defaults/linuxrc

   1 #!/bin/sh
   2
   3 . /etc/initrd.defaults
   4 . /etc/initrd.scripts
   5
   6 splash() {
   7         return 0
   8 }
   9
  10 [ -e /etc/initrd.splash ] && . /etc/initrd.splash
  11
  12 # Clean input/output
  13 exec >${CONSOLE} <${CONSOLE} 2>&1
  14
  15 if [ "$$" != '1' ]
  16 then
  17         echo '/linuxrc has to be run as the init process as the one'
  18         echo 'with a PID of 1. Try adding init="/linuxrc" to the'
  19         echo 'kernel command line or running "exec /linuxrc".'
  20         exit 1
  21 fi
  22
  23 mount -t proc -o noexec,nosuid,nodev proc /proc >/dev/null 2>&1
  24 mount -o remount,rw / >/dev/null 2>&1
  25
  26 # Set up symlinks
  27 /bin/busybox --install -s
  28
  29 if [ "$0" = '/init' ]
  30 then
  31         [ -e /linuxrc ] && rm /linuxrc
  32 fi
  33
  34 quiet_kmsg
  35
  36 CMDLINE=$(cat /proc/cmdline)
  37 # Scan CMDLINE for any specified real_root= or cdroot arguments
  38 FAKE_ROOT=''
  39 REAL_ROOTFLAGS=''
  40 ROOTFSTYPE='auto'
  41 CRYPT_SILENT=0
  42 for x in ${CMDLINE}
  43 do
  44         case "${x}" in
  45                 real_root=*)
  46                         REAL_ROOT=${x#*=}
  47                 ;;
  48                 root=*)
  49                         FAKE_ROOT=${x#*=}
  50                 ;;
  51                 subdir=*)
  52                         SUBDIR=${x#*=}
  53                 ;;
  54                 real_init=*)
  55                         REAL_INIT=${x#*=}
  56                 ;;
  57                 init_opts=*)
  58                         INIT_OPTS=${x#*=}
  59                 ;;
  60                 # Livecd options
  61                 cdroot)
  62                         CDROOT=1
  63                 ;;
  64                 cdroot=*)
  65                         CDROOT=1
  66                         CDROOT_DEV=${x#*=}
  67                 ;;
  68                 cdroot_type=*)
  69                         CDROOT_TYPE=${x#*=}
  70                 ;;
  71                 # Start livecd loop, looptype options
  72                 loop=*)
  73                         LOOP=${x#*=}
  74                 ;;
  75                 looptype=*)
  76                         LOOPTYPE=${x#*=}
  77                 ;;
  78                 isoboot=*)
  79                         ISOBOOT=${x#*=}
  80                 ;;
  81                 # Start Volume manager options
  82                 dolvm)
  83                         USE_LVM_NORMAL=1
  84                 ;;
  85                 dolvm2)
  86                         bad_msg 'Using dolvm2 is deprecated, use dolvm, instead.'
  87                         USE_LVM_NORMAL=1
  88                 ;;
  89                 domdadm)
  90                         USE_MDADM=1
  91                 ;;
  92                 dodmraid)
  93                         USE_DMRAID_NORMAL=1
  94                 ;;
  95                 dodmraid=*)
  96                         DMRAID_OPTS=${x#*=}
  97                         USE_DMRAID_NORMAL=1
  98                 ;;
  99                 dozfs*)
 100                         if [ ! -x /sbin/zfs ]; then
 101                                 USE_ZFS=0
 102                                 bad_msg 'zfs binary not found: aborting use of zfs!'
