Re: [ECOS] [eCos] a question about ROMFS

[Jonathan Larmour <jlarmour at redhat dot com>]

> jjtsai wrote:
> 
> Hi,
>     I have a question about ROM files system.
> 
> [Question Description]
>     A fseek(,,SEEK_CUR) after fread() will cause inconsistency between
> "(CYG_StdioStream) real_stream.position"
>     and "fp->f_offset". See also stream.inl and rom_fs.c.

I believe I understand the problem: the position required by lseek differs
from the stream position, potentially by the number of bytes in the buffer.
In that case your patch is not quite complete to address this problem: what
if you are moving forward 1 byte, ie. fseek(,1, SEEK_CUR), *but* the data
is already in the buffer. For a true stream rather than a file, we should
not flush the input buffer.

I'll see if I can work on a better patch.

Jifl
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