bko/live/ubuntu/U9.10/casper

   1 #!/bin/sh
   2
   3 # set -e
   4
   5 export PATH=/usr/bin:/usr/sbin:/bin:/sbin
   6
   7 mountpoint=/cdrom
   8 LIVE_MEDIA_PATH=casper
   9
  10 root_persistence="casper-rw"
  11 home_persistence="home-rw"
  12 root_snapshot_label="casper-sn"
  13 home_snapshot_label="home-sn"
  14
  15 USERNAME=casper
  16 USERFULLNAME="Live session user"
  17 HOST=live
  18 BUILD_SYSTEM=Custom
  19
  20 mkdir -p $mountpoint
  21 tried=/tmp/tried
  22
  23 [ -f /etc/casper.conf ] && . /etc/casper.conf
  24 export USERNAME USERFULLNAME HOST BUILD_SYSTEM
  25
  26 . /scripts/casper-helpers
  27
  28 if [ ! -f /casper.vars ]; then
  29     touch /casper.vars
  30 fi
  31
  32 parse_cmdline() {
  33     for x in $(cat /proc/cmdline); do
  34         case $x in
  35             showmounts|show-cow)
  36                 export SHOWMOUNTS='Yes' ;;
  37             persistent)
  38                 export PERSISTENT="Yes" ;;
  39             nopersistent)
  40                 export PERSISTENT="" ;;
  41             union=*)
  42                 export UNIONFS="${x#union=}";;
  43             ip*)
  44                 STATICIP=${x#ip=}
  45                 if [ "${STATICIP}" = "" ]; then
  46                     STATICIP="frommedia"
  47                 fi
  48                 export STATICIP ;;
  49             ignore_uuid)
  50                 IGNORE_UUID="Yes" ;;
  51             live-media-path=*)
  52                 LIVE_MEDIA_PATH="${x#live-media-path=}"
  53                 export LIVE_MEDIA_PATH
  54                 echo "export LIVE_MEDIA_PATH=\"$LIVE_MEDIA_PATH\"" >> /etc/casper.conf ;;
  55         esac
  56     done
  57     if [ "${UNIONFS}" = "" ]; then
  58         export UNIONFS="aufs"
  59     fi
  60 }
  61
  62 is_casper_path() {
  63     path=$1
  64     if [ -d "$path/$LIVE_MEDIA_PATH" ]; then
  65         if [ "$(echo $path/$LIVE_MEDIA_PATH/*.squashfs)" != "$path/$LIVE_MEDIA_PATH/*.squashfs" ] ||
  66             [ "$(echo $path/$LIVE_MEDIA_PATH/*.ext2)" != "$path/$LIVE_MEDIA_PATH/*.ext2" ] ||
  67             [ "$(echo $path/$LIVE_MEDIA_PATH/*.dir)" != "$path/$LIVE_MEDIA_PATH/*.dir" ]; then
  68             return 0
  69         fi
  70     fi
  71     return 1
  72 }
  73
  74 matches_uuid() {
  75     if [ "$IGNORE_UUID" ] || [ ! -e /conf/uuid.conf ]; then
  76         return 0
  77     fi
  78     path="$1"
  79     uuid="$(cat /conf/uuid.conf)"
  80     for try_uuid_file in "$path/.disk/casper-uuid"*; do
  81         [ -e "$try_uuid_file" ] || continue
  82         try_uuid="$(cat "$try_uuid_file")"
  83         if [ "$uuid" = "$try_uuid" ]; then
  84             return 0
  85         fi
  86     done
  87     return 1
  88 }
  89
  90 get_backing_device() {
  91     case "$1" in
  92         *.squashfs|*.ext2)
  93             echo $(setup_loop "$1" "loop" "/sys/block/loop*")
  94             ;;
  95         *.dir)
  96             echo "directory"
  97             ;;
  98         *)
  99             panic "Unrecognized casper filesystem: $1"
 100             ;;
 101     esac
 102 }
 103
 104 match_files_in_dir() {
 105     # Does any files match pattern $1 ?
