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 [ -f /etc/live.conf ] && . /etc/live.conf
  25 export USERNAME USERFULLNAME HOSTNAME
  26
  27 . /scripts/live-helpers
  28
  29 if [ ! -f /live.vars ]
  30 then
  31         touch /live.vars
  32 fi
  33
  34 Arguments ()
  35 {
  36         PRESEEDS=""
  37
  38         for ARGUMENT in $(cat /proc/cmdline)
  39         do
  40                 case "${ARGUMENT}" in
  41                         access=*)
  42                                 ACCESS="${ARGUMENT#access=}"
  43                                 export ACCESS
  44                                 ;;
  45
  46                         console=*)
  47                                 DEFCONSOLE="${ARGUMENT#*=}"
  48                                 export DEFCONSOLE
  49                                 ;;
  50
  51                         debug)
  52                                 DEBUG="Yes"
  53                                 export DEBUG
  54
  55                                 set -x
  56                                 ;;
  57
  58                         fetch=*)
  59                                 FETCH="${ARGUMENT#fetch=}"
  60                                 export FETCH
  61                                 ;;
  62
  63                         hostname=*)
  64                                 HOSTNAME="${ARGUMENT#hostname=}"
  65                                 LIVECONF="changed"
  66                                 export HOSTNAME LIVECONF
  67                                 ;;
  68
  69                         username=*)
  70                                 USERNAME="${ARGUMENT#username=}"
  71                                 LIVECONF="changed"
  72                                 export USERNAME LIVECONF
  73                                 ;;
  74
  75                         userfullname=*)
  76                                 USERFULLNAME="${ARGUMENT#userfullname=}"
  77                                 LIVECONF="changed"
  78                                 export USERFULLNAME LIVECONF
  79                                 ;;
  80
  81                         ignore_uuid)
  82                                 IGNORE_UUID="Yes"
  83                                 export IGNORE_UUID
  84                                 ;;
  85
  86                         ip=*)
  87                                 STATICIP="${ARGUMENT#ip=}"
  88
  89                                 if [ -z "${STATICIP}" ]
  90                                 then
  91                                         STATICIP="frommedia"
  92                                 fi
  93
  94                                 export STATICIP
  95                                 ;;
  96
  97                         keyb=*|kbd-chooser/method=*)
  98                                 KBD="${ARGUMENT#*=}"
  99                                 export KBD
 100                                 ;;
 101
 102                         klayout=*|console-setup/layoutcode=*)
 103                                 KLAYOUT="${ARGUMENT#*=}"
 104                                 export KLAYOUT
 105                                 ;;
 106
 107                         kvariant=*|console-setup/variantcode=*)
 108                                 KVARIANT="${ARGUMENT#*=}"
 109                                 export KVARIANT
 110                                 ;;
 111
 112                         kmodel=*|console-setup/modelcode=*)
 113                                 KMODEL="${ARGUMENT#*=}"
 114                                 export KMODEL
 115                                 ;;
 116
 117                         koptions=*)
 118                                 KOPTIONS="${ARGUMENT#koptions=}"
 119                                 export KOPTIONS
 120                                 ;;
 121
 122                         live-getty)
 123                                 LIVE_GETTY="1"
 124                                 export LIVE_GETTY
 125                                 ;;
 126
 127                         live-media=*|bootfrom=*)
 128                                 LIVE_MEDIA="${ARGUMENT#*=}"
 129                                 export LIVE_MEDIA
 130                                 ;;
 131
 132                         live-media-encryption=*|encryption=*)
 133                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 134                                 export LIVE_MEDIA_ENCRYPTION
 135                                 ;;
 136
 137                         live-media-offset=*)
 138                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 139                                 export LIVE_MEDIA_OFFSET
 140                                 ;;
 141
 142                         live-media-path=*)
 143                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 144                                 export LIVE_MEDIA_PATH
 145                                 ;;
 146
 147                         live-media-timeout=*)
 148                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 149                                 export LIVE_MEDIA_TIMEOUT
 150                                 ;;
 151
 152                         locale=*|debian-installer/locale=*)
 153                                 LOCALE="${ARGUMENT#*=}"
 154                                 export LOCALE
 155                                 ;;
 156
 157                         module=*)
 158                                 MODULE="${ARGUMENT#module=}"
 159                                 export MODULE
 160                                 ;;
 161
 162                         netboot=*)
 163                                 NETBOOT="${ARGUMENT#netboot=}"
 164                                 export NETBOOT
 165                                 ;;
 166
 167                         nfsopts=*)
 168                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 169                                 export NFSOPTS
 170                                 ;;
 171
 172                         nfscow=*)
