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To: Sane_Purushottam@emc.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: fork and pthreads
In-Reply-To: <93F527C91A6ED411AFE10050040665D0560664@corpusmx1.us.dg.com>
From: Doug McNaught <doug@wireboard.com>
Date: 16 Mar 2001 12:23:15 -0500
In-Reply-To: Sane_Purushottam@emc.com's message of "Fri, 16 Mar 2001 11:34:04 -0500"
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Sane_Purushottam@emc.com writes:

> I am having a strange problem.
> 
> I have a big daemon program to which I am trying to add multi-threading.
> 
> At the begining, after some sanity check, this program does a double fork to
> create a deamon.
> 
> After that it listens for the client on the port. Whenever the client
> connects, it creates a new thread using
> pthread-create.
> 
> The problem is, the thread (main thread) calling pthread-create hangs
> indefinetely in __sigsuspend. The newly created thread however, runs
> normally to completion.

Just a guess--are you calling setsid() to establish a new session?
Omitting this *might* cause signal-delivery problems in pthreads.

-Doug
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