[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: process substitution and trailing file descriptors

From: Chet Ramey
Subject: Re: process substitution and trailing file descriptors
Date: Thu, 22 Apr 2010 09:37:38 -0400
User-agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv: Gecko/20100317 Thunderbird/3.0.4

On 2/11/10 6:04 AM, Ian wrote:

>  Basically, by mixing IO redirection and process substitution I'm left
> with a trailing file descriptor which can cause scripts to hang around
> despite any subsequent redirection of stdout/stderr best practices.
> There's no mechanism to discover these new file descriptors and they
> are not closed on exec.

I don't see a good solution to this.  The point of process substitution is
to provide processes in the same parent-child tree a handle to an
arbitrary file descriptor without any advance arrangement.  This is why
the construct expands to a filename, and why it would defeat the purpose
to make them close-on-exec or arrange to close them in child processes.

``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/

reply via email to

[Prev in Thread] Current Thread [Next in Thread]