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                         silent)
 395                                 SILENT="Yes"
 396                                 export SILENT
 397                                 ;;
 398
 399                         textonly)
 400                                 TEXTONLY="Yes"
 401                                 export TEXTONLY
 402                                 ;;
 403
 404                         timezone=*)
 405                                 TIMEZONE="${ARGUMENT#timezone=}"
 406                                 export TIMEZONE
 407                                 ;;
 408
 409                         notimezone)
 410                                 NOTIMEZONE="Yes"
 411                                 export NOTIMEZONE
 412                                 ;;
 413
 414                         todisk=*)
 415                                 TODISK="${ARGUMENT#todisk=}"
 416                                 export TODISK
 417                                 ;;
 418
 419                         toram)
 420                                 TORAM="Yes"
 421                                 export TORAM
 422                                 ;;
 423
 424                         toram=*)
 425                                 TORAM="Yes"
 426                                 MODULETORAM="${ARGUMENT#toram=}"
 427                                 export TORAM MODULETORAM
 428                                 ;;
 429
 430                         exposedroot)
 431                                 EXPOSED_ROOT="Yes"
 432                                 export EXPOSED_ROOT
 433                                 ;;
 434
 435                         plainroot)
 436                                 PLAIN_ROOT="Yes"
 437                                 export PLAIN_ROOT
 438                                 ;;
 439
 440                         skipunion)
 441                                 SKIP_UNION_MOUNTS="Yes"
 442                                 export SKIP_UNION_MOUNTS
 443                                 ;;
 444
 445                         root=*)
 446                                 ROOT="${ARGUMENT#root=}"
 447                                 export ROOT
 448                                 ;;
 449
 450                         union=*)
 451                                 UNIONTYPE="${ARGUMENT#union=}"
 452                                 export UNIONTYPE
 453                                 ;;
 454
 455                         utc=*)
 456                                 UTC="${ARGUMENT#utc=}"
 457                                 export UTC
 458                                 ;;
 459
 460                         xdebconf)
 461                                 XDEBCONF="Yes"
 462                                 export XDEBCONF
 463                                 ;;
 464
 465                         xdriver=*)
 466                                 XDRIVER="${ARGUMENT#xdriver=}"
 467                                 export XDRIVER
 468                                 ;;
 469
 470                         xvideomode=*)
 471                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 472                                 export XVIDEOMODE
 473                                 ;;
 474                 esac
 475         done
 476
 477         # sort of compatibility with netboot.h from linux docs
 478         if [ -z "${NETBOOT}" ]
 479         then
 480                 if [ "${ROOT}" = "/dev/nfs" ]
 481                 then
 482                         NETBOOT="nfs"
 483                         export NETBOOT
 484                 elif [ "${ROOT}" = "/dev/cifs" ]
 485                 then
 486                         NETBOOT="cifs"
 487                         export NETBOOT
 488                 fi
 489         fi
 490
 491         if [ -z "${MODULE}" ]
 492         then
 493                 MODULE="filesystem"
 494                 export MODULE
 495         fi
 496
 497         if [ -z "${UNIONTYPE}" ]
 498         then
 499                 UNIONTYPE="aufs"
 500                 export UNIONTYPE
 501         fi
 502 }
 503
 504 is_live_path ()
 505 {
 506         DIRECTORY="${1}"
 507
 508         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 509         then
 510                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
 511                 do
 512                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 513                         then
 514                                 return 0
 515                         fi
 516                 done
 517         fi
 518
 519         return 1
 520 }
 521
 522 matches_uuid ()
 523 {
 524         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 525         then
 526                 return 0
 527         fi
 528
 529         path="${1}"
 530         uuid="$(cat /conf/uuid.conf)"
 531
 532         for try_uuid_file in "${path}/.disk/live-uuid"*
 533         do
 534                 [ -e "${try_uuid_file}" ] || continue
 535
 536                 try_uuid="$(cat "${try_uuid_file}")"
 537
 538                 if [ "${uuid}" = "${try_uuid}" ]
 539                 then
 540                         return 0
 541                 fi
 542         done
 543
 544         return 1
 545 }
 546
 547 get_backing_device ()
 548 {
 549         case "${1}" in
 550                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 551                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 552                         ;;
 553
 554                 *.dir)
 555                         echo "directory"
 556                         ;;
 557
 558                 *)
 559                         panic "Unrecognized live filesystem: ${1}"
 560                         ;;
 561         esac
 562 }
 563
 564 match_files_in_dir ()
 565 {
 566         # Does any files match pattern ${1} ?
