Function accept1

freebsd/kern/uipc_syscalls.c:272–314

* accept1() */

(td, s, uname, anamelen, flags)

 * accept1()
 */
static int
accept1(td, s, uname, anamelen, flags)
	struct thread *td;
	int s;
	struct sockaddr *uname;
	socklen_t *anamelen;
	int flags;
{
	struct sockaddr *name;
	socklen_t namelen;
	struct file *fp;
	int error;

	if (uname == NULL)
		return (kern_accept4(td, s, NULL, NULL, flags, NULL));

	error = copyin(anamelen, &namelen, sizeof (namelen));
	if (error != 0)
		return (error);

	error = kern_accept4(td, s, &name, &namelen, flags, &fp);

	if (error != 0)
		return (error);

	if (error == 0 && uname != NULL) {
#ifdef COMPAT_OLDSOCK
		if (SV_PROC_FLAG(td->td_proc, SV_AOUT) &&
		    (flags & ACCEPT4_COMPAT) != 0)
			((struct osockaddr *)name)->sa_family =
			    name->sa_family;
#endif
		error = copyout(name, uname, namelen);
	}
	if (error == 0)
		error = copyout(&namelen, anamelen,
		    sizeof(namelen));
	if (error != 0)
		fdclose(td, fp, td->td_retval[0]);
	fdrop(fp, td);
	free(name, M_SONAME);
	return (error);
}

int
kern_accept(struct thread *td, int s, struct sockaddr **name,