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dd6c17b159
This replaces OOMAdjust= by OOMScoreAdjust= in the config files, breaking compatibility with older unit files. However, this keeps compat with older kernels which lack the new OOM rework.
747 lines
43 KiB
XML
747 lines
43 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<?xml-stylesheet type="text/xsl" href="http://docbook.sourceforge.net/release/xsl/current/xhtml/docbook.xsl"?>
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="systemd.exec">
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<refentryinfo>
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<title>systemd.exec</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>systemd.exec</refentrytitle>
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<manvolnum>5</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>systemd.exec</refname>
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<refpurpose>systemd execution environment configuration</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<para><filename>systemd.service</filename>,
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<filename>systemd.socket</filename>,
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<filename>systemd.mount</filename></para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>Unit configuration files for services, sockets
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and mount points share a subset of configuration
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options which define the execution environment of
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spawned processes.</para>
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<para>This man page lists the configuration options
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shared by these three unit types. See
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for the common options of all unit configuration
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files, and
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<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>, <citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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and
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<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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for more information on the specific unit
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configuration files. The execution specific
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configuration options are configured in the [Service],
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[Socket] resp. [Mount] section, depending on the unit
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type.</para>
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</refsect1>
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<refsect1>
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<title>Options</title>
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<variablelist>
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<varlistentry>
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<term><varname>WorkingDirectory=</varname></term>
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<listitem><para>Takes an absolute
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directory path. Sets the working
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directory for executed
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processes.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>RootDirectory=</varname></term>
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<listitem><para>Takes an absolute
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directory path. Sets the root
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directory for executed processes, with
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the
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<citerefentry><refentrytitle>chroot</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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system call. If this is used it must
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be ensured that the process and all
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its auxiliary files are available in
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the <function>chroot()</function>
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jail.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>User=</varname></term>
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<term><varname>Group=</varname></term>
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<listitem><para>Sets the Unix user
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resp. group the processes are executed
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as. Takes a single user resp. group
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name or ID as argument. If no group is
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set the default group of the user is
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chosen.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>SupplementaryGroups=</varname></term>
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<listitem><para>Sets the supplementary
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Unix groups the processes are executed
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as. This takes a space seperated list
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of group names or IDs. This option may
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be specified more than once in which
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case all listed groups are set as
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supplementary groups. This option does
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not override but extend the list of
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supplementary groups configured in the
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system group database for the
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user.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Nice=</varname></term>
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<listitem><para>Sets the default nice
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level (scheduling priority) for
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executed processes. Takes an integer
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between -20 (highest priority) and 19
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(lowest priority). See
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<citerefentry><refentrytitle>setpriority</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>OOMScoreAdjust=</varname></term>
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<listitem><para>Sets the adjustment
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level for the Out-Of-Memory killer for
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executed processes. Takes an integer
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between -1000 (to disable OOM killing
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for this process) and 1000 (to make
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killing of this process under memory
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pressure very likely). See <ulink
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url="http://www.kernel.org/doc/Documentation/filesystems/proc.txt">proc.txt</ulink>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>IOSchedulingClass=</varname></term>
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<listitem><para>Sets the IO scheduling
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class for executed processes. Takes an
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integer between 0 and 3 or one of the
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strings <option>none</option>,
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<option>realtime</option>,
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<option>best-effort</option> or
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<option>idle</option>. See
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<citerefentry><refentrytitle>ioprio_set</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>IOSchedulingPriority=</varname></term>
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<listitem><para>Sets the IO scheduling
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priority for executed processes. Takes
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an integer between 0 (highest
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priority) and 7 (lowest priority). The
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available priorities depend on the
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selected IO scheduling class (see
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above). See
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<citerefentry><refentrytitle>ioprio_set</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>CPUSchedulingPolicy=</varname></term>
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<listitem><para>Sets the CPU
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scheduling policy for executed
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processes. Takes one of
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<option>other</option>,
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<option>batch</option>,
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<option>idle</option>,
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<option>fifo</option> or
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<option>rr</option>. See
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<citerefentry><refentrytitle>sched_setscheduler</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>CPUSchedulingPriority=</varname></term>
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<listitem><para>Sets the CPU
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scheduling priority for executed
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processes. Takes an integer between 1
