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 BUILD_SYSTEM="Custom"
  22
  23 mkdir -p "${mountpoint}"
  24
  25 [ -f /etc/live.conf ] && . /etc/live.conf
  26 export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
  27
  28 . /scripts/live-helpers
  29
  30 if [ ! -f /live.vars ]
  31 then
  32         touch /live.vars
  33 fi
  34
  35 Arguments ()
  36 {
  37         PRESEEDS=""
  38
  39         for ARGUMENT in $(cat /proc/cmdline)
  40         do
  41                 case "${ARGUMENT}" in
  42                         access=*)
  43                                 ACCESS="${ARGUMENT#access=}"
  44                                 export ACCESS
  45                                 ;;
  46
  47                         console=*)
  48                                 DEFCONSOLE="${ARGUMENT#*=}"
  49                                 export DEFCONFSOLE
  50                                 ;;
  51
  52                         debug)
  53                                 DEBUG="Yes"
  54                                 export DEBUG
  55
  56                                 set -x
  57                                 ;;
  58
  59                         fetch=*)
  60                                 FETCH="${ARGUMENT#fetch=}"
  61                                 export FETCH
  62                                 ;;
  63
  64                         hostname=*)
  65                                 HOSTNAME="${ARGUMENT#hostname=}"
  66                                 LIVECONF="changed"
  67                                 export HOSTNAME LIVECONF
  68                                 ;;
  69
  70                         username=*)
  71                                 USERNAME="${ARGUMENT#username=}"
  72                                 LIVECONF="changed"
  73                                 export USERNAME LIVECONF
  74                                 ;;
  75
  76                         userfullname=*)
  77                                 USERFULLNAME="${ARGUMENT#userfullname=}"
  78                                 LIVECONF="changed"
  79                                 export USERFULLNAME LIVECONF
  80                                 ;;
  81
  82                         ignore_uuid)
  83                                 IGNORE_UUID="Yes" ;;
  84
  85                         ip=*)
  86                                 STATICIP="${ARGUMENT#ip=}"
  87
  88                                 if [ -z "${STATICIP}" ]
  89                                 then
  90                                         STATICIP="frommedia"
  91                                 fi
  92
  93                                 export STATICIP
  94                                 ;;
  95
  96                         keyb=*|kbd-chooser/method=*)
  97                                 KBD="${ARGUMENT#*=}"
  98                                 export KBD
  99                                 ;;
 100
 101                         klayout=*|console-setup/layoutcode=*)
 102                                 KLAYOUT="${ARGUMENT#*=}"
 103                                 export KLAYOUT
 104                                 ;;
 105
 106                         kvariant=*|console-setup/variantcode=*)
 107                                 KVARIANT="${ARGUMENT#*=}"
 108                                 export KVARIANT
 109                                 ;;
 110
 111                         kmodel=*|console-setup/modelcode=*)
 112                                 KMODEL="${ARGUMENT#*=}"
 113                                 export KMODEL
 114                                 ;;
 115
 116                         koptions=*)
 117                                 KOPTIONS="${ARGUMENT#koptions=}"
 118                                 export KOPTIONS
 119                                 ;;
 120
 121                         live-getty)
 122                                 LIVE_GETTY="1"
 123                                 export LIVE_GETTY
 124                                 ;;
 125
 126                         live-media=*|bootfrom=*)
 127                                 LIVE_MEDIA="${ARGUMENT#*=}"
 128                                 export LIVE_MEDIA
 129                                 ;;
 130
 131                         live-media-encryption=*|encryption=*)
 132                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 133                                 export LIVE_MEDIA_ENCRYPTION
 134                                 ;;
 135
 136                         live-media-offset=*)
 137                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 138                                 export LIVE_MEDIA_OFFSET
 139                                 ;;
 140
 141                         live-media-path=*)
 142                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 143                                 export LIVE_MEDIA_PATH
 144                                 ;;
 145
 146                         live-media-timeout=*)
 147                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 148                                 export LIVE_MEDIA_TIMEOUT
 149                                 ;;
 150
 151                         locale=*|debian-installer/locale=*)
 152                                 LOCALE="${ARGUMENT#*=}"
 153                                 export LOCALE
 154                                 ;;
 155
 156                         module=*)
 157                                 MODULE="${ARGUMENT#module=}"
 158                                 export MODULE
 159                                 ;;
 160
 161                         netboot=*)
 162                                 NETBOOT="${ARGUMENT#netboot=}"
 163                                 export NETBOOT
 164                                 ;;
 165
 166                         nfsopts=*)
