scripts/live

   1 #!/bin/sh
   2
   3 # set -e
   4
   5 export PATH="/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin"
   6
   7 echo "/root/lib" >> /etc/ld.so.conf
   8 echo "/root/usr/lib" >> /etc/ld.so.conf
   9
  10 mountpoint="/live/image"
  11 LIVE_MEDIA_PATH="live"
  12
  13 root_persistence="live-rw"
  14 home_persistence="home-rw"
  15 root_snapshot_label="live-sn"
  16 home_snapshot_label="home-sn"
  17
  18 USERNAME="user"
  19 USERFULLNAME="Live user"
  20 HOSTNAME="host"
  21
  22 mkdir -p "${mountpoint}"
  23
  24 [ -f /etc/live.conf ] && . /etc/live.conf
  25 export USERNAME USERFULLNAME HOSTNAME
  26
  27 . /scripts/live-helpers
  28
  29 if [ ! -f /live.vars ]
  30 then
  31         touch /live.vars
  32 fi
  33
  34 Arguments ()
  35 {
  36         PRESEEDS=""
  37
  38         for ARGUMENT in $(cat /proc/cmdline)
  39         do
  40                 case "${ARGUMENT}" in
  41                         access=*)
  42                                 ACCESS="${ARGUMENT#access=}"
  43                                 export ACCESS
  44                                 ;;
  45
  46                         console=*)
  47                                 DEFCONSOLE="${ARGUMENT#*=}"
  48                                 export DEFCONSOLE
  49                                 ;;
  50
  51                         debug)
  52                                 DEBUG="Yes"
  53                                 export DEBUG
  54
  55                                 set -x
  56                                 ;;
  57
  58                         fetch=*)
  59                                 FETCH="${ARGUMENT#fetch=}"
  60                                 export FETCH
  61                                 ;;
  62
  63                         hostname=*)
  64                                 HOSTNAME="${ARGUMENT#hostname=}"
  65                                 LIVECONF="changed"
  66                                 export HOSTNAME LIVECONF
  67                                 ;;
  68
  69                         username=*)
  70                                 USERNAME="${ARGUMENT#username=}"
  71                                 LIVECONF="changed"
  72                                 export USERNAME LIVECONF
  73                                 ;;
  74
  75                         userfullname=*)
  76                                 USERFULLNAME="${ARGUMENT#userfullname=}"
  77                                 LIVECONF="changed"
  78                                 export USERFULLNAME LIVECONF
  79                                 ;;
  80
  81                         ignore_uuid)
  82                                 IGNORE_UUID="Yes"
  83                                 export IGNORE_UUID
  84                                 ;;
  85
  86                         ip=*)
  87                                 STATICIP="${ARGUMENT#ip=}"
  88
  89                                 if [ -z "${STATICIP}" ]
  90                                 then
  91                                         STATICIP="frommedia"
  92                                 fi
  93
  94                                 export STATICIP
  95                                 ;;
  96
  97                         keyb=*|kbd-chooser/method=*)
  98                                 KBD="${ARGUMENT#*=}"
  99                                 export KBD
 100                                 ;;
 101
 102                         klayout=*|console-setup/layoutcode=*)
 103                                 KLAYOUT="${ARGUMENT#*=}"
 104                                 export KLAYOUT
 105                                 ;;
 106
 107                         kvariant=*|console-setup/variantcode=*)
 108                                 KVARIANT="${ARGUMENT#*=}"
 109                                 export KVARIANT
 110                                 ;;
 111
 112                         kmodel=*|console-setup/modelcode=*)
 113                                 KMODEL="${ARGUMENT#*=}"
 114                                 export KMODEL
 115                                 ;;
 116
 117                         koptions=*)
 118                                 KOPTIONS="${ARGUMENT#koptions=}"
 119                                 export KOPTIONS
 120                                 ;;
 121
 122                         live-getty)
 123                                 LIVE_GETTY="1"
 124                                 export LIVE_GETTY
 125                                 ;;
 126
 127                         live-media=*|bootfrom=*)
 128                                 LIVE_MEDIA="${ARGUMENT#*=}"
 129                                 export LIVE_MEDIA
 130                                 ;;
 131
 132                         live-media-encryption=*|encryption=*)
 133                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 134                                 export LIVE_MEDIA_ENCRYPTION
 135                                 ;;
 136
 137                         live-media-offset=*)
 138                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 139                                 export LIVE_MEDIA_OFFSET
 140                                 ;;
 141
 142                         live-media-path=*)
 143                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 144                                 export LIVE_MEDIA_PATH
 145                                 ;;
 146
 147                         live-media-timeout=*)
 148                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 149                                 export LIVE_MEDIA_TIMEOUT
 150                                 ;;
 151
 152                         locale=*|debian-installer/locale=*)
 153                                 LOCALE="${ARGUMENT#*=}"
 154                                 export LOCALE
 155                                 ;;
 156
 157                         module=*)
 158                                 MODULE="${ARGUMENT#module=}"
 159                                 export MODULE
 160                                 ;;
 161
 162                         netboot=*)
 163                                 NETBOOT="${ARGUMENT#netboot=}"
