packages/initscripts/initscripts-1.0/mtx-2/checkroot.sh

   1 #
   2 # checkroot.sh  Check to root filesystem.
   3 #
   4 # Version:      @(#)checkroot.sh  2.84  25-Jan-2002  miquels@cistron.nl
   5 #
   6
   7 . /etc/default/rcS
   8
   9 #
  10 # Set SULOGIN in /etc/default/rcS to yes if you want a sulogin to be spawned
  11 # from this script *before anything else* with a timeout, like SCO does.
  12 #
  13 test "$SULOGIN" = yes && sulogin -t 30 $CONSOLE
  14
  15 #
  16 # Ensure that bdflush (update) is running before any major I/O is
  17 # performed (the following fsck is a good example of such activity :).
  18 #
  19 test -x /sbin/update && update
  20
  21 #
  22 # Read /etc/fstab.
  23 #
  24 exec 9>&0 </etc/fstab
  25 rootmode=rw
  26 rootopts=rw
  27 rootcheck=no
  28 swap_on_md=no
  29 devfs=
  30 while read fs mnt type opts dump pass junk
  31 do
  32         case "$fs" in
  33                 ""|\#*)
  34                         continue;
  35                         ;;
  36                 /dev/md*)
  37                         # Swap on md device.
  38                         test "$type" = swap && swap_on_md=yes
  39                         ;;
  40                 /dev/*)
  41                         ;;
  42                 *)
  43                         # Might be a swapfile.
  44                         test "$type" = swap && swap_on_md=yes
  45                         ;;
  46         esac
  47         test "$type" = devfs && devfs="$fs"
  48         test "$mnt" != / && continue
  49         rootopts="$opts"
  50         test "$pass" = 0 -o "$pass" = "" && rootcheck=no
  51         case "$opts" in
  52                 ro|ro,*|*,ro|*,ro,*)
  53                         rootmode=ro
  54                         ;;
  55         esac
  56 done
  57 exec 0>&9 9>&-
  58
  59 #
  60 # Activate the swap device(s) in /etc/fstab. This needs to be done
  61 # before fsck, since fsck can be quite memory-hungry.
  62 #
  63 doswap=no
  64 test -d /proc/1 || mount -n /proc
  65 case "`uname -r`" in
  66         2.[0123].*)
  67                 if test $swap_on_md = yes && grep -qs resync /proc/mdstat
  68                 then
  69                         test "$VERBOSE" != no && echo "Not activating swap - RAID array resyncing"
  70                 else
  71                         doswap=yes
  72                 fi
  73                 ;;
  74         *)
  75                 doswap=yes
  76                 ;;
  77 esac
  78 if test $doswap = yes
  79 then
  80         test "$VERBOSE" != no && echo "Activating swap"
  81         swapon -a 2> /dev/null
  82 fi
  83
  84 #
  85 # Check the root filesystem.
  86 #
  87 if test -f /fastboot || test $rootcheck = no
  88 then
  89   test $rootcheck = yes && echo "Fast boot, no filesystem check"
  90 else
  91   #
  92   # Ensure that root is quiescent and read-only before fsck'ing.
  93   #
  94   mount -n -o remount,ro /
  95   if test $? = 0
  96   then
  97     if test -f /forcefsck
  98     then
  99         force="-f"
 100     else
 101         force=""
 102     fi
 103     if test "$FSCKFIX" = yes
 104     then
 105         fix="-y"
 106     else
 107         fix="-a"
 108     fi
 109     spinner="-C"
 110     case "$TERM" in
 111         dumb|network|unknown|"") spinner="" ;;
 112     esac
 113     test `uname -m` = s390 && spinner="" # This should go away
 114     test "$VERBOSE" != no && echo "Checking root filesystem..."
 115     fsck $spinner $force $fix /
 116     #
 117     # If there was a failure, drop into single-user mode.
 118     #
 119     # NOTE: "failure" is defined as exiting with a return code of
 120     # 2 or larger.  A return code of 1 indicates that filesystem
 121     # errors were corrected but that the boot may proceed.
 122     #
 123     if test "$?" -gt 1
 124     then
 125       # Surprise! Re-directing from a HERE document (as in
 126       # "cat << EOF") won't work, because the root is read-only.
 127       echo
 128       echo "fsck failed.  Please repair manually and reboot.  Please note"
 129       echo "that the root filesystem is currently mounted read-only.  To"
 130       echo "remount it read-write:"
 131       echo
 132       echo "   # mount -n -o remount,rw /"
 133       echo
 134       echo "CONTROL-D will exit from this shell and REBOOT the system."
 135       echo
 136       # Start a single user shell on the console
 137       /sbin/sulogin $CONSOLE
 138       reboot -f
 139     fi
 140   else
 141     echo "*** ERROR!  Cannot fsck root fs because it is not mounted read-only!"
 142     echo
 143   fi
 144 fi
 145
 146 #
 147 #       If the root filesystem was not marked as read-only in /etc/fstab,
 148 #       remount the rootfs rw but do not try to change mtab because it
 149 #       is on a ro fs until the remount succeeded. Then clean up old mtabs
 150 #       and finally write the new mtab.
 151 #       This part is only needed if the rootfs was mounted ro.
 152 #
 153 echo "Remounting root file system..."
 154 mount -n -o remount,$rootmode /
 155 if test "$rootmode" = rw
 156 then
 157         if test ! -L /etc/mtab
 158         then
 159                 rm -f /etc/mtab~ /etc/nologin
 160                 : > /etc/mtab
 161         fi
 162         mount -f -o remount /
 163         mount -f /proc
 164         test "$devfs" && grep -q '^devfs /dev' /proc/mounts && mount -f "$devfs"
 165 fi
 166
 167 : exit 0