145 lines
6.9 KiB
XML
145 lines
6.9 KiB
XML
<?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_get_cutoff_realtime_usec">
|
||
|
||
<refentryinfo>
|
||
<title>sd_journal_get_cutoff_realtime_usec</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_get_cutoff_realtime_usec</refentrytitle>
|
||
<manvolnum>3</manvolnum>
|
||
</refmeta>
|
||
|
||
<refnamediv>
|
||
<refname>sd_journal_get_cutoff_realtime_usec</refname>
|
||
<refname>sd_journal_get_cutoff_monotonic_usec</refname>
|
||
<refpurpose>Read cut-off timestamps from the current journal entry</refpurpose>
|
||
</refnamediv>
|
||
|
||
<refsynopsisdiv>
|
||
<funcsynopsis>
|
||
<funcsynopsisinfo>#include <systemd/sd-journal.h></funcsynopsisinfo>
|
||
|
||
<funcprototype>
|
||
<funcdef>int <function>sd_journal_get_cutoff_realtime_usec</function></funcdef>
|
||
<paramdef>sd_journal *<parameter>j</parameter></paramdef>
|
||
<paramdef>uint64_t *<parameter>from</parameter></paramdef>
|
||
<paramdef>uint64_t *<parameter>to</parameter></paramdef>
|
||
</funcprototype>
|
||
|
||
<funcprototype>
|
||
<funcdef>int <function>sd_journal_get_cutoff_monotonic_usec</function></funcdef>
|
||
<paramdef>sd_journal *<parameter>j</parameter></paramdef>
|
||
<paramdef>sd_id128_t <parameter>boot_id</parameter></paramdef>
|
||
<paramdef>uint64_t *<parameter>from</parameter></paramdef>
|
||
<paramdef>uint64_t *<parameter>to</parameter></paramdef>
|
||
</funcprototype>
|
||
|
||
</funcsynopsis>
|
||
</refsynopsisdiv>
|
||
|
||
<refsect1>
|
||
<title>Description</title>
|
||
|
||
<para><function>sd_journal_get_cutoff_realtime_usec()</function>
|
||
gets the realtime (wallclock) timestamps of the first
|
||
and last entries accessible in the journal. It takes
|
||
three arguments: the journal context object and two
|
||
pointers to 64-bit unsigned integers to store the
|
||
timestamps in. The timestamps are in microseconds
|
||
since the epoch,
|
||
i.e. <constant>CLOCK_REALTIME</constant>. Either one
|
||
of the two timestamp arguments may be passed as
|
||
<constant>NULL</constant> in case the timestamp is not
|
||
needed, but not both.</para>
|
||
|
||
<para><function>sd_journal_get_cutoff_monotonic_usec()</function>
|
||
gets the monotonic timestamps of the first and last
|
||
entries accessible in the journal. It takes three
|
||
arguments: the journal context object, a 128-bit
|
||
identifier for the boot, and two pointers to 64-bit
|
||
unsigned integers to store the timestamps. The
|
||
timestamps are in microseconds since boot-up of the
|
||
specific boot,
|
||
i.e. <constant>CLOCK_MONOTONIC</constant>. Since the
|
||
monotonic clock begins new with every reboot it only
|
||
defines a well-defined point in time when used
|
||
together with an identifier identifying the boot, see
|
||
<citerefentry><refentrytitle>sd_id128_get_boot</refentrytitle><manvolnum>3</manvolnum></citerefentry>
|
||
for more information. The function will return the
|
||
timestamps for the boot identified by the passed boot
|
||
ID. Either one of the two timestamp arguments may be
|
||
passed as <constant>NULL</constant> in case the
|
||
timestamp is not needed, but not both.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Return Value</title>
|
||
|
||
<para><function>sd_journal_get_cutoff_realtime_usec()</function>
|
||
and
|
||
<function>sd_journal_get_cutoff_monotonic_usec()</function>
|
||
return 1 on success, 0 if not suitable entries are in
|
||
the journal or a negative errno-style error code.</para>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Notes</title>
|
||
|
||
<para>The
|
||
<function>sd_journal_get_cutoff_realtime_usec()</function>
|
||
and
|
||
<function>sd_journal_get_cutoff_monotonic_usec()</function>
|
||
interfaces are available as a shared library, which can
|
||
be compiled and linked to with the
|
||
<constant>libsystemd</constant> <citerefentry project='die-net'><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_open</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_journal_get_realtime_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>sd_id128_get_boot</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>clock_gettime</refentrytitle><manvolnum>2</manvolnum></citerefentry>
|
||
</para>
|
||
</refsect1>
|
||
|
||
</refentry>
|