Re: [ECOS] sdtin/stdout/stderr redirection

[Philippe Vandermersch <phil at equator dot com>]

Jifl,

You are right. It is opened in full buffering mode. A call to 
setvbuf(stdout, NULL, _IOLBF, BUFSIZ) works
Thanks.

Another question:
Why the open mode #define like O_CREAT, O_RD_ONLY..... are not the same 
definition than in Linux
Same question for the st_mode in struct stat  (VxWorks and Linux has the 
same definition)
It would make my life easier.....

I notice that eCos manage the binary mode for fopen but somehow it is 
lost along the road when calling open (which triggers my filesystem 
rpcfs_open routine)
Is there any intention to define O_BINARY

Phil.

Jonathan Larmour wrote:

> Philippe Vandermersch wrote:
>
> > Jifl.
> >
> > I liked your proposal because I do not have to deal with C++ but :
> >
> > 1)
> > fclose( stdout ) failed :
> > ASSERT FAIL: <4>dlmalloc.cxx[765]do_check_chunk() (cyg_uint8 *)p >= 
> > arenabase
> > ASSERT FAIL: <4>dlmalloc.cxx [ 765] do_check_chunk() (cyg_uint8 *)p 
> > >= arenabase
> > TRACE: <4>sched.cxx [ 705] disinherit_priority() }}RETURNING UNSET!
> > TRACE: <4>mutex.cxx [ 447] unlock()
>
>
> Bugger, I forgot about that. fclose() is trying to free stdin, but 
> stdin was not allocated off the heap.
>
> > 2)
> > If I do not close it and do simply : stdout = fdopen(fd_out , "w" ) 
> > seems to succeed but printf does print anything
>
>
> Ah... my guess is that the default buffering mode is full buffering, 
> not line buffering, so you would have to set the buffering mode to 
> _IOLBF with setvbuf().
>
> If it's not that I'm afraid I don't know off-hand what it could be. 
> fdopen() calles fopen_inner() in fopen.cxx, which calls a constructor 
> just like you do below.

> > 3)
> > To make it work, I had to do this in C++:
> >
> > Cyg_StdioStream *StdoutStream = new Cyg_StdioStream( fd_out, 
> > Cyg_StdioStream::CYG_STREAM_WRITE, false, false, _IOLBF );
> > if(StdoutStream == NULL) return( ENOMEM );
> > stdout = (FILE *)StdoutStream;
> >
> > It also works for stdin,stderr.
>
>
> That's good. Although if you had a moment, it would be nice if you 
> could have a quick poke around to see why 2) didn't work, and in 
> particular if using setvbuf(stdout, NULL, _IOLBF, BUFSIZ); is all it 
> takes.
>
> Jifl





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