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Re: OSDL DBT-2 w/ PostgreSQL 7.3.4 and 7.4beta5

From: Manfred Spraul <manfred(at)colorfullife(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: markw(at)osdl(dot)org, pgsql-hackers(at)postgresql(dot)org,osdldbt-general(at)lists(dot)sourceforge(dot)net
Subject: Re: OSDL DBT-2 w/ PostgreSQL 7.3.4 and 7.4beta5
Date: 2003-11-01 19:10:42
Message-ID: 3FA40532.2050802@colorfullife.com (view raw or flat)
Thread:
Lists: pgsql-hackers
Tom Lane wrote:

>Manfred Spraul <manfred(at)colorfullife(dot)com> writes:
>  
>
>>signal handlers are a process property, not a thread property - that 
>>code is broken for multi-threaded apps.
>>    
>>
>
>Yeah, that's been mentioned before, but I don't see any way around it.
>
Do not handle SIGPIPE on multithreaded apps, and ask the caller to do 
that? The current code doesn't block SIGPIPE reliably, which makes it 
totally useless (except that it's a debugging nightmare, because 
triggering it depends on the right timing).

>What we really want is to turn off SIGPIPE delivery on our socket
>(only), but AFAIK there is no API to do that.
>  
>
Linux has as MSG_NOSIGNAL flag for send(), but that seems to be Linux 
specific.

--
    Manfred


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