scripts/live

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