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Re: Maximum of 9 file descriptors

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From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>
To: JD Ballard <i.am.qix@xxxxxxxxx>
Subject: Re: Maximum of 9 file descriptors
Date: Thu, 23 Jul 2015 15:49:29 -0700
Cc: Zsh hackers list <zsh-workers@xxxxxxx>
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On Thu, Jul 23, 2015 at 10:47 AM, JD Ballard <i.am.qix@xxxxxxxxx> wrote:
> Is there a reason why file descriptors are maxed out at 9?

It's not a descriptor limitation, it's a syntax limitation. The syntax for
">" permits only a single digit to the left.

You can work around it this way:

$ fd=10
$ cat {fd}>/tmp/foo

Although FDs 10,11,12 tend to be used a lot by the shell internally.

References:
- Maximum of 9 file descriptors
  - From: JD Ballard

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