Index: altium_parser/main.c
===================================================================
--- altium_parser/main.c	(revision 35276)
+++ altium_parser/main.c	(revision 35277)
@@ -2,13 +2,16 @@
 #include <string.h>
 #include "pcbdoc_ascii.h"
 
-int main()
+int main(int argc, char *argv[])
 {
 	const char *fn = "A.PcbDoc";
 	FILE *f;
 	altium_tree_t tree = {0};
 	int res;
-	
+
+	if (argc > 1)
+		fn = argv[1];
+
 	f = fopen(fn, "r");
 	if (f == NULL) {
 		fprintf(stderr, "can't open %s for read\n", fn);