User:Przemoc/Todo/Users and groups for AL 3.4

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Revision as of 16:48, 20 June 2016 by Przemoc (talk | contribs) (Update)
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What I want to do for AL.

Users and groups

Pre-install/upgrade scripts


Make all packages create only system users and groups

(MOSTLY DONE) Call adduser and addgroup with -S option in pre-install/upgrade scripts. It's mostly done already and only mostly, because 1) some new packages might have been added that aren't using -S yet and 2) it introduced problems, which aren't fully fixed yet.


System user creation doesn't add same named group and uses nogroup as primary group unless explicitly specified via -G.

It means that system user creation (adduser with -S option present) differs from normal user creation (adduser without -S option) in more ways than the range of used UIDs and the default GECOS field.

Normal user, when created via adduser, gets its own automatically created group, and this group becomes primary group of that user. Group creation can be avoided if -G option is used, but then already existing group has to be provided there.

System user, when created via adduser, never gets its own automatically created group and by default primary group of that user becomes group called nogroup, unless -G option is used to provide other already existing group.

My commit:

* ccc056dbf9d3 Add lacking -S option (system) to adduser/addgroup in scripts. (2016-04-25)

It was part of patch set:


Fix problems introduced by adding -S to adduser

(MOSTLY DONE) I somehow overlooked different adduser behavior explained in above note and thus my sole adding of -S to adduser calls in commit ccc056dbf9d3 (i.e. without proper -G option and preceding addgroup call when needed) proved to be drastic in effects, i.e. status quo has not been preserved, because primary groups of those users in new Alpine Linux installations has been changed. Alpine Linux 3.4.0 is affected by this.

Lesson relearned. Beware of such small and allegedly "cosmetic" changes!

Pre-install/upgrade scripts are already mostly fixed in master branch of aports repository.

Packages creating users that were badly touched by commit ccc056dbf9d3 and should have been already fixed:

  • community/caddy
  • community/domoticz
  • community/oscam
  • community/syncthing
  • main/apache2
  • main/aports-build
  • main/atheme-iris
  • main/clamav
  • main/clamsmtp
  • main/coova-chilli
  • main/dhcp
  • main/djbdns
  • main/dovecot
  • main/ez-ipupdate
  • main/fetchmail
  • main/freeswitch
  • main/gitolite
  • main/gnats
  • main/gross
  • main/icecast
  • main/lighttpd
  • main/memcached
  • main/ngircd
  • main/nrpe
  • main/openntpd
  • main/postgrey
  • main/snort
  • main/squid
  • main/transmission
  • main/znc
  • testing/at
  • testing/dbmail
  • testing/dspam
  • testing/opensips
  • testing/pdns
  • testing/qpage
  • testing/rrdbot
  • testing/wt

My commits fixing them are:

* 1de4b02204f7 main/lighttpd: Fix lighttpd user's primary group. (2016-06-03)
* f27dface22b3 testing/at: Properly set primary group in .pre-install. (2016-06-07)
* 40521bdafd3c main/dovecot: Properly set primary group in .pre-install. (2016-06-07)
* 3c1fa46624bd main/{npre, postgrey}: Properly set primary group in .pre-install. (2016-06-07)
* a7d67c695ca2 main/[various]: Add group and use it as primary in .pre-* scripts. (2016-06-07)
* 5708404c50a7 community/[various]: Add group and use it as primary in .pre-* scripts. (2016-06-07)
* a835b6916533 testing/[various]: Add group and use it as primary in .pre-* scripts. (2016-06-07)

They are (apart from the first one) part of patch set:

Following packages were overlooked before:

  • testing/buildbot
  • testing/buildbot-slave
  • testing/clapf

My commit fixing them is:

* 94e0b0631f37 testing/[various]: Add group and use it as primary in .pre-* scripts.

It is part of patch set:

Fix problems for those who already installed above mentioned packages in Alpine Linux 3.4.0

Fixes in previous sections work only for people that haven't installed above mentioned packages within Alpine Linux 3.4.0. Even package removal and reinstallation is not enough, because old entries in /etc/passwd and /etc/group remain. You can remove these old entries before reinstallation using deluser, but before that you have to find all the files owned by that user (find / -user NAME) to fix ownership after package reinstallation, as group id will change and user id may change.

We cannot and shouldn't do such invasive changes in automatic way during upgrade, but we can at least add missing groups and add users to them. Mind that such users's primary group will not be changed either (from nogroup), because user could have changed it on her/his own.

Below I'll try to document all known problems:

  • main/apache2: No apache group. (Default config uses apache:apache, so daemon won't start.)
    (sent to ML already, but it's postponed as it will be a part of bigger pull request(s) - it was discussed with ncopa on IRC)
Underconstruction clock icon gray.svg
Todo: Go through all packages, starting from main.