_string} ${IMAGE}"
1107                                         fi
1108                                 done
1109                         done
1110
1111                         if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1112                         then
1113                                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1114                                 do
1115                                         for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1116                                         do
1117                                                 if [ -e "${IMAGE}" ]
1118                                                 then
1119                                                         image_string="${image_string} ${IMAGE}"
1120                                                 fi
1121                                         done
1122                                 done
1123                         fi
1124
1125                         # Now sort the list
1126                         image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1127                 fi
1128
1129         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1130
1131                 mkdir -p "${croot}"
1132
1133                 for image in ${image_string}
1134                 do
1135                         imagename=$(basename "${image}")
1136
1137                         export image devname
1138                         maybe_break live-realpremount
1139                         log_begin_msg "Running /scripts/live-realpremount"
1140                         run_scripts /scripts/live-realpremount
1141                         log_end_msg
1142
1143                         if [ -d "${image}" ]
1144                         then
1145                                 # it is a plain directory: do nothing
1146                                 rofsstring="${image}=${roopt}:${rofsstring}"
1147                                 rofslist="${image} ${rofslist}"
1148                         elif [ -f "${image}" ]
1149                         then
1150                                 if losetup --help 2>&1 | grep -q -- "-r\b"
1151                                 then
1152                                         backdev=$(get_backing_device "${image}" "-r")
1153                                 else
1154                                         backdev=$(get_backing_device "${image}")
1155                                 fi
1156                                 fstype=$(get_fstype "${backdev}")
1157
1158                                 if [ "${fstype}" = "unknown" ]
1159                                 then
1160                                         panic "Unknown file system type on ${backdev} (${image})"
1161                                 fi
1162
1163                                 if [ -z "${fstype}" ]
1164                                 then
1165                                         fstype="${imagename##*.}"
1166                                         log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1167                                 fi
1168
1169                                 mkdir -p "${croot}/${imagename}"
1170                                 log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
1171                                 mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
1172                                 log_end_msg
1173                         fi
1174                 done
1175         else
1176                 # we have a plain root system
1177                 mkdir -p "${croot}/filesystem"
1178                 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
1179                 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}"
1180                 # probably broken:
1181                 mount -o bind ${croot}/filesystem $mountpoint
1182                 log_end_msg
1183         fi
1184
1185         rofsstring=${rofsstring%:}
1186
1187         mkdir -p /cow
1188
1189         # Looking for "${root_persistence}" device or file
1190         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1191         then
1192                 # Load USB modules
1193                 num_block=$(ls -l /sys/block | wc -l)
1194                 for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1195                 do
1196                         modprobe -q -b ${module}
1197                 done
1198
1199                 if [ -x /sbin/udevadm ]
1200                 then
1201                         # lenny
1202                         udevadm trigger
1203                         udevadm settle
1204                 else
1205                         # etch
1206                         udevtrigger
1207                         udevsettle
1208                 fi
1209
1210                 # For some reason, udevsettle does not block in this scenario,
1211                 # so we sleep for a little while.
1212                 #
1213                 # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1214                 for timeout in 5 4 3 2 1
1215                 do
1216                         sleep 1
1217
1218                         if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1219                         then
1220                                 break
1221                         fi
1222                 done
1223
1224                 # search for label and files (this could be hugely optimized)
1225                 cowprobe=$(find_cow_device "${root_persistence}")
1226                 if [ -b "${cowprobe}" ]
1227                 then
1228                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1229                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1230                         # snapshots to be sure to really store some e.g key config files,
1231                         # but not on the same media
1232                         blacklistdev="${cowprobe}"
1233                         PERSISTENCE_IS_ON="1"
1234                         export PERSISTENCE_IS_ON
1235                 fi
1236                 # homecow just mount something on /home, this should be generalized some way
1237                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1238                 if [ -b "${homecow}" ]
1239                 then
1240                         PERSISTENCE_IS_ON="1"
1241                         export PERSISTENCE_IS_ON
1242                 fi
1243                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1244                 # This second type should be removed when snapshot will get smarter,
1245                 # hence when "/etc/live-snapshot*list" will be supported also by
1246                 # ext2|ext3|ext4|jffs2 snapshot types.
