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/* $OpenBSD: sioctl.c,v 1.2 2021/11/01 14:43:24 ratchov Exp $ */
/*
* Copyright (c) 2014-2020 Alexandre Ratchov <alex@caoua.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <poll.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "debug.h"
#include "sioctl_priv.h"
struct sioctl_hdl *
sioctl_open(const char *str, unsigned int mode, int nbio)
{
static char devany[] = SIO_DEVANY;
struct sioctl_hdl *hdl;
#ifdef DEBUG
_sndio_debug_init();
#endif
if (str == NULL) /* backward compat */
str = devany;
if (strcmp(str, devany) == 0 && !issetugid()) {
str = getenv("AUDIODEVICE");
if (str == NULL)
str = devany;
}
if (strcmp(str, devany) == 0) {
hdl = _sioctl_aucat_open("snd/default", mode, nbio);
if (hdl != NULL)
return hdl;
return _sioctl_sun_open("rsnd/0", mode, nbio);
}
if (_sndio_parsetype(str, "snd"))
return _sioctl_aucat_open(str, mode, nbio);
if (_sndio_parsetype(str, "rsnd"))
return _sioctl_sun_open(str, mode, nbio);
DPRINTF("sioctl_open: %s: unknown device type\n", str);
return NULL;
}
void
_sioctl_create(struct sioctl_hdl *hdl, struct sioctl_ops *ops,
unsigned int mode, int nbio)
{
hdl->ops = ops;
hdl->mode = mode;
hdl->nbio = nbio;
hdl->eof = 0;
hdl->ctl_cb = NULL;
}
int
_sioctl_psleep(struct sioctl_hdl *hdl, int event)
{
struct pollfd pfds[SIOCTL_MAXNFDS];
int revents, nfds;
for (;;) {
nfds = sioctl_pollfd(hdl, pfds, event);
if (nfds == 0)
return 0;
while (poll(pfds, nfds, -1) < 0) {
if (errno == EINTR)
continue;
DPERROR("sioctl_psleep: poll");
hdl->eof = 1;
return 0;
}
revents = sioctl_revents(hdl, pfds);
if (revents & POLLHUP) {
DPRINTF("sioctl_psleep: hang-up\n");
return 0;
}
if (event == 0 || (revents & event))
break;
}
return 1;
}
void
sioctl_close(struct sioctl_hdl *hdl)
{
hdl->ops->close(hdl);
}
int
sioctl_nfds(struct sioctl_hdl *hdl)
{
return hdl->ops->nfds(hdl);
}
int
sioctl_pollfd(struct sioctl_hdl *hdl, struct pollfd *pfd, int events)
{
if (hdl->eof)
return 0;
return hdl->ops->pollfd(hdl, pfd, events);
}
int
sioctl_revents(struct sioctl_hdl *hdl, struct pollfd *pfd)
{
if (hdl->eof)
return POLLHUP;
return hdl->ops->revents(hdl, pfd);
}
int
sioctl_eof(struct sioctl_hdl *hdl)
{
return hdl->eof;
}
int
sioctl_ondesc(struct sioctl_hdl *hdl,
void (*cb)(void *, struct sioctl_desc *, int), void *arg)
{
hdl->desc_cb = cb;
hdl->desc_arg = arg;
return hdl->ops->ondesc(hdl);
}
int
sioctl_onval(struct sioctl_hdl *hdl,
void (*cb)(void *, unsigned int, unsigned int), void *arg)
{
hdl->ctl_cb = cb;
hdl->ctl_arg = arg;
return hdl->ops->onctl(hdl);
}
void
_sioctl_ondesc_cb(struct sioctl_hdl *hdl,
struct sioctl_desc *desc, unsigned int val)
{
if (desc) {
DPRINTF("_sioctl_ondesc_cb: %u -> %s[%d].%s=%s[%d]:%d\n",
desc->addr,
desc->node0.name, desc->node0.unit,
desc->func,
desc->node1.name, desc->node1.unit,
val);
}
if (hdl->desc_cb)
hdl->desc_cb(hdl->desc_arg, desc, val);
}
void
_sioctl_onval_cb(struct sioctl_hdl *hdl, unsigned int addr, unsigned int val)
{
DPRINTF("_sioctl_onval_cb: %u -> %u\n", addr, val);
if (hdl->ctl_cb)
hdl->ctl_cb(hdl->ctl_arg, addr, val);
}
int
sioctl_setval(struct sioctl_hdl *hdl, unsigned int addr, unsigned int val)
{
if (!(hdl->mode & SIOCTL_WRITE))
return 0;
return hdl->ops->setctl(hdl, addr, val);
}
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