 167                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 168                                 export NFSOPTS
 169                                 ;;
 170
 171                         noaccessibility)
 172                                 NOACCESSIBILITY="Yes"
 173                                 export NOACCESSIBILITY
 174                                 ;;
 175
 176                         noapparmor)
 177                                 NOAPPARMOR="Yes"
 178                                 export NOAPPARMOR
 179                                 ;;
 180
 181                         noaptcdrom)
 182                                 NOAPTCDROM="Yes"
 183                                 export NOAPTCDROM
 184                                 ;;
 185
 186                         noautologin)
 187                                 NOAUTOLOGIN="Yes"
 188                                 export NOAUTOLOGIN
 189                                 ;;
 190
 191                         noxautologin)
 192                                 NOXAUTOLOGIN="Yes"
 193                                 export NOXAUTOLOGIN
 194                                 ;;
 195
 196                         noconsolekeyboard)
 197                                 NOCONSOLEKEYBOARD="Yes"
 198                                 export NOCONSOLEKEYBOARD
 199                                 ;;
 200
 201                         nofastboot)
 202                                 NOFASTBOOT="Yes"
 203                                 export NOFASTBOOT
 204                                 ;;
 205
 206                         nofstab)
 207                                 NOFSTAB="Yes"
 208                                 export NOFSTAB
 209                                 ;;
 210
 211                         nognomepanel)
 212                                 NOGNOMEPANEL="Yes"
 213                                 export NOGNOMEPANEL
 214                                 ;;
 215
 216                         nohosts)
 217                                 NOHOSTS="Yes"
 218                                 export NOHOSTS
 219                                 ;;
 220
 221                         nokpersonalizer)
 222                                 NOKPERSONALIZER="Yes"
 223                                 export NOKPERSONALIZER
 224                                 ;;
 225
 226                         nokwallet)
 227                                 NOKWALLET="Yes"
 228                                 export NOKWALLET
 229                                 ;;
 230
 231                         nolanguageselector)
 232                                 NOLANGUAGESELECTOR="Yes"
 233                                 export NOLANGUAGESELECTOR
 234                                 ;;
 235
 236                         nolocales)
 237                                 NOLOCALES="Yes"
 238                                 export NOLOCALES
 239                                 ;;
 240
 241                         nonetworking)
 242                                 NONETWORKING="Yes"
 243                                 export NONETWORKING
 244                                 ;;
 245
 246                         nopowermanagement)
 247                                 NOPOWERMANAGEMENT="Yes"
 248                                 export NOPOWERMANAGEMENT
 249                                 ;;
 250
 251                         noprogramcrashes)
 252                                 NOPROGRAMCRASHES="Yes"
 253                                 export NOPROGRAMCRASHES
 254                                 ;;
 255
 256                         norestrictedmanager)
 257                                 NORESTRICTEDMANAGER="Yes"
 258                                 export NORESTRICTEDMANAGER
 259                                 ;;
 260
 261                         nosudo)
 262                                 NOSUDO="Yes"
 263                                 export NOSUDO
 264                                 ;;
 265
 266                         noswap)
 267                                 NOSWAP="Yes"
 268                                 export NOSWAP
 269                                 ;;
 270
 271                         noupdatenotifier)
 272                                 NOUPDATENOTIFIER="Yes"
 273                                 export NOUPDATENOTIFIER
 274                                 ;;
 275
 276                         nouser)
 277                                 NOUSER="Yes"
 278                                 export NOUSER
 279                                 ;;
 280
 281                         noxautoconfig)
 282                                 NOXAUTOCONFIG="Yes"
 283                                 export NOXAUTOCONFIG
 284                                 ;;
 285
 286                         noxscreensaver)
 287                                 NOXSCREENSAVER="Yes"
 288                                 export NOXSCREENSAVER
 289                                 ;;
 290
 291                         persistent)
 292                                 PERSISTENT="Yes"
 293                                 export PERSISTENT
 294                                 ;;
 295
 296                         nopersistent)
 297                                 NOPERSISTENT="Yes"
 298                                 export NOPERSISTENT
 299                                 ;;
 300
 301                         preseed/file=*|file=*)
 302                                 LOCATION="${ARGUMENT#*=}"
 303                                 export LOCATION
 304                                 ;;
 305
 306                         nopreseed)
 307                                 NOPRESEED="Yes"
 308                                 export NOPRESEED
 309                                 ;;
 310
 311                         url=*)
