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 alt_mountpoint="/media"
  12 LIVE_MEDIA_PATH="live"
  13
  14 root_persistence="live-rw"
  15 home_persistence="home-rw"
  16 root_snapshot_label="live-sn"
  17 home_snapshot_label="home-sn"
  18
  19 USERNAME="user"
  20 USERFULLNAME="Live user"
  21 HOSTNAME="host"
  22
  23 mkdir -p "${mountpoint}"
  24 tried="/tmp/tried"
  25
  26 # Create /etc/mtab for debug purpose and future syncs
  27 if [ ! -d /etc ]
  28 then
  29         mkdir /etc/
  30 fi
  31
  32 if [ ! -f /etc/mtab ]
  33 then
  34         touch /etc/mtab
  35 fi
  36
  37 . /scripts/live-helpers
  38
  39 if [ ! -f /live.vars ]
  40 then
  41         touch /live.vars
  42 fi
  43
  44 Arguments ()
  45 {
  46         PRESEEDS=""
  47         LOCATIONS=""
  48
  49         for ARGUMENT in $(cat /proc/cmdline)
  50         do
  51                 case "${ARGUMENT}" in
  52                         skipconfig)
  53                                 NOACCESSIBILITY="Yes"
  54                                 NOFASTBOOT="Yes"
  55                                 NOFSTAB="Yes"
  56                                 NONETWORKING="Yes"
  57
  58                                 export NOACCESSIBILITY NOFASTBOOT NOFSTAB NONETWORKING
  59                                 ;;
  60
  61                         access=*)
  62                                 ACCESS="${ARGUMENT#access=}"
  63                                 export ACCESS
  64                                 ;;
  65
  66                         console=*)
  67                                 DEFCONSOLE="${ARGUMENT#*=}"
  68                                 export DEFCONSOLE
  69                                 ;;
  70
  71                         BOOTIF=*)
  72                                 BOOTIF="${x#BOOTIF=}"
  73                                 ;;
  74
  75                         debug)
  76                                 DEBUG="Yes"
  77                                 export DEBUG
  78
  79                                 set -x
  80                                 ;;
  81
  82                         dhcp)
  83                                 # Force dhcp even while netbooting
  84                                 # Use for debugging in case somebody works on fixing dhclient
  85                                 DHCP="Force";
  86                                 export DHCP
  87                                 ;;
  88
  89                         nodhcp)
  90                                 unset DHCP
  91                                 ;;
  92
  93                         ethdevice=*)
  94                                 DEVICE="${ARGUMENT#ethdevice=}"
  95                                 ETHDEVICE="${DEVICE}"
  96                                 export DEVICE ETHDEVICE
  97                                 ;;
  98
  99                         ethdevice-timeout=*)
 100                                 ETHDEV_TIMEOUT="${ARGUMENT#ethdevice-timeout=}"
 101                                 export ETHDEV_TIMEOUT
 102                                 ;;
 103
 104                         fetch=*)
 105                                 FETCH="${ARGUMENT#fetch=}"
 106                                 export FETCH
 107                                 ;;
 108
 109                         forcepersistentfsck)
 110                                 FORCEPERSISTENTFSCK="Yes"
 111                                 export FORCEPERSISTENTFSCK
 112                                 ;;
 113
 114                         ftpfs=*)
 115                                 FTPFS="${ARGUMENT#ftpfs=}"
 116                                 export FTPFS
 117                                 ;;
 118
 119                         httpfs=*)
 120                                 HTTPFS="${ARGUMENT#httpfs=}"
 121                                 export HTTPFS
 122                                 ;;
 123
 124                         iscsi=*)
 125                                 ISCSI="${ARGUMENT#iscsi=}"
 126                                 #ip:port - separated by ;
 127                                 ISCSI_PORTAL="${ISCSI%;*}"
 128                                 if echo "${ISCSI_PORTAL}" | grep -q , ; then
 129                                         ISCSI_SERVER="${ISCSI_PORTAL%,*}"
 130                                         ISCSI_PORT="${ISCSI_PORTAL#*,}"
 131                                 fi
 132                                 #target name
 133                                 ISCSI_TARGET="${ISCSI#*;}"
 134                                 export ISCSI ISCSI_PORTAL ISCSI_TARGET ISCSI_SERVER ISCSI_PORT
 135                                 ;;
 136
 137                         isofrom=*|fromiso=*)
 138                                 FROMISO="${ARGUMENT#*=}"
 139                                 export FROMISO
 140                                 ;;
 141
 142                         ignore_uuid)
 143                                 IGNORE_UUID="Yes"
 144                                 export IGNORE_UUID
 145                                 ;;
 146
 147                         integrity-check)
 148                                 INTEGRITY_CHECK="Yes"
 149                                 export INTEGRITY_CHECK
 150                                 ;;
 151
 152                         ip=*)
 153                                 STATICIP="${ARGUMENT#ip=}"
 154
 155                                 if [ -z "${STATICIP}" ]
 156                                 then
 157                                         STATICIP="frommedia"
 158                                 fi
 159
 160                                 export STATICIP
 161                                 ;;
 162
 163                         live-getty)
 164                                 LIVE_GETTY="1"
 165                                 export LIVE_GETTY
 166                                 ;;
 167
 168                         live-media=*|bootfrom=*)
 169                                 LIVE_MEDIA="${ARGUMENT#*=}"
 170                                 export LIVE_MEDIA
 171                                 ;;
 172
 173                         live-media-encryption=*|encryption=*)
 174                                 LIVE_MEDIA_ENCRYPTION="${ARGUMENT#*=}"
 175                                 export LIVE_MEDIA_ENCRYPTION
 176                                 ;;
 177
 178                         live-media-offset=*)
 179                                 LIVE_MEDIA_OFFSET="${ARGUMENT#live-media-offset=}"
 180                                 export LIVE_MEDIA_OFFSET
 181                                 ;;
 182
 183                         live-media-path=*)
 184                                 LIVE_MEDIA_PATH="${ARGUMENT#live-media-path=}"
 185                                 export LIVE_MEDIA_PATH
 186                                 ;;
 187
 188                         live-media-timeout=*)
 189                                 LIVE_MEDIA_TIMEOUT="${ARGUMENT#live-media-timeout=}"
 190                                 export LIVE_MEDIA_TIMEOUT
 191                                 ;;
 192
 193                         module=*)
 194                                 MODULE="${ARGUMENT#module=}"
 195                                 export MODULE
 196                                 ;;
 197
 198                         netboot=*)
 199                                 NETBOOT="${ARGUMENT#netboot=}"
 200                                 export NETBOOT
 201                                 ;;
 202
 203                         nfsopts=*)
 204                                 NFSOPTS="${ARGUMENT#nfsopts=}"
 205                                 export NFSOPTS
 206                                 ;;
 207
 208                         nfscow=*)
 209                                 NFS_COW="${ARGUMENT#nfscow=}"
 210                                 export NFS_COW
 211                                 ;;
 212
 213                         noaccessibility)
 214                                 NOACCESSIBILITY="Yes"
 215                                 export NOACCESSIBILITY
 216                                 ;;
 217
 218                         nofastboot)
 219                                 NOFASTBOOT="Yes"
 220                                 export NOFASTBOOT
 221                                 ;;
 222
 223                         nofstab)
 224                                 NOFSTAB="Yes"
 225                                 export NOFSTAB
 226                                 ;;
 227
 228                         nonetworking)
 229                                 NONETWORKING="Yes"
 230                                 export NONETWORKING
 231                                 ;;
 232
 233                         ramdisk-size=*)
 234                                 ramdisk_size="${ARGUMENT#ramdisk-size=}"
 235                                 ;;
 236
 237                         swapon)
 238                                 SWAPON="Yes"
 239                                 export SWAPON
 240                                 ;;
 241
 242                         persistent)
 243                                 PERSISTENT="Yes"
 244                                 export PERSISTENT
 245                                 ;;
 246
 247                         persistent=*)
 248                                 PERSISTENT="${ARGUMENT#persistent=}"
 249                                 if [ -z "${PERSISTENT}" ]
 250                                 then
 251                                         PERSISTENT="Yes"
 252                                 fi
 253                                 export PERSISTENT
 254                                 ;;
 255
 256                         persistent-path=*)
 257                                 PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
 258                                 export PERSISTENT_PATH
