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-sata_mv|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 ${copyto}
 574         return 0
 575 }
 576
 577 do_netsetup ()
 578 {
 579         modprobe -q af_packet # For DHCP
 580
 581         udevadm trigger
 582         udevadm settle
 583
 584         [ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
 585         echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
 586
 587         if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && \
 588            [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
 589         then
 590
 591
 592         # support for Syslinux IPAPPEND parameter
 593         # it sets the BOOTIF variable on the kernel parameter
 594
 595         if [ -n "${BOOTIF}" ]
 596         then
 597                 # pxelinux sets BOOTIF to a value based on the mac address of the
 598                 # network card used to PXE boot, so use this value for DEVICE rather
 599                 # than a hard-coded device name from initramfs.conf. this facilitates
 600                 # network booting when machines may have multiple network cards.
 601                 # pxelinux sets BOOTIF to 01-$mac_address
 602
 603                 # strip off the leading "01-", which isn't part of the mac
 604                 # address
 605                 temp_mac=${BOOTIF#*-}
 606
 607                 # convert to typical mac address format by replacing "-" with ":"
 608                 bootif_mac=""
 609                 IFS='-'
 610                 for x in $temp_mac
 611                 do
 612                         if [ -z "$bootif_mac" ]
 613                         then
 614                                 bootif_mac="$x"
 615                         else
 616                                 bootif_mac="$bootif_mac:$x"
 617                         fi
 618                 done
 619                 unset IFS
 620
 621                 # look for devices with matching mac address, and set DEVICE to
 622                 # appropriate value if match is found.
 623
 624                 for device in /sys/class/net/*
 625                 do
 626                         if [ -f "$device/address" ]
 627                         then
 628                                 current_mac=$(cat "$device/address")
 629
 630                                 if [ "$bootif_mac" = "$current_mac" ]
 631                                 then
 632                                         DEVICE=${device##*/}
 633                                         break
 634                                 fi
 635                         fi
 636                 done
 637         fi
 638
 639         # if ethdevice was not specified on the kernel command line
 640         # make sure we try to get a working network configuration
 641         # for *every* present network device (except for loopback of course)
 642         if [ -z "$ETHDEVICE" ] ; then
 643                 echo "If you want to boot from a specific device use bootoption ethdevice=..."
 644                 for device in /sys/class/net/*; do
 645                         dev=${device##*/} ;
 646                         if [ "$dev" != "lo" ] ; then
 647                                 ETHDEVICE="$ETHDEVICE $dev"
 648                         fi
 649                 done
 650         fi
 651
 652         # split args of ethdevice=eth0,eth1 into "eth0 eth1"
 653         for device in $(echo $ETHDEVICE | sed 's/,/ /g') ; do
 654                 devlist="$devlist $device"
 655         done
 656
 657         # this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
 658         # an endless loop; iff execution fails give it two further tries, that's
 659         # why we use '$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                 for interface in ${DEVICE}; do
 681                         ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
 682                         [ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
 683                         if [ "$IPV4ADDR" != "0.0.0.0" ]
 684                         then
 685                                 break
 686                         fi
 687                 done
 688         fi
 689
 690         for interface in ${DEVICE}; do
 691                 # source relevant ipconfig output
 692                 OLDHOSTNAME=${HOSTNAME}
 693                 [ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
 694                 [ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
 695                 export HOSTNAME
 696
 697                 if [ -n "${interface}" ]
 698                 then
 699                         HWADDR="$(cat /sys/class/net/${interface}/address)"
 700                 fi
 701
 702                 if [ ! -e "/etc/resolv.conf" ]
 703                 then
 704                         echo "Creating /etc/resolv.conf"
 705
 706                         if [ -n "${DNSDOMAIN}" ]
 707                         then
 708                                 echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
 709                                 echo "search ${DNSDOMAIN}" > /etc/resolv.conf
 710                         fi
 711
 712                         for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
 713                         do
 714                                 echo "nameserver $i" >> /etc/resolv.conf
 715                         done
 716                 fi
 717
 718                 # Check if we have a network device at all
 719                 if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
 720                    ! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
 721                    ! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
 722                    ! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
 723                    ! ls /sys/class/net/ra0 > /dev/null 2>&1
 724                 then
 725                         panic "No supported network device found, maybe a non-mainline driver is required."
 726                 fi
 727         done
 728 }
 729
 730 do_netmount()
 731 {
 732         do_netsetup
 733
 734         if [ "${NFSROOT}" = "auto" ]
 735         then
 736                 NFSROOT=${ROOTSERVER}:${ROOTPATH}
 737         fi
 738
 739         rc=1
 740
 741         if ( [ -n "${FETCH}" ] || [ -n "${HTTPFS}" ] || [ -n "${FTPFS}" ] )
 742         then
 743                 do_httpmount
 744                 return $?
 745         fi
 746
 747         if [ "${NFSROOT#*:}" = "${NFSROOT}" ] && [ "$NETBOOT" != "cifs" ]
 748         then
 749                 NFSROOT=${ROOTSERVER}:${NFSROOT}
 750         fi
 751
 752         log_begin_msg "Trying netboot from ${NFSROOT}"
 753
 754         if [ "${NETBOOT}" != "nfs" ] && do_cifsmount
 755         then
 756                 rc=0
 757         elif do_nfsmount
 758         then
 759                 NETBOOT="nfs"
 760                 export NETBOOT
 761                 rc=0
 762         fi
 763
 764         log_end_msg
 765         return ${rc}
 766 }
 767
 768 do_iscsi()
 769 {
 770         do_netsetup
 771         #modprobe ib_iser
 772         modprobe iscsi_tcp
 773         local debugopt=""
 774         [ "${DEBUG}" == "Yes" ] && debugopt="-d 8"
 775         #FIXME this name is supposed to be unique - some date + ifconfig hash?
