+++ /dev/null
-<?xml version='1.0'?> <!--*-nxml-*-->
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
- "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-
-<!--
- This file is part of systemd.
-
- Copyright 2010 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- 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
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
--->
-
-<refentry id="sd-daemon"
- xmlns:xi="http://www.w3.org/2001/XInclude">
-
- <refentryinfo>
- <title>sd-daemon</title>
- <productname>systemd</productname>
-
- <authorgroup>
- <author>
- <contrib>Developer</contrib>
- <firstname>Lennart</firstname>
- <surname>Poettering</surname>
- <email>lennart@poettering.net</email>
- </author>
- </authorgroup>
- </refentryinfo>
-
- <refmeta>
- <refentrytitle>sd-daemon</refentrytitle>
- <manvolnum>3</manvolnum>
- </refmeta>
-
- <refnamediv>
- <refname>sd-daemon</refname>
- <refname>SD_EMERG</refname>
- <refname>SD_ALERT</refname>
- <refname>SD_CRIT</refname>
- <refname>SD_ERR</refname>
- <refname>SD_WARNING</refname>
- <refname>SD_NOTICE</refname>
- <refname>SD_INFO</refname>
- <refname>SD_DEBUG</refname>
- <refpurpose>APIs for
- new-style daemons</refpurpose>
- </refnamediv>
-
- <refsynopsisdiv>
- <funcsynopsis>
- <funcsynopsisinfo>#include <systemd/sd-daemon.h></funcsynopsisinfo>
- </funcsynopsis>
-
- <cmdsynopsis>
- <command>pkg-config --cflags --libs libsystemd</command>
- </cmdsynopsis>
-
- </refsynopsisdiv>
-
- <refsect1>
- <title>Description</title>
-
- <para><filename>sd-daemon.h</filename> provide APIs for new-style
- daemons, as implemented by the
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>
- init system.</para>
-
- <para>See
- <citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_booted</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_is_fifo</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_watchdog_enabled</refentrytitle><manvolnum>3</manvolnum></citerefentry>
- for more information about the functions implemented. In addition
- to these functions, a couple of logging prefixes are defined as
- macros:</para>
-
- <programlisting>#define SD_EMERG "<0>" /* system is unusable */
-#define SD_ALERT "<1>" /* action must be taken immediately */
-#define SD_CRIT "<2>" /* critical conditions */
-#define SD_ERR "<3>" /* error conditions */
-#define SD_WARNING "<4>" /* warning conditions */
-#define SD_NOTICE "<5>" /* normal but significant condition */
-#define SD_INFO "<6>" /* informational */
-#define SD_DEBUG "<7>" /* debug-level messages */</programlisting>
-
- <para>These prefixes are intended to be used in conjunction with
- stderr-based logging as implemented by systemd. If a systemd
- service definition file is configured with
- <varname>StandardError=journal</varname>,
- <varname>StandardError=syslog</varname> or
- <varname>StandardError=kmsg</varname>, these prefixes can be used
- to encode a log level in lines printed. This is similar to the
- kernel <function>printk()</function>-style logging. See
- <citerefentry><refentrytitle>klogctl</refentrytitle><manvolnum>2</manvolnum></citerefentry>
- for more information.</para>
-
- <para>The log levels are identical to
- <citerefentry project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>'s
- log level system. To use these prefixes simply prefix every line
- with one of these strings. A line that is not prefixed will be
- logged at the default log level SD_INFO.</para>
-
- <example>
- <title>Hello World</title>
-
- <para>A daemon may log with the log level NOTICE by issuing this
- call:</para>
-
- <programlisting>fprintf(stderr, SD_NOTICE "Hello World!\n");</programlisting>
- </example>
- </refsect1>
-
- <xi:include href="libsystemd-pkgconfig.xml" />
-
- <refsect1>
- <title>See Also</title>
- <para>
- <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_listen_fds</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_notify</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_booted</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_is_fifo</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>sd_watchdog_enabled</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.socket</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry project='man-pages'><refentrytitle>fprintf</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
- <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
- </para>
- </refsect1>
-
-</refentry>
~ianmdlvl / elogind.git / blobdiff