description "unmounts normal MyDocs filesystem and replaces it with the SD card"

# Runs afer rcS-late has mounted everything
start on MOUNTS_OK

console none

script

        MYDOCS_DEVICE=/dev/mmcblk0p1
        SD_DEVICE=/dev/mmcblk1p1
        MYDOCS_MOUNTPOINT=/home/user/MyDocs
        MYDOCS_FILESYSTEM=vfat
        SD_MOUNTPOINT=/media/mmc1
        SD_FILESYSTEM=ext3

        # Check that MyDocs hasn't already been replaced
        if [ ! -z "`mount | grep $MYDOCS_MOUNTPOINT | grep $SD_DEVICE`" ]
        then
                # Already mounted.
                normal exit 0
        fi
        # It can take a few seconds for MyDocs to actually mount after rsS-late
        # has finished, so we'll watch for it
        i=0
        if [ $SD_FILESYSTEM == "vfat" ]
        then
               # The SD will auto-mount if if's vfat, but won't otherwise. So if it's vfat
               # we want to wait until it's been mounted so we don't interrupt
                while [ "`mount | grep $SD_MOUNTPOINT`" ]
                do
                        i=$(($i+1))
                        if [ $i -eq 120 ]
                        then
                                # If it hasn't mounted within two minutes, something's gone
                                # horribly wrong, so we may as well give up
                                normal exit 0
                        fi
                        sleep 1
                done
        fi
        i=0
        while [ -z "`mount | grep $MYDOCS_MOUNTPOINT`" ]
        do
                i=$(($i+1))
                if [ $i -eq 120 ]
                then
                        # If it hasn't mounted within two minutes, something's gone
                        # horribly wrong, so we may as well give up
                        normal exit 0
                fi
                sleep 1
        done
        if [ $SD_FILESYSTEM == "vfat" ]
        then
                # Get mount options from the fstab file
                OPTS=`grep $MYDOCS_MOUNTPOINT /etc/fstab | awk ' { print $4 } '`
        else
                # We don't want the mount options from fstab, as some are invalid for
                # other filesystems.
                OPTS="noauto,nodev,nosuid,noatime,nodiratime"
        fi

        if [ $SD_FILESYSTEM == "vfat" ]
        then
                # Unmount the SD card
                umount $SD_MOUNTPOINT
                # Check it unmouted OK
                if [ $? -ne 0 ]
                then
                        exit
                fi
        fi
        # Unmount the MyDocs filesystem
        umount $MYDOCS_MOUNTPOINT
        # Check it unmounted OK
        if [ $? -eq 0 ]
        then
                # Mount the SD on MyDocs
                mount $SD_DEVICE -t $SD_FILESYSTEM -o "$OPTS" $MYDOCS_MOUNTPOINT
                if [ $? -ne 0 ]
                then
                        # Failed to mount the SD so fall back to original
                        mount $MYDOCS_DEVICE -t $MYDOCS_FILESYSTEM -o "$OPTS" $MYDOCS_MOUNTPOINT
                else
                        initctl emit MYDOCS_REPLACED
                fi
        fi

end script
normal exit 0