 173                                 NFS_COW="${ARGUMENT#nfscow=}"
 174                                 export NFS_COW
 175                                 ;;
 176
 177                         noaccessibility)
 178                                 NOACCESSIBILITY="Yes"
 179                                 export NOACCESSIBILITY
 180                                 ;;
 181
 182                         noapparmor)
 183                                 NOAPPARMOR="Yes"
 184                                 export NOAPPARMOR
 185                                 ;;
 186
 187                         noaptcdrom)
 188                                 NOAPTCDROM="Yes"
 189                                 export NOAPTCDROM
 190                                 ;;
 191
 192                         noautologin)
 193                                 NOAUTOLOGIN="Yes"
 194                                 export NOAUTOLOGIN
 195                                 ;;
 196
 197                         noxautologin)
 198                                 NOXAUTOLOGIN="Yes"
 199                                 export NOXAUTOLOGIN
 200                                 ;;
 201
 202                         noconsolekeyboard)
 203                                 NOCONSOLEKEYBOARD="Yes"
 204                                 export NOCONSOLEKEYBOARD
 205                                 ;;
 206
 207                         nofastboot)
 208                                 NOFASTBOOT="Yes"
 209                                 export NOFASTBOOT
 210                                 ;;
 211
 212                         nofstab)
 213                                 NOFSTAB="Yes"
 214                                 export NOFSTAB
 215                                 ;;
 216
 217                         nognomepanel)
 218                                 NOGNOMEPANEL="Yes"
 219                                 export NOGNOMEPANEL
 220                                 ;;
 221
 222                         nohosts)
 223                                 NOHOSTS="Yes"
 224                                 export NOHOSTS
 225                                 ;;
 226
 227                         nokpersonalizer)
 228                                 NOKPERSONALIZER="Yes"
 229                                 export NOKPERSONALIZER
 230                                 ;;
 231
 232                         nokwallet)
 233                                 NOKWALLET="Yes"
 234                                 export NOKWALLET
 235                                 ;;
 236
 237                         nolanguageselector)
 238                                 NOLANGUAGESELECTOR="Yes"
 239                                 export NOLANGUAGESELECTOR
 240                                 ;;
 241
 242                         nolocales)
 243                                 NOLOCALES="Yes"
 244                                 export NOLOCALES
 245                                 ;;
 246
 247                         nonetworking)
 248                                 NONETWORKING="Yes"
 249                                 export NONETWORKING
 250                                 ;;
 251
 252                         nopowermanagement)
 253                                 NOPOWERMANAGEMENT="Yes"
 254                                 export NOPOWERMANAGEMENT
 255                                 ;;
 256
 257                         noprogramcrashes)
 258                                 NOPROGRAMCRASHES="Yes"
 259                                 export NOPROGRAMCRASHES
 260                                 ;;
 261
 262                         norestrictedmanager)
 263                                 NORESTRICTEDMANAGER="Yes"
 264                                 export NORESTRICTEDMANAGER
 265                                 ;;
 266
 267                         nosudo)
 268                                 NOSUDO="Yes"
 269                                 export NOSUDO
 270                                 ;;
 271
 272                         noswap)
 273                                 NOSWAP="Yes"
 274                                 export NOSWAP
 275                                 ;;
 276
 277                         noupdatenotifier)
 278                                 NOUPDATENOTIFIER="Yes"
 279                                 export NOUPDATENOTIFIER
 280                                 ;;
 281
 282                         nouser)
 283                                 NOUSER="Yes"
 284                                 export NOUSER
 285                                 ;;
 286
 287                         noxautoconfig)
 288                                 NOXAUTOCONFIG="Yes"
 289                                 export NOXAUTOCONFIG
 290                                 ;;
 291
 292                         noxscreensaver)
 293                                 NOXSCREENSAVER="Yes"
 294                                 export NOXSCREENSAVER
 295                                 ;;
 296
 297                         persistent)
 298                                 PERSISTENT="Yes"
 299                                 export PERSISTENT
 300                                 ;;
 301
 302                         nopersistent)
 303                                 NOPERSISTENT="Yes"
 304                                 export NOPERSISTENT
 305                                 ;;
 306
 307                         preseed/file=*|file=*)
 308                                 LOCATION="${ARGUMENT#*=}"
 309                                 export LOCATION
 310                                 ;;
 311
 312                         nopreseed)
 313                                 NOPRESEED="Yes"
 314                                 export NOPRESEED
 315                                 ;;
 316
 317                         url=*)
 318                                 location="${ARGUMENT#url=}"
 319
 320                                 mount -n -o bind /sys /root/sys
 321                                 mount -n -o bind /proc /root/proc