 259                                 ;;
 260
 261                         persistent-subtext=*)
 262                                 root_persistence="${root_persistence}-${ARGUMENT#persistent-subtext=}"
 263                                 home_persistence="${home_persistence}-${ARGUMENT#persistent-subtext=}"
 264                                 root_snapshot_label="${root_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 265                                 home_snapshot_label="${home_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 266                                 ;;
 267
 268                         nopersistent)
 269                                 NOPERSISTENT="Yes"
 270                                 export NOPERSISTENT
 271                                 ;;
 272
 273                         noprompt)
 274                                 NOPROMPT="Yes"
 275                                 export NOPROMPT
 276                                 ;;
 277
 278                         noprompt=*)
 279                                 NOPROMPT="${ARGUMENT#noprompt=}"
 280                                 export NOPROMPT
 281                                 ;;
 282
 283                         quickusbmodules)
 284                                 QUICKUSBMODULES="Yes"
 285                                 export QUICKUSBMODULES
 286                                 ;;
 287
 288                         preseed/file=*|file=*)
 289                                 LOCATIONS="${ARGUMENT#*=} ${LOCATIONS}"
 290                                 export LOCATIONS
 291                                 ;;
 292
 293                         nopreseed)
 294                                 NOPRESEED="Yes"
 295                                 export NOPRESEED
 296                                 ;;
 297
 298                         */*=*)
 299                                 question="${ARGUMENT%%=*}"
 300                                 value="${ARGUMENT#*=}"
 301                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 302                                 export PRESEEDS
 303                                 ;;
 304
 305                         showmounts)
 306                                 SHOWMOUNTS="Yes"
 307                                 export SHOWMOUNTS
 308                                 ;;
 309
 310                         silent)
 311                                 SILENT="Yes"
 312                                 export SILENT
 313                                 ;;
 314
 315                         todisk=*)
 316                                 TODISK="${ARGUMENT#todisk=}"
 317                                 export TODISK
 318                                 ;;
 319
 320                         toram)
 321                                 TORAM="Yes"
 322                                 export TORAM
 323                                 ;;
 324
 325                         toram=*)
 326                                 TORAM="Yes"
 327                                 MODULETORAM="${ARGUMENT#toram=}"
 328                                 export TORAM MODULETORAM
 329                                 ;;
 330
 331                         exposedroot)
 332                                 EXPOSED_ROOT="Yes"
 333                                 export EXPOSED_ROOT
 334                                 ;;
 335
 336                         plainroot)
 337                                 PLAIN_ROOT="Yes"
 338                                 export PLAIN_ROOT
 339                                 ;;
 340
 341                         skipunion)
 342                                 SKIP_UNION_MOUNTS="Yes"
 343                                 export SKIP_UNION_MOUNTS
 344                                 ;;
 345
 346                         root=*)
 347                                 ROOT="${ARGUMENT#root=}"
 348                                 export ROOT
 349                                 ;;
 350
 351                         union=*)
 352                                 UNIONTYPE="${ARGUMENT#union=}"
 353                                 export UNIONTYPE
 354                                 ;;
 355                 esac
 356         done
 357
 358         # sort of compatibility with netboot.h from linux docs
 359         if [ -z "${NETBOOT}" ]
 360         then
 361                 if [ "${ROOT}" = "/dev/nfs" ]
 362                 then
 363                         NETBOOT="nfs"
 364                         export NETBOOT
 365                 elif [ "${ROOT}" = "/dev/cifs" ]
 366                 then
 367                         NETBOOT="cifs"
 368                         export NETBOOT
 369                 fi
 370         fi
 371
 372         if [ -z "${MODULE}" ]
 373         then
 374                 MODULE="filesystem"
 375                 export MODULE
 376         fi
 377
 378         if [ -z "${UNIONTYPE}" ]
 379         then
 380                 UNIONTYPE="aufs"
 381                 export UNIONTYPE
 382         fi
 383 }
 384
 385 is_live_path ()
 386 {
 387         DIRECTORY="${1}"
 388
 389         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 390         then
 391                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
 392                 do
 393                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 394                         then
 395                                 return 0
 396                         fi
 397                 done
 398         fi
 399
 400         return 1
 401 }
 402
 403 matches_uuid ()
 404 {
 405         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 406         then
 407                 return 0
 408         fi
 409
 410         path="${1}"
 411         uuid="$(cat /conf/uuid.conf)"
 412
 413         for try_uuid_file in "${path}/.disk/live-uuid"*
 414         do
 415                 [ -e "${try_uuid_file}" ] || continue
 416
 417                 try_uuid="$(cat "${try_uuid_file}")"
 418
 419                 if [ "${uuid}" = "${try_uuid}" ]
 420                 then
 421                         return 0
 422                 fi
 423         done
 424
 425         return 1
 426 }
 427
 428 get_backing_device ()
 429 {
 430         case "${1}" in
 431                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 432                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 433                         ;;
 434
 435                 *.dir)
 436                         echo "directory"
 437                         ;;
 438
 439                 *)
 440                         panic "Unrecognized live filesystem: ${1}"
 441                         ;;
 442         esac
 443 }
 444
 445 match_files_in_dir ()
 446 {
 447         # Does any files match pattern ${1} ?
 448         local pattern="${1}"
 449
 450         if [ "$(echo ${pattern})" != "${pattern}" ]
 451         then
 452                 return 0
 453         fi
 454
 455         return 1
 456 }
 457
 458 mount_images_in_directory ()
 459 {
 460         directory="${1}"
 461         rootmnt="${2}"
 462         mac="${3}"
 463
 464
 465         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 466                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 467                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 468                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 469                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 470                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 471         then
 472                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 473                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 474         else
 475                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 476         fi
 477 }
 478
 479 is_nice_device ()
 480 {
 481         sysfs_path="${1#/sys}"
 482
 483         if /lib/udev/path_id "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-|platform-sata_mv|platform-orion-ehci|platform-mmc|platform-mxsdhci|)"
 484         then
 485                 return 0
 486         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 487         then
 488                 return 0
 489         elif echo ${sysfs_path} | grep -q "^/block/dm-"
 490         then
 491                 return 0
 492         fi
 493
 494         return 1
 495 }
 496
 497 copy_live_to ()
 498 {
 499         copyfrom="${1}"
 500         copytodev="${2}"
 501         copyto="${copyfrom}_swap"
 502
 503         if [ -z "${MODULETORAM}" ]
 504         then
 505                 size=$(fs_size "" ${copyfrom}/${LIVE_MEDIA_PATH} "used")
 506         else
 507                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 508
 509                 if [ -f "${MODULETORAMFILE}" ]
 510                 then
 511                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 512                 else
 513                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 514                         return 1
 515                 fi
 516         fi
 517
 518         if [ "${copytodev}" = "ram" ]
 519         then
 520                 # copying to ram:
 521                 freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
 522                 mount_options="-o size=${size}k"
 523                 free_string="memory"
 524                 fstype="tmpfs"
 525                 dev="/dev/shm"
 526         else
 527                 # it should be a writable block device
 528                 if [ -b "${copytodev}" ]
 529                 then
 530                         dev="${copytodev}"
 531                         free_string="space"
 532                         fstype=$(get_fstype "${dev}")
 533                         freespace=$(fs_size "${dev}")
 534                 else
 535                         log_warning_msg "${copytodev} is not a block device."