 103                         else
 104                                 USE_ZFS=1
 105                                 MY_HWOPTS="${MY_HWOPTS} zfs"
 106                                 if [ "${x#*=}" = 'force' ]
 107                                 then
 108                                         ZPOOL_FORCE=-f
 109                                 fi
 110                         fi
 111                 ;;
 112                 # Debug Options
 113                 debug)
 114                         DEBUG='yes'
 115                 ;;
 116                 # Scan delay options
 117                 scandelay=*)
 118                         SDELAY=${x#*=}
 119                 ;;
 120                 scandelay)
 121                         SDELAY=3
 122                 ;;
 123                 # Module no-loads
 124                 doload=*)
 125                         MDOLIST=${x#*=}
 126                         MDOLIST=$(echo ${MDOLIST} | sed -e 's/,/ /g')
 127                 ;;
 128                 nodetect)
 129                         NODETECT=1
 130                 ;;
 131                 noload=*)
 132                         MLIST=${x#*=}
 133                         MLIST="$(echo ${MLIST} | sed -e 's/,/ /g')"
 134                         export MLIST
 135                 ;;
 136                 # Redirect output to a specific tty
 137                 CONSOLE=*|console=*)
 138                         CONSOLE=${x#*=}
 139                         CONSOLE=$(basename ${CONSOLE})
 140 #                       exec >${CONSOLE} <${CONSOLE} 2>&1
 141                 ;;
 142                 # /dev/md
 143                 lvmraid=*)
 144                         RAID_DEVICES="${x#*=}"
 145                         RAID_DEVICES="$(echo ${RAID_DEVICES} | sed -e 's/,/ /g')"
 146                         USE_LVM_NORMAL=1
 147                 ;;
 148                 part=*)
 149                         MDPART=${x#*=}
 150                 ;;
 151                 # NFS
 152                 ip=*)
 153                         IP=${x#*=}
 154                 ;;
 155                 nfsroot=*)
 156                         NFSROOT=${x#*=}
 157                 ;;
 158                 # iSCSI
 159                 iscsi_initiatorname=*)
 160                         ISCSI_INITIATORNAME=${x#*=}
 161                 ;;
 162                 iscsi_target=*)
 163                         ISCSI_TARGET=${x#*=}
 164                 ;;
 165                 iscsi_tgpt=*)
 166                         ISCSI_TGPT=${x#*=}
 167                 ;;
 168                 iscsi_address=*)
 169                         ISCSI_ADDRESS=${x#*=}
 170                 ;;
 171                 iscsi_port=*)
 172                         ISCSI_PORT=${x#*=}
 173                 ;;
 174                 iscsi_username=*)
 175                         ISCSI_USERNAME=${x#*=}
 176                 ;;
 177                 iscsi_password=*)
 178                         ISCSI_PASSWORD=${x#*=}
 179                 ;;
 180                 iscsi_username_in=*)
 181                         ISCSI_USERNAME_IN=${x#*=}
 182                 ;;
 183                 iscsi_password_in=*)
 184                         ISCSI_PASSWORD_IN=${x#*=}
 185                 ;;
 186                 iscsi_debug=*)
 187                         ISCSI_DEBUG=${x#*=}
 188                 ;;
 189                 iscsi_noibft)
 190                         ISCSI_NOIBFT=1
 191                 ;;
 192                 # Crypto
 193                 crypt_root=*)
 194                         CRYPT_ROOT=${x#*=}
 195                 ;;
 196                 crypt_swap=*)
 197                         CRYPT_SWAP=${x#*=}
 198                 ;;
 199                 root_key=*)
 200                         CRYPT_ROOT_KEY=${x#*=}
 201                 ;;
 202                 root_keydev=*)
 203                         CRYPT_ROOT_KEYDEV=${x#*=}
 204                 ;;
 205                 root_trim=*)
 206                         CRYPT_ROOT_TRIM=${x#*=}
 207                 ;;
 208
 209                 swap_key=*)
 210                         CRYPT_SWAP_KEY=${x#*=}
 211                 ;;
 212                 swap_keydev=*)
 213                         CRYPT_SWAP_KEYDEV=${x#*=}
 214                 ;;
 215                 real_resume=*|resume=*)
 216                         REAL_RESUME=${x#*=}
 217                 ;;
 218                 noresume)
 219                         NORESUME=1
 220                 ;;
 221                 crypt_silent)
 222                         CRYPT_SILENT=1
 223                 ;;
 224                 real_rootflags=*)
 225                         REAL_ROOTFLAGS=${x#*=}
 226                 ;;
 227                 rootfstype=*)
 228                         ROOTFSTYPE=${x#*=}
 229                 ;;
 230                 keymap=*)
 231                         keymap=${x#*=}
 232                 ;;
 233                 aufs)
 234                         USE_AUFS_NORMAL=1
 235                 ;;
 236                 unionfs)
 237                         if [ ! -x /sbin/unionfs ]
 238                         then
 239                                 USE_UNIONFS_NORMAL=0
 240                                 bad_msg 'unionfs binary not found: aborting use of unionfs!'