 322                                 mount -n -o bind /dev /root/dev
 323
 324                                 mkdir -p /root/var/run/network
 325                                 chroot /root ifup -a
 326                                 chroot /root wget -P /tmp "${location}"
 327                                 chroot /root ifdown -a
 328
 329                                 umount /root/sys
 330                                 umount /root/proc
 331                                 umount /root/dev
 332
 333                                 LOCATION="/tmp/$(basename "${location}")"
 334                                 ;;
 335
 336                         */*=*)
 337                                 question="${ARGUMENT%%=*}"
 338                                 value="${ARGUMENT#*=}"
 339                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 340                                 export PRESEEDS
 341                                 ;;
 342
 343                         showmounts)
 344                                 SHOWMOUNTS="Yes"
 345                                 export SHOWMOUNTS
 346                                 ;;
 347
 348                         textonly)
 349                                 TEXTONLY="Yes"
 350                                 export TEXTONLY
 351                                 ;;
 352
 353                         timezone=*)
 354                                 TIMEZONE="${ARGUMENT#timezone=}"
 355                                 export TIMEZONE
 356                                 ;;
 357
 358                         notimezone)
 359                                 NOTIMEZONE="Yes"
 360                                 export NOTIMEZONE
 361                                 ;;
 362
 363                         todisk=*)
 364                                 TODISK="${ARGUMENT#todisk=}"
 365                                 export TODISK
 366                                 ;;
 367
 368                         toram)
 369                                 TORAM="Yes"
 370                                 export TORAM
 371                                 ;;
 372
 373                         toram=*)
 374                                 TORAM="Yes"
 375                                 MODULETORAM="${ARGUMENT#toram=}"
 376                                 export TORAM MODULETORAM
 377                                 ;;
 378
 379                         exposedroot)
 380                                 EXPOSED_ROOT="Yes"
 381                                 export EXPOSED_ROOT
 382                                 ;;
 383
 384                         union=*)
 385                                 UNIONTYPE="${ARGUMENT#union=}"
 386                                 export UNIONTYPE
 387                                 ;;
 388
 389                         utc=*)
 390                                 UTC="${ARGUMENT#utc=}"
 391                                 export UTC
 392                                 ;;
 393
 394                         xdebconf)
 395                                 XDEBCONF="Yes"
 396                                 export XDEBCONF
 397                                 ;;
 398
 399                         xvideomode=*)
 400                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 401                                 export XVIDEOMODE
 402                                 ;;
 403                 esac
 404         done
 405
 406         # sort of compatibility with netboot.h from linux docs
 407         if [ -z "${NETBOOT}" ]
 408         then
 409                 if [ "${ROOT}" = "/dev/nfs" ]
 410                 then
 411                         NETBOOT="nfs"
 412                         export NETBOOT
 413                 elif [ "${ROOT}" = "/dev/cifs" ]
 414                 then
 415                         NETBOOT="cifs"
 416                         export NETBOOT
 417                 fi
 418         fi
 419
 420         if [ -z "${MODULE}" ]
 421         then
 422                 MODULE="filesystem"
 423                 export MODULE
 424         fi
 425
 426         if [ -z "${UNIONTYPE}" ]
 427         then
 428                 UNIONTYPE="unionfs"
 429                 export UNIONTYPE
 430         fi
 431 }
 432
 433 is_live_path ()
 434 {
 435         DIRECTORY="${1}"
 436
 437         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 438         then
 439                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 440                 do
 441                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 442                         then
 443                                 return 0
 444                         fi
 445                 done
 446         fi
 447
 448         return 1
 449 }
 450
 451 matches_uuid ()
 452 {
 453         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 454         then
 455                 return 0
 456         fi
 457
 458         path="${1}"
 459         uuid="$(cat /conf/uuid.conf)"
 460
 461         for try_uuid_file in "${mountpoint}/.disk/casper-uuid"*
 462         do
 463                 [ -e "${try_uuid_file}" ] || continue
 464
 465                 try_uuid="$(cat "${try_uuid_file}")"
 466
 467                 if [ "${uuid}" = "${try_uuid}" ]
 468                 then
 469                         return 0
 470                 fi
 471         done
 472
 473         return 1
 474 }
 475
 476 get_backing_device ()
 477 {
 478         case "${1}" in
 479                 *.squashfs|*.ext2|*.ext3)
 480                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}")
 481                         ;;
 482
 483                 *.dir)
 484                         echo "directory"
 485                         ;;
 486
 487                 *)
 488                         panic "Unrecognized live filesystem: ${1}"
 489                         ;;
 490         esac
 491 }
 492
 493 match_files_in_dir ()
 494 {
 495         # Does any files match pattern ${1} ?
