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dvbcuse.c
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dvbcuse.c
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/*
* CUSE based DVB loop driver
*
* Copyright (c) 2016 Andreas Steinmetz (ast@domdv.de)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation, version 2.
*
*/
#define FUSE_USE_VERSION 29
#include <linux/dvb/frontend.h>
#include <linux/dvb/dmx.h>
#include <linux/dvb/ca.h>
#include <linux/dvb/net.h>
#include <cuse_lowlevel.h>
#include <fuse_lowlevel.h>
#include <fuse_opt.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <limits.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <stdio.h>
#include <poll.h>
#include <pthread.h>
#include "dvbcuse.h"
typedef struct
{
struct _stream *s;
pthread_mutex_t mtx;
pthread_t th[5];
DVBCUSE_DEVICE conf;
} DATA;
typedef struct _stream
{
struct _stream *next;
int flags;
DATA *dev;
int fd;
} STREAM;
static const struct fuse_opt dvbtvd_opts[]=
{
FUSE_OPT_END
};
static int dvbtvd_args(void *data,const char *arg,int key,
struct fuse_args *outargs)
{
return 1;
}
static void net_post(void *userdata)
{
DATA *dev=(DATA *)userdata;
char devpath[PATH_MAX];
sprintf(devpath,"/dev/dvb/adapter%d/net0",dev->conf.adapter);
chown(devpath,dev->conf.owner,dev->conf.group);
chmod(devpath,dev->conf.perms);
}
static void net_open(fuse_req_t req,struct fuse_file_info *fi)
{
DATA *dev=fuse_req_userdata(req);
STREAM *s;
if(!dev)
{
fuse_reply_err(req,EINVAL);
return;
}
if(!dev->conf.net_open)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(!(s=malloc(sizeof(STREAM))))
{
fuse_reply_err(req,EMFILE);
return;
}
memset(s,0,sizeof(STREAM));
s->flags=fi->flags;
s->dev=dev;
if((s->fd=dev->conf.net_open(dev->conf.user,dev->conf.net_pathname,
fi->flags))==-1)
{
fuse_reply_err(req,errno);
free(s);
return;
}
pthread_mutex_lock(&dev->mtx);
s->next=dev->s;
dev->s=s;
pthread_mutex_unlock(&dev->mtx);
fi->direct_io=1;
fi->keep_cache=0;
fi->nonseekable=1;
fi->fh=(uint64_t)s;
fuse_reply_open(req,fi);
}
static void net_read(fuse_req_t req,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
if((s->flags&O_ACCMODE)==O_WRONLY)fuse_reply_err(req,EPERM);
else fuse_reply_err(req,EOPNOTSUPP);
}
static void net_write(fuse_req_t req,const char *buf,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
if((s->flags&O_ACCMODE)==O_RDONLY)fuse_reply_err(req,EPERM);
else fuse_reply_err(req,EOPNOTSUPP);
}
static void net_flush(fuse_req_t req,struct fuse_file_info *fi)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static void net_release(fuse_req_t req,struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
STREAM **e;
if(!dev->conf.net_close)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
dev->conf.net_close(dev->conf.user,s->fd);
pthread_mutex_lock(&dev->mtx);
for(e=&dev->s;*e;e=&(*e)->next)if(*e==s)
{
*e=s->next;
free(s);
break;
}
pthread_mutex_unlock(&dev->mtx);
fuse_reply_err(req,0);
}
static void net_fsync(fuse_req_t req,int datasync,struct fuse_file_info *fi)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static void net_ioctl(fuse_req_t req,int cmd,void *arg,
struct fuse_file_info *fi,unsigned flags,const void *in_buf,
size_t in_bufsz,size_t out_bufsz)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
struct iovec iov;
union
{
struct dvb_net_if *in;
struct dvb_net_if out;
}u;
if(!dev->conf.net_ioctl)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(flags&FUSE_IOCTL_COMPAT)fuse_reply_err(req,ENOSYS);
else switch(cmd)
{
case NET_REMOVE_IF:
