notification.</para>
<para>If the <parameter>unset_environment</parameter>
- parameter is non-zero <function>sd_notify()</function>
+ parameter is non-zero, <function>sd_notify()</function>
will unset the <varname>$NOTIFY_SOCKET</varname>
- environment variable before returning (regardless
+ environment variable before returning (regardless of
whether the function call itself succeeded or
not). Further calls to
<function>sd_notify()</function> will then fail, but
processes.</para>
<para>The <parameter>state</parameter> parameter
- should contain an newline-separated list of variable
+ should contain a newline-separated list of variable
assignments, similar in style to an environment
block. A trailing newline is implied if none is
specified. The string may contain any kind of variable
definition file has Type=notify
set. The passed argument is a boolean
"1" or "0". Since there is little
- value in signalling non-readiness, the
+ value in signaling non-readiness, the
only value daemons should send is
"READY=1".</para></listitem>
</varlistentry>
<citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
for details. It is recommended to send
this message if the
- <varname>WATCHDOG_USEC=</varname>
- environment variable has been set for
- the service process, in every half the
- time interval that is specified in the
- variable.</para></listitem>
+ <varname>$WATCHDOG_PID</varname>
+ environment variable has been set to
+ the PID of the service process, in
+ every half the time interval that is
+ specified in the
+ <varname>$WATCHDOG_USEC</varname>
+ environment variable. See
+ <citerefentry><refentrytitle>sd_watchdog_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for details.</para></listitem>
</varlistentry>
</variablelist>
errno-style error code. If
<varname>$NOTIFY_SOCKET</varname> was not set and
hence no status data could be sent, 0 is returned. If
- the status was sent these functions return with a
+ the status was sent, these functions return with a
positive return value. In order to support both, init
systems that implement this scheme and those which
- don't, it is generally recommended to ignore the return
+ do not, it is generally recommended to ignore the return
value of this call.</para>
</refsect1>
<para>Internally, these functions send a single
datagram with the state string as payload to the
- AF_UNIX socket referenced in the
+ <constant>AF_UNIX</constant> socket referenced in the
<varname>$NOTIFY_SOCKET</varname> environment
variable. If the first character of
- <varname>$NOTIFY_SOCKET</varname> is @ the string is
+ <varname>$NOTIFY_SOCKET</varname> is <literal>@</literal>, the string is
understood as Linux abstract namespace socket. The
datagram is accompanied by the process credentials of
the sending daemon, using SCM_CREDENTIALS.</para>
the reference implementation's
<filename>sd-daemon.c</filename> and
<filename>sd-daemon.h</filename> files. These
- interfaces are available as shared library, which can
+ interfaces are available as a shared library, which can
be compiled and linked to with the
- <literal>libsystemd-daemon</literal>
- <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ <constant>libsystemd-daemon</constant> <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
file. Alternatively, applications consuming these APIs
may copy the implementation into their source tree. For
- more details about the reference implementation see
+ more details about the reference implementation, see
<citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
<para>If the reference implementation is used as
drop-in files and -DDISABLE_SYSTEMD is set during
- compilation these functions will always return 0 and
+ compilation, these functions will always return 0 and
otherwise become a NOP.</para>
</refsect1>
<refsect1>
<title>Environment</title>
- <variablelist>
+ <variablelist class='environment-variables'>
<varlistentry>
<term><varname>$NOTIFY_SOCKET</varname></term>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-daemon</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>daemon</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>systemd.service</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_watchdog_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>