Function fatal

freebsd/contrib/openzfs/cmd/ztest/ztest.c:590–618

char *fatal_msg;

static void
fatal(int do_perror, char *message, ...)
{
	va_list args;
	int save_errno = errno;
	char *buf;

	(void) fflush(stdout);
	buf = umem_alloc(FATAL_MSG_SZ, UMEM_NOFAIL);

	va_start(args, message);
	(void) sprintf(buf, "ztest: ");
	/* LINTED */
	(void) vsprintf(buf + strlen(buf), message, args);
	va_end(args);
	if (do_perror) {
		(void) snprintf(buf + strlen(buf), FATAL_MSG_SZ - strlen(buf),
		    ": %s", strerror(save_errno));
	}
	(void) fprintf(stderr, "%s\n", buf);
	fatal_msg = buf;			/* to ease debugging */

	if (ztest_dump_core)
		abort();
	else
		dump_debug_buffer();

	exit(3);
}

static int
str2shift(const char *buf)