 496         local pattern="${1}"
 497
 498         if [ "$(echo ${pattern})" != "${pattern}" ]
 499         then
 500                 return 0
 501         fi
 502
 503         return 1
 504 }
 505
 506 mount_images_in_directory ()
 507 {
 508         directory="${1}"
 509         rootmnt="${2}"
 510         mac="${3}"
 511
 512
 513         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 514                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 515                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 516                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 517         then
 518                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 519                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 520         else
 521                 :
 522         fi
 523 }
 524
 525 is_nice_device ()
 526 {
 527         sysfs_path="${1#/sys}"
 528
 529         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"
 530         then
 531                 return 0
 532         fi
 533
 534         return 1
 535 }
 536
 537 is_supported_fs ()
 538 {
 539         # FIXME: do something better like the scan of supported filesystems
 540         fstype="${1}"
 541
 542         case ${fstype} in
 543                 vfat|iso9660|udf|ext2|ext3|ntfs)
 544                         return 0
 545                         ;;
 546         esac
 547
 548         return 1
 549 }
 550
 551 copy_live_to ()
 552 {
 553         copyfrom="${1}"
 554         copytodev="${2}"
 555         copyto="${copyfrom}_swap"
 556
 557         if [ -z "${MODULETORAM}" ]
 558         then
 559                 size=$(fs_size "" ${copyfrom} "used")
 560         else
 561                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 562
 563                 if [ -f "${MODULETORAMFILE}" ]
 564                 then
 565                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 566                 else
 567                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 568                         return 1
 569                 fi
 570         fi
 571
 572         if [ "${copytodev}" = "ram" ]
 573         then
 574                 # copying to ram:
 575                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
 576                 mount_options="-o size=${size}k"
 577                 free_string="memory"
 578                 fstype="tmpfs"
 579                 dev="/dev/shm"
 580         else
 581                 # it should be a writable block device
 582                 if [ -b "${copytodev}" ]
 583                 then
 584                         dev="${copytodev}"
 585                         free_string="space"
 586                         fstype=$(get_fstype "${dev}")
 587                         freespace=$(fs_size "${dev}")
 588                 else
 589                         [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
 590                         return 1
 591                 fi
 592         fi
 593
 594         if [ "${freespace}" -lt "${size}" ]
 595         then
 596                 [ "${quiet}" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 597                 return 1
 598         fi
 599
 600         # begin copying (or uncompressing)
 601         mkdir "${copyto}"
 602         echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 603         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 604
 605         if [ "${extension}" = "tgz" ]
 606         then
 607                 cd "${copyto}"
 608                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 609                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 610                 mount -r --move "${copyto}" "${rootmnt}"
 611                 cd "${OLDPWD}"
 612         else
 613                 if [ -n "${MODULETORAMFILE}" ]
 614                 then
 615                         cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 616                 else
 617                         cp -a ${copyfrom}/* ${copyto}   # "cp -a" from busybox also copies hidden files
 618                 fi
 619
 620                 livefs_root
 621                 umount ${copyfrom}
 622                 mount -r --move ${copyto} ${copyfrom}
 623         fi
 624
 625         rmdir ${copyto}
 626         return 0
 627 }
 628
 629 do_netmount ()
 630 {
 631         rc=1
 632
 633         modprobe -q af_packet # For DHCP
 634
 635         udevtrigger
 636         udevsettle
 637
 638         ipconfig ${DEVICE} | tee /netboot.config
 639
 640         # source relevant ipconfig output
 641         OLDHOSTNAME=${HOSTNAME}
 642         . /tmp/net-${DEVICE}.conf
 643         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 644         export HOSTNAME
 645
 646         if [ "${NFSROOT}" = "auto" ]
 647         then
 648                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 649         fi
 650
 651         if [ -n "${FETCH}" ] && do_httpmount
 652         then
 653                 rc=0
 654                 return ${rc}
 655         fi
 656
 657         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 658         then
 659                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 660         fi
 661
 662         [ "${quiet}" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
 663
 664         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 665         then
 666                 rc=0
 667         elif do_nfsmount
 668         then
 669                 NETBOOT="nfs"
 670                 export NETBOOT
 671                 rc=0
 672         fi
 673
 674         [ "${quiet}" != "y" ] && log_end_msg
 675         return ${rc}
 676 }
 677
 678 do_httpmount ()
 679 {
 680         rc=1
