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Re: bash leaks sh-np-NNN files and pipes in /tmp/ when command substitut

From: Chet Ramey
Subject: Re: bash leaks sh-np-NNN files and pipes in /tmp/ when command substitution is used
Date: Thu, 12 Dec 2013 10:20:29 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:24.0) Gecko/20100101 Thunderbird/24.1.1

On 12/12/13 8:02 AM, Greg Wooledge wrote:
> On Thu, Dec 12, 2013 at 07:53:32AM +0100, Piotr Grzybowski wrote:
>>  Yuri: I have verified that under linux 3.2.0, bash-4.2.25, nothing of
>> the sort takes place. tee gets /dev/fd/${somefd}, why it is not
>> supported in bsd kernel i have no idea, but I thought it was.
> On OpenBSD, at least, this is true.  I haven't tried FreeBSD.

Unless things have gotten better on FreeBSD, it isn't.  The issue with
FreeBSD is that is has historically only provided /dev/fd/[012], and
that isn't general enough for bash's use.  FIFOs are definitely a
second choice here.


``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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