if(dev->conf.net_ioctl(dev->conf.user,s->fd,cmd,NULL)==-1)
fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
break;
case NET_ADD_IF:
if(!in_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(struct dvb_net_if);
fuse_reply_ioctl_retry(req,&iov,1,NULL,0);
}
else
{
u.in=(struct dvb_net_if *)in_buf;
if(dev->conf.net_ioctl(dev->conf.user,s->fd,cmd,u.in)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
}
break;
case NET_GET_IF:
if(!out_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(struct dvb_net_if);
fuse_reply_ioctl_retry(req,NULL,0,&iov,1);
}
else
{
if(dev->conf.net_ioctl(dev->conf.user,s->fd,cmd,&u.out)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,&u.out,
sizeof(struct dvb_net_if));
}
break;
default:
fuse_reply_err(req,EINVAL);
break;
}
}
static void net_poll(fuse_req_t req,struct fuse_file_info *fi,
struct fuse_pollhandle *ph)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static const struct cuse_lowlevel_ops net_ops=
{
.init_done=net_post,
.open=net_open,
.read=net_read,
.write=net_write,
.flush=net_flush,
.release=net_release,
.fsync=net_fsync,
.ioctl=net_ioctl,
.poll=net_poll,
};
static void *networker(void *data)
{
struct cuse_info ci;
DATA *dev=(DATA *)data;
char devpath[PATH_MAX+9];
const char *devarg[1]={devpath};
int dummy_argc=1;
char *dummy_argv[66]={""};
struct fuse_args args=FUSE_ARGS_INIT(dummy_argc,dummy_argv);
sigset_t set;
sigfillset(&set);
pthread_sigmask(SIG_BLOCK,&set,NULL);
if(fuse_opt_parse(&args,NULL,dvbtvd_opts,dvbtvd_args))goto out;
if(fuse_opt_add_arg(&args, "-f"))goto out;
sprintf(devpath,"DEVNAME=dvb/adapter%d/net0",dev->conf.adapter);
memset(&ci,0,sizeof(ci));
ci.dev_major=dev->conf.major;
ci.dev_minor=dev->conf.minbase+4;
ci.dev_info_argc=1;
ci.dev_info_argv=devarg;
ci.flags=CUSE_UNRESTRICTED_IOCTL;
cuse_lowlevel_main(args.argc,args.argv,&ci,&net_ops,data);
out: fuse_opt_free_args(&args);
pthread_exit(NULL);
}
static void ca_post(void *userdata)
{
DATA *dev=(DATA *)userdata;
char devpath[PATH_MAX];
sprintf(devpath,"/dev/dvb/adapter%d/ca0",dev->conf.adapter);
chown(devpath,dev->conf.owner,dev->conf.group);
chmod(devpath,dev->conf.perms);
}
static void ca_open(fuse_req_t req,struct fuse_file_info *fi)
{
DATA *dev=fuse_req_userdata(req);
STREAM *s;
if(!dev)
{
fuse_reply_err(req,EINVAL);
return;
}
if(!dev->conf.ca_open)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(!(s=malloc(sizeof(STREAM))))
{
fuse_reply_err(req,EMFILE);
return;
}
memset(s,0,sizeof(STREAM));
s->flags=fi->flags;
s->dev=dev;
if((s->fd=dev->conf.ca_open(dev->conf.user,dev->conf.ca_pathname,
fi->flags))==-1)
{
fuse_reply_err(req,errno);
free(s);
return;
}
pthread_mutex_lock(&dev->mtx);
s->next=dev->s;
dev->s=s;
pthread_mutex_unlock(&dev->mtx);
fi->direct_io=1;
fi->keep_cache=0;
fi->nonseekable=1;
fi->fh=(uint64_t)s;
fuse_reply_open(req,fi);
}
static void ca_read(fuse_req_t req,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
ssize_t len;
char bfr[131072];
if((s->flags&O_ACCMODE)==O_WRONLY)
{
fuse_reply_err(req,EPERM);
return;
}
if(!dev->conf.ca_read)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if((len=dev->conf.ca_read(dev->conf.user,s->fd,bfr,
size>sizeof(bfr)?sizeof(bfr):size))==-1)
{
fuse_reply_err(req,errno);
return;
}
fuse_reply_buf(req,bfr,len);
}
static void ca_write(fuse_req_t req,const char *buf,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
ssize_t len;
if((s->flags&O_ACCMODE)==O_RDONLY)
{
fuse_reply_err(req,EPERM);
return;
}
