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exec {_Dbg_new_fd}<>&-

X-seq: zsh-workers 26133
From: "Rocky Bernstein" <rocky.bernstein@xxxxxxxxx>
To: "Zsh hackers list" <zsh-workers@xxxxxxxxxx>
Subject: exec {_Dbg_new_fd}<>&-
Date: Thu, 11 Dec 2008 20:09:50 -0500
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In all of the terminal detection stuff I noticed that running script
bug.zsh with this contents:

exec {_Dbg_fd}<>$TTY
exec {_Dbg_fd}<>&-

prints this:
  bug.zsh:2: parse error near `&'

I think this agrees with ksh93t

However if I change the offending line to:
  exec {_Dbg_fd}<&-
  exec {_Dbg_fd}>&-

I get:


bug.zsh:3: file descriptor 12 out of range, not closed. And ksh
doesn't seem to complain.
I gather that closing _Dbg_fd for input also closes it for output.

Is this the expected or okay?

Thanks.

Follow-Ups:
- Re: exec {_Dbg_new_fd}<>&-
  - From: Peter Stephenson

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