 681         extension=$(echo "${FETCH}" | sed 's/\(.*\)\.\(.*\)/\2/')
 682
 683         case "${extension}" in
 684                 squashfs|tgz|tar)
 685                         [ "${quiet}" != "y" ] && log_begin_msg "Trying wget ${FETCH} -O ${mountpoint}/$(basename ${FETCH})"
 686                         mkdir -p "${mountpoint}/${LIVE_MEDIA_PATH}"
 687                         wget "${FETCH}" -O "${mountpoint}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 688                         [ ${?} -eq 0 ] && rc=0
 689                         [ "${extension}" = "tgz" ] && live_dest="ram"
 690                         ;;
 691
 692                 *)
 693                         [ "${quiet}" != "y" ] && log_begin_msg "Unrecognized archive extension for ${FETCH}"
 694         esac
 695
 696         return ${rc}
 697 }
 698
 699 do_nfsmount ()
 700 {
 701         rc=1
 702
 703         modprobe -q nfs
 704
 705         if [ -z "${NFSOPTS}" ]
 706         then
 707                 NFSOPTS=""
 708         fi
 709
 710         [ "${quiet}" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 711
 712         # FIXME: This for loop is an ugly HACK round an nfs bug
 713         for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13
 714         do
 715                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 716                 sleep 1
 717         done
 718
 719         return ${rc}
 720 }
 721
 722 do_cifsmount ()
 723 {
 724         rc=1
 725
 726         if [ -x "/sbin/mount.cifs" ]
 727         then
 728                 if [ -z "${NFSOPTS}" ]
 729                 then
 730                         CIFSOPTS="-ouser=root,password="
 731                 else
 732                         CIFSOPTS="${NFSOPTS}"
 733                 fi
 734
 735                 [ "${quiet}" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 736                 modprobe -q cifs
 737
 738                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 739                 then
 740                         rc=0
 741                 fi
 742         fi
 743
 744         return ${rc}
 745 }
 746
 747 do_snap_copy ()
 748 {
 749         fromdev="${1}"
 750         todir="${2}"
 751         snap_type="${3}"
 752         size=$(fs_size "${fromdev}" "" "used")
 753
 754         if [ -b "${fromdev}" ]
 755         then
 756                 # look for free mem
 757                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 758                 then
 759                         todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
 760                         freespace=$(df -k  | grep -s ${todev} | awk '{print $4}')
 761                 else
 762                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
 763                 fi
 764
 765                 tomount="/mnt/tmpsnap"
 766
 767                 if [ ! -d "${tomount}" ]
 768                 then
 769                         mkdir -p "${tomount}"
 770                 fi
 771
 772                 fstype=$(get_fstype "${fromdev}")
 773
 774                 if [ -n "${fstype}" ]
 775                 then
 776                         # Copying stuff...
 777                         mount -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
 778                         cp -a "${tomount}"/* ${todir}
 779                         umount "${tomount}"
 780                 else
 781                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 782                 fi
 783
 784                 rmdir "${tomount}"
 785
 786                 if echo ${fromdev} | grep -qs loop
 787                 then
 788                         losetup -d "${fromdev}"
 789                 fi
 790
 791                 return 0
 792         else
 793                 return 1
 794
 795                 [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 796         fi
 797 }
 798
 799 try_snap ()
 800 {
 801         # Look for ${snap_label}.* in block devices and copy the contents to ${snap_mount}
 802         # and remember the device and filename for resync on exit in live-initramfs.init
 803
 804         snap_label="${1}"
 805         snap_mount="${2}"
 806         snap_type="${3}"
 807         snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3")
 808
 809         if [ ! -z "${snapdata}" ]
 810         then
 811                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 812                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 813                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 814
 815                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\)'
 816                 then
 817                         # squashfs or ext2/ext3 snapshot
 818                         dev=$(get_backing_device "${snapback}/${snapfile}")
 819
 820                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 821                         then
 822                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 823                                 return 1
 824                         fi
 825                 else
 826                         # cpio.gz snapshot
 827                         if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null)
 828                         then
 829                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 830                                 return 1
 831                         fi
 832                 fi
 833
 834                 umount "${snapback}"
 835         else
 836                 dev=$(find_cow_device "${snap_label}")
 837
 838                 if [ -b ${dev} ]
 839                 then
 840                         if echo "${dev}" | grep -qs loop
 841                         then
 842                                 # strange things happens, user confused?
