Where does umask get set at system startup? Mine seems to have changed to 0002 recently

[Tom H]

On Thu, Apr 22, 2021 at 2:29 PM Oliver Grawert <ogra at ubuntu.com>
wrote:
> Am Donnerstag, den 22.04.2021, 13:51 +0200 schrieb Tom H:
>> On Wed, Apr 21, 2021 at 10:31 PM Oliver Grawert <ogra at ubuntu.com>
>>>
>>> [1]
>>> https://lists.ubuntu.com/archives/ubuntu-devel-discuss/2020-November/018842.html
>>>
>>> [2] https://bugs.launchpad.net/ubuntu/+source/adduser/+bug/48734
>>
>> This bug/patch is about changing "DIR_MODE=0755" to
>> "DIR_MODE=0750" in "/etc/adduser.conf".
>>
>> Does it change the umask? Or does it only change the mode of
>> "/home/<user>"? Anyway, if it does change the umask, it would be
>> to "027" not to "002".
>
> i think umask was mentioned/discussed in the according discourse
> post [1], but yeah, it was 027 ...
>
> [1]
> https://discourse.ubuntu.com/t/private-home-directories-for-ubuntu-21-04-onwards/19533

Many thanks for the link. It's interesting that for "useradd" to
behave like "adduser", both "HOME_MODE 750" and "UMASK 027" must be
set. The manpage can be understood to imply that this is unintended
because "HOME_MODE" is defined as "The mode for new home directories.
If not specified, the UMASK is used to create the mode."