SMACK: Add configuration options. (v3)

[elogind.git] / man / systemd.socket.xml

diff --git a/man/systemd.socket.xml b/man/systemd.socket.xml
index 47ad91374808b0904dd17ab86ff65aa891254285..ae8497e8ab4c3a9b399f9f9999a44a9d56e0997c 100644 (file)
--- a/man/systemd.socket.xml
+++ b/man/systemd.socket.xml
@@ -9,16 +9,16 @@
   Copyright 2010 Lennart Poettering
 
   systemd is free software; you can redistribute it and/or modify it
   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
   (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/>.
 -->
 
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 -->
 


@@ -44,7 +44,7 @@
 
         <refnamediv>
                 <refname>systemd.socket</refname>
 
         <refnamediv>
                 <refname>systemd.socket</refname>

-                <refpurpose>systemd socket configuration files</refpurpose>
+                <refpurpose>Socket unit configuration</refpurpose>

         </refnamediv>
 
         <refsynopsisdiv>
         </refnamediv>
 
         <refsynopsisdiv>


@@ -76,7 +76,10 @@
                 <option>ExecStartPost=</option>,
                 <option>ExecStopPre=</option> and
                 <option>ExecStoptPost=</option> commands are executed
                 <option>ExecStartPost=</option>,
                 <option>ExecStopPre=</option> and
                 <option>ExecStoptPost=</option> commands are executed

-                in.</para>
+                in, and in
+                <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                which define the way the processes are
+                terminated.</para>

 
                 <para>For each socket file a matching service file
                 (see
 
                 <para>For each socket file a matching service file
                 (see


@@ -113,6 +116,17 @@
                 <para>Socket units may be used to implement on-demand
                 starting of services, as well as parallelized starting
                 of services.</para>
                 <para>Socket units may be used to implement on-demand
                 starting of services, as well as parallelized starting
                 of services.</para>

+
+                <para>Note that the daemon software configured for
+                socket activation with socket units needs to be able
+                to accept sockets from systemd, either via systemd's
+                native socket passing interface (see
+                <citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+                for details) or via the traditional
+                <citerefentry><refentrytitle>inetd</refentrytitle><manvolnum>8</manvolnum></citerefentry>-style
+                socket passing (i.e. sockets passed in via STDIN and
+                STDOUT, using <varname>StandardInput=socket</varname>
+                in the service file).</para>

         </refsect1>
 
         <refsect1>
         </refsect1>
 
         <refsect1>


@@ -123,7 +137,9 @@
                 supervises. A number of options that may be used in
                 this section are shared with other unit types. These
                 options are documented in
                 supervises. A number of options that may be used in
                 this section are shared with other unit types. These
                 options are documented in

-                <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The
+                <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                and
+                <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>. The

                 options specific to the [Socket] section of socket
                 units are the following:</para>
 
                 options specific to the [Socket] section of socket
                 units are the following:</para>
 


@@ -134,9 +150,9 @@
                                 <term><varname>ListenSequentialPacket=</varname></term>
                                 <listitem><para>Specifies an address
                                 to listen on for a stream
                                 <term><varname>ListenSequentialPacket=</varname></term>
                                 <listitem><para>Specifies an address
                                 to listen on for a stream

-                                (SOCK_STREAM), datagram (SOCK_DGRAM)
-                                resp. sequential packet
-                                (SOCK_SEQPACKET) socket. The address
+                                (SOCK_STREAM), datagram (SOCK_DGRAM),
+                                or sequential packet
+                                (SOCK_SEQPACKET) socket, respectively. The address

                                 can be written in various formats:</para>
 
                                 <para>If the address starts with a
                                 can be written in various formats:</para>
 
                                 <para>If the address starts with a


@@ -145,7 +161,7 @@
                                 family.</para>
 
                                 <para>If the address starts with an
                                 family.</para>
 
                                 <para>If the address starts with an

-                                ampersand (@) it is read as abstract
+                                at symbol (@) it is read as abstract

                                 namespace socket in the AF_UNIX
                                 family. The @ is replaced with a NUL
                                 character before binding. For details
                                 namespace socket in the AF_UNIX
                                 family. The @ is replaced with a NUL
                                 character before binding. For details


