#!/bin/bash
#
# Nagios plugin to check if mounted devices are rw
#
STATE_OK=0
STATE_CRITICAL=2

for i in `grep ' ro,' /proc/mounts | awk '{ print $2 }'`
do
        OUTPUT=$(grep ' $i ' /etc/fstab | awk '{ print $4 }' | grep 'ro' 2>/dev/null)
        if [ $i == 0 ]; then
                MESSAGE="$i $MESSAGE";
        fi
done

if [ "$MESSAGE" ]
then
        echo "CRITICAL: Read-only filesystem: $MESSAGE"
        exit $STATE_CRITICAL
fi

echo "No Read-Only filesystems"
exit $STATE_OK