mirror of
https://github.com/tonusoo/koduinternet-cpe
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44 lines
1.3 KiB
Plaintext
44 lines
1.3 KiB
Plaintext
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#!/usr/bin/env bash
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# Title : rm-expired-prefixes
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# Last modified date : 16.03.2023
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# Author : Martin Tonusoo
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# Description : Script removes expired "prefix" statements from
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# /etc/radvd.conf file based on the expiration
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# field(ISO 8601 timestamp) at the end of "prefix"
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# line. The expiration field is added to the "prefix"
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# statements by dhclient exit hook.
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# Options :
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# Notes :
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radvd_conf="/etc/radvd.conf"
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new_radvd_conf="${radvd_conf}.rm-expired-prefixes.$$"
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while IFS= read -r line; do
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case "$line" in
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" prefix "*)
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# Add the "prefix" statement if its timestamp
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# is in the future.
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if [[ "${line##* }" > $(date --iso-8601="seconds") ]]; then
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echo "$line"
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else
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prefix="${line%% \{*}"
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logger -t "rm-expired-prefixes" -p daemon.info \
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"INFO: Removed expired ${prefix# } from $radvd_conf"
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fi
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;;
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*)
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echo "$line"
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;;
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esac
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done < "$radvd_conf" >> "$new_radvd_conf"
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chown --reference="$radvd_conf" "$new_radvd_conf"
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chmod --reference="$radvd_conf" "$new_radvd_conf"
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mv -f "$new_radvd_conf" "$radvd_conf"
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systemctl is-active --quiet radvd.service && systemctl reload radvd.service
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