Commit 3bb55eee authored by Lennart Poettering's avatar Lennart Poettering

man: document sd_journal_open()

parent 4b261568
......@@ -500,7 +500,8 @@ MANPAGES = \
man/sd_id128_randomize.3 \
man/sd-journal.3 \
man/sd_journal_print.3 \
man/sd_journal_stream_fd.3
man/sd_journal_stream_fd.3 \
man/sd_journal_open.3
MANPAGES_ALIAS = \
man/reboot.8 \
......@@ -540,7 +541,9 @@ MANPAGES_ALIAS = \
man/sd_id128_get_boot.3 \
man/sd_journal_printv.3 \
man/sd_journal_send.3 \
man/sd_journal_sendv.3
man/sd_journal_sendv.3 \
man/sd_journal_open_directory.3 \
man/sd_journal_close.3
man/reboot.8: man/halt.8
man/poweroff.8: man/halt.8
......@@ -580,6 +583,8 @@ man/sd_id128_get_boot.3: man/sd_id128_randomize.3
man/sd_journal_printv.3: man/sd_journal_print.3
man/sd_journal_send.3: man/sd_journal_print.3
man/sd_journal_sendv.3: man/sd_journal_print.3
man/sd_journal_open_directory.3: man/sd_journal_open.3
man/sd_journal_close.3: man/sd_journal_open.3
XML_FILES = \
${patsubst %.1,%.xml,${patsubst %.3,%.xml,${patsubst %.5,%.xml,${patsubst %.7,%.xml,${patsubst %.8,%.xml,$(MANPAGES)}}}}}
......
<?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 2012 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_journal_open">
<refentryinfo>
<title>sd_journal_open</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_journal_open</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>sd_journal_open</refname>
<refname>sd_journal_open_directory</refname>
<refname>sd_journal_close</refname>
<refpurpose>Open the system journal for reading</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;systemd/sd-journal.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>sd_journal_open</function></funcdef>
<paramdef>sd_journal** <parameter>ret</parameter></paramdef>
<paramdef>int <parameter>flags</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_journal_open_directory</function></funcdef>
<paramdef>sd_journal** <parameter>ret</parameter></paramdef>
<paramdef>const char* <parameter>path</parameter></paramdef>
<paramdef>int <parameter>flags</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_journal_close</function></funcdef>
<paramdef>sd_journal* <parameter>j</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><function>sd_journal_open()</function> opens the
the log journal for reading. It will find all journal
files automatically and interleave them automatically
when reading. As first argument it takes a pointer to
a <literal>sd_journal</literal> pointer, which on
success will contain journal context afterwards. The
second argument is a flags field, which may consist of
the following flags ORed together:
<literal>SD_JOURNAL_LOCAL_ONLY</literal> makes sure
only journal files generated on the local machine will
be opened. <literal>SD_JOURNAL_RUNTIME_ONLY</literal>
makes sure only volatile journal files will be opened,
excluding those which are stored on persistant
storage. <literal>SD_JOURNAL_RUNTIME_ONLY</literal>
will ensure that only journal files of system services
and the kernel (in opposition to user session processes) will
be opened.</para>
<para><function>sd_journal_open_directory()</function>
is similar to <function>sd_journal_open()</function>
but takes an absolute directory path as argument. All
journal files in this directory will be opened and
interleaved automatically. This call also takes a
flags argument, but it must be passed as 0 as no flags
are currently understood for this call.</para>
<para><function>sd_journal_close()</function> will
close the journal context allocated with
<function>sd_journal_open()</function> or
<function>sd_journal_open_directory()</function> and
free its resources.</para>
<para>When opening the journal only journal files
accessible to the calling user will be opened. If
journal files are not accessible to the caller this
will be silently ignored.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
<para>The <function>sd_journal_open()</function> and
<function>sd_journal_open_directory()</function> calls
return 0 on success or a negative errno-style error
code. <function>sd_journal_close()</function> returns
nothing.</para>
</refsect1>
<refsect1>
<title>Notes</title>
<para>The <function>sd_journal_open()</function>,
<function>sd_journal_open_directory()</function> and
<function>sd_journal_close()</function> interfaces are
available as shared library, which can be compiled and
linked to with the
<literal>libsystemd-journal</literal>
<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
file.</para>
</refsect1>
<refsect1>
<title>See Also</title>
<para>
<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_next</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>sd_journal_get_data</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
</refentry>
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