Re: man7 - useradd query

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Hi Rituparna,

On Thu, Oct 12, 2023 at 08:24:13PM +0530, Rituparna ghosh wrote:
> Hello
> I am not sure if this is the right place to raise this concern I have from
> man7 https://man7.org/linux/man-pages/man8/useradd.8.html

That page says it belongs to the shadow project, not to the Linux
man-pages project

COLOPHON         top

       This page is part of the shadow-utils (utilities for managing
       accounts and shadow password files) project.  Information about
       the project can be found at 
       ⟨https://github.com/shadow-maint/shadow⟩;.  If you have a bug
       report for this manual page, send it to
       pkg-shadow-devel@xxxxxxxxxxxxxxxxxxxxxxx.  This page was obtained
       from the project's upstream Git repository
       ⟨https://github.com/shadow-maint/shadow⟩; on 2023-06-23.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-06-22.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to
       man-pages@xxxxxxxx

I've CCed the mailing list for shadow, although the project is more
active on GitHub, in the link above.  I've also CCed Iker, a shadow
maintainer from Red Hat.

> 
> The useradd command here is showing an option   -F which is shown as
> invalid in RH 8.8 or RH 9.
> Is this correct?

From what I see in the source code of useradd.c in shadow, the feature
is compiled conditionally, #ifdef ENABLE_SUBIDS.  It may be that RHEL,
or your version, doesn't build with that option; I ignore it, I'm a
Debian user.

alx@debian:~/src/shadow/shadow/master$ grep -rl add.subids.for.system
man/useradd.8.xml
po/fr.po
tests/run_all.coverage
tests/run_all
src/useradd.c
alx@debian:~/src/shadow/shadow/master$ grep -rn -C1 add.subids.for.system src/
src/useradd.c-954-#ifdef ENABLE_SUBIDS
src/useradd.c:955:	(void) fputs (_("  -F, --add-subids-for-system   add entries to sub[ud]id even when adding a system user\n"), usageout);
src/useradd.c-956-#endif
--
src/useradd.c-1245-#ifdef ENABLE_SUBIDS
src/useradd.c:1246:			{"add-subids-for-system", no_argument,NULL, 'F'},
src/useradd.c-1247-#endif

Cheers,
Alex

-- 
<https://www.alejandro-colomar.es/>

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