USAGE
fprintf(stderr, USAGE);
#ifdef USAGE
goto USAGE;
USAGE:
fprintf(stderr, USAGE, Pname, Pname);
static const char USAGE[] = "%s: USAGE: %s [-du] [-p PID] -f file\n";
(void)fprintf(stderr, "Usage: %s %s\n", getprogname(), USAGE);
errx(EXIT_FAILURE, "%s", USAGE);
errx(EXIT_FAILURE, "%s", USAGE);