 567         local pattern="${1}"
 568
 569         if [ "$(echo ${pattern})" != "${pattern}" ]
 570         then
 571                 return 0
 572         fi
 573
 574         return 1
 575 }
 576
 577 mount_images_in_directory ()
 578 {
 579         directory="${1}"
 580         rootmnt="${2}"
 581         mac="${3}"
 582
 583
 584         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 585                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 586                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 587                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 588                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 589                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 590         then
 591                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 592                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 593         else
 594                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 595         fi
 596 }
 597
 598 is_nice_device ()
 599 {
 600         sysfs_path="${1#/sys}"
 601
 602         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-(ide|scsi|usb))"
 603         then
 604                 return 0
 605         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 606         then
 607                 return 0
 608         fi
 609
 610         return 1
 611 }
 612
 613 copy_live_to ()
 614 {
 615         copyfrom="${1}"
 616         copytodev="${2}"
 617         copyto="${copyfrom}_swap"
 618
 619         if [ -z "${MODULETORAM}" ]
 620         then
 621                 size=$(fs_size "" ${copyfrom} "used")
 622         else
 623                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 624
 625                 if [ -f "${MODULETORAMFILE}" ]
 626                 then
 627                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 628                 else
 629                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 630                         return 1
 631                 fi
 632         fi
 633
 634         if [ "${copytodev}" = "ram" ]
 635         then
 636                 # copying to ram:
 637                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( awk '/\<Cached/{print $2}' /proc/meminfo ) )
 638                 mount_options="-o size=${size}k"
 639                 free_string="memory"
 640                 fstype="tmpfs"
 641                 dev="/dev/shm"
 642         else
 643                 # it should be a writable block device
 644                 if [ -b "${copytodev}" ]
 645                 then
 646                         dev="${copytodev}"
 647                         free_string="space"
 648                         fstype=$(get_fstype "${dev}")
 649                         freespace=$(fs_size "${dev}")
 650                 else
 651                         log_warning_msg "${copytodev} is not a block device."
 652                         return 1
 653                 fi
 654         fi
 655
 656         if [ "${freespace}" -lt "${size}" ]
 657         then
 658                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 659                 return 1
 660         fi
 661
 662         # begin copying (or uncompressing)
 663         mkdir "${copyto}"
 664         echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 665         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 666
 667         if [ "${extension}" = "tgz" ]
 668         then
 669                 cd "${copyto}"
 670                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 671                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 672                 mount -r -o move "${copyto}" "${rootmnt}"
 673                 cd "${OLDPWD}"
 674         else
 675                 if [ -n "${MODULETORAMFILE}" ]
 676                 then
 677                         cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 678                 else
 679                         cp -a ${copyfrom}/* ${copyto}   # "cp -a" from busybox also copies hidden files
 680                 fi
 681
 682                 umount ${copyfrom}
 683                 mount -r -o move ${copyto} ${copyfrom}
 684         fi
 685
 686         rmdir ${copyto}
 687         return 0
 688 }
 689
 690 do_netmount ()
 691 {
 692         rc=1
 693
 694         modprobe -q af_packet # For DHCP
 695
 696         if [ -x /sbin/udevadm ]
 697         then
 698                 # lenny
 699                 udevadm trigger
 700                 udevadm settle
 701         else
 702                 # etch
 703                 udevtrigger
 704                 udevsettle
 705         fi
 706
 707         ipconfig ${DEVICE} | tee /netboot.config
 708
 709         # source relevant ipconfig output
 710         OLDHOSTNAME=${HOSTNAME}
 711         . /tmp/net-${DEVICE}.conf
 712         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 713         export HOSTNAME
 714
 715         # Check if we have a network device at all
 716         if ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 717            ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 718            ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 719            ! ls /sys/class/net/ra0 > /dev/null 2>&1
 720         then
 721                 panic "No supported network device found, maybe a non-mainline driver is required."