 241                         else
 242                                 USE_UNIONFS_NORMAL=1
 243                         fi
 244                         ;;
 245                 nounionfs)
 246                         USE_UNIONFS_NORMAL=0
 247                         ;;
 248         esac
 249 done
 250
 251 if [ -z "${REAL_ROOT}" -a \( "${CDROOT}" = '0' \)  -a \( "${FAKE_ROOT}" != "/dev/ram0" \) ]
 252 then
 253         REAL_ROOT="${FAKE_ROOT}"
 254 fi
 255
 256 splash 'init'
 257
 258 cmdline_hwopts
 259
 260 # Mount sysfs
 261 mount_sysfs
 262
 263 # Setup hotplugging for firmware loading
 264 setup_hotplug
 265
 266 # Load modules listed in MY_HWOPTS if /lib/modules exists for the running kernel
 267 if [ -z "${DO_modules}" ]
 268 then
 269         good_msg 'Skipping module load; disabled via commandline'
 270 elif [ -d "/lib/modules/${KV}" ]
 271 then
 272         good_msg 'Loading modules'
 273         # Load appropriate kernel modules
 274         if [ "${NODETECT}" != '1' ]
 275         then
 276                 for modules in ${MY_HWOPTS}
 277                 do
 278                         modules_scan ${modules}
 279                 done
 280         fi
 281         # Always eval doload=...
 282         modules_load ${MDOLIST}
 283 else
 284         good_msg 'Skipping module load; no modules in the ramdisk!'
 285 fi
 286
 287 # Apply scan delay if specified
 288 sdelay
 289
 290 # Setup slow USB bits
 291 setup_slowusb
 292
 293 # Start device manager
 294 start_dev_mgr
 295
 296 # if doslowusb is passed, pause other 10 seconds here, after mdev load
 297 [ "${DO_slowusb}" ] && sleep 10
 298
 299 # Start iSCSI
 300 if [ -e /bin/iscsistart ]
 301 then
 302         startiscsi
 303 fi
 304
 305 # Setup btrfs, see bug 303529
 306 setup_btrfsctl
 307
 308 # Setup md device nodes if they dont exist
 309 setup_md_device
 310
 311 # Scan volumes
 312 startVolumes
 313
 314 setup_keymap
 315
 316 # Initialize LUKS root device except for livecd's
 317 if [ "${CDROOT}" != 1 ]
 318 then
 319         startLUKS
 320         if [ "${NORESUME}" != '1' ] && [ -n "${REAL_RESUME}" ]
 321         then
 322                 case "${REAL_RESUME}" in
 323                         LABEL=*|UUID=*)
 324
 325                                 RESUME_DEV=""
 326                                 retval=1
 327
 328                                 if [ ${retval} -ne 0 ]; then
 329                                         RESUME_DEV=$(findfs "${REAL_RESUME}" 2>/dev/null)
 330                                         retval=$?
 331                                 fi
 332
 333                                 if [ ${retval} -ne 0 ]; then
 334                                         RESUME_DEV=$(busybox findfs "${REAL_RESUME}" 2>/dev/null)
 335                                         retval=$?
 336                                 fi
 337
 338                                 if [ ${retval} -ne 0 ]; then
 339                                         RESUME_DEV=$(blkid -l -t "${REAL_RESUME}" | cut -d ":" -f 1 2>/dev/null)
 340                                         retval=$?
 341                                 fi
 342
 343                                 if [ ${retval} -eq 0 ] && [ -n "${RESUME_DEV}" ]; then
 344                                         good_msg "Detected real_resume=${RESUME_DEV}"
 345                                         REAL_RESUME="${RESUME_DEV}"
 346                                 fi
 347                                 ;;
 348                 esac
 349
 350                 do_resume
 351         fi
 352 fi
 353
 354 mkdir -p "${NEW_ROOT}"
 355 CHROOT="${NEW_ROOT}"
 356
 357 # Run debug shell if requested
 358 rundebugshell
 359
 360 if [ "${CDROOT}" = '1' ]
 361 then
 362         good_msg "Making tmpfs for ${NEW_ROOT}"
 363         mount -n -t tmpfs tmpfs "${NEW_ROOT}"
 364
 365         for i in dev mnt mnt/livecd mnt/key tmp tmp/.initrd mnt/gentoo sys
 366         do
 367                 mkdir -p "${NEW_ROOT}/${i}"
 368                 chmod 755 "${NEW_ROOT}/${i}"
 369         done
 370         [ ! -d "${CDROOT_PATH}" ] && mkdir -p "${CDROOT_PATH}"
 371         [ ! -e "${NEW_ROOT}/dev/null" ] && mknod "${NEW_ROOT}"/dev/null c 1 3
 372         [ ! -e "${NEW_ROOT}/dev/console" ] && mknod "${NEW_ROOT}"/dev/console c 5 1
 373
 374         # For SGI LiveCDs ...
