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="${ARGUMENT#nfscow=}"
 210                                 export NFS_COW
 211                                 ;;
 212
 213                         noaccessibility)
 214                                 NOACCESSIBILITY="Yes"
 215                                 export NOACCESSIBILITY
 216                                 ;;
 217
 218                         nofastboot)
 219                                 NOFASTBOOT="Yes"
 220                                 export NOFASTBOOT
 221                                 ;;
 222
 223                         nofstab)
 224                                 NOFSTAB="Yes"
 225                                 export NOFSTAB
 226                                 ;;
 227
 228                         nonetworking)
 229                                 NONETWORKING="Yes"
 230                                 export NONETWORKING
 231                                 ;;
 232
 233                         swapon)
 234                                 SWAPON="Yes"
 235                                 export SWAPON
 236                                 ;;
 237
 238                         persistent)
 239                                 PERSISTENT="Yes"
 240                                 export PERSISTENT
 241                                 ;;
 242
 243                         persistent=*)
 244                                 PERSISTENT="${ARGUMENT#persistent=}"
 245                                 if [ -z "${PERSISTENT}" ]
 246                                 then
 247                                         PERSISTENT="Yes"
 248                                 fi
 249                                 export PERSISTENT
 250                                 ;;
 251
 252                         persistent-path=*)
 253                                 PERSISTENT_PATH="${ARGUMENT#persistent-path=}"
 254                                 export PERSISTENT_PATH
 255                                 ;;
 256
 257                         persistent-subtext=*)
 258                                 root_persistence="${root_persistence}-${ARGUMENT#persistent-subtext=}"
 259                                 home_persistence="${home_persistence}-${ARGUMENT#persistent-subtext=}"
 260                                 root_snapshot_label="${root_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 261                                 home_snapshot_label="${home_snapshot_label}-${ARGUMENT#persistent-subtext=}"
 262                                 ;;
 263
 264                         nopersistent)
 265                                 NOPERSISTENT="Yes"
 266                                 export NOPERSISTENT
 267                                 ;;
 268
 269                         quickusbmodules)
 270                                 QUICKUSBMODULES="Yes"
 271                                 export QUICKUSBMODULES
 272                                 ;;
 273
 274                         preseed/file=*|file=*)
 275                                 LOCATIONS="${ARGUMENT#*=} ${LOCATIONS}"
 276                                 export LOCATIONS
 277                                 ;;
 278
 279                         nopreseed)
 280                                 NOPRESEED="Yes"
 281                                 export NOPRESEED
 282                                 ;;
 283
 284                         */*=*)
 285                                 question="${ARGUMENT%%=*}"
 286                                 value="${ARGUMENT#*=}"
 287                                 PRESEEDS="${PRESEEDS}\"${question}=${value}\" "
 288                                 export PRESEEDS
 289                                 ;;
 290
 291                         showmounts)
 292                                 SHOWMOUNTS="Yes"
 293                                 export SHOWMOUNTS
 294                                 ;;
 295
 296                         silent)
 297                                 SILENT="Yes"
 298                                 export SILENT
 299                                 ;;
 300
 301                         todisk=*)
 302                                 TODISK="${ARGUMENT#todisk=}"
 303                                 export TODISK
 304                                 ;;
 305
 306                         toram)
 307                                 TORAM="Yes"
 308                                 export TORAM
 309                                 ;;
 310
 311                         toram=*)
 312                                 TORAM="Yes"
 313                                 MODULETORAM="${ARGUMENT#toram=}"
 314                                 export TORAM MODULETORAM
 315                                 ;;
 316
 317                         exposedroot)
 318                                 EXPOSED_ROOT="Yes"
 319                                 export EXPOSED_ROOT
 320                                 ;;
 321
 322                         plainroot)
 323                                 PLAIN_ROOT="Yes"
 324                                 export PLAIN_ROOT
 325                                 ;;
 326
 327                         skipunion)
 328                                 SKIP_UNION_MOUNTS="Yes"
 329                                 export SKIP_UNION_MOUNTS
 330                                 ;;
 331
 332                         root=*)
 333                                 ROOT="${ARGUMENT#root=}"
 334                                 export ROOT
 335                                 ;;
 336
 337                         union=*)
 338                                 UNIONTYPE="${ARGUMENT#union=}"
 339                                 export UNIONTYPE
 340                                 ;;
 341                 esac
 342         done
 343
 344         # sort of compatibility with netboot.h from linux docs
 345         if [ -z "${NETBOOT}" ]
 346         then
 347                 if [ "${ROOT}" = "/dev/nfs" ]
 348                 then
 349                         NETBOOT="nfs"
 350                         export NETBOOT
 351                 elif [ "${ROOT}" = "/dev/cifs" ]
 352                 then
 353                         NETBOOT="cifs"
 354                         export NETBOOT
 355                 fi
 356         fi
 357
 358         if [ -z "${MODULE}" ]
 359         then
 360                 MODULE="filesystem"
 361                 export MODULE
 362         fi
 363
 364         if [ -z "${UNIONTYPE}" ]
 365         then
 366                 UNIONTYPE="aufs"
 367                 export UNIONTYPE
 368         fi
 369 }
 370
 371 is_live_path ()
 372 {
 373         DIRECTORY="${1}"
 374
 375         if [ -d "${DIRECTORY}"/"${LIVE_MEDIA_PATH}" ]
 376         then
 377                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs dir jffs2
 378                 do
 379                         if [ "$(echo ${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM})" != "${DIRECTORY}/${LIVE_MEDIA_PATH}/*.${FILESYSTEM}" ]
 380                         then
 381                                 return 0
 382                         fi
 383                 done
 384         fi
 385
 386         return 1
 387 }
 388
 389 matches_uuid ()
 390 {
 391         if [ "${IGNORE_UUID}" ] || [ ! -e /conf/uuid.conf ]
 392         then
 393                 return 0
 394         fi
 395
 396         path="${1}"
 397         uuid="$(cat /conf/uuid.conf)"
 398
 399         for try_uuid_file in "${path}/.disk/live-uuid"*
 400         do
 401                 [ -e "${try_uuid_file}" ] || continue
 402
 403                 try_uuid="$(cat "${try_uuid_file}")"
 404
 405                 if [ "${uuid}" = "${try_uuid}" ]
 406                 then
 407                         return 0
 408                 fi
 409         done
 410
 411         return 1
 412 }
 413
 414 get_backing_device ()
 415 {
 416         case "${1}" in
 417                 *.squashfs|*.ext2|*.ext3|*.ext4|*.jffs2)
 418                         echo $(setup_loop "${1}" "loop" "/sys/block/loop*" '0' "${LIVE_MEDIA_ENCRYPTION}" "${2}")
 419                         ;;
 420
 421                 *.dir)
 422                         echo "directory"
 423                         ;;
 424
 425                 *)
 426                         panic "Unrecognized live filesystem: ${1}"
 427                         ;;
 428         esac
 429 }
 430
 431 match_files_in_dir ()
 432 {
 433         # Does any files match pattern ${1} ?