 776         ISCSI_INITIATORNAME="iqn.1993-08.org.debian.live:01:$(echo "${HWADDR}" | sed -e s/://g)"
 777         export ISCSI_INITIATORNAME
 778         if [ -n "${ISCSI_SERVER}" ] ; then
 779                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_SERVER}" -p "${ISCSI_PORT}"
 780         else
 781                 iscsistart $debugopt -i "${ISCSI_INITIATORNAME}" -t "${ISCSI_TARGET}" -g 1 -a "${ISCSI_PORTAL}" -p 3260
 782         fi
 783         if [ $? != 0 ]
 784         then
 785                 panic "Failed to log into iscsi target"
 786         fi
 787         local host="$(ls -d /sys/class/scsi_host/host*/device/iscsi_host:host* \
 788                             /sys/class/scsi_host/host*/device/iscsi_host/host* | sed -e 's:/device.*::' -e 's:.*host::')"
 789         if [ -n "${host}" ]
 790         then
 791                 local devices=""
 792                 local i=0
 793                 while [ -z "${devices}" -a $i -lt 60 ]
 794                 do
 795                         sleep 1
 796                         devices="$(ls -d /sys/class/scsi_device/${host}*/device/block:* \
 797                                          /sys/class/scsi_device/${host}*/device/block/* | sed -e 's!.*[:/]!!')"
 798                         i=$(expr $i + 1)
 799                         echo -ne $i\\r
 800                 done
 801                 for dev in $devices
 802                 do
 803                         if check_dev "null" "/dev/$dev"
 804                         then
 805                                 NETBOOT="iscsi"
 806                                 export NETBOOT
 807                                 return 0;
 808                         fi
 809                 done
 810                 panic "Failed to locate a live device on iSCSI devices (tried: $devices)."
 811         else
 812                 panic "Failed to locate iSCSI host in /sys"
 813         fi
 814 }
 815
 816 do_httpmount ()
 817 {
 818         rc=1
 819
 820         for webfile in HTTPFS FTPFS FETCH
 821         do
 822                 local url="$(eval echo \"\$\{${webfile}\}\")"
 823                 local extension="$(echo "${url}" | sed 's/\(.*\)\.\(.*\)/\2/')"
 824
 825                 if [ -n "$url" ]
 826                 then
 827                         case "${extension}" in
 828                                 iso|squashfs|tgz|tar)
 829                                         if [ "${extension}" = "iso" ]
 830                                         then
 831                                                 mkdir -p "${alt_mountpoint}"
 832                                                 dest="${alt_mountpoint}"
 833                                         else
 834                                                 local dest="${mountpoint}/${LIVE_MEDIA_PATH}"
 835                                                 mount -t ramfs ram "${mountpoint}"
 836                                                 mkdir -p "${dest}"
 837                                         fi
 838                                         if [ "${webfile}" = "FETCH" ]
 839                                         then
 840                                                 case "$url" in
 841                                                         tftp*)
 842                                                                 ip="$(dirname $url | sed -e 's|tftp://||g' -e 's|/.*$||g')"
 843                                                                 rfile="$(echo $url | sed -e "s|tftp://$ip||g")"
 844                                                                 lfile="$(basename $url)"
 845                                                                 log_begin_msg "Trying tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip"
 846                                                                 tftp -g -b 10240 -r $rfile -l ${dest}/$lfile $ip
 847                                                         ;;
 848
 849                                                         *)
 850                                                                 log_begin_msg "Trying wget ${url} -O ${dest}/$(basename ${url})"
 851                                                                 wget "${url}" -O "${dest}/$(basename ${url})"
 852                                                                 ;;
 853                                                 esac
 854                                         else
 855                                                 log_begin_msg "Trying to mount ${url} on ${dest}/$(basename ${url})"
 856                                                 if [ "${webfile}" = "FTPFS" ]
 857                                                 then
 858                                                         FUSE_MOUNT="curlftpfs"
 859                                                         url="$(dirname ${url})"
 860                                                 else
 861                                                         FUSE_MOUNT="httpfs"
 862                                                 fi
 863                                                 modprobe fuse
 864                                                 $FUSE_MOUNT "${url}" "${dest}"
 865                                                 ROOT_PID="$(minips h -C "$FUSE_MOUNT" | { read x y ; echo "$x" ; } )"
 866                                         fi
 867                                         [ ${?} -eq 0 ] && rc=0
 868                                         [ "${extension}" = "tgz" ] && live_dest="ram"
 869                                         if [ "${extension}" = "iso" ]
 870                                         then
 871                                                 isoloop=$(setup_loop "${dest}/$(basename "${url}")" "loop" "/sys/block/loop*" "" '')
 872                                                 mount -t iso9660 "${isoloop}" "${mountpoint}"
 873                                                 rc=${?}
 874                                         fi
 875                                         break
 876                                         ;;
 877
 878                                 *)
 879                                         log_begin_msg "Unrecognized archive extension for ${url}"
 880                                         ;;
 881                         esac
 882                 fi
 883         done
 884
 885         if [ ${rc} != 0 ]
 886         then
 887                 if [ -d "${alt_mountpoint}" ]
 888                 then
 889                         umount "${alt_mountpoint}"
 890                         rmdir "${alt_mountpoint}"
 891                 fi
 892                 umount "${mountpoint}"
 893         elif [ "${webfile}"  != "FETCH" ] ; then
 894                 NETBOOT="${webfile}"
 895                 export NETBOOT
 896         fi
 897
 898         return ${rc}
 899 }
 900
 901 do_nfsmount ()
 902 {
 903         rc=1
 904
 905         modprobe -q nfs
 906
 907         if [ -z "${NFSOPTS}" ]
 908         then
 909                 NFSOPTS=""
 910         fi
 911
 912         log_begin_msg "Trying nfsmount -o nolock -o ro ${NFSOPTS} ${NFSROOT} ${mountpoint}"
 913
 914         # FIXME: This while loop is an ugly HACK round an nfs bug
 915         i=0
 916         while [ "$i" -lt 60 ]
 917         do
 918                 nfsmount -o nolock -o ro ${NFSOPTS} "${NFSROOT}" "${mountpoint}" && rc=0 && break
 919                 sleep 1
 920                 i="$(($i + 1))"
 921         done
 922
 923         return ${rc}
 924 }
 925
 926 do_cifsmount ()
 927 {
 928         rc=1
 929
 930         if [ -x "/sbin/mount.cifs" ]
 931         then
 932                 if [ -z "${NFSOPTS}" ]
 933                 then
 934                         CIFSOPTS="-ouser=root,password="
 935                 else
 936                         CIFSOPTS="${NFSOPTS}"
 937                 fi
 938
 939                 log_begin_msg "Trying mount.cifs ${NFSROOT} ${mountpoint} ${CIFSOPTS}"
 940                 modprobe -q cifs
 941
 942                 if mount.cifs "${NFSROOT}" "${mountpoint}" "${CIFSOPTS}"
 943                 then
 944                         rc=0
 945                 fi
 946         fi
 947
 948         return ${rc}
 949 }
 950
 951 do_snap_copy ()
 952 {
 953         fromdev="${1}"
 954         todir="${2}"
 955         snap_type="${3}"
 956         size=$(fs_size "${fromdev}" "" "used")
 957
 958         if [ -b "${fromdev}" ]
 959         then
 960                 log_success_msg "Copying snapshot ${fromdev} to ${todir}..."