 722         fi
 723
 724         if [ "${NFSROOT}" = "auto" ]
 725         then
 726                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 727         fi
 728
 729         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] ) && do_httpmount
 730         then
 731                 rc=0
 732                 return ${rc}
 733         fi
 734
 735         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 736         then
 737                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 738         fi
 739
 740         log_begin_msg "Trying netboot from ${NFSROOT}"
 741
 742         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 743         then
 744                 rc=0
 745         elif do_nfsmount
 746         then
 747                 NETBOOT="nfs"
 748                 export NETBOOT
 749                 rc=0
 750         fi
 751
 752         log_end_msg
 753         return ${rc}
 754 }
 755
 756 do_httpmount ()
 757 {
 758         rc=1
 759         dest="${mountpoint}/${LIVE_MEDIA_PATH}"
 760         mount -t ramfs ram "${mountpoint}"
 761         mkdir -p "${dest}"
 762
 763         for webfile in HTTPFS FTPFS FETCH
 764         do
 765                 url="$(eval echo \"\$\{${webfile}\}\")"
 766                 extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
 767
 768                 if [ -n "$url" ]
 769                 then
 770                         case "${extension}" in
 771                                 squashfs|tgz|tar)
 772                                         if [ "${webfile}" = "FETCH" ]
 773                                         then
 774                                                 case "$url" in
 775                                                         tftp*)
 776                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
 777                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
 778                                                                 lfile="$(basename $url)"
 779                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
 780                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
 781                                                         ;;
 782
 783                                                         *)
 784                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
 785                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
 786                                                                 ;;
 787                                                 esac
 788                                         else
 789                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
 790                                                 if [ "${webfile}" = "FTPFS" ]
 791                                                 then
 792                                                         FUSE_MOUNT="curlftpfs"
 793                                                         url="$(dirname ${url})"
 794                                                 else
 795                                                         FUSE_MOUNT="httpfs"
 796                                                 fi
 797                                                 modprobe fuse
 798                                                 $FUSE_MOUNT "${url}" "${dest}"
 799                                         fi
 800                                         [ ${?} -eq 0 ] && rc=0
 801                                         [ "${extension}" = "tgz" ] && live_dest="ram"
 802                                         break
 803                                         ;;
 804
 805                                 *)
 806                                         log_begin_msg "Unrecognized archive extension for ${url}"
 807                                         ;;
 808                         esac
 809                 fi
 810         done
 811
 812         if [ ${rc} != 0 ]
 813         then
 814             umount "${mountpoint}"
 815         fi
 816
 817         return ${rc}
 818 }
 819
 820 do_nfsmount ()
 821 {
 822         rc=1
 823
 824         modprobe -q nfs
 825
 826         if [ -z "${NFSOPTS}" ]
 827         then
 828                 NFSOPTS=""
 829         fi
 830
 831         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 832
 833         # FIXME: This while loop is an ugly HACK round an nfs bug
 834         i=0
 835         while [ "$i" -lt 60 ]
 836         do
 837                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 838                 sleep 1
 839                 i="$(($i + 1))"
 840         done
 841
 842         return ${rc}
 843 }
 844
 845 do_cifsmount ()
 846 {
 847         rc=1
 848
 849         if [ -x "/sbin/mount.cifs" ]
 850         then
 851                 if [ -z "${NFSOPTS}" ]
 852                 then
 853                         CIFSOPTS="-ouser=root,password="
 854                 else
 855                         CIFSOPTS="${NFSOPTS}"
 856                 fi
 857
 858                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 859                 modprobe -q cifs
 860
 861                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 862                 then
 863                         rc=0
 864                 fi
 865         fi
 866
 867         return ${rc}
 868 }
 869
 870 do_snap_copy ()
 871 {
 872         fromdev="${1}"
 873         todir="${2}"
 874         snap_type="${3}"
 875         size=$(fs_size "${fromdev}" "" "used")
 876
 877         if [ -b "${fromdev}" ]
 878         then
 879                 # look for free mem
 880                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 881                 then
 882                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
 883                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
 884                 else
 885                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( awk '/\<Cached/{print $2}' /proc/meminfo))
 886                 fi
 887
 888                 tomount="/mnt/tmpsnap"
 889
 890                 if [ ! -d "${tomount}" ]
 891                 then
 892                         mkdir -p "${tomount}"
 893                 fi
 894
 895                 fstype=$(get_fstype "${fromdev}")
 896
 897                 if [ -n "${fstype}" ]
 898                 then
 899                         # Copying stuff...