1247                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1248
1249                 if [ -b "${cowprobe}" ]
1250                 then
1251                         cowdevice=${cowprobe}
1252                         cow_fstype=$(get_fstype "${cowprobe}")
1253                         cow_mountopt="rw,noatime"
1254
1255                         if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
1256                         then
1257                                 fsck -y ${cowdevice}
1258                         fi
1259                 else
1260                         log_warning_msg "Unable to find the persistent medium"
1261                         cowdevice="tmpfs"
1262                         cow_fstype="tmpfs"
1263                         cow_mountopt="rw,noatime,mode=755"
1264                 fi
1265         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1266         then
1267                 # check if there are any nfs options
1268                 if echo ${NFS_COW}|grep -q ','
1269                 then
1270                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1271                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1272                 else
1273                         nfs_cow_opts="-o nolock"
1274                         nfs_cow=${NFS_COW}
1275                 fi
1276                 mac="$(get_mac)"
1277                 if [ -n "${mac}" ]
1278                 then
1279                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1280                         cow_fstype="nfs"
1281                 else
1282                         panic "unable to determine mac address"
1283                 fi
1284         else
1285                 cowdevice="tmpfs"
1286                 cow_fstype="tmpfs"
1287                 cow_mountopt="rw,noatime,mode=755"
1288         fi
1289
1290         if [ "${cow_fstype}" = "nfs" ]
1291         then
1292                 log_begin_msg \
1293                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1294                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1295                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1296         else
1297                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1298                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1299         fi
1300
1301         rofscount=$(echo ${rofslist} |wc -w)
1302
1303         if [ -n "${EXPOSED_ROOT}" ]
1304         then
1305                 if [ ${rofscount} -ne 1 ]
1306                 then
1307                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1308                 fi
1309                 exposedrootfs=${rofslist%% }
1310
1311                 mount --bind ${exposedrootfs} ${rootmnt} || \
1312                         panic "bind mount of ${exposedrootfs} failed"
1313
1314                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1315                 then
1316                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1317                 else
1318                         cow_dirs=''
1319                 fi
1320
1321                 for dir in ${cow_dirs}; do
1322                         mkdir -p /cow${dir}
1323                         mount -t ${UNIONTYPE} \
1324                                 -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
1325                                 ${UNIONTYPE} "${rootmnt}${dir}" || \
1326                                 panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
1327                                         rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1328                 done
1329         else
1330                 mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
1331                         ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
1332                         ${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
1333         fi
1334
1335         # Correct the permissions of /:
1336         chmod 0755 "${rootmnt}"
1337
1338         # tmpfs file systems
1339         touch /etc/fstab
1340         mkdir -p "${rootmnt}/live"
1341         mount -t tmpfs tmpfs ${rootmnt}/live
1342
1343         # Adding other custom mounts
1344         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1345         then
1346                 # directly mount /home
1347                 # FIXME: add a custom mounts configurable system
1348
1349                 if [ -b "${homecow}" ]
1350                 then
1351                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1352                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1353                 else
1354                         log_warning_msg "Unable to find the persistent home medium"
1355                 fi
1356
1357                 # Look for other snapshots to copy in
1358                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1359                 # This second type should be removed when snapshot grow smarter
1360                 try_snap "${home_snapdata}" "${rootmnt}/home" "HOME"
1361         fi
1362
1363         if [ -n "${SHOWMOUNTS}" ]
1364         then
1365                 for d in ${rofslist}
1366                 do
1367                         mkdir -p "${rootmnt}/live/${d##*/}"
1368
1369                         case d in
1370                                 *.dir)
1371                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1372                                         ;;
1373
1374                                 *)
1375                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1376                                         ;;
1377                         esac
1378                 done
1379         fi
1380
1381         # shows cow fs on /cow for use by live-snapshot
1382         mkdir -p "${rootmnt}/live/cow"
1383         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 ${rootmnt}/live/cow"
1384 }
1385
1386 check_dev ()
1387 {
1388         sysdev="${1}"
1389         devname="${2}"
1390         skip_uuid_check="${3}"
1391
1392         # support for fromiso=.../isofrom=....
