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diff --git a/man/sd_journal_get_cutoff_realtime_usec.xml b/man/sd_journal_get_cutoff_realtime_usec.xml new file mode 100644 index 0000000..a39a656 --- /dev/null +++ b/man/sd_journal_get_cutoff_realtime_usec.xml @@ -0,0 +1,120 @@ +<?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>History</title> + <para><function>sd_journal_get_cutoff_realtime_usec()</function> and + <function>sd_journal_get_cutoff_monotonic_usec()</function> were added in version 187.</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> |