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man: document new ability to connect to user of container

This commit is contained in:
Lennart Poettering 2020-12-14 13:23:00 +01:00
parent 1b630835df
commit ba4a31b7a6
2 changed files with 28 additions and 4 deletions
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22
man/sd_bus_default.xml
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@ -24,6 +24,7 @@
<refname>sd_bus_open_with_description</refname>
<refname>sd_bus_open_user</refname>
<refname>sd_bus_open_user_with_description</refname>
<refname>sd_bus_open_user_machine</refname>
<refname>sd_bus_open_system</refname>
<refname>sd_bus_open_system_with_description</refname>
<refname>sd_bus_open_system_remote</refname>
@ -73,6 +74,12 @@
<paramdef>const char *<parameter>description</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_open_user_machine</function></funcdef>
<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
<paramdef>const char *<parameter>machine</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_bus_open_system</function></funcdef>
<paramdef>sd_bus **<parameter>bus</parameter></paramdef>
@ -187,14 +194,24 @@
work for the root user on the remote machine.</para>
<para><function>sd_bus_open_system_machine()</function> connects to the system bus in the specified
<parameter>machine</parameter>, where <parameter>machine</parameter> is the name of a local
container. See
<parameter>machine</parameter>, where <parameter>machine</parameter> is the name of a local container,
possibly prefixed by a user name and a separating <literal>@</literal>. If the container name is
specified as the special string <literal>.host</literal> the connection is made to the local system. This
is useful to connect to the local system bus as specific user, e.g. <literal>foobar@.host</literal> to
connect to the local system bus as local user <literal>foobar</literal>. If the <literal>@</literal>
syntax is used either the left-hand side or the right-hand side may be ommited (but not both) in which
case the local user name or <literal>.host</literal> is implied. If the <literal>@</literal> syntax is
not used the connection is always made as root user. See
<citerefentry><refentrytitle>sd_bus_set_address</refentrytitle><manvolnum>3</manvolnum></citerefentry>
for a description of the address syntax, and
<citerefentry><refentrytitle>machinectl</refentrytitle><manvolnum>1</manvolnum></citerefentry> for more
information about the "machine" concept. Note that connections into local containers are only available
to privileged processes at this time.</para>
<para><function>sd_bus_open_user_machine()</function> is similar to
<function>sd_bus_open_system_machine()</function>, but connects to the user bus of the root user, or if
the <literal>@</literal> syntax is used, of the specified user.</para>
<para>These calls allocate a bus connection object and initiate
the connection to a well-known bus of some form. An alternative to
using these high-level calls is to create an unconnected bus
@ -210,6 +227,7 @@
<title>Reference ownership</title>
<para>The functions <function>sd_bus_open()</function>,
<function>sd_bus_open_user()</function>,
<function>sd_bus_open_user_machine()</function>,
<function>sd_bus_open_system()</function>,
<function>sd_bus_open_system_remote()</function>, and
<function>sd_bus_open_system_machine()</function> return a new

10
man/user-system-options.xml
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@ -45,8 +45,14 @@
<term><option>--machine=</option></term>
<listitem id='machine-text'>
<para>Execute operation on a local container. Specify a
container name to connect to.</para>
<para>Execute operation on a local container. Specify a container name to connect to, optionally
prefixed by a user name to connect as and a separating <literal>@</literal> character. If the special
string <literal>.host</literal> is used in place of the container name, a connection to the local
system is made (which is useful to connect to a specific user's user bus: <literal>--user
--machine=lennart@.host</literal>). If the <literal>@</literal> syntax is not used, the connection is
made as root user. If the <literal>@</literal> syntax is used either the left hand side or the right hand
side may be ommitted (but not both) in which case the local user name and <literal>.host</literal> are
implied.</para>
</listitem>
</varlistentry>
</variablelist>