From owner-freebsd-questions  Wed Jun 27 19:44:57 2001
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Date: Thu, 28 Jun 2001 12:14:35 +0930 (CST)
From: "Daniel O'Connor" <doconnor@gsoft.com.au>
To: Manas Bhatt <bhatt_manas@yahoo.com>
Subject: RE: does data overflow in pipes
Cc: questions@FreeBSD.ORG
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On 28-Jun-2001 Manas Bhatt wrote:
>  hi all,
>       pipes uses only direct blocks to store data. so
>  depending on the blocksize , a total data of
>  10*blocksize can be written in one go but what happens
>  if a writer process tries to write more 10*blocksize
>  of data in one go. Does the kernel overwrites the 
>  data  in pipe or not ? if yes, why? if not, then how
>  does it allow the writer to write more 10*blocksize of
>  data?
>       if someone can direct me to implementation
>  (source files), it would be great.

This is a questions post I think.

If it is blocking IO the writer will block until some data is read from the
pipe, if it is non blocking then it will return a short write.

---
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
  -- Andrew Tanenbaum

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