 843                                 snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 844                                 snapfile=$(basename ${snaploop})
 845                                 snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 846                         else
 847                                 snapdev="${dev}"
 848                         fi
 849
 850                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 851                         then
 852                                 log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 853                                 return 1
 854                         else
 855                                 if [ -n "${snapfile}" ]
 856                                 then
 857                                         # it was a loop device, user confused
 858                                         umount ${snapdev}
 859                                 fi
 860                         fi
 861                 else
 862                         log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 863                         return 1
 864                 fi
 865         fi
 866
 867         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
 868         return 0
 869 }
 870
 871 setup_unionfs ()
 872 {
 873         image_directory="${1}"
 874         rootmnt="${2}"
 875         addimage_directory="${3}"
 876         modprobe -q -b ${UNIONTYPE}
 877
 878         # run-init can't deal with images in a subdir, but we're going to
 879         # move all of these away before it runs anyway.  No, we're not,
 880         # put them in / since move-mounting them into / breaks mono and
 881         # some other apps.
 882
 883         croot="/"
 884
 885         # Let's just mount the read-only file systems first
 886         rofsstring=""
 887         rofslist=""
 888         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
 889
 890         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
 891         then
 892                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
 893                 roopt="nfsro"
 894         else
 895                 roopt="ro"
 896         fi
 897
 898         # Read image names from ${MODULE}.module if it exists
 899         if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
 900         then
 901                 for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
 902                 do
 903                         image_string="${image_string} ${image_directory}/${IMAGE}"
 904                 done
 905         elif [ -e "${image_directory}/${MODULE}.module" ]
 906         then
 907                 for IMAGE in $(cat ${image_directory}/${MODULE}.module)
 908                 do
 909                         image_string="${image_string} ${image_directory}/${IMAGE}"
 910                 done
 911         else
 912                 # ${MODULE}.module does not exist, create a list of images
 913                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 914                 do
 915                         for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
 916                         do
 917                                 if [ -e "${IMAGE}" ]
 918                                 then
 919                                         image_string="${image_string} ${IMAGE}"
 920                                 fi
 921                         done
 922                 done
 923
 924                 if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
 925                 then
 926                         for FILESYSTEM in squashfs ext2 ext3 xfs dir
 927                         do
 928                                 for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
 929                                 do
 930                                         if [ -e "${IMAGE}" ]
 931                                         then
 932                                                 image_string="${image_string} ${IMAGE}"
 933                                         fi
 934                                 done
 935                         done
 936                 fi
 937
 938                 # Now sort the list
 939                 image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
 940         fi
 941
 942         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
 943
 944         mkdir -p "${croot}"
 945
 946         for image in ${image_string}
 947         do
 948                 imagename=$(basename "${image}")
 949
 950                 if [ -d "${image}" ]
 951                 then
 952                         # it is a plain directory: do nothing
 953                         rofsstring="${image}=${roopt}:${rofsstring}"
 954                         rofslist="${image} ${rofslist}"
 955                 elif [ -f "${image}" ]
 956                 then
 957                         backdev=$(get_backing_device "${image}")
 958                         fstype=$(get_fstype "${backdev}")
 959
 960                         if [ "${fstype}" = "unknown" ]
 961                         then
 962                                 panic "Unknown file system type on ${backdev} (${image})"
 963                         fi
 964
 965                         mkdir -p "${croot}/${imagename}"
 966                         echo "debug: Can not mount backdev ${backdev} (image = ${image}) on croot/imagename ${croot}/${imagename}"
 967                         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} ${rofslist}"
 968                 fi
 969         done
 970
 971         rofsstring=${rofsstring%:}
 972
 973         mkdir -p /cow
 974
 975         # Looking for "${root_persistence}" device or file
 976         if [ -n "${PERSISTENT}" ]
 977         then
