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}"/"${LIVE_MEDIA_PATH}" ]
 438         then
 439                 for FILESYSTEM in squashfs ext2 ext3 xfs dir jffs2
 440                 do
 441                         if [ "$(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|*.jffs2)
 480                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}")
 481                         ;;
 482
 483                 *.dir)
 484                         echo "directory"
 485                         ;;
 486
 487                 *)
 488                         panic "Unrecognized live filesystem: ${1}"
 489                         ;;
 490         esac
 491 }
 492
 493 match_files_in_dir ()
 494 {
 495         # Does any files match pattern ${1} ?
 496         local pattern="${1}"
 497
 498         if [ "$(echo ${pattern})" != "${pattern}" ]
 499         then
 500                 return 0
 501         fi
 502
 503         return 1
 504 }
 505
 506 mount_images_in_directory ()
 507 {
 508         directory="${1}"
 509         rootmnt="${2}"
 510         mac="${3}"
 511
 512
 513         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 514                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 515                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 516                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 517                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 518         then
 519                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 520                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 521         else
 522                 :
 523         fi
 524 }
 525
 526 is_nice_device ()
 527 {
 528         sysfs_path="${1#/sys}"
 529
 530         if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"
 531         then
 532                 return 0
 533         fi
 534
 535         return 1
 536 }
 537
 538 is_supported_fs ()
 539 {
 540         # FIXME: do something better like the scan of supported filesystems
 541         fstype="${1}"
 542
 543         case ${fstype} in
 544                 vfat|iso9660|udf|ext2|ext3|ntfs|jffs2)
 545                         return 0
 546                         ;;
 547         esac
 548
 549         return 1
 550 }
 551
 552 copy_live_to ()
 553 {
 554         copyfrom="${1}"
 555         copytodev="${2}"
 556         copyto="${copyfrom}_swap"
 557
 558         if [ -z "${MODULETORAM}" ]
 559         then
 560                 size=$(fs_size "" ${copyfrom} "used")
 561         else
 562                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 563
 564                 if [ -f "${MODULETORAMFILE}" ]
 565                 then
 566                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 567                 else
 568                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 569                         return 1
 570                 fi
 571         fi
 572
 573         if [ "${copytodev}" = "ram" ]
 574         then
 575                 # copying to ram:
 576                 freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
 577                 mount_options="-o size=${size}k"
 578                 free_string="memory"
 579                 fstype="tmpfs"
 580                 dev="/dev/shm"
 581         else
 582                 # it should be a writable block device
 583                 if [ -b "${copytodev}" ]
 584                 then
 585                         dev="${copytodev}"
 586                         free_string="space"
 587                         fstype=$(get_fstype "${dev}")
 588                         freespace=$(fs_size "${dev}")
 589                 else
 590                         [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
 591                         return 1
 592                 fi
 593         fi
 594
 595         if [ "${freespace}" -lt "${size}" ]
 596         then
 597                 [ "${quiet}" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 598                 return 1
 599         fi
 600
 601         # begin copying (or uncompressing)
 602         mkdir "${copyto}"
 603         echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 604         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 605
 606         if [ "${extension}" = "tgz" ]
 607         then
 608                 cd "${copyto}"
 609                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 610                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 611                 mount -r --move "${copyto}" "${rootmnt}"
 612                 cd "${OLDPWD}"
 613         else
 614                 if [ -n "${MODULETORAMFILE}" ]
 615                 then
 616                         cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 617                 else
 618                         cp -a ${copyfrom}/* ${copyto}   # "cp -a" from busybox also copies hidden files
 619                 fi
 620
 621                 livefs_root
 622                 umount ${copyfrom}
 623                 mount -r --move ${copyto} ${copyfrom}
 624         fi
 625
 626         rmdir ${copyto}
 627         return 0
 628 }
 629
 630 do_netmount ()
 631 {
 632         rc=1
 633
 634         modprobe -q af_packet # For DHCP
 635
 636         udevtrigger
 637         udevsettle
 638
 639         ipconfig ${DEVICE} | tee /netboot.config
 640
 641         # source relevant ipconfig output
 642         OLDHOSTNAME=${HOSTNAME}
 643         . /tmp/net-${DEVICE}.conf
 644         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 645         export HOSTNAME
 646
 647         if [ "${NFSROOT}" = "auto" ]
 648         then
 649                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 650         fi
 651
 652         if [ -n "${FETCH}" ] && do_httpmount
 653         then
 654                 rc=0
 655                 return ${rc}
 656         fi
 657
 658         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 659         then
 660                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 661         fi
 662
 663         [ "${quiet}" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
 664
