1 files changed, 30 insertions, 0 deletions

diff --git a/debian/openssh-client.preinst b/debian/openssh-client.preinst
new file mode 100644
index 000000000..0e200712e
--- /dev/null
+++ b/debian/openssh-client.preinst
@@ -0,0 +1,30 @@
+#! /bin/sh -e
+
+action="$1"
+version="$2"
+
+prepare_transfer_conffile () {
+        CONFFILE="$1"
+        [ -e "$CONFFILE" ] || return 0
+
+        md5sum="$(md5sum "$CONFFILE" |sed -e 's/ .*//')"
+        old_md5sum="$(sed -n -e "/^Conffiles:/,/^[^ ]/{\\' $CONFFILE'{s/^ [^ ]* //;s/ .*//;p}}" /var/lib/dpkg/status)"
+        if [ "$md5sum" = "$old_md5sum" ]; then
+                echo >&2 "Transferring ownership of conffile $CONFFILE ..."
+                mv -f "$CONFFILE" "$CONFFILE.moved-by-preinst"
+                return 0
+        fi
+}
+
+case $action in
+        install|upgrade)
+                if dpkg --compare-versions "$version" lt 0; then
+                        prepare_transfer_conffile /etc/ssh/moduli
+                        prepare_transfer_conffile /etc/ssh/ssh_config
+                fi
+                ;;
+esac
+
+#DEBHELPER#
+
+exit 0