Filters: fix "vacation" in Exim filter. Bug 2593

[exim.git] / src / src / transports / autoreply.c

diff --git a/src/src/transports/autoreply.c b/src/src/transports/autoreply.c
index 90a5aa4be6f3aa58d6d082247e9ea4a4bda06f48..865abbf4f555b73b005817027da9a001fc557be2 100644 (file)
--- a/src/src/transports/autoreply.c
+++ b/src/src/transports/autoreply.c
@@ -3,6 +3,7 @@
 *************************************************/
 
 /* Copyright (c) University of Cambridge 1995 - 2018 */
+/* Copyright (c) The Exim Maintainers 2020 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 
@@ -473,10 +474,10 @@ if (oncelog && *oncelog && to)
   else
     {
     EXIM_DATUM key_datum, result_datum;
-    uschar * dirname = string_copy(oncelog);
-    uschar * s;
+    uschar * dirname, * s;
 
-    if ((s = Ustrrchr(dirname, '/'))) *s = '\0';
+    dirname = (s = Ustrrchr(oncelog, '/'))
+      ? string_copyn(oncelog, s - oncelog) : NULL;
     EXIM_DBOPEN(oncelog, dirname, O_RDWR|O_CREAT, ob->mode, &dbm_file);
     if (!dbm_file)
       {