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Date:	Mon, 22 Apr 2024 01:20:02 +0200
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Subject:	Re: /usr/bin/sg in Cygwin?
To:	cygwin AT cygwin DOT com
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From:	Dan Shelton via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Dan Shelton <dan DOT f DOT shelton AT gmail DOT com>
Sender:	"Cygwin" <cygwin-bounces+archive-cygwin=delorie DOT com AT cygwin DOT com>

On Sat, 20 Apr 2024 at 07:39, Brian Inglis via Cygwin <cygwin AT cygwin DOT com> wrote:
>
> On 2024-04-19 17:47, Dan Shelton via Cygwin wrote:
> > On Fri, 23 Feb 2024 at 22:25, Dan Shelton wrote:
> >> Is there a package which provides /usr/bin/sg (execute shell commands
> >> in a different group)?
>
> The POSIX standard command is newgrp - install cygwin-doc to see Cygwin (and
> newlib libc) man pages (and info, html, PDF docs), man-pages-posix to see POSIX
> man pages, and man-pages-linux if you want to see recent Linux release man pages.
>
> To see possibly relevant commands, run:
>
> $ apropos -s 1,1p group
> chgrp (1)            - change group ownership
> chgrp (1p)           - change the file group ownership
> chown (1)            - change file owner and group
> g3topbm (1)          - convert a Group 3 fax file into a PBM image
> groups (1)           - print the groups a user is in
> id (1)               - print real and effective user and group IDs
> make (1)             - GNU Make utility to maintain groups of programs
> make (1p)            - maintain, update, and regenerate groups of programs
> mkgroup (1)          - Write /etc/group-like output to stdout
> newgrp (1)           - change primary group for a command
> newgrp (1p)          - change to a new group
> pbmtog3 (1)          - convert a PBM image into a Group 3 MH fax file

newgrp(1) is USELESS. It only opens an interactive shell, but does not
allow the user to execute a non-interactive script with the requested
group like bash -c does.

Dan
-- 
Dan Shelton - Cluster Specialist Win/Lin/Bsd

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