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 "${mountpoint}"
  24
  25 [ -f /etc/live.conf ] && . /etc/live.conf
  26 export USERNAME USERFULLNAME HOSTNAME BUILD_SYSTEM
  27
  28 . /scripts/live-helpers
  29
  30 if [ ! -f /live.vars ]; then
  31     touch /live.vars
  32 fi
  33
  34 Arguments ()
  35 {
  36         PRESEEDS=""
  37
  38         for ARGUMENT in `cat /proc/cmdline`
  39         do
  40                 case "${ARGUMENT}" in
  41                         access=*)
  42                                 ACCESS="${ARGUMENT#access=}"
  43                                 export ACCESS
  44                                 ;;
  45
  46                         console=*)
  47                                 DEFCONSOLE="${ARGUMENT#*=}"
  48                                 export DEFCONFSOLE
  49                                 ;;
  50
  51                         debug)
  52                                 DEBUG="Yes"
  53                                 export DEBUG
  54
  55                                 set -x
  56                                 ;;
  57
  58                         fetch=*)
  59                                 FETCH="${ARGUMENT#fetch=}"
  60                                 export FETCH
  61                                 ;;
  62
  63                         hostname=*)
  64                                 HOSTNAME="${ARGUMENT#hostname=}"
  65                                 LIVECONF="changed"
  66                                 export HOSTNAME LIVECONF
  67                                 ;;
  68
  69                         username=*)
  70                                 USERNAME="${ARGUMENT#username=}"
  71                                 LIVECONF="changed"
  72                                 export USERNAME LIVECONF
  73                                 ;;
  74
  75                         userfullname=*)
  76                                 USERFULLNAME="${ARGUMENT#userfullname=}"
  77                                 LIVECONF="changed"
  78                                 export USERFULLNAME LIVECONF
  79                                 ;;
  80
  81                         ip=*)
  82                                 STATICIP="${ARGUMENT#ip=}"
  83
  84                                 if [ -z "${STATICIP}" ]
  85                                 then
  86                                         STATICIP="frommedia"
  87                                 fi
  88
  89                                 export STATICIP
  90                                 ;;
  91
  92                         keyb=*|kbd-chooser/method=*)
  93                                 KBD="${ARGUMENT#*=}"
  94                                 export KBD
  95                                 ;;
  96
  97                         klayout=*|console-setup/layoutcode=*)
  98                                 KLAYOUT="${ARGUMENT#*=}"
  99                                 export KLAYOUT
 100                                 ;;
 101
 102                         kvariant=*|console-setup/variantcode=*)
 103                                 KVARIANT="${ARGUMENT#*=}"
 104                                 export KVARIANT
 105                                 ;;
 106
 107                         kmodel=*|console-setup/modelcode=*)
 108                                 KMODEL="${ARGUMENT#*=}"
 109                                 export KMODEL
 110                                 ;;
 111
 112                         koptions=*)
 113                                 KOPTIONS="${ARGUMENT#koptions=}"
 114                                 export KOPTIONS
 115                                 ;;
 116
 117                         live-getty)
 118                                 LIVE_GETTY="1"
 119                                 export LIVE_GETTY
 120                                 ;;
 121
 122                         live-media=*|bootfrom=*)
 123                                 LIVE_MEDIA="${ARGUMENT#*=}"
 124                                 export LIVE_MEDIA
 125                                 ;;
 126
 127                         live-media-encryption=*|encryption=*)
 128                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 129                                 export LIVE_MEDIA_ENCRYPTION
 130                                 ;;
 131
 132                         live-media-offset=*)
 133                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 134                                 export LIVE_MEDIA_OFFSET
 135                                 ;;
 136
 137                         live-media-path=*)
 138                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 139                                 export LIVE_MEDIA_PATH
 140                                 ;;
 141