 665         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 666         then
 667                 rc=0
 668         elif do_nfsmount
 669         then
 670                 NETBOOT="nfs"
 671                 export NETBOOT
 672                 rc=0
 673         fi
 674
 675         [ "${quiet}" != "y" ] && log_end_msg
 676         return ${rc}
 677 }
 678
 679 do_httpmount ()
 680 {
 681         rc=1
 682         extension=$(echo "${FETCH}" | sed 's/\(.*\)\.\(.*\)/\2/')
 683
 684         case "${extension}" in
 685                 squashfs|tgz|tar)
 686                         [ "${quiet}" != "y" ] && log_begin_msg "Trying wget ${FETCH} -O ${mountpoint}/$(basename ${FETCH})"
 687                         mkdir -p "${mountpoint}/${LIVE_MEDIA_PATH}"
 688                         wget "${FETCH}" -O "${mountpoint}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 689                         [ ${?} -eq 0 ] && rc=0
 690                         [ "${extension}" = "tgz" ] && live_dest="ram"
 691                         ;;
 692
 693                 *)
 694                         [ "${quiet}" != "y" ] && log_begin_msg "Unrecognized archive extension for ${FETCH}"
 695         esac
 696
 697         return ${rc}
 698 }
 699
 700 do_nfsmount ()
 701 {
 702         rc=1
 703
 704         modprobe -q nfs
 705
 706         if [ -z "${NFSOPTS}" ]
 707         then
 708                 NFSOPTS=""
 709         fi
 710
 711         [ "${quiet}" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 712
 713         # FIXME: This for loop is an ugly HACK round an nfs bug
 714         for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13
 715         do
 716                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 717                 sleep 1
 718         done
 719
 720         return ${rc}
 721 }
 722
 723 do_cifsmount ()
 724 {
 725         rc=1
 726
 727         if [ -x "/sbin/mount.cifs" ]
 728         then
 729                 if [ -z "${NFSOPTS}" ]
 730                 then
 731                         CIFSOPTS="-ouser=root,password="
 732                 else
 733                         CIFSOPTS="${NFSOPTS}"
 734                 fi
 735
 736                 [ "${quiet}" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 737                 modprobe -q cifs
 738
 739                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 740                 then
 741                         rc=0
 742                 fi
 743         fi
 744
 745         return ${rc}
 746 }
 747
 748 do_snap_copy ()
 749 {
 750         fromdev="${1}"
 751         todir="${2}"
 752         snap_type="${3}"
 753         size=$(fs_size "${fromdev}" "" "used")
 754
 755         if [ -b "${fromdev}" ]
 756         then
 757                 # look for free mem
 758                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 759                 then
 760                         todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
 761                         freespace=$(df -k  | grep -s ${todev} | awk '{print $4}')
 762                 else
 763                         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
 764                 fi
 765
 766                 tomount="/mnt/tmpsnap"
 767
 768                 if [ ! -d "${tomount}" ]
 769                 then
 770                         mkdir -p "${tomount}"
 771                 fi
 772
 773                 fstype=$(get_fstype "${fromdev}")
 774
 775                 if [ -n "${fstype}" ]
 776                 then
 777                         # Copying stuff...
 778                         mount -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
 779                         cp -a "${tomount}"/* ${todir}
 780                         umount "${tomount}"
 781                 else
 782                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 783                 fi
 784
 785                 rmdir "${tomount}"
 786
 787                 if echo ${fromdev} | grep -qs loop
 788                 then
 789                         losetup -d "${fromdev}"
 790                 fi
 791
 792                 return 0
 793         else
 794                 return 1
 795
 796                 [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 797         fi
 798 }
 799
 800 try_snap ()
 801 {
 802         # Look for ${snap_label}.* in block devices and copy the contents to ${snap_mount}
 803         # and remember the device and filename for resync on exit in live-initramfs.init
 804
 805         snap_label="${1}"
 806         snap_mount="${2}"
 807         snap_type="${3}"
 808         snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3 ${snap_label}.jffs2")
 809
 810         if [ ! -z "${snapdata}" ]
 811         then
 812                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 813                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 814                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 815
 816                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|jffs2\)'
 817                 then
 818                         # squashfs, jffs2 or ext2/ext3 snapshot
 819                         dev=$(get_backing_device "${snapback}/${snapfile}")
 820
 821                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 822                         then
 823                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 824                                 return 1
 825                         fi
 826                 else
 827                         # cpio.gz snapshot
 828                         if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null)
 829                         then
 830                                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 831                                 return 1
 832                         fi
 833                 fi
 834
 835                 umount "${snapback}"
 836         else
 837                 dev=$(find_cow_device "${snap_label}")
 838
 839                 if [ -b ${dev} ]
 840                 then
 841                         if echo "${dev}" | grep -qs loop
 842                         then
 843                                 # strange things happens, user confused?