 536                         return 1
 537                 fi
 538         fi
 539
 540         if [ "${freespace}" -lt "${size}" ]
 541         then
 542                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 543                 return 1
 544         fi
 545
 546         # Custom ramdisk size
 547         if [ -z "${mount_options}" ] && [ -n "${ramdisk_size}" ]
 548         then
 549                 # FIXME: should check for wrong values
 550                 mount_options="-o size=${ramdisk_size}"
 551         fi
 552
 553         # begin copying (or uncompressing)
 554         mkdir "${copyto}"
 555         log_begin_msg "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 556         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 557
 558         if [ "${extension}" = "tgz" ]
 559         then
 560                 cd "${copyto}"
 561                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 562                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 563                 mount -r -o move "${copyto}" "${rootmnt}"
 564                 cd "${OLDPWD}"
 565         else
 566                 if [ -n "${MODULETORAMFILE}" ]
 567                 then
 568                         if [ -x /bin/rsync ]
 569                         then
 570                                 echo " * Copying $MODULETORAMFILE to RAM" 1>/dev/console
 571                                 rsync -a --progress ${MODULETORAMFILE} ${copyto} 1>/dev/console # copy only the filesystem module
 572                         else
 573                                 cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 574                         fi
 575                 else
 576                         if [ -x /bin/rsync ]
 577                         then
 578                                 echo " * Copying whole medium to RAM" 1>/dev/console
 579                                 rsync -a --progress ${copyfrom}/* ${copyto} 1>/dev/console  # "cp -a" from busybox also copies hidden files
 580                         else
 581                                 mkdir -p ${copyto}/${LIVE_MEDIA_PATH}
 582                                 cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/* ${copyto}/${LIVE_MEDIA_PATH}
 583                                 if [ -e ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ]
 584                                 then
 585                                         cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ${copyto}
 586                                 fi
 587                         fi
 588                 fi
 589
 590                 umount ${copyfrom}
 591                 mount -r -o move ${copyto} ${copyfrom}
 592         fi
 593
 594         rmdir ${copyto}
 595         return 0
 596 }
 597
 598 do_netsetup ()
 599 {
 600         modprobe -q af_packet # For DHCP
 601
 602         udevadm trigger
 603         udevadm settle
 604
 605         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
 606         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
 607
 608         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && \
 609            [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
 610         then
 611
 612
 613         # support for Syslinux IPAPPEND parameter
 614         # it sets the BOOTIF variable on the kernel parameter
 615
 616         if [ -n "${BOOTIF}" ]
 617         then
 618                 # pxelinux sets BOOTIF to a value based on the mac address of the
 619                 # network card used to PXE boot, so use this value for DEVICE rather
 620                 # than a hard-coded device name from initramfs.conf. this facilitates
 621                 # network booting when machines may have multiple network cards.
 622                 # pxelinux sets BOOTIF to 01-$mac_address
 623
 624                 # strip off the leading "01-", which isn't part of the mac
 625                 # address
 626                 temp_mac=${BOOTIF#*-}
 627
 628                 # convert to typical mac address format by replacing "-" with ":"
 629                 bootif_mac=""
 630                 IFS='-'
 631                 for x in $temp_mac
 632                 do
 633                         if [ -z "$bootif_mac" ]
 634                         then
 635                                 bootif_mac="$x"
 636                         else
 637                                 bootif_mac="$bootif_mac:$x"
 638                         fi
 639                 done
 640                 unset IFS
 641
 642                 # look for devices with matching mac address, and set DEVICE to
 643                 # appropriate value if match is found.
 644
 645                 for device in /sys/class/net/*
 646                 do
 647                         if [ -f "$device/address" ]
 648                         then
 649                                 current_mac=$(cat "$device/address")
 650
 651                                 if [ "$bootif_mac" = "$current_mac" ]
 652                                 then
 653                                         DEVICE=${device##*/}
 654                                         break
 655                                 fi
 656                         fi
 657                 done
 658         fi
 659
 660         # if ethdevice was not specified on the kernel command line
 661         # make sure we try to get a working network configuration
 662         # for *every* present network device (except for loopback of course)
 663         if [ -z "$ETHDEVICE" ] ; then
 664                 echo "If you want to boot from a specific device use bootoption ethdevice=..."
 665                 for device in /sys/class/net/*; do
 666                         dev=${device##*/} ;
 667                         if [ "$dev" != "lo" ] ; then
 668                                 ETHDEVICE="$ETHDEVICE $dev"
 669                         fi
 670                 done
 671         fi
 672
 673         # split args of ethdevice=eth0,eth1 into "eth0 eth1"
 674         for device in $(echo $ETHDEVICE | sed 's/,/ /g') ; do
 675                 devlist="$devlist $device"
 676         done
 677
 678         # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
 679         # an endless loop; iff execution fails give it two further tries, that's
 680         # why we use '$devlist $devlist $devlist' for the other for loop
 681         for dev in $devlist $devlist $devlist ; do
 682                 echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
 683                 ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
 684                 jobid=$!
 685                 sleep "$ETHDEV_TIMEOUT" ; sleep 1
 686                 if [ -r /proc/"$jobid"/status ] ; then
 687                         echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
 688                         kill -9 $jobid
 689                 fi
 690
 691                 # if configuration of device worked we should have an assigned
 692                 # IP address, iff so let's use the according as $DEVICE for later usage
 693                 # simple and primitive approach which seems to work fine
 694                 if ifconfig $dev | grep -q 'inet.*addr:' ; then
 695                         export DEVICE="$dev"
 696                         break
 697                 fi
 698         done
 699
 700         else
 701                 for interface in ${DEVICE}; do
 702                         ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
 703                         [ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
 704                         if [ "$IPV4ADDR" != "0.0.0.0" ]
 705                         then
 706                                 break
 707                         fi
 708                 done
 709         fi
 710
 711         for interface in ${DEVICE}; do
 712                 # source relevant ipconfig output
 713                 OLDHOSTNAME=${HOSTNAME}
 714                 [ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
 715                 [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 716                 export HOSTNAME
 717
 718                 if [ -n "${interface}" ]
 719                 then
 720                         HWADDR="$(cat /sys/class/net/${interface}/address)"
 721                 fi
 722
 723                 if [ ! -e "/etc/resolv.conf" ]
 724                 then
 725                         echo "Creating /etc/resolv.conf"
 726
 727                         if [ -n "${DNSDOMAIN}" ]
 728                         then
 729                                 echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
 730                                 echo "search ${DNSDOMAIN}" > /etc/resolv.conf
 731                         fi
 732
 733                         for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
 734                         do
 735                                 echo "nameserver $i" >> /etc/resolv.conf
 736                         done
 737                 fi
 738
 739                 # Check if we have a network device at all
 740                 if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
 741                    ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 742                    ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 743                    ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 744                    ! ls /sys/class/net/ra0 > /dev/null 2>&1
 745                 then
 746                         panic "No supported network device found, maybe a non-mainline driver is required."
