|Subject:||Re: Leak in BASH "named" file descriptors?|
|Date:||Thu, 28 Jan 2016 13:44:34 -0500|
On 1/27/16 1:18 PM, Mathieu Patenaude wrote:
> When using "named" file descriptors inside a function, the file descriptors
> are not automatically un-linked when the function returns, but when using
> regular "numbered" file descriptors they are automatically "destroyed".
Yes. That's the intent. The idea is that if you assign a variable, you
have a `handle' on the file descriptor and can manage it yourself. It's
closer to how open(2) works: the system selects a descriptor and tells you
what it is, and it's up to you to track it from there.
In that sense, variables assigned by redirections are similar to how
`exec' makes redirections persist beyond a single command.
(I thought this had come up before, but I couldn't find that particular
``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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