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Re: SO_NOSIGPIPE option.
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Re: SO_NOSIGPIPE option.


  • Subject: Re: SO_NOSIGPIPE option.
  • From: Robert Bell <email@hidden>
  • Date: Wed, 07 Oct 2009 15:20:36 -0700


Ty Glenn! Very useful info.!

-R

Envoyé de mon iPhone

Le 7 oct. 2009 à 14:27, Glenn Anderson <email@hidden> a écrit :

At 12:27 pm -0700 7/10/2009, Robert Bell wrote:
Hi all,

I was recently recommended to use the SO_NOSIGPIPE option to avoid signals on a Mac OS X based system. I have noticed though that this seems to work fine on Mac OS 10.6, but when run on 10.5.8 (have not checked other versions), the socket still generates SIGPIPE.

One problem I ran in to with 10.5 is that setsockopt for SO_NOSIGPIPE changed from 10.4 and earlier and no longer works if the socket is already closed. This means that if the socket closes before your code gets a chance to call setsockopt, you don't check if setsockopt failed, and you write to the socket, that will generate a SIGPIPE.


As timing is usually involved to end up in a situation where the socket has closed before the call to setsockopt, this can result in hard to reproduce problems.

It is also possible the behavior of setsockopt for SO_NOSIGPIPE on a closed socket has changed back again under 10.6, I haven't tried it myself.

Glenn.
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References: 
 >SO_NOSIGPIPE option. (From: Robert Bell <email@hidden>)
 >Re: SO_NOSIGPIPE option. (From: Glenn Anderson <email@hidden>)

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