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(lowest priority) and 99 (highest
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priority). The available priority
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range depends on the selected CPU
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scheduling policy (see above). See
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<citerefentry><refentrytitle>sched_setscheduler</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>CPUSchedulingResetOnFork=</varname></term>
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<listitem><para>Takes a boolean
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argument. If true elevated CPU
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scheduling priorities and policies
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will be reset when the executed
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processes fork, and can hence not leak
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into child processes. See
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<citerefentry><refentrytitle>sched_setscheduler</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details. Defaults to false.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>CPUAffinity=</varname></term>
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<listitem><para>Controls the CPU
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affinity of the executed
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processes. Takes a space-seperated
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list of CPU indexes. See
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<citerefentry><refentrytitle>sched_setaffinity</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>UMask=</varname></term>
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<listitem><para>Controls the file mode
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creation mask. Takes an access mode in
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octal notation. See
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<citerefentry><refentrytitle>umask</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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for details. Defaults to
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0002.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>Environment=</varname></term>
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<listitem><para>Sets environment
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variables for executed
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processes. Takes a space-seperated
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list of variable assignments. This
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option may be specified more than once
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in which case all listed variables
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will be set. If the same variable is
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set twice the later setting will
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override the earlier setting. See
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<citerefentry><refentrytitle>environ</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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for details.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>EnvironmentFile=</varname></term>
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<listitem><para>Similar to
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<varname>Environment=</varname> but
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reads the environment variables from a
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text file. The text file should
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contain new-line seperated variable
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assignments. Empty lines and lines
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starting with ; or # will be ignored,
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which may be used for
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commenting.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>StandardInput=</varname></term>
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<listitem><para>Controls where file
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descriptor 0 (STDIN) of the executed
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processes is connected to. Takes one
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of <option>null</option>,
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<option>tty</option>,
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<option>tty-force</option>,
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<option>tty-fail</option> or
|
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<option>socket</option>. If
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<option>null</option> is selected
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standard input will be connected to
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<filename>/dev/null</filename>,
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i.e. all read attempts by the process
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will result in immediate EOF. If
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<option>tty</option> is selected
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standard input is connected to a TTY
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(as configured by
|
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<varname>TTYPath=</varname>, see
|
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below) and the executed process
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becomes the controlling process of the
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terminal. If the terminal is already
|
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being controlled by another process it
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is waited until that process releases
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the
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terminal. <option>tty-force</option>
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is similar to <option>tty</option>,
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but the executed process is forcefully
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and immediately made the controlling
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process of the terminal, potentially
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removing previous controlling
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processes from the
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terminal. <option>tty-fail</option> is
|
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similar to <option>tty</option> but if
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the terminal already has a controlling
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process start-up of the executed
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process fails. The
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<option>socket</option> option is only
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valid in socket-activated services,
|
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and only when the socket configuration
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file (see
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<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
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for details) specifies a single socket
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only. If this option is set standard
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input will be connected to the socket
|
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the service was activated from, which
|
|
is primarily useful for compatibility
|
|
with daemons designed for use with the
|
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traditional
|
|
<citerefentry><refentrytitle>inetd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
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daemon. This setting defaults to
|
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<option>null</option>.</para></listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>StandardOutput=</varname></term>
|
|
<listitem><para>Controls where file
|
|
descriptor 1 (STDOUT) of the executed
|
|
processes is connected to. Takes one
|
|
of <option>inherit</option>,
|
|
<option>null</option>,
|
|
<option>tty</option>,
|
|
<option>syslog</option>,
|
|
<option>kmsg</option> or
|
|
<option>socket</option>. If set to
|
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<option>inherit</option> the file
|
|
descriptor of standard input is
|
|
duplicated for standard output. If set
|
|
to <option>null</option> standard
|
|
output will be connected to
|
|
<filename>/dev/null</filename>,
|
|
i.e. everything written to it will be
|
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lost. If set to <option>tty</option>
|
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standard output will be connected to a
|
|
tty (as configured via
|
|
<varname>TTYPath=</varname>, see
|
|
below). If the TTY is used for output
|
|
only the executed process will not
|
|
become the controlling process of the
|
|
terminal, and will not fail or wait
|
|
for other processes to release the
|
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terminal. <option>syslog</option>
|
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connects standard output to the
|
|
<citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
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system logger. <option>kmsg</option>
|
|
connects it with the kernel log buffer
|
|
which is accessible via
|
|
<citerefentry><refentrytitle>dmesg</refentrytitle><manvolnum>1</manvolnum></citerefentry>. <option>socket</option>
|
|
connects standard output to a socket
|
|
from socket activation, semantics are
|
|
similar to the respective option of
|
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<varname>StandardInput=</varname>.
