`systemd-userdbd` ( 8 )

мультиплексор запросов на запись пользователя / группы JSON / Совместимость с NSS (JSON User/Group Record Query Multiplexer/NSS Compatibility)

Имя (Name)

systemd-userdbd.service, systemd-userdbd - JSON User/Group Record
       Query Multiplexer/NSS Compatibility

Синопсис (Synopsis)

systemd-userdbd.service

/usr/lib/systemd/systemd-userdbd

Описание (Description)

systemd-userdbd is a system service that multiplexes user/group
       lookups to all local services that provide JSON user/group record
       definitions to the system. In addition it synthesizes JSON
       user/group records from classic UNIX/glibc NSS user/group records
       in order to provide full backwards compatibility. It may also
       pick up statically defined JSON user/group records from drop-in
       files in /etc/userdb/, /run/userdb/, /run/host/userdb/ and
       /usr/lib/userdb/.

       Most of systemd-userdbd's functionality is accessible through the
       userdbctl(1) command.

       The user and group records this service provides access to follow
       the JSON User Records[1] and JSON Group Record[2] definitions.
       This service implements the User/Group Record Lookup API via
       Varlink[3], and multiplexes access other services implementing
       this API, too. It is thus both server and client of this API.

       This service provides three distinct Varlink[4] services:
       io.systemd.Multiplexer provides a single, unified API for
       querying JSON user and group records. Internally it talks to all
       other user/group record services running on the system in
       parallel and forwards any information discovered. This simplifies
       clients substantially since they need to talk to a single service
       only instead of all of them in parallel.
       io.systemd.NameServiceSwitch provides compatibility with classic
       UNIX/glibc NSS user records, i.e. converts struct passwd and
       struct group records as acquired with APIs such as getpwnam(1) to
       JSON user/group records, thus hiding the differences between the
       services as much as possible.  io.systemd.Dropin makes JSON
       user/group records from the aforementioned drop-in directories
       available.

Смотри также (See also)

systemd(1), nss-systemd(8), userdbctl(1),
       systemd-homed.service(8)

Примечание (Note)

1. JSON User Records https://systemd.io/USER_RECORD

2. JSON Group Record https://systemd.io/GROUP_RECORD

3. User/Group Record Lookup API via Varlink https://systemd.io/USER_GROUP_API

4. Varlink https://varlink.org/