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Date: Sun, 28 Aug 2005 14:41:45 +0300
From: Pavel Tsekov <ptsekov@gmx.net>
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To: cygwin@cygwin.com
Subject: Re: zsh: command not found => hangs
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References: <20050823205318.GF6716@bouh.ens-lyon.fr>    <Pine.LNX.4.60.0508241620460.19032@gremlin.fruitbat.org>    <20050825001137.GI7338@bouh.ens-lyon.fr> <Pine.LNX.4.60.0508251406580.19032@gremlin.fruitbat.org>    <20050825220454.GR7662@bouh.ens-lyon.fr> <Pine.LNX.4.60.0508251537490.19032@gremlin.fruitbat.org>    <20050826005349.GA4087@trixie.casa.cgf.cx> <Pine.LNX.4.60.0508261033310.19032@gremlin.fruitbat.org>    <20050826191429.GA2034@trixie.casa.cgf.cx> <Pine.LNX.4.60.0508261329430.19032@gremlin.fruitbat.org>  <Pine.CYG.4.58.0508281417030.624@mordor>
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Hello,

On Sun, 28 Aug 2005, Pavel Tsekov wrote:

> First I determined (by using strace) the place in zsh where the hang
> occurs to be in or after zhandler() when it processes SIGCLD. Then I
> built debugging zsh and after debugging for a while it turned out that
> the hang occures after leaving the signal handler.

Some things I forget to mention. zsh is supposed to be sigsuspend-ed at
the time the signal handler is executed - this maybe obvious from the
backtrace but in any case I mention it. The second thing is that I was
able to reproduce this when connected via ssh to the Cygwin machine or
when I run zsh in rxvt window but not when in Cygwin console. Maybe pty
slows things a bit and that's why the "race" surfaces in these cases.


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