Bug in helper contrib/examples/reresolve-dns/reresolve-dns.sh

[Conrad Meyer]

Thanks for fixing it so quickly!

Would it be possible to use env as the interpreter for systems which don't
place bash directly in /bin?  I think that's my only other significant
local modification to the script on my BSD systems.  I.e.,

-#!/bin/bash
+#!/usr/bin/env bash

Best regards,
Conrad

P.S., If it is helpful, I also have some example SystemD unit files for
connecting this script up in that universe, which I'm pretty sure I stole
from ArchWiki (https://wiki.archlinux.org/index.php/WireGuard) but I don't
remember at this point.  It might be nice to other users to shove some
version of them in the examples/reresolve-dns directory as an example for
folks on systemd.

$ cat wg-reresolve-dns.timer
[Unit]
Description=Periodically reresolve DNS of Wireguard endpoints that have
stopped responding

[Timer]
OnCalendar=*:*:0/30

[Install]
WantedBy=timers.target

# The hardcoded wgnet0 below could probably be transformed into
an @.service, like wg-quick at .service.  Also, dnsmasq.service is just a
quirk of my personal DNS configuration; others might depend on different or
non-local resolvers.

$ cat wg-reresolve-dns.service
[Unit]
Description=Reresolve DNS of all WireGuard endpoints that have missed a
handshake
Wants=network-online.target dnsmasq.service wg-quick at wgnet0.service
After=network-online.target dnsmasq.service wg-quick at wgnet0.service

[Service]
Type=oneshot
ExecStart=/bin/sh -c 'for i in /etc/wireguard/*.conf; do
/usr/share/doc/wireguard/examples/reresolve-dns/reresolve-dns.sh "$i"; done'

# Finally, here's an example of systemd units that use the more general
@.timer and @.service (but lack the unit dependencies):
https://gist.github.com/ephemient/45ffc8c143d3c4f3d1a940f4293e4b84


On Wed, Nov 27, 2019 at 04:31 Jason A. Donenfeld <Jason at zx2c4.com> wrote:

> Thanks for the suggestion!
>
>
> https://git.zx2c4.com/WireGuard/commit/?id=d05b6606886018853da20ca3ee8bda16524b53b9
>
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