if(!dev->conf.ca_write)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if((len=dev->conf.ca_write(dev->conf.user,s->fd,buf,size))==-1)
{
fuse_reply_err(req,errno);
return;
}
fuse_reply_write(req,len);
}
static void ca_flush(fuse_req_t req,struct fuse_file_info *fi)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static void ca_release(fuse_req_t req,struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
STREAM **e;
if(!dev->conf.ca_close)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
dev->conf.ca_close(dev->conf.user,s->fd);
pthread_mutex_lock(&dev->mtx);
for(e=&dev->s;*e;e=&(*e)->next)if(*e==s)
{
*e=s->next;
free(s);
break;
}
pthread_mutex_unlock(&dev->mtx);
fuse_reply_err(req,0);
}
static void ca_fsync(fuse_req_t req,int datasync,struct fuse_file_info *fi)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static void ca_ioctl(fuse_req_t req,int cmd,void *arg,
struct fuse_file_info *fi,unsigned flags,const void *in_buf,
size_t in_bufsz,size_t out_bufsz)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
struct iovec iov;
union
{
ca_caps_t caps;
ca_slot_info_t sinfo;
ca_descr_info_t dinfo;
ca_msg_t mout;
ca_msg_t *min;
ca_descr_t *desc;
ca_pid_t *pid;
}u;
if(!dev->conf.ca_ioctl)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(flags&FUSE_IOCTL_COMPAT)fuse_reply_err(req,ENOSYS);
else switch(cmd)
{
case CA_RESET:
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,NULL)==-1)
fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
break;
case CA_GET_CAP:
if(!out_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_caps_t);
fuse_reply_ioctl_retry(req,NULL,0,&iov,1);
}
else
{
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,&u.caps)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,&u.caps,
sizeof(ca_caps_t));
}
break;
case CA_GET_SLOT_INFO:
if(!out_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_slot_info_t);
fuse_reply_ioctl_retry(req,NULL,0,&iov,1);
}
else
{
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,&u.sinfo)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,&u.sinfo,
sizeof(ca_slot_info_t));
}
break;
case CA_GET_DESCR_INFO:
if(!out_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_descr_info_t);
fuse_reply_ioctl_retry(req,NULL,0,&iov,1);
}
else
{
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,&u.dinfo)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,&u.dinfo,
sizeof(ca_descr_info_t));
}
break;
case CA_GET_MSG:
if(!out_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_msg_t);
fuse_reply_ioctl_retry(req,NULL,0,&iov,1);
}
else
{
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,&u.mout)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,&u.mout,
sizeof(ca_msg_t));
}
break;
case CA_SEND_MSG:
if(!in_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_msg_t);
fuse_reply_ioctl_retry(req,&iov,1,NULL,0);
}
else
{
u.min=(ca_msg_t *)in_buf;
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,u.min)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
}
break;
case CA_SET_DESCR:
if(!in_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_descr_t);
fuse_reply_ioctl_retry(req,&iov,1,NULL,0);
}
else
{
u.desc=(ca_descr_t *)in_buf;
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,u.desc)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
}
break;
case CA_SET_PID:
if(!in_bufsz)
{
iov.iov_base=arg;
iov.iov_len=sizeof(ca_pid_t);
fuse_reply_ioctl_retry(req,&iov,1,NULL,0);
}
else
{
u.pid=(ca_pid_t *)in_buf;
if(dev->conf.ca_ioctl(dev->conf.user,s->fd,cmd,u.pid)
==-1)fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