 961
 962                 # look for free mem
 963                 if [ -n "${HOMEMOUNTED}" -a "${snap_type}" = "HOME" ]
 964                 then
 965                         todev=$(awk -v pat="$(base_path ${todir})" '$2 == pat { print $1 }' /proc/mounts)
 966                         freespace=$(df -k | awk '/'${todev}'/{print $4}')
 967                 else
 968                         freespace=$(awk '/^MemFree:/{f=$2} /^Cached:/{c=$2} END{print f+c}' /proc/meminfo)
 969                 fi
 970
 971                 tomount="/mnt/tmpsnap"
 972
 973                 if [ ! -d "${tomount}" ]
 974                 then
 975                         mkdir -p "${tomount}"
 976                 fi
 977
 978                 fstype=$(get_fstype "${fromdev}")
 979
 980                 if [ -n "${fstype}" ]
 981                 then
 982                         # Copying stuff...
 983                         mount -o ro -t "${fstype}" "${fromdev}" "${tomount}" || log_warning_msg "Error in mount -t ${fstype} -o ro ${fromdev} ${tomount}"
 984                         cp -a "${tomount}"/* ${todir}
 985                         umount "${tomount}"
 986                 else
 987                         log_warning_msg "Unrecognized fstype: ${fstype} on ${fromdev}:${snap_type}"
 988                 fi
 989
 990                 rmdir "${tomount}"
 991
 992                 if echo ${fromdev} | grep -qs loop
 993                 then
 994                         losetup -d "${fromdev}"
 995                 fi
 996
 997                 return 0
 998         else
 999                 log_warning_msg "Unable to find the snapshot ${snap_type} medium"
1000                 return 1
1001         fi
1002 }
1003
1004 find_snap ()
1005 {
1006         # Look for ${snap_label}.* in block devices
1007         snap_label="${1}"
1008
1009         if [ "${PERSISTENT}" != "nofiles" ]
1010         then
1011                 # search for image files
1012                 snapdata=$(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")
1013         fi
1014
1015         if [ -z "${snapdata}" ]
1016         then
1017                 snapdata=$(find_cow_device "${snap_label}")
1018         fi
1019         echo "${snapdata}"
1020 }
1021
1022 try_snap ()
1023 {
1024         # copy the contents of previously found snapshot to ${snap_mount}
1025         # and remember the device and filename for resync on exit in live-boot.init
1026
1027         snapdata="${1}"
1028         snap_mount="${2}"
1029         snap_type="${3}"
1030         snap_relpath="${4}"
1031
1032         if [ -z "${snap_relpath}" ]
1033         then
1034                 # root snapshot, default usage
1035                 snap_relpath="/"
1036         else
1037                 # relative snapshot (actually used just for "/home" snapshots)
1038                 snap_mount="${2}${snap_relpath}"
1039         fi
1040
1041         if [ -n "${snapdata}" ] && [ ! -b "${snapdata}" ]
1042         then
1043                 log_success_msg "found snapshot: ${snapdata}"
1044                 snapdev="$(echo ${snapdata} | cut -f1 -d ' ')"
1045                 snapback="$(echo ${snapdata} | cut -f2 -d ' ')"
1046                 snapfile="$(echo ${snapdata} | cut -f3 -d ' ')"
1047
1048                 if ! try_mount "${snapdev}" "${snapback}" "ro"
1049                 then
1050                         break
1051                 fi
1052
1053                 RES="0"
1054
1055                 if echo "${snapfile}" | grep -qs '\(squashfs\|ext2\|ext3\|ext4\|jffs2\)'
1056                 then
1057                         # squashfs, jffs2 or ext2/ext3/ext4 snapshot
1058                         dev=$(get_backing_device "${snapback}/${snapfile}")
1059
1060                         do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1061                         RES="$?"
1062                 else
1063                         # cpio.gz snapshot
1064
1065                         # Unfortunately klibc's cpio is incompatible with the
1066                         # rest of the world; everything else requires -u -d,
1067                         # while klibc doesn't implement them. Try to detect
1068                         # whether it's in use.
1069                         cpiopath="$(which cpio)" || true
1070                         if [ "$cpiopath" ] && grep -aq /lib/klibc "$cpiopath"
1071                         then
1072                                 cpioargs=
1073                         else
1074                                 cpioargs='--unconditional --make-directories'
1075                         fi
1076
1077                         cd "${snap_mount}" && zcat "${snapback}/${snapfile}" | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse 2>/dev/null
1078                         RES="$?"
1079
1080                         if [ "${RES}" != "0" ]
1081                         then
1082                                 log_warning_msg "failure to \"zcat ${snapback}/${snapfile} | $cpiopath $cpioargs --extract --preserve-modification-time --no-absolute-filenames --sparse\""
1083                         fi
1084                 fi
1085
1086                 umount "${snapback}" ||  log_warning_msg "failure to \"umount ${snapback}\""
1087
1088                 if [ "${RES}" != "0" ]
1089                 then
1090                         log_warning_msg "Impossible to include the ${snapfile} Snapshot file"
1091                 fi
1092
1093         elif [ -b "${snapdata}" ]
1094         then
1095                 # Try to find if it could be a snapshot partition
1096                 dev="${snapdata}"
1097                 log_success_msg "found snapshot ${snap_type} device on ${dev}"
1098                 if echo "${dev}" | grep -qs loop
1099                 then
1100                         # strange things happens, user confused?