 106
 107     local pattern="$1"
 108     if [ "$(echo $pattern)" != "$pattern" ]; then
 109         return 0
 110     fi
 111     return 1
 112 }
 113
 114 mount_images_in_directory() {
 115     directory="$1"
 116     rootmnt="$2"
 117     if match_files_in_dir "$directory/$LIVE_MEDIA_PATH/*.squashfs" ||
 118         match_files_in_dir "$directory/$LIVE_MEDIA_PATH/*.ext2" ||
 119         match_files_in_dir "$directory/$LIVE_MEDIA_PATH/*.dir"; then
 120         setup_unionfs "$directory/$LIVE_MEDIA_PATH" "$rootmnt"
 121     else
 122         :
 123     fi
 124 }
 125
 126 is_nice_device() {
 127     sysfs_path="${1#/sys}"
 128     if /lib/udev/path_id "${sysfs_path}" | grep -E -q "ID_PATH=(usb|pci-[^-]*-(ide|scsi|usb)|platform-orion-ehci|platform-mmc|platform-mxsdhci)"; then
 129         return 0
 130     fi
 131     return 1
 132 }
 133
 134 copy_live_to() {
 135     copyfrom="${1}"
 136     copytodev="${2}"
 137     copyto="${copyfrom}_swap"
 138
 139     size=$(fs_size "" ${copyfrom} "used")
 140
 141     if [ "${copytodev}" = "ram" ]; then
 142         # copying to ram:
 143         freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ) )
 144         mount_options="-o size=${size}k"
 145         free_string="memory"
 146         fstype="tmpfs"
 147         dev="/dev/shm"
 148     else
 149         # it should be a writable block device
 150         if [ -b "${copytodev}" ]; then
 151             dev="${copytodev}"
 152             free_string="space"
 153             fstype=$(get_fstype "${dev}")
 154             freespace=$(fs_size "${dev}")
 155         else
 156             [ "$quiet" != "y" ] && log_warning_msg "${copytodev} is not a block device."
 157             return 1
 158         fi
 159     fi
 160     if [ "${freespace}" -lt "${size}" ] ; then
 161         [ "$quiet" != "y" ] && log_warning_msg "Not enough free ${free_string} (${freespace}k > ${size}k) to copy live media in ${copytodev}."
 162         return 1
 163     fi
 164
 165     # begin copying..
 166     mkdir "${copyto}"
 167     echo "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 168     mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 169     cp -a ${copyfrom}/* ${copyto} # "cp -a" from busybox also copies hidden files
 170     umount ${copyfrom}
 171     mount -r -o move ${copyto} ${copyfrom}
 172     rmdir ${copyto}
 173     return 0
 174 }
 175
 176 do_netmount() {
 177     rc=1
 178
 179     modprobe "${MP_QUIET}" af_packet # For DHCP
 180
 181     /sbin/udevadm trigger
 182     /sbin/udevadm settle
 183
 184     ipconfig ${DEVICE} /tmp/net-${DEVICE}.conf | tee /netboot.config
 185
 186     if [ "${NFSROOT}" = "auto" ]; then
 187         NFSROOT=${ROOTSERVER}:${ROOTPATH}
 188     fi
 189
 190     [ "$quiet" != "y" ] && log_begin_msg "Trying netboot from ${NFSROOT}"
 191
 192     if [ "${NETBOOT}" != "nfs" ] && do_cifsmount ; then
 193         rc=0
 194     elif do_nfsmount ; then
 195         NETBOOT="nfs"
 196         export NETBOOT
 197         rc=0
 198     fi
 199
 200     [ "$quiet" != "y" ] && log_end_msg
 201     return ${rc}
 202 }
 203
 204 do_nfsmount() {
 205     rc=1
 206     modprobe "${MP_QUIET}" nfs
 207     if [ -z "${NFSOPTS}" ]; then
 208         NFSOPTS=""
 209     fi
 210
 211     [ "$quiet" != "y" ] && log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 212     # FIXME: This while loop is an ugly HACK round an nfs bug
 213     i=0
 214     while [ "$i" -lt 60 ]; do
 215         nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 216         sleep 1
 217         i="$(($i + 1))"
 218     done
 219     return ${rc}
 220 }
 221
 222 do_cifsmount() {
 223     rc=1
 224     if [ -x "/sbin/mount.cifs" ]; then
 225         if [ -z "${NFSOPTS}" ]; then
 226             CIFSOPTS="-ouser=root,password="
 227         else
 228             CIFSOPTS="${NFSOPTS}"
 229         fi
 230
