Adding upstream version 241.upstream/241upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 115 insertions, 0 deletions

diff --git a/man/sd_journal_get_realtime_usec.xml b/man/sd_journal_get_realtime_usec.xml
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+<?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">
+
+<!--
+  SPDX-License-Identifier: LGPL-2.1+
+-->
+
+<refentry id="sd_journal_get_realtime_usec"
+          xmlns:xi="http://www.w3.org/2001/XInclude">
+
+  <refentryinfo>
+    <title>sd_journal_get_realtime_usec</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>sd_journal_get_realtime_usec</refentrytitle>
+    <manvolnum>3</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>sd_journal_get_realtime_usec</refname>
+    <refname>sd_journal_get_monotonic_usec</refname>
+    <refpurpose>Read timestamps from the current journal entry</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcsynopsisinfo>#include &lt;systemd/sd-journal.h&gt;</funcsynopsisinfo>
+
+      <funcprototype>
+        <funcdef>int <function>sd_journal_get_realtime_usec</function></funcdef>
+        <paramdef>sd_journal *<parameter>j</parameter></paramdef>
+        <paramdef>uint64_t *<parameter>usec</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_journal_get_monotonic_usec</function></funcdef>
+        <paramdef>sd_journal *<parameter>j</parameter></paramdef>
+        <paramdef>uint64_t *<parameter>usec</parameter></paramdef>
+        <paramdef>sd_id128_t *<parameter>boot_id</parameter></paramdef>
+      </funcprototype>
+
+    </funcsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><function>sd_journal_get_realtime_usec()</function> gets the
+    realtime (wallclock) timestamp of the current journal entry. It
+    takes two arguments: the journal context object and a pointer to a
+    64-bit unsigned integer to store the timestamp in. The timestamp
+    is in microseconds since the epoch, i.e.
+    <constant>CLOCK_REALTIME</constant>.</para>
+
+    <para><function>sd_journal_get_monotonic_usec()</function> gets
+    the monotonic timestamp of the current journal entry. It takes
+    three arguments: the journal context object, a pointer to a 64-bit
+    unsigned integer to store the timestamp in, as well as a 128-bit
+    ID buffer to store the boot ID of the monotonic timestamp. The
+    timestamp is 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. If the boot ID parameter is passed
+    <constant>NULL</constant>, the function will fail if the monotonic
+    timestamp of the current entry is not of the current system
+    boot.</para>
+
+    <para>Note that these functions will not work before
+    <citerefentry><refentrytitle>sd_journal_next</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    (or related call) has been called at least
+    once, in order to position the read pointer at a valid entry.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Return Value</title>
+
+    <para><function>sd_journal_get_realtime_usec()</function> and
+    <function>sd_journal_get_monotonic_usec()</function> returns 0 on
+    success or a negative errno-style error code. If the boot ID
+    parameter was passed <constant>NULL</constant> and the monotonic
+    timestamp of the current journal entry is not of the current
+    system boot, <constant>-ESTALE</constant> is returned by
+    <function>sd_journal_get_monotonic_usec()</function>.</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_next</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+      <citerefentry><refentrytitle>sd_journal_get_data</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>,
+      <citerefentry><refentrytitle>sd_journal_get_cutoff_realtime_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>