#!/bin/bash

path=""
while test $# -gt 0; do
    case $1 in
        (-h|--help) cat <<EOF
$0 [OPTIONS] PATH

  -h, --help                show this help

PATH

Path to check.

DESCRIPTION

Icinga plugin to check whether a given path is available. Detects
problems, e.g. with glusterfs: In case of a problem, there is an error
message such as "socket not connected".

EOF
                    exit;;
        (*) if test $# -ne 1; then
                echo "ERROR: please specify an existing path, not $*" 1>&2
                exit 1
            fi
            path="$1";;
    esac
    if test $# -lt 1; then
        echo "ERROR: missing option, try $0 --help"
        exit 1
    fi
    shift
done
if ! test -d "$path"; then
    echo "ERROR: no such path $path" 1>&2
    exit 1
fi
time=$(mktemp)
out=$(mktemp)
err=$(mktemp)
if /usr/bin/time -f "elapsed=%es" -qo $time mount | grep -q 'on '"$path"' '; then
    if /usr/bin/time -f "elapsed=%es" -qo $time ls "$path" > $out 2> $err && test -s $out; then
        if [[ $(<$time) =~ elapsed=0.0[012]s ]]; then
            level=0
            STATUS="OK - ${path}:"
        else
            level=1
            STATUS="WARNING - ${path}:"
        fi        
    else
        if test -s $err; then
            level=2
            STATUS="CRITICAL - $(<$err):"
        else
            level=2
            STATUS="CRITICAL - ${path} is empty:"
        fi
    fi
else
            level=2
            STATUS="CRITICAL - ${path} not mounted:"
fi
echo ${STATUS} $(<$time)
rm $time $out $err 2>&1 > /dev/null
exit $level