 142                         live-media-timeout=*)
 143                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 144                                 export LIVE_MEDIA_TIMEOUT
 145                                 ;;
 146
 147                         locale=*|debian-installer/locale=*)
 148                                 LOCALE="${ARGUMENT#*=}"
 149                                 export LOCALE
 150                                 ;;
 151
 152                         module=*)
 153                                 MODULE="${ARGUMENT#module=}"
 154                                 export MODULE
 155                                 ;;
 156
 157                         netboot=*)
 158                                 NETBOOT="${ARGUMENT#netboot=}"
 159                                 export NETBOOT
 160                                 ;;
 161
 162                         nfsopts=*)
 163                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 164                                 export NFSOPTS
 165                                 ;;
 166
 167                         noautologin)
 168                                 NOAUTOLOGIN="Yes"
 169                                 export NOAUTOLOGIN
 170                                 ;;
 171
 172                         noxautologin)
 173                                 NOXAUTOLOGIN="Yes"
 174                                 export NOXAUTOLOGIN
 175                                 ;;
 176
 177                         nofastboot)
 178                                 NOFASTBOOT="Yes"
 179                                 export NOFASTBOOT
 180                                 ;;
 181
 182                         nopersistent)
 183                                 PERSISTENT=""
 184                                 export PERSISTENT
 185                                 ;;
 186
 187                         nosudo)
 188                                 NOSUDO="Yes"
 189                                 export NOSUDO
 190                                 ;;
 191
 192                         noswap)
 193                                 NOSWAP="Yes"
 194                                 export NOSWAP
 195                                 ;;
 196
 197                         persistent)
 198                                 PERSISTENT="Yes"
 199                                 export PERSISTENT
 200                                 ;;
 201
 202                         preseed/file=*|file=*)
 203                                 LOCATION="${ARGUMENT#*=}"
 204                                 export LOCATION
 205                                 ;;
 206
 207                         url=*)
 208                                 location="${ARGUMENT#url=}"
 209
 210                                 mount -n -o bind /sys /root/sys
 211                                 mount -n -o bind /proc /root/proc
 212                                 mount -n -o bind /dev /root/dev
 213
 214                                 mkdir -p /root/var/run/network
 215                                 chroot /root ifup -a
 216                                 chroot /root wget -P /tmp "$location"
 217                                 chroot /root ifdown -a
 218
 219                                 umount /root/sys
 220                                 umount /root/proc
 221                                 umount /root/dev
 222
 223                                 LOCATION="/tmp/$(basename "$location")"
 224                                 ;;
 225
 226                         */*=*)
 227                                 question="${ARGUMENT%%=*}"
 228                                 value="${ARGUMENT#*=}"
 229                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 230                                 export PRESEEDS
 231                                 ;;
 232
 233                         showmounts)
 234                                 SHOWMOUNTS="Yes"
 235                                 export SHOWMOUNTS
 236                                 ;;
 237
 238                         timezone=*)
 239                                 TIMEZONE="${ARGUMENT#timezone=}"
 240                                 export TIMEZONE
 241                                 ;;
 242
 243                         todisk=*)
 244                                 TODISK="${ARGUMENT#todisk=}"
 245                                 export TODISK
 246                                 ;;
 247
 248                         toram)
 249                                 TORAM="Yes"
 250                                 export TORAM
 251                                 ;;
 252
 253                         union=*)
 254                                 UNIONTYPE="${ARGUMENT#union=}"
 255                                 export UNIONTYPE
