25 lines
312 B
Bash
25 lines
312 B
Bash
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#!/bin/sh
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set -e
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export LANG=C
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ip -brief link show dev "$1" | read iface state mac rest
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which=""
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while read testmac scheme; do
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if [ "$which" ]; then
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continue;
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fi
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if [ "$mac" = "$(echo "$testmac" | tr A-F a-f)" ]; then
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which="$scheme";
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fi
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done
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if [ "$which" ]; then
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echo "$which";
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else
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exit 1;
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fi
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