 312                                 location="${ARGUMENT#url=}"
 313
 314                                 mount -n -o bind /sys /root/sys
 315                                 mount -n -o bind /proc /root/proc
 316                                 mount -n -o bind /dev /root/dev
 317
 318                                 mkdir -p /root/var/run/network
 319                                 chroot /root ifup -a
 320                                 chroot /root wget -P /tmp "${location}"
 321                                 chroot /root ifdown -a
 322
 323                                 umount /root/sys
 324                                 umount /root/proc
 325                                 umount /root/dev
 326
 327                                 LOCATION="/tmp/$(basename "${location}")"
 328                                 ;;
 329
 330                         */*=*)
 331                                 question="${ARGUMENT%%=*}"
 332                                 value="${ARGUMENT#*=}"
 333                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 334                                 export PRESEEDS
 335                                 ;;
 336
 337                         showmounts)
 338                                 SHOWMOUNTS="Yes"
 339                                 export SHOWMOUNTS
 340                                 ;;
 341
 342                         textonly)
 343                                 TEXTONLY="Yes"
 344                                 export TEXTONLY
 345                                 ;;
 346
 347                         timezone=*)
 348                                 TIMEZONE="${ARGUMENT#timezone=}"
 349                                 export TIMEZONE
 350                                 ;;
 351
 352                         notimezone)
 353                                 NOTIMEZONE="Yes"
 354                                 export NOTIMEZONE
 355                                 ;;
 356
 357                         todisk=*)
 358                                 TODISK="${ARGUMENT#todisk=}"
 359                                 export TODISK
 360                                 ;;
 361
 362                         toram)
 363                                 TORAM="Yes"
 364                                 export TORAM
 365                                 ;;
 366
 367                         toram=*)
 368                                 TORAM="Yes"
 369                                 MODULETORAM="${ARGUMENT#toram=}"
 370                                 export TORAM MODULETORAM
 371                                 ;;
 372
 373                         union=*)
 374                                 UNIONTYPE="${ARGUMENT#union=}"
 375                                 export UNIONTYPE
 376                                 ;;
 377
 378                         utc=*)
 379                                 UTC="${ARGUMENT#utc=}"
 380                                 export UTC
 381                                 ;;
 382
 383                         xdebconf)
 384                                 XDEBCONF="Yes"
 385                                 export XDEBCONF
 386                                 ;;
 387
 388                         xvideomode=*)
 389                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 390                                 export XVIDEOMODE
 391                                 ;;
 392                 esac
 393         done
 394
 395         # sort of compatibility with netboot.h from linux docs
 396         if [ -z "${NETBOOT}" ]
 397         then
 398                 if [ "${ROOT}" = "/dev/nfs" ]
 399                 then
 400                         NETBOOT="nfs"
 401                         export NETBOOT
 402                 elif [ "${ROOT}" = "/dev/cifs" ]
 403                 then
 404                         NETBOOT="cifs"
 405                         export NETBOOT
 406                 fi
 407         fi
 408
 409         if [ -z "${MODULE}" ]
 410         then
 411                 MODULE="filesystem"
 412                 export MODULE
 413         fi
 414
 415         if [ -z "${UNIONTYPE}" ]
 416         then
 417                 UNIONTYPE="unionfs"
 418                 export UNIONTYPE
 419         fi
 420 }
 421
 422 is_live_path ()
 423 {
 424         DIRECTORY="${1}"
 425
 426         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 427         then
 428                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 429                 do
 430                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 431                         then
 432                                 return 0
 433                         fi
 434                 done
 435         fi
 436
 437         return 1
 438 }
 439
 440 matches_uuid() {
 441     if [ "$IGNORE_UUID" ] || [ ! -e /conf/uuid.conf ]; then
 442         return 0
 443     fi
 444     path="$1"
 445     uuid="$(cat /conf/uuid.conf)"
 446     for try_uuid_file in "$mountpoint/.disk/casper-uuid"*; do
 447         [ -e "$try_uuid_file" ] || continue
 448         try_uuid="$(cat "$try_uuid_file")"
 449         if [ "$uuid" = "$try_uuid" ]; then
 450             return 0
 451         fi
 452     done
 453     return 1
 454 }
 455
 456 get_backing_device ()
 457 {
 458         case "${1}" in
 459                 *.squashfs|*.ext2|*.ext3)
 460                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}")
 461                         ;;
 462
 463                 *.dir)
 464                         echo "directory"
 465                         ;;
 466
 467                 *)
 468                         panic "Unrecognized live filesystem: ${1}"
 469                         ;;
 470         esac
 471 }
 472
 473 match_files_in_dir ()
 474 {
 475         # Does any files match pattern ${1} ?