 434         local pattern="${1}"
 435
 436         if [ "$(echo ${pattern})" != "${pattern}" ]
 437         then
 438                 return 0
 439         fi
 440
 441         return 1
 442 }
 443
 444 mount_images_in_directory ()
 445 {
 446         directory="${1}"
 447         rootmnt="${2}"
 448         mac="${3}"
 449
 450
 451         if match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.squashfs" ||
 452                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext2" ||
 453                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext3" ||
 454                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.ext4" ||
 455                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.jffs2" ||
 456                 match_files_in_dir "${directory}/${LIVE_MEDIA_PATH}/*.dir"
 457         then
 458                 [ -n "${mac}" ] && adddirectory="${directory}/${LIVE_MEDIA_PATH}/${mac}"
 459                 setup_unionfs "${directory}/${LIVE_MEDIA_PATH}" "${rootmnt}" "${adddirectory}"
 460         else
 461                 panic "No supported filesystem images found at /${LIVE_MEDIA_PATH}."
 462         fi
 463 }
 464
 465 is_nice_device ()
 466 {
 467         sysfs_path="${1#/sys}"
 468
 469         if /lib/udev/path_id "${sysfs_path}" | egrep -q "ID_PATH=(usb|pci-|platform-orion-ehci|platform-mmc|platform-mxsdhci|)"
 470         then
 471                 return 0
 472         elif echo "${sysfs_path}" | grep -q '^/block/vd[a-z]$'
 473         then
 474                 return 0
 475         elif echo ${sysfs_path} | grep -q "^/block/dm-"
 476         then
 477                 return 0
 478         fi
 479
 480         return 1
 481 }
 482
 483 copy_live_to ()
 484 {
 485         copyfrom="${1}"
 486         copytodev="${2}"
 487         copyto="${copyfrom}_swap"
 488
 489         if [ -z "${MODULETORAM}" ]
 490         then
 491                 size=$(fs_size "" ${copyfrom}/${LIVE_MEDIA_PATH} "used")
 492         else
 493                 MODULETORAMFILE="${copyfrom}/${LIVE_MEDIA_PATH}/${MODULETORAM}"
 494
 495                 if [ -f "${MODULETORAMFILE}" ]
 496                 then
 497                         size=$( expr $(ls -la ${MODULETORAMFILE} | awk '{print $5}') / 1024 + 5000 )
 498                 else
 499                         log_warning_msg "Error: toram-module ${MODULETORAM} (${MODULETORAMFILE}) could not be read."
 500                         return 1
 501                 fi
 502         fi
 503
 504         if [ "${copytodev}" = "ram" ]
 505         then
 506                 # copying to ram:
 507                 freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
 508                 mount_options="-o size=${size}k"
 509                 free_string="memory"
 510                 fstype="tmpfs"
 511                 dev="/dev/shm"
 512         else
 513                 # it should be a writable block device
 514                 if [ -b "${copytodev}" ]
 515                 then
 516                         dev="${copytodev}"
 517                         free_string="space"
 518                         fstype=$(get_fstype "${dev}")
 519                         freespace=$(fs_size "${dev}")
 520                 else
 521                         log_warning_msg "${copytodev} is not a block device."
 522                         return 1
 523                 fi
 524         fi
 525
 526         if [ "${freespace}" -lt "${size}" ]
 527         then
 528                 log_warning_msg "Not enough free ${free_string} (${freespace}k free, ${size}k needed) to copy live media in ${copytodev}."
 529                 return 1
 530         fi
 531
 532         # begin copying (or uncompressing)
 533         mkdir "${copyto}"
 534         log_begin_msg "mount -t ${fstype} ${mount_options} ${dev} ${copyto}"
 535         mount -t "${fstype}" ${mount_options} "${dev}" "${copyto}"
 536
 537         if [ "${extension}" = "tgz" ]
 538         then
 539                 cd "${copyto}"
 540                 tar zxf "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 541                 rm -f "${copyfrom}/${LIVE_MEDIA_PATH}/$(basename ${FETCH})"
 542                 mount -r -o move "${copyto}" "${rootmnt}"
 543                 cd "${OLDPWD}"
 544         else
 545                 if [ -n "${MODULETORAMFILE}" ]
 546                 then
 547                         if [ -x /bin/rsync ]
 548                         then
 549                                 echo " * Copying $MODULETORAMFILE to RAM" 1>/dev/console
 550                                 rsync -a --progress ${MODULETORAMFILE} ${copyto} 1>/dev/console # copy only the filesystem module
 551                         else
 552                                 cp ${MODULETORAMFILE} ${copyto} # copy only the filesystem module
 553                         fi
 554                 else
 555                         if [ -x /bin/rsync ]
 556                         then
 557                                 echo " * Copying whole medium to RAM" 1>/dev/console
 558                                 rsync -a --progress ${copyfrom}/* ${copyto} 1>/dev/console  # "cp -a" from busybox also copies hidden files
 559                         else
 560                                 mkdir -p ${copyto}/${LIVE_MEDIA_PATH}
 561                                 cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/* ${copyto}/${LIVE_MEDIA_PATH}
 562                                 if [ -e ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ]
 563                                 then
 564                                         cp -a ${copyfrom}/${LIVE_MEDIA_PATH}/.disk ${copyto}
 565                                 fi
 566                         fi
 567                 fi
 568
 569                 umount ${copyfrom}
 570                 mount -r -o move ${copyto} ${copyfrom}
 571         fi
 572
 573         rmdir ${copyto}
 574         return 0
 575 }
 576
 577 do_netsetup ()
 578 {
 579         modprobe -q af_packet # For DHCP
 580
 581         udevadm trigger
 582         udevadm settle
 583
 584         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && \
 585            [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
 586         then
 587
 588
 589         # support for Syslinux IPAPPEND parameter
 590         # it sets the BOOTIF variable on the kernel parameter
 591
 592         if [ -n "${BOOTIF}" ]
 593         then
 594                 # pxelinux sets BOOTIF to a value based on the mac address of the
 595                 # network card used to PXE boot, so use this value for DEVICE rather
 596                 # than a hard-coded device name from initramfs.conf. this facilitates
 597                 # network booting when machines may have multiple network cards.