 256                                 ;;
 257
 258                         utc=*)
 259                                 UTC="${ARGUMENT#utc=}"
 260                                 export UTC
 261                                 ;;
 262
 263                         xdebconf)
 264                                 XDEBCONF="Yes"
 265                                 export XDEBCONF
 266                                 ;;
 267
 268                         xvideomode=*)
 269                                 XVIDEOMODE="${ARGUMENT#xvideomode=}"
 270                                 export XVIDEOMODE
 271                                 ;;
 272                 esac
 273         done
 274
 275         # sort of compatibility with netboot.h from linux docs
 276         if [ -z "${NETBOOT}" ]
 277         then
 278                 if [ "${ROOT}" = "/dev/nfs" ]
 279                 then
 280                         NETBOOT="nfs"
 281                         export NETBOOT
 282                 elif [ "${ROOT}" = "/dev/cifs" ]
 283                 then
 284                         NETBOOT="cifs"
 285                         export NETBOOT
 286                 fi
 287         fi
 288
 289         if [ -z "${MODULE}" ]
 290         then
 291                 MODULE="filesystem"
 292                 export MODULE
 293         fi
 294
 295         if [ -z "${UNIONTYPE}" ]
 296         then
 297                 UNIONTYPE="unionfs"
 298                 export UNIONTYPE
 299         fi
 300 }
 301
 302 is_live_path()
 303 {
 304         DIRECTORY="${1}"
 305
 306         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 307         then
 308                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 309                 do
 310                         if [ "`echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}`" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 311                         then
 312                                 return 0
 313                         fi
 314                 done
 315         fi
 316
 317         return 1
 318 }
 319
 320 get_backing_device() {
 321     case "$1" in
 322         *.squashfs|*.ext2|*.ext3)
 323             echo $(setup_loop "$1" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}")
 324             ;;
 325         *.dir)
 326             echo "directory"
 327             ;;
 328         *)
 329             panic "Unrecognized live filesystem: $1"
 330             ;;
 331     esac
 332 }
 333
 334 match_files_in_dir() {
 335     # Does any files match pattern $1 ?
 336
 337     local pattern="$1"
 338     if [ "$(echo $pattern)" != "$pattern" ]; then
 339         return 0
 340     fi
 341     return 1
 342 }
 343
 344 mount_images_in_directory() {
 345     directory="$1"
 346     rootmnt="$2"
 347
 348     if match_files_in_dir "$directory/${LIVE_MEDIA_PATH}/*.squashfs" ||
 349         match_files_in_dir "$directory/${LIVE_MEDIA_PATH}/*.ext2" ||
 350         match_files_in_dir "$directory/${LIVE_MEDIA_PATH}/*.ext3" ||
 351         match_files_in_dir "$directory/${LIVE_MEDIA_PATH}/*.dir"; then
 352         setup_unionfs "$directory/${LIVE_MEDIA_PATH}" "$rootmnt"
 353     else
 354         :
 355     fi
 356 }
 357
 358 is_nice_device() {
 359     sysfs_path="${1#/sys}"
 360     if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-[ide|scsi|usb])"; then
 361         return 0
 362     fi
 363     return 1
 364 }
 365
 366 is_supported_fs () {
 367     # FIXME: do something better like the scan of supported filesystems
 368     fstype="${1}"
 369     case ${fstype} in
 370         vfat|iso9660|udf|ext2|ext3|ntfs)
 371             return 0
 372             ;;
 373     esac
 374     return 1
 375 }
 376
 377 copy_live_to() {
 378     copyfrom="${1}"
 379     copytodev="${2}"
 380     copyto="${copyfrom}_swap"
 381
 382     size=$(fs_size "" ${copyfrom} "used")
 383
 384     if [ "${copytodev}" = "ram" ]; then
 385         # copying to ram:
 386         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
 387         mount_options="-o size=${size}k"
 388         free_string="memory"
 389         fstype="tmpfs"
 390         dev="/dev/shm"
 391     else
 392         # it should be a writable block device
 393         if [ -b "${copytodev}" ]; then
 394             dev="${copytodev}"
 395             free_string="space"
 396             fstype=$(get_fstype "${dev}")
 397             freespace=$(fs_size "${dev}")
 398         else
 399             [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
 400             return 1
 401         fi
 402     fi
 403     if [ "${freespace}" -lt "${size}" ] ; then
 404         [ "$quiet" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k > ${size}k) to copy live media in ${copytodev}."
