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16 lines
336 B
16 lines
336 B
3 years ago
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function EPHEMERAL_PORT() {
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LOW_BOUND=49152
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RANGE=16384
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while true; do
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CANDIDATE=$[$LOW_BOUND + ($RANDOM % $RANGE)]
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(echo "" >/dev/tcp/127.0.0.1/${CANDIDATE}) >/dev/null 2>&1
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if [ $? -ne 0 ]; then
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echo $CANDIDATE
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break
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fi
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done
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}
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port=$(EPHEMERAL_PORT)
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echo $port
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