 375         if [ "${LOOPTYPE}" = "sgimips" ]
 376         then
 377                 [ ! -e "${NEW_ROOT}/dev/sr0" ] && mknod "${NEW_ROOT}/dev/sr0" b 11 0
 378                 [ ! -e "${NEW_ROOT}/dev/loop0" ] && mknod "${NEW_ROOT}/dev/loop0" b 7 0
 379         fi
 380
 381         # Required for splash to work.  Not an issue with the initrd as this
 382         # device isn't created there and is not needed.
 383         if [ -e /dev/tty1 ]
 384         then
 385                 [ ! -e "${NEW_ROOT}/dev/tty1" ] && mknod "${NEW_ROOT}/dev/tty1" c 4 1
 386         fi
 387
 388         if [ "${REAL_ROOT}" != "/dev/nfs" ] && [ "${LOOPTYPE}" != "sgimips" ]
 389         then
 390                 bootstrapCD
 391         fi
 392
 393         if [ "${REAL_ROOT}" = '' ]
 394         then
 395                 echo -n -e "${WARN}>>${NORMAL}${BOLD} No bootable medium found. Waiting for new devices"
 396
 397                 COUNTER=0
 398                 while [ ${COUNTER} -lt 3 ]; do
 399                         sleep 3
 400                         echo -n '.'
 401                         let COUNTER=${COUNTER}+1
 402                 done
 403
 404                 sleep 1
 405                 echo -e "${NORMAL}"
 406                 bootstrapCD
 407         fi
 408
 409         if [ "${REAL_ROOT}" = '' ]
 410         then
 411                 # Undo stuff
 412                 umount  "${NEW_ROOT}/dev" 2>/dev/null
 413                 umount  "${NEW_ROOT}/sys" 2>/dev/null
 414                 umount /sys 2>/dev/null
 415
 416                 umount  "${NEW_ROOT}"
 417                 rm -rf  "${NEW_ROOT}/*"
 418
 419                 bad_msg 'Could not find CD to boot, something else needed!'
 420                 CDROOT=0
 421         fi
 422 fi
 423
 424 # Determine root device
 425 good_msg 'Determining root device...'
 426 while true
 427 do
 428         while [ "${got_good_root}" != '1' ]
 429         do
 430                 case "${REAL_ROOT}" in
 431                         LABEL=*|UUID=*)
 432
 433                                 ROOT_DEV=""
 434                                 retval=1
 435
 436                                 if [ ${retval} -ne 0 ]; then
 437                                         ROOT_DEV=$(findfs "${REAL_ROOT}" 2>/dev/null)
 438                                         retval=$?
 439                                 fi
 440
 441                                 if [ ${retval} -ne 0 ]; then
 442                                         ROOT_DEV=$(busybox findfs "${REAL_ROOT}" 2>/dev/null)
 443                                         retval=$?
 444                                 fi
 445
 446                                 if [ ${retval} -ne 0 ]; then
 447                                         ROOT_DEV=$(blkid -l -t "${REAL_ROOT}" | cut -d ":" -f 1 2>/dev/null)
 448                                         retval=$?
 449                                 fi
 450
 451                                 if [ ${retval} -eq 0 ] && [ -n "${ROOT_DEV}" ]; then
 452                                         good_msg "Detected real_root=${ROOT_DEV}"
 453                                         REAL_ROOT="${ROOT_DEV}"
 454                                 else
 455                                         prompt_user "REAL_ROOT" "root block device"
 456                                         got_good_root=0
 457                                         continue
 458                                 fi
 459                                 ;;
 460                         ZFS*)
 461                                 ROOT_DEV="${REAL_ROOT#*=}"
 462                                 if [ "${ROOT_DEV}" != 'ZFS' ]
 463                                 then
 464                                         zfs get type ${ROOT_DEV} > /dev/null
 465
 466                                         if [ "$?" = '0' ]
 467                                         then
 468                                                 got_good_root=1;
 469                                                 REAL_ROOT=${ROOT_DEV}
 470                                                 ROOTFSTYPE=zfs
 471                                         fi
 472                                 else
 473                                         BOOTFS=$(/sbin/zpool list -H -o bootfs)
 474                                         if [ "${BOOTFS}" != '-' ]
 475                                         then
 476
 477                                                 for i in ${BOOTFS}
 478                                                 do
 479
 480                                                         zfs get type ${i} > /dev/null
 481                                                         retval=$?