 164                                 export NETBOOT
 165                                 ;;
 166
 167                         nfsopts=*)
 168                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 169                                 export NFSOPTS
 170                                 ;;
 171
 172                         nfscow=*)
 173                                 NFS_COW="${ARGUMENT#nfscow=}"
 174                                 export NFS_COW
 175                                 ;;
 176
 177                         noaccessibility)
 178                                 NOACCESSIBILITY="Yes"
 179                                 export NOACCESSIBILITY
 180                                 ;;
 181
 182                         noapparmor)
 183                                 NOAPPARMOR="Yes"
 184                                 export NOAPPARMOR
 185                                 ;;
 186
 187                         noaptcdrom)
 188                                 NOAPTCDROM="Yes"
 189                                 export NOAPTCDROM
 190                                 ;;
 191
 192                         noautologin)
 193                                 NOAUTOLOGIN="Yes"
 194                                 export NOAUTOLOGIN
 195                                 ;;
 196
 197                         noxautologin)
 198                                 NOXAUTOLOGIN="Yes"
 199                                 export NOXAUTOLOGIN
 200                                 ;;
 201
 202                         noconsolekeyboard)
 203                                 NOCONSOLEKEYBOARD="Yes"
 204                                 export NOCONSOLEKEYBOARD
 205                                 ;;
 206
 207                         nofastboot)
 208                                 NOFASTBOOT="Yes"
 209                                 export NOFASTBOOT
 210                                 ;;
 211
 212                         nofstab)
 213                                 NOFSTAB="Yes"
 214                                 export NOFSTAB
 215                                 ;;
 216
 217                         nognomepanel)
 218                                 NOGNOMEPANEL="Yes"
 219                                 export NOGNOMEPANEL
 220                                 ;;
 221
 222                         nohosts)
 223                                 NOHOSTS="Yes"
 224                                 export NOHOSTS
 225                                 ;;
 226
 227                         nokpersonalizer)
 228                                 NOKPERSONALIZER="Yes"
 229                                 export NOKPERSONALIZER
 230                                 ;;
 231
 232                         nokwallet)
 233                                 NOKWALLET="Yes"
 234                                 export NOKWALLET
 235                                 ;;
 236
 237                         nolanguageselector)
 238                                 NOLANGUAGESELECTOR="Yes"
 239                                 export NOLANGUAGESELECTOR
 240                                 ;;
 241
 242                         nolocales)
 243                                 NOLOCALES="Yes"
 244                                 export NOLOCALES
 245                                 ;;
 246
 247                         nonetworking)
 248                                 NONETWORKING="Yes"
 249                                 export NONETWORKING
 250                                 ;;
 251
 252                         nopowermanagement)
 253                                 NOPOWERMANAGEMENT="Yes"
 254                                 export NOPOWERMANAGEMENT
 255                                 ;;
 256
 257                         noprogramcrashes)
 258                                 NOPROGRAMCRASHES="Yes"
 259                                 export NOPROGRAMCRASHES
 260                                 ;;
 261
 262                         norestrictedmanager)
 263                                 NORESTRICTEDMANAGER="Yes"
 264                                 export NORESTRICTEDMANAGER
 265                                 ;;
 266
 267                         nosudo)
 268                                 NOSUDO="Yes"
 269                                 export NOSUDO
 270                                 ;;
 271
 272                         noswap)
 273                                 NOSWAP="Yes"
 274                                 export NOSWAP
 275                                 ;;
 276
 277                         noupdatenotifier)
 278                                 NOUPDATENOTIFIER="Yes"
 279                                 export NOUPDATENOTIFIER
 280                                 ;;
 281
 282                         nouser)
 283                                 NOUSER="Yes"
 284                                 export NOUSER
 285                                 ;;
 286
 287                         noxautoconfig)
 288                                 NOXAUTOCONFIG="Yes"
 289                                 export NOXAUTOCONFIG
 290                                 ;;
 291
 292                         noxscreensaver)
 293                                 NOXSCREENSAVER="Yes"
 294                                 export NOXSCREENSAVER
 295                                 ;;
 296
 297                         persistent)
 298                                 PERSISTENT="Yes"
 299                                 export PERSISTENT
 300                                 ;;
 301
 302                         nopersistent)
 303                                 NOPERSISTENT="Yes"
 304                                 export NOPERSISTENT
 305                                 ;;
 306
 307                         preseed/file=*|file=*)
 308                                 LOCATION="${ARGUMENT#*=}"
 309                                 export LOCATION
 310                                 ;;
 311
 312                         nopreseed)
 313                                 NOPRESEED="Yes"
 314                                 export NOPRESEED
 315                                 ;;
 316
 317                         url=*)
