nagios-scripts/check-dummy.sh

#!/bin/bash

#
#/
#/ Usage:
#/ check-dummy.sh [--ok|--warning|--critical]
#/
#/ Does not check anything.
#/
#/ Options:
#/  -o, --ok           Trigger a OK status (default)
#/  -w, --warning      Trigger a warning
#/  -c, --critical     Trigger a critical warning
#/  -u, --unknown      Trigger a unknown status
#/ 
#/ 
#/ Exit Codes:
#/  0 Everything OK
#/  1 Warning level exceeded
#/  2 Critical level exceeded
#/  3 Unknown status
#/

Usage() {
    grep '^#/' "${script_dir}/${script_name}" | sed 's/^#\/\w*//'
}

GetOptions() {
    # https://stackoverflow.com/a/29754866
    OPTIONS='owcu'
    LONGOPTS='ok,warning,critical,unknown'

    # -use ! and PIPESTATUS to get exit code with errexit set
    # -temporarily store output to be able to check for errors
    # -activate quoting/enhanced mode (e.g. by writing out “--options”)
    # -pass arguments only via   -- "$@"   to separate them correctly
    ! PARSED=$(getopt --options=$OPTIONS --longoptions=$LONGOPTS --name "$0" -- "$@")
    if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
        # e.g. return value is 1
        #  then getopt has complained about wrong arguments to stdout
        Usage
    fi

    # read getopt's output this way to handle the quoting right:
    eval set -- "$PARSED"

    # now enjoy the options in order and nicely split until we see --
    while true; do
        case "$1" in
            -o|--ok)
                rval=0
                rmsg="OK"
                shift
                ;;
            -w|--warning)
                rval=1
                rmsg="WARNING"
                shift
                ;;
            -c|--critical)
                rval=2
                rmsg="CRITICAL"
                shift
                ;;
            -u|--unknown)
                rval=3
                rmsg="UNKNOWN"
                shift
                ;;
            --)
                shift
                break
                ;;
            *)
                echo "DUMMY UNKNOWN - ${1} is not a valid parameter"
                exit 3
                ;;
        esac
    done
}
script_name=$(basename "${0}")
script_dir=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
rval=0
rmsg="OK"
GetOptions "$@"

echo "DUMMY $rmsg"
exit $rval