@@ -154,8 +170,13 @@
 
                                 <para>If the address string is a
                                 single number it is read as port
 
                                 <para>If the address string is a
                                 single number it is read as port

-                                number to listen on for both IPv4 and
-                                IPv6.</para>
+                                number to listen on via
+                                IPv6. Depending on the value of
+                                <varname>BindIPv6Only=</varname> (see below) this
+                                might result in the service being
+                                available via both IPv6 and IPv4 (default) or
+                                just via IPv6.
+                                </para>

 
                                 <para>If the address string is a
                                 string in the format v.w.x.y:z it is
 
                                 <para>If the address string is a
                                 string in the format v.w.x.y:z it is


@@ -165,7 +186,12 @@
 
                                 <para>If the address string is a
                                 string in the format [x]:y it is read
 
                                 <para>If the address string is a
                                 string in the format [x]:y it is read

-                                as IPv6 address x on a port y.</para>
+                                as IPv6 address x on a port y. Note
+                                that this might make the service
+                                available via IPv4, too, depending on
+                                the <varname>BindIPv6Only=</varname>
+                                setting (see below).
+                                </para>

 
                                 <para>Note that SOCK_SEQPACKET
                                 (i.e. <varname>ListenSequentialPacket=</varname>)
 
                                 <para>Note that SOCK_SEQPACKET
                                 (i.e. <varname>ListenSequentialPacket=</varname>)


@@ -201,12 +227,57 @@
                                 <listitem><para>Specifies a file
                                 system FIFO to listen on. This expects
                                 an absolute file system path as
                                 <listitem><para>Specifies a file
                                 system FIFO to listen on. This expects
                                 an absolute file system path as

-                                argument. Behaviour otherwise is very
+                                argument. Behavior otherwise is very

                                 similar to the
                                 <varname>ListenDatagram=</varname>
                                 directive above.</para></listitem>
                         </varlistentry>
 
                                 similar to the
                                 <varname>ListenDatagram=</varname>
                                 directive above.</para></listitem>
                         </varlistentry>
 

+                        <varlistentry>
+                                <term><varname>ListenSpecial=</varname></term>
+                                <listitem><para>Specifies a special
+                                file in the file system to listen
+                                on. This expects an absolute file
+                                system path as argument. Behavior
+                                otherwise is very similar to the
+                                <varname>ListenFIFO=</varname>
+                                directive above. Use this to open
+                                character device nodes as well as
+                                special files in
+                                <filename>/proc</filename> and
+                                <filename>/sys</filename>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>ListenNetlink=</varname></term>
+                                <listitem><para>Specifies a Netlink
+                                family to create a socket for to
+                                listen on. This expects a short string
+                                referring to the AF_NETLINK family
+                                name (such as <varname>audit</varname>
+                                or <varname>kobject-uevent</varname>)
+                                as argument, optionally suffixed by a
+                                whitespace followed by a multicast
+                                group integer. Behavior otherwise is
+                                very similar to the
+                                <varname>ListenDatagram=</varname>
+                                directive above.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>ListenMessageQueue=</varname></term>
+                                <listitem><para>Specifies a POSIX
+                                message queue name to listen on. This
+                                expects a valid message queue name
+                                (i.e. beginning with /). Behavior
+                                otherwise is very similar to the
+                                <varname>ListenFIFO=</varname>
+                                directive above. On Linux message
+                                queue descriptors are actually file
+                                descriptors and can be inherited
+                                between processes.</para></listitem>
+                        </varlistentry>
+

                         <varlistentry>
                                 <term><varname>BindIPv6Only=</varname></term>
                                 <listitem><para>Takes a one of
                         <varlistentry>
                                 <term><varname>BindIPv6Only=</varname></term>
                                 <listitem><para>Takes a one of


@@ -225,7 +296,10 @@
                                 default, surprise!) the system wide
                                 default setting is used, as controlled
                                 by
                                 default, surprise!) the system wide
                                 default setting is used, as controlled
                                 by

-                                <filename>/proc/sys/net/ipv6/bindv6only</filename>.</para>
+                                <filename>/proc/sys/net/ipv6/bindv6only</filename>,
+                                which in turn defaults to the
+                                equivalent of
+                                <option>both</option>.</para>