 318                                 location="${ARGUMENT#url=}"
 319
 320                                 mount -n -o bind /sys /root/sys
 321                                 mount -n -o bind /proc /root/proc
 322                                 mount -n -o bind /dev /root/dev
 323
 324                                 mkdir -p /root/var/run/network
 325                                 chroot /root ifup -a
 326                                 chroot /root wget -P /tmp "${location}"
 327                                 chroot /root ifdown -a
 328
 329                                 umount /root/sys
 330                                 umount /root/proc
 331                                 umount /root/dev
 332
 333                                 LOCATION="/tmp/$(basename "${location}")"
 334                                 ;;
 335
 336                         */*=*)
 337                                 question="${ARGUMENT%%=*}"
 338                                 value="${ARGUMENT#*=}"
 339                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 340                                 export PRESEEDS
 341                                 ;;
 342
 343                         showmounts)
 344                                 SHOWMOUNTS="Yes"
 345                                 export SHOWMOUNTS
 346                                 ;;
 347
 348                         textonly)
 349                                 TEXTONLY="Yes"
 350                                 export TEXTONLY
 351                                 ;;
 352
 353                         timezone=*)
 354                                 TIMEZONE="${ARGUMENT#timezone=}"
 355                                 export TIMEZONE
 356                                 ;;
 357
 358                         notimezone)
 359                                 NOTIMEZONE="Yes"
 360                                 export NOTIMEZONE
 361                                 ;;
 362
 363                         todisk=*)
 364                                 TODISK="${ARGUMENT#todisk=}"
 365                                 export TODISK
 366                                 ;;
 367
 368                         toram)
 369                                 TORAM="Yes"
 370                                 export TORAM
 371                                 ;;
 372
 373                         toram=*)
 374                                 TORAM="Yes"
 375                                 MODULETORAM="${ARGUMENT#toram=}"
 376                                 export TORAM MODULETORAM
 377                                 ;;
 378
 379                         exposedroot)
 380                                 EXPOSED_ROOT="Yes"
 381                                 export EXPOSED_ROOT
 382                                 ;;
 383
 384                         union=*)
 385                                 UNIONTYPE="${ARGUMENT#union=}"
 386                                 export UNIONTYPE
 387                                 ;;
 388
 389                         utc=*)
 390                                 UTC="${ARGUMENT#utc=}"
 391                                 export UTC
 392                                 ;;
 393
 394                         xdebconf)
 395                                 XDEBCONF="Yes"
 396                                 export XDEBCONF
 397                                 ;;
 398
 399                         xvideomode=*)
 400                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 401                                 export XVIDEOMODE
 402                                 ;;
 403                 esac
 404         done
 405
 406         # sort of compatibility with netboot.h from linux docs
 407         if [ -z "${NETBOOT}" ]
 408         then
 409                 if [ "${ROOT}" = "/dev/nfs" ]
 410                 then
 411                         NETBOOT="nfs"
 412                         export NETBOOT
 413                 elif [ "${ROOT}" = "/dev/cifs" ]
 414                 then
 415                         NETBOOT="cifs"
 416                         export NETBOOT
 417                 fi
 418         fi
 419
 420         if [ -z "${MODULE}" ]
 421         then
 422                 MODULE="filesystem"
 423                 export MODULE
 424         fi
 425
 426         if [ -z "${UNIONTYPE}" ]
 427         then
 428                 UNIONTYPE="unionfs"
 429                 export UNIONTYPE
 430         fi
 431 }
 432
 433 is_live_path ()
 434 {
 435         DIRECTORY="${1}"
 436
 437         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 438         then
 439                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 440                 do
 441                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 442                         then
 443                                 return 0
 444                         fi
 445                 done
 446         fi
 447
 448         return 1
 449 }
 450
 451 matches_uuid ()
 452 {
 453         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 454         then
 455                 return 0
 456         fi
 457
 458         path="${1}"
 459         uuid="$(cat /conf/uuid.conf)"
 460
 461         for try_uuid_file in "${mountpoint}/.disk/casper-uuid"*
 462         do
 463                 [ -e "${try_uuid_file}" ] || continue
 464
 465                 try_uuid="$(cat "${try_uuid_file}")"
 466
 467                 if [ "${uuid}" = "${try_uuid}" ]
 468                 then
 469                         return 0
 470                 fi
 471         done
 472
 473         return 1
 474 }
 475
 476 get_backing_device ()
 477 {
 478         case "${1}" in
 479                 *.squashfs|*.ext2|*.ext3)
 480                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}")
 481                         ;;
 482
 483                 *.dir)
 484                         echo "directory"
 485                         ;;
 486
 487                 *)
 488                         panic "Unrecognized live filesystem: ${1}"
 489                         ;;
 490         esac
 491 }
 492
 493 match_files_in_dir ()
 494 {
 495         # Does any files match pattern ${1} ?