 476         local pattern="${1}"
 477
 478         if [ "$(echo ${pattern})" != "${pattern}" ]
 479         then
 480                 return 0
 481         fi
 482
 483         return 1
 484 }
 485
 486 mount_images_in_directory ()
 487 {
 488         directory="${1}"
 489         rootmnt="${2}"
 490
 491         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 492                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 493                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 494                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 495         then
 496                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}"
 497         else
 498                 :
 499         fi
 500 }
 501
 502 is_nice_device ()
 503 {
 504         sysfs_path="${1#/sys}"
 505
 506         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"
 507         then
 508                 return 0
 509         fi
 510
 511         return 1
 512 }
 513
 514 is_supported_fs ()
 515 {
 516         # FIXME: do something better like the scan of supported filesystems
 517         fstype="${1}"
 518
 519         case ${fstype} in
 520                 vfat|iso9660|udf|ext2|ext3|ntfs)
 521                         return 0
 522                         ;;
 523         esac
 524
 525         return 1
 526 }
 527
 528 copy_live_to ()
 529 {
 530         copyfrom="${1}"
 531         copytodev="${2}"
 532         copyto="${copyfrom}_swap"
 533
 534         if [ -z "${MODULETORAM}" ]
 535         then
 536                 size=$(fs_size "" ${copyfrom} "used")
 537         else
 538                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 539
 540                 if [ -f "${MODULETORAMFILE}" ]
 541                 then
 542                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 543                 else
 544                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 545                         return 1
 546                 fi
 547         fi
 548
 549         if [ "${copytodev}" = "ram" ]
 550         then
 551                 # copying to ram:
 552                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
 553                 mount_options="-o size=${size}k"
 554                 free_string="memory"
 555                 fstype="tmpfs"
 556                 dev="/dev/shm"
 557         else
 558                 # it should be a writable block device
 559                 if [ -b "${copytodev}" ]
 560                 then
 561                         dev="${copytodev}"
 562                         free_string="space"
 563                         fstype=$(get_fstype "${dev}")
 564                         freespace=$(fs_size "${dev}")
 565                 else
 566                         [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
 567                         return 1
 568                 fi
 569         fi
 570
 571         if [ "${freespace}" -lt "${size}" ]
 572         then
 573                 [ "${quiet}" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 574                 return 1
 575         fi
 576
 577         # begin copying (or uncompressing)
 578         mkdir "${copyto}"
 579         echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 580         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 581
 582         if [ "${extension}" = "tgz" ]
 583         then
 584                 cd "${copyto}"
 585                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 586                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 587                 mount -r --move "${copyto}" "${rootmnt}"
 588                 cd "${OLDPWD}"
 589         else
 590                 if [ -n "${MODULETORAMFILE}" ]
 591                 then
 592                         cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 593                 else
 594                         cp -a ${copyfrom}/* ${copyto}   # "cp -a" from busybox also copies hidden files
 595                 fi
 596
 597                 livefs_root
 598                 umount ${copyfrom}
 599                 mount -r --move ${copyto} ${copyfrom}
 600         fi
 601
 602         rmdir ${copyto}
 603         return 0
 604 }
 605
 606 do_netmount ()
 607 {
 608         rc=1
 609
 610         modprobe "${MP_QUIET}" af_packet # For DHCP
 611
 612         udevtrigger
 613         udevsettle
 614
