mirror of
https://github.com/AuxXxilium/eudev.git
synced 2024-12-19 13:08:42 +07:00
143 lines
6.8 KiB
XML
143 lines
6.8 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. CLOCK_REALTIME. Either one of
|
|
the two timestamp arguments may be passed as NULL 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. CLOCK_MONOTONIC. 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 NULL 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 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_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>
|