103 lines
2.2 KiB
Bash
Executable file
103 lines
2.2 KiB
Bash
Executable file
#!/bin/sh
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# Quick and dirty script around dig +trace
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# Stop on any uncaucht error
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set -e
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# Initialization
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OUTPUT_EXIT_STATUS=0
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OUTPUT_DETAIL_OK=""
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OUTPUT_DETAIL_CRITICAL=""
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OUTPUT_DETAIL_UNKNOWN=""
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OUTPUT_PERFDATA=""
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LOGGER=""
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TIMEOUT=3
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#
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# Help function
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#
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usage() {
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cat <<EOF
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Usage:
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$0 -d example.net
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$0 -h (this help output)
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EOF
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}
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if ! which dig >/dev/null 2>&1; then
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echo "UNKNOWN 'dig' not found."
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exit 3
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fi
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if [ -z "$LOGGER" ] && which logger >/dev/null 2>&1; then
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LOGGER="logger"
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fi
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#
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# Gestion des paramètres
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#
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while getopts hd: f; do
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case "$f" in
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'h')
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usage
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exit
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;;
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'd')
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# Let's chronometer the resolution
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CHRONO="$(( $( date +%s%N ) / 1000000 ))"
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OUTPUT="$( dig +trace +all +timeout=$TIMEOUT "$OPTARG" )"
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DIG_STATUS_CODE="$?"
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CHRONO="$(( $( date +%s%N ) / 1000000 - $CHRONO ))"
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# Store the perfdata for each domain
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OUTPUT_PERFDATA="$OUTPUT_PERFDATA 't_$( echo $OPTARG | tr -cd 'a-zA-Z0-9. ' )'=$CHRONO""ms;;;0"
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if [ "$DIG_STATUS_CODE" -ne "0" ]; then
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# 'dig' output an error -> status unknown.
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OUTPUT_DETAIL_UNKNOWN=" dig returned error code $DIG_STATUS_CODE"
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OUTPUT_EXIT_STATUS=3
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break # I don't feel like we should go on, should we ?
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else
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# Unfortunately, I couldn't get a proper way to know if the resolution
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# was successful. So parsing the output it is...
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# We're looking for a line like 'www.kernel.org. 3600 IN ...'
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if ! echo "$OUTPUT" | egrep "^$OPTARG.?[[:space:]]+[0-9]+[[:space:]]+IN[[:space:]]+" >/dev/null 2>&1; then
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[ -z "$LOGGER" ] || echo "$OUTPUT" | $LOGGER
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OUTPUT_DETAIL_CRITICAL="$OUTPUT_DETAIL_CRITICAL $OPTARG"
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OUTPUT_EXIT_STATUS=2
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else
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OUTPUT_DETAIL_OK="$OUTPUT_DETAIL_OK $OPTARG"
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fi
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fi
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;;
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\?)
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usage
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exit 1
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;;
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esac
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done
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case "$OUTPUT_EXIT_STATUS" in
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'0')
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if [ -z "$OUTPUT_DETAIL_OK" ]; then
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OUTPUT_DETAIL_OK=" (no domains tested)"
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fi
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# Trick for the perfdata : convert the first space to the separator '|'
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printf "OK%s%s\n" "$OUTPUT_DETAIL_OK" "$( echo "$OUTPUT_PERFDATA" | sed 's/^ /|/' )"
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;;
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'2')
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printf "CRITICAL%s\n" "$OUTPUT_DETAIL_CRITICAL"
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;;
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'3')
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printf "UNKOWN%s\n" "$OUTPUT_DETAIL_CRITICAL"
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;;
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esac
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exit "$OUTPUT_EXIT_STATUS"
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