check_mount

#!/bin/bash

# Written by filip@ilibris.be
# 2011-05-04
#
# Nagios plugin that checks if a certain mount is really mounted and writable

#Bugfix: for some reason "cat /dev/urandom" takes ages on a precise machine, so limit the working set asap
#STRING=`cat /dev/urandom| tr -dc 'a-zA-Z' | fold -w 25 | head -n1`
STRING=`head -n8 /dev/urandom| tr -dc 'a-zA-Z' | fold -w 25 | head -n1`

if [ $# -eq "2" ]; then

        CHECK=`awk '$2 == var' var=$1 /proc/mounts`
        MOUNTPOINT=`echo $CHECK | cut -d' ' -f2`
        MOUNTTYPE=`echo $CHECK | cut -d' ' -f3`

        if [ "$MOUNTPOINT" == "$1" ]; then

		if [ "$2" == "all" ]; then
			echo -e "OK - $1 is mounted with type $MOUNTTYPE"
			exit 0
                elif [ "$MOUNTTYPE" == "$2" ]; then
                       cd $1 && touch $STRING
                        if [ $? -eq 0 ]; then
                                echo -e "OK - $1 is mounted with type $MOUNTTYPE and is writable"
                                rm $STRING
                                exit 0
                        else
                                echo -e "WARNING - $1 is mounted with type $MOUNTTYPE but is not writable"
                                exit 1
                        fi
                else
                        echo -e "WARNING - $1 is mounted but with incorrect type ($MOUNTTYPE)"
                        exit 1
                fi

        else
                echo -e "CRITICAL - $1 isn't mounted"
                # try to mount as silent as possible
                mount $1 2> /dev/null
                exit 2
        fi

else
        echo "USAGE: $0 <mount point> <fstype>"
	echo "Use <fstype> 'all' if the type doesn't matter - not checked if writable"
        exit 1
fi