--- src/header.c	2002-07-19 17:23:58.000000000 +0900
+++ src/header.c	2004-06-16 09:49:23.000000000 +0900
@@ -648,8 +648,17 @@
 	}
 
 	if (dir_length) {
+		if ((dir_length + name_length) > sizeof(dirname)) {
+			fprintf(stderr, "Insufficient buffer size\n");
+			exit(112);
+		}
 		strcat(dirname, hdr->name);
-		strcpy(hdr->name, dirname);
+
+		if ((dir_length + name_length) > sizeof(hdr->name)) {
+			fprintf(stderr, "Insufficient buffer size\n");
+			exit(112);
+		}
+		strncpy(hdr->name, dirname, sizeof(hdr->name));
 		name_length += dir_length;
 	}