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Corinna Vinschen dc7b67316d Cygwin: uinfo: prefer token primary group 
internal_getlogin overwrites the process token primary group if it
differs from the primary group as stored in the passwd DB.

However, this also overwrites the primary group of the process if
it has been deliberately changed by a former process (e. g., newgrp),
and the current process has a non-Cygwin process as parent.

Our docs claim we restrict overwriting the primary group to local,
non-domain user accounts anyway, and it was actually meant this way.

So check for exactly that before overwriting the primary group
in the token:  It's only allowed if the user is a local account
and the primary group in the token is still the default group
"None".

Fixes: 6cc7c925ce ("(internal_getlogin): Give primary group
from user token more weight.")
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
 		2022-12-02 16:37:33 +01:00
..
CVSChangeLogs.old
…
cygserver Revert "sys/types.h: Don't include sys/_stdint.h" 2022-05-04 15:08:44 +02:00
cygwin Cygwin: uinfo: prefer token primary group 2022-12-02 16:37:33 +01:00
doc Cygwin: uinfo: Drop long disabled nss_prefix and nss_separator 2022-12-02 16:35:31 +01:00
testsuite Cygwin: testsuite: Add x86_64 code to "dynamically load cygwin" test 2022-08-29 17:53:48 +01:00
utils Cygwin: utils: drop 32 bit considerations 2022-10-28 11:37:02 +02:00
CONTRIBUTORS Cygwin: Add Ben Wijen to list of contributors 2021-01-18 12:01:19 +01:00
COPYING
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COPYING.LIB
…
CYGWIN_LICENSE
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Makefile.am Cygwin: Conditionally build documentation 2021-12-17 22:28:16 +00:00
Makefile.am.common Cygwin: automake: change @INCLUDES@ to @AM_CPPFLAGS@ to avoid warnings 2021-04-29 11:28:14 +02:00
README
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acinclude.m4 Cygwin: Reorganize cygwin source dir 2022-08-05 12:02:11 +02:00
autogen.sh Cygwin: autogen.sh: Allow running from any directory 2021-05-06 10:56:20 +02:00
configure.ac Cygwin: fold common.din and x86_64.din into cygwin.din 2022-08-08 17:47:46 +02:00

README 

THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESSED OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

Cygwin documentation is available on the net at https://cygwin.com
You might especially be interested in

https://cygwin.com/faq/faq.html#faq.programming.building-cygwin