}
break;
default:
fuse_reply_err(req,EINVAL);
break;
}
}
static void ca_poll(fuse_req_t req,struct fuse_file_info *fi,
struct fuse_pollhandle *ph)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
struct pollfd p;
if(!dev->conf.ca_poll)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
p.fd=s->fd;
p.events=POLLIN;
p.revents=0;
dev->conf.ca_poll(dev->conf.user,&p);
fuse_reply_poll(req,p.revents);
if(p.revents&&ph)fuse_lowlevel_notify_poll(ph);
}
static const struct cuse_lowlevel_ops ca_ops=
{
.init_done=ca_post,
.open=ca_open,
.read=ca_read,
.write=ca_write,
.flush=ca_flush,
.release=ca_release,
.fsync=ca_fsync,
.ioctl=ca_ioctl,
.poll=ca_poll,
};
static void *caworker(void *data)
{
struct cuse_info ci;
DATA *dev=(DATA *)data;
char devpath[PATH_MAX+9];
const char *devarg[1]={devpath};
int dummy_argc=1;
char *dummy_argv[66]={""};
struct fuse_args args=FUSE_ARGS_INIT(dummy_argc,dummy_argv);
sigset_t set;
sigfillset(&set);
pthread_sigmask(SIG_BLOCK,&set,NULL);
if(fuse_opt_parse(&args,NULL,dvbtvd_opts,dvbtvd_args))goto out;
if(fuse_opt_add_arg(&args, "-f"))goto out;
sprintf(devpath,"DEVNAME=dvb/adapter%d/ca0",dev->conf.adapter);
memset(&ci,0,sizeof(ci));
ci.dev_major=dev->conf.major;
ci.dev_minor=dev->conf.minbase+3;
ci.dev_info_argc=1;
ci.dev_info_argv=devarg;
ci.flags=CUSE_UNRESTRICTED_IOCTL;
cuse_lowlevel_main(args.argc,args.argv,&ci,&ca_ops,data);
out: fuse_opt_free_args(&args);
pthread_exit(NULL);
}
static void dvr_post(void *userdata)
{
DATA *dev=(DATA *)userdata;
char devpath[PATH_MAX];
sprintf(devpath,"/dev/dvb/adapter%d/dvr0",dev->conf.adapter);
chown(devpath,dev->conf.owner,dev->conf.group);
chmod(devpath,dev->conf.perms);
}
static void dvr_open(fuse_req_t req,struct fuse_file_info *fi)
{
DATA *dev=fuse_req_userdata(req);
STREAM *s;
if(!dev)
{
fuse_reply_err(req,EINVAL);
return;
}
if(!dev->conf.dvr_open)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(!(s=malloc(sizeof(STREAM))))
{
fuse_reply_err(req,EMFILE);
return;
}
memset(s,0,sizeof(STREAM));
s->flags=fi->flags;
s->dev=dev;
if((s->fd=dev->conf.dvr_open(dev->conf.user,dev->conf.dvr_pathname,
fi->flags))==-1)
{
fuse_reply_err(req,errno);
free(s);
return;
}
pthread_mutex_lock(&dev->mtx);
s->next=dev->s;
dev->s=s;
pthread_mutex_unlock(&dev->mtx);
fi->direct_io=1;
fi->keep_cache=0;
fi->nonseekable=1;
fi->fh=(uint64_t)s;
fuse_reply_open(req,fi);
}
static void dvr_read(fuse_req_t req,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
ssize_t len;
char bfr[131072];
if((s->flags&O_ACCMODE)==O_WRONLY)
{
fuse_reply_err(req,EPERM);
return;
}
if(!dev->conf.dvr_read)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if((len=dev->conf.dvr_read(dev->conf.user,s->fd,bfr,
size>sizeof(bfr)?sizeof(bfr):size))==-1)
{
fuse_reply_err(req,errno);
return;
}
fuse_reply_buf(req,bfr,len);
}
static void dvr_write(fuse_req_t req,const char *buf,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
ssize_t len;
if((s->flags&O_ACCMODE)==O_RDONLY)
{
fuse_reply_err(req,EPERM);
return;
}
if(!dev->conf.dvr_write)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if((len=dev->conf.dvr_write(dev->conf.user,s->fd,buf,size))==-1)
{
fuse_reply_err(req,errno);
return;
}
fuse_reply_write(req,len);
}
static void dvr_flush(fuse_req_t req,struct fuse_file_info *fi)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static void dvr_release(fuse_req_t req,struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
STREAM **e;
if(!dev->conf.dvr_close)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