 231         [ "$quiet" != "y" ] && log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 232         modprobe "${MP_QUIET}" cifs
 233
 234         if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}" ; then
 235             rc=0
 236         fi
 237     fi
 238     return ${rc}
 239 }
 240
 241 do_snap_copy ()
 242 {
 243     fromdev="${1}"
 244     todir="${2}"
 245     snap_type="${3}"
 246
 247     size=$(fs_size "${fromdev}" "" "used")
 248
 249     if [ -b "${fromdev}" ]; then
 250         # look for free mem
 251         if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]; then
 252             todev=$(cat /proc/mounts | grep -s " $(base_path ${todir}) " | awk '{print $1}' )
 253             freespace=$(df -k  | grep -s ${todev} | awk '{print $4}')
 254         else
 255             freespace=$( expr $(awk '/MemFree/{print $2}' /proc/meminfo) + $( cat /proc/meminfo | grep Cached | head -n 1 | awk '/Cached/{print $2}' - ))
 256         fi
 257
 258         tomount="/mnt/tmpsnap"
 259         if [ ! -d "${tomount}" ] ; then
 260             mkdir -p "${tomount}"
 261         fi
 262
 263         fstype=$(get_fstype "${fromdev}")
 264         if [ -n "${fstype}" ]; then
 265             # Copying stuff...
 266             mount -t "${fstype}" -o ro,noatime "${fromdev}" "${tomount}"
 267             cp -a "${tomount}"/* ${todir}
 268             umount "${tomount}"
 269         else
 270             log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 271         fi
 272
 273         rmdir "${tomount}"
 274         if echo ${fromdev} | grep -qs loop; then
 275            losetup -d "${fromdev}"
 276         fi
 277         return 0
 278     else
 279         return 1
 280         [ "$quiet" != "y" ] && log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 281     fi
 282 }
 283
 284 try_snap ()
 285 {
 286     # Look for $snap_label.* in block devices and copy the contents to $snap_mount
 287     #   and remember the device and filename for resync on exit in casper.init
 288
 289     snap_label="${1}"
 290     snap_mount="${2}"
 291     snap_type="${3}"
 292
 293     snapdata=$(find_files "${snap_label}.squashfs ${snap_label}.cpio.gz ${snap_label}.ext2")
 294     if [ ! -z "${snapdata}" ]; then
 295         snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
 296         snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
 297         snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
 298         if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\)'; then
 299             # squashfs or ext2 snapshot
 300             dev=$(get_backing_device "${snapback}/${snapfile}")
 301             if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"; then
 302                  log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 303                  return 1
 304             fi
 305         else
 306             # cpio.gz snapshot
 307             # Unfortunately klibc's cpio is incompatible with the rest of
 308             # the world; everything else requires -u -d, while klibc doesn't
 309             # implement them. Try to detect whether it's in use.
 310             cpiopath="$(which cpio)" || true
 311             if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath"; then
 312                 cpioargs=
 313             else
 314                 cpioargs='-u -d'
 315             fi
 316             if ! (cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | cpio -i $cpioargs 2>/dev/null) ; then
 317                 log_warning_msg "Impossible to include the ${snapfile} Snapshot"
 318                 return 1
 319             fi
 320         fi
 321         umount "${snapback}"
 322     else
 323         dev=$(find_cow_device "${snap_label}")
 324         if [ -b "${dev}" ]; then
 325             if echo "${dev}" | grep -qs loop; then
 326                 # strange things happens, user confused?
