mirror of
https://github.com/systemd/systemd.git
synced 2024-12-27 07:22:31 +03:00
8dc385e770
Shift the asterisks in the documentation's prototypes such that they are consistent among each other. Use the right side to match source code.
276 lines
12 KiB
XML
276 lines
12 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
||
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
|
||
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
||
|
||
<!--
|
||
This file is part of systemd.
|
||
|
||
Copyright 2014 Zbigniew Jędrzejewski-Szmek
|
||
|
||
systemd is free software; you can redistribute it and/or modify it
|
||
under the terms of the GNU Lesser General Public License as published by
|
||
the Free Software Foundation; either version 2.1 of the License, or
|
||
(at your option) any later version.
|
||
|
||
systemd is distributed in the hope that it will be useful, but
|
||
WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
Lesser General Public License for more details.
|
||
|
||
You should have received a copy of the GNU Lesser General Public License
|
||
along with systemd; If not, see <http://www.gnu.org/licenses/>.
|
||
-->
|
||
|
||
<refentry id="sd_bus_creds_new_from_pid">
|
||
|
||
<refentryinfo>
|
||
<title>sd_bus_creds_new_from_pid</title>
|
||
<productname>systemd</productname>
|
||
|
||
<authorgroup>
|
||
<author>
|
||
<contrib>A monkey with a typewriter</contrib>
|
||
<firstname>Zbigniew</firstname>
|
||
<surname>Jędrzejewski-Szmek</surname>
|
||
<email>zbyszek@in.waw.pl</email>
|
||
</author>
|
||
</authorgroup>
|
||
</refentryinfo>
|
||
|
||
<refmeta>
|
||
<refentrytitle>sd_bus_creds_new_from_pid</refentrytitle>
|
||
<manvolnum>3</manvolnum>
|
||
</refmeta>
|
||
|
||
<refnamediv>
|
||
<refname>sd_bus_creds_new_from_pid</refname>
|
||
<refname>sd_bus_creds_get_mask</refname>
|
||
<refname>sd_bus_creds_ref</refname>
|
||
<refname>sd_bus_creds_unref</refname>
|
||
|
||
<refpurpose>Retrieve credentials object for the specified PID</refpurpose>
|
||
</refnamediv>
|
||
|
||
<refsynopsisdiv>
|
||
<funcsynopsis>
|
||
<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
|
||
|
||
<funcprototype>
|
||
<funcdef>int <function>sd_bus_creds_new_from_pid</function></funcdef>
|
||
<paramdef>pid_t <parameter>pid</parameter></paramdef>
|
||
<paramdef>uint64_t <parameter>creds_mask</parameter></paramdef>
|
||
<paramdef>sd_bus_creds **<parameter>ret</parameter></paramdef>
|
||
</funcprototype>
|
||
|
||
<funcprototype>
|
||
<funcdef>uint64_t <function>sd_bus_creds_get_mask</function></funcdef>
|
||
<paramdef>const sd_bus_creds *<parameter>c</parameter></paramdef>
|
||
</funcprototype>
|
||
|
||
<funcprototype>
|
||
<funcdef>sd_bus_creds *<function>sd_bus_creds_ref</function></funcdef>
|
||
<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
|
||
</funcprototype>
|
||
|
||
<funcprototype>
|
||
<funcdef>sd_bus_creds *<function>sd_bus_creds_unref</function></funcdef>
|
||
<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
|
||
</funcprototype>
|
||
</funcsynopsis>
|
||
|
||
<para>
|
||
<constant>SD_BUS_CREDS_PID</constant>,
|
||
<constant>SD_BUS_CREDS_PID_STARTTIME</constant>,
|
||
<constant>SD_BUS_CREDS_TID</constant>,
|
||
<constant>SD_BUS_CREDS_UID</constant>,
|
||
<constant>SD_BUS_CREDS_GID</constant>,
|
||
<constant>SD_BUS_CREDS_COMM</constant>,
|
||
<constant>SD_BUS_CREDS_TID_COMM</constant>,
|
||
<constant>SD_BUS_CREDS_EXE</constant>,
|
||
<constant>SD_BUS_CREDS_CMDLINE</constant>,
|
||
<constant>SD_BUS_CREDS_CGROUP</constant>,
|
||
<constant>SD_BUS_CREDS_UNIT</constant>,
|
||
<constant>SD_BUS_CREDS_USER_UNIT</constant>,
|
||
<constant>SD_BUS_CREDS_SLICE</constant>,
|
||
<constant>SD_BUS_CREDS_SESSION</constant>,
|
||
<constant>SD_BUS_CREDS_OWNER_UID</constant>,
|
||
<constant>SD_BUS_CREDS_EFFECTIVE_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_PERMITTED_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_INHERITABLE_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_BOUNDING_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_SELINUX_CONTEXT</constant>,
|
||
<constant>SD_BUS_CREDS_AUDIT_SESSION_ID</constant>,
|
||
<constant>SD_BUS_CREDS_AUDIT_LOGIN_UID</constant>,
|
||
<constant>SD_BUS_CREDS_UNIQUE_NAME</constant>,
|
||
<constant>SD_BUS_CREDS_WELL_KNOWN_NAMES</constant>,
|
||
<constant>_SD_BUS_CREDS_ALL</constant>
|
||
</para>
|
||
</refsynopsisdiv>
|
||
|
||
<refsect1>
|
||
<title>Description</title>
|
||
|
||
<para><function>sd_bus_creds_new_from_pid()</function> creates a new
|
||
credentials object and fills it with information about the process
|
||
<parameter>pid</parameter>. This pointer to this object will
|
||
be stored in <parameter>ret</parameter> pointer.</para>
|
||
|
||
<para>The information that will be stored is determined by
|
||
<parameter>creds_mask</parameter>. It may contain a subset of ORed
|
||
constants <constant>SD_BUS_CREDS_PID</constant>,
|
||
<constant>SD_BUS_CREDS_PID_STARTTIME</constant>,
|
||
<constant>SD_BUS_CREDS_TID</constant>,
|
||
<constant>SD_BUS_CREDS_UID</constant>,
|
||
<constant>SD_BUS_CREDS_GID</constant>,
|
||
<constant>SD_BUS_CREDS_COMM</constant>,
|
||
<constant>SD_BUS_CREDS_TID_COMM</constant>,
|
||
<constant>SD_BUS_CREDS_EXE</constant>,
|
||
<constant>SD_BUS_CREDS_CMDLINE</constant>,
|
||
<constant>SD_BUS_CREDS_CGROUP</constant>,
|
||
<constant>SD_BUS_CREDS_UNIT</constant>,
|
||
<constant>SD_BUS_CREDS_USER_UNIT</constant>,
|
||
<constant>SD_BUS_CREDS_SLICE</constant>,
|
||
<constant>SD_BUS_CREDS_SESSION</constant>,
