exit_code 227 src/main.c int exit_code = EXIT_FAILURE; exit_code 252 src/main.c return exit_code; exit_code 275 src/main.c exit_code = EXIT_SUCCESS; exit_code 427 src/main.c exit_code = EXIT_SUCCESS; exit_code 429 src/main.c exit_code = do_nc () ? EXIT_SUCCESS : EXIT_FAILURE; exit_code 521 src/main.c exit_code = EXIT_FAILURE; exit_code 526 src/main.c return exit_code;