Re: Bug in libpcap: savefile.c / get_selectable_fd()

[Guy Harris <guy () alum mit edu>]

On Mar 17, 2009, at 4:38 PM, Guy Harris wrote:

> If that means that you can't tell the difference between "end of  
> file on the pipe", "no more packets available right now", and "an  
> error occurred while reading from the pipe", as might be the case,  
> file a bug on that.

This will almost certainly be the case.  The code path for reading in  
blocking mode (when running an ordinary command such as tcpdump,  
reading from a file or from its standard input in a pipeline) should  
be buffered and should, if possible, avoid doing extra work to cope  
with partial reads; the code path for reading in non-blocking mode  
should also be buffered (so that you get as much data as possible from  
a single read call) but should be able to cope with partial reads.   
File a bug on that.
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