 598                 # pxelinux sets BOOTIF to 01-$mac_address
 599
 600                 # strip off the leading "01-", which isn't part of the mac
 601                 # address
 602                 temp_mac=${BOOTIF#*-}
 603
 604                 # convert to typical mac address format by replacing "-" with ":"
 605                 bootif_mac=""
 606                 IFS='-'
 607                 for x in $temp_mac
 608                 do
 609                         if [ -z "$bootif_mac" ]
 610                         then
 611                                 bootif_mac="$x"
 612                         else
 613                                 bootif_mac="$bootif_mac:$x"
 614                         fi
 615                 done
 616                 unset IFS
 617
 618                 # look for devices with matching mac address, and set DEVICE to
 619                 # appropriate value if match is found.
 620
 621                 for device in /sys/class/net/*
 622                 do
 623                         if [ -f "$device/address" ]
 624                         then
 625                                 current_mac=$(cat "$device/address")
 626
 627                                 if [ "$bootif_mac" = "$current_mac" ]
 628                                 then
 629                                         DEVICE=${device##*/}
 630                                         break
 631                                 fi
 632                         fi
 633                 done
 634         fi
 635
 636         # if ethdevice was not specified on the kernel command line
 637         # make sure we try to get a working network configuration
 638         # for *every* present network device (except for loopback of course)
 639         if [ -z "$ETHDEVICE" ] ; then
 640                 echo "If you want to boot from a specific device use bootoption ethdevice=..."
 641                 for device in /sys/class/net/*; do
 642                         dev=${device##*/} ;
 643                         if [ "$dev" != "lo" ] ; then
 644                                 ETHDEVICE="$ETHDEVICE $dev"
 645                         fi
 646                 done
 647         fi
 648
 649         # split args of ethdevice=eth0,eth1 into "eth0 eth1"
 650         for device in $(echo $ETHDEVICE | sed 's/,/ /g') ; do
 651                 devlist="$devlist $device"
 652         done
 653
 654         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
 655         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
 656
 657         # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
 658         # an endless loop; iff execution fails give it two further tries, that's
 659         # why we use '$devlist $devlist $devlist' for the other for loop
 660         for dev in $devlist $devlist $devlist ; do
 661                 echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
 662                 ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
 663                 jobid=$!
 664                 sleep "$ETHDEV_TIMEOUT" ; sleep 1
 665                 if [ -r /proc/"$jobid"/status ] ; then
 666                         echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
 667                         kill -9 $jobid
 668                 fi
 669
 670                 # if configuration of device worked we should have an assigned
 671                 # IP address, iff so let's use the according as $DEVICE for later usage
 672                 # simple and primitive approach which seems to work fine
 673                 if ifconfig $dev | grep -q 'inet.*addr:' ; then
 674                         export DEVICE="$dev"
 675                         break
 676                 fi
 677         done
 678
 679         else
 680         ipconfig ${DEVICE} | tee /netboot.config
 681         fi
 682
 683         # source relevant ipconfig output
 684         OLDHOSTNAME=${HOSTNAME}
 685         . /tmp/net-${DEVICE}.conf
 686         [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 687         export HOSTNAME
 688
 689         if [ -n "${DEVICE}" ]
 690         then
 691                 HWADDR="$(cat /sys/class/net/${DEVICE}/address)"
 692         fi
 693
 694         if [ ! -e "/etc/resolv.conf" ]
 695         then
 696                 echo "Creating /etc/resolv.conf"
 697
 698                 if [ -n "${DNSDOMAIN}" ]
 699                 then
 700                         echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
 701                         echo "search ${DNSDOMAIN}" > /etc/resolv.conf
 702                 fi
 703
 704                 for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
 705                 do
 706                         echo "nameserver $i" >> /etc/resolv.conf
 707                 done
 708         fi
 709
 710         # Check if we have a network device at all
 711         if ! ls /sys/class/net/"$DEVICE" > /dev/null 2>&1 && \
 712            ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 713            ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 714            ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 715            ! ls /sys/class/net/ra0 > /dev/null 2>&1
 716         then
 717                 panic "No supported network device found, maybe a non-mainline driver is required."
 718         fi
 719 }
 720
 721 do_netmount()
 722 {
 723         do_netsetup
 724
 725         if [ "${NFSROOT}" = "auto" ]
 726         then
 727                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 728         fi
 729
 730         rc=1
 731
 732         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] )
 733         then
 734                 do_httpmount
 735                 return $?
 736         fi
 737
 738         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 739         then
 740                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 741         fi
 742
 743         log_begin_msg "Trying netboot from ${NFSROOT}"
 744
 745         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 746         then
 747                 rc=0
 748         elif do_nfsmount
 749         then
 750                 NETBOOT="nfs"
 751                 export NETBOOT
 752                 rc=0
 753         fi
 754
 755         log_end_msg
 756         return ${rc}
 757 }
 758
 759 do_iscsi()
 760 {
 761         do_netsetup
 762         #modprobe ib_iser
 763         modprobe iscsi_tcp
 764         local debugopt=""
 765         [ "${DEBUG}" == "Yes" ] && debugopt="-d 8"
 766         #FIXME this name is supposed to be unique - some date + ifconfig hash?
 767         ISCSI_INITIATORNAME="iqn.1993-08.org.debian.live:01:$(echo "${HWADDR}" | sed -e s/://g)"
 768         export ISCSI_INITIATORNAME
 769         if [ -n "${ISCSI_SERVER}" ] ; then
 770                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_SERVER}" -p "${ISCSI_PORT}"
 771         else
 772                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_PORTAL}" -p 3260
 773         fi
 774         if [ $? != 0 ]
 775         then
 776                 panic "Failed to log into iscsi target"
 777         fi
 778         local host="$(ls -d /sys/class/scsi_host/host*/device/iscsi_host:host* \
 779                             /sys/class/scsi_host/host*/device/iscsi_host/host* | sed -e 's:/device.*::' -e 's:.*host::')"
 780         if [ -n "${host}" ]
 781         then
 782                 local devices=""
 783                 local i=0
 784                 while [ -z "${devices}" -a $i -lt 60 ]
 785                 do
 786                         sleep 1
 787                         devices="$(ls -d /sys/class/scsi_device/${host}*/device/block:* \
 788                                          /sys/class/scsi_device/${host}*/device/block/* | sed -e 's!.*[:/]!!')"
