From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: Peter Stephenson <p.stephenson@samsung.com>
Cc: "zsh-workers@zsh.org" <zsh-workers@zsh.org>
Subject: Re: <(...), >(...) and fds above 9
Date: Tue, 2 Jul 2019 16:19:18 +0100 [thread overview]
Message-ID: <20190702151918.iysfgd4tpb37ladw@chaz.gmail.com> (raw)
In-Reply-To: <1562073155.5684.17.camel@samsung.com>
2019-07-02 13:12:35 +0000, Peter Stephenson:
> On Tue, 2019-07-02 at 13:20 +0100, Stephane Chazelas wrote:
> > 2019-07-02 09:59:36 +0100, Peter Stephenson:
> > Note that ksh93 marks the fds above 2 that are open with
> > exec (exec 7< file or exec {fd}< file) with close-on-exec
> > (independently of whether the exec is done in background or
> > not)
>
> This will do that for file descriptors managed with varid or builtins from
> modules, though it doesn't change the behaviour for file descriptors
> managed directly by number. I'm wondering if that's too traditional to
> be worth any pain of changing --- {fd} is a much more manageable
> interface.
[...]
Note that I was not suggesting that zsh should do the same. That
close-on-exec on ksh93 adds more confusion than it helps. No
other shell does it AFAIK. That means that you need to work
around it like:
exec 7<> some-file
...
cmd /dev/fd/7 7>&7
to work around it.
Or make sure to use
{
...
cmd /dev/fd/7
...
} 7<> some-file
And not "exec".
--
Stephane
next prev parent reply other threads:[~2019-07-02 15:20 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190701100058epcas2p25e5f8dbd14d048fe2be1d831f3cf60ab@epcas2p2.samsung.com>
2019-07-01 10:00 ` Stephane Chazelas
2019-07-01 10:08 ` Peter Stephenson
2019-07-01 14:39 ` Bart Schaefer
2019-07-01 15:28 ` Peter Stephenson
2019-07-01 16:22 ` Stephane Chazelas
2019-07-01 16:52 ` Peter Stephenson
2019-07-01 17:00 ` Peter Stephenson
2019-07-01 20:00 ` Stephane Chazelas
2019-07-01 20:06 ` Bart Schaefer
2019-07-02 8:59 ` Peter Stephenson
2019-07-02 12:20 ` Stephane Chazelas
2019-07-02 13:12 ` Peter Stephenson
2019-07-02 15:19 ` Stephane Chazelas [this message]
2019-07-02 15:21 ` Peter Stephenson
2019-07-02 16:43 ` Sebastian Gniazdowski
2019-07-02 18:08 ` Stephane Chazelas
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