                                 </listitem>
                         </varlistentry>
 
                                 </listitem>
                         </varlistentry>
 


@@ -360,9 +434,9 @@
                                 <term><varname>SendBuffer=</varname></term>
                                 <listitem><para>Takes an integer
                                 argument controlling the receive
                                 <term><varname>SendBuffer=</varname></term>
                                 <listitem><para>Takes an integer
                                 argument controlling the receive

-                                resp. send buffer sizes of this
-                                socket. This controls the SO_RCVBUF
-                                resp. SO_SNDBUF socket options (see
+                                or send buffer sizes of this
+                                socket, respectively. This controls the SO_RCVBUF
+                                and SO_SNDBUF socket options (see

                                 <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry>
                                 for details.).</para></listitem>
                         </varlistentry>
                                 <citerefentry><refentrytitle>socket</refentrytitle><manvolnum>7</manvolnum></citerefentry>
                                 for details.).</para></listitem>
                         </varlistentry>


@@ -410,6 +484,26 @@
                                 for details.</para></listitem>
                         </varlistentry>
 
                                 for details.</para></listitem>
                         </varlistentry>
 

+                        <varlistentry>
+                                <term><varname>SmackLabel=</varname></term>
+                                <term><varname>SmackLabelIPIn=</varname></term>
+                                <term><varname>SmackLabelIPOut=</varname></term>
+                                <listitem><para>Takes a string
+                                value. Controls the extended
+                                attributes
+                                <literal>security.SMACK64</literal>,
+                                <literal>security.SMACK64IPIN</literal>
+                                and
+                                <literal>security.SMACK64IPOUT</literal>,
+                                respectively, i.e. the security label
+                                of the FIFO, or the security label for
+                                the incoming or outgoing connections
+                                of the socket, respectively.  See
+                                <ulink
+                                url="https://www.kernel.org/doc/Documentation/security/Smack.txt">Smack.txt</ulink>
+                                for details.</para></listitem>
+                        </varlistentry>
+

                         <varlistentry>
                                 <term><varname>PipeSize=</varname></term>
                                 <listitem><para>Takes an integer
                         <varlistentry>
                                 <term><varname>PipeSize=</varname></term>
                                 <listitem><para>Takes an integer


@@ -420,6 +514,19 @@
                                 for details.</para></listitem>
                         </varlistentry>
 
                                 for details.</para></listitem>
                         </varlistentry>
 

+                        <varlistentry>
+                                <term><varname>MessageQueueMaxMessages=</varname>,
+                                <varname>MessageQueueMessageSize=</varname></term>
+                                <listitem><para>These two settings
+                                take integer values and control the
+                                mq_maxmsg field or the mq_msgsize field, respectively, when
+                                creating the message queue. Note that
+                                either none or both of these variables
+                                need to be set. See
+                                <citerefentry><refentrytitle>mq_setattr</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+                                for details.</para></listitem>
+                        </varlistentry>
+

                         <varlistentry>
                                 <term><varname>FreeBind=</varname></term>
                                 <listitem><para>Takes a boolean
                         <varlistentry>
                                 <term><varname>FreeBind=</varname></term>
                                 <listitem><para>Takes a boolean


@@ -437,6 +544,46 @@
                                 address. Defaults to <option>false</option>.</para></listitem>
                         </varlistentry>
 
                                 address. Defaults to <option>false</option>.</para></listitem>
                         </varlistentry>
 

+                        <varlistentry>
+                                <term><varname>Transparent=</varname></term>
+                                <listitem><para>Takes a boolean
+                                value. Controls the IP_TRANSPARENT
+                                socket option. Defaults to
+                                <option>false</option>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>Broadcast=</varname></term>
+                                <listitem><para>Takes a boolean
+                                value. This controls the SO_BROADCAST
+                                socket option, which allows broadcast
+                                datagrams to be sent from this
+                                socket. Defaults to
+                                <option>false</option>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>PassCredentials=</varname></term>
+                                <listitem><para>Takes a boolean
+                                value. This controls the SO_PASSCRED
+                                socket option, which allows AF_UNIX sockets to
+                                receive the credentials of the sending
+                                process in an ancillary message.
+                                Defaults to
+                                <option>false</option>.</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
+                                <term><varname>PassSecurity=</varname></term>
+                                <listitem><para>Takes a boolean
+                                value. This controls the SO_PASSSEC
+                                socket option, which allows AF_UNIX
+                                sockets to receive the security
+                                context of the sending process in an
+                                ancillary message.  Defaults to
+                                <option>false</option>.</para></listitem>
+                        </varlistentry>
+

