lfs-book/chapter07/checkfs.xml

<sect1 id="ch07-checkfs">
<title>Creating the checkfs script</title>

<para>
A new file <filename>/etc/init.d/checkfs</filename> is created containing
the following:
</para>

<para>
<screen>
<userinput>cat &gt; checkfs &lt;&lt; "EOF"</userinput>
#!/bin/sh
# Begin /etc/init.d/checkfs

#
# Include the functions declared in the /etc/init.d/functions file
#

source /etc/init.d/functions

#
# Activate all the swap partitions declared in the /etc/fstab file
#

echo -n "Activating swap..."
/sbin/swapon -a
evaluate_retval

#
# If the /fastboot file exists we don't want to run the partition checks
#

if [ -f /fastboot ]
then
        echo "Fast boot, no file system check"
else

#
# Mount the root partition read-only (just in case the kernel mounts it
# read-write and we don't want to run fsck on a read-write mounted 
# partition).
#

        /bin/mount -n -o remount,ro /
        if [ $? = 0 ]
        then

#
# If the /forcefsck file exists we want to force a partition check even 
# if the partition was unmounted cleanly the last time
#

                if [ -f /forcefsck ]
                then
                        echo -n "/forcefsck exists, forcing "
                        echo "file system check"
                        force="-f"
                else
                        force=""
                fi

#
# Check all the file systems mentioned in /etc/fstab that have the
# fs_passno value set to 1 or 2 (the 6th field. See man fstab for more
# info)
#

                echo "Checking file systems..."
                /sbin/fsck $force -a -A -C -T

#
# If something went wrong during the checks of one of the partitions,
# fsck will exit with a return value greater than 1. If this is
# the case we start sulogin so you can repair the damage manually
#

                if [ $? -gt 1 ]
                then
                        $FAILURE
                        echo
                        echo -n "fsck failed. Please repair your file "
                        echo "systems manually by running /sbin/fsck"
                        echo "without the -a option"
                        echo
                        echo -n "Please note that the root file system " 
                        echo "is currently mounted in read-only mode."
                        echo
                        echo -n "I will start sulogin now. When you  "
                        echo "logout I will reboot your system."
                        echo
                        $NORMAL
                        /sbin/sulogin
                        /sbin/reboot -f
                else
                        print_status success
                fi

        else

#
# If the remount to read-only mode didn't work abort the fsck and print
# an error
#

                echo -n "Cannot check root file system because it "
                echo "could not be mounted in read-only mode."
        fi
fi

# End /etc/init.d/checkfs
<userinput>EOF</userinput>
</screen>
</para>

</sect1>