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