receive specified signal just reload config/hosts not stop

[rufengsuixing]

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Problem Description

such as dnsmasq

When it receives a SIGHUP, dnsmasq clears its cache and then re-loads /etc/hosts and /etc/ethers and any file given by --dhcp-hostsfile, --dhcp-hostsdir, --dhcp-optsfile, --dhcp-optsdir, --addn-hosts or --hostsdir. The dhcp lease change script is called for all existing DHCP leases. If --no-poll is set SIGHUP also re-reads /etc/resolv.conf. SIGHUP does NOT re-read the configuration file.

i am the luci author of AdH,https://github.com/rufengsuixing/luci-app-adguardhome
i want to use signal to let AdG reload /etc/hosts ,because ipv6 device always change their ips and i set crontab to set them in /etc/hosts every hour , if i stop and start Adh ,dns resolve maybe break for seconds,so is there any way to let Adh have a hot reload not breaking requests.

[ameshkov]

Makes sense, thank you!