icinga2-checks/check_not_writable.sh

#!/bin/bash

# Default exit code for Nagios
STATE_OK=0
STATE_WARNING=1
STATE_CRITICAL=2
STATE_UNKNOWN=3

# Parse command line options
while getopts "p:" OPTION
do
    case $OPTION in
        p)
            path=$OPTARG
            ;;
        *)
            echo "Usage: $0 -p <path>"
            exit $STATE_UNKNOWN
            ;;
    esac
done

# Check if path is set
if [ -z "$path" ]; then
    echo "No path specified"
    echo "./check_not_writable.sh -p [directory to check]"
    exit $STATE_UNKNOWN
fi

# Check if directory exists
if [ ! -d "$path" ]; then
    echo "UNKNOWN - $path is not a directory"
    exit 3
fi

# Check if directory is writable
if [ ! -w "$path" ]; then
    echo "OK - $path is not writable"
    exit $STATE_OK
else
    echo "CRITICAL - $path is writable"
    exit 2
fi