1101                         snaploop=$( losetup ${dev} | awk '{print $3}' | tr -d '()' )
1102                         snapfile=$(basename ${snaploop})
1103                         snapdev=$(awk -v pat="$( dirname ${snaploop})" '$2 == pat { print $1 }' /proc/mounts)
1104                 else
1105                         snapdev="${dev}"
1106                 fi
1107
1108                 if ! do_snap_copy "${dev}" "${snap_mount}" "${snap_type}"
1109                 then
1110                         log_warning_msg "Impossible to include the ${snap_type} Snapshot (i)"
1111                         return 1
1112                 else
1113                         if [ -n "${snapfile}" ]
1114                         then
1115                                 # it was a loop device, user confused
1116                                 umount ${snapdev}
1117                         fi
1118                 fi
1119         else
1120                 log_warning_msg "Impossible to include the ${snap_type} Snapshot (o)"
1121                 return 1
1122         fi
1123
1124         echo "export ${snap_type}SNAP=${snap_relpath}:${snapdev}:${snapfile}" >> snapshot.conf # for resync on reboot/halt
1125         return 0
1126 }
1127
1128 setup_unionfs ()
1129 {
1130         image_directory="${1}"
1131         rootmnt="${2}"
1132         addimage_directory="${3}"
1133
1134         case ${UNIONTYPE} in
1135                 aufs|unionfs)
1136                         modprobe -q -b ${UNIONTYPE}
1137
1138                         if ! cut -f2 /proc/filesystems | grep -q "^${UNIONTYPE}\$" && [ -x /bin/unionfs-fuse ]
1139                         then
1140                                 echo "${UNIONTYPE} not available, falling back to unionfs-fuse."
1141                                 echo "This might be really slow."
1142
1143                                 UNIONTYPE="unionfs-fuse"
1144                         fi
1145                         ;;
1146         esac
1147
1148         if [ "${UNIONTYPE}" = unionfs-fuse ]
1149         then
1150                 modprobe fuse
1151         fi
1152
1153         # run-init can't deal with images in a subdir, but we're going to
1154         # move all of these away before it runs anyway.  No, we're not,
1155         # put them in / since move-mounting them into / breaks mono and
1156         # some other apps.
1157
1158         croot="/"
1159
1160         # Let's just mount the read-only file systems first
1161         rofsstring=""
1162         rofslist=""
1163
1164         if [ "${UNIONTYPE}" = "aufs" ]
1165         then
1166                 roopt="rr"
1167                 noxino_opt="noxino,"
1168         elif [ "${UNIONTYPE}" = "unionfs-fuse" ]
1169         then
1170                 roopt="RO"
1171         else
1172                 roopt="ro"
1173         fi
1174
1175         if [ -z "${PLAIN_ROOT}" ]
1176         then
1177                 # Read image names from ${MODULE}.module if it exists
1178                 if [ -e "${image_directory}/filesystem.${MODULE}.module" ]
1179                 then
1180                         for IMAGE in $(cat ${image_directory}/filesystem.${MODULE}.module)
1181                         do
1182                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1183                         done
1184                 elif [ -e "${image_directory}/${MODULE}.module" ]
1185                 then
1186                         for IMAGE in $(cat ${image_directory}/${MODULE}.module)
1187                         do
1188                                 image_string="${image_string} ${image_directory}/${IMAGE}"
1189                         done
1190                 else
1191                         # ${MODULE}.module does not exist, create a list of images
1192                         for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1193                         do
1194                                 for IMAGE in "${image_directory}"/*."${FILESYSTEM}"
1195                                 do
1196                                         if [ -e "${IMAGE}" ]
1197                                         then
1198                                                 image_string="${image_string} ${IMAGE}"
1199                                         fi
1200                                 done
1201                         done
1202
1203                         if [ -n "${addimage_directory}" ] && [ -d "${addimage_directory}" ]
1204                         then
1205                                 for FILESYSTEM in squashfs ext2 ext3 ext4 xfs jffs2 dir
1206                                 do
1207                                         for IMAGE in "${addimage_directory}"/*."${FILESYSTEM}"
1208                                         do
1209                                                 if [ -e "${IMAGE}" ]
1210                                                 then
1211                                                         image_string="${image_string} ${IMAGE}"
1212                                                 fi
1213                                         done
1214                                 done
1215                         fi
1216
1217                         # Now sort the list
1218                         image_string="$(echo ${image_string} | sed -e 's/ /\n/g' | sort )"
1219                 fi
1220
1221         [ -n "${MODULETORAMFILE}" ] && image_string="${image_directory}/$(basename ${MODULETORAMFILE})"
1222
1223                 mkdir -p "${croot}"
1224
1225                 for image in ${image_string}
1226                 do
1227                         imagename=$(basename "${image}")
1228
1229                         export image devname
1230                         maybe_break live-realpremount
1231                         log_begin_msg "Running /scripts/live-realpremount"
1232                         run_scripts /scripts/live-realpremount
1233                         log_end_msg
1234
1235                         if [ -d "${image}" ]
1236                         then
1237                                 # it is a plain directory: do nothing
1238                                 rofsstring="${image}=${roopt}:${rofsstring}"
1239                                 rofslist="${image} ${rofslist}"
1240                         elif [ -f "${image}" ]
1241                         then
1242                                 if losetup --help 2>&1 | grep -q -- "-r\b"
1243                                 then
1244                                         backdev=$(get_backing_device "${image}" "-r")
1245                                 else
1246                                         backdev=$(get_backing_device "${image}")
1247                                 fi
1248                                 fstype=$(get_fstype "${backdev}")
1249
1250                                 if [ "${fstype}" = "unknown" ]
1251                                 then
1252                                         panic "Unknown file system type on ${backdev} (${image})"
1253                                 fi
1254
1255                                 if [ -z "${fstype}" ]
1256                                 then
1257                                         fstype="${imagename##*.}"
1258                                         log_warning_msg "Unknown file system type on ${backdev} (${image}), assuming ${fstype}."