 327                 snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
 328                 snapfile=$(basename ${snaploop})
 329                 snapdev=$(cat /proc/mounts | awk '{print $2,$1}' | grep -es "^$( dirname ${snaploop} )" | cut -f2 -d ' ')
 330             else
 331                 snapdev="${dev}"
 332             fi
 333             if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}" ; then
 334                 log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 335                 return 1
 336             else
 337                 if [ -n "${snapfile}" ]; then
 338                      # it was a loop device, user confused
 339                      umount ${snapdev}
 340                 fi
 341             fi
 342         else
 343             log_warning_msg "Impossible to include the ${snap_label} Snapshot"
 344             return 1
 345         fi
 346     fi
 347     echo "export ${snap_type}SNAP="/cow${snap_mount#$rootmnt}":${snapdev}:${snapfile}" >> /etc/casper.conf # for resync on reboot/halt
 348     return 0
 349 }
 350
 351 setup_unionfs() {
 352     image_directory="$1"
 353     rootmnt="$2"
 354
 355     case ${UNIONFS} in
 356         aufs|unionfs)
 357             modprobe "${MP_QUIET}" -b ${UNIONFS} || true
 358             if ! cut -f2 /proc/filesystems | grep -q "^${UNIONFS}\$" && \
 359                [ -x /bin/unionfs-fuse ]; then
 360                 UNIONFS="unionfs-fuse"
 361             fi
 362             ;;
 363     esac
 364
 365     # run-init can't deal with images in a subdir, but we're going to
 366     # move all of these away before it runs anyway.  No, we're not,
 367     # put them in / since move-mounting them into / breaks mono and
 368     # some other apps.
 369
 370     croot="/"
 371
 372     # Let's just mount the read-only file systems first
 373     rofsstring=""
 374     rofslist=""
 375     if [ "${NETBOOT}" = "nfs" ] ; then
 376         roopt="nfsro" # work around a bug in nfs-unionfs locking
 377     elif [ "${UNIONFS}" = "aufs" ]; then
 378         roopt="rr"
 379     elif [ "${UNIONFS}" = "unionfs-fuse" ]; then
 380         roopt="RO"
 381     else
 382         roopt="ro"
 383     fi
 384
 385     mkdir -p "${croot}"
 386     for image_type in "ext2" "squashfs" "dir" ; do
 387         for image in "${image_directory}"/*."${image_type}"; do
 388             imagename=$(basename "${image}")
 389             if [ -d "${image}" ]; then
 390                 # it is a plain directory: do nothing
 391                 rofsstring="${image}=${roopt}:${rofsstring}"
 392                 rofslist="${image} ${rofslist}"
 393             elif [ -f "${image}" ]; then
 394                 backdev=$(get_backing_device "$image")
 395                 fstype=$(get_fstype "${backdev}")
 396                 if [ "${fstype}" = "unknown" ]; then
 397                     panic "Unknown file system type on ${backdev} (${image})"
 398                 fi
 399                 mkdir -p "${croot}/${imagename}"
 400                 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} ${rofslist}"
 401             fi
 402         done
 403     done
 404     rofsstring=${rofsstring%:}
 405
 406     mkdir -p /cow
 407     cowdevice="tmpfs"
 408     cow_fstype="tmpfs"
 409     cow_mountopt="rw,noatime,mode=755"
 410
 411     # Looking for "${root_persistence}" device or file
 412     if [ -n "${PERSISTENT}" ]; then
 413         cowprobe=$(find_cow_device "${root_persistence}")
 414         if [ -b "${cowprobe}" ]; then
 415             cowdevice=${cowprobe}
 416             cow_fstype=$(get_fstype "${cowprobe}")
 417             cow_mountopt="rw,noatime"
 418         else
 419             [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent medium"
 420         fi
 421     fi
 422
 423     mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || panic "Can not mount $cowdevice on /cow"
 424
 425     case ${UNIONFS} in
 426         unionfs-fuse)
 427             (ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:$rofsstring "$rootmnt" || panic "${UNIONFS} mount failed")
 428             mkdir -p /dev/.initramfs/varrun
 429             pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
 430             ;;
 431         *)
 432             mount -t ${UNIONFS} -o noatime,dirs=/cow=rw:$rofsstring ${UNIONFS} "$rootmnt" || panic "${UNIONFS} mount failed"
 433             ;;
 434     esac
 435
 436     # Adding other custom mounts
 437     if [ -n "${PERSISTENT}" ]; then
 438         # directly mount /home
 439         # FIXME: add a custom mounts configurable system
 440         homecow=$(find_cow_device "${home_persistence}" )
 441         if [ -b "${homecow}" ]; then
 442             mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
