</refnamediv>
<refsynopsisdiv>
- <para><filename>systemd.socket</filename></para>
+ <para><filename><replaceable>socket</replaceable>.socket</filename></para>
</refsynopsisdiv>
<refsect1>
<option>ExecStartPre=</option>,
<option>ExecStartPost=</option>,
<option>ExecStopPre=</option> and
- <option>ExecStoptPost=</option> commands are executed
+ <option>ExecStopPost=</option> commands are executed
in, and in
<citerefentry><refentrytitle>systemd.kill</refentrytitle><manvolnum>5</manvolnum></citerefentry>
which define the way the processes are
options specific to the [Socket] section of socket
units are the following:</para>
- <variablelist>
+ <variablelist class='unit-directives'>
<varlistentry>
<term><varname>ListenStream=</varname></term>
<term><varname>ListenDatagram=</varname></term>
<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
<para>These options may be specified
more than once in which case incoming
- traffic on any of the sockets will trigger
- service activation, and all listed
- sockets will be passed to the service,
- regardless whether there is incoming
- traffic on them or not.</para>
-
- <para>If an IP address is used here, it
- is often desirable to listen on it
+ traffic on any of the sockets will
+ trigger service activation, and all
+ listed sockets will be passed to the
+ service, regardless whether there is
+ incoming traffic on them or not. If
+ the empty string is assigned to any of
+ these options, the list of addresses
+ to listen on is reset, all prior uses
+ of any of these options will have no
+ effect.</para>
+
+ <para>If an IP address is used here,
+ it is often desirable to listen on it
before the interface it is configured
on is up and running, and even
regardless whether it will be up and
- running ever at all. To deal with this it is
- recommended to set the
+ running ever at all. To deal with this
+ it is recommended to set the
<varname>FreeBind=</varname> option
described below.</para></listitem>
</varlistentry>
<varlistentry>
<term><varname>DirectoryMode=</varname></term>
<listitem><para>If listening on a file
- system socket of FIFO, the parent
+ system socket or FIFO, the parent
directories are automatically created
if needed. This option specifies the
file system access mode used when
<varlistentry>
<term><varname>SocketMode=</varname></term>
<listitem><para>If listening on a file
- system socket of FIFO, this option
+ system socket or FIFO, this option
specifies the file system access mode
used when creating the file
node. Takes an access mode in octal
until at least one existing connection
is terminated. This setting has no
effect for sockets configured with
- <option>Accept=no</option> or datagram
+ <option>Accept=false</option> or datagram
sockets. Defaults to
64.</para></listitem>
</varlistentry>
<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>
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
<varname>MessageQueueMessageSize=</varname></term>
<listitem><para>These two settings
take integer values and control the
- mq_maxmsg resp. mq_msgsize field when
+ 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
<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
- 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
<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
- 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
<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>
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>systemd.directives</refentrytitle><manvolnum>7</manvolnum></citerefentry>
</para>
</refsect1>
~ianmdlvl / elogind.git / blobdiff