1259                                 fi
1260
1261                                 mkdir -p "${croot}/${imagename}"
1262                                 log_begin_msg "Mounting \"${image}\" on \"${croot}${imagename}\" via \"${backdev}\""
1263                                 mount -t "${fstype}" -o ro,noatime "${backdev}" "${croot}/${imagename}" || panic "Can not mount ${backdev} (${image}) on ${croot}/${imagename}" && rofsstring="${croot}/${imagename}=${roopt}:${rofsstring}" && rofslist="${croot}/${imagename} ${rofslist}"
1264                                 log_end_msg
1265                         fi
1266                 done
1267         else
1268                 # we have a plain root system
1269                 mkdir -p "${croot}/filesystem"
1270                 log_begin_msg "Mounting \"${image_directory}\" on \"${croot}/filesystem\""
1271                 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}"
1272                 # probably broken:
1273                 mount -o bind ${croot}/filesystem $mountpoint
1274                 log_end_msg
1275         fi
1276
1277         rofsstring=${rofsstring%:}
1278
1279         mkdir -p /cow
1280
1281         # Looking for "${root_persistence}" device or file
1282         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1283         then
1284                 if [ -z "${QUICKUSBMODULES}" ]
1285                 then
1286                         # Load USB modules
1287                         num_block=$(ls -l /sys/block | wc -l)
1288                         for module in sd_mod uhci-hcd ehci-hcd ohci-hcd usb-storage
1289                         do
1290                                 modprobe -q -b ${module}
1291                         done
1292
1293                         udevadm trigger
1294                         udevadm settle
1295
1296                         # For some reason, udevsettle does not block in this scenario,
1297                         # so we sleep for a little while.
1298                         #
1299                         # See https://bugs.launchpad.net/ubuntu/+source/casper/+bug/84591
1300                         for timeout in 5 4 3 2 1
1301                         do
1302                                 sleep 1
1303
1304                                 if [ $(ls -l /sys/block | wc -l) -gt ${num_block} ]
1305                                 then
1306                                         break
1307                                 fi
1308                         done
1309                 fi
1310
1311                 # search for label and files (this could be hugely optimized)
1312                 cowprobe=$(find_cow_device "${root_persistence}")
1313                 if [ -b "${cowprobe}" ]
1314                 then
1315                         # Blacklist /cow device, to avoid inconsistent setups for overlapping snapshots
1316                         # makes sense to have both persistence for /cow and /home mounted, maybe also with
1317                         # snapshots to be sure to really store some e.g key config files,
1318                         # but not on the same media
1319                         blacklistdev="${cowprobe}"
1320                         PERSISTENCE_IS_ON="1"
1321                         export PERSISTENCE_IS_ON
1322                 fi
1323                 # homecow just mount something on /home, this should be generalized some way
1324                 homecow=$(find_cow_device "${home_persistence}" "${blacklistdev}")
1325                 if [ -b "${homecow}" ]
1326                 then
1327                         PERSISTENCE_IS_ON="1"
1328                         export PERSISTENCE_IS_ON
1329                 fi
1330                 root_snapdata=$(find_snap "${root_snapshot_label}" "${blacklistdev}")
1331                 # This second type should be removed when snapshot will get smarter,
1332                 # hence when "/etc/live-snapshot*list" will be supported also by
1333                 # ext2|ext3|ext4|jffs2 snapshot types.
1334                 home_snapdata=$(find_snap "${home_snapshot_label}" "${blacklistdev}")
1335
1336                 if [ -b "${cowprobe}" ]
1337                 then
1338                         cowdevice=${cowprobe}
1339                         cow_fstype=$(get_fstype "${cowprobe}")
1340                         cow_mountopt="rw,noatime"
1341
1342                         if [ "${FORCEPERSISTENTFSCK}" = "Yes" ]
1343                         then
1344                                 fsck -y ${cowdevice}
1345                         fi
1346                 else
1347                         log_warning_msg "Unable to find the persistent medium"
1348                         cowdevice="tmpfs"
1349                         cow_fstype="tmpfs"
1350                         cow_mountopt="rw,noatime,mode=755"
1351                 fi
1352         elif [ -n "${NFS_COW}" ] && [ -z "${NOPERSISTENT}" ]
1353         then
1354                 # check if there are any nfs options
1355                 if echo ${NFS_COW}|grep -q ','
1356                 then
1357                         nfs_cow_opts="-o nolock,$(echo ${NFS_COW}|cut -d, -f2-)"
1358                         nfs_cow=$(echo ${NFS_COW}|cut -d, -f1)
1359                 else
1360                         nfs_cow_opts="-o nolock"
1361                         nfs_cow=${NFS_COW}
1362                 fi
1363                 mac="$(get_mac)"
1364                 if [ -n "${mac}" ]
1365                 then
1366                         cowdevice=$(echo ${nfs_cow}|sed "s/client_mac_address/${mac}/")
1367                         cow_fstype="nfs"
1368                 else
1369                         panic "unable to determine mac address"
1370                 fi
1371         else
1372                 cowdevice="tmpfs"
1373                 cow_fstype="tmpfs"
