Function audit_pipe_ioctl

freebsd/security/audit/audit_pipe.c:691–893

* Audit pipe ioctl() routine. Handle file descriptor and audit pipe layer * commands. */

 * commands.
 */
static int
audit_pipe_ioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag,
    struct thread *td)
{
	struct auditpipe_ioctl_preselect *aip;
	struct audit_pipe *ap;
	au_mask_t *maskp;
	int error, mode;
	au_id_t auid;

	error = devfs_get_cdevpriv((void **)&ap);
	if (error != 0)
		return (error);

	/*
	 * Audit pipe ioctls: first come standard device node ioctls, then
	 * manipulation of pipe settings, and finally, statistics query
	 * ioctls.
	 */
	switch (cmd) {
	case FIONBIO:
		AUDIT_PIPE_LOCK(ap);
		if (*(int *)data)
			ap->ap_flags |= AUDIT_PIPE_NBIO;
		else
			ap->ap_flags &= ~AUDIT_PIPE_NBIO;
		AUDIT_PIPE_UNLOCK(ap);
		error = 0;
		break;

	case FIONREAD:
		AUDIT_PIPE_LOCK(ap);
		*(int *)data = ap->ap_qbyteslen - ap->ap_qoffset;
		AUDIT_PIPE_UNLOCK(ap);
		error = 0;
		break;

	case FIOASYNC:
		AUDIT_PIPE_LOCK(ap);
		if (*(int *)data)
			ap->ap_flags |= AUDIT_PIPE_ASYNC;
		else
			ap->ap_flags &= ~AUDIT_PIPE_ASYNC;
		AUDIT_PIPE_UNLOCK(ap);
		error = 0;
		break;

	case FIOSETOWN:
		error = fsetown(*(int *)data, &ap->ap_sigio);
		break;

	case FIOGETOWN:
		*(int *)data = fgetown(&ap->ap_sigio);
		error = 0;
		break;

	case AUDITPIPE_GET_QLEN:
		*(u_int *)data = ap->ap_qlen;