|
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This setting defaults to
|
|
<option>inherit</option>.</para></listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>StandardError=</varname></term>
|
|
<listitem><para>Controls where file
|
|
descriptor 2 (STDERR) of the executed
|
|
processes is connected to. The
|
|
available options are identical to
|
|
those of
|
|
<varname>StandardOutput=</varname>,
|
|
whith one exception: if set to
|
|
<option>inherit</option> the file
|
|
descriptor used for standard output is
|
|
duplicated for standard error. This
|
|
setting defaults to
|
|
<option>inherit</option>.</para></listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>TTYPath=</varname></term>
|
|
<listitem><para>Sets the terminal
|
|
device node to use if standard input,
|
|
output or stderr are connected to a
|
|
TTY (see above). Defaults to
|
|
<filename>/dev/console</filename>.</para></listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>SyslogIdentifer=</varname></term>
|
|
<listitem><para>Sets the process name
|
|
to prefix log lines sent to syslog or
|
|
the kernel log buffer with. If not set
|
|
defaults to the process name of the
|
|
executed process. This option is only
|
|
useful when
|
|
<varname>StandardOutput=</varname> or
|
|
<varname>StandardError=</varname> are
|
|
set to <option>syslog</option> or
|
|
<option>kmsg</option>.</para></listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>SyslogFacility=</varname></term>
|
|
<listitem><para>Sets the syslog
|
|
facility to use when logging to
|
|
syslog. One of <option>kern</option>,
|
|
<option>user</option>,
|
|
<option>mail</option>,
|
|
<option>daemon</option>,
|
|
<option>auth</option>,
|
|
<option>syslog</option>,
|
|
<option>lpr</option>,
|
|
<option>news</option>,
|
|
<option>uucp</option>,
|
|
<option>cron</option>,
|
|
<option>authpriv</option>,
|
|
<option>ftp</option>,
|
|
<option>local0</option>,
|
|
<option>local1</option>,
|
|
<option>local2</option>,
|
|
<option>local3</option>,
|
|
<option>local4</option>,
|
|
<option>local5</option>,
|
|
<option>local6</option> or
|
|
<option>local7</option>. See
|
|
<citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
for details. This option is only
|
|
useful when
|
|
<varname>StandardOutput=</varname> or
|
|
<varname>StandardError=</varname> are
|
|
set to <option>syslog</option>.
|
|
Defaults to
|
|
<option>daemon</option>.</para></listitem>
|
|
</varlistentry>
|
|
<varlistentry>
|
|
<term><varname>SyslogLevel=</varname></term>
|
|
<listitem><para>Default syslog level
|
|
to use when logging to syslog or the
|
|
kernel log buffer. One of
|
|
<option>emerg</option>,
|
|
<option>alert</option>,
|
|
<option>crit</option>,
|
|
<option>err</option>,
|
|
<option>warning</option>,
|
|
<option>notice</option>,
|
|
<option>info</option>,
|
|
<option>debug</option>. See
|
|
<citerefentry><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
|
for details. This option is only
|
|
useful when
|
|
<varname>StandardOutput=</varname> or
|
|
<varname>StandardError=</varname> are
|
|
set to <option>syslog</option> or
|
|
<option>kmsg</option>. Note that
|
|
individual lines output by the daemon
|
|
might be prefixed with a different log
|
|
level which can be used to override
|
|
the default log level specified
|
|
here. The interpretation of these
|
|
prefixes may be disabled with
|
|
<varname>SyslogLevelPrefix=</varname>,
|
|
see below. For details see
|
|
<citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
|
|
|
|
Defaults to
|
|
<option>info</option>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>SyslogLevelPrefix=</varname></term>
|
|
<listitem><para>Takes a boolean
|
|
argument. If true and
|
|
<varname>StandardOutput=</varname> or
|
|
<varname>StandardError=</varname> are
|
|
set to <option>syslog</option> or
|
|
<option>kmsg</option> log lines
|
|
written by the executed process that
|
|
are prefixed with a log level will be
|
|
passed on to syslog with this log
|
|
level set but the prefix removed. If
|
|
set to false, the interpretation of
|
|
these prefixes is disabled and the
|
|
logged lines are passed on as-is. For
|
|
details about this prefixing see
|
|
<citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>7</manvolnum></citerefentry>.