 900                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
 901                         cp -a "${tomount}"/* ${todir}
 902                         umount "${tomount}"
 903                 else
 904                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 905                 fi
 906
 907                 rmdir "${tomount}"
 908
 909                 if echo ${fromdev} | grep -qs loop
 910                 then
 911                         losetup -d "${fromdev}"
 912                 fi
 913
 914                 return 0
 915         else
 916                 return 1
 917
 918                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 919         fi
 920 }
 921
 922 find_snap ()
 923 {
 924         # Look for ${snap_label}.* in block devices
 925         snap_label="${1}"
 926
 927         if [ "${PERSISTENT}" != "nofiles" ]
 928         then
 929                 # search for image files
 930                 snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.ext4 ${snap_label}.jffs2")
 931         fi
 932
 933         if [ -z "${snapdata}" ]
 934         then
 935                 snapdata=$(find_cow_device "${snap_label}")
 936         fi
 937         echo "${snapdata}"
 938 }
 939
 940 try_snap ()
 941 {
 942         # copy the contents of previously found snapshot to ${snap_mount}
 943         # and remember the device and filename for resync on exit in live-initramfs.init
 944
 945         snapdata="${1}"
 946         snap_mount="${2}"
 947         snap_type="${3}"
 948
 949         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
 950         then
 951                 log_success_msg "found snapshot: ${snapdata}"
 952                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 953                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 954                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 955
 956                 RES=""
 957                 if ! try_mount "${snapdev}" "${snapback}" "ro"
 958                 then
 959                         break
 960                 fi
 961
 962                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
 963                 then
 964                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
 965                         dev=$(get_backing_device "${snapback}/${snapfile}")
 966
 967                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 968                         RES=$?
 969                 else
 970                         # cpio.gz snapshot
 971                         cd "${snap_mount}"
 972                         zcat "${snapback}/${snapfile}" | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories > /dev/null 2>&1
 973                         RES=$?
 974                         if [ "${RES}" != "0" ]
 975                         then
 976                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | /bin/cpio --extract --preserve-modification-time --no-absolute-filenames --sparse --unconditional --make-directories\""
 977                         fi
 978                         cd "${OLDPWD}"
 979                 fi
 980
 981                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
 982
 983                 if [ "${RES}" != "0" ]
 984                 then
 985                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
 986                 fi
 987
 988         elif [ -b "${snapdata}" ]
 989         then
 990                 # Try to find if it could be a snapshot partition
 991                 dev="${snapdata}"
 992                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
 993                 if echo "${dev}" | grep -qs loop
 994                 then
 995                         # strange things happens, user confused?
 996                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 997                         snapfile=$(basename ${snaploop})
 998                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
 999                 else
1000                         snapdev="${dev}"
1001                 fi
1002
1003                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1004                 then
1005                         log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1006                         return 1
1007                 else
1008                         if [ -n "${snapfile}" ]
1009                         then
1010                                 # it was a loop device, user confused
1011                                 umount ${snapdev}
1012                         fi
1013                 fi
1014         else
1015                 log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1016                 return 1
1017         fi
1018
1019         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
1020         return 0
1021 }
1022
1023 setup_unionfs ()
1024 {
1025         image_directory="${1}"
1026         rootmnt="${2}"
1027         addimage_directory="${3}"
1028         modprobe -q -b ${UNIONTYPE}
1029
1030         # run-init can't deal with images in a subdir, but we're going to
1031         # move all of these away before it runs anyway.  No, we're not,
1032         # put them in / since move-mounting them into / breaks mono and
1033         # some other apps.