 844                                 snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 845                                 snapfile=$(basename ${snaploop})
 846                                 snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 847                         else
 848                                 snapdev="${dev}"
 849                         fi
 850
 851                         if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
 852                         then
 853                                 log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 854                                 return 1
 855                         else
 856                                 if [ -n "${snapfile}" ]
 857                                 then
 858                                         # it was a loop device, user confused
 859                                         umount ${snapdev}
 860                                 fi
 861                         fi
 862                 else
 863                         log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 864                         return 1
 865                 fi
 866         fi
 867
 868         echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
 869         return 0
 870 }
 871
 872 setup_unionfs ()
 873 {
 874         image_directory="${1}"
 875         rootmnt="${2}"
 876         addimage_directory="${3}"
 877         modprobe -q -b ${UNIONTYPE}
 878
 879         # run-init can't deal with images in a subdir, but we're going to
 880         # move all of these away before it runs anyway.  No, we're not,
 881         # put them in / since move-mounting them into / breaks mono and
 882         # some other apps.
 883
 884         croot="/"
 885
 886         # Let's just mount the read-only file systems first
 887         rofsstring=""
 888         rofslist=""
 889         minor_kernel_version=$(uname -r|cut -c 5-|sed 's/[^0-9].*//')
 890
 891         if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]
 892         then
 893                 # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
 894                 roopt="nfsro"
 895         else
 896                 roopt="ro"
 897         fi
 898
 899         # Read image names from ${MODULE}.module if it exists
 900         if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
 901         then
 902                 for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
 903                 do
 904                         image_string="${image_string} ${image_directory}/${IMAGE}"
 905                 done
 906         elif [ -e "${image_directory}/${MODULE}.module" ]
 907         then
 908                 for IMAGE in $(cat ${image_directory}/${MODULE}.module)
 909                 do
 910                         image_string="${image_string} ${image_directory}/${IMAGE}"
 911                 done
 912         else
 913                 # ${MODULE}.module does not exist, create a list of images
 914                 for FILESYSTEM in squashfs ext2 ext3 xfs jffs2 dir
 915                 do
 916                         for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
 917                         do
 918                                 if [ -e "${IMAGE}" ]
 919                                 then
 920                                         image_string="${image_string} ${IMAGE}"
 921                                 fi
 922                         done
 923                 done
 924
 925                 if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
 926                 then
 927                         for FILESYSTEM in squashfs ext2 ext3 xfs jffs2 dir
 928                         do
 929                                 for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
 930                                 do
 931                                         if [ -e "${IMAGE}" ]
 932                                         then
 933                                                 image_string="${image_string} ${IMAGE}"
 934                                         fi
 935                                 done
 936                         done
 937                 fi
 938
 939                 # Now sort the list
 940                 image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
 941         fi
 942
 943         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
 944
 945         mkdir -p "${croot}"
 946
 947         for image in ${image_string}
 948         do
 949                 imagename=$(basename "${image}")
 950
 951                 if [ -d "${image}" ]
 952                 then
 953                         # it is a plain directory: do nothing
 954                         rofsstring="${image}=${roopt}:${rofsstring}"
 955                         rofslist="${image} ${rofslist}"
 956                 elif [ -f "${image}" ]
 957                 then
 958                         backdev=$(get_backing_device "${image}")
 959                         fstype=$(get_fstype "${backdev}")
 960
 961                         if [ "${fstype}" = "unknown" ]
 962                         then
 963                                 panic "Unknown file system type on ${backdev} (${image})"
 964                         fi
 965
 966                         mkdir -p "${croot}/${imagename}"
 967                         echo "debug: Can not mount backdev ${backdev} (image = ${image}) on croot/imagename ${croot}/${imagename}"
 968                         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} ${rofslist}"
 969                 fi
 970         done
 971
 972         rofsstring=${rofsstring%:}
 973
 974         mkdir -p /cow
 975
 976         # Looking for "${root_persistence}" device or file
 977         if [ -n "${PERSISTENT}" ]
 978         then