1393         if [ -n "$FROMISO" ]
1394         then
1395                 mkdir /isofrom
1396                 ISO_DEVICE="$(echo $FROMISO | sed 's|\(/dev/[a-z]*[0-9]*\).*|\1|')"
1397                 mount "$ISO_DEVICE" /isofrom
1398                 ISO_NAME="$(echo $FROMISO | sed 's|/dev/[a-z]*[0-9]*/||')"
1399                 loopdevname=$(setup_loop "/isofrom/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
1400                 devname="${loopdevname}"
1401         fi
1402
1403         if [ -z "${devname}" ]
1404         then
1405                 devname=$(sys2dev "${sysdev}")
1406         fi
1407
1408         if [ -d "${devname}" ]
1409         then
1410                 mount -o bind "${devname}" $mountpoint || continue
1411
1412                 if is_live_path $mountpoint
1413                 then
1414                         echo $mountpoint
1415                         return 0
1416                 else
1417                         umount $mountpoint
1418                 fi
1419         fi
1420
1421         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1422         then
1423                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1424                 devname="${loopdevname}"
1425         fi
1426
1427         fstype=$(get_fstype "${devname}")
1428
1429         if is_supported_fs ${fstype}
1430         then
1431                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1432
1433                 if is_live_path ${mountpoint} && \
1434                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1435                 then
1436                         echo ${mountpoint}
1437                         return 0
1438                 else
1439                         umount ${mountpoint}
1440                 fi
1441         fi
1442
1443         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1444         then
1445                 losetup -d "${loopdevname}"
1446         fi
1447
1448         return 1
1449 }
1450
1451 find_livefs ()
1452 {
1453         timeout="${1}"
1454
1455         # don't start autodetection before timeout has expired
1456         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1457         then
1458                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1459                 then
1460                         return 1
1461                 fi
1462         fi
1463
1464         # first look at the one specified in the command line
1465         case "${LIVE_MEDIA}" in
1466                 removable-usb)
1467                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1468                         do
1469                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1470                                 then
1471                                         if readlink ${sysblock} | grep -q usb ||
1472                                            readlink ${sysblock}/device | grep -q usb # linux < 2.6.29
1473                                         then
1474                                                 for dev in $(subdevices "${sysblock}")
1475                                                 do
1476                                                         if check_dev "${dev}"
1477                                                         then
1478                                                                 return 0
1479                                                         fi
1480                                                 done
1481                                         fi
1482                                 fi
1483                         done
1484                         ;;
1485
1486                 removable)
1487                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1488                         do
1489                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1490                                 then
1491                                         for dev in $(subdevices "${sysblock}")
1492                                         do
1493                                                 if check_dev "${dev}"
1494                                                 then
1495                                                         return 0
1496                                                 fi
1497                                         done
1498                                 fi
1499                         done
1500                         ;;
1501
1502                 *)
1503                         if [ ! -z "${LIVE_MEDIA}" ]
1504                         then
1505                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1506                                 then
1507                                         return 0
1508                                 fi
1509                         fi
1510                         ;;
1511         esac
1512
1513         # or do the scan of block devices
1514         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1515         do
1516                 devname=$(sys2dev "${sysblock}")
1517                 fstype=$(get_fstype "${devname}")
1518
1519                 if /lib/udev/cdrom_id ${devname} > /dev/null
1520                 then
1521                         if check_dev "null" "${devname}"
1522                         then
1523                                 return 0
1524                         fi
1525                 elif is_nice_device "${sysblock}"
1526                 then
1527                         for dev in $(subdevices "${sysblock}")
1528                         do
1529                                 if check_dev "${dev}"
1530                                 then
1531                                         return 0
1532                                 fi
1533                         done
1534                 elif [ "${fstype}" = "squashfs" -o \
1535                         "${fstype}" = "ext2" -o \
1536                         "${fstype}" = "ext3" -o \
1537                         "${fstype}" = "ext4" -o \
1538                         "${fstype}" = "jffs2" ]
1539                 then
1540                         # This is an ugly hack situation, the block device has
1541                         # an image directly on it.  It's hopefully
1542                         # live-initramfs, so take it and run with it.