1034
1035         croot="/"
1036
1037         # Let's just mount the read-only file systems first
1038         rofsstring=""
1039         rofslist=""
1040         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
1041
1042         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
1043         then
1044                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
1045                 roopt="nfsro"
1046         elif [ "${UNIONTYPE}" = "aufs" ]
1047         then
1048                 roopt="rr"
1049         else
1050                 roopt="ro"
1051         fi
1052
1053         # Read image names from ${MODULE}.module if it exists
1054         if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1055         then
1056                 for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1057                 do
1058                         image_string="${image_string} ${image_directory}/${IMAGE}"
1059                 done
1060         elif [ -e "${image_directory}/${MODULE}.module" ]
1061         then
1062                 for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1063                 do
1064                         image_string="${image_string} ${image_directory}/${IMAGE}"
1065                 done
1066         else
1067                 # ${MODULE}.module does not exist, create a list of images
1068                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1069                 do
1070                         for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1071                         do
1072                                 if [ -e "${IMAGE}" ]
1073                                 then
1074                                         image_string="${image_string} ${IMAGE}"
1075                                 fi
1076                         done
1077                 done
1078
1079                 if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1080                 then
1081                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1082                         do
1083                                 for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1084                                 do
1085                                         if [ -e "${IMAGE}" ]
1086                                         then
1087                                                 image_string="${image_string} ${IMAGE}"
1088                                         fi
1089                                 done
1090                         done
1091                 fi
1092
1093                 # Now sort the list
1094                 image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1095         fi
1096
1097         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1098
1099         mkdir -p "${croot}"
1100
1101         for image in ${image_string}
1102         do
1103                 imagename=$(basename "${image}")
1104
1105                 export image devname
1106                 maybe_break live-realpremount
1107                 log_begin_msg "Running /scripts/live-realpremount"
1108                 run_scripts /scripts/live-realpremount
1109                 log_end_msg
1110
1111                 if [ -d "${image}" ]
1112                 then
1113                         # it is a plain directory: do nothing
1114                         rofsstring="${image}=${roopt}:${rofsstring}"
1115                         rofslist="${image} ${rofslist}"
1116                 elif [ -f "${image}" ]
1117                 then
1118                         if losetup --help 2>&1 | grep -q -- "-r\b"
1119                         then
1120                                 backdev=$(get_backing_device "${image}" "-r")
1121                         else
1122                                 backdev=$(get_backing_device "${image}")
1123                         fi
1124                         fstype=$(get_fstype "${backdev}")
1125
1126                         if [ "${fstype}" = "unknown" ]
1127                         then
1128                                 panic "Unknown file system type on ${backdev} (${image})"
1129                         fi
1130
1131                         if [ -z "${fstype}" ]
1132                         then
1133                                 fstype="${imagename##*.}"
1134                                 log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1135                         fi
1136
1137                         mkdir -p "${croot}/${imagename}"
1138                         log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
1139                         mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
1140                         log_end_msg
1141                 fi
1142         done
1143
1144         rofsstring=${rofsstring%:}
1145
1146         mkdir -p /cow
1147
1148         # Looking for "${root_persistence}" device or file
1149         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1150         then
1151                 # Load USB modules
1152                 num_block=$(ls -l /sys/block | wc -l)
1153                 for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1154                 do
1155                         modprobe -q -b ${module}
1156                 done
1157
1158                 if [ -x /sbin/udevadm ]
1159                 then
1160                         # lenny
1161                         udevadm trigger
1162                         udevadm settle
1163                 else
1164                         # etch
1165                         udevtrigger
1166                         udevsettle
1167                 fi
1168
1169                 # For some reason, udevsettle does not block in this scenario,
1170                 # so we sleep for a little while.
1171                 #
1172                 # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1173                 for timeout in 5 4 3 2 1
1174                 do
1175                         sleep 1
1176
1177                         if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1178                         then
1179                                 break
1180                         fi
1181                 done
1182
1183                 # search for label and files (this could be hugely optimized)
1184                 cowprobe=$(find_cow_device "${root_persistence}")
1185                 if [ -b "${cowprobe}" ]
1186                 then
1187                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1188                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1189                         # snapshots to be sure to really store some e.g key config files,
1190                         # but not on the same media
1191                         blacklistdev="${cowprobe}"
1192                         PERSISTENCE_IS_ON="1"
1193                         export PERSISTENCE_IS_ON
1194                 fi
1195                 # homecow just mount something on /home, this should be generalized some way
1196                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1197                 if [ -b "${homecow}" ]
1198                 then
1199                         PERSISTENCE_IS_ON="1"
1200                         export PERSISTENCE_IS_ON
1201                 fi
1202                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1203                 # This second type should be removed when snapshot will get smarter,
1204                 # hence when "/etc/live-snapshot*list" will be supported also by
1205                 # ext2|ext3|ext4|jffs2 snapshot types.