 789                         i=$(expr $i + 1)
 790                         echo -ne $i\\r
 791                 done
 792                 for dev in $devices
 793                 do
 794                         if check_dev "null" "/dev/$dev"
 795                         then
 796                                 NETBOOT="iscsi"
 797                                 export NETBOOT
 798                                 return 0;
 799                         fi
 800                 done
 801                 panic "Failed to locate a live device on iSCSI devices (tried: $devices)."
 802         else
 803                 panic "Failed to locate iSCSI host in /sys"
 804         fi
 805 }
 806
 807 do_httpmount ()
 808 {
 809         rc=1
 810
 811         for webfile in HTTPFS FTPFS FETCH
 812         do
 813                 local url="$(eval echo \"\$\{${webfile}\}\")"
 814                 local extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
 815
 816                 if [ -n "$url" ]
 817                 then
 818                         case "${extension}" in
 819                                 iso|squashfs|tgz|tar)
 820                                         if [ "${extension}" = "iso" ]
 821                                         then
 822                                                 mkdir -p "${alt_mountpoint}"
 823                                                 dest="${alt_mountpoint}"
 824                                         else
 825                                                 local dest="${mountpoint}/${LIVE_MEDIA_PATH}"
 826                                                 mount -t ramfs ram "${mountpoint}"
 827                                                 mkdir -p "${dest}"
 828                                         fi
 829                                         if [ "${webfile}" = "FETCH" ]
 830                                         then
 831                                                 case "$url" in
 832                                                         tftp*)
 833                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
 834                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
 835                                                                 lfile="$(basename $url)"
 836                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
 837                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
 838                                                         ;;
 839
 840                                                         *)
 841                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
 842                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
 843                                                                 ;;
 844                                                 esac
 845                                         else
 846                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
 847                                                 if [ "${webfile}" = "FTPFS" ]
 848                                                 then
 849                                                         FUSE_MOUNT="curlftpfs"
 850                                                         url="$(dirname ${url})"
 851                                                 else
 852                                                         FUSE_MOUNT="httpfs"
 853                                                 fi
 854                                                 modprobe fuse
 855                                                 $FUSE_MOUNT "${url}" "${dest}"
 856                                                 ROOT_PID="$(minips h -C "$FUSE_MOUNT" | { read x y ; echo "$x" ; } )"
 857                                         fi
 858                                         [ ${?} -eq 0 ] && rc=0
 859                                         [ "${extension}" = "tgz" ] && live_dest="ram"
 860                                         if [ "${extension}" = "iso" ]
 861                                         then
 862                                                 isoloop=$(setup_loop "${dest}/$(basename "${url}")" "loop" "/sys/block/loop*" "" '')
 863                                                 mount -t iso9660 "${isoloop}" "${mountpoint}"
 864                                                 rc=${?}
 865                                         fi
 866                                         break
 867                                         ;;
 868
 869                                 *)
 870                                         log_begin_msg "Unrecognized archive extension for ${url}"
 871                                         ;;
 872                         esac
 873                 fi
 874         done
 875
 876         if [ ${rc} != 0 ]
 877         then
 878                 if [ -d "${alt_mountpoint}" ]
 879                 then
 880                         umount "${alt_mountpoint}"
 881                         rmdir "${alt_mountpoint}"
 882                 fi
 883                 umount "${mountpoint}"
 884         elif [ "${webfile}"  != "FETCH" ] ; then
 885                 NETBOOT="${webfile}"
 886                 export NETBOOT
 887         fi
 888
 889         return ${rc}
 890 }
 891
 892 do_nfsmount ()
 893 {
 894         rc=1
 895
 896         modprobe -q nfs
 897
 898         if [ -z "${NFSOPTS}" ]
 899         then
 900                 NFSOPTS=""
 901         fi
 902
 903         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 904
 905         # FIXME: This while loop is an ugly HACK round an nfs bug
 906         i=0
 907         while [ "$i" -lt 60 ]
 908         do
 909                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 910                 sleep 1
 911                 i="$(($i + 1))"
 912         done
 913
 914         return ${rc}
 915 }
 916
 917 do_cifsmount ()
 918 {
 919         rc=1
 920
 921         if [ -x "/sbin/mount.cifs" ]
 922         then
 923                 if [ -z "${NFSOPTS}" ]
 924                 then
 925                         CIFSOPTS="-ouser=root,password="
 926                 else
 927                         CIFSOPTS="${NFSOPTS}"
 928                 fi
 929
 930                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 931                 modprobe -q cifs
 932
 933                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 934                 then
 935                         rc=0
 936                 fi
 937         fi
 938
 939         return ${rc}
 940 }
 941
 942 do_snap_copy ()
 943 {
 944         fromdev="${1}"
 945         todir="${2}"
 946         snap_type="${3}"
 947         size=$(fs_size "${fromdev}" "" "used")
 948
 949         if [ -b "${fromdev}" ]
 950         then
 951                 # look for free mem
 952                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 953                 then
 954                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
 955                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
 956                 else
 957                         freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
 958                 fi
 959
 960                 tomount="/mnt/tmpsnap"
 961
 962                 if [ ! -d "${tomount}" ]
 963                 then
 964                         mkdir -p "${tomount}"
 965                 fi
 966
 967                 fstype=$(get_fstype "${fromdev}")
 968
 969                 if [ -n "${fstype}" ]
 970                 then
 971                         # Copying stuff...
