Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ 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
- General Public License for more details.
+ Lesser General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
-->
<refnamediv>
<refname>sd_pid_get_session</refname>
+ <refname>sd_pid_get_unit</refname>
<refname>sd_pid_get_owner_uid</refname>
- <refpurpose>Determine session or owner of a session of a specific PID</refpurpose>
+ <refpurpose>Determine session, service or owner of a session of a specific PID</refpurpose>
</refnamediv>
<refsynopsisdiv>
<paramdef>char** <parameter>session</parameter></paramdef>
</funcprototype>
+ <funcprototype>
+ <funcdef>int <function>sd_pid_get_unit</function></funcdef>
+ <paramdef>pid_t <parameter>pid</parameter></paramdef>
+ <paramdef>char** <parameter>unit</parameter></paramdef>
+ </funcprototype>
+
<funcprototype>
<funcdef>int <function>sd_pid_get_owner_uid</function></funcdef>
<paramdef>pid_t <parameter>pid</parameter></paramdef>
<para><function>sd_pid_get_session()</function> may be
used to determine the login session identifier of a
- process identified by the specified process identifier. The session
- identifier is a short string (up to 64 characters),
- consisting only of the characters a-zA-Z0-9 as well as
- '-' and '_'. It is suitable for usage in file system
- paths. Note that not all processes are part of a login
- session (e.g. system service processes and user
- processes that are shared between multiple sessions of
- the same user). For processes not being part of a
- login session this function will fail. The returned
- string needs to be freed with the libc
+ process identified by the specified process
+ identifier. The session identifier is a short string,
+ suitable for usage in file system paths. Note that not
+ all processes are part of a login session (e.g. system
+ service processes, user processes that are shared
+ between multiple sessions of the same user, or kernel
+ threads). For processes not being part of a login
+ session this function will fail. The returned string
+ needs to be freed with the libc
+ <citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ call after use.</para>
+
+ <para><function>sd_pid_get_unit()</function> may be
+ used to determine the systemd unit (i.e. system
+ service) identifier of a process identified by the
+ specified process identifier. The unit name is a short
+ string, suitable for usage in file system paths. Note
+ that not all processes are part of a unit/service
+ (e.g. user processes, or kernel threads). For
+ processes not being part of a systemd unit/system
+ service this function will fail. The returned string
+ needs to be freed with the libc
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
call after use.</para>
fail. For processes not being part of a login session
and not being a shared process of a user this function
will fail.</para>
+
+ <para>If the <literal>pid</literal> parameter of any
+ of these functions is passed as 0 the operation is
+ executed for the calling process.</para>
</refsect1>
<refsect1>
<refsect1>
<title>Notes</title>
- <para>The <function>sd_pid_get_session()</function>
- and <function>sd_pid_get_owner_uid()</function>
- interfaces are available as shared library, which can
- be compiled and linked to with the
+ <para>The <function>sd_pid_get_session()</function>,
+ <function>sd_pid_get_pid()</function>, and
+ <function>sd_pid_get_owner_uid()</function> interfaces
+ are available as shared library, which can be compiled
+ and linked to with the
<literal>libsystemd-login</literal>
<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
file.</para>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_session_is_active</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>getsid</refentrytitle><manvolnum>2</manvolnum></citerefentry>
</para>
~ianmdlvl / elogind.git / blobdiff