|
|
Defaults to true.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>TimerSlackNSec=</varname></term>
|
|
<listitem><para>Sets the timer slack
|
|
in nanoseconds for the executed
|
|
processes The timer slack controls the
|
|
accuracy of wake-ups triggered by
|
|
timers. See
|
|
<citerefentry><refentrytitle>prctl</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
for more information. Note that in
|
|
contrast to most other time span
|
|
definitions this value is takes a
|
|
nano-seconds integer and does not
|
|
understand any other
|
|
units.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>LimitCPU=</varname></term>
|
|
<term><varname>LimitFSIZE=</varname></term>
|
|
<term><varname>LimitDATA=</varname></term>
|
|
<term><varname>LimitSTACK=</varname></term>
|
|
<term><varname>LimitCORE=</varname></term>
|
|
<term><varname>LimitRSS=</varname></term>
|
|
<term><varname>LimitNOFILE=</varname></term>
|
|
<term><varname>LimitAS=</varname></term>
|
|
<term><varname>LimitNPROC=</varname></term>
|
|
<term><varname>LimitMEMLOCK=</varname></term>
|
|
<term><varname>LimitLOCKS=</varname></term>
|
|
<term><varname>LimitSIGPENDING=</varname></term>
|
|
<term><varname>LimitMSGQUEUE=</varname></term>
|
|
<term><varname>LimitNICE=</varname></term>
|
|
<term><varname>LimitRTPRIO=</varname></term>
|
|
<term><varname>LimitRTTIME=</varname></term>
|
|
<listitem><para>These settings control
|
|
various resource limits for executed
|
|
processes. See
|
|
<citerefentry><refentrytitle>setrlimit</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>PAMName=</varname></term>
|
|
<listitem><para>Sets the PAM service
|
|
name to set up a session as. If set
|
|
the executed process will be
|
|
registered as a PAM session under the
|
|
specified service name. This is only
|
|
useful in conjunction with the
|
|
<varname>User=</varname> setting. If
|
|
not set no PAM session will be opened
|
|
for the executed processes. See
|
|
<citerefentry><refentrytitle>pam</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>TCPWrapName=</varname></term>
|
|
<listitem><para>If this is a
|
|
socket-activated service this sets the
|
|
tcpwrap service name to check the
|
|
permission for the current connection
|
|
with. This is only useful in
|
|
conjunction with socket-activated
|
|
services, and stream sockets (TCP) in
|
|
particular. It has no effect on other
|
|
socket types (e.g. datagram/UDP) and on processes
|
|
unrelated to socket-based
|
|
activation. If the tcpwrap
|
|
verification fails daemon start-up
|
|
will fail and the connection is
|
|
terminated. See
|
|
<citerefentry><refentrytitle>tcpd</refentrytitle><manvolnum>8</manvolnum></citerefentry>
|
|
for details.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>Capabilities=</varname></term>
|
|
<listitem><para>Controls the
|
|
<citerefentry><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
set for the executed process. Take a
|
|
capability string as described in
|
|
<citerefentry><refentrytitle>cap_from_text</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
|
Note that this capability set is
|
|
usually influenced by the capabilities
|
|
attached to the executed
|
|
file.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>SecureBits=</varname></term>
|
|
<listitem><para>Controls the secure
|
|
bits set for the executed process. See
|
|
<citerefentry><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for details. Takes a list of strings:
|
|
<option>keep-caps</option>,
|
|
<option>keep-caps-locked</option>,
|
|
<option>no-setuid-fixup</option>,
|
|
<option>no-setuid-fixup-locked</option>,
|
|
<option>no-setuid-noroot</option> and/or
|
|
<option>no-setuid-noroot-locked</option>.
