<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>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 [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>)
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>
<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>
<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