 978                 cowprobe=$(find_cow_device "${root_persistence}")
 979
 980                 if [ -b "${cowprobe}" ]
 981                 then
 982                         cowdevice=${cowprobe}
 983                         cow_fstype=$(get_fstype "${cowprobe}")
 984                 else
 985                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent medium"
 986                         cowdevice="tmpfs"
 987                         cow_fstype="tmpfs"
 988                 fi
 989         elif [ -n "${NFS_COW}" ]
 990         then
 991                 # check if there are any nfs options
 992                 if echo ${NFS_COW}|grep -q ','
 993                 then
 994                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
 995                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
 996                 else
 997                         nfs_cow_opts="-o nolock"
 998                         nfs_cow=${NFS_COW}
 999                 fi
1000                 mac="$(get_mac)"
1001                 if [ -n "${mac}" ]
1002                 then
1003                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1004                         cow_fstype="nfs"
1005                 else
1006                         panic "unable to determine mac address"
1007                 fi
1008         else
1009                 cowdevice="tmpfs"
1010                 cow_fstype="tmpfs"
1011         fi
1012
1013         if [ "${cow_fstype}" = "nfs" ]
1014         then
1015                 [ "${quiet}" != "y" ] && log_begin_msg \
1016                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1017                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1018                         panic "Can not mount ${cowdevice} on /cow"
1019         else
1020                 mount ${cowdevice} -t ${cow_fstype} -o rw,noatime /cow || \
1021                         panic "Can not mount ${cowdevice} on /cow"
1022         fi
1023
1024         rofscount=$(echo ${rofslist} |wc -w)
1025
1026         if [ -n "${EXPOSED_ROOT}" ]
1027         then
1028                 if [ ${rofscount} -ne 1 ]
1029                 then
1030                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1031                 fi
1032                 exposedrootfs=${rofslist%% }
1033
1034                 mount --bind ${exposedrootfs} ${rootmnt} || \
1035                         panic "bind mount of ${exposedrootfs} failed"
1036
1037                 cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool
1038                         /home /var/lib/live'
1039
1040                 for dir in ${cow_dirs}; do
1041                         mkdir -p /cow${dir}
1042                         mount -t ${UNIONTYPE} \
1043                                 -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
1044                                 ${UNIONTYPE} "${rootmnt}${dir}" || \
1045                                 panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
1046                                         rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1047                 done
1048         else
1049                 mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
1050                         ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
1051                         ${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
1052         fi
1053
1054         # tmpfs file systems
1055         mkdir -p "${rootmnt}/live"
1056         mount -t tmpfs tmpfs ${rootmnt}/live
1057
1058         # Adding other custom mounts
1059         if [ -n "${PERSISTENT}" ]
1060         then
1061                 # directly mount /home
1062                 # FIXME: add a custom mounts configurable system
1063                 homecow=$(find_cow_device "${home_persistence}" )
1064
1065                 if [ -b "${homecow}" ]
1066                 then
1067                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1068                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1069                 else
1070                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
1071                 fi
1072
1073                 # Look for other snapshots to copy in
1074                 try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
1075                 try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
1076         fi
1077
1078         if [ -n "${SHOWMOUNTS}" ]
1079         then
1080                 for d in ${rofslist}
1081                 do
1082                         mkdir -p "${rootmnt}/live/${d##*/}"
1083
1084                         case d in
1085                                 *.dir)
1086                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1087                                         ;;
1088
1089                                 *)
1090                                         mount --move "${d}" "${rootmnt}/live/${d##*/}"
1091                                         ;;
1092                         esac
1093                 done
1094         fi
1095
1096         # shows cow fs on /cow for use by live-snapshot
1097         mkdir -p "${rootmnt}/live/cow"
1098         mount -o move /cow "${rootmnt}/live/cow"
1099 }
1100
1101 check_dev ()
1102 {
1103         sysdev="${1}"
1104         devname="${2}"
1105         skip_uuid_check="${3}"
1106
1107         if [ -z "${devname}" ]
1108         then
1109                 devname=$(sys2dev "${sysdev}")
1110         fi
1111
1112         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1113         then
1114                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1115                 devname="${loopdevname}"
1116         fi
1117
1118         fstype=$(get_fstype "${devname}")
1119
1120         if is_supported_fs ${fstype}
