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|
#
# checkroot.sh Check to root filesystem.
#
# Version: @(#)checkroot.sh 2.84 25-Jan-2002 miquels@cistron.nl
#
. /etc/default/rcS
#
# Set SULOGIN in /etc/default/rcS to yes if you want a sulogin to be spawned
# from this script *before anything else* with a timeout, like SCO does.
#
test "$SULOGIN" = yes && sulogin -t 30 $CONSOLE
#
# Ensure that bdflush (update) is running before any major I/O is
# performed (the following fsck is a good example of such activity :).
#
test -x /sbin/update && update
#
# Read /etc/fstab.
#
exec 9>&0 </etc/fstab
rootmode=rw
rootopts=rw
test "$ENABLE_ROOTFS_FSCK" = yes && rootcheck="yes" || rootcheck="no"
swap_on_md=no
devfs=
while read fs mnt type opts dump pass junk
do
case "$fs" in
""|\#*)
continue;
;;
/dev/md*)
# Swap on md device.
test "$type" = swap && swap_on_md=yes
;;
/dev/*)
;;
*)
# Might be a swapfile.
test "$type" = swap && swap_on_md=yes
;;
esac
test "$type" = devfs && devfs="$fs"
# Currently we do not care about the other entries
if test "$mnt" = "/"
then
#echo "[$fs] [$mnt] [$type] [$opts] [$dump] [$pass] [$junk]"
rootopts="$opts"
roottype="$type"
#The "spinner" is broken on busybox sh
TERM=dumb
test "$pass" = 0 -o "$pass" = "" && rootcheck=no
# Allow fsck for ext2 and ext3 rootfs, disable for everything else
case "$type" in
ext2|ext3) ;;
*) rootcheck=no;;
esac
if test "$rootcheck" = yes
then
if ! test -x "/sbin/fsck.${roottype}"
then
echo -e "\n * * * WARNING: /sbin/fsck.${roottype} is missing! * * *\n"
rootcheck=no
fi
fi
case "$opts" in
ro|ro,*|*,ro|*,ro,*)
rootmode=ro
;;
esac
fi
done
exec 0>&9 9>&-
#
# Activate the swap device(s) in /etc/fstab. This needs to be done
# before fsck, since fsck can be quite memory-hungry.
#
doswap=no
test -d /proc/1 || mount -n /proc
case "`uname -r`" in
2.[0123].*)
if test $swap_on_md = yes && grep -qs resync /proc/mdstat
then
test "$VERBOSE" != no && echo "Not activating swap - RAID array resyncing"
else
doswap=yes
fi
;;
*)
doswap=yes
;;
esac
if test $doswap = yes
then
test "$VERBOSE" != no && echo "Activating swap"
swapon -a 2> /dev/null
fi
#
# Check the root filesystem.
#
if test -f /fastboot || test $rootcheck = no
then
test $rootcheck = yes && echo "Fast boot, no filesystem check"
else
#
# Ensure that root is quiescent and read-only before fsck'ing.
#
mount -n -o remount,ro /
if test $? = 0
then
if test -f /forcefsck
then
force="-f"
else
force=""
fi
if test "$FSCKFIX" = yes
then
fix="-y"
else
fix="-a"
fi
spinner="-C"
case "$TERM" in
dumb|network|unknown|"") spinner="" ;;
esac
test `uname -m` = s390 && spinner="" # This should go away
test "$VERBOSE" != no && echo "Checking root filesystem..."
fsck $spinner $force $fix /
RTC=$?
#
# If there was a failure, drop into single-user mode.
#
# NOTE: "failure" is defined as exiting with a return code of
# 2 or larger. A return code of 1 indicates that filesystem
# errors were corrected but that the boot may proceed.
#
echo "RETURNCODE: [$RTC]"
if test "$RTC" -gt 3
then
# Since this script is run very early in the boot-process, it should be safe to assume that the
# output is printed to VT1. However, some distributions use a bootsplash to hide the "ugly" boot
# messages and having the bootsplash "hang" due to a waiting fsck prompt is less than ideal
chvt 1
# Surprise! Re-directing from a HERE document (as in
# "cat << EOF") won't work, because the root is read-only.
echo
echo "fsck failed. Please repair manually and reboot. "
echo "Please note that the root filesystem is currently "
echo "mounted read-only. To remount it read-write:"
echo
echo " # mount -n -o remount,rw /"
echo
echo "CONTROL-D will exit from this shell"
echo "and REBOOT the system."
echo
# Start a single user shell on the console
/sbin/sulogin $CONSOLE
reboot -f
fi
else
echo "*** ERROR! Cannot fsck root fs because it is not mounted read-only!"
echo
fi
fi
#
# If the root filesystem was not marked as read-only in /etc/fstab,
# remount the rootfs rw but do not try to change mtab because it
# is on a ro fs until the remount succeeded. Then clean up old mtabs
# and finally write the new mtab.
# This part is only needed if the rootfs was mounted ro.
#
ROOTFSDEV="/dev/root"
if ! grep -q "^$ROOTFSDEV\w" /proc/mounts; then
ROOTFSDEV="rootfs"
fi
if [ x$(grep "^$ROOTFSDEV\w" /proc/mounts | awk '{print $4}') = "xrw" ]; then
echo "Root filesystem already read-write, not remounting"
exit 0
fi
echo "Remounting root file system..."
mount -n -o remount,$rootmode /
if test "$rootmode" = rw
then
if test ! -L /etc/mtab
then
rm -f /etc/mtab~ /etc/nologin
: > /etc/mtab
fi
mount -f -o remount /
mount -f /proc
test "$devfs" && grep -q '^devfs /dev' /proc/mounts && mount -f "$devfs"
fi
: exit 0
|