 443             export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
 444         else
 445             [ "$quiet" != "y" ] && log_warning_msg "Unable to find the persistent home medium"
 446         fi
 447         # Look for other snapshots to copy in
 448         try_snap "${root_snapshot_label}" "${rootmnt}" "ROOT"
 449         try_snap "${home_snapshot_label}" "${rootmnt}/home" "HOME"
 450     fi
 451
 452     if [ -n "${SHOWMOUNTS}" ]; then
 453         for d in ${rofslist}; do
 454             mkdir -p "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
 455             case d in
 456                 *.dir) # do nothing # mount -o bind "${d}" "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
 457                     ;;
 458                 *)
 459                     if [ "${UNIONFS}" = unionfs-fuse ]; then
 460                         mount -o bind "${d}" "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
 461                     else
 462                         mount -o move "${d}" "${rootmnt}/${LIVE_MEDIA_PATH}/${d##*/}"
 463                     fi
 464                     ;;
 465             esac
 466         done
 467         # shows cow fs on /cow for use by casper-snapshot
 468         mkdir -p "${rootmnt}/cow"
 469         mount -o bind /cow "${rootmnt}/cow"
 470     fi
 471
 472     # move the first mount; no head in busybox-initramfs
 473     for d in $(mount -t squashfs | cut -d\  -f 3); do
 474         mkdir -p "${rootmnt}/rofs"
 475         if [ "${UNIONFS}" = unionfs-fuse ]; then
 476             mount -o bind "${d}" "${rootmnt}/rofs"
 477         else
 478             mount -o move "${d}" "${rootmnt}/rofs"
 479         fi
 480         break
 481     done
 482 }
 483
 484 check_dev ()
 485 {
 486     sysdev="${1}"
 487     devname="${2}"
 488     skip_uuid_check="${3}"
 489     if [ -z "${devname}" ]; then
 490         devname=$(sys2dev "${sysdev}")
 491     fi
 492
 493     if [ -d "${devname}" ]; then
 494         mount -o bind "${devname}" $mountpoint || continue
 495         if is_casper_path $mountpoint; then
 496             echo $mountpoint
 497             return 0
 498         else
 499             umount $mountpoint
 500         fi
 501     fi
 502     [ -e "$devname" ] || continue
 503
 504     if [ -n "${LIVEMEDIA_OFFSET}" ]; then
 505         loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVEMEDIA_OFFSET}")
 506         devname="${loopdevname}"
 507     fi
 508
 509     fstype=$(get_fstype "${devname}")
 510     if is_supported_fs ${fstype}; then
 511         devuid=$(blkid -o value -s UUID "$devname")
 512         [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
 513         mount -t ${fstype} -o ro,noatime "${devname}" $mountpoint || continue
 514         [ -n "$devuid" ] && echo "$devuid" >> $tried
 515         if is_casper_path $mountpoint && \
 516            ([ "$skip_uuid_check" ] || matches_uuid $mountpoint); then
 517             echo $mountpoint
 518             return 0
 519         else
 520             umount $mountpoint
 521         fi
 522     fi
 523
 524     if [ -n "${LIVEMEDIA_OFFSET}" ]; then
 525         losetup -d "${loopdevname}"
 526     fi
 527     return 1
 528 }
 529
 530 find_livefs() {
 531     timeout="${1}"
 532     # first look at the one specified in the command line
 533     if [ ! -z "${LIVEMEDIA}" ]; then
 534         if check_dev "null" "${LIVEMEDIA}" "skip_uuid_check"; then
 535             return 0
 536         fi
 537     fi
 538     # don't start autodetection before timeout has expired
 539     if [ -n "${LIVEMEDIA_TIMEOUT}" ]; then
 540         if [ "${timeout}" -lt "${LIVEMEDIA_TIMEOUT}" ]; then
 541             return 1
 542         fi
 543     fi
 544     # or do the scan of block devices
 545     for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|fd)"); do
 546         devname=$(sys2dev "${sysblock}")
 547         [ -e "$devname" ] || continue
 548         fstype=$(get_fstype "${devname}")
 549         if /lib/udev/cdrom_id ${devname} > /dev/null; then
 550             if check_dev "null" "${devname}" ; then
 551                 return 0
 552             fi
 553         elif is_nice_device "${sysblock}" ; then
 554             for dev in $(subdevices "${sysblock}"); do
 555                 if check_dev "${dev}" ; then
 556                     return 0
 557                 fi
 558             done
 559         elif [ "${fstype}" = "squashfs" -o \
 560                 "${fstype}" = "ext4" -o \
 561                 "${fstype}" = "ext3" -o \
 562                 "${fstype}" = "ext2" ]; then
 563             # This is an ugly hack situation, the block device has
 564             # an image directly on it.  It's hopefully
 565             # casper, so take it and run with it.