 747                 fi
 748         done
 749 }
 750
 751 do_netmount()
 752 {
 753         do_netsetup
 754
 755         if [ "${NFSROOT}" = "auto" ]
 756         then
 757                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 758         fi
 759
 760         rc=1
 761
 762         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] )
 763         then
 764                 do_httpmount
 765                 return $?
 766         fi
 767
 768         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 769         then
 770                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 771         fi
 772
 773         log_begin_msg "Trying netboot from ${NFSROOT}"
 774
 775         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 776         then
 777                 rc=0
 778         elif do_nfsmount
 779         then
 780                 NETBOOT="nfs"
 781                 export NETBOOT
 782                 rc=0
 783         fi
 784
 785         log_end_msg
 786         return ${rc}
 787 }
 788
 789 do_iscsi()
 790 {
 791         do_netsetup
 792         #modprobe ib_iser
 793         modprobe iscsi_tcp
 794         local debugopt=""
 795         [ "${DEBUG}" == "Yes" ] && debugopt="-d 8"
 796         #FIXME this name is supposed to be unique - some date + ifconfig hash?
 797         ISCSI_INITIATORNAME="iqn.1993-08.org.debian.live:01:$(echo "${HWADDR}" | sed -e s/://g)"
 798         export ISCSI_INITIATORNAME
 799         if [ -n "${ISCSI_SERVER}" ] ; then
 800                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_SERVER}" -p "${ISCSI_PORT}"
 801         else
 802                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_PORTAL}" -p 3260
 803         fi
 804         if [ $? != 0 ]
 805         then
 806                 panic "Failed to log into iscsi target"
 807         fi
 808         local host="$(ls -d /sys/class/scsi_host/host*/device/iscsi_host:host* \
 809                             /sys/class/scsi_host/host*/device/iscsi_host/host* | sed -e 's:/device.*::' -e 's:.*host::')"
 810         if [ -n "${host}" ]
 811         then
 812                 local devices=""
 813                 local i=0
 814                 while [ -z "${devices}" -a $i -lt 60 ]
 815                 do
 816                         sleep 1
 817                         devices="$(ls -d /sys/class/scsi_device/${host}*/device/block:* \
 818                                          /sys/class/scsi_device/${host}*/device/block/* | sed -e 's!.*[:/]!!')"
 819                         i=$(expr $i + 1)
 820                         echo -ne $i\\r
 821                 done
 822                 for dev in $devices
 823                 do
 824                         if check_dev "null" "/dev/$dev"
 825                         then
 826                                 NETBOOT="iscsi"
 827                                 export NETBOOT
 828                                 return 0;
 829                         fi
 830                 done
 831                 panic "Failed to locate a live device on iSCSI devices (tried: $devices)."
 832         else
 833                 panic "Failed to locate iSCSI host in /sys"
 834         fi
 835 }
 836
 837 do_httpmount ()
 838 {
 839         rc=1
 840
 841         for webfile in HTTPFS FTPFS FETCH
 842         do
 843                 local url="$(eval echo \"\$\{${webfile}\}\")"
 844                 local extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
 845
 846                 if [ -n "$url" ]
 847                 then
 848                         case "${extension}" in
 849                                 iso|squashfs|tgz|tar)
 850                                         if [ "${extension}" = "iso" ]
 851                                         then
 852                                                 mkdir -p "${alt_mountpoint}"
 853                                                 dest="${alt_mountpoint}"
 854                                         else
 855                                                 local dest="${mountpoint}/${LIVE_MEDIA_PATH}"
 856                                                 mount -t ramfs ram "${mountpoint}"
 857                                                 mkdir -p "${dest}"
 858                                         fi
 859                                         if [ "${webfile}" = "FETCH" ]
 860                                         then
 861                                                 case "$url" in
 862                                                         tftp*)
 863                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
 864                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
 865                                                                 lfile="$(basename $url)"
 866                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
 867                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
 868                                                         ;;
 869
 870                                                         *)
 871                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
 872                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
 873                                                                 ;;
 874                                                 esac
 875                                         else
 876                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
 877                                                 if [ "${webfile}" = "FTPFS" ]
 878                                                 then
 879                                                         FUSE_MOUNT="curlftpfs"
 880                                                         url="$(dirname ${url})"
 881                                                 else
 882                                                         FUSE_MOUNT="httpfs"
 883                                                 fi
 884                                                 modprobe fuse
 885                                                 $FUSE_MOUNT "${url}" "${dest}"
 886                                                 ROOT_PID="$(minips h -C "$FUSE_MOUNT" | { read x y ; echo "$x" ; } )"
 887                                         fi
 888                                         [ ${?} -eq 0 ] && rc=0
 889                                         [ "${extension}" = "tgz" ] && live_dest="ram"
 890                                         if [ "${extension}" = "iso" ]
 891                                         then
 892                                                 isoloop=$(setup_loop "${dest}/$(basename "${url}")" "loop" "/sys/block/loop*" "" '')
 893                                                 mount -t iso9660 "${isoloop}" "${mountpoint}"
 894                                                 rc=${?}
 895                                         fi
 896                                         break
 897                                         ;;
 898
 899                                 *)
 900                                         log_begin_msg "Unrecognized archive extension for ${url}"
 901                                         ;;
 902                         esac
 903                 fi
 904         done
 905
 906         if [ ${rc} != 0 ]
 907         then
 908                 if [ -d "${alt_mountpoint}" ]
 909                 then
 910                         umount "${alt_mountpoint}"
 911                         rmdir "${alt_mountpoint}"
 912                 fi
 913                 umount "${mountpoint}"
 914         elif [ "${webfile}"  != "FETCH" ] ; then
 915                 NETBOOT="${webfile}"
 916                 export NETBOOT
 917         fi
 918
 919         return ${rc}
 920 }
 921
 922 do_nfsmount ()
 923 {
 924         rc=1
 925
 926         modprobe -q nfs
 927
 928         if [ -z "${NFSOPTS}" ]
 929         then
 930                 NFSOPTS=""
 931         fi
 932
 933         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 934
 935         # FIXME: This while loop is an ugly HACK round an nfs bug
 936         i=0
 937         while [ "$i" -lt 60 ]
 938         do
 939                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 940                 sleep 1
 941                 i="$(($i + 1))"
 942         done
 943
 944         return ${rc}
 945 }
 946
 947 do_cifsmount ()
 948 {
 949         rc=1
 950
 951         if [ -x "/sbin/mount.cifs" ]
 952         then
 953                 if [ -z "${NFSOPTS}" ]
 954                 then
 955                         CIFSOPTS="-ouser=root,password="
 956                 else
 957                         CIFSOPTS="${NFSOPTS}"
 958                 fi
 959
 960                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 961                 modprobe -q cifs
 962
 963                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 964                 then
 965                         rc=0
 966                 fi
 967         fi
 968
 969         return ${rc}
 970 }
 971
 972 do_snap_copy ()
 973 {
 974         fromdev="${1}"
 975         todir="${2}"
 976         snap_type="${3}"
 977         size=$(fs_size "${fromdev}" "" "used")
 978
 979         if [ -b "${fromdev}" ]
 980         then
 981                 log_success_msg "Copying snapshot ${fromdev} to ${todir}..."
