<?xml version='1.0'?> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> <!-- SPDX-License-Identifier: LGPL-2.1+ --> <refentry id="sd_bus_get_name_creds" xmlns:xi="http://www.w3.org/2001/XInclude"> <refentryinfo> <title>sd_bus_get_name_creds</title> <productname>systemd</productname> </refentryinfo> <refmeta> <refentrytitle>sd_bus_get_name_creds</refentrytitle> <manvolnum>3</manvolnum> </refmeta> <refnamediv> <refname>sd_bus_get_name_creds</refname> <refname>sd_bus_get_owner_creds</refname> <refpurpose>Query bus client credentials</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> <funcprototype> <funcdef>int <function>sd_bus_get_name_creds</function></funcdef> <paramdef>sd_bus *<parameter>bus</parameter></paramdef> <paramdef>const char *<parameter>name</parameter></paramdef> <paramdef>uint64_t <parameter>mask</parameter></paramdef> <paramdef>sd_bus_creds **<parameter>creds</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>int <function>sd_bus_get_owner_creds</function></funcdef> <paramdef>sd_bus *<parameter>bus</parameter></paramdef> <paramdef>uint64_t <parameter>mask</parameter></paramdef> <paramdef>sd_bus_creds **<parameter>creds</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1> <title>Description</title> <para><function>sd_bus_get_name_creds()</function> queries the credentials of the bus client identified by <parameter>name</parameter>. The <parameter>mask</parameter> parameter is a combo of <constant index='false'>SD_BUS_CREDS_*</constant> flags that indicate which credential info the caller is interested in. See <citerefentry><refentrytitle>sd_bus_creds_new_from_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry> for a list of possible flags. On success, <parameter>creds</parameter> contains a new <structname>sd_bus_creds</structname> instance with the requested information. Ownership of this instance belongs to the caller and it should be freed once no longer needed by calling <citerefentry><refentrytitle>sd_bus_creds_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>. </para> <para><function>sd_bus_get_owner_creds()</function> queries the credentials of the creator of the given bus. The <parameter>mask</parameter> and <parameter>creds</parameter> parameters behave the same as in <function>sd_bus_get_name_creds()</function>.</para> </refsect1> <refsect1> <title>Return Value</title> <para>On success, these functions return a non-negative integer. On failure, they return a negative errno-style error code.</para> <refsect2> <title>Errors</title> <para>Returned errors may indicate the following problems:</para> <variablelist> <varlistentry> <term><constant>-EINVAL</constant></term> <listitem><para>An argument is invalid.</para></listitem> </varlistentry> <varlistentry> <term><constant>-ENOPKG</constant></term> <listitem><para>The bus cannot be resolved.</para></listitem> </varlistentry> <varlistentry> <term><constant>-EPERM</constant></term> <listitem><para>The bus has already been started.</para></listitem> </varlistentry> <varlistentry> <term><constant>-ECHILD</constant></term> <listitem><para>The bus was created in a different process.</para></listitem> </varlistentry> <varlistentry> <term><constant>-ENOMEM</constant></term> <listitem><para>Memory allocation failed.</para></listitem> </varlistentry> </variablelist> </refsect2> </refsect1> <xi:include href="libsystemd-pkgconfig.xml" /> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd_bus_creds_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry> </para> </refsect1> </refentry>