 979                 cowprobe=$(find_cow_device "${root_persistence}")
 980
 981                 if [ -b "${cowprobe}" ]
 982                 then
 983                         cowdevice=${cowprobe}
 984                         cow_fstype=$(get_fstype "${cowprobe}")
 985                 else
 986                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent medium"
 987                         cowdevice="tmpfs"
 988                         cow_fstype="tmpfs"
 989                 fi
 990         elif [ -n "${NFS_COW}" ]
 991         then
 992                 # check if there are any nfs options
 993                 if echo ${NFS_COW}|grep -q ','
 994                 then
 995                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
 996                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
 997                 else
 998                         nfs_cow_opts="-o nolock"
 999                         nfs_cow=${NFS_COW}
1000                 fi
1001                 mac="$(get_mac)"
1002                 if [ -n "${mac}" ]
1003                 then
1004                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1005                         cow_fstype="nfs"
1006                 else
1007                         panic "unable to determine mac address"
1008                 fi
1009         else
1010                 cowdevice="tmpfs"
1011                 cow_fstype="tmpfs"
1012         fi
1013
1014         if [ "${cow_fstype}" = "nfs" ]
1015         then
1016                 [ "${quiet}" != "y" ] && log_begin_msg \
1017                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1018                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1019                         panic "Can not mount ${cowdevice} on /cow"
1020         else
1021                 mount ${cowdevice} -t ${cow_fstype} -o rw,noatime /cow || \
1022                         panic "Can not mount ${cowdevice} on /cow"
1023         fi
1024
1025         rofscount=$(echo ${rofslist} |wc -w)
1026
1027         if [ -n "${EXPOSED_ROOT}" ]
1028         then
1029                 if [ ${rofscount} -ne 1 ]
1030                 then
1031                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1032                 fi
1033                 exposedrootfs=${rofslist%% }
1034
1035                 mount --bind ${exposedrootfs} ${rootmnt} || \
1036                         panic "bind mount of ${exposedrootfs} failed"
1037
1038                 cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool
1039                         /home /var/lib/live'
1040
1041                 for dir in ${cow_dirs}; do
1042                         mkdir -p /cow${dir}
1043                         mount -t ${UNIONTYPE} \
1044                                 -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro \
1045                                 ${UNIONTYPE} "${rootmnt}${dir}" || \
1046                                 panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option \
1047                                         rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1048                 done
1049         else
1050                 mount -t ${UNIONTYPE} -o noatime,dirs=/cow=rw:${rofsstring} \
1051                         ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on \
1052                         ${rootmnt} failed with option noatime,dirs=/cow=rw:${rofsstring}"
1053         fi
1054
1055         # tmpfs file systems
1056         mkdir -p "${rootmnt}/live"
1057         mount -t tmpfs tmpfs ${rootmnt}/live
1058
1059         # Adding other custom mounts
1060         if [ -n "${PERSISTENT}" ]
1061         then
1062                 # directly mount /home
1063                 # FIXME: add a custom mounts configurable system
1064                 homecow=$(find_cow_device "${home_persistence}" )
1065
1066                 if [ -b "${homecow}" ]
1067                 then
1068                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1069                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1070                 else
1071                         [ "${quiet}" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
1072                 fi
1073
1074                 # Look for other snapshots to copy in
1075                 try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
1076                 try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
1077         fi
1078
1079         if [ -n "${SHOWMOUNTS}" ]
1080         then
1081                 for d in ${rofslist}
1082                 do
1083                         mkdir -p "${rootmnt}/live/${d##*/}"
1084
1085                         case d in
1086                                 *.dir)
1087                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1088                                         ;;
1089
1090                                 *)
1091                                         mount --move "${d}" "${rootmnt}/live/${d##*/}"
1092                                         ;;
1093                         esac
1094                 done
1095         fi
1096
1097         # shows cow fs on /cow for use by live-snapshot
1098         mkdir -p "${rootmnt}/live/cow"
1099         mount -o move /cow "${rootmnt}/live/cow"
1100 }
1101
1102 check_dev ()
1103 {
1104         sysdev="${1}"
1105         devname="${2}"
1106         skip_uuid_check="${3}"
1107
1108         if [ -z "${devname}" ]
1109         then
1110                 devname=$(sys2dev "${sysdev}")
1111         fi
1112
1113         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1114         then
1115                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1116                 devname="${loopdevname}"
1117         fi
1118
1119         fstype=$(get_fstype "${devname}")
1120
1121         if is_supported_fs ${fstype}
