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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1992-2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stropts.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <AudioDevicectl.h>
// class AudioDevicectl methods
// Constructor with optional path argument
AudioDevicectl::
AudioDevicectl(
const char *path): // filename
AudioDevice(path, (FileAccess)ReadWrite)
{
}
// Enable/disable SIGPOLL on state changes
AudioError AudioDevicectl::
SetSignal(
Boolean on) // True to enable
{
// Set the streams flag
if (ioctl(getfd(), I_SETSIG, (on ? S_MSG : 0)) < 0)
return (RaiseError(AUDIO_UNIXERROR));
return (AUDIO_SUCCESS);
}
// Get input encoding
AudioHdr AudioDevicectl::
GetReadHeader()
{
clearhdr();
return (AudioDevice::GetReadHeader());
}
// Open an audio control device with the given name and mode
AudioError AudioDevicectl::
tryopen(
const char *devname,
int)
{
struct stat st;
char *ctlname;
int desc;
AudioInfo info;
AudioError err;
// If the name is changing, set the new one
if (devname != GetName())
SetName(devname);
// XXX - convert name to device name, using audio config file
// For now, append "ctl" to the device name
ctlname = new char[strlen(devname) + 4];
(void) strcpy(ctlname, devname);
(void) strcat(ctlname, "ctl");
// Check and open the control device.
err = AUDIO_SUCCESS;
if (stat(ctlname, &st) < 0) {
err = AUDIO_UNIXERROR;
} else if (!S_ISCHR(st.st_mode)) {
err = AUDIO_ERR_NOTDEVICE;
} else if ((desc = open(ctlname, O_RDWR)) < 0) {
err = AUDIO_UNIXERROR;
}
delete ctlname;
if (err)
return (err);
// Set the file descriptor (this marks the file open)
setfd(desc);
err = GetState(info);
if (err != AUDIO_SUCCESS) {
(void) close(desc);
setfd(-1);
return (err);
}
// Get the device type
decode_devtype();
return (AUDIO_SUCCESS);
}
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