 482
 483                                                         if [ ${retval} -eq 0 ]; then
 484                                                                 got_good_root=1
 485                                                                 REAL_ROOT=${i}
 486                                                                 ROOTFSTYPE=zfs
 487                                                                 break
 488                                                         fi
 489
 490                                                 done;
 491
 492                                         fi
 493
 494                                 fi
 495
 496                                 if [ ${got_good_root} -ne 1 ]; then
 497                                         prompt_user "REAL_ROOT" "root block device"
 498                                         got_good_root=0
 499                                 fi
 500
 501                                 continue
 502                                 ;;
 503                 esac
 504
 505                 if [ "${REAL_ROOT}" = '' ]
 506                 then
 507                         # No REAL_ROOT determined/specified. Prompt user for root block device.
 508                         prompt_user "REAL_ROOT" "root block device"
 509                         got_good_root=0
 510
 511                 # Check for a block device or /dev/nfs
 512                 elif [ -b "${REAL_ROOT}" ] || [ "${REAL_ROOT}" = "/dev/nfs" ]
 513                 then
 514                         got_good_root=1
 515
 516                 else
 517                         bad_msg "Block device ${REAL_ROOT} is not a valid root device..."
 518                         REAL_ROOT=""
 519                         got_good_root=0
 520                 fi
 521         done
 522
 523
 524         if [ "${CDROOT}" = 1 -a "${got_good_root}" = '1' -a "${REAL_ROOT}" != "/dev/nfs" ]
 525         then
 526                 # CD already mounted; no further checks necessary
 527                 break
 528         elif [ "${LOOPTYPE}" = "sgimips" ]
 529         then
 530                 # sgimips mounts the livecd root partition directly
 531                 # there is no isofs filesystem to worry about
 532                 break
 533         else
 534                 good_msg "Mounting $REAL_ROOT as root..."
 535
 536                 if [ "${ROOTFSTYPE}" = 'zfs' ]
 537                 then
 538                         MOUNT_STATE=rw
 539                 else
 540                         MOUNT_STATE=ro
 541                 fi
 542
 543                 # Try to mount the device as ${NEW_ROOT}
 544                 if [ "${REAL_ROOT}" = '/dev/nfs' ]; then
 545                         findnfsmount
 546                 else
 547                         # mount ro so fsck doesn't barf later
 548                         if [ "${REAL_ROOTFLAGS}" = '' ]; then
 549                                 good_msg "Using mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE}"
 550                                 mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE} ${REAL_ROOT} ${NEW_ROOT}
 551                         else
 552                                 good_msg "Using mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE},${REAL_ROOTFLAGS}"
 553                                 mount -t ${ROOTFSTYPE} -o ${MOUNT_STATE},${REAL_ROOTFLAGS} ${REAL_ROOT} ${NEW_ROOT}
 554                         fi
 555                 fi
 556
 557                 # If mount is successful break out of the loop
 558                 # else not a good root and start over.
 559                 if [ "$?" = '0' ]
 560                 then
 561                         if [ -d ${NEW_ROOT}/dev -a -x ${NEW_ROOT}/sbin/init ] || [ "${REAL_ROOT}" = "/dev/nfs" ]
 562                         then
 563                                 break
 564                         else
 565                                 bad_msg "The filesystem mounted at ${REAL_ROOT} does not appear to be a valid /, try again"
 566                                 got_good_root=0
 567                                 REAL_ROOT=''
 568                         fi
 569                 else
 570                         bad_msg "Could not mount specified ROOT, try again"
 571                         got_good_root=0
 572                         REAL_ROOT=''
 573                 fi
 574         fi
 575 done
 576 # End determine root device
 577
 578 #verbose_kmsg
 579
 580 # If CD root is set determine the looptype to boot
 581 if [ "${CDROOT}" = '1' ]
 582 then
 583         good_msg 'Determining looptype ...'
