fix: print bare program name in usage instead of argv[0] path

tools/funpack.c

@@ -13,6 +13,12 @@
 #define MKDIR(path) mkdir(path, 0755)
 #endif
 
+#ifdef _WIN32
+#define PROGRAM_NAME "funpack.exe"
+#else
+#define PROGRAM_NAME "funpack"
+#endif
+
 #define FUNPACK_LIST     (1u << 0)
 #define FUNPACK_PROGRESS (1u << 1)
 #define FUNPACK_QUIET    (1u << 2)
@@ -146,9 +152,9 @@ static int extract_entry(const char *out_dir, const fpk_entry_t *entry,
 	return 1;
 }
 
-static void usage(const char *name)
+static void usage(void)
 {
-	fprintf(stderr, "usage: %s [-d output_dir] [-l] [-p] [-q] [-v] input.fpk\n", name);
+	fprintf(stderr, "usage: %s [-d output_dir] [-l] [-p] [-q] [-v] input.fpk\n", PROGRAM_NAME);
 	exit(1);
 }
 
@@ -180,12 +186,12 @@ int main(int argc, char **argv)
 			flags |= FUNPACK_VERBOSE;
 			break;
 		default:
-			usage(argv[0]);
+			usage();
 		}
 	}
 
 	if (optind != argc - 1)
-		usage(argv[0]);
+		usage();
 
 	input = argv[optind];