allow '%' escape; treat anything else as error

diff --git a/libraries/librewrite/subst.c b/libraries/librewrite/subst.c
index ee32dbd76f96ec92df051759b29c5962c3a877ec..c96e15ce570d5817611e1dcc42598c87d5af36de 100644 (file)
--- a/libraries/librewrite/subst.c
+++ b/libraries/librewrite/subst.c
@@ -160,6 +160,16 @@ rewrite_subst_compile(
                        submatch[ nsub ].ls_type =
                                REWRITE_SUBMATCH_MAP_W_ARG;
                        submatch[ nsub ].ls_map = map;
+
+               /*
+                * Escape '%' ...
+                */
+               } else if ( p[ 1 ] == '%' ) {
+                       AC_MEMCPY( &p[ 1 ], &p[ 2 ], strlen( &p[ 1 ] ) );
+                       continue;
+
+               } else {
+                       return NULL;
                }
 
                nsub++;