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Groups > gnu.bash.bug > #15641

Re: man bash does not list 'in' as a builtin command

From Greg Wooledge <wooledg@eeg.ccf.org>
Newsgroups gnu.bash.bug
Subject Re: man bash does not list 'in' as a builtin command
Date 2019-11-25 16:53 -0500
Message-ID <mailman.2633.1574718792.13325.bug-bash@gnu.org> (permalink)
References <4dc457e0135603025cd500acdc95db53f9d30482.camel@peterbenjamin.com> <20191125215307.GO851@eeg.ccf.org>

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On Mon, Nov 25, 2019 at 01:43:41PM -0800, Peter Benjamin wrote:
> Description:
>  'in' is a builtin command and is not listed in the man page as such.

It's actually a keyword.  It's part of the "for" and "case" syntax.

wooledg:~$ type in
in is a shell keyword

for NAME in WORDS; do ...; done

case WORD in PATTERN) ... ;; esac

I would not recommend attempting to create a command named "in" to use
in shell scripts.  It's bound to get ugly.

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Re: man bash does not list 'in' as a builtin command Greg Wooledge <wooledg@eeg.ccf.org> - 2019-11-25 16:53 -0500

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