25 lines
380 B
Bash
Executable File
25 lines
380 B
Bash
Executable File
#/bin/bash
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# Read domains form stdin and echo the ones resolved successfully
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server=""
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if [ "$#" -ge 1 ] && [ -n "$1" ] ; then
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server="$1"
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fi
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first=true
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while read line; do
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for domain in $line ; do
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host "$domain" $server &>/dev/null
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if [ "$?" -eq 0 ] ; then
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if "$first" ; then
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first=false
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else
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echo -n ' '
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fi
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echo -n "$domain"
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fi
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done
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done
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exit 0
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