 615         ipconfig ${DEVICE} | tee /netboot.config
 616
 617         # source relevant ipconfig output
 618         OLDHOSTNAME=${HOSTNAME}
 619         . /tmp/net-${DEVICE}.conf
 620         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 621         export HOSTNAME
 622
 623         if [ "${NFSROOT}" = "auto" ]
 624         then
 625                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 626         fi
 627
 628         if [ -n "${FETCH}" ] && do_httpmount
 629         then
 630                 rc=0
 631                 return ${rc}
 632         fi
 633
 634         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 635         then
 636                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 637         fi
 638
 639         [ "${quiet}" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
 640
 641         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 642         then
 643                 rc=0
 644         elif do_nfsmount
 645         then
 646                 NETBOOT="nfs"
 647                 export NETBOOT
 648                 rc=0
 649         fi
 650
 651         [ "${quiet}" != "y" ] && log_end_msg
 652         return ${rc}
 653 }
 654
 655 do_httpmount ()
 656 {
 657         rc=1
 658         extension=$(echo "${FETCH}" | sed 's/\(.*\)\.\(.*\)/\2/')
 659
 660         case "${extension}" in
 661                 squashfs|tgz|tar)
 662                         [ "${quiet}" != "y" ] && log_begin_msg "Trying wget ${FETCH} -O ${mountpoint}/$(basename ${FETCH})"
 663                         mkdir -p "${mountpoint}/${LIVE_MEDIA_PATH}"
 664                         wget "${FETCH}" -O "${mountpoint}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 665                         [ ${?} -eq 0 ] && rc=0
 666                         [ "${extension}" = "tgz" ] && live_dest="ram"
 667                         ;;
 668
 669                 *)
 670                         [ "${quiet}" != "y" ] && log_begin_msg "Unrecognized archive extension for ${FETCH}"
 671         esac
 672
 673         return ${rc}
 674 }
 675
 676 do_nfsmount ()
 677 {
 678         rc=1
 679
 680         modprobe "${MP_QUIET}" nfs
 681
 682         if [ -z "${NFSOPTS}" ]
 683         then
 684                 NFSOPTS=""
 685         fi
 686
 687         [ "${quiet}" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 688
 689         # FIXME: This for loop is an ugly HACK round an nfs bug
 690         for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13
 691         do
 692                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 693                 sleep 1
 694         done
 695
 696         return ${rc}
 697 }
 698
 699 do_cifsmount ()
 700 {
 701         rc=1
 702
 703         if [ -x "/sbin/mount.cifs" ]
 704         then
 705                 if [ -z "${NFSOPTS}" ]
 706                 then
 707                         CIFSOPTS="-ouser=root,password="
 708                 else
 709                         CIFSOPTS="${NFSOPTS}"
 710                 fi
 711
 712                 [ "${quiet}" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 713                 modprobe "${MP_QUIET}" cifs
 714
 715                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 716                 then
 717                         rc=0
 718                 fi
 719         fi
 720
 721         return ${rc}
 722 }
 723
 724 do_snap_copy ()
 725 {
 726         fromdev="${1}"
 727         todir="${2}"
 728         snap_type="${3}"
 729         size=$(fs_size "${fromdev}" "" "used")
 730
 731         if [ -b "${fromdev}" ]
 732         then
 733                 # look for free mem
 734                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 735                 then
 736                         todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
 737                         freespace=$(df -k  | grep -s ${todev} | awk '{print $4}')
 738                 else
 739                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
 740                 fi
 741
 742                 tomount="/mnt/tmpsnap"
 743
 744                 if [ ! -d "${tomount}" ]
 745                 then
 746                         mkdir -p "${tomount}"
 747                 fi
 748
 749                 fstype=$(get_fstype "${fromdev}")
 750
 751                 if [ -n "${fstype}" ]
 752                 then
 753                         # Copying stuff...