1121         then
1122                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1123
1124                 if is_live_path ${mountpoint} && \
1125                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1126                 then
1127                         echo ${mountpoint}
1128                         return 0
1129                 else
1130                         umount ${mountpoint}
1131                 fi
1132         fi
1133
1134         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1135         then
1136                 losetup -d "${loopdevname}"
1137         fi
1138
1139         return 1
1140 }
1141
1142 find_livefs ()
1143 {
1144         timeout="${1}"
1145
1146         # first look at the one specified in the command line
1147         if [ ! -z "${LIVE_MEDIA}" ]
1148         then
1149                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1150                 then
1151                         return 0
1152                 fi
1153         fi
1154
1155         # don't start autodetection before timeout has expired
1156         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1157         then
1158                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1159                 then
1160                         return 1
1161                 fi
1162         fi
1163
1164         # or do the scan of block devices
1165         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram)
1166         do
1167                 devname=$(sys2dev "${sysblock}")
1168                 fstype=$(get_fstype "${devname}")
1169
1170                 if /lib/udev/cdrom_id ${devname} > /dev/null
1171                 then
1172                         if check_dev "null" "${devname}"
1173                         then
1174                                 return 0
1175                         fi
1176                 elif is_nice_device "${sysblock}"
1177                 then
1178                         for dev in $(subdevices "${sysblock}")
1179                         do
1180                                 if check_dev "${dev}"
1181                                 then
1182                                         return 0
1183                                 fi
1184                         done
1185                 elif [ "${fstype}" = "squashfs" -o \
1186                         "${fstype}" = "ext2" -o \
1187                         "${fstype}" = "ext3" ]
1188                 then
1189                         # This is an ugly hack situation, the block device has
1190                         # an image directly on it.  It's hopefully
1191                         # live-initramfs, so take it and run with it.
1192                         ln -s "${devname}" "${devname}.${fstype}"
1193                         echo "${devname}.${fstype}"
1194                         return 0
1195                 fi
1196         done
1197
1198         return 1
1199 }
1200
1201 set_usplash_timeout ()
1202 {
1203         if [ -x /sbin/usplash_write ]
1204         then
1205                 /sbin/usplash_write "TIMEOUT 120"
1206         fi
1207 }
1208
1209 mountroot ()
1210 {
1211         exec 6>&1
1212         exec 7>&2
1213         exec > live.log
1214         exec 2>&1
1215
1216         Arguments
1217
1218         set_usplash_timeout
1219         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-premount"
1220         run_scripts /scripts/live-premount
1221         [ "${quiet}" != "y" ] && log_end_msg
1222
1223         # Needed here too because some things (*cough* udev *cough*)
1224         # changes the timeout
1225
1226         set_usplash_timeout
1227
1228         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ]
1229         then
1230                 if do_netmount
1231                 then
1232                         livefs_root="${mountpoint}"
1233                 else
1234                         panic "Unable to find a live file system on the network"
1235                 fi
1236         else
1237                 # Scan local devices for the image
1238                 for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
1239                 do
1240                         livefs_root=$(find_livefs ${i})
1241
1242                         if [ -n "${livefs_root}" ]
1243                         then
1244                                 break
1245                         fi
1246
1247                         sleep 1
1248                 done
1249         fi
1250
1251         if [ -z "${livefs_root}" ]
1252         then
1253                 panic "Unable to find a medium containing a live file system"
1254         fi
1255
1256         if [ "${TORAM}" ]
1257         then
1258                 live_dest="ram"
1259         elif [ "${TODISK}" ]
1260         then
1261                 live_dest="${TODISK}"
1262         fi
1263
1264         if [ "${live_dest}" ]
1265         then
1266                 log_begin_msg "Copying live media to ${live_dest}"
1267                 copy_live_to "${livefs_root}" "${live_dest}"
1268                 log_end_msg
1269         fi
1270
1271         if [ -n "${MODULETORAMFILE}" ]
1272         then
1273                 setup_unionfs "${livefs_root}" "${rootmnt}"
1274         else
1275                 mac="$(get_mac)"
1276                 mac="$(echo ${mac} | sed 's/-//g')"
1277                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1278         fi
1279
1280         log_end_msg
1281
1282         maybe_break live-bottom
1283         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-bottom"
1284
1285         run_scripts /scripts/live-bottom
1286         [ "${quiet}" != "y" ] && log_end_msg
1287
1288         exec 1>&6 6>&-
1289         exec 2>&7 7>&-
1290         cp live.log "${rootmnt}/var/log/"
1291 }