diff --git a/functions.sh b/functions.sh
index 2643439..d67f8f9 100644
--- a/functions.sh
+++ b/functions.sh
@@ -53,11 +53,29 @@ sed_in_place () {
     fi
 }
 
+# podman_unshare prefixed
 podman_unshare_sed_in_place () {
     podman_unshare='podman unshare'
     sed_in_place "${1}" "${2}" "${3}"
 }
 
+# sed or die trying
+sed_in_place_multiline () {
+    ${podman_unshare} grep -z -q "${1}" "${3}"
+    if [ $? -eq 0 ]; then
+	${podman_unshare} sed -z -i -e "s|${1}|${2}|g" ${3}
+    else
+	echo "Pattern ${1} not found in file ${3}, exiting."
+	exit 1
+    fi
+}
+
+# podman_unshare prefixed
+podman_unshare_sed_in_place_multiline () {
+    podman_unshare='podman unshare'
+    sed_in_place_multiline "${1}" "${2}" "${3}"
+}
+
 # check: systemd unit exists
 check_systemd_unit_exists () {
   systemctl --user cat -- ${1} &> /dev/null