 584         cd "${NEW_ROOT}"
 585
 586         # Find loop and looptype
 587         [ -z "${LOOP}" ] && find_loop
 588         [ -z "${LOOPTYPE}" ] && find_looptype
 589
 590         cache_cd_contents
 591
 592         # If encrypted, find key and mount, otherwise mount as usual
 593         if [ -n "${CRYPT_ROOT}" ]
 594         then
 595                 CRYPT_ROOT_KEY="$(head -n 1 "${CDROOT_PATH}"/livecd)"
 596                 CRYPT_ROOT='/dev/loop0'
 597                 good_msg 'You booted an encrypted livecd' "${CRYPT_SILENT}"
 598
 599                 losetup /dev/loop0 "${CDROOT_PATH}/${LOOPEXT}${LOOP}"
 600                 test_success 'Preparing loop filesystem'
 601
 602                 startLUKS
 603
 604                 case ${LOOPTYPE} in
 605                         normal)
 606                                 MOUNTTYPE="ext2"
 607                                 ;;
 608                         *)
 609                                 MOUNTTYPE="${LOOPTYPE}"
 610                                 ;;
 611                 esac
 612                 mount -t "${MOUNTTYPE}" -o ro /dev/mapper/root "${NEW_ROOT}/mnt/livecd"
 613                 test_success 'Mount filesystem'
 614                 FS_LOCATION='mnt/livecd'
 615         # Setup the loopback mounts, if unencrypted
 616         else
 617                 if [ "${LOOPTYPE}" = 'normal' ]
 618                 then
 619                         good_msg 'Mounting loop filesystem'
 620                         mount -t ext2 -o loop,ro "${CDROOT_PATH}/${LOOPEXT}${LOOP}" "${NEW_ROOT}/mnt/livecd"
 621                         test_success 'Mount filesystem'
 622                         FS_LOCATION='mnt/livecd'
 623                 elif [ "${LOOPTYPE}" = 'squashfs' ]
 624                 then
 625                         if [ "${USE_AUFS_NORMAL}" != '1' ]; then
 626                                 good_msg 'Mounting squashfs filesystem'
 627                                 mount -t squashfs -o loop,ro "${CDROOT_PATH}/${LOOPEXT}${LOOP}" "${NEW_ROOT}/mnt/livecd"
 628                         else
 629                                 good_msg 'Mounting squashfs & aufs filesystems'
 630                                 setup_squashfs_aufs
 631                                 test_success 'Mount filesystem'
 632                         fi
 633                         FS_LOCATION='mnt/livecd'
 634                 elif [ "${LOOPTYPE}" = 'gcloop' ]
 635                 then
 636                         good_msg 'Mounting gcloop filesystem'
 637                         echo ' ' | losetup -E 19 -e ucl-0 -p0 "${NEW_ROOT}/dev/loop0" "${CDROOT_PATH}/${LOOPEXT}${LOOP}"
 638                         test_success 'losetup the loop device'
 639
 640                         mount -t ext2 -o ro "${NEW_ROOT}/dev/loop0" "${NEW_ROOT}/mnt/livecd"
 641                         test_success 'Mount the losetup loop device'
 642                         FS_LOCATION='mnt/livecd'
 643                 elif [ "${LOOPTYPE}" = 'zisofs' ]
 644                 then
 645                         FS_LOCATION="${CDROOT_PATH/\/}/${LOOPEXT}${LOOP}"
 646                 elif [ "${LOOPTYPE}" = 'noloop' ]
 647                 then
 648                         FS_LOCATION="${CDROOT_PATH/\/}"
 649                 elif [ "${LOOPTYPE}" = 'sgimips' ]
 650                 then
 651                         # getdvhoff finds the starting offset (in bytes) of the squashfs
 652                         # partition on the cdrom and returns this offset for losetup
 653                         #
 654                         # All currently supported SGI Systems use SCSI CD-ROMs, so
 655                         # so we know that the CD-ROM is usually going to be /dev/sr0.