                         <varlistentry>
                                 <term><varname>TCPCongestion=</varname></term>
                                 <listitem><para>Takes a string
                         <varlistentry>
                                 <term><varname>TCPCongestion=</varname></term>
                                 <listitem><para>Takes a string


@@ -454,9 +601,9 @@
                                 <term><varname>ExecStartPost=</varname></term>
                                 <listitem><para>Takes one or more
                                 command lines, which are executed
                                 <term><varname>ExecStartPost=</varname></term>
                                 <listitem><para>Takes one or more
                                 command lines, which are executed

-                                before (resp. after) the listening
+                                before or after the listening

                                 sockets/FIFOs are created and
                                 sockets/FIFOs are created and

-                                bound. The first token of the command
+                                bound, respectively. The first token of the command

                                 line must be an absolute file name,
                                 then followed by arguments for the
                                 process. Multiple command lines may be
                                 line must be an absolute file name,
                                 then followed by arguments for the
                                 process. Multiple command lines may be


@@ -470,9 +617,9 @@
                                 <term><varname>ExecStopPre=</varname></term>
                                 <term><varname>ExecStopPost=</varname></term>
                                 <listitem><para>Additional commands
                                 <term><varname>ExecStopPre=</varname></term>
                                 <term><varname>ExecStopPost=</varname></term>
                                 <listitem><para>Additional commands

-                                that are executed before (resp. after)
+                                that are executed before or after

                                 the listening sockets/FIFOs are closed
                                 the listening sockets/FIFOs are closed

-                                and removed. Multiple command lines
+                                and removed, respectively. Multiple command lines

                                 may be specified following the same
                                 scheme as used for
                                 <varname>ExecStartPre=</varname> of
                                 may be specified following the same
                                 scheme as used for
                                 <varname>ExecStartPre=</varname> of


@@ -494,37 +641,12 @@
                                 will be terminated forcibly via
                                 SIGTERM, and after another delay of
                                 this time with SIGKILL. (See
                                 will be terminated forcibly via
                                 SIGTERM, and after another delay of
                                 this time with SIGKILL. (See

-                                <option>KillMode=</option> below.)
+                                <option>KillMode=</option> in <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>.)

                                 Takes a unit-less value in seconds, or
                                 a time span value such as "5min
                                 20s". Pass 0 to disable the timeout
                                 logic. Defaults to
                                 Takes a unit-less value in seconds, or
                                 a time span value such as "5min
                                 20s". Pass 0 to disable the timeout
                                 logic. Defaults to

-                                60s.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>KillMode=</varname></term>
-                                <listitem><para>Specifies how
-                                processes of this socket unit shall be
-                                killed. One of
-                                <option>control-group</option>,
-                                <option>process-group</option>,
-                                <option>process</option>,
-                                <option>none</option>.</para>
-
-                                <para>This option is mostly equivalent
-                                to the <option>KillMode=</option>
-                                option of service files. See
-                                <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
-                                for details.</para></listitem>
-                        </varlistentry>
-
-                        <varlistentry>
-                                <term><varname>KillSignal=</varname></term>
-                                <listitem><para>Specifies which signal
-                                to use when killing a process of this
-                                socket. Defaults to SIGTERM.
-                                </para></listitem>
+                                90s.</para></listitem>

                         </varlistentry>
 
                         <varlistentry>
                         </varlistentry>
 
                         <varlistentry>


@@ -539,6 +661,13 @@
                         </varlistentry>
 
                 </variablelist>
                         </varlistentry>
 
                 </variablelist>

+
+                <para>Check
+                <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                and
+                <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+                for more settings.</para>
+

         </refsect1>
 
         <refsect1>
         </refsect1>
 
         <refsect1>


@@ -548,6 +677,7 @@
                           <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemctl</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
                           <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

+                          <citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>,

                           <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                   </para>
         </refsect1>
                           <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
                   </para>
         </refsect1>