 496         local pattern="${1}"
 497
 498         if [ "$(echo ${pattern})" != "${pattern}" ]
 499         then
 500                 return 0
 501         fi
 502
 503         return 1
 504 }
 505
 506 mount_images_in_directory ()
 507 {
 508         directory="${1}"
 509         rootmnt="${2}"
 510
 511         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 512                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 513                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 514                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 515         then
 516                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}"
 517         else
 518                 :
 519         fi
 520 }
 521
 522 is_nice_device ()
 523 {
 524         sysfs_path="${1#/sys}"
 525
 526         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"
 527         then
 528                 return 0
 529         fi
 530
 531         return 1
 532 }
 533
 534 is_supported_fs ()
 535 {
 536         # FIXME: do something better like the scan of supported filesystems
 537         fstype="${1}"
 538
 539         case ${fstype} in
 540                 vfat|iso9660|udf|ext2|ext3|ntfs)
 541                         return 0
 542                         ;;
 543         esac
 544
 545         return 1
 546 }
 547
 548 copy_live_to ()
 549 {
 550         copyfrom="${1}"
 551         copytodev="${2}"
 552         copyto="${copyfrom}_swap"
 553
 554         if [ -z "${MODULETORAM}" ]
 555         then
 556                 size=$(fs_size "" ${copyfrom} "used")
 557         else
 558                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 559
 560                 if [ -f "${MODULETORAMFILE}" ]
 561                 then
 562                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 563                 else
 564                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 565                         return 1
 566                 fi
 567         fi
 568
 569         if [ "${copytodev}" = "ram" ]
 570         then
 571                 # copying to ram:
 572                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
 573                 mount_options="-o size=${size}k"
 574                 free_string="memory"
 575                 fstype="tmpfs"
 576                 dev="/dev/shm"
 577         else
 578                 # it should be a writable block device
 579                 if [ -b "${copytodev}" ]
 580                 then
 581                         dev="${copytodev}"
 582                         free_string="space"
 583                         fstype=$(get_fstype "${dev}")
 584                         freespace=$(fs_size "${dev}")
 585                 else
 586                         [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
 587                         return 1
 588                 fi
 589         fi
 590
 591         if [ "${freespace}" -lt "${size}" ]
 592         then
 593                 [ "${quiet}" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 594                 return 1
 595         fi
 596
 597         # begin copying (or uncompressing)
 598         mkdir "${copyto}"
 599         echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 600         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 601
 602         if [ "${extension}" = "tgz" ]
 603         then
 604                 cd "${copyto}"
 605                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 606                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 607                 mount -r --move "${copyto}" "${rootmnt}"
 608                 cd "${OLDPWD}"
 609         else
 610                 if [ -n "${MODULETORAMFILE}" ]
 611                 then
 612                         cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 613                 else
 614                         cp -a ${copyfrom}/* ${copyto}   # "cp -a" from busybox also copies hidden files
 615                 fi
 616
 617                 livefs_root
 618                 umount ${copyfrom}
 619                 mount -r --move ${copyto} ${copyfrom}
 620         fi
 621
 622         rmdir ${copyto}
 623         return 0
 624 }
 625
 626 do_netmount ()
 627 {
 628         rc=1
 629
 630         modprobe -q af_packet # For DHCP
 631
 632         udevtrigger
 633         udevsettle
 634