 405         return 1
 406     fi
 407
 408     # begin copying (or uncompressing)
 409     mkdir "${copyto}"
 410     echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 411     mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 412
 413     if [ "$extension" == "tgz" ]; then
 414         cd "${copyto}"
 415         tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 416         rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 417         mount -r --move "${copyto}" "${rootmnt}"
 418         cd "${OLDPWD}"
 419     else
 420         cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
 421         umount ${copyfrom}
 422         mount -r --move ${copyto} ${copyfrom}
 423     fi
 424     rmdir ${copyto}
 425     return 0
 426 }
 427
 428 do_netmount() {
 429     rc=1
 430
 431     modprobe "${MP_QUIET}" af_packet # For DHCP
 432
 433     udevtrigger
 434     udevsettle
 435
 436     ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf | tee /netboot.config
 437
 438     if [ "${NFSROOT}" = "auto" ]; then
 439         NFSROOT=${ROOTSERVER}:${ROOTPATH}
 440     fi
 441
 442     # source relevant ipconfig output
 443     . /tmp/net-${DEVICE}.conf
 444     export HOSTNAME
 445
 446     if [ -n "${FETCH}" ] && do_httpmount; then
 447         rc=0
 448         return ${rc}
 449     fi
 450
 451     if [ "${NFSROOT#*:}" = "$NFSROOT" ] && [ "$NETBOOT" != "cifs" ]; then
 452         NFSROOT=${ROOTSERVER}:${NFSROOT}
 453     fi
 454
 455     [ "$quiet" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
 456
 457     if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then
 458         rc=0
 459     elif do_nfsmount ; then
 460         NETBOOT="nfs"
 461         export NETBOOT
 462         rc=0
 463     fi
 464
 465     [ "$quiet" != "y" ] && log_end_msg
 466     return ${rc}
 467 }
 468
 469 do_httpmount() {
 470     rc=1
 471     extension=`echo "${FETCH}" | sed 's/\(.*\)\.\(.*\)/\2/'`
 472     case "${extension}" in
 473         squashfs|tgz|tar)
 474             [ "$quiet" != "y" ] && log_begin_msg "Trying wget ${FETCH} -O ${mountpoint}/$(basename ${FETCH})"
 475             mkdir -p "${mountpoint}/${LIVE_MEDIA_PATH}"
 476             wget "${FETCH}" -O "${mountpoint}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 477             [ $? -eq 0 ] && rc=0
 478             [ "${extension}" == "tgz" ] && live_dest="ram"
 479             ;;
 480         *)
 481             [ "$quiet" != "y" ] && log_begin_msg "Unrecognized archive extension for ${FETCH}"
 482     esac
 483     return ${rc}
 484 }
 485
 486 do_nfsmount() {
 487     rc=1
 488     modprobe "${MP_QUIET}" nfs
 489     if [ -z "${NFSOPTS}" ]; then
 490         NFSOPTS=""
 491     fi
 492
 493     [ "$quiet" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 494     # FIXME: This for loop is an ugly HACK round an nfs bug
 495     for i in 0 1 2 3 4 5 6 7 8 9 a b c d e f 10 11 12 13; do
 496         nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 497         sleep 1
 498     done
 499     return ${rc}
 500 }
 501
 502 do_cifsmount() {
 503     rc=1
 504     if [ -x "/sbin/mount.cifs" ]; then
 505         if [ -z "${NFSOPTS}" ]; then
 506             CIFSOPTS="-ouser=root,password="
 507         else
 508             CIFSOPTS="${NFSOPTS}"
 509         fi
 510
 511         [ "$quiet" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 512         modprobe "${MP_QUIET}" cifs
 513
 514         if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}" ; then
 515             rc=0
 516         fi
 517     fi
 518     return ${rc}
 519 }
 520
 521 do_snap_copy ()
 522 {
 523     fromdev="${1}"
 524     todir="${2}"
 525     snap_type="${3}"
 526
 527     size=$(fs_size "${fromdev}" "" "used")
 528
 529     if [ -b "${fromdev}" ]; then
 530         # look for free mem
 531         if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]; then
 532             todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
 533             freespace=$(df -k  | grep -s ${todev} | awk '{print $4}')
 534         else
 535             freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
 536         fi
 537
 538         tomount="/mnt/tmpsnap"
 539         if [ ! -d "${tomount}" ] ; then
 540             mkdir -p "${tomount}"
 541         fi
 542
 543         fstype=$(get_fstype "${fromdev}")
 544         if [ -n "${fstype}" ]; then
 545             # Copying stuff...
