From: Han Pingtian <hanpt@linux.vnet.ibm.com>
To: zsh-workers@zsh.org
Subject: Re: coproc fd leak leading to possible deadlock
Date: Thu, 7 Mar 2013 14:28:36 +0800 [thread overview]
Message-ID: <20130307062836.GA2676@localhost.localdomain> (raw)
In-Reply-To: <20130306225341.GA12150@chaz.gmail.com>
On Wed, Mar 06, 2013 at 10:53:41PM +0000, Stephane Chazelas wrote:
> Side question: is it possible to close any of the coproc pipes?
> >&p- or <&p- don't work.
>
> If I run another coproc, that closes the current one AFAICT, so I
> can do:
>
> coproc cmd
> exec {i}<&p {o}>&p
> coproc :
> exec {i}<&-
Interesting, I'm glad to know this. Thanks.
>
> as a work around, but I thought there should be a simpler way.
>
> Even when the coproc has terminated, the fds are not closed.
>
> sc% coproc sleep 10
> [1] 14594
> sc% lsof -ad11-20 -p $$
> COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
> zsh 12148 chazelas 11r FIFO 0,8 0t0 295967 pipe
> zsh 12148 chazelas 14w FIFO 0,8 0t0 295968 pipe
> sc%
> [1] + done sleep 10
> sc% lsof -ad11-20 -p $$
> COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
> zsh 12148 chazelas 11r FIFO 0,8 0t0 295967 pipe
> zsh 12148 chazelas 14w FIFO 0,8 0t0 295968 pipe
>
> Having said that, zsh coproc is a lot more usable that bash's or ksh's. At
> least the issues can easily be worked around.
>
> --
> Stephane
next prev parent reply other threads:[~2013-03-07 6:39 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-06 22:53 Stephane Chazelas
2013-03-07 6:28 ` Han Pingtian [this message]
2013-03-07 16:58 ` Bart Schaefer
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