Re: and _PC_PIPE_BUF..

[Robert Millan]

On Wed, Apr 23, 2003 at 10:24:28PM +0200, Robert Millan wrote:
> 
> 
> one more thing, it appears to me that fpathconf(fd, _PC_PIPE_BUF) is
> always -1 for files, and has a positive value for pipes, fifos and
> sockets. is that it? (for GNU and for any system)

i'd better show an example, this is fixed code from gs. does it seem
correct to you? (considering the file descriptor is expected to be
a socket, if pipe_buf is -1 then something weird happened)

/* Get packet from the server. */
private int hpijs_get_pk(PK * pk, int fd)
{
#ifdef PIPE_BUF
   return read(fd, pk, PIPE_BUF - 1);
#else
   long int pipe_buf = fpathconf(fd, _PC_PIPE_BUF);
   if (pipe_buf == -1)
     /* no pipe_buf, so we fail */
     return -1;
   else
     return read(fd, pk, pipe_buf - 1);
#endif
}

-- 
Robert Millan

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