 972                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
 973                         cp -a "${tomount}"/* ${todir}
 974                         umount "${tomount}"
 975                 else
 976                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 977                 fi
 978
 979                 rmdir "${tomount}"
 980
 981                 if echo ${fromdev} | grep -qs loop
 982                 then
 983                         losetup -d "${fromdev}"
 984                 fi
 985
 986                 return 0
 987         else
 988                 return 1
 989
 990                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
 991         fi
 992 }
 993
 994 find_snap ()
 995 {
 996         # Look for ${snap_label}.* in block devices
 997         snap_label="${1}"
 998
 999         if [ "${PERSISTENT}" != "nofiles" ]
1000         then
1001                 # search for image files
1002                 snapdata=$(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")
1003         fi
1004
1005         if [ -z "${snapdata}" ]
1006         then
1007                 snapdata=$(find_cow_device "${snap_label}")
1008         fi
1009         echo "${snapdata}"
1010 }
1011
1012 try_snap ()
1013 {
1014         # copy the contents of previously found snapshot to ${snap_mount}
1015         # and remember the device and filename for resync on exit in live-boot.init
1016
1017         snapdata="${1}"
1018         snap_mount="${2}"
1019         snap_type="${3}"
1020
1021         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
1022         then
1023                 log_success_msg "found snapshot: ${snapdata}"
1024                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
1025                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
1026                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
1027
1028                 if ! try_mount "${snapdev}" "${snapback}" "ro"
1029                 then
1030                         break
1031                 fi
1032
1033                 RES="0"
1034
1035                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
1036                 then
1037                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
1038                         dev=$(get_backing_device "${snapback}/${snapfile}")
1039
1040                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1041                         RES="$?"
1042                 else
1043                         # cpio.gz snapshot
1044
1045                         # Unfortunately klibc's cpio is incompatible with the
1046                         # rest of the world; everything else requires -u -d,
1047                         # while klibc doesn't implement them. Try to detect
1048                         # whether it's in use.
1049                         cpiopath="$(which cpio)" || true
1050                         if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath"
1051                         then
1052                                 cpioargs=
1053                         else
1054                                 cpioargs='--unconditional --make-directories'
1055                         fi
1056
1057                         cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse 2>/dev/null
1058                         RES="$?"
1059
1060                         if [ "${RES}" != "0" ]
1061                         then
1062                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse\""
1063                         fi
1064                 fi
1065
1066                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
1067
1068                 if [ "${RES}" != "0" ]
1069                 then
1070                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
1071                 fi
1072
1073         elif [ -b "${snapdata}" ]
1074         then
1075                 # Try to find if it could be a snapshot partition
1076                 dev="${snapdata}"
1077                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
1078                 if echo "${dev}" | grep -qs loop
1079                 then
1080                         # strange things happens, user confused?
1081                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
1082                         snapfile=$(basename ${snaploop})
1083                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
1084                 else
1085                         snapdev="${dev}"
1086                 fi
1087
1088                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1089                 then
1090                         log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1091                         return 1
1092                 else
1093                         if [ -n "${snapfile}" ]
1094                         then
1095                                 # it was a loop device, user confused
1096                                 umount ${snapdev}
1097                         fi
1098                 fi
1099         else
1100                 log_warning_msg "Impossible to include the ${snap_type} Snapshot"
1101                 return 1
1102         fi
1103
1104         echo "export ${snap_type}SNAP="/cow${snap_mount#$rootmnt}":${snapdev}:${snapfile}" >> /etc/live.conf # for resync on reboot/halt
1105         return 0
1106 }
1107
1108 setup_unionfs ()
1109 {
1110         image_directory="${1}"
1111         rootmnt="${2}"
1112         addimage_directory="${3}"
1113
1114         case ${UNIONTYPE} in
1115                 aufs|unionfs)
1116                         modprobe -q -b ${UNIONTYPE}
1117
1118                         if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
1119                         then
1120                                 echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
1121                                 echo "This might be really slow."
1122
1123                                 UNIONTYPE="unionfs-fuse"
1124                         fi
1125                         ;;
1126         esac
1127
1128         if [ "${UNIONTYPE}" = unionfs-fuse ]
1129         then
1130                 modprobe fuse
1131         fi
1132
1133         # run-init can't deal with images in a subdir, but we're going to
1134         # move all of these away before it runs anyway.  No, we're not,
1135         # put them in / since move-mounting them into / breaks mono and
1136         # some other apps.
1137
1138         croot="/"
1139
1140         # Let's just mount the read-only file systems first
1141         rofsstring=""
1142         rofslist=""
1143
1144         if [ "${UNIONTYPE}" = "aufs" ]
1145         then
1146                 roopt="rr"
1147                 noxino_opt="noxino,"
1148         elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
1149         then
1150                 roopt="RO"
1151         else
1152                 roopt="ro"
1153         fi
1154
1155         if [ -z "${PLAIN_ROOT}" ]
1156         then
1157                 # Read image names from ${MODULE}.module if it exists
1158                 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1159                 then
1160                         for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1161                         do
1162                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1163                         done
1164                 elif [ -e "${image_directory}/${MODULE}.module" ]
1165                 then
1166                         for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1167                         do
1168                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1169                         done
1170                 else
1171                         # ${MODULE}.module does not exist, create a list of images
1172                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1173                         do
1174                                 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1175                                 do
1176                                         if [ -e "${IMAGE}" ]
1177                                         then
1178                                                 image_string="${image_string} ${IMAGE}"
1179                                         fi
1180                                 done
1181                         done
1182
1183                         if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1184                         then
1185                                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1186                                 do
1187                                         for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1188                                         do
1189                                                 if [ -e "${IMAGE}" ]
1190                                                 then
1191                                                         image_string="${image_string} ${IMAGE}"
1192                                                 fi
1193                                         done
1194                                 done
1195                         fi
1196
1197                         # Now sort the list
1198                         image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1199                 fi
1200
1201         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1202
1203                 mkdir -p "${croot}"
1204
1205                 for image in ${image_string}
1206                 do
1207                         imagename=$(basename "${image}")
1208
1209                         export image devname
1210                         maybe_break live-realpremount
1211                         log_begin_msg "Running /scripts/live-realpremount"
1212                         run_scripts /scripts/live-realpremount
1213                         log_end_msg
1214
1215                         if [ -d "${image}" ]
1216                         then
1217                                 # it is a plain directory: do nothing
1218                                 rofsstring="${image}=${roopt}:${rofsstring}"
1219                                 rofslist="${image} ${rofslist}"
1220                         elif [ -f "${image}" ]
1221                         then
1222                                 if losetup --help 2>&1 | grep -q -- "-r\b"
1223                                 then
1224                                         backdev=$(get_backing_device "${image}" "-r")
1225                                 else
1226                                         backdev=$(get_backing_device "${image}")
1227                                 fi
1228                                 fstype=$(get_fstype "${backdev}")
1229
1230                                 if [ "${fstype}" = "unknown" ]
1231                                 then
1232                                         panic "Unknown file system type on ${backdev} (${image})"
1233                                 fi
1234
1235                                 if [ -z "${fstype}" ]
1236                                 then
1237                                         fstype="${imagename##*.}"
1238                                         log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1239                                 fi
1240
1241                                 mkdir -p "${croot}/${imagename}"
1242                                 log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
1243                                 mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
1244                                 log_end_msg
1245                         fi
1246                 done
1247         else
1248                 # we have a plain root system
1249                 mkdir -p "${croot}/filesystem"
1250                 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
1251                 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}"
1252                 # probably broken:
1253                 mount -o bind ${croot}/filesystem $mountpoint
1254                 log_end_msg
1255         fi
1256
1257         rofsstring=${rofsstring%:}
1258
1259         mkdir -p /cow
1260
1261         # Looking for "${root_persistence}" device or file
1262         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1263         then
1264                 if [ -z "${QUICKUSBMODULES}" ]
1265                 then
1266                         # Load USB modules
1267                         num_block=$(ls -l /sys/block | wc -l)
1268                         for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1269                         do
1270                                 modprobe -q -b ${module}
1271                         done
1272
1273                         udevadm trigger
1274                         udevadm settle
1275
1276                         # For some reason, udevsettle does not block in this scenario,
1277                         # so we sleep for a little while.