 635         ipconfig ${DEVICE} | tee /netboot.config
 636
 637         # source relevant ipconfig output
 638         OLDHOSTNAME=${HOSTNAME}
 639         . /tmp/net-${DEVICE}.conf
 640         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 641         export HOSTNAME
 642
 643         if [ "${NFSROOT}" = "auto" ]
 644         then
 645                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 646         fi
 647
 648         if [ -n "${FETCH}" ] && do_httpmount
 649         then
 650                 rc=0
 651                 return ${rc}
 652         fi
 653
 654         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 655         then
 656                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 657         fi
 658
 659         [ "${quiet}" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
 660
 661         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 662         then
 663                 rc=0
 664         elif do_nfsmount
 665         then
 666                 NETBOOT="nfs"
 667                 export NETBOOT
 668                 rc=0
 669         fi
 670
 671         [ "${quiet}" != "y" ] && log_end_msg
 672         return ${rc}
 673 }
 674
 675 do_httpmount ()
 676 {
 677         rc=1
 678         extension=$(echo "${FETCH}" | sed 's/\(.*\)\.\(.*\)/\2/')
 679
 680         case "${extension}" in
 681                 squashfs|tgz|tar)
 682                         [ "${quiet}" != "y" ] && log_begin_msg "Trying wget ${FETCH} -O ${mountpoint}/$(basename ${FETCH})"
 683                         mkdir -p "${mountpoint}/${LIVE_MEDIA_PATH}"
 684                         wget "${FETCH}" -O "${mountpoint}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 685                         [ ${?} -eq 0 ] && rc=0
 686                         [ "${extension}" = "tgz" ] && live_dest="ram"
 687                         ;;
 688
 689                 *)
 690                         [ "${quiet}" != "y" ] && log_begin_msg "Unrecognized archive extension for ${FETCH}"
 691         esac
 692
 693         return ${rc}
 694 }
 695
 696 do_nfsmount ()
 697 {
 698         rc=1
 699
 700         modprobe -q nfs
 701
 702         if [ -z "${NFSOPTS}" ]
 703         then
 704                 NFSOPTS=""
 705         fi
 706
 707         [ "${quiet}" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 708
 709         # FIXME: This for loop is an ugly HACK round an nfs bug
 710         for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13
 711         do
 712                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 713                 sleep 1
 714         done
 715
 716         return ${rc}
 717 }
 718
 719 do_cifsmount ()
 720 {
 721         rc=1
 722
 723         if [ -x "/sbin/mount.cifs" ]
 724         then
 725                 if [ -z "${NFSOPTS}" ]
 726                 then
 727                         CIFSOPTS="-ouser=root,password="
 728                 else
 729                         CIFSOPTS="${NFSOPTS}"
 730                 fi
 731
 732                 [ "${quiet}" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 733                 modprobe -q cifs
 734
 735                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 736                 then
 737                         rc=0
 738                 fi
 739         fi
 740
 741         return ${rc}
 742 }
 743
 744 do_snap_copy ()
 745 {
 746         fromdev="${1}"
 747         todir="${2}"
 748         snap_type="${3}"
 749         size=$(fs_size "${fromdev}" "" "used")
 750
 751         if [ -b "${fromdev}" ]
 752         then
 753                 # look for free mem
 754                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 755                 then
 756                         todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
 757                         freespace=$(df -k  | grep -s ${todev} | awk '{print $4}')
 758                 else
 759                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
 760                 fi
 761
 762                 tomount="/mnt/tmpsnap"
 763
 764                 if [ ! -d "${tomount}" ]
 765                 then
 766                         mkdir -p "${tomount}"
 767                 fi
 768
 769                 fstype=$(get_fstype "${fromdev}")
 770
 771                 if [ -n "${fstype}" ]
 772                 then
 773                         # Copying stuff...