1543                         ln -s "${devname}" "${devname}.${fstype}"
1544                         echo "${devname}.${fstype}"
1545                         return 0
1546                 fi
1547         done
1548
1549         return 1
1550 }
1551
1552 set_usplash_timeout ()
1553 {
1554         if [ -x /sbin/usplash_write ]
1555         then
1556                 /sbin/usplash_write "TIMEOUT 120"
1557         else if [ -x /sbin/splashy_update ] ; then
1558                 /sbin/splashy_update "TIMEOUT 120"
1559         fi ; fi
1560 }
1561
1562 integrity_check ()
1563 {
1564         media_mountpoint="${1}"
1565
1566         log_begin_msg "Checking media integrity"
1567
1568         cd ${media_mountpoint}
1569         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1570         RC="${?}"
1571
1572         log_end_msg
1573
1574         if [ "${RC}" -eq 0 ]
1575         then
1576                 log_success_msg "Everything ok, will reboot in 10 seconds."
1577                 sleep 10
1578                 cd /
1579                 umount ${media_mountpoint}
1580                 sync
1581                 echo u > /proc/sysrq-trigger
1582                 echo b > /proc/sysrq-trigger
1583         else
1584                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1585         fi
1586 }
1587
1588 mountroot ()
1589 {
1590         if [ -x /scripts/local-top/cryptroot ]; then
1591             /scripts/local-top/cryptroot
1592         fi
1593
1594         exec 6>&1
1595         exec 7>&2
1596         exec > live.log
1597         exec 2>&1
1598         tail -f live.log >&7 &
1599         tailpid="${!}"
1600
1601         # Ensure 'panic' function is overridden
1602         . /scripts/live-functions
1603
1604         Arguments
1605
1606         set_usplash_timeout
1607
1608         maybe_break live-premount
1609         log_begin_msg "Running /scripts/live-premount"
1610         run_scripts /scripts/live-premount
1611         log_end_msg
1612
1613         # Needed here too because some things (*cough* udev *cough*)
1614         # changes the timeout
1615
1616         set_usplash_timeout
1617
1618         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1619         then
1620                 if do_netmount
1621                 then
1622                         livefs_root="${mountpoint}"
1623                 else
1624                         panic "Unable to find a live file system on the network"
1625                 fi
1626         else
1627                 if [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1628                 then
1629                         # Do a local boot from hd
1630                         livefs_root=${ROOT}
1631                 else
1632                         # Scan local devices for the image
1633                         i=0
1634                         while [ "$i" -lt 60 ]
1635                         do
1636                                 livefs_root=$(find_livefs ${i})
1637
1638                                 if [ -n "${livefs_root}" ]
1639                                 then
1640                                         break
1641                                 fi
1642
1643                                 sleep 1
1644                                 i="$(($i + 1))"
1645                         done
1646                 fi
1647         fi
1648
1649         if [ -z "${livefs_root}" ]
1650         then
1651                 panic "Unable to find a medium containing a live file system"
1652         fi
1653
1654         if [ "${INTEGRITY_CHECK}" ]
1655         then
1656                 integrity_check "${livefs_root}"
1657         fi
1658
1659         if [ "${TORAM}" ]
1660         then
1661                 live_dest="ram"
1662         elif [ "${TODISK}" ]
1663         then
1664                 live_dest="${TODISK}"
1665         fi
1666
1667         if [ "${live_dest}" ]
1668         then
1669                 log_begin_msg "Copying live media to ${live_dest}"
1670                 copy_live_to "${livefs_root}" "${live_dest}"
1671                 log_end_msg
1672         fi
1673
1674         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
1675         # because the mountpoint is left behind in /proc/mounts, so let's get
1676         # rid of it when running from RAM
1677         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
1678         then
1679           losetup -d /dev/loop0
1680           grep -q /isofrom /proc/mounts && umount /isofrom
1681         fi
1682
1683         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
1684         then
1685                 setup_unionfs "${livefs_root}" "${rootmnt}"
1686         else
1687                 mac="$(get_mac)"
1688                 mac="$(echo ${mac} | sed 's/-//g')"
1689                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1690         fi
1691
1692         log_end_msg
1693
1694         maybe_break live-bottom
1695         log_begin_msg "Running /scripts/live-bottom\n"
1696
1697         run_scripts /scripts/live-bottom
1698         log_end_msg
1699
1700         exec 1>&6 6>&-
1701         exec 2>&7 7>&-
1702         kill ${tailpid}
1703         [ -w "${rootmnt}/var/log/" ] && cp live.log "${rootmnt}/var/log/" 2>/dev/null
1704 }