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authorJacob Janzen <jacob.a.s.janzen@gmail.com>2024-10-01 18:59:51 -0500
committerJacob Janzen <jacob.a.s.janzen@gmail.com>2024-10-01 18:59:51 -0500
commit595b5788d596e8dcf3a79f42b670a018fffd2a37 (patch)
tree42748a38cb8a4cc88c96922951ec71100831d2ef /nixos/.flake/system/update-resolv-conf.sh
parent7b0ea5cbdaaa5b8392777ad207c74cb27411eab1 (diff)
nixos stuff
Diffstat (limited to 'nixos/.flake/system/update-resolv-conf.sh')
-rw-r--r--nixos/.flake/system/update-resolv-conf.sh71
1 files changed, 71 insertions, 0 deletions
diff --git a/nixos/.flake/system/update-resolv-conf.sh b/nixos/.flake/system/update-resolv-conf.sh
new file mode 100644
index 0000000..16622a1
--- /dev/null
+++ b/nixos/.flake/system/update-resolv-conf.sh
@@ -0,0 +1,71 @@
+#!/usr/bin/env bash
+#
+# Parses DHCP options from openvpn to update resolv.conf
+# To use set as 'up' and 'down' script in your openvpn *.conf:
+# up /etc/openvpn/update-resolv-conf
+# down /etc/openvpn/update-resolv-conf
+#
+# Used snippets of resolvconf script by Thomas Hood <jdthood@yahoo.co.uk>
+# and Chris Hanson
+# Licensed under the GNU GPL. See /usr/share/common-licenses/GPL.
+# 07/2013 colin@daedrum.net Fixed intet name
+# 05/2006 chlauber@bnc.ch
+#
+# Example envs set from openvpn:
+# foreign_option_1='dhcp-option DNS 193.43.27.132'
+# foreign_option_2='dhcp-option DNS 193.43.27.133'
+# foreign_option_3='dhcp-option DOMAIN be.bnc.ch'
+# foreign_option_4='dhcp-option DOMAIN-SEARCH bnc.local'
+
+## The 'type' builtins will look for file in $PATH variable, so we set the
+## PATH below. You might need to directly set the path to 'resolvconf'
+## manually if it still doesn't work, i.e.
+## RESOLVCONF=/usr/sbin/resolvconf
+export PATH=$PATH:/sbin:/usr/sbin:/bin:/usr/bin
+RESOLVCONF=$(type -p resolvconf)
+
+case $script_type in
+
+up)
+ for optionname in ${!foreign_option_*} ; do
+ option="${!optionname}"
+ echo $option
+ part1=$(echo "$option" | cut -d " " -f 1)
+ if [ "$part1" == "dhcp-option" ] ; then
+ part2=$(echo "$option" | cut -d " " -f 2)
+ part3=$(echo "$option" | cut -d " " -f 3)
+ if [ "$part2" == "DNS" ] ; then
+ IF_DNS_NAMESERVERS="$IF_DNS_NAMESERVERS $part3"
+ fi
+ if [[ "$part2" == "DOMAIN" || "$part2" == "DOMAIN-SEARCH" ]] ; then
+ IF_DNS_SEARCH="$IF_DNS_SEARCH $part3"
+ fi
+ fi
+ done
+ R=""
+ if [ "$IF_DNS_SEARCH" ]; then
+ R="search "
+ for DS in $IF_DNS_SEARCH ; do
+ R="${R} $DS"
+ done
+ R="${R}
+"
+ fi
+
+ for NS in $IF_DNS_NAMESERVERS ; do
+ R="${R}nameserver $NS
+"
+ done
+ #echo -n "$R" | $RESOLVCONF -x -p -a "${dev}"
+ echo -n "$R" | $RESOLVCONF -x -a "${dev}.inet"
+ ;;
+down)
+ $RESOLVCONF -d "${dev}.inet"
+ ;;
+esac
+
+# Workaround / jm@epiclabs.io
+# force exit with no errors. Due to an apparent conflict with the Network Manager
+# $RESOLVCONF sometimes exits with error code 6 even though it has performed the
+# action correctly and OpenVPN shuts down.
+exit 0