summaryrefslogtreecommitdiffstats
path: root/man/sd_journal_get_cutoff_realtime_usec.xml
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:35:18 +0000
commitb750101eb236130cf056c675997decbac904cc49 (patch)
treea5df1a06754bdd014cb975c051c83b01c9a97532 /man/sd_journal_get_cutoff_realtime_usec.xml
parentInitial commit. (diff)
downloadsystemd-b750101eb236130cf056c675997decbac904cc49.tar.xz
systemd-b750101eb236130cf056c675997decbac904cc49.zip
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'man/sd_journal_get_cutoff_realtime_usec.xml')
-rw-r--r--man/sd_journal_get_cutoff_realtime_usec.xml114
1 files changed, 114 insertions, 0 deletions
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..445130e
--- /dev/null
+++ b/man/sd_journal_get_cutoff_realtime_usec.xml
@@ -0,0 +1,114 @@
+<?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 &lt;systemd/sd-journal.h&gt;</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>