 982
 983                 # look for free mem
 984                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 985                 then
 986                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
 987                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
 988                 else
 989                         freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
 990                 fi
 991
 992                 tomount="/mnt/tmpsnap"
 993
 994                 if [ ! -d "${tomount}" ]
 995                 then
 996                         mkdir -p "${tomount}"
 997                 fi
 998
 999                 fstype=$(get_fstype "${fromdev}")
1000
1001                 if [ -n "${fstype}" ]
1002                 then
1003                         # Copying stuff...
1004                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
1005                         cp -a "${tomount}"/* ${todir}
1006                         umount "${tomount}"
1007                 else
1008                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
1009                 fi
1010
1011                 rmdir "${tomount}"
1012
1013                 if echo ${fromdev} | grep -qs loop
1014                 then
1015                         losetup -d "${fromdev}"
1016                 fi
1017
1018                 return 0
1019         else
1020                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
1021                 return 1
1022         fi
1023 }
1024
1025 find_snap ()
1026 {
1027         # Look for ${snap_label}.* in block devices
1028         snap_label="${1}"
1029         black_listed_devices="${2}"
1030
1031         if [ "${PERSISTENT}" != "nofiles" ]
1032         then
1033                 # search for image files
1034                 snapdata=$(find_files "${PERSISTENT_PATH}${snap_label}.squashfs ${PERSISTENT_PATH}${snap_label}.cpio.gz ${PERSISTENT_PATH}${snap_label}.ext2 ${PERSISTENT_PATH}${snap_label}.ext3 ${PERSISTENT_PATH}${snap_label}.ext4 ${PERSISTENT_PATH}${snap_label}.jffs2" "${black_listed_devices}")
1035         fi
1036
1037         if [ -z "${snapdata}" ]
1038         then
1039                 snapdata=$(find_cow_device "${snap_label}" "${black_listed_devices}")
1040         fi
1041         echo "${snapdata}"
1042 }
1043
1044 try_snap ()
1045 {
1046         # copy the contents of previously found snapshot to ${snap_mount}
1047         # and remember the device and filename for resync on exit in live-boot.init
1048
1049         snapdata="${1}"
1050         snap_mount="${2}"
1051         snap_type="${3}"
1052         snap_relpath="${4}"
1053
1054         if [ -z "${snap_relpath}" ]
1055         then
1056                 # root snapshot, default usage
1057                 snap_relpath="/"
1058         else
1059                 # relative snapshot (actually used just for "/home" snapshots)
1060                 snap_mount="${2}${snap_relpath}"
1061         fi
1062
1063         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
1064         then
1065                 log_success_msg "found snapshot: ${snapdata}"
1066                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
1067                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
1068                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
1069
1070                 if ! try_mount "${snapdev}" "${snapback}" "ro"
1071                 then
1072                         break
1073                 fi
1074
1075                 RES="0"
1076
1077                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
1078                 then
1079                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
1080                         dev=$(get_backing_device "${snapback}/${snapfile}")
1081
1082                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1083                         RES="$?"
1084                 else
1085                         # cpio.gz snapshot
1086
1087                         # Unfortunately klibc's cpio is incompatible with the
1088                         # rest of the world; everything else requires -u -d,
1089                         # while klibc doesn't implement them. Try to detect
1090                         # whether it's in use.
1091                         cpiopath="$(which cpio)" || true
1092                         if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath"
1093                         then
1094                                 cpioargs=
1095                         else
1096                                 cpioargs='--unconditional --make-directories'
1097                         fi
1098
1099                         if [ -s "${snapback}/${snapfile}" ]
1100                         then
1101                                 BEFOREDIR="$(pwd)"
1102                                 cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse 2>/dev/null
1103                                 RES="$?"
1104                                 cd "${BEFOREDIR}"
1105                         else
1106                                 log_warning_msg "${snapback}/${snapfile} is empty, adding it for sync on reboot."
1107                                 RES="0"
1108                         fi
1109
1110                         if [ "${RES}" != "0" ]
1111                         then
1112                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse\""
1113                         fi
1114                 fi
1115
1116                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
1117
1118                 if [ "${RES}" != "0" ]
1119                 then
1120                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
1121                 fi
1122
1123         elif [ -b "${snapdata}" ]
1124         then
1125                 # Try to find if it could be a snapshot partition
1126                 dev="${snapdata}"
1127                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
1128                 if echo "${dev}" | grep -qs loop
1129                 then
1130                         # strange things happens, user confused?
1131                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
1132                         snapfile=$(basename ${snaploop})
1133                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
1134                 else
1135                         snapdev="${dev}"
1136                 fi
1137
1138                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1139                 then
1140                         log_warning_msg "Impossible to include the ${snap_type} Snapshot (i)"
1141                         return 1
1142                 else
1143                         if [ -n "${snapfile}" ]
1144                         then
1145                                 # it was a loop device, user confused
1146                                 umount ${snapdev}
1147                         fi
1148                 fi
1149         else
1150                 log_warning_msg "Impossible to include the ${snap_type} Snapshot (o)"
1151                 return 1
1152         fi
1153
1154         echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
1155         return 0
1156 }
1157
1158 setup_unionfs ()
1159 {
1160         image_directory="${1}"
1161         rootmnt="${2}"
1162         addimage_directory="${3}"
1163
1164         case ${UNIONTYPE} in
1165                 aufs|unionfs)
1166                         modprobe -q -b ${UNIONTYPE}
1167
1168                         if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
1169                         then
1170                                 echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
1171                                 echo "This might be really slow."
1172
1173                                 UNIONTYPE="unionfs-fuse"
1174                         fi
1175                         ;;
1176         esac
1177
1178         if [ "${UNIONTYPE}" = unionfs-fuse ]
1179         then
1180                 modprobe fuse
1181         fi
1182
1183         # run-init can't deal with images in a subdir, but we're going to
1184         # move all of these away before it runs anyway.  No, we're not,
1185         # put them in / since move-mounting them into / breaks mono and
1186         # some other apps.