1278                         #
1279                         # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1280                         for timeout in 5 4 3 2 1
1281                         do
1282                                 sleep 1
1283
1284                                 if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1285                                 then
1286                                         break
1287                                 fi
1288                         done
1289                 fi
1290
1291                 # search for label and files (this could be hugely optimized)
1292                 cowprobe=$(find_cow_device "${root_persistence}")
1293                 if [ -b "${cowprobe}" ]
1294                 then
1295                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1296                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1297                         # snapshots to be sure to really store some e.g key config files,
1298                         # but not on the same media
1299                         blacklistdev="${cowprobe}"
1300                         PERSISTENCE_IS_ON="1"
1301                         export PERSISTENCE_IS_ON
1302                 fi
1303                 # homecow just mount something on /home, this should be generalized some way
1304                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1305                 if [ -b "${homecow}" ]
1306                 then
1307                         PERSISTENCE_IS_ON="1"
1308                         export PERSISTENCE_IS_ON
1309                 fi
1310                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1311                 # This second type should be removed when snapshot will get smarter,
1312                 # hence when "/etc/live-snapshot*list" will be supported also by
1313                 # ext2|ext3|ext4|jffs2 snapshot types.
1314                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1315
1316                 if [ -b "${cowprobe}" ]
1317                 then
1318                         cowdevice=${cowprobe}
1319                         cow_fstype=$(get_fstype "${cowprobe}")
1320                         cow_mountopt="rw,noatime"
1321
1322                         if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
1323                         then
1324                                 fsck -y ${cowdevice}
1325                         fi
1326                 else
1327                         log_warning_msg "Unable to find the persistent medium"
1328                         cowdevice="tmpfs"
1329                         cow_fstype="tmpfs"
1330                         cow_mountopt="rw,noatime,mode=755"
1331                 fi
1332         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1333         then
1334                 # check if there are any nfs options
1335                 if echo ${NFS_COW}|grep -q ','
1336                 then
1337                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1338                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1339                 else
1340                         nfs_cow_opts="-o nolock"
1341                         nfs_cow=${NFS_COW}
1342                 fi
1343                 mac="$(get_mac)"
1344                 if [ -n "${mac}" ]
1345                 then
1346                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1347                         cow_fstype="nfs"
1348                 else
1349                         panic "unable to determine mac address"
1350                 fi
1351         else
1352                 cowdevice="tmpfs"
1353                 cow_fstype="tmpfs"
1354                 cow_mountopt="rw,noatime,mode=755"
1355         fi
1356
1357         if [ "${cow_fstype}" = "nfs" ]
1358         then
1359                 log_begin_msg \
1360                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1361                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1362                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1363         else
1364                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1365                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1366         fi
1367
1368         rofscount=$(echo ${rofslist} |wc -w)
1369
1370         if [ -n "${EXPOSED_ROOT}" ]
1371         then
1372                 if [ ${rofscount} -ne 1 ]
1373                 then
1374                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1375                 fi
1376                 exposedrootfs=${rofslist%% }
1377
1378                 mount --bind ${exposedrootfs} ${rootmnt} || \
1379                         panic "bind mount of ${exposedrootfs} failed"
1380
1381                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1382                 then
1383                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1384                 else
1385                         cow_dirs=''
1386                 fi
1387
1388                 for dir in ${cow_dirs}; do
1389                         mkdir -p /cow${dir}
1390
1391                         case "${UNIONTYPE}" in
1392                                 unionfs-fuse)
1393                                         (ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:${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}")
1394                                         mkdir -p /dev/.initramfs/varrun
1395                                         pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1396                                         ;;
1397
1398                                 *)
1399                                         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}${dir}=ro"
1400                                         ;;
1401                         esac
1402                 done
1403         else
1404                 case "${UNIONTYPE}" in
1405                         unionfs-fuse)
1406                                 (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}")
1407                                 mkdir -p /dev/.initramfs/varrun
1408                                 pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1409                                 ;;
1410
1411                         *)
1412                                 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:${rofsstring}"
1413                                 ;;
1414                 esac
1415         fi
1416
1417         # Correct the permissions of /:
1418         chmod 0755 "${rootmnt}"
1419
1420         # tmpfs file systems
1421         touch /etc/fstab
1422         mkdir -p "${rootmnt}/live"
1423         mount -t tmpfs tmpfs ${rootmnt}/live
1424
1425         # Adding other custom mounts
1426         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1427         then
1428                 # directly mount /home
1429                 # FIXME: add a custom mounts configurable system
1430
1431                 if [ -b "${homecow}" ]
1432                 then
1433                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1434                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1435                 else
1436                         log_warning_msg "Unable to find the persistent home medium"
1437                 fi
1438
1439                 # Look for other snapshots to copy in
1440                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1441                 # This second type should be removed when snapshot grow smarter
1442                 try_snap "${home_snapdata}" "${rootmnt}/home" "HOME"
1443         fi
1444
1445         if [ -n "${SHOWMOUNTS}" ]
1446         then
1447                 for d in ${rofslist}
1448                 do
1449                         mkdir -p "${rootmnt}/live/${d##*/}"
1450
1451                         case d in
1452                                 *.dir)
1453                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1454                                         ;;
1455
1456                                 *)
1457                                         case "${UNIONTYPE}" in
1458                                                 unionfs-fuse)
1459                                                         mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1460                                                         ;;
1461
1462                                                 *)
1463                                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1464                                                         ;;
1465                                         esac
1466                                         ;;
1467                         esac
1468                 done
1469         fi
1470
1471         # shows cow fs on /cow for use by live-snapshot
1472         mkdir -p "${rootmnt}/live/cow"
1473         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 ${rootmnt}/live/cow"
1474 }
1475
1476 check_dev ()
1477 {
1478         sysdev="${1}"
1479         devname="${2}"
1480         skip_uuid_check="${3}"
1481
1482         # support for fromiso=.../isofrom=....