 754                         mount -t "${fstype}" -o ro,noatime,nodiratime "${fromdev}" "${tomount}"
 755                         cp -a "${tomount}"/* ${todir}
 756                         umount "${tomount}"
 757                 else
 758                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 759                 fi
 760
 761                 rmdir "${tomount}"
 762
 763                 if echo ${fromdev} | grep -qs loop
 764                 then
 765                         losetup -d "${fromdev}"
 766                 fi
 767
 768                 return 0
 769         else
 770                 return 1
 771
 772                 [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 773         fi
 774 }
 775
 776 try_snap ()
 777 {
 778         # Look for ${snap_label}.* in block devices and copy the contents to ${snap_mount}
 779         # and remember the device and filename for resync on exit in live-initramfs.init
 780
 781         snap_label="${1}"
 782         snap_mount="${2}"
 783         snap_type="${3}"
 784         snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3")
 785
 786         if [ ! -z "${snapdata}" ]
 787         then
 788                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 789                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 790                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 791
 792                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\)'
 793                 then
 794                         # squashfs or ext2/ext3 snapshot
 795                         dev=$(get_backing_device "${snapback}/${snapfile}")
 796
 797                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 798                         then
 799                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 800                                 return 1
 801                         fi
 802                 else
 803                         # cpio.gz snapshot
 804                         if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null)
 805                         then
 806                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 807                                 return 1
 808                         fi
 809                 fi
 810
 811                 umount "${snapback}"
 812         else
 813                 dev=$(find_cow_device "${snap_label}")
 814
 815                 if [ -b ${dev} ]
 816                 then
 817                         if echo "${dev}" | grep -qs loop
 818                         then
 819                                 # strange things happens, user confused?
 820                                 snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 821                                 snapfile=$(basename ${snaploop})
 822                                 snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 823                         else
 824                                 snapdev="${dev}"
 825                         fi
 826
 827                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 828                         then
 829                                 log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 830                                 return 1
 831                         else
 832                                 if [ -n "${snapfile}" ]
 833                                 then
 834                                         # it was a loop device, user confused
 835                                         umount ${snapdev}
 836                                 fi
 837                         fi
 838                 else
 839                         log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 840                         return 1
 841                 fi
 842         fi
 843
 844         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
 845         return 0
 846 }
 847
 848 setup_unionfs ()
 849 {
 850         image_directory="${1}"
 851         rootmnt="${2}"
 852
 853         modprobe "${MP_QUIET}" -b ${UNIONTYPE}
 854
 855         # run-init can't deal with images in a subdir, but we're going to
 856         # move all of these away before it runs anyway.  No, we're not,
 857         # put them in / since move-mounting them into / breaks mono and
 858         # some other apps.
 859
 860         croot="/"
 861
 862         # Let's just mount the read-only file systems first
 863         rofsstring=""
 864         rofslist=""
 865         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
 866
 867         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
 868         then
 869                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
 870                 roopt="nfsro"
 871         else
 872                 roopt="ro"
 873         fi
 874
 875         # Read image names from ${MODULE}.module if it exists
 876         if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
 877         then
 878                 for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
 879                 do
 880                         image_string="${image_string} ${image_directory}/${IMAGE}"
 881                 done
 882         elif [ -e "${image_directory}/${MODULE}.module" ]
 883         then
 884                 for IMAGE in $(cat ${image_directory}/${MODULE}.module)
 885                 do
 886                         image_string="${image_string} ${image_directory}/${IMAGE}"
 887                 done
 888         else
 889                 # ${MODULE}.module does not exist, create a list of images
