examples/udhcp: do not rewrite resolv.conf if no DNS servers. Closes 6788
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/examples/udhcp/sample.bound b/examples/udhcp/sample.bound
index bd3569c..7c9d857 100755
--- a/examples/udhcp/sample.bound
+++ b/examples/udhcp/sample.bound
@@ -22,10 +22,14 @@
done
fi
-echo -n > $RESOLV_CONF
-[ -n "$domain" ] && echo domain $domain >> $RESOLV_CONF
-for i in $dns
-do
- echo adding dns $i
- echo nameserver $i >> $RESOLV_CONF
-done
+# Only replace resolv.conf is we have at least one DNS server
+if [ -n "$dns" ]
+then
+ echo -n > $RESOLV_CONF
+ [ -n "$domain" ] && echo domain $domain >> $RESOLV_CONF
+ for i in $dns
+ do
+ echo adding dns $i
+ echo nameserver $i >> $RESOLV_CONF
+ done
+fi