 566             ln -s "${devname}" "${devname}.${fstype}"
 567             echo "${devname}.${fstype}"
 568             return 0
 569         fi
 570     done
 571     return 1
 572 }
 573
 574 set_usplash_timeout() {
 575     if [ -x /sbin/usplash_write ]; then
 576         /sbin/usplash_write "TIMEOUT 120"
 577     fi
 578 }
 579
 580 mountroot() {
 581     exec 6>&1
 582     exec 7>&2
 583     exec > casper.log
 584     exec 2>&1
 585     tail -f casper.log >&7 &
 586     tailpid="$!"
 587
 588     parse_cmdline
 589
 590     set_usplash_timeout
 591     [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
 592     run_scripts /scripts/casper-premount
 593     [ "$quiet" != "y" ] && log_end_msg
 594
 595     # Needed here too because some things (*cough* udev *cough*)
 596     # changes the timeout
 597
 598     set_usplash_timeout
 599
 600     if [ ! -z "${NETBOOT}" ]; then
 601         if do_netmount ; then
 602             livefs_root="${mountpoint}"
 603         else
 604             panic "Unable to find a live file system on the network"
 605         fi
 606     else
 607         # Scan local devices for the image
 608         i=0
 609         while [ "$i" -lt 60 ]; do
 610             livefs_root=$(find_livefs $i)
 611             if [ "${livefs_root}" ]; then
 612                 break
 613             fi
 614             sleep 1
 615             i="$(($i + 1))"
 616         done
 617     fi
 618
 619     if [ -z "${livefs_root}" ]; then
 620         panic "Unable to find a medium containing a live file system"
 621     fi
 622
 623     if [ "${TORAM}" ]; then
 624         live_dest="ram"
 625     elif [ "${TODISK}" ]; then
 626         live_dest="${TODISK}"
 627     fi
 628     if [ "${live_dest}" ]; then
 629         log_begin_msg "Copying live_media to ${live_dest}"
 630         copy_live_to "${livefs_root}" "${live_dest}"
 631         log_end_msg
 632     fi
 633
 634     mount_images_in_directory "${livefs_root}" "${rootmnt}"
 635
 636     log_end_msg
 637
 638     # unionfs-fuse needs /dev to be bind-mounted for the duration of
 639     # casper-bottom; udev's init script will take care of things after that
 640     if [ "${UNIONFS}" = unionfs-fuse ]; then
 641         mount -n -o bind /dev "${rootmnt}/dev"
 642     fi
 643
 644     maybe_break casper-bottom
 645     [ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-bottom"
 646
 647     run_scripts /scripts/casper-bottom
 648     [ "$quiet" != "y" ] && log_end_msg
 649
 650     if [ "${UNIONFS}" = unionfs-fuse ]; then
 651         umount "${rootmnt}/dev"
 652     fi
 653
 654     exec 1>&6 6>&-
 655     exec 2>&7 7>&-
 656     kill "$tailpid"
 657     cp casper.log "${rootmnt}/var/log/"
 658     if [ -f /etc/casper.conf ]; then
 659         cp /etc/casper.conf "${rootmnt}/etc/"
 660     fi
 661 }