|
||
<constant>SD_BUS_CREDS_OWNER_UID</constant>,
|
||
<constant>SD_BUS_CREDS_EFFECTIVE_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_PERMITTED_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_INHERITABLE_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_BOUNDING_CAPS</constant>,
|
||
<constant>SD_BUS_CREDS_SELINUX_CONTEXT</constant>,
|
||
<constant>SD_BUS_CREDS_AUDIT_SESSION_ID</constant>,
|
||
<constant>SD_BUS_CREDS_AUDIT_LOGIN_UID</constant>,
|
||
<constant>SD_BUS_CREDS_UNIQUE_NAME</constant>,
|
||
<constant>SD_BUS_CREDS_WELL_KNOWN_NAMES</constant>,
|
||
or <constant>_SD_BUS_CREDS_ALL</constant> to indicate
|
||
all known fields.</para>
|
||
|
||
<para>Fields can be retrieved from the credentials object using
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||
and other functions which correspond directly to the constants
|
||
listed above.</para>
|
||
|
||
<para>A mask of fields which were actually sucessfully set
|
||
(acquired from <filename>/proc</filename>, etc.) can be retrieved
|
||
with <function>sd_bus_creds_get_mask()</function>. If the
|
||
credentials object was created with
|
||
<function>sd_bus_creds_new_from_pid()</function>, this will be a
|
||
subset of fields requested in <parameter>creds_mask</parameter>.
|
||
</para>
|
||
|
||
<para><function>sd_bus_creds_ref</function> creates a new
|
||
reference to the credentials object <parameter>c</parameter>. This
|
||
object will not be destroyed until
|
||
<function>sd_bus_creds_unref</function> has been called as many
|
||
times plus once more. Once the reference count has dropped to zero,
|
||
<parameter>c</parameter> cannot be used anymore, so futher
|
||
calls to <function>sd_bus_creds_ref(c)</function> or
|
||
<function>sd_bus_creds_unref(c)</function> are illegal.</para>
|
||
|
||
<para><function>sd_bus_creds_unref</function> destroys a reference
|
||
to <parameter>c</parameter>.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Return Value</title>
|
||
|
||
<para>On success, <function>sd_bus_creds_new_from_pid()</function>
|
||
returns 0 or a positive integer. On failure, it returns a negative
|
||
errno-style error code.</para>
|
||
|
||
<para><function>sd_bus_creds_get_mask()</function> returns the
|
||
mask of successfully acquired fields.</para>
|
||
|
||
<para><function>sd_bus_creds_ref</function> always returns the
|
||
argument.</para>
|
||
|
||
<para><function>sd_bus_creds_unref</function> always returns
|
||
<constant>NULL</constant>.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Reference ownership</title>
|
||
|
||
<para>Function <function>sd_bus_creds_new_from_pid()</function>
|
||
creates a new object and the caller owns the sole reference. When
|
||
not needed anymore, this reference should be destroyed with
|
||
<citerefentry><refentrytitle>sd_bus_creds_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
||
</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Errors</title>
|
||
|
||
<para>Returned errors may indicate the following problems:</para>
|
||
|
||
<variablelist>
|
||
|
||
<varlistentry>
|
||
<term><varname>-ESRCH</varname></term>
|
||
|
||
<listitem><para>Specified <parameter>pid</parameter> could not
|
||
be found.</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>-EINVAL</varname></term>
|
||
|
||
<listitem><para>Specified parameter is invalid
|
||
(<constant>NULL</constant> in case of output
|
||
parameters).</para></listitem>
|
||
</varlistentry>
|
||
|
||
<varlistentry>
|
||
<term><varname>-ENOMEM</varname></term>
|
||
|
||
<listitem><para>Memory allocation failed.</para></listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Notes</title>
|
||
|
||
<para><function>sd_bus_creds_new_from_pid()</function> is
|
||
available as a shared library, which can be compiled and linked to
|
||
with the
|
||
<constant>libsystemd</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
||
file.</para>
|
||
</refsect1>
|
||
|
||
<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_ref</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_pid_starttime</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_tid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_gid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_comm</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_tid_comm</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_exe</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_cmdline</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_cgroup</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_unit</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_user_unit</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_slice</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_owner_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_has_effective_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_has_permitted_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_has_inheritable_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_has_bounding_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_selinux_context</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_audit_session_id</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_audit_login_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_unique_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_bus_creds_get_well_known_names</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||
</para>
|
||
</refsect1>
|
||
|
||
</refentry>
|