1187
1188         croot="/"
1189
1190         # Let's just mount the read-only file systems first
1191         rofsstring=""
1192         rofslist=""
1193
1194         if [ "${UNIONTYPE}" = "aufs" ]
1195         then
1196                 roopt="rr"
1197                 noxino_opt="noxino,"
1198         elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
1199         then
1200                 roopt="RO"
1201         else
1202                 roopt="ro"
1203         fi
1204
1205         if [ -z "${PLAIN_ROOT}" ]
1206         then
1207                 # Read image names from ${MODULE}.module if it exists
1208                 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1209                 then
1210                         for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1211                         do
1212                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1213                         done
1214                 elif [ -e "${image_directory}/${MODULE}.module" ]
1215                 then
1216                         for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1217                         do
1218                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1219                         done
1220                 else
1221                         # ${MODULE}.module does not exist, create a list of images
1222                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1223                         do
1224                                 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1225                                 do
1226                                         if [ -e "${IMAGE}" ]
1227                                         then
1228                                                 image_string="${image_string} ${IMAGE}"
1229                                         fi
1230                                 done
1231                         done
1232
1233                         if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1234                         then
1235                                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1236                                 do
1237                                         for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1238                                         do
1239                                                 if [ -e "${IMAGE}" ]
1240                                                 then
1241                                                         image_string="${image_string} ${IMAGE}"
1242                                                 fi
1243                                         done
1244                                 done
1245                         fi
1246
1247                         # Now sort the list
1248                         image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1249                 fi
1250
1251         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1252
1253                 mkdir -p "${croot}"
1254
1255                 for image in ${image_string}
1256                 do
1257                         imagename=$(basename "${image}")
1258
1259                         export image devname
1260                         maybe_break live-realpremount
1261                         log_begin_msg "Running /scripts/live-realpremount"
1262                         run_scripts /scripts/live-realpremount
1263                         log_end_msg
1264
1265                         if [ -d "${image}" ]
1266                         then
1267                                 # it is a plain directory: do nothing
1268                                 rofsstring="${image}=${roopt}:${rofsstring}"
1269                                 rofslist="${image} ${rofslist}"
1270                         elif [ -f "${image}" ]
1271                         then
1272                                 if losetup --help 2>&1 | grep -q -- "-r\b"
1273                                 then
1274                                         backdev=$(get_backing_device "${image}" "-r")
1275                                 else
1276                                         backdev=$(get_backing_device "${image}")
1277                                 fi
1278                                 fstype=$(get_fstype "${backdev}")
1279
1280                                 if [ "${fstype}" = "unknown" ]
1281                                 then
1282                                         panic "Unknown file system type on ${backdev} (${image})"
1283                                 fi
1284
1285                                 if [ -z "${fstype}" ]
1286                                 then
1287                                         fstype="${imagename##*.}"
1288                                         log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1289                                 fi
1290
1291                                 if [ "${UNIONTYPE}" != "unionmount" ]
1292                                 then
1293                                         mpoint="${croot}/${imagename}"
1294                                         rofsstring="${mpoint}=${roopt}:${rofsstring}" && rofslist="${mpoint} ${rofslist}"
1295                                 else
1296                                         mpoint="${rootmnt}"
1297                                 fi
1298                                 mkdir -p "${mpoint}"
1299                                 log_begin_msg "Mounting \"${image}\" on \"${mpoint}\" via \"${backdev}\""
1300                                 mount -t "${fstype}" -o ro,noatime "${backdev}" "${mpoint}" || panic "Can not mount ${backdev} (${image}) on ${mpoint}"
1301                                 log_end_msg
1302                         fi
1303                 done
1304         else
1305                 # we have a plain root system
1306                 mkdir -p "${croot}/filesystem"
1307                 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
1308                 mount -t $(get_fstype "${image_directory}") -o ro,noatime "${image_directory}" "${croot}/filesystem" || panic "Can not mount ${image_directory} on ${croot}/filesystem" && rofsstring="${croot}/filesystem=${roopt}:${rofsstring}" && rofslist="${croot}/filesystem ${rofslist}"
1309                 # probably broken:
1310                 mount -o bind ${croot}/filesystem $mountpoint
1311                 log_end_msg
1312         fi
1313
1314         rofsstring=${rofsstring%:}
1315
1316         mkdir -p /cow
1317
1318         # Looking for "${root_persistence}" device or file
1319         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1320         then
1321                 if [ -z "${QUICKUSBMODULES}" ]
1322                 then
1323                         # Load USB modules
1324                         num_block=$(ls -l /sys/block | wc -l)
1325                         for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1326                         do
1327                                 modprobe -q -b ${module}
1328                         done
1329
1330                         udevadm trigger
1331                         udevadm settle
1332
1333                         # For some reason, udevsettle does not block in this scenario,
1334                         # so we sleep for a little while.
1335                         #
1336                         # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1337                         for timeout in 5 4 3 2 1
1338                         do
1339                                 sleep 1
1340
1341                                 if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1342                                 then
1343                                         break
1344                                 fi
1345                         done
1346                 fi
1347
1348                 # search for label and files (this could be hugely optimized)
1349                 cowprobe=$(find_cow_device "${root_persistence}")
1350                 if [ -b "${cowprobe}" ]
1351                 then
1352                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1353                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1354                         # snapshots to be sure to really store some e.g key config files,
1355                         # but not on the same media
1356                         blacklistdev="${cowprobe}"
1357                         PERSISTENCE_IS_ON="1"
1358                         export PERSISTENCE_IS_ON
1359                 fi
1360                 # homecow just mount something on /home, this should be generalized some way
1361                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1362                 if [ -b "${homecow}" ]
1363                 then
1364                         PERSISTENCE_IS_ON="1"
1365                         export PERSISTENCE_IS_ON
1366                 fi
1367                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1368                 # This second type should be removed when snapshot will get smarter,
1369                 # hence when "/etc/live-snapshot*list" will be supported also by
1370                 # ext2|ext3|ext4|jffs2 snapshot types.
1371                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1372
1373                 if [ -b "${cowprobe}" ]
1374                 then
1375                         cowdevice=${cowprobe}
1376                         cow_fstype=$(get_fstype "${cowprobe}")
1377                         cow_mountopt="rw,noatime"
1378
1379                         if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
1380                         then
1381                                 fsck -y ${cowdevice}
1382                         fi
1383                 else
1384                         log_warning_msg "Unable to find the persistent medium"
1385                         cowdevice="tmpfs"
1386                         cow_fstype="tmpfs"
1387                         cow_mountopt="rw,noatime,mode=755"
1388                 fi
1389         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1390         then
1391                 # check if there are any nfs options
1392                 if echo ${NFS_COW}|grep -q ','
1393                 then
1394                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1395                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1396                 else
1397                         nfs_cow_opts="-o nolock"
1398                         nfs_cow=${NFS_COW}
1399                 fi
1400                 mac="$(get_mac)"
1401                 if [ -n "${mac}" ]
1402                 then
1403                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1404                         cow_fstype="nfs"
1405                 else
1406                         panic "unable to determine mac address"
1407                 fi
1408         else
1409                 cowdevice="tmpfs"
1410                 cow_fstype="tmpfs"
1411                 cow_mountopt="rw,noatime,mode=755"
1412         fi
1413
1414         if [ "${UNIONTYPE}" != "unionmount" ]
1415         then
1416
1417         if [ "${cow_fstype}" = "nfs" ]
1418         then
1419                 log_begin_msg \
1420                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1421                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1422                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1423         else
1424                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1425                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1426         fi
1427         fi
1428
1429         rofscount=$(echo ${rofslist} |wc -w)
1430
1431         if [ -n "${EXPOSED_ROOT}" ]
1432         then
1433                 if [ ${rofscount} -ne 1 ]
1434                 then
1435                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1436                 fi
1437                 exposedrootfs=${rofslist%% }
1438
1439                 mount --bind ${exposedrootfs} ${rootmnt} || \
1440                         panic "bind mount of ${exposedrootfs} failed"
1441
1442                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1443                 then
1444                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1445                 else
1446                         cow_dirs=''
1447                 fi
1448
1449                 for dir in ${cow_dirs}; do
1450                         mkdir -p /cow${dir}
1451
1452                         case "${UNIONTYPE}" in
1453                                 unionfs-fuse)
1454                                         (ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:${exposedrootfs}${dir} "${rootmnt}${dir}" || panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option cow,noinitgroups,default_permissions,allow_other,use_ino,suid=/cow=RW:${exposedrootfs}${dir}")