 546             mount -t "${fstype}" -o ro "${fromdev}" "${tomount}"
 547             cp -a "${tomount}"/* ${todir}
 548             umount "${tomount}"
 549         else
 550             log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 551         fi
 552
 553         rmdir "${tomount}"
 554         if echo ${fromdev} | grep -qs loop; then
 555            losetup -d "${fromdev}"
 556         fi
 557         return 0
 558     else
 559         return 1
 560         [ "$quiet" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 561     fi
 562 }
 563
 564 try_snap ()
 565 {
 566     # Look for $snap_label.* in block devices and copy the contents to $snap_mount
 567     #   and remember the device and filename for resync on exit in live-initramfs.init
 568
 569     snap_label="${1}"
 570     snap_mount="${2}"
 571     snap_type="${3}"
 572
 573     snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2 ${snap_label}.ext3")
 574     if [ ! -z "${snapdata}" ]; then
 575         snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 576         snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 577         snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 578         if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\)'; then
 579             # squashfs or ext2/ext3 snapshot
 580             dev=$(get_backing_device "${snapback}/${snapfile}")
 581             if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"; then
 582                  log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 583                  return 1
 584             fi
 585         else
 586             # cpio.gz snapshot
 587             if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i -u -d 2>/dev/null) ; then
 588                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 589                 return 1
 590             fi
 591         fi
 592         umount "${snapback}"
 593     else
 594         dev=$(find_cow_device "${snap_label}")
 595         if [ -b ${dev} ]; then
 596             if echo "${dev}" | grep -qs loop; then
 597                 # strange things happens, user confused?
 598                 snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 599                 snapfile=$(basename ${snaploop})
 600                 snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 601             else
 602                 snapdev="${dev}"
 603             fi
 604             if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}" ; then
 605                 log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 606                 return 1
 607             else
 608                 if [ -n "${snapfile}" ]; then
 609                      # it was a loop device, user confused
 610                      umount ${snapdev}
 611                 fi
 612             fi
 613         else
 614             log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 615             return 1
 616         fi
 617     fi
 618     echo "export ${snap_type}SNAP="${snap_mount}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
 619     return 0
 620 }
 621
 622 setup_unionfs() {
 623     image_directory="$1"
 624     rootmnt="$2"
 625
 626     modprobe "${MP_QUIET}" -b ${UNIONTYPE}
 627
 628     # run-init can't deal with images in a subdir, but we're going to
 629     # move all of these away before it runs anyway.  No, we're not,
 630     # put them in / since move-mounting them into / breaks mono and
 631     # some other apps.
 632
 633     croot="/"
 634
 635     # Let's just mount the read-only file systems first
 636     rofsstring=""
 637     rofslist=""
 638     minor_kernel_version=`uname -r|cut -c 5-|sed 's/[^0-9].*//'`
 639     if [ "${NETBOOT}" = "nfs" ] && [ "${minor_kernel_version}" -lt 22 ]; then
 640         # go aroung a bug in nfs-unionfs locking for unionfs <= 1.4
 641         roopt="nfsro"
 642     else
 643         roopt="ro"
 644     fi
 645
 646         # Read image names from ${MODULE}.module if it exists
 647         if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
 648         then
 649                 for IMAGE in `cat ${image_directory}/filesystem.${MODULE}.module`
 650                 do
 651                         image_string="${image_string} ${image_directory}/${image}"
 652                 done
