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From: "Chris F.A. Johnson" <chris@cfajohnson.com>
Newsgroups: gnu.bash.bug
Subject: Re: man bash does not list 'in' as a builtin command
Date: Mon, 25 Nov 2019 16:54:01 -0500 (EST)
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On Mon, 25 Nov 2019, Peter Benjamin wrote:

> Configuration Information [Automatically generated, do not change]:
> Machine: x86_64
> OS: linux-gnu
> Compiler: gcc
> Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='x86_64'
> -DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='x86_64-pc-linux-gnu'
> -DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash'
> -DSHELL -DHAVE_CONFIG_H   -I.  -I../. -I.././include -I.././lib  -
> Wdate-time -D_FORTIFY_SOURCE=2 -g -O2 -fdebug-prefix-map=/build/bash-
> N2nMjo/bash-4.4.18=. -fstack-protector-strong -Wformat -Werror=format-
> security -Wall -Wno-parentheses -Wno-format-security
> uname output: Linux Precision 4.15.0-70-generic #79-Ubuntu SMP Tue Nov
> 12 10:36:11 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
> Machine Type: x86_64-pc-linux-gnu
>
> Bash Version: 4.4
> Patch Level: 20
> Release Status: release
>
> Description:
> 'in' is a builtin command and is not listed in the man page as such.

$ type in
in is a shell keyword


-- 
    Chris F.A. Johnson                         <http://cfajohnson.com/>
    =========================== Author: ===============================
    Shell Scripting Recipes: A Problem-Solution Approach (2005, Apress)
    Pro Bash Programming: Scripting the GNU/Linux shell (2009, Apress)