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      1 /*	$NetBSD: oss4_global.c,v 1.1 2021/06/08 18:43:54 nia Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2020-2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nia Alarie.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <errno.h>
     32 #include "internal.h"
     33 
     34 oss_private int
     35 _oss4_global_ioctl(int fd, unsigned long com, void *argp)
     36 {
     37 	int retval = 0;
     38 
     39 	switch (com) {
     40 	/*
     41 	 * These ioctls were added in OSSv4 with the idea that
     42 	 * applications could apply strings to audio devices to
     43 	 * display what they are using them for (e.g. with song
     44 	 * names) in mixer applications. In practice, the popular
     45 	 * implementations of the API in FreeBSD and Solaris treat
     46 	 * these as a no-op and return EINVAL, and no software in the
     47 	 * wild seems to use them.
     48 	 */
     49 	case SNDCTL_SETSONG:
     50 	case SNDCTL_GETSONG:
     51 	case SNDCTL_SETNAME:
     52 	case SNDCTL_SETLABEL:
     53 	case SNDCTL_GETLABEL:
     54 		errno = EINVAL;
     55 		retval = -1;
     56 		break;
     57 	default:
     58 		errno = EINVAL;
     59 		retval = -1;
     60 		break;
     61 	}
     62 	return retval;
     63 }
     64