dev->conf.dvr_close(dev->conf.user,s->fd);
pthread_mutex_lock(&dev->mtx);
for(e=&dev->s;*e;e=&(*e)->next)if(*e==s)
{
*e=s->next;
free(s);
break;
}
pthread_mutex_unlock(&dev->mtx);
fuse_reply_err(req,0);
}
static void dvr_fsync(fuse_req_t req,int datasync,struct fuse_file_info *fi)
{
fuse_reply_err(req,EOPNOTSUPP);
}
static void dvr_ioctl(fuse_req_t req,int cmd,void *arg,
struct fuse_file_info *fi,unsigned flags,const void *in_buf,
size_t in_bufsz,size_t out_bufsz)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
if(!dev->conf.dvr_ioctl)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(flags&FUSE_IOCTL_COMPAT)fuse_reply_err(req,ENOSYS);
else switch(cmd)
{
case DMX_SET_BUFFER_SIZE:
if(dev->conf.dvr_ioctl(dev->conf.user,s->fd,cmd,arg)==-1)
fuse_reply_err(req,errno);
else fuse_reply_ioctl(req,0,NULL,0);
break;
default:
fuse_reply_err(req,EINVAL);
break;
}
}
static void dvr_poll(fuse_req_t req,struct fuse_file_info *fi,
struct fuse_pollhandle *ph)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
struct pollfd p;
if(!dev->conf.dvr_poll)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
p.fd=s->fd;
p.events=POLLIN;
p.revents=0;
dev->conf.dvr_poll(dev->conf.user,&p);
fuse_reply_poll(req,p.revents);
if(p.revents&&ph)fuse_lowlevel_notify_poll(ph);
}
static const struct cuse_lowlevel_ops dvr_ops=
{
.init_done=dvr_post,
.open=dvr_open,
.read=dvr_read,
.write=dvr_write,
.flush=dvr_flush,
.release=dvr_release,
.fsync=dvr_fsync,
.ioctl=dvr_ioctl,
.poll=dvr_poll,
};
static void *dvrworker(void *data)
{
struct cuse_info ci;
DATA *dev=(DATA *)data;
char devpath[PATH_MAX+9];
const char *devarg[1]={devpath};
int dummy_argc=1;
char *dummy_argv[66]={""};
struct fuse_args args=FUSE_ARGS_INIT(dummy_argc,dummy_argv);
sigset_t set;
sigfillset(&set);
pthread_sigmask(SIG_BLOCK,&set,NULL);
if(fuse_opt_parse(&args,NULL,dvbtvd_opts,dvbtvd_args))goto out;
if(fuse_opt_add_arg(&args, "-f"))goto out;
sprintf(devpath,"DEVNAME=dvb/adapter%d/dvr0",dev->conf.adapter);
memset(&ci,0,sizeof(ci));
ci.dev_major=dev->conf.major;
ci.dev_minor=dev->conf.minbase+2;
ci.dev_info_argc=1;
ci.dev_info_argv=devarg;
ci.flags=CUSE_UNRESTRICTED_IOCTL;
cuse_lowlevel_main(args.argc,args.argv,&ci,&dvr_ops,data);
out: fuse_opt_free_args(&args);
pthread_exit(NULL);
}
static void dmx_post(void *userdata)
{
DATA *dev=(DATA *)userdata;
char devpath[PATH_MAX];
sprintf(devpath,"/dev/dvb/adapter%d/demux0",dev->conf.adapter);
chown(devpath,dev->conf.owner,dev->conf.group);
chmod(devpath,dev->conf.perms);
}
static void dmx_open(fuse_req_t req,struct fuse_file_info *fi)
{
DATA *dev=fuse_req_userdata(req);
STREAM *s;
if(!dev)
{
fuse_reply_err(req,EINVAL);
return;
}
if(!dev->conf.dmx_open)
{
fuse_reply_err(req,EOPNOTSUPP);
return;
}
if(!(s=malloc(sizeof(STREAM))))
{
fuse_reply_err(req,EMFILE);
return;
}
memset(s,0,sizeof(STREAM));
s->flags=fi->flags;
s->dev=dev;
if((s->fd=dev->conf.dmx_open(dev->conf.user,dev->conf.dmx_pathname,
fi->flags))==-1)
{
fuse_reply_err(req,errno);
free(s);
return;
}
pthread_mutex_lock(&dev->mtx);
s->next=dev->s;
dev->s=s;
pthread_mutex_unlock(&dev->mtx);
fi->direct_io=1;
fi->keep_cache=0;
fi->nonseekable=1;
fi->fh=(uint64_t)s;
fuse_reply_open(req,fi);
}
static void dmx_read(fuse_req_t req,size_t size,off_t off,
struct fuse_file_info *fi)
{
STREAM *s=(STREAM *)fi->fh;
DATA *dev=s->dev;
ssize_t len;
char bfr[131072];
if((s->flags&O_ACCMODE)==O_WRONLY)
{
fuse_reply_err(req,EPERM);
return;
}
if(!dev->conf.dmx_read)
{
fuse_reply_err(req,EOPNOTSUPP);