1206                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1207
1208                 if [ -b "${cowprobe}" ]
1209                 then
1210                         cowdevice=${cowprobe}
1211                         cow_fstype=$(get_fstype "${cowprobe}")
1212                         cow_mountopt="rw,noatime"
1213                 else
1214                         log_warning_msg "Unable to find the persistent medium"
1215                         cowdevice="tmpfs"
1216                         cow_fstype="tmpfs"
1217                         cow_mountopt="rw,noatime,mode=755"
1218                 fi
1219         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1220         then
1221                 # check if there are any nfs options
1222                 if echo ${NFS_COW}|grep -q ','
1223                 then
1224                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1225                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1226                 else
1227                         nfs_cow_opts="-o nolock"
1228                         nfs_cow=${NFS_COW}
1229                 fi
1230                 mac="$(get_mac)"
1231                 if [ -n "${mac}" ]
1232                 then
1233                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1234                         cow_fstype="nfs"
1235                 else
1236                         panic "unable to determine mac address"
1237                 fi
1238         else
1239                 cowdevice="tmpfs"
1240                 cow_fstype="tmpfs"
1241                 cow_mountopt="rw,noatime,mode=755"
1242         fi
1243
1244         if [ "${cow_fstype}" = "nfs" ]
1245         then
1246                 log_begin_msg \
1247                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1248                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1249                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1250         else
1251                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1252                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1253         fi
1254
1255         rofscount=$(echo ${rofslist} |wc -w)
1256
1257         if [ -n "${EXPOSED_ROOT}" ]
1258         then
1259                 if [ ${rofscount} -ne 1 ]
1260                 then
1261                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1262                 fi
1263                 exposedrootfs=${rofslist%% }
1264
1265                 mount --bind ${exposedrootfs} ${rootmnt} || \
1266                         panic "bind mount of ${exposedrootfs} failed"
1267
1268                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1269                 then
1270                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1271                 else
1272                         cow_dirs=''
1273                 fi
1274
1275                 for dir in ${cow_dirs}; do
1276                         mkdir -p /cow${dir}
1277                         mount -t ${UNIONTYPE} \
1278                                 -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
1279                                 ${UNIONTYPE} "${rootmnt}${dir}" || \
1280                                 panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
1281                                         rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1282                 done
1283         else
1284                 mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
1285                         ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
1286                         ${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
1287         fi
1288
1289         # Correct the permissions of /:
1290         chmod 0755 "${rootmnt}"
1291
1292         # tmpfs file systems
1293         touch /etc/fstab
1294         mkdir -p "${rootmnt}/live"
1295         mount -t tmpfs tmpfs ${rootmnt}/live
1296
1297         # Adding other custom mounts
1298         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1299         then
1300                 # directly mount /home
1301                 # FIXME: add a custom mounts configurable system
1302
1303                 if [ -b "${homecow}" ]
1304                 then
1305                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1306                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1307                 else
1308                         log_warning_msg "Unable to find the persistent home medium"
1309                 fi
1310
1311                 # Look for other snapshots to copy in
1312                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1313                 # This second type should be removed when snapshot grow smarter
1314                 try_snap "${home_snapdata}" "${rootmnt}/home" "HOME"
1315         fi
1316
1317         if [ -n "${SHOWMOUNTS}" ]
1318         then
1319                 for d in ${rofslist}
1320                 do
1321                         mkdir -p "${rootmnt}/live/${d##*/}"
1322
1323                         case d in
1324                                 *.dir)
1325                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1326                                         ;;
1327
1328                                 *)
1329                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1330                                         ;;
1331                         esac
1332                 done
1333         fi
1334
1335         # shows cow fs on /cow for use by live-snapshot
1336         mkdir -p "${rootmnt}/live/cow"
1337         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 ${rootmnt}/live/cow"
1338 }
1339
1340 check_dev ()
1341 {
1342         sysdev="${1}"
1343         devname="${2}"
1344         skip_uuid_check="${3}"