|
|
</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>CapabilityBoundingSetDrop=</varname></term>
|
|
|
|
<listitem><para>Controls the
|
|
capability bounding set drop set for
|
|
the executed process. See
|
|
<citerefentry><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
|
for details. Takes a list of
|
|
capability names as read by
|
|
<citerefentry><refentrytitle>cap_from_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
|
|
</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>ControlGroup=</varname></term>
|
|
|
|
<listitem><para>Controls the control
|
|
groups the executed processes shall be
|
|
made members of. Takes a
|
|
space-seperated list of cgroup
|
|
identifiers. A cgroup identifier has a
|
|
format like
|
|
<filename>cpu:/foo/bar</filename>,
|
|
where "cpu" identifies the kernel
|
|
control group controller used, and
|
|
<filename>/foo/bar</filename> is the
|
|
control group path. The controller name
|
|
and ":" may be omitted in which case
|
|
the named systemd control group
|
|
hierarchy is implied. Alternatively,
|
|
the path and ":" may be omitted, in
|
|
which case the default control group
|
|
path for this unit is implied. This
|
|
option may be used to place executed
|
|
processes in arbitrary groups in
|
|
arbitrary hierachies -- which can be
|
|
configured externally with additional execution limits. By default
|
|
systemd will place all executed
|
|
processes in seperate per-unit control
|
|
groups (named after the unit) in the
|
|
systemd named hierarchy. Since every
|
|
process can be in one group per
|
|
hierarchy only overriding the control group
|
|
path in the named systemd hierarchy
|
|
will disable automatic placement in
|
|
the default group. For details about control
|
|
groups see <ulink
|
|
url="http://www.kernel.org/doc/Documentation/cgroups/cgroups.txt">cgroups.txt</ulink>.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>ReadWriteDirectories=</varname></term>
|
|
<term><varname>ReadOnlyDirectories=</varname></term>
|
|
<term><varname>InaccessibleDirectories=</varname></term>
|
|
|
|
<listitem><para>Sets up a new
|
|
file-system name space for executed
|
|
processes. These options may be used
|
|
to limit access a process might have
|
|
to the main file-system
|
|
hierarchy. Each setting takes a
|
|
space-seperated list of absolute
|
|
directory paths. Directories listed in
|
|
<varname>ReadWriteDirectories=</varname>
|
|
are accessible from within the
|
|
namespace with the same access rights
|
|
as from outside. Directories listed in
|
|
<varname>ReadOnlyDirectories=</varname>
|
|
are accessible for reading only,
|
|
writing will be refused even if the
|
|
usual file access controls would
|
|
permit this. Directories listed in
|
|
<varname>InaccessibleDirectories=</varname>
|
|
will be made inaccesible for processes
|
|
inside the namespace. Note that
|
|
restricting access with these options
|
|
does not extend to submounts of a
|
|
directory. You must list submounts
|
|
seperately in these setttings to
|
|
ensure the same limited access. These
|
|
options may be specified more than
|
|
once in which case all directories
|
|
listed will have limited access from
|
|
within the
|
|
namespace.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>PrivateTmp=</varname></term>
|
|
|
|
<listitem><para>Takes a boolean
|
|
argument. If true sets up a new
|
|
namespace for the executed processes
|
|
and mounts a private
|
|
<filename>/tmp</filename> directory
|
|
inside it, that is not shared by
|
|
processes outside of the
|
|
namespace. This is useful to secure
|
|
access to temporary files of the
|
|
process, but makes sharing between
|
|
processes via
|
|
<filename>/tmp</filename>
|
|
impossible. Defaults to false.</para></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><varname>MountFlags=</varname></term>
|
|
|
|
<listitem><para>Takes a mount
|
|
propagation flag:
|
|
<option>shared</option>,
|
|
<option>slave</option> or
|
|
<option>private</option>, which
|
|
control whether namespaces set up with
|
|
<varname>ReadWriteDirectories=</varname>,
|
|
<varname>ReadOnlyDirectories=</varname>
|
|
and
|
|
<varname>InaccessibleDirectories=</varname>
|
|
receive or propagate new mounts
|
|
from/to the main namespace. See
|
|
<citerefentry><refentrytitle>mount</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
for details. Defaults to
|
|
<option>shared</option>, i.e. the new
|
|
namespace will both receive new mount
|
|
points from the main namespace as well
|
|
as propagate new mounts to
|
|
it.</para></listitem>
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
|
<citerefentry><refentrytitle>systemd.mount</refentrytitle><manvolnum>5</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|