Find resolvconf automatically does not always work

[usommerl]

The script isn't working anymore on my system. I've tracked the issue down to commit 994574f. I don't know what's the problem right now. The script works flawless if I revert commit 994574f.

$ which resolvconf
/usr/bin/resolvconf

$ pacman -Qi openvpn-update-resolv-conf-git
Name            : openvpn-update-resolv-conf-git
Version         : r24.994574f-1
Description     : OpenVPN Update resolvconf
Architecture    : any
URL             : https://github.com/masterkorp/openvpn-update-resolv-conf
Licenses        : GPL
Groups          : None
Provides        : None
Depends On      : openvpn  openresolv  bash
Optional Deps   : None
Required By     : None
Optional For    : None
Conflicts With  : None
Replaces        : None
Installed Size  : 3.00 KiB
Packager        : Unknown Packager
Build Date      : Tue 19 Apr 2016 09:20:54 PM CEST
Install Date    : Tue 19 Apr 2016 09:20:59 PM CEST
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : None

$ pacman -Qi openresolv
Name            : openresolv
Version         : 3.7.2-1
Description     : resolv.conf management framework (resolvconf)
Architecture    : any
URL             : http://roy.marples.name/projects/openresolv
Licenses        : custom:BSD
Groups          : None
Provides        : resolvconf
Depends On      : bash
Optional Deps   : None
Required By     : openvpn-update-resolv-conf-git
Optional For    : networkmanager  vpnc
Conflicts With  : None
Replaces        : None
Installed Size  : 48.00 KiB
Packager        : Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
Build Date      : Mon 23 Nov 2015 01:12:47 AM CET
Install Date    : Mon 14 Dec 2015 08:57:40 PM CET
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : Signature

$ bash --version
GNU bash, version 4.3.42(1)-release (x86_64-unknown-linux-gnu)
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

$ uname -a
Linux nyx 4.5.1-1-ARCH #1 SMP PREEMPT Thu Apr 14 19:19:32 CEST 2016 x86_64 GNU/Linux

[usommerl]

I've added a debug statement and ran the script with commit 994574f:

Apr 20 06:53:32 nyx update-resolv-conf[5271]: RESOLVCONF=

I'm using a systemd unit to activate the openvpn configuration that triggers the execution of the script

[maleadt]

Bumped in this as well, and I assume this is because OpenVPN scrubs the environment before invoking the up or down scripts (you can verify this by adding an env command to the script). One of the missing environment variables is PATH, breaking which.

Workaround: add setenv PATH /usr/bin (or wherever your resolvconf binary is located) to your OpenVPN config.

[usommerl]

@maleadt You are right. I initially thought it was systemd that scrubs the environment but that is not the case. Your solution works for me as well and I think it is better than to modify update-resolv-conf.sh itself.

[usommerl]

Configuration issue. There is no reasonable way to fix this in openvpn-update-resolv-conf. You can circumvent this issue by adding the following option to your OpenVPN-Client configuration:

setenv PATH <DIRECTORY_WITH_RESOLVCONF_BINARY>