Function getsock_cap

freebsd/kern/uipc_syscalls.c:96–116

* Convert a user file descriptor to a kernel file entry and check if required * capability rights are present. * If required copy of current set of capability rights is returned. * A reference on the file entry is held upon returning. */

 * A reference on the file entry is held upon returning.
 */
int
getsock_cap(struct thread *td, int fd, cap_rights_t *rightsp,
    struct file **fpp, u_int *fflagp, struct filecaps *havecapsp)
{
	struct file *fp;
	int error;

	error = fget_cap(td, fd, rightsp, &fp, havecapsp);
	if (error != 0)
		return (error);
	if (fp->f_type != DTYPE_SOCKET) {
		fdrop(fp, td);
		if (havecapsp != NULL)
			filecaps_free(havecapsp);
		return (ENOTSOCK);
	}
	if (fflagp != NULL)
		*fflagp = fp->f_flag;
	*fpp = fp;
	return (0);
}

/*
 * System call interface to the socket abstraction.