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11. Appendix D. - obsolete linuxrc and shutdown scripts

11.1 Obsolete working - linuxrc

This linuxrc file works fine with the shutdown procedure in the next subsection.

 ---------------------- linuxrc --------------------
#!/bin/sh
# ver 1.07 2-12-98
# linuxrc - for raid1 using small dos partition and loadlin
#

# mount the proc file system
/bin/mount /proc

# This may vary for your system.
# Mount the dos partitions, try both
# in case one disk is dead
/bin/mount /dosa
/bin/mount /dosc

# Set a flag in case the raid status file is not found
# then check both drives for the status file
RAIDOWN="raidstat.ro not found"
/bin/echo "Reading md0 shutdown status."
if [ -f /dosa/raidboot/raidstat.ro ]; then
  RAIDOWN=`/bin/cat /dosa/raidboot/raidstat.ro`
  RAIDREF=`/bin/cat /dosc/raidboot/raidgood.ref`
else
  if [ -f /dosc/raidboot/raidstat.ro ]; then
    RAIDOWN=`/bin/cat /dosc/raidboot/raidstat.ro`
    RAIDREF=`/bin/cat /dosc/raidboot/raidgood.ref`
  fi
fi

# Test for a clean shutdown with all disks operational
if [ "${RAIDOWN} != ${RAIDREF}" ]; then
  echo "ERROR ${RAIDOWN}"
#  Use the next 2 lines to BAIL OUT and leave rescue running
   /bin/echo 0x100>/proc/sys/kernel/real-root-dev
   exit                 # leaving the error files in dosa/raidboot,etc...
fi

# The raid array is clean, proceed by removing
# status file and writing a clean superblock
/bin/rm /dosa/raidboot/raidstat.ro
/bin/rm /dosc/raidboot/raidstat.ro
/sbin/mkraid /etc/raid1.conf -f --only-superblock

/bin/umount /dosa
/bin/umount /dosc

# Mount raid array
echo "Mounting md0, root filesystem"
/sbin/mdadd -ar

#  If there are errors - BAIL OUT and leave rescue running
if [ $? -ne 0 ]; then
   echo "RAID device has errors"
#  Use the next 3 lines to BAIL OUT
   /bin/rm /etc/mtab            # remove bad mtab
   /bin/echo 0x100>/proc/sys/kernel/real-root-dev
   exit
fi

# else tell the kernel to switch to /dev/md0 as the /root device
# The 0x900 value the device number calculated by:
#  256*major_device_number + minor_device number
/bin/echo 0x900>/proc/sys/kernel/real-root-dev

# umount /proc to deallocate initrd device ram space
/bin/umount /proc
/bin/echo "/dev/md0 mounted as root"
exit
#------------------ end linuxrc ----------------------

11.2 Obsolete working - shutdown scripts

This shutdown procedure works fine with the preceeding linuxrc

To capture the raid array shutdown status, just before the file systems are dismounted insert:

        RAIDSTATUS=`/bin/cat /proc/mdstat | /usr/bin/grep md0`

After all the file systems are dismounted (the root file system 'will not' dismount) add:

        # root device remains mounted RO
        # mount dos file systems RW
        mount -n -o remount,ro /
        echo "Writing RAID read-only boot FLAG(s)."
        mount -n /dosa
        mount -n /dosc
        # create raid mounted RO flag in duplicate
        # containing the shutdown status of the raid array
        echo ${RAIDSTATUS} > /dosa/raidboot/raidstat.ro
        echo ${RAIDSTATUS} > /dosc/raidboot/raidstat.ro

        umount -n /dosa
        umount -n /dosc

        # Stop all the raid arrays (except root)
        echo "Stopping raid"
        mdstop -a

This will cleanly stop all raid devices except root. Root status is passed to the next boot in raidstat.ro.

The complete shutdown script from my old raid1 Slackware system follows, I have switched raid1 to the new procedure with the /etc/raidboot.conf file.

#! /bin/sh
#
# rc.6          This file is executed by init when it goes into runlevel
#               0 (halt) or runlevel 6 (reboot). It kills all processes,
#               unmounts file systems and then either halts or reboots.
#
# Version:      @(#)/etc/rc.d/rc.6      1.50    1994-01-15
#
# Author:       Miquel van Smoorenburg <miquels@drinkel.nl.mugnet.org>
# Modified by:  Patrick J. Volkerding, <volkerdi@ftp.cdrom.com>
# Modified by:  Michael A. Robinton, <michael@bzs.org> for RAID shutdown

  # Set the path.
  PATH=/sbin:/etc:/bin:/usr/bin

  # Set linefeed mode to avoid staircase effect.
  stty onlcr

  echo "Running shutdown script $0:"

  # Find out how we were called.
  case "$0" in
        *0)
                message="The system is halted."
                command="halt"
                ;;
        *6)
                message="Rebooting."
                command=reboot
                ;;
        *)
                echo "$0: call me as \"rc.0\" or \"rc.6\" please!"
                exit 1
                ;;
  esac

  # Kill all processes.
  # INIT is supposed to handle this entirely now, but this didn't always
  # work correctly without this second pass at killing off the processes.
  # Since INIT already notified the user that processes were being killed,
  # we'll avoid echoing this info this time around.
  if [ "$1" != "fast" ]; then # shutdown did not already kill all processes
    killall5 -15 
    killall5 -9
  fi

  # Try to turn off quota and accounting.
  if [ -x /usr/sbin/quotaoff ]
  then
        echo "Turning off quota."
        /usr/sbin/quotaoff -a
  fi
  if [ -x /sbin/accton ]
  then
        echo "Turning off accounting."
        /sbin/accton
  fi

  # Before unmounting file systems write a reboot or halt record to wtmp.
  $command -w

  # Save localtime
  [ -e /usr/lib/zoneinfo/localtime ] && cp /usr/lib/zoneinfo/localtime /etc

  # Asynchronously unmount any remote filesystems:
  echo "Unmounting remote filesystems."
  umount -a -tnfs &

  # you must have issued
  # 'cat /proc/mdstat | grep md0 > {your boot vol}/raidboot/raidgood.ref'  
  # before linuxrc will execute properly with this info
  RAIDSTATUS=`/bin/cat /proc/mdstat | /usr/bin/grep md0 # capture raid status`

  # Turn off swap, then unmount local file systems.
  # clearing mdtab as well
  echo "Turning off swap."
  swapoff -a
  echo "Unmounting local file systems."
  umount -a -tnonfs

  # Don't remount UMSDOS root volumes:
  if [ ! "`mount | head -1 | cut -d ' ' -f 5`" = "umsdos" ]; then
    mount -n -o remount,ro /
  fi

  # root device remains mounted
  # mount dos file systems RW
  echo "Writing RAID read-only boot FLAG(s)."
  mount -n /dosa
  mount -n /dosc
  # create raid mounted RO flag in duplicate
  # containing the shutdown status of the raid array
  echo ${RAIDSTATUS} > /dosa/raidboot/raidstat.ro
  echo ${RAIDSTATUS} > /dosc/raidboot/raidstat.ro

  umount -n /dosa
  umount -n /dosc

  # Stop all the raid arrays (except root)
  echo "Stopping raid"
  mdstop -a

  # See if this is a powerfail situation.
  if [ -f /etc/power_is_failing ]; then
    echo "Turning off UPS, bye."
    /sbin/powerd -q
    exit 1
  fi

  # Now halt or reboot.
  echo "$message"
  [ ! -f /etc/fastboot ] && echo "On the next boot fsck will be FORCED."
  $command -f

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