 774                         mount -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
 775                         cp -a "${tomount}"/* ${todir}
 776                         umount "${tomount}"
 777                 else
 778                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 779                 fi
 780
 781                 rmdir "${tomount}"
 782
 783                 if echo ${fromdev} | grep -qs loop
 784                 then
 785                         losetup -d "${fromdev}"
 786                 fi
 787
 788                 return 0
 789         else
 790                 return 1
 791
 792                 [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 793         fi
 794 }
 795
 796 try_snap ()
 797 {
 798         # Look for ${snap_label}.* in block devices and copy the contents to ${snap_mount}
 799         # and remember the device and filename for resync on exit in live-initramfs.init
 800
 801         snap_label="${1}"
 802         snap_mount="${2}"
 803         snap_type="${3}"
 804         snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3")
 805
 806         if [ ! -z "${snapdata}" ]
 807         then
 808                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 809                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 810                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 811
 812                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\)'
 813                 then
 814                         # squashfs or ext2/ext3 snapshot
 815                         dev=$(get_backing_device "${snapback}/${snapfile}")
 816
 817                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 818                         then
 819                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 820                                 return 1
 821                         fi
 822                 else
 823                         # cpio.gz snapshot
 824                         if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null)
 825                         then
 826                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 827                                 return 1
 828                         fi
 829                 fi
 830
 831                 umount "${snapback}"
 832         else
 833                 dev=$(find_cow_device "${snap_label}")
 834
 835                 if [ -b ${dev} ]
 836                 then
 837                         if echo "${dev}" | grep -qs loop
 838                         then
 839                                 # strange things happens, user confused?
 840                                 snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 841                                 snapfile=$(basename ${snaploop})
 842                                 snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 843                         else
 844                                 snapdev="${dev}"
 845                         fi
 846
 847                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 848                         then
 849                                 log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 850                                 return 1
 851                         else
 852                                 if [ -n "${snapfile}" ]
 853                                 then
 854                                         # it was a loop device, user confused
 855                                         umount ${snapdev}
 856                                 fi
 857                         fi
 858                 else
 859                         log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 860                         return 1
 861                 fi
 862         fi
 863
 864         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
 865         return 0
 866 }
 867
 868 setup_unionfs ()
 869 {
 870         image_directory="${1}"
 871         rootmnt="${2}"
 872
 873         modprobe -q -b ${UNIONTYPE}
 874
 875         # run-init can't deal with images in a subdir, but we're going to
 876         # move all of these away before it runs anyway.  No, we're not,
 877         # put them in / since move-mounting them into / breaks mono and
 878         # some other apps.
 879
 880         croot="/"
 881
 882         # Let's just mount the read-only file systems first
 883         rofsstring=""
 884         rofslist=""
 885         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
 886
 887         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
 888         then
 889                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
 890                 roopt="nfsro"
 891         else
 892                 roopt="ro"
 893         fi
 894
 895         # Read image names from ${MODULE}.module if it exists
 896         if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
 897         then
 898                 for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
 899                 do
 900                         image_string="${image_string} ${image_directory}/${IMAGE}"
 901                 done
 902         elif [ -e "${image_directory}/${MODULE}.module" ]
 903         then
 904                 for IMAGE in $(cat ${image_directory}/${MODULE}.module)
 905                 do
 906                         image_string="${image_string} ${image_directory}/${IMAGE}"
 907                 done
 908         else
 909                 # ${MODULE}.module does not exist, create a list of images
 910                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 911                 do
 912                         for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
 913                         do
 914                                 if [ -e "${IMAGE}" ]
 915                                 then
 916                                         image_string="${image_string} ${IMAGE}"
 917                                 fi
 918                         done
 919                 done
 920
 921                 # Now sort the list
 922                 image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
 923         fi
 924
 925         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
 926
 927         mkdir -p "${croot}"
 928
 929         for image in ${image_string}
 930         do
 931                 imagename=$(basename "${image}")