 653         elif [ -e "${image_directory}/${MODULE}.module" ]
 654         then
 655                 for IMAGE in `cat ${image_directory}/${MODULE}.module`
 656                 do
 657                         image_string="${image_string} ${image_directory}/${image}"
 658                 done
 659         else
 660                 # ${MODULE}.module does not exist, create a list of images
 661                 for FILESYSTEM in squashfs ext2 ext3 xfs dir
 662                 do
 663                         for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
 664                         do
 665                                 if [ -e "${IMAGE}" ]
 666                                 then
 667                                         image_string="${image_string} ${IMAGE}"
 668                                 fi
 669                         done
 670                 done
 671
 672                 # Now sort the list
 673                 image_string="`echo ${image_string} | sed -e 's/ /\n/g' | sort `"
 674         fi
 675
 676     mkdir -p "${croot}"
 677     for image in ${image_string}; do
 678         imagename=$(basename "${image}")
 679         if [ -d "${image}" ]; then
 680             # it is a plain directory: do nothing
 681             rofsstring="${image}=${roopt}:${rofsstring}"
 682             rofslist="${image} ${rofslist}"
 683         elif [ -f "${image}" ]; then
 684             backdev=$(get_backing_device "$image")
 685             fstype=$(get_fstype "${backdev}")
 686             if [ "${fstype}" = "unknown" ]; then
 687                 panic "Unknown file system type on ${backdev} (${image})"
 688              fi
 689             mkdir -p "${croot}/${imagename}"
 690             mount -t "${fstype}" -o ro "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
 691         fi
 692     done
 693     rofsstring=${rofsstring%:}
 694
 695     mkdir -p /cow
 696     cowdevice="tmpfs"
 697     cow_fstype="tmpfs"
 698
 699     # Looking for "${root_persistence}" device or file
 700     if [ -n "${PERSISTENT}" ]; then
 701         cowprobe=$(find_cow_device "${root_persistence}")
 702         if [ -b "${cowprobe}" ]; then
 703             cowdevice=${cowprobe}
 704             cow_fstype=$(get_fstype "${cowprobe}")
 705         else
 706             [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent medium"
 707         fi
 708     fi
 709
 710     mount ${cowdevice} -t ${cow_fstype} -o rw /cow || panic "Can not mount $cowdevice on /cow"
 711
 712     mount -t ${UNIONTYPE} -o dirs=/cow=rw:$rofsstring ${UNIONTYPE} "$rootmnt" || panic "${UNIONTYPE} mount failed"
 713
 714     # Adding other custom mounts
 715     if [ -n "${PERSISTENT}" ]; then
 716         # directly mount /home
 717         # FIXME: add a custom mounts configurable system
 718         homecow=$(find_cow_device "${home_persistence}" )
 719         if [ -b "${homecow}" ]; then
 720             mount -t $(get_fstype "${homecow}") -o rw "${homecow}" "${rootmnt}/home"
 721             export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
 722         else
 723             [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
 724         fi
 725         # Look for other snapshots to copy in
 726         try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
 727         try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
 728     fi
 729
 730     if [ -n "${SHOWMOUNTS}" ]; then
 731         for d in ${rofslist}; do
 732             mkdir -p "${rootmnt}/live/${d##*/}"
 733             case d in
 734                 *.dir) # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
 735                     ;;
 736                 *) mount --move "${d}" "${rootmnt}/live/${d##*/}"
 737                     ;;
 738             esac
 739         done
 740     fi
 741
 742     # shows cow fs on /cow for use by live-snapshot
 743     mkdir -p "${rootmnt}/live/cow"
 744     mount -o bind /cow "${rootmnt}/live/cow"
 745 }
 746
 747 check_dev ()
 748 {
 749     sysdev="${1}"
 750     devname="${2}"
 751     if [ -z "${devname}" ]; then
 752         devname=$(sys2dev "${sysdev}")
 753     fi
 754
 755     if [ -n "${LIVE_MEDIA_OFFSET}" ]; then
 756         loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
 757         devname="${loopdevname}"
 758     fi
 759
 760     fstype=$(get_fstype "${devname}")
