Re: [ProgSoc] I can't get smoke out of my pipe

[Donny Yap <yap@nospam.progsoc.uts.edu.au>]

On Sun, 3 May 1998, vlrajews@nospam.acs.itd.uts.edu.au wrote:

> Can anybody explain why the following simple program does not work:

[ code snipped ]


fprintf writes to a buffer, which is only written to the stream when the
buffer is flushed.  Using "close" does not flush the buffer, so that is
why s appears empty.

You'll either want to use fflush(b) - to make sure "foo foo foo \n" is
written to the stream before you read from it, or use "fclose(b)", which
flushes the buffer before closing the stream.


>    write(p[1],"ZXCZXCZXCZXC", 10);
> This time, lo and behold, it worked. Can someone explain why the original
> program does not work?

"write" writes directly to your pipe... no buffer involved


-yap

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