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