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Date: Wed, 11 Feb 2015 20:47:09 +0000
From: Stephane Chazelas <stephane.chazelas@gmail.com>
To: zsh-users@zsh.org
Subject: Re: multi-digit file descriptors
Message-ID: <20150211204708.GA10940@chaz.gmail.com>
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References: <20150211162637.GA9083__22180.4416658872$1423672129$gmane$org@xvii.vinc17.org>
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User-Agent: Mutt/1.5.21 (2010-09-15)

2015-02-11 17:26:37 +0100, Vincent Lefevre:
> Contrary to bash and mksh, zsh doesn't support file descriptors with
> multiple digits. Considered the following file "redir".
> 
> ----------------------------------------
> ( echo foo >&9; ) 9>my_file
> cat my_file
> 
> ( echo bar >&10; ) 10>my_file
> cat my_file
> ----------------------------------------
> 
> xvii% bash redir
> foo
> bar
> xvii% mksh redir
> foo
> bar
> xvii% zsh redir
> foo
> redir:4: parse error near `10'
> 
> The behavior of dash and ksh93 is similar to zsh. But is there any
> reason?
> 
> BTW, POSIX doesn't seem to restrict file descriptors to 1 digit.
[...]

Related discussion on the austin-group mailing list:

http://thread.gmane.org/gmane.comp.standards.posix.austin.general/10094

-- 
Stephane