1483         if [ -n "$FROMISO" ]
1484         then
1485                 ISO_DEVICE=$(dirname $FROMISO)
1486                 if ! [ -b $ISO_DEVICE ]
1487                 then
1488                         # to support unusual device names like /dev/cciss/c0d0p1
1489                         # as well we have to identify the block device name, let's
1490                         # do that for up to 15 levels
1491                         i=15
1492                         while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
1493                         do
1494                                 ISO_DEVICE=$(dirname ${ISO_DEVICE})
1495                                 [ -b "$ISO_DEVICE" ] && break
1496                                 i=$(($i -1))
1497                         done
1498                 fi
1499
1500                 if [ "$ISO_DEVICE" = "/" ]
1501                 then
1502                         echo "Warning: device for bootoption isofrom= ($FROMISO) not found.">>/live.log
1503                 else
1504                         mkdir /isofrom
1505                         mount "$ISO_DEVICE" /isofrom
1506                         ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
1507                         loopdevname=$(setup_loop "/isofrom/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
1508                         devname="${loopdevname}"
1509                 fi
1510         fi
1511
1512         if [ -z "${devname}" ]
1513         then
1514                 devname=$(sys2dev "${sysdev}")
1515         fi
1516
1517         if [ -d "${devname}" ]
1518         then
1519                 mount -o bind "${devname}" $mountpoint || continue
1520
1521                 if is_live_path $mountpoint
1522                 then
1523                         echo $mountpoint
1524                         return 0
1525                 else
1526                         umount $mountpoint
1527                 fi
1528         fi
1529         [ -e "$devname" ] || continue
1530
1531         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1532         then
1533                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1534                 devname="${loopdevname}"
1535         fi
1536
1537         fstype=$(get_fstype "${devname}")
1538
1539         if is_supported_fs ${fstype}
1540         then
1541                 devuid=$(blkid -o value -s UUID "$devname")
1542                 [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
1543                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1544                 [ -n "$devuid" ] && echo "$devuid" >> $tried
1545
1546                 if is_live_path ${mountpoint} && \
1547                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1548                 then
1549                         echo ${mountpoint}
1550                         return 0
1551                 else
1552                         umount ${mountpoint}
1553                 fi
1554         fi
1555
1556         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1557         then
1558                 losetup -d "${loopdevname}"
1559         fi
1560
1561         return 1
1562 }
1563
1564 find_livefs ()
1565 {
1566         timeout="${1}"
1567
1568         # don't start autodetection before timeout has expired
1569         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1570         then
1571                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1572                 then
1573                         return 1
1574                 fi
1575         fi
1576
1577         # first look at the one specified in the command line
1578         case "${LIVE_MEDIA}" in
1579                 removable-usb)
1580                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1581                         do
1582                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1583                                 then
1584                                         if readlink ${sysblock} | grep -q usb ||
1585                                            readlink ${sysblock}/device | grep -q usb # linux < 2.6.29
1586                                         then
1587                                                 for dev in $(subdevices "${sysblock}")
1588                                                 do
1589                                                         if check_dev "${dev}"
1590                                                         then
1591                                                                 return 0
1592                                                         fi
1593                                                 done
1594                                         fi
1595                                 fi
1596                         done
1597                         return 1
1598                         ;;
1599
1600                 removable)
1601                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1602                         do
1603                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1604                                 then
1605                                         for dev in $(subdevices "${sysblock}")
1606                                         do
1607                                                 if check_dev "${dev}"
1608                                                 then
1609                                                         return 0
1610                                                 fi
1611                                         done
1612                                 fi
1613                         done
1614                         return 1
1615                         ;;
1616
1617                 *)
1618                         if [ ! -z "${LIVE_MEDIA}" ]
1619                         then
1620                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1621                                 then
1622                                         return 0
1623                                 fi
1624                         fi
1625                         ;;
1626         esac
1627
1628         # or do the scan of block devices
1629         # prefer removable devices over non-removable devices, so scan them first
1630         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | egrep -v "/(loop|ram|dm-|fd)")
1631         do
1632                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1633                 then
1634                         removable_devices_to_scan="$removable_devices_to_scan $sysblock"
1635                 else
1636                         nonremovable_devices_to_scan="$nonremovable_devices_to_scan $sysblock"
1637                 fi
1638         done
1639         devices_to_scan="$removable_devices_to_scan $nonremovable_devices_to_scan"
1640
1641         for sysblock in $devices_to_scan
1642         do
1643                 devname=$(sys2dev "${sysblock}")
1644                 [ -e "$devname" ] || continue
1645                 fstype=$(get_fstype "${devname}")
1646
1647                 if /lib/udev/cdrom_id ${devname} > /dev/null
1648                 then
1649                         if check_dev "null" "${devname}"
1650                         then
1651                                 return 0
1652                         fi
1653                 elif is_nice_device "${sysblock}"
1654                 then
1655                         for dev in $(subdevices "${sysblock}")
1656                         do
1657                                 if check_dev "${dev}"
1658                                 then
1659                                         return 0
1660                                 fi
1661                         done
1662                 elif [ "${fstype}" = "squashfs" -o \
1663                         "${fstype}" = "btrfs" -o \
1664                         "${fstype}" = "ext2" -o \
1665                         "${fstype}" = "ext3" -o \
1666                         "${fstype}" = "ext4" -o \
1667                         "${fstype}" = "jffs2" ]
1668                 then
1669                         # This is an ugly hack situation, the block device has
1670                         # an image directly on it.  It's hopefully
1671                         # live-boot, so take it and run with it.