1374                 cow_mountopt="rw,noatime,mode=755"
1375         fi
1376
1377         if [ "${cow_fstype}" = "nfs" ]
1378         then
1379                 log_begin_msg \
1380                         "Trying nfsmount ${nfs_cow_opts} ${cowdevice} /cow"
1381                 nfsmount ${nfs_cow_opts} ${cowdevice} /cow || \
1382                         panic "Can not mount ${cowdevice} (n: ${cow_fstype}) on /cow"
1383         else
1384                 mount -t ${cow_fstype} -o ${cow_mountopt} ${cowdevice} /cow || \
1385                         panic "Can not mount ${cowdevice} (o: ${cow_fstype}) on /cow"
1386         fi
1387
1388         rofscount=$(echo ${rofslist} |wc -w)
1389
1390         if [ -n "${EXPOSED_ROOT}" ]
1391         then
1392                 if [ ${rofscount} -ne 1 ]
1393                 then
1394                         panic "only one RO file system supported with exposedroot: ${rofslist}"
1395                 fi
1396                 exposedrootfs=${rofslist%% }
1397
1398                 mount --bind ${exposedrootfs} ${rootmnt} || \
1399                         panic "bind mount of ${exposedrootfs} failed"
1400
1401                 if [ -z "${SKIP_UNION_MOUNTS}" ]
1402                 then
1403                         cow_dirs='/var/tmp /var/lock /var/run /var/log /var/spool /home /var/lib/live'
1404                 else
1405                         cow_dirs=''
1406                 fi
1407
1408                 for dir in ${cow_dirs}; do
1409                         mkdir -p /cow${dir}
1410
1411                         case "${UNIONTYPE}" in
1412                                 unionfs-fuse)
1413                                         (ulimit -n 16384; unionfs-fuse -o cow -o noinitgroups -o default_permissions -o allow_other -o use_ino -o suid /cow=RW:${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}")
1414                                         mkdir -p /dev/.initramfs/varrun
1415                                         pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1416                                         ;;
1417
1418                                 *)
1419                                         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}${dir}=ro"
1420                                         ;;
1421                         esac
1422                 done
1423         else
1424                 case "${UNIONTYPE}" in
1425                         unionfs-fuse)
1426                                 (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}")
1427                                 mkdir -p /dev/.initramfs/varrun
1428                                 pidof unionfs-fuse >> /dev/.initramfs/varrun/sendsigs.omit || true
1429                                 ;;
1430
1431                         *)
1432                                 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:${rofsstring}"
1433                                 ;;
1434                 esac
1435         fi
1436
1437         # Correct the permissions of /:
1438         chmod 0755 "${rootmnt}"
1439
1440         # tmpfs file systems
1441         touch /etc/fstab
1442         mkdir -p "${rootmnt}/live"
1443         mount -t tmpfs tmpfs ${rootmnt}/live
1444
1445         # Adding other custom mounts
1446         if [ -n "${PERSISTENT}" ] && [ -z "${NOPERSISTENT}" ]
1447         then
1448                 # directly mount /home
1449                 # FIXME: add a custom mounts configurable system
1450
1451                 if [ -b "${homecow}" ]
1452                 then
1453                         mount -t $(get_fstype "${homecow}") -o rw,noatime "${homecow}" "${rootmnt}/home"
1454                         export HOMEMOUNTED=1 # used to proper calculate free space in do_snap_copy()
1455                 else
1456                         log_warning_msg "Unable to find the persistent home medium"
1457                 fi
1458
1459                 # Look for other snapshots to copy in
1460                 try_snap "${root_snapdata}" "${rootmnt}" "ROOT"
1461                 # This second type should be removed when snapshot grow smarter
1462                 try_snap "${home_snapdata}" "${rootmnt}" "HOME" "/home"
1463         fi
1464
1465         if [ -n "${SHOWMOUNTS}" ]
1466         then
1467                 for d in ${rofslist}
1468                 do
1469                         mkdir -p "${rootmnt}/live/${d##*/}"
1470
1471                         case d in
1472                                 *.dir)
1473                                         # do nothing # mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1474                                         ;;
1475
1476                                 *)
1477                                         case "${UNIONTYPE}" in
1478                                                 unionfs-fuse)
1479                                                         mount -o bind "${d}" "${rootmnt}/live/${d##*/}"
1480                                                         ;;
1481
1482                                                 *)
1483                                                         mount -o move "${d}" "${rootmnt}/live/${d##*/}"
1484                                                         ;;
1485                                         esac
1486                                         ;;
1487                         esac
1488                 done
1489         fi
1490
1491         # shows cow fs on /cow for use by live-snapshot
1492         mkdir -p "${rootmnt}/live/cow"
1493         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 ${rootmnt}/live/cow"
1494 }
1495
1496 check_dev ()
1497 {
1498         sysdev="${1}"
1499         devname="${2}"
1500         skip_uuid_check="${3}"
1501
1502         # support for fromiso=.../isofrom=....