 932
 933                 if [ -d "${image}" ]
 934                 then
 935                         # it is a plain directory: do nothing
 936                         rofsstring="${image}=${roopt}:${rofsstring}"
 937                         rofslist="${image} ${rofslist}"
 938                 elif [ -f "${image}" ]
 939                 then
 940                         backdev=$(get_backing_device "${image}")
 941                         fstype=$(get_fstype "${backdev}")
 942
 943                         if [ "${fstype}" = "unknown" ]
 944                         then
 945                                 panic "Unknown file system type on ${backdev} (${image})"
 946                         fi
 947
 948                         mkdir -p "${croot}/${imagename}"
 949                         echo "debug: Can not mount backdev ${backdev} (image = ${image}) on croot/imagename ${croot}/${imagename}"
 950                         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} ${rofslist}"
 951                 fi
 952         done
 953
 954         rofsstring=${rofsstring%:}
 955
 956         mkdir -p /cow
 957
 958         # Looking for "${root_persistence}" device or file
 959         if [ -n "${PERSISTENT}" ]
 960         then
 961                 cowprobe=$(find_cow_device "${root_persistence}")
 962
 963                 if [ -b "${cowprobe}" ]
 964                 then
 965                         cowdevice=${cowprobe}
 966                         cow_fstype=$(get_fstype "${cowprobe}")
 967                 else
 968                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent medium"
 969                 fi
 970         elif [ -n "${NFS_COW}" ]
 971         then
 972                 # check if there are any nfs options
 973                 if echo ${NFS_COW}|grep -q ','
 974                 then
 975                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
 976                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
 977                 else
 978                         nfs_cow_opts="-o nolock"
 979                         nfs_cow=${NFS_COW}
 980                 fi
 981                 mac=$(get_mac)
 982                 if [ -n "${mac}" ]
 983                 then
 984                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
 985                         cow_fstype="nfs"
 986                 else
 987                         panic "unable to determine mac address"
 988                 fi
 989         else
 990                 cowdevice="tmpfs"
 991                 cow_fstype="tmpfs"
 992         fi
 993
 994         if [ "${cow_fstype}" = "nfs" ]
 995         then
 996                 [ "${quiet}" != "y" ] && log_begin_msg \
 997                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
 998                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
 999                         panic "Can not mount ${cowdevice} on /cow"
1000         else
1001                 mount ${cowdevice} -t ${cow_fstype} -o rw,noatime /cow || \
1002                         panic "Can not mount ${cowdevice} on /cow"
1003         fi
1004
1005         rofscount=$(echo ${rofslist} |wc -w)
1006
1007         if [ -n "${EXPOSED_ROOT}" ]
1008         then
1009                 if [ ${rofscount} -ne 1 ]
1010                 then
1011                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1012                 fi
1013                 exposedrootfs=${rofslist%% }
1014
1015                 mount --bind ${exposedrootfs} ${rootmnt} || \
1016                         panic "bind mount of ${exposedrootfs} failed"
1017
1018                 cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool
1019                         /home /var/lib/live'
1020
1021                 for dir in ${cow_dirs}; do
1022                         mkdir -p /cow${dir}
1023                         mount -t ${UNIONTYPE} \
1024                                 -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
1025                                 ${UNIONTYPE} "${rootmnt}${dir}" || \
1026                                 panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
1027                                         rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1028                 done
1029         else
1030                 mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
1031                         ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
1032                         ${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
1033         fi
1034
1035         # tmpfs file systems
1036         mkdir -p "${rootmnt}/live"
1037         mount -t tmpfs tmpfs ${rootmnt}/live
1038
1039         # Adding other custom mounts
1040         if [ -n "${PERSISTENT}" ]
1041         then
1042                 # directly mount /home
1043                 # FIXME: add a custom mounts configurable system
1044                 homecow=$(find_cow_device "${home_persistence}" )
1045
1046                 if [ -b "${homecow}" ]
1047                 then
1048                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1049                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1050                 else
1051                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
1052                 fi
1053
1054                 # Look for other snapshots to copy in
1055                 try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
1056                 try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
1057         fi
1058
1059         if [ -n "${SHOWMOUNTS}" ]
1060         then
1061                 for d in ${rofslist}
1062                 do
1063                         mkdir -p "${rootmnt}/live/${d##*/}"
1064
1065                         case d in
1066                                 *.dir)
1067                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1068                                         ;;
1069
1070                                 *)
1071                                         mount --move "${d}" "${rootmnt}/live/${d##*/}"
1072                                         ;;
1073                         esac
1074                 done
1075         fi
1076
1077         # shows cow fs on /cow for use by live-snapshot
1078         mkdir -p "${rootmnt}/live/cow"
1079         mount -o move /cow "${rootmnt}/live/cow"
1080 }
1081
1082 check_dev ()