 656                         #
 657                         # We use the value given to losetup to set /dev/loop0 to point
 658                         # to the liveCD root partition, and then mount /dev/loop0 as
 659                         # the LiveCD rootfs
 660                         good_msg 'Locating the SGI LiveCD Root Partition'
 661                         echo ' ' | \
 662                                 losetup -o $(getdvhoff "${NEW_ROOT}${REAL_ROOT}" 0) \
 663                                         "${NEW_ROOT}${CDROOT_DEV}" \
 664                                         "${NEW_ROOT}${REAL_ROOT}"
 665                         test_success 'losetup /dev/sr0 /dev/loop0'
 666
 667                         good_msg 'Mounting the Root Partition'
 668                         mount -t squashfs -o ro "${NEW_ROOT}${CDROOT_DEV}" "${NEW_ROOT}/mnt/livecd"
 669                         test_success 'mount /dev/loop0 /'
 670                         FS_LOCATION='mnt/livecd'
 671                 fi
 672         fi
 673
 674
 675
 676         # Unpacking additional packages from NFS mount
 677         # This is useful for adding kernel modules to /lib
 678         # We do this now, so that additional packages can add whereever they want.
 679         if [ "${REAL_ROOT}" = '/dev/nfs' ]
 680         then
 681                 if [ -e "${CDROOT_PATH}/add" ]
 682                 then
 683                                 for targz in $(ls ${CDROOT_PATH}/add/*.tar.gz)
 684                                 do
 685                                         tarname=$(basename ${targz})
 686                                         good_msg "Adding additional package ${tarname}"
 687                                         (cd ${NEW_ROOT} ; /bin/tar -xzf ${targz})
 688                                 done
 689                 fi
 690         fi
 691
 692
 693         if [ "${USE_UNIONFS_NORMAL}" = '1' ]
 694         then
 695                 setup_unionfs ${NEW_ROOT} /${FS_LOCATION}
 696                 CHROOT=/union
 697         elif [ "${USE_AUFS_NORMAL}" != '1' ]; then
 698
 699         good_msg "Copying read-write image contents to tmpfs"
 700         # Copy over stuff that should be writable
 701         (cd "${NEW_ROOT}/${FS_LOCATION}"; cp -a ${ROOT_TREES} "${NEW_ROOT}")
 702
 703         # Now we do the links.
 704         for x in ${ROOT_LINKS}
 705         do
 706                 if [ -L "${NEW_ROOT}/${FS_LOCATION}/${x}" ]
 707                 then
 708                         ln -s "$(readlink ${NEW_ROOT}/${FS_LOCATION}/${x})" "${x}" 2>/dev/null
 709                 else
 710                         # List all subdirectories of x
 711                         find "${NEW_ROOT}/${FS_LOCATION}/${x}" -type d 2>/dev/null | while read directory
 712                         do
 713                                 # Strip the prefix of the FS_LOCATION
 714                                 directory="${directory#${NEW_ROOT}/${FS_LOCATION}/}"
 715
 716                                 # Skip this directory if we already linked a parent directory
 717                                 if [ "${current_parent}" != '' ]; then
 718                                         var=$(echo "${directory}" | grep "^${current_parent}")
 719                                         if [ "${var}" != '' ]; then
 720                                                 continue
 721                                         fi
 722                                 fi
 723                                 # Test if the directory exists already
 724                                 if [ -e "/${NEW_ROOT}/${directory}" ]
 725                                 then
 726                                         # It does exist, link all the individual files
 727                                         for file in $(ls /${NEW_ROOT}/${FS_LOCATION}/${directory})
 728                                         do
 729                                         if [ ! -d "/${NEW_ROOT}/${FS_LOCATION}/${directory}/${file}" ] && [ ! -e "${NEW_ROOT}/${directory}/${file}" ]; then
 730                                                         ln -s "/${FS_LOCATION}/${directory}/${file}" "${directory}/${file}" 2> /dev/null
 731                                                 fi
 732                                         done
 733                                 else
 734                                         # It does not exist, make a link to the livecd
 735                                         ln -s "/${FS_LOCATION}/${directory}" "${directory}" 2>/dev/null
 736                                         current_parent="${directory}"
 737                                 fi
 738                         done
 739                 fi
 740         done
 741
 742         mkdir initramfs proc tmp sys 2>/dev/null
 743         chmod 1777 tmp
 744
 745         fi
 746
 747         #UML=$(cat /proc/cpuinfo|grep UML|sed -e 's|model name.*: ||')
 748         #if [ "${UML}" = 'UML' ]
 749         #then
 750         #       # UML Fixes
 751         #       good_msg 'Updating for uml system'
 752         #fi
 753
 754         # Let Init scripts know that we booted from CD
 755         export CDBOOT
 756         CDBOOT=1
 757 else
 758         if [ "${USE_UNIONFS_NORMAL}" = '1' ]
 759         then
 760                 mkdir /union_changes
 761                 mount -t tmpfs tmpfs /union_changes
 762                 setup_unionfs /union_changes ${NEW_ROOT}
 763                 mkdir -p ${UNION}/tmp/.initrd
 764         fi
 765 fi
 766
 767 # Mount the additional things as required by udev & systemd
 768 if [ -f ${NEW_ROOT}/etc/initramfs.mounts ]; then
 769         fslist=$(get_mounts_list)
 770 else
 771         # Disabled until the new OpenRC is ready to go.