1503         if [ -n "$FROMISO" ]
1504         then
1505                 ISO_DEVICE=$(dirname $FROMISO)
1506                 if ! [ -b $ISO_DEVICE ]
1507                 then
1508                         # to support unusual device names like /dev/cciss/c0d0p1
1509                         # as well we have to identify the block device name, let's
1510                         # do that for up to 15 levels
1511                         i=15
1512                         while [ -n "$ISO_DEVICE" ] && [ "$i" -gt 0 ]
1513                         do
1514                                 ISO_DEVICE=$(dirname ${ISO_DEVICE})
1515                                 [ -b "$ISO_DEVICE" ] && break
1516                                 i=$(($i -1))
1517                         done
1518                 fi
1519
1520                 if [ "$ISO_DEVICE" = "/" ]
1521                 then
1522                         echo "Warning: device for bootoption isofrom= ($FROMISO) not found.">>/live.log
1523                 else
1524                         mkdir /isofrom
1525                         mount "$ISO_DEVICE" /isofrom
1526                         ISO_NAME="$(echo $FROMISO | sed "s|$ISO_DEVICE||")"
1527                         loopdevname=$(setup_loop "/isofrom/${ISO_NAME}" "loop" "/sys/block/loop*" "" '')
1528                         devname="${loopdevname}"
1529                 fi
1530         fi
1531
1532         if [ -z "${devname}" ]
1533         then
1534                 devname=$(sys2dev "${sysdev}")
1535         fi
1536
1537         if [ -d "${devname}" ]
1538         then
1539                 mount -o bind "${devname}" $mountpoint || continue
1540
1541                 if is_live_path $mountpoint
1542                 then
1543                         echo $mountpoint
1544                         return 0
1545                 else
1546                         umount $mountpoint
1547                 fi
1548         fi
1549         [ -e "$devname" ] || continue
1550
1551         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1552         then
1553                 loopdevname=$(setup_loop "${devname}" "loop" "/sys/block/loop*" "${LIVE_MEDIA_OFFSET}" '')
1554                 devname="${loopdevname}"
1555         fi
1556
1557         fstype=$(get_fstype "${devname}")
1558
1559         if is_supported_fs ${fstype}
1560         then
1561                 devuid=$(blkid -o value -s UUID "$devname")
1562                 [ -n "$devuid" ] && grep -qs "\<$devuid\>" $tried && continue
1563                 mount -t ${fstype} -o ro,noatime "${devname}" ${mountpoint} || continue
1564                 [ -n "$devuid" ] && echo "$devuid" >> $tried
1565
1566                 if is_live_path ${mountpoint} && \
1567                         ([ "${skip_uuid_check}" ] || matches_uuid ${mountpoint})
1568                 then
1569                         echo ${mountpoint}
1570                         return 0
1571                 else
1572                         umount ${mountpoint}
1573                 fi
1574         fi
1575
1576         if [ -n "${LIVE_MEDIA_OFFSET}" ]
1577         then
1578                 losetup -d "${loopdevname}"
1579         fi
1580
1581         return 1
1582 }
1583
1584 find_livefs ()
1585 {
1586         timeout="${1}"
1587
1588         # don't start autodetection before timeout has expired
1589         if [ -n "${LIVE_MEDIA_TIMEOUT}" ]
1590         then
1591                 if [ "${timeout}" -lt "${LIVE_MEDIA_TIMEOUT}" ]
1592                 then
1593                         return 1
1594                 fi
1595         fi
1596
1597         # first look at the one specified in the command line
1598         case "${LIVE_MEDIA}" in
1599                 removable-usb)
1600                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1601                         do
1602                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1603                                 then
1604                                         if readlink ${sysblock} | grep -q usb ||
1605                                            readlink ${sysblock}/device | grep -q usb # linux < 2.6.29
1606                                         then
1607                                                 for dev in $(subdevices "${sysblock}")
1608                                                 do
1609                                                         if check_dev "${dev}"
1610                                                         then
1611                                                                 return 0
1612                                                         fi
1613                                                 done
1614                                         fi
1615                                 fi
1616                         done
1617                         return 1
1618                         ;;
1619
1620                 removable)
1621                         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -vE "/(loop|ram|dm-|fd)")
1622                         do
1623                                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1624                                 then
1625                                         for dev in $(subdevices "${sysblock}")
1626                                         do
1627                                                 if check_dev "${dev}"
1628                                                 then
1629                                                         return 0
1630                                                 fi
1631                                         done
1632                                 fi
1633                         done
1634                         return 1
1635                         ;;
1636
1637                 *)
1638                         if [ ! -z "${LIVE_MEDIA}" ]
1639                         then
1640                                 if check_dev "null" "${LIVE_MEDIA}" "skip_uuid_check"
1641                                 then
1642                                         return 0
1643                                 fi
1644                         fi
1645                         ;;
1646         esac
1647
1648         # or do the scan of block devices
1649         # prefer removable devices over non-removable devices, so scan them first
1650         for sysblock in $(echo /sys/block/* | tr ' ' '\n' | egrep -v "/(loop|ram|dm-|fd)")
1651         do
1652                 if [ "$(cat ${sysblock}/removable)" = "1" ]
1653                 then
1654                         removable_devices_to_scan="$removable_devices_to_scan $sysblock"
1655                 else
1656                         nonremovable_devices_to_scan="$nonremovable_devices_to_scan $sysblock"
1657                 fi
1658         done
1659         devices_to_scan="$removable_devices_to_scan $nonremovable_devices_to_scan"
1660
1661         for sysblock in $devices_to_scan
1662         do
1663                 devname=$(sys2dev "${sysblock}")
1664                 [ -e "$devname" ] || continue
1665                 fstype=$(get_fstype "${devname}")
1666
1667                 if /lib/udev/cdrom_id ${devname} > /dev/null
1668                 then
1669                         if check_dev "null" "${devname}"
1670                         then
1671                                 return 0
1672                         fi
1673                 elif is_nice_device "${sysblock}"
1674                 then
1675                         for dev in $(subdevices "${sysblock}")
1676                         do
1677                                 if check_dev "${dev}"
1678                                 then
1679                                         return 0
1680                                 fi
1681                         done
1682                 elif [ "${fstype}" = "squashfs" -o \
1683                         "${fstype}" = "btrfs" -o \
1684                         "${fstype}" = "ext2" -o \
1685                         "${fstype}" = "ext3" -o \
1686                         "${fstype}" = "ext4" -o \
1687                         "${fstype}" = "jffs2" ]
1688                 then
1689                         # This is an ugly hack situation, the block device has
1690                         # an image directly on it.  It's hopefully
1691                         # live-boot, so take it and run with it.
1692                         ln -s "${devname}" "${devname}.${fstype}"
1693                         echo "${devname}.${fstype}"
1694                         return 0
1695                 fi
1696         done
1697
1698         return 1
1699 }
1700
1701 integrity_check ()
1702 {
1703         media_mountpoint="${1}"
1704
1705         log_begin_msg "Checking media integrity"
1706
1707         cd ${media_mountpoint}
1708         /bin/md5sum -c md5sum.txt < /dev/tty8 > /dev/tty8
1709         RC="${?}"
1710
1711         log_end_msg
1712
1713         if [ "${RC}" -eq 0 ]
1714         then
1715                 log_success_msg "Everything ok, will reboot in 10 seconds."
1716                 sleep 10
1717                 cd /
1718                 umount ${media_mountpoint}
1719                 sync
1720                 echo u > /proc/sysrq-trigger
1721                 echo b > /proc/sysrq-trigger
1722         else
1723                 panic "Not ok, a media defect is likely, switch to VT8 for details."
