--- filtergen-0.12.4.orig/input/iptables/scan.c
+++ filtergen-0.12.4/input/iptables/scan.c
@@ -0,0 +1,57 @@
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "parser.h"
+
+extern char * yytext;
+int yylex();
+long int lineno();
+char * filename();
+
+char * tok_map(int c) {
+    char * r;
+    switch (c) {
+      case TOK_TABLE:
+	r = strdup("table"); break;
+      case TOK_CHAIN:
+	r = strdup("chain"); break;
+      case TOK_OPTION:
+	r = strdup("option"); break;
+      case TOK_IDENTIFIER:
+	r = strdup("identifier"); break;
+      case TOK_LSQUARE:
+	r = strdup("lsquare"); break;
+      case TOK_RSQUARE:
+	r = strdup("rsquare"); break;
+      case TOK_COLON:
+	r = strdup("colon"); break;
+      case TOK_BANG:
+	r = strdup("bang"); break;
+      case TOK_QUOTE:
+	r = strdup("quote"); break;
+      case TOK_COMMIT:
+	r = strdup("commit"); break;
+      case TOK_NEWLINE:
+	r = strdup("newline"); break;
+      default:
+	r = strdup("UNRECOGNISED"); break;
+    }
+    return r;
+}  
+
+int main(int argc __attribute__((unused)), char ** argv __attribute__((unused))) {
+    int c;
+
+    /* if running in make distcheck the cwd isn't the same as the srcdir */
+    if (getenv("srcdir")) {
+	chdir(getenv("srcdir"));
+    }
+
+    while ((c = yylex())) {
+	printf("kind = %s, spelling = \"%s\", file = \"%s\", line = %ld\n", tok_map(c), yytext, filename(), lineno());
+    }
+    return 0;
+}
+