 890                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 891                 do
 892                         for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
 893                         do
 894                                 if [ -e "${IMAGE}" ]
 895                                 then
 896                                         image_string="${image_string} ${IMAGE}"
 897                                 fi
 898                         done
 899                 done
 900
 901                 # Now sort the list
 902                 image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
 903         fi
 904
 905         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
 906
 907         mkdir -p "${croot}"
 908
 909         for image in ${image_string}
 910         do
 911                 imagename=$(basename "${image}")
 912
 913                 if [ -d "${image}" ]
 914                 then
 915                         # it is a plain directory: do nothing
 916                         rofsstring="${image}=${roopt}:${rofsstring}"
 917                         rofslist="${image} ${rofslist}"
 918                 elif [ -f "${image}" ]
 919                 then
 920                         backdev=$(get_backing_device "${image}")
 921                         fstype=$(get_fstype "${backdev}")
 922
 923                         if [ "${fstype}" = "unknown" ]
 924                         then
 925                                 panic "Unknown file system type on ${backdev} (${image})"
 926                         fi
 927
 928                         mkdir -p "${croot}/${imagename}"
 929                         echo "debug: Can not mount backdev ${backdev} (image = ${image}) on croot/imagename ${croot}/${imagename}"
 930                         mount -t "${fstype}" -o ro,noatime,nodiratime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
 931                 fi
 932         done
 933
 934         rofsstring=${rofsstring%:}
 935
 936         mkdir -p /cow
 937         cowdevice="tmpfs"
 938         cow_fstype="tmpfs"
 939
 940         # Looking for "${root_persistence}" device or file
 941         if [ -n "${PERSISTENT}" ]
 942         then
 943                 cowprobe=$(find_cow_device "${root_persistence}")
 944
 945                 if [ -b "${cowprobe}" ]
 946                 then
 947                         cowdevice=${cowprobe}
 948                         cow_fstype=$(get_fstype "${cowprobe}")
 949                 else
 950                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent medium"
 951                 fi
 952         fi
 953
 954         mount ${cowdevice} -t ${cow_fstype} -o rw,noatime,nodiratime /cow || panic "Can not mount ${cowdevice} on /cow"
 955
 956         mount -t ${UNIONTYPE} -o noatime,nodiratime,dirs=/cow=rw:${rofsstring} ${UNIONTYPE} "${rootmnt}" || panic "${UNIONTYPE} mount failed"
 957
 958         # Adding other custom mounts
 959         if [ -n "${PERSISTENT}" ]
 960         then
 961                 # directly mount /home
 962                 # FIXME: add a custom mounts configurable system
 963                 homecow=$(find_cow_device "${home_persistence}" )
 964
 965                 if [ -b "${homecow}" ]
 966                 then
 967                         mount -t $(get_fstype "${homecow}") -o rw,noatime,nodiratime "${homecow}" "${rootmnt}/home"
 968                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
 969                 else
 970                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
 971                 fi
 972
 973                 # Look for other snapshots to copy in
 974                 try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
 975                 try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
 976         fi
 977
 978         if [ -n "${SHOWMOUNTS}" ]
 979         then
 980                 for d in ${rofslist}
 981                 do
 982                         mkdir -p "${rootmnt}/live/${d##*/}"
 983
 984                         case d in
 985                                 *.dir)
 986                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
 987                                         ;;
 988
 989                                 *)
 990                                         mount --move "${d}" "${rootmnt}/live/${d##*/}"
 991                                         ;;
 992                         esac
 993                 done
 994         fi
 995
 996         # shows cow fs on /cow for use by live-snapshot
 997         mkdir -p "${rootmnt}/live/cow"
 998         mount -o move /cow "${rootmnt}/live/cow"
 999 }
1000
1001 check_dev ()
1002 {
1003         sysdev="${1}"
1004         devname="${2}"
1005         skip_uuid_check="${3}"
1006
1007         if [ -z "${devname}" ]
1008         then
1009                 devname=$(sys2dev "${sysdev}")
1010         fi
1011
1012         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1013         then
1014                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1015                 devname="${loopdevname}"
1016         fi
1017
1018         fstype=$(get_fstype "${devname}")
1019
1020         if is_supported_fs ${fstype}
1021         then
1022                 mount -t ${fstype} -o ro,noatime,nodiratime "${devname}" ${mountpoint} || continue
1023
1024                 if is_live_path ${mountpoint}
1025                 if is_live_path $mountpoint && \
1026                         ([ "$skip_uuid_check" ] || matches_uuid $mountpoint); then
1027                         echo ${mountpoint}
