1 files changed, 49 insertions, 0 deletions

diff --git a/debian/openssh-client.preinst b/debian/openssh-client.preinst
new file mode 100644
index 000000000..0b29c051d
--- /dev/null
+++ b/debian/openssh-client.preinst
@@ -0,0 +1,49 @@
+#! /bin/sh -e
+
+ETC_SSH_MODULI=@ETC_SSH_MODULI@
+
+ETC_SSH_SSH_CONFIG=@ETC_SSH_SSH_CONFIG@
+
+action="$1"
+version="$2"
+
+prepare_transfer_conffile () {
+        CONFFILE="$1"
+        TEXT="$2"
+        MODE="$3"
+        [ "$CONFFILES" ] || return 0
+        [ -e "$CONFFILE" ] || return 0
+
+        md5sum="$(md5sum "$CONFFILE" |sed -e 's/ .*//')"
+        old_md5sum="$(echo "$CONFFILES" | awk '$1 == "'"$CONFFILE"'" { print $2 }')"
+        if [ "$md5sum" = "$old_md5sum" ]; then
+                echo >&2 "Transferring ownership of conffile $CONFFILE ..."
+                # We have to write out the desired new text of the conffile,
+                # which is tricky in the preinst, hence the nasty way we
+                # have to hardcode the text here. Fortunately, this is only
+                # necessary with sarge's dpkg and older.
+                if echo "$TEXT" | head -n1 | grep -q '^@.*@$'; then
+                        echo >&2 'Unsubstituted conffile text! Please report this bug.'
+                        exit 1
+                fi
+                printf '%s' "$TEXT" >"$CONFFILE.dpkg-new"
+                chmod "$MODE" "$CONFFILE.dpkg-new"
+                mv -f "$CONFFILE" "$CONFFILE.moved-by-preinst"
+                mv -f "$CONFFILE.dpkg-new" "$CONFFILE"
+                return 0
+        fi
+}
+
+case $action in
+        install|upgrade)
+                if dpkg --compare-versions "$version" lt 0; then
+                        CONFFILES="$(dpkg-query -W -f '${Conffiles}\n' ssh 2>/dev/null | sed 's/^ *//')"
+                        prepare_transfer_conffile /etc/ssh/moduli "$ETC_SSH_MODULI" 0644
+                        prepare_transfer_conffile /etc/ssh/ssh_config "$ETC_SSH_SSH_CONFIG" 0644
+                fi
+                ;;
+esac
+
+#DEBHELPER#
+
+exit 0