1083 {
1084         sysdev="${1}"
1085         devname="${2}"
1086         skip_uuid_check="${3}"
1087
1088         if [ -z "${devname}" ]
1089         then
1090                 devname=$(sys2dev "${sysdev}")
1091         fi
1092
1093         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1094         then
1095                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1096                 devname="${loopdevname}"
1097         fi
1098
1099         fstype=$(get_fstype "${devname}")
1100
1101         if is_supported_fs ${fstype}
1102         then
1103                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1104
1105                 if is_live_path ${mountpoint} && \
1106                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1107                 then
1108                         echo ${mountpoint}
1109                         return 0
1110                 else
1111                         umount ${mountpoint}
1112                 fi
1113         fi
1114
1115         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1116         then
1117                 losetup -d "${loopdevname}"
1118         fi
1119
1120         return 1
1121 }
1122
1123 find_livefs ()
1124 {
1125         timeout="${1}"
1126
1127         # first look at the one specified in the command line
1128         if [ ! -z "${LIVE_MEDIA}" ]
1129         then
1130                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1131                 then
1132                         return 0
1133                 fi
1134         fi
1135
1136         # don't start autodetection before timeout has expired
1137         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1138         then
1139                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1140                 then
1141                         return 1
1142                 fi
1143         fi
1144
1145         # or do the scan of block devices
1146         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram)
1147         do
1148                 devname=$(sys2dev "${sysblock}")
1149                 fstype=$(get_fstype "${devname}")
1150
1151                 if /lib/udev/cdrom_id ${devname} > /dev/null
1152                 then
1153                         if check_dev "null" "${devname}"
1154                         then
1155                                 return 0
1156                         fi
1157                 elif is_nice_device "${sysblock}"
1158                 then
1159                         for dev in $(subdevices "${sysblock}")
1160                         do
1161                                 if check_dev "${dev}"
1162                                 then
1163                                         return 0
1164                                 fi
1165                         done
1166                 elif [ "${fstype}" = "squashfs" -o \
1167                         "${fstype}" = "ext2" -o \
1168                         "${fstype}" = "ext3" ]
1169                 then
1170                         # This is an ugly hack situation, the block device has
1171                         # an image directly on it.  It's hopefully
1172                         # live-initramfs, so take it and run with it.
1173                         ln -s "${devname}" "${devname}.${fstype}"
1174                         echo "${devname}.${fstype}"
1175                         return 0
1176                 fi
1177         done
1178
1179         return 1
1180 }
1181
1182 pulsate ()
1183 {
1184         if [ -x /sbin/usplash_write ]
1185         then
1186                 /sbin/usplash_write "PULSATE"
1187         fi
1188 }
1189
1190 set_usplash_timeout ()
1191 {
1192         if [ -x /sbin/usplash_write ]
1193         then
1194                 /sbin/usplash_write "TIMEOUT 120"
1195         fi
1196 }
1197
1198 mountroot ()
1199 {
1200         exec 6>&1
1201         exec 7>&2
1202         exec > live.log
1203         exec 2>&1
1204
1205         Arguments
1206
1207         set_usplash_timeout
1208         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-premount"
1209         pulsate
1210         run_scripts /scripts/live-premount
1211         [ "${quiet}" != "y" ] && log_end_msg
1212
1213         # Needed here too because some things (*cough* udev *cough*)
1214         # changes the timeout
1215
1216         set_usplash_timeout
1217
1218         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ]
1219         then
1220                 if do_netmount
1221                 then
1222                         livefs_root="${mountpoint}"
1223                 else
1224                         panic "Unable to find a live file system on the network"
1225                 fi
1226         else
1227                 # Scan local devices for the image
1228                 for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
1229                 do
1230                         livefs_root=$(find_livefs ${i})
1231
1232                         if [ -n "${livefs_root}" ]
1233                         then
1234                                 break
1235                         fi
1236
1237                         sleep 1
1238                 done
1239         fi
1240
1241         if [ -z "${livefs_root}" ]
1242         then
1243                 panic "Unable to find a medium containing a live file system"
1244         fi
1245
1246         if [ "${TORAM}" ]
1247         then
1248                 live_dest="ram"
1249         elif [ "${TODISK}" ]
1250         then
1251                 live_dest="${TODISK}"
1252         fi
1253
1254         if [ "${live_dest}" ]
1255         then
1256                 log_begin_msg "Copying live media to ${live_dest}"
1257                 copy_live_to "${livefs_root}" "${live_dest}"
1258                 log_end_msg
1259         fi
1260
1261         if [ -n "${MODULETORAMFILE}" ]
1262         then
1263                 setup_unionfs "${livefs_root}" "${rootmnt}"
1264         else
1265                 mount_images_in_directory "${livefs_root}" "${rootmnt}"
1266         fi
1267
1268         log_end_msg
1269
1270         maybe_break live-bottom
1271         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-bottom"
1272
1273         pulsate
1274         run_scripts /scripts/live-bottom
1275         [ "${quiet}" != "y" ] && log_end_msg
1276
1277         exec 1>&6 6>&-
1278         exec 2>&7 7>&-
1279         cp live.log "${rootmnt}/var/log/"
1280 }