1028                         return 0
1029                 else
1030                         umount ${mountpoint}
1031                 fi
1032         fi
1033
1034         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1035         then
1036                 losetup -d "${loopdevname}"
1037         fi
1038
1039         return 1
1040 }
1041
1042 find_livefs ()
1043 {
1044         timeout="${1}"
1045
1046         # first look at the one specified in the command line
1047         if [ ! -z "${LIVE_MEDIA}" ]
1048         then
1049                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1050                 then
1051                         return 0
1052                 fi
1053         fi
1054
1055         # don't start autodetection before timeout has expired
1056         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1057         then
1058                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1059                 then
1060                         return 1
1061                 fi
1062         fi
1063
1064         # or do the scan of block devices
1065         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram)
1066         do
1067                 devname=$(sys2dev "${sysblock}")
1068                 fstype=$(get_fstype "${devname}")
1069
1070                 if /lib/udev/cdrom_id ${devname} > /dev/null
1071                 then
1072                         if check_dev "null" "${devname}"
1073                         then
1074                                 return 0
1075                         fi
1076                 elif is_nice_device "${sysblock}"
1077                 then
1078                         for dev in $(subdevices "${sysblock}")
1079                         do
1080                                 if check_dev "${dev}"
1081                                 then
1082                                         return 0
1083                                 fi
1084                         done
1085                 elif [ "${fstype}" = "squashfs" -o \
1086                         "${fstype}" = "ext2" -o \
1087                         "${fstype}" = "ext3" ]
1088                 then
1089                         # This is an ugly hack situation, the block device has
1090                         # an image directly on it.  It's hopefully
1091                         # live-initramfs, so take it and run with it.
1092                         ln -s "${devname}" "${devname}.${fstype}"
1093                         echo "${devname}.${fstype}"
1094                         return 0
1095                 fi
1096         done
1097
1098         return 1
1099 }
1100
1101 pulsate ()
1102 {
1103         if [ -x /sbin/usplash_write ]
1104         then
1105                 /sbin/usplash_write "PULSATE"
1106         fi
1107 }
1108
1109 set_usplash_timeout ()
1110 {
1111         if [ -x /sbin/usplash_write ]
1112         then
1113                 /sbin/usplash_write "TIMEOUT 120"
1114         fi
1115 }
1116
1117 mountroot ()
1118 {
1119         exec 6>&1
1120         exec 7>&2
1121         exec > live.log
1122         exec 2>&1
1123
1124         Arguments
1125
1126         set_usplash_timeout
1127         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-premount"
1128         pulsate
1129         run_scripts /scripts/live-premount
1130         [ "${quiet}" != "y" ] && log_end_msg
1131
1132         # Needed here too because some things (*cough* udev *cough*)
1133         # changes the timeout
1134
1135         set_usplash_timeout
1136
1137         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ]
1138         then
1139                 if do_netmount
1140                 then
1141                         livefs_root="${mountpoint}"
1142                 else
1143                         panic "Unable to find a live file system on the network"
1144                 fi
1145         else
1146                 # Scan local devices for the image
1147                 for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
1148                 do
1149                         livefs_root=$(find_livefs ${i})
1150
1151                         if [ -n "${livefs_root}" ]
1152                         then
1153                                 break
1154                         fi
1155
1156                         sleep 1
1157                 done
1158         fi
1159
1160         if [ -z "${livefs_root}" ]
1161         then
1162                 panic "Unable to find a medium containing a live file system"
1163         fi
1164
1165         if [ "${TORAM}" ]
1166         then
1167                 live_dest="ram"
1168         elif [ "${TODISK}" ]
1169         then
1170                 live_dest="${TODISK}"
1171         fi
1172
1173         if [ "${live_dest}" ]
1174         then
1175                 log_begin_msg "Copying live media to ${live_dest}"
1176                 copy_live_to "${livefs_root}" "${live_dest}"
1177                 log_end_msg
1178         fi
1179
1180         if [ -n "${MODULETORAMFILE}" ]
1181         then
1182                 setup_unionfs "${livefs_root}" "${rootmnt}"
1183         else
1184                 mount_images_in_directory "${livefs_root}" "${rootmnt}"
1185         fi
1186
1187         log_end_msg
1188
1189         maybe_break live-bottom
1190         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-bottom"
1191
1192         pulsate
1193         run_scripts /scripts/live-bottom
1194         [ "${quiet}" != "y" ] && log_end_msg
1195
1196         exec 1>&6 6>&-
1197         exec 2>&7 7>&-
1198         cp live.log "${rootmnt}/var/log/"
1199 }