Update DNSFILE even if DNSFILE contains only commented or empty lines

[live-boot-grml.git] / components / 9990-main.sh

diff --git a/components/9990-main.sh b/components/9990-main.sh
index 20e8c0c..bab0bd7 100755 (executable)
--- a/components/9990-main.sh
+++ b/components/9990-main.sh
@@ -162,7 +162,7 @@ Live ()
        else
                DNSFILE="${rootmnt}/etc/resolv.conf"
        fi
-       if [ -f /etc/resolv.conf ] && [ ! -s ${DNSFILE} ]
+       if [ -f /etc/resolv.conf ] && ! grep -E -q -v '^[[:space:]]*#|^[[:space:]]*$' ${DNSFILE}
        then
                log_begin_msg "Copying /etc/resolv.conf to ${DNSFILE}"
                cp -v /etc/resolv.conf ${DNSFILE}