resolvconf -u fails with "command not found" when using local nameservers (127.0.0.1, ::1)

[ih8d8]

Environment

• openresolv version: 3.17.2
• OS: Arch Linux
• Shell: bash

---

Description

When using local nameservers like 127.0.0.1 or ::1 in a resolvconf configuration file, running resolvconf -u fails with an error attempting to execute the IP address as a command.

Steps to Reproduce

1. Create a resolvconf configuration with local nameservers (I use this for DNSCrypt-Proxy):

   echo -e "nameserver ::1\nnameserver 127.0.0.1\noptions edns0 single-request-reopen" | sudo resolvconf -a dnscrypt

2. Verify the file was created:

   cat /var/run/resolvconf/keys/dnscrypt

   Output:

   nameserver ::1
   nameserver 127.0.0.1
   options edns0 single-request-reopen
   

3. Run the update command:

   sudo resolvconf -u

Expected Behavior

The command should successfully merge all resolvconf configurations and update /etc/resolv.conf with the nameservers.

Actual Behavior

The command fails with the following error:

/usr/bin/resolvconf: line 999: 127.0.0.1: command not found

[lazypingu]

I can confirm this issue in combination with iwd on Gentoo. No local nameserver configured.

[rsmarples]

Hopefully this patch fixes things - can people please confirm and no more breakage?

[gudvinr]

It's broken for NetworkManager as well:

NetworkManager[794]: <info>  [1765613612.6364] dns-mgr: Writing DNS information to /usr/bin/resolvconf
NetworkManager[1629]: /usr/bin/resolvconf: line 996: ::1: command not found
NetworkManager[1640]: /usr/bin/resolvconf: line 999: 192.???.???.1: command not found

[marco-parillo]

Hopefully this patch fixes things - can people please confirm and no more breakage?

DNS resolution on KaOS with this patch: https://codeberg.org/KaOS/core/src/commit/46c6cd7fbee0fb2c19f43d622349fc9656f09867/openresolv/PKGBUILD
works again for me.

[lazypingu]

Tested with branch quote-on-printf on Gentoo. I can confirm this works for me as well. No errors on resolvconf -u. The resulting /etc/resolv.conf now contains the nameserver entries again.

Thanks!