1122         then
1123                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1124
1125                 if is_live_path ${mountpoint} && \
1126                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1127                 then
1128                         echo ${mountpoint}
1129                         return 0
1130                 else
1131                         umount ${mountpoint}
1132                 fi
1133         fi
1134
1135         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1136         then
1137                 losetup -d "${loopdevname}"
1138         fi
1139
1140         return 1
1141 }
1142
1143 find_livefs ()
1144 {
1145         timeout="${1}"
1146
1147         # first look at the one specified in the command line
1148         if [ ! -z "${LIVE_MEDIA}" ]
1149         then
1150                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1151                 then
1152                         return 0
1153                 fi
1154         fi
1155
1156         # don't start autodetection before timeout has expired
1157         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1158         then
1159                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1160                 then
1161                         return 1
1162                 fi
1163         fi
1164
1165         # or do the scan of block devices
1166         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram)
1167         do
1168                 devname=$(sys2dev "${sysblock}")
1169                 fstype=$(get_fstype "${devname}")
1170
1171                 if /lib/udev/cdrom_id ${devname} > /dev/null
1172                 then
1173                         if check_dev "null" "${devname}"
1174                         then
1175                                 return 0
1176                         fi
1177                 elif is_nice_device "${sysblock}"
1178                 then
1179                         for dev in $(subdevices "${sysblock}")
1180                         do
1181                                 if check_dev "${dev}"
1182                                 then
1183                                         return 0
1184                                 fi
1185                         done
1186                 elif [ "${fstype}" = "squashfs" -o \
1187                         "${fstype}" = "ext2" -o \
1188                         "${fstype}" = "ext3" -o \
1189                         "${fstype}" = "jffs2" ]
1190                 then
1191                         # This is an ugly hack situation, the block device has
1192                         # an image directly on it.  It's hopefully
1193                         # live-initramfs, so take it and run with it.
1194                         ln -s "${devname}" "${devname}.${fstype}"
1195                         echo "${devname}.${fstype}"
1196                         return 0
1197                 fi
1198         done
1199
1200         return 1
1201 }
1202
1203 set_usplash_timeout ()
1204 {
1205         if [ -x /sbin/usplash_write ]
1206         then
1207                 /sbin/usplash_write "TIMEOUT 120"
1208         fi
1209 }
1210
1211 mountroot ()
1212 {
1213         exec 6>&1
1214         exec 7>&2
1215         exec > live.log
1216         exec 2>&1
1217
1218         Arguments
1219
1220         set_usplash_timeout
1221         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-premount"
1222         run_scripts /scripts/live-premount
1223         [ "${quiet}" != "y" ] && log_end_msg
1224
1225         # Needed here too because some things (*cough* udev *cough*)
1226         # changes the timeout
1227
1228         set_usplash_timeout
1229
1230         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ]
1231         then
1232                 if do_netmount
1233                 then
1234                         livefs_root="${mountpoint}"
1235                 else
1236                         panic "Unable to find a live file system on the network"
1237                 fi
1238         else
1239                 # Scan local devices for the image
1240                 for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
1241                 do
1242                         livefs_root=$(find_livefs ${i})
1243
1244                         if [ -n "${livefs_root}" ]
1245                         then
1246                                 break
1247                         fi
1248
1249                         sleep 1
1250                 done
1251         fi
1252
1253         if [ -z "${livefs_root}" ]
1254         then
1255                 panic "Unable to find a medium containing a live file system"
1256         fi
1257
1258         if [ "${TORAM}" ]
1259         then
1260                 live_dest="ram"
1261         elif [ "${TODISK}" ]
1262         then
1263                 live_dest="${TODISK}"
1264         fi
1265
1266         if [ "${live_dest}" ]
1267         then
1268                 log_begin_msg "Copying live media to ${live_dest}"
1269                 copy_live_to "${livefs_root}" "${live_dest}"
1270                 log_end_msg
1271         fi
1272
1273         if [ -n "${MODULETORAMFILE}" ]
1274         then
1275                 setup_unionfs "${livefs_root}" "${rootmnt}"
1276         else
1277                 mac="$(get_mac)"
1278                 mac="$(echo ${mac} | sed 's/-//g')"
1279                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1280         fi
1281
1282         log_end_msg
1283
1284         maybe_break live-bottom
1285         [ "${quiet}" != "y" ] && log_begin_msg "Running /scripts/live-bottom"
1286
1287         run_scripts /scripts/live-bottom
1288         [ "${quiet}" != "y" ] && log_end_msg
1289
1290         exec 1>&6 6>&-
1291         exec 2>&7 7>&-
1292         cp live.log "${rootmnt}/var/log/"
1293 }