1672                         ln -s "${devname}" "${devname}.${fstype}"
1673                         echo "${devname}.${fstype}"
1674                         return 0
1675                 fi
1676         done
1677
1678         return 1
1679 }
1680
1681 set_usplash_timeout ()
1682 {
1683         if [ -x /sbin/usplash_write ]
1684         then
1685                 /sbin/usplash_write "TIMEOUT 120"
1686         else if [ -x /sbin/splashy_update ] ; then
1687                 /sbin/splashy_update "TIMEOUT 120"
1688         fi ; fi
1689 }
1690
1691 integrity_check ()
1692 {
1693         media_mountpoint="${1}"
1694
1695         log_begin_msg "Checking media integrity"
1696
1697         cd ${media_mountpoint}
1698         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1699         RC="${?}"
1700
1701         log_end_msg
1702
1703         if [ "${RC}" -eq 0 ]
1704         then
1705                 log_success_msg "Everything ok, will reboot in 10 seconds."
1706                 sleep 10
1707                 cd /
1708                 umount ${media_mountpoint}
1709                 sync
1710                 echo u > /proc/sysrq-trigger
1711                 echo b > /proc/sysrq-trigger
1712         else
1713                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1714         fi
1715 }
1716
1717 start_usplash_pulse ()
1718 {
1719         if [ -x /sbin/usplash_write ]
1720         then
1721                 /sbin/usplash_write "PULSELOGO"
1722         fi
1723 }
1724
1725 mountroot ()
1726 {
1727         if [ -x /scripts/local-top/cryptroot ]; then
1728             /scripts/local-top/cryptroot
1729         fi
1730
1731         exec 6>&1
1732         exec 7>&2
1733         exec > live.log
1734         exec 2>&1
1735         tail -f live.log >&7 &
1736         tailpid="${!}"
1737
1738         # Ensure 'panic' function is overridden
1739         . /scripts/live-functions
1740
1741         Arguments
1742
1743         set_usplash_timeout
1744         start_usplash_pulse
1745
1746         maybe_break live-premount
1747         log_begin_msg "Running /scripts/live-premount"
1748         run_scripts /scripts/live-premount
1749         log_end_msg
1750
1751         # Needed here too because some things (*cough* udev *cough*)
1752         # changes the timeout
1753
1754         set_usplash_timeout
1755
1756         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1757         then
1758                 if do_netmount
1759                 then
1760                         livefs_root="${mountpoint}"
1761                 else
1762                         panic "Unable to find a live file system on the network"
1763                 fi
1764         else
1765                 if [ -n "${ISCSI_PORTAL}" ]
1766                 then
1767                         do_iscsi && livefs_root="${mountpoint}"
1768                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1769                 then
1770                         # Do a local boot from hd
1771                         livefs_root=${ROOT}
1772                 else
1773                         if [ -x /usr/bin/memdiskfind ]
1774                         then
1775                                 MEMDISK=$(/usr/bin/memdiskfind)
1776
1777                                 if [ $? -eq 0 ]
1778                                 then
1779                                         # We found a memdisk, set up phram
1780                                         modprobe phram phram=memdisk,${MEMDISK}
1781
1782                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
1783                                         modprobe mtdblock
1784                                 fi
1785                         fi
1786
1787                         # Scan local devices for the image
1788                         i=0
1789                         while [ "$i" -lt 60 ]
1790                         do
1791                                 livefs_root=$(find_livefs ${i})
1792
1793                                 if [ -n "${livefs_root}" ]
1794                                 then
1795                                         break
1796                                 fi
1797
1798                                 sleep 1
1799                                 i="$(($i + 1))"
1800                         done
1801                 fi
1802         fi
1803
1804         if [ -z "${livefs_root}" ]
1805         then
1806                 panic "Unable to find a medium containing a live file system"
1807         fi
1808
1809         if [ "${INTEGRITY_CHECK}" ]
1810         then
1811                 integrity_check "${livefs_root}"
1812         fi
1813
1814         if [ "${TORAM}" ]
1815         then
1816                 live_dest="ram"
1817         elif [ "${TODISK}" ]
1818         then
1819                 live_dest="${TODISK}"
1820         fi
1821
1822         if [ "${live_dest}" ]
1823         then
1824                 log_begin_msg "Copying live media to ${live_dest}"
1825                 copy_live_to "${livefs_root}" "${live_dest}"
1826                 log_end_msg
1827         fi
1828
1829         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
1830         # because the mountpoint is left behind in /proc/mounts, so let's get
1831         # rid of it when running from RAM
1832         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
1833         then
1834           losetup -d /dev/loop0
1835           grep -q /isofrom /proc/mounts && umount /isofrom
1836         fi
1837
1838         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
1839         then
1840                 setup_unionfs "${livefs_root}" "${rootmnt}"
1841         else
1842                 mac="$(get_mac)"
1843                 mac="$(echo ${mac} | sed 's/-//g')"
1844                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1845         fi
1846
1847
1848         if [ -n "${ROOT_PID}" ] ; then
1849                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
1850         fi
1851
1852         log_end_msg
1853
1854         # unionfs-fuse needs /dev to be bind-mounted for the duration of
1855         # live-bottom; udev's init script will take care of things after that
1856         if [ "${UNIONTYPE}" = unionfs-fuse ]
1857         then
1858                 mount -n -o bind /dev "${rootmnt}/dev"
1859         fi
1860
1861         # Move to the new root filesystem so that programs there can get at it.
1862         if [ ! -d /root/live/image ]
1863         then
1864                 mkdir -p /root/live/image
1865                 mount --move /live/image /root/live/image
1866         fi
1867
1868         maybe_break live-bottom
1869         log_begin_msg "Running /scripts/live-bottom\n"
1870
1871         run_scripts /scripts/live-bottom
1872         log_end_msg
1873
1874         if [ "${UNIONFS}" = unionfs-fuse ]
1875         then
1876                 umount "${rootmnt}/dev"
1877         fi
1878
1879         exec 1>&6 6>&-
1880         exec 2>&7 7>&-
1881         kill ${tailpid}
1882         [ -w "${rootmnt}/var/log/" ] && cp live.log "${rootmnt}/var/log/" 2>/dev/null
1883 }