1345
1346         if [ -z "${devname}" ]
1347         then
1348                 devname=$(sys2dev "${sysdev}")
1349         fi
1350
1351         if [ -d "${devname}" ]
1352         then
1353                 mount -o bind "${devname}" $mountpoint || continue
1354
1355                 if is_live_path $mountpoint
1356                 then
1357                         echo $mountpoint
1358                         return 0
1359                 else
1360                         umount $mountpoint
1361                 fi
1362         fi
1363
1364         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1365         then
1366                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1367                 devname="${loopdevname}"
1368         fi
1369
1370         fstype=$(get_fstype "${devname}")
1371
1372         if is_supported_fs ${fstype}
1373         then
1374                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1375
1376                 if is_live_path ${mountpoint} && \
1377                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1378                 then
1379                         echo ${mountpoint}
1380                         return 0
1381                 else
1382                         umount ${mountpoint}
1383                 fi
1384         fi
1385
1386         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1387         then
1388                 losetup -d "${loopdevname}"
1389         fi
1390
1391         return 1
1392 }
1393
1394 find_livefs ()
1395 {
1396         timeout="${1}"
1397
1398         # don't start autodetection before timeout has expired
1399         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1400         then
1401                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1402                 then
1403                         return 1
1404                 fi
1405         fi
1406
1407         # first look at the one specified in the command line
1408         case "${LIVE_MEDIA}" in
1409                 removable-usb)
1410                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1411                         do
1412                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1413                                 then
1414                                         if readlink ${sysblock} | grep -q usb ||
1415                                            readlink ${sysblock}/device | grep -q usb # linux < 2.6.29
1416                                         then
1417                                                 for dev in $(subdevices "${sysblock}")
1418                                                 do
1419                                                         if check_dev "${dev}"
1420                                                         then
1421                                                                 return 0
1422                                                         fi
1423                                                 done
1424                                         fi
1425                                 fi
1426                         done
1427                         ;;
1428
1429                 removable)
1430                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1431                         do
1432                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1433                                 then
1434                                         for dev in $(subdevices "${sysblock}")
1435                                         do
1436                                                 if check_dev "${dev}"
1437                                                 then
1438                                                         return 0
1439                                                 fi
1440                                         done
1441                                 fi
1442                         done
1443                         ;;
1444
1445                 *)
1446                         if [ ! -z "${LIVE_MEDIA}" ]
1447                         then
1448                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1449                                 then
1450                                         return 0
1451                                 fi
1452                         fi
1453                         ;;
1454         esac
1455
1456         # or do the scan of block devices
1457         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1458         do
1459                 devname=$(sys2dev "${sysblock}")
1460                 fstype=$(get_fstype "${devname}")
1461
1462                 if /lib/udev/cdrom_id ${devname} > /dev/null
1463                 then
1464                         if check_dev "null" "${devname}"
1465                         then
1466                                 return 0
1467                         fi
1468                 elif is_nice_device "${sysblock}"
1469                 then
1470                         for dev in $(subdevices "${sysblock}")
1471                         do
1472                                 if check_dev "${dev}"
1473                                 then
1474                                         return 0
1475                                 fi
1476                         done
1477                 elif [ "${fstype}" = "squashfs" -o \
1478                         "${fstype}" = "ext2" -o \
1479                         "${fstype}" = "ext3" -o \
1480                         "${fstype}" = "ext4" -o \
1481                         "${fstype}" = "jffs2" ]
1482                 then
1483                         # This is an ugly hack situation, the block device has
1484                         # an image directly on it.  It's hopefully
1485                         # live-initramfs, so take it and run with it.
