openwrtv3/package/base-files/files/etc/uci-defaults/11_migrate-sysctl

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#!/bin/sh
if [ ! -f "/rom/etc/sysctl.conf" ] || cmp -s "/rom/etc/sysctl.conf" "/etc/sysctl.conf"; then
exit 0
fi
fingerprint="$(md5sum /etc/sysctl.conf)"
fingerprint="${fingerprint%% *}"
if [ "$fingerprint" = "1b05ebb41f72cb84e5510573cd4aca26" ] || \
[ "$fingerprint" = "62deb895be1a7f496040187b7c930e4e" ]; then
logger -t migrate-sysctl "Updating sysctl.conf to use current defaults"
cp "/rom/etc/sysctl.conf" "/etc/sysctl.conf"
fi
exit 0