1724         fi
1725 }
1726
1727 mountroot ()
1728 {
1729         if [ -x /scripts/local-top/cryptroot ]; then
1730             /scripts/local-top/cryptroot
1731         fi
1732
1733         exec 6>&1
1734         exec 7>&2
1735         exec > live.log
1736         exec 2>&1
1737         tail -f live.log >&7 &
1738         tailpid="${!}"
1739
1740         # Ensure 'panic' function is overridden
1741         . /scripts/live-functions
1742
1743         Arguments
1744
1745         maybe_break live-premount
1746         log_begin_msg "Running /scripts/live-premount"
1747         run_scripts /scripts/live-premount
1748         log_end_msg
1749
1750         # Needed here too because some things (*cough* udev *cough*)
1751         # changes the timeout
1752
1753         if [ ! -z "${NETBOOT}" ] || [ ! -z "${FETCH}" ] || [ ! -z "${HTTPFS}" ] || [ ! -z "${FTPFS}" ]
1754         then
1755                 if do_netmount
1756                 then
1757                         livefs_root="${mountpoint}"
1758                 else
1759                         panic "Unable to find a live file system on the network"
1760                 fi
1761         else
1762                 if [ -n "${ISCSI_PORTAL}" ]
1763                 then
1764                         do_iscsi && livefs_root="${mountpoint}"
1765                 elif [ -n "${PLAIN_ROOT}" ] && [ -n "${ROOT}" ]
1766                 then
1767                         # Do a local boot from hd
1768                         livefs_root=${ROOT}
1769                 else
1770                         if [ -x /usr/bin/memdiskfind ]
1771                         then
1772                                 MEMDISK=$(/usr/bin/memdiskfind)
1773
1774                                 if [ $? -eq 0 ]
1775                                 then
1776                                         # We found a memdisk, set up phram
1777                                         modprobe phram phram=memdisk,${MEMDISK}
1778
1779                                         # Load mtdblock, the memdisk will be /dev/mtdblock0
1780                                         modprobe mtdblock
1781                                 fi
1782                         fi
1783
1784                         # Scan local devices for the image
1785                         i=0
1786                         while [ "$i" -lt 60 ]
1787                         do
1788                                 livefs_root=$(find_livefs ${i})
1789
1790                                 if [ -n "${livefs_root}" ]
1791                                 then
1792                                         break
1793                                 fi
1794
1795                                 sleep 1
1796                                 i="$(($i + 1))"
1797                         done
1798                 fi
1799         fi
1800
1801         if [ -z "${livefs_root}" ]
1802         then
1803                 panic "Unable to find a medium containing a live file system"
1804         fi
1805
1806         if [ "${INTEGRITY_CHECK}" ]
1807         then
1808                 integrity_check "${livefs_root}"
1809         fi
1810
1811         if [ "${TORAM}" ]
1812         then
1813                 live_dest="ram"
1814         elif [ "${TODISK}" ]
1815         then
1816                 live_dest="${TODISK}"
1817         fi
1818
1819         if [ "${live_dest}" ]
1820         then
1821                 log_begin_msg "Copying live media to ${live_dest}"
1822                 copy_live_to "${livefs_root}" "${live_dest}"
1823                 log_end_msg
1824         fi
1825
1826         # if we do not unmount the ISO we can't run "fsck /dev/ice" later on
1827         # because the mountpoint is left behind in /proc/mounts, so let's get
1828         # rid of it when running from RAM
1829         if [ -n "$FROMISO" ] && [ "${TORAM}" ]
1830         then
1831           losetup -d /dev/loop0
1832           grep -q /isofrom /proc/mounts && umount /isofrom
1833         fi
1834
1835         if [ -n "${MODULETORAMFILE}" ] || [ -n "${PLAIN_ROOT}" ]
1836         then
1837                 setup_unionfs "${livefs_root}" "${rootmnt}"
1838         else
1839                 mac="$(get_mac)"
1840                 mac="$(echo ${mac} | sed 's/-//g')"
1841                 mount_images_in_directory "${livefs_root}" "${rootmnt}" "${mac}"
1842         fi
1843
1844
1845         if [ -n "${ROOT_PID}" ] ; then
1846                 echo "${ROOT_PID}" > "${rootmnt}"/live/root.pid
1847         fi
1848
1849         log_end_msg
1850
1851         # unionfs-fuse needs /dev to be bind-mounted for the duration of
1852         # live-bottom; udev's init script will take care of things after that
1853         if [ "${UNIONTYPE}" = unionfs-fuse ]
1854         then
1855                 mount -n -o bind /dev "${rootmnt}/dev"
1856         fi
1857
1858         # Move to the new root filesystem so that programs there can get at it.
1859         if [ ! -d /root/live/image ]
1860         then
1861                 mkdir -p /root/live/image
1862                 mount --move /live/image /root/live/image
1863         fi
1864
1865         # aufs2 in kernel versions around 2.6.33 has a regression:
1866         # directories can't be accessed when read for the first the time,
1867         # causing a failure for example when accessing /var/lib/fai
1868         # when booting FAI, this simple workaround solves it
1869         ls /root/* >/dev/null 2>&1
1870
1871         # copy snapshot configuration if exists
1872         if [ -f snapshot.conf ]
1873         then
1874                 log_begin_msg "Copying snapshot.conf to ${rootmnt}/etc/live/boot.d"
1875                 if [ ! -d "${rootmnt}/etc/live/boot.d" ]
1876                 then
1877                         mkdir -p "${rootmnt}/etc/live/boot.d"
1878                 fi
1879                 cp snapshot.conf "${rootmnt}/etc/live/boot.d/"
1880                 log_end_msg
1881         fi
1882
1883         maybe_break live-bottom
1884         log_begin_msg "Running /scripts/live-bottom\n"
1885
1886         run_scripts /scripts/live-bottom
1887         log_end_msg
1888
1889         if [ "${UNIONFS}" = unionfs-fuse ]
1890         then
1891                 umount "${rootmnt}/dev"
1892         fi
1893
1894         exec 1>&6 6>&-
1895         exec 2>&7 7>&-
1896         kill ${tailpid}
1897         [ -w "${rootmnt}/var/log/" ] && cp live.log "${rootmnt}/var/log/" 2>/dev/null
1898 }