1486                         ln -s "${devname}" "${devname}.${fstype}"
1487                         echo "${devname}.${fstype}"
1488                         return 0
1489                 fi
1490         done
1491
1492         return 1
1493 }
1494
1495 set_usplash_timeout ()
1496 {
1497         if [ -x /sbin/usplash_write ]
1498         then
1499                 /sbin/usplash_write "TIMEOUT 120"
1500         else if [ -x /sbin/splashy_update ] ; then
1501                 /sbin/splashy_update "TIMEOUT 120"
1502         fi ; fi
1503 }
1504
1505 integrity_check ()
1506 {
1507         media_mountpoint="${1}"
1508
1509         log_begin_msg "Checking media integrity"
1510
1511         cd ${media_mountpoint}
1512         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1513         RC="${?}"
1514
1515         log_end_msg
1516
1517         if [ "${RC}" -eq 0 ]
1518         then
1519                 log_success_msg "Everything ok, will reboot in 10 seconds."
1520                 sleep 10
1521                 cd /
1522                 umount ${media_mountpoint}
1523                 sync
1524                 echo u > /proc/sysrq-trigger
1525                 echo b > /proc/sysrq-trigger
1526         else
1527                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1528         fi
1529 }
1530
1531 mountroot ()
1532 {
1533         if [ -x /scripts/local-top/cryptroot ]; then
1534             /scripts/local-top/cryptroot
1535         fi
1536
1537         exec 6>&1
1538         exec 7>&2
1539         exec > live.log
1540         exec 2>&1
1541         tail -f live.log >&7 &
1542         tailpid="${!}"
1543
1544         # Ensure 'panic' function is overridden
1545         . /scripts/live-functions
1546
1547         Arguments
1548
1549         set_usplash_timeout
1550
1551         maybe_break live-premount
1552         log_begin_msg "Running /scripts/live-premount"
1553         run_scripts /scripts/live-premount
1554         log_end_msg
1555
1556         # Needed here too because some things (*cough* udev *cough*)
1557         # changes the timeout
1558
1559         set_usplash_timeout
1560
1561         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1562         then
1563                 if do_netmount
1564                 then
1565                         livefs_root="${mountpoint}"
1566                 else
1567                         panic "Unable to find a live file system on the network"
1568                 fi
1569         else
1570                 if [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1571                 then
1572                         # Do a local boot from hd
1573                         livefs_root=${ROOT}
1574                 else
1575                         # Scan local devices for the image
1576                         i=0
1577                         while [ "$i" -lt 60 ]
1578                         do
1579                                 livefs_root=$(find_livefs ${i})
1580
1581                                 if [ -n "${livefs_root}" ]
1582                                 then
1583                                         break
1584                                 fi
1585
1586                                 sleep 1
1587                                 i="$(($i + 1))"
1588                         done
1589                 fi
1590         fi
1591
1592         if [ -z "${livefs_root}" ]
1593         then
1594                 panic "Unable to find a medium containing a live file system"
1595         fi
1596
1597         if [ "${INTEGRITY_CHECK}" ]
1598         then
1599                 integrity_check "${livefs_root}"
1600         fi
1601
1602         if [ "${TORAM}" ]
1603         then
1604                 live_dest="ram"
1605         elif [ "${TODISK}" ]
1606         then
1607                 live_dest="${TODISK}"
1608         fi
1609
1610         if [ "${live_dest}" ]
1611         then
1612                 log_begin_msg "Copying live media to ${live_dest}"
1613                 copy_live_to "${livefs_root}" "${live_dest}"
1614                 log_end_msg
1615         fi
1616
1617         if [ -n "${MODULETORAMFILE}" ]
1618         then
1619                 setup_unionfs "${livefs_root}" "${rootmnt}"
1620         else
1621                 mac="$(get_mac)"
1622                 mac="$(echo ${mac} | sed 's/-//g')"
1623                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1624         fi
1625
1626         log_end_msg
1627
1628         maybe_break live-bottom
1629         log_begin_msg "Running /scripts/live-bottom\n"
1630
1631         run_scripts /scripts/live-bottom
1632         log_end_msg
1633
1634         exec 1>&6 6>&-
1635         exec 2>&7 7>&-
1636         kill ${tailpid}
1637         [ -w "${rootmnt}/var/log/" ] && cp live.log "${rootmnt}/var/log/" 2>/dev/null
1638 }