1455                                         mkdir -p /dev/.initramfs/varrun
1456                                         pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1457                                         ;;
1458
1459                                 *)
1460                                         mount -t ${UNIONTYPE} -o rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro ${UNIONTYPE} "${rootmnt}${dir}" || panic "mount ${UNIONTYPE} on ${rootmnt}${dir} failed with option rw,noatime,dirs=/cow${dir}=rw:${exposedrootfs}${dir}=ro"
1461                                         ;;
1462                         esac
1463                 done
1464         else
1465                 case "${UNIONTYPE}" in
1466                         unionfs-fuse)
1467                                 (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 "mount ${UNIONTYPE} on ${rootmnt} failed with option cow,noinitgroups,default_permissions,allow_other,use_ino,suid=/cow:RW:${rofsstring}")
1468                                 mkdir -p /dev/.initramfs/varrun
1469                                 pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1470                                 ;;
1471
1472                         unionmount)
1473                                 mount_full -t ${cow_fstype} -o noatime,union,${cow_mountopt} ${cowdevice} "${rootmnt}" || panic "${UNIONTYPE} ${cowdevice} on ${rootmnt} failed with option noatime,union,${cow_mountopt}"
1474                                 ;;
1475
1476                         *)
1477                                 mount -t ${UNIONTYPE} -o noatime,${noxino_opt}dirs=/cow=rw:${rofsstring} ${UNIONTYPE} "${rootmnt}" || panic "mount ${UNIONTYPE} on ${rootmnt} failed with option noatime,${noxino_opt}dirs=/cow=rw:${rofsstring}"
1478                                 ;;
1479                 esac
1480         fi
1481
1482         # Correct the permissions of /:
1483         chmod 0755 "${rootmnt}"
1484
1485         # tmpfs file systems
1486         touch /etc/fstab
1487         mkdir -p "${rootmnt}/live"
1488         mount -t tmpfs tmpfs ${rootmnt}/live
1489
1490         # Adding other custom mounts
1491         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1492         then
1493                 # directly mount /home
1494                 # FIXME: add a custom mounts configurable system
1495
1496                 if [ -b "${homecow}" ]
1497                 then
1498                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1499                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1500                 else
1501                         log_warning_msg "Unable to find the persistent home medium"
1502                 fi
1503
1504                 # Look for other snapshots to copy in
1505                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1506                 # This second type should be removed when snapshot grow smarter
1507                 try_snap "${home_snapdata}" "${rootmnt}" "HOME" "/home"
1508         fi
1509
1510         if [ -n "${SHOWMOUNTS}" ]
1511         then
1512                 for d in ${rofslist}
1513                 do
1514                         mkdir -p "${rootmnt}/live/${d##*/}"
1515
1516                         case d in
1517                                 *.dir)
1518                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1519                                         ;;
1520
1521                                 *)
1522                                         case "${UNIONTYPE}" in
1523                                                 unionfs-fuse)
1524                                                         mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1525                                                         ;;
1526
1527                                                 *)
1528                                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1529                                                         ;;
1530                                         esac
1531                                         ;;
1532                         esac
1533                 done
1534         fi
1535
1536         # shows cow fs on /cow for use by live-snapshot
1537         mkdir -p "${rootmnt}/live/cow"
1538         mount -o move /cow "${rootmnt}/live/cow" >/dev/null 2>&1 || mount -o bind /cow "${rootmnt}/live/cow" || log_warning_msg "Unable to move or bind /cow to ${rootmnt}/live/cow"
1539 }
1540
1541 check_dev ()
1542 {
1543         sysdev="${1}"
1544         devname="${2}"
1545         skip_uuid_check="${3}"
1546
1547         # support for fromiso=.../isofrom=....
1548         if [ -n "$FROMISO" ]
1549         then
1550                 ISO_DEVICE=$(dirname $FROMISO)
1551                 if ! [ -b $ISO_DEVICE ]
1552                 then
1553                         # to support unusual device names like /dev/cciss/c0d0p1
1554                         # as well we have to identify the block device name, let's
1555                         # do that for up to 15 levels
1556                         i=15
1557                         while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
1558                         do
1559                                 ISO_DEVICE=$(dirname ${ISO_DEVICE})
1560                                 [ -b "$ISO_DEVICE" ] && break
1561                                 i=$(($i -1))
1562                         done
1563                 fi
1564
1565                 if [ "$ISO_DEVICE" = "/" ]
1566                 then
1567                         echo "Warning: device for bootoption isofrom= ($FROMISO) not found.">>/live-boot.log
1568                 else
1569                         mkdir /isofrom
1570                         mount -t auto "$ISO_DEVICE" /isofrom
1571                         ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
1572                         loopdevname=$(setup_loop "/isofrom/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
1573                         devname="${loopdevname}"
1574                 fi
1575         fi
1576
1577         if [ -z "${devname}" ]
1578         then
1579                 devname=$(sys2dev "${sysdev}")
1580         fi
1581
1582         if [ -d "${devname}" ]
1583         then
1584                 mount -o bind "${devname}" $mountpoint || continue
1585
1586                 if is_live_path $mountpoint
1587                 then
1588                         echo $mountpoint
1589                         return 0
1590                 else
1591                         umount $mountpoint
1592                 fi
1593         fi
1594         [ -e "$devname" ] || continue
1595
1596         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1597         then
1598                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1599                 devname="${loopdevname}"
1600         fi
1601
1602         fstype=$(get_fstype "${devname}")
1603
1604         if is_supported_fs ${fstype}
1605         then
1606                 devuid=$(blkid -o value -s UUID "$devname")
1607                 [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
1608                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1609                 [ -n "$devuid" ] && echo "$devuid" >> $tried
1610
1611                 if is_live_path ${mountpoint} && \
1612                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1613                 then
1614                         echo ${mountpoint}
1615                         return 0
1616                 else
1617                         umount ${mountpoint}
1618                 fi
1619         fi
1620
1621         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1622         then
1623                 losetup -d "${loopdevname}"
1624         fi
1625
1626         return 1
1627 }
1628
1629 find_livefs ()
1630 {
1631         timeout="${1}"
1632
1633         # don't start autodetection before timeout has expired
1634         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1635         then
1636                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1637                 then
1638                         return 1
1639                 fi
1640         fi
1641
1642         # first look at the one specified in the command line
1643         case "${LIVE_MEDIA}" in
1644                 removable-usb)
1645                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1646                         do
1647                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1648                                 then
1649                                         if readlink ${sysblock} | grep -q usb
1650                                         then
1651                                                 for dev in $(subdevices "${sysblock}")
1652                                                 do
1653                                                         if check_dev "${dev}"
1654                                                         then
1655                                                                 return 0
1656                                                         fi
1657                                                 done
1658                                         fi
1659                                 fi
1660                         done
1661                         return 1
1662                         ;;
1663
1664                 removable)
1665                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1666                         do
1667                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1668                                 then
1669                                         for dev in $(subdevices "${sysblock}")
1670                                         do
1671                                                 if check_dev "${dev}"
1672                                                 then
1673                                                         return 0
1674                                                 fi
1675                                         done
1676                                 fi
1677                         done
1678                         return 1
1679                         ;;
1680
1681                 *)
1682                         if [ ! -z "${LIVE_MEDIA}" ]
1683                         then
1684                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1685                                 then
1686                                         return 0
1687                                 fi
1688                         fi
1689                         ;;
1690         esac
1691
1692         # or do the scan of block devices
1693         # prefer removable devices over non-removable devices, so scan them first
1694         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | egrep -v "/(loop|ram|dm-|fd)")
1695         do
1696                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1697                 then
1698                         removable_devices_to_scan="$removable_devices_to_scan $sysblock"
1699                 else
1700                         nonremovable_devices_to_scan="$nonremovable_devices_to_scan $sysblock"
1701                 fi
1702         done
1703         devices_to_scan="$removable_devices_to_scan $nonremovable_devices_to_scan"
1704
1705         for sysblock in $devices_to_scan
1706         do
1707                 devname=$(sys2dev "${sysblock}")
1708                 [ -e "$devname" ] || continue
1709                 fstype=$(get_fstype "${devname}")
1710
1711                 if /lib/udev/cdrom_id ${devname} > /dev/null
1712                 then
1713                         if check_dev "null" "${devname}"
1714                         then
1715                                 return 0
1716                         fi
1717                 elif is_nice_device "${sysblock}"
1718                 then
1719                         for dev in $(subdevices "${sysblock}")
1720                         do
1721                                 if check_dev "${dev}"
1722                                 then
1723                                         return 0
1724                                 fi
1725                         done
1726                 elif [ "${fstype}" = "squashfs" -o \
1727                         "${fstype}" = "btrfs" -o \
1728                         "${fstype}" = "ext2" -o \
1729                         "${fstype}" = "ext3" -o \
1730                         "${fstype}" = "ext4" -o \
1731                         "${fstype}" = "jffs2" ]
1732                 then
1733                         # This is an ugly hack situation, the block device has
1734                         # an image directly on it.  It's hopefully
1735                         # live-boot, so take it and run with it.
