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36 lines
837 B
Bash
Executable File
36 lines
837 B
Bash
Executable File
#!/bin/bash
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# i3blocks ethernet indicator with one external helper at most.
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set -euo pipefail
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find_ethernet_interface() {
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local iface_path iface
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for iface_path in /sys/class/net/*; do
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iface=${iface_path##*/}
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[[ $iface == lo ]] && continue
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[[ -d ${iface_path}/wireless ]] && continue
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[[ -r ${iface_path}/operstate ]] || continue
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printf '%s\n' "$iface"
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return 0
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done
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return 1
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}
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iface=$(find_ethernet_interface) || {
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printf ' down\n'
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exit 0
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}
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read -r state < "/sys/class/net/${iface}/operstate"
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if [[ $state != up ]]; then
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printf ' down\n'
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exit 0
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fi
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addr_output=$(ip -o -4 addr show dev "$iface" scope global 2> /dev/null) || addr_output=''
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if [[ $addr_output =~ ([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+/[0-9]+) ]]; then
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printf ' %s\n' "${BASH_REMATCH[1]}"
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else
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printf ' down\n'
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fi
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