 761     if is_supported_fs ${fstype}; then
 762         mount -t ${fstype} -o ro "${devname}" $mountpoint || continue
 763         if is_live_path $mountpoint; then
 764             echo $mountpoint
 765             return 0
 766         else
 767             umount $mountpoint
 768         fi
 769     fi
 770
 771     if [ -n "${LIVE_MEDIA_OFFSET}" ]; then
 772         losetup -d "${loopdevname}"
 773     fi
 774     return 1
 775 }
 776
 777 find_livefs() {
 778     timeout="${1}"
 779     # first look at the one specified in the command line
 780     if [ ! -z "${LIVE_MEDIA}" ]; then
 781         if check_dev "null" "${LIVE_MEDIA}"; then
 782             return 0
 783         fi
 784     fi
 785     # don't start autodetection before timeout has expired
 786     if [ -n "${LIVE_MEDIA_TIMEOUT}" ]; then
 787         if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]; then
 788             return 1
 789         fi
 790     fi
 791     # or do the scan of block devices
 792     for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do
 793         devname=$(sys2dev "${sysblock}")
 794         fstype=$(get_fstype "${devname}")
 795         if /lib/udev/cdrom_id ${devname} > /dev/null; then
 796             if check_dev "null" "${devname}" ; then
 797                 return 0
 798             fi
 799         elif is_nice_device "${sysblock}" ; then
 800             for dev in $(subdevices "${sysblock}"); do
 801                 if check_dev "${dev}" ; then
 802                     return 0
 803                 fi
 804             done
 805         elif [ "${fstype}" = "squashfs" -o \
 806                 "${fstype}" = "ext2" -o \
 807                 "${fstype}" = "ext3" ]; then
 808             # This is an ugly hack situation, the block device has
 809             # an image directly on it.  It's hopefully
 810             # live-initramfs, so take it and run with it.
 811             ln -s "${devname}" "${devname}.${fstype}"
 812             echo "${devname}.${fstype}"
 813             return 0
 814         fi
 815     done
 816     return 1
 817 }
 818
 819 pulsate() {
 820     if [ -x /sbin/usplash_write ]; then
 821         /sbin/usplash_write "PULSATE"
 822     fi
 823 }
 824
 825 set_usplash_timeout() {
 826     if [ -x /sbin/usplash_write ]; then
 827         /sbin/usplash_write "TIMEOUT 120"
 828     fi
 829 }
 830
 831 mountroot() {
 832     exec 6>&1
 833     exec 7>&2
 834     exec > live.log
 835     exec 2>&1
 836
 837     Arguments
 838
 839     set_usplash_timeout
 840     [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/live-premount"
 841     pulsate
 842     run_scripts /scripts/live-premount
 843     [ "$quiet" != "y" ] && log_end_msg
 844
 845     # Needed here too because some things (*cough* udev *cough*)
 846     # changes the timeout
 847
 848     set_usplash_timeout
 849
 850     if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ]; then
 851         if do_netmount ; then
 852             livefs_root="${mountpoint}"
 853         else
 854             panic "Unable to find a live file system on the network"
 855         fi
 856     else
 857         # Scan local devices for the image
 858         for i in 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19; do
 859             livefs_root=$(find_livefs $i)
 860             if [ -n "${livefs_root}" ]; then
 861                 break
 862             fi
 863             sleep 1
 864         done
 865     fi
 866
 867     if [ -z "${livefs_root}" ]; then
 868         panic "Unable to find a medium containing a live file system"
 869     fi
 870
 871     if [ "${TORAM}" ]; then
 872         live_dest="ram"
 873     elif [ "${TODISK}" ]; then
 874         live_dest="${TODISK}"
 875     fi
 876     if [ "${live_dest}" ]; then
 877         log_begin_msg "Copying live media to ${live_dest}"
 878         copy_live_to "${livefs_root}" "${live_dest}"
 879         log_end_msg
 880     fi
 881
 882     mount_images_in_directory "${livefs_root}" "${rootmnt}"
 883
 884     log_end_msg
 885
 886     maybe_break live-bottom
 887     [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/live-bottom"
 888
 889     pulsate
 890     run_scripts /scripts/live-bottom
 891     [ "$quiet" != "y" ] && log_end_msg
 892
 893     exec 1>&6 6>&-
 894     exec 2>&7 7>&-
 895     cp live.log "${rootmnt}/var/log/"
 896 }