1736                         ln -s "${devname}" "${devname}.${fstype}"
1737                         echo "${devname}.${fstype}"
1738                         return 0
1739                 fi
1740         done
1741
1742         return 1
1743 }
1744
1745 integrity_check ()
1746 {
1747         media_mountpoint="${1}"
1748
1749         log_begin_msg "Checking media integrity"
1750
1751         cd ${media_mountpoint}
1752         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1753         RC="${?}"
1754
1755         log_end_msg
1756
1757         if [ "${RC}" -eq 0 ]
1758         then
1759                 log_success_msg "Everything ok, will reboot in 10 seconds."
1760                 sleep 10
1761                 cd /
1762                 umount ${media_mountpoint}
1763                 sync
1764                 echo u > /proc/sysrq-trigger
1765                 echo b > /proc/sysrq-trigger
1766         else
1767                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1768         fi
1769 }
1770
1771 mountroot ()
1772 {
1773         if [ -x /scripts/local-top/cryptroot ]; then
1774             /scripts/local-top/cryptroot
1775         fi
1776
1777         exec 6>&1
1778         exec 7>&2
1779         exec > live-boot.log
1780         exec 2>&1
1781         tail -f live-boot.log >&7 &
1782         tailpid="${!}"
1783
1784         # Ensure 'panic' function is overridden
1785         . /scripts/live-functions
1786
1787         Arguments
1788
1789         maybe_break live-premount
1790         log_begin_msg "Running /scripts/live-premount"
1791         run_scripts /scripts/live-premount
1792         log_end_msg
1793
1794         # Needed here too because some things (*cough* udev *cough*)
1795         # changes the timeout
1796
1797         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1798         then
1799                 if do_netmount
1800                 then
1801                         livefs_root="${mountpoint}"
1802                 else
1803                         panic "Unable to find a live file system on the network"
1804                 fi
1805         else
1806                 if [ -n "${ISCSI_PORTAL}" ]
1807                 then
1808                         do_iscsi && livefs_root="${mountpoint}"
1809                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1810                 then
1811                         # Do a local boot from hd
1812                         livefs_root=${ROOT}
1813                 else
1814                         if [ -x /usr/bin/memdiskfind ]
1815                         then
1816                                 MEMDISK=$(/usr/bin/memdiskfind)
1817
1818                                 if [ $? -eq 0 ]
1819                                 then
1820                                         # We found a memdisk, set up phram
1821                                         modprobe phram phram=memdisk,${MEMDISK}
1822
1823                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
1824                                         modprobe mtdblock
1825                                 fi
1826                         fi
1827
1828                         # Scan local devices for the image
1829                         i=0
1830                         while [ "$i" -lt 60 ]
1831                         do
1832                                 livefs_root=$(find_livefs ${i})
1833
1834                                 if [ -n "${livefs_root}" ]
1835                                 then
1836                                         break
1837                                 fi
1838
1839                                 sleep 1
1840                                 i="$(($i + 1))"
1841                         done
1842                 fi
1843         fi
1844
1845         if [ -z "${livefs_root}" ]
1846         then
1847                 panic "Unable to find a medium containing a live file system"
1848         fi
1849
1850         if [ "${INTEGRITY_CHECK}" ]
1851         then
1852                 integrity_check "${livefs_root}"
1853         fi
1854
1855         if [ "${TORAM}" ]
1856         then
1857                 live_dest="ram"
1858         elif [ "${TODISK}" ]
1859         then
1860                 live_dest="${TODISK}"
1861         fi
1862
1863         if [ "${live_dest}" ]
1864         then
1865                 log_begin_msg "Copying live media to ${live_dest}"
1866                 copy_live_to "${livefs_root}" "${live_dest}"
1867                 log_end_msg
1868         fi
1869
1870         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
1871         # because the mountpoint is left behind in /proc/mounts, so let's get
1872         # rid of it when running from RAM
1873         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
1874         then
1875           losetup -d /dev/loop0
1876           grep -q /isofrom /proc/mounts && umount /isofrom
1877         fi
1878
1879         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
1880         then
1881                 setup_unionfs "${livefs_root}" "${rootmnt}"
1882         else
1883                 mac="$(get_mac)"
1884                 mac="$(echo ${mac} | sed 's/-//g')"
1885                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1886         fi
1887
1888
1889         if [ -n "${ROOT_PID}" ] ; then
1890                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
1891         fi
1892
1893         log_end_msg
1894
1895         # unionfs-fuse needs /dev to be bind-mounted for the duration of
1896         # live-bottom; udev's init script will take care of things after that
1897         if [ "${UNIONTYPE}" = unionfs-fuse ]
1898         then
1899                 mount -n -o bind /dev "${rootmnt}/dev"
1900         fi
1901
1902         # Move to the new root filesystem so that programs there can get at it.
1903         if [ ! -d /root/live/image ]
1904         then
1905                 mkdir -p /root/live/image
1906                 mount --move /live/image /root/live/image
1907         fi
1908
1909         # aufs2 in kernel versions around 2.6.33 has a regression:
1910         # directories can't be accessed when read for the first the time,
1911         # causing a failure for example when accessing /var/lib/fai
1912         # when booting FAI, this simple workaround solves it
1913         ls /root/* >/dev/null 2>&1
1914
1915         # copy snapshot configuration if exists
1916         if [ -f snapshot.conf ]
1917         then
1918                 log_begin_msg "Copying snapshot.conf to ${rootmnt}/etc/live/boot.d"
1919                 if [ ! -d "${rootmnt}/etc/live/boot.d" ]
1920                 then
1921                         mkdir -p "${rootmnt}/etc/live/boot.d"
1922                 fi
1923                 cp snapshot.conf "${rootmnt}/etc/live/boot.d/"
1924                 log_end_msg
1925         fi
1926
1927         maybe_break live-bottom
1928         log_begin_msg "Running /scripts/live-bottom\n"
1929
1930         run_scripts /scripts/live-bottom
1931         log_end_msg
1932
1933         if [ "${UNIONFS}" = unionfs-fuse ]
1934         then
1935                 umount "${rootmnt}/dev"
1936         fi
1937
1938         exec 1>&6 6>&-
1939         exec 2>&7 7>&-
1940         kill ${tailpid}
1941         [ -w "${rootmnt}/var/log/" ] && cp live-boot.log "${rootmnt}/var/log/" 2>/dev/null
1942 }