 772         # Otherwise users will get /usr mounted RO, and it will NOT transition to
 773         # RW correctly.
 774         #fslist="/usr"
 775         fslist=""
 776 fi
 777
 778 for fs in $fslist; do
 779         dev=$(get_mount_device $fs)
 780         # In this case, it's probably part of the filesystem
 781         # and not a mountpoint
 782         [ -z "$dev" ] && continue
 783         fstype=$(get_mount_fstype $fs)
 784         # ro must be trailing, and the options will always contain at least 'defaults'
 785         opts="$(get_mount_options $fs | strip_mount_options),ro"
 786         mnt=${NEW_ROOT}${fs}
 787         cmd="mount -t $fstype -o $opts $dev $mnt"
 788         good_msg "Mounting $dev as ${fs}: $cmd"
 789         if ! $cmd; then
 790                 bad_msg "Unable to mount $dev for $fs"
 791         fi
 792 done
 793
 794 # Execute script on the cdrom just before boot to update things if necessary
 795 cdupdate
 796
 797 if [ "${SUBDIR}" != '' -a -e "${CHROOT}/${SUBDIR}" ]
 798 then
 799         good_msg "Entering ${SUBDIR} to boot"
 800         CHROOT="${CHROOT}/${SUBDIR}"
 801 fi
 802
 803 verbose_kmsg
 804
 805 echo -ne "${GOOD}>>${NORMAL}${BOLD} Booting (initramfs)${NORMAL}"
 806
 807 cd "${CHROOT}"
 808 mkdir "${CHROOT}/proc" "${CHROOT}/sys" 2>/dev/null
 809 echo -ne "${BOLD}.${NORMAL}"
 810
 811 # If devtmpfs is mounted, try move it to the new root
 812 # If that fails, try to unmount all possible mounts of devtmpfs as stuff breaks otherwise
 813 for fs in /dev /sys /proc
 814 do
 815         if grep -qs "$fs" /proc/mounts
 816         then
 817                 if ! mount --move $fs "${CHROOT}"$fs
 818                 then
 819                         umount $fs || echo '*: Failed to move and unmount the ramdisk $fs!'
 820                 fi
 821         fi
 822 done
 823
 824 if [ ! -e "${CHROOT}/dev/console" ] || [ ! -e "${CHROOT}/dev/null" ]
 825 then
 826         echo -ne "${BAD}>>${NORMAL}${BOLD} ERROR: your real /dev is missing files required to boot (console and null)${NORMAL}"
 827 elif [ -e /etc/initrd.splash -a ! -e "${CHROOT}/dev/tty1" ]
 828 then
 829         echo -ne "${BAD}>>${NORMAL}${BOLD} ERROR: your real /dev is missing tty1, which is required for splash${NORMAL}"
 830 fi
 831
 832 echo -e "${BOLD}.${NORMAL}"
 833
 834 exec /sbin/switch_root -c "/dev/console" "${CHROOT}" "${REAL_INIT:-/sbin/init}" "${INIT_OPTS}"
 835
 836 # If we get here, something bad has happened
 837 splash 'verbose'
 838
 839 echo "A fatal error has probably occured since ${REAL_INIT:-/sbin/init} did not"
 840 echo "boot correctly. Trying to open a shell..."
 841 echo
 842 exec /bin/bash
 843 exec /bin/sh
 844 exec /bin/ash
 845 exec /bin/dash
 846 exec sh