mirror of
https://github.com/systemd/systemd.git
synced 2024-11-01 09:21:26 +03:00
115 lines
4.9 KiB
XML
115 lines
4.9 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
|
|
<refentry id="sd_journal_get_cutoff_realtime_usec" xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>sd_journal_get_cutoff_realtime_usec</title>
|
|
<productname>systemd</productname>
|
|
</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>
|
|
retrieves the realtime (wallclock) timestamps of the first and
|
|
last entries accessible in the journal. It takes three arguments:
|
|
the journal context object <parameter>j</parameter> and two
|
|
pointers <parameter>from</parameter> and <parameter>to</parameter>
|
|
pointing at 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>
|
|
retrieves the monotonic timestamps of the first and last entries
|
|
accessible in the journal. It takes three arguments: the journal
|
|
context object <parameter>j</parameter>, a 128-bit identifier for
|
|
the boot <parameter>boot_id</parameter>, and two pointers to
|
|
64-bit unsigned integers to store the timestamps,
|
|
<parameter>from</parameter> and <parameter>to</parameter>. 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>
|
|
|
|
<para>Locations pointed to by parameters
|
|
<parameter>from</parameter> and <parameter>to</parameter> will be
|
|
set only if the return value is positive, and obviously, the
|
|
parameters are non-null.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Notes</title>
|
|
|
|
<xi:include href="threads-aware.xml" xpointer="strict" />
|
|
|
|
<xi:include href="libsystemd-pkgconfig.xml" xpointer="pkgconfig-text"/>
|
|
</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>
|