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https://github.com/systemd/systemd
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0c69794138
These lines are generally out-of-date, incomplete and unnecessary. With SPDX and git repository much more accurate and fine grained information about licensing and authorship is available, hence let's drop the per-file copyright notice. Of course, removing copyright lines of others is problematic, hence this commit only removes my own lines and leaves all others untouched. It might be nicer if sooner or later those could go away too, making git the only and accurate source of authorship information.
128 lines
5.2 KiB
XML
128 lines
5.2 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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SPDX-License-Identifier: LGPL-2.1+
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-->
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<refentry id="sd_journal_get_cutoff_realtime_usec" xmlns:xi="http://www.w3.org/2001/XInclude">
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<refentryinfo>
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<title>sd_journal_get_cutoff_realtime_usec</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>Developer</contrib>
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<firstname>Lennart</firstname>
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<surname>Poettering</surname>
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<email>lennart@poettering.net</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd_journal_get_cutoff_realtime_usec</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_journal_get_cutoff_realtime_usec</refname>
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<refname>sd_journal_get_cutoff_monotonic_usec</refname>
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<refpurpose>Read cut-off timestamps from the current journal entry</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-journal.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>sd_journal_get_cutoff_realtime_usec</function></funcdef>
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<paramdef>sd_journal *<parameter>j</parameter></paramdef>
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<paramdef>uint64_t *<parameter>from</parameter></paramdef>
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<paramdef>uint64_t *<parameter>to</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_journal_get_cutoff_monotonic_usec</function></funcdef>
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<paramdef>sd_journal *<parameter>j</parameter></paramdef>
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<paramdef>sd_id128_t <parameter>boot_id</parameter></paramdef>
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<paramdef>uint64_t *<parameter>from</parameter></paramdef>
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<paramdef>uint64_t *<parameter>to</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><function>sd_journal_get_cutoff_realtime_usec()</function>
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retrieves the realtime (wallclock) timestamps of the first and
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last entries accessible in the journal. It takes three arguments:
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the journal context object <parameter>j</parameter> and two
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pointers <parameter>from</parameter> and <parameter>to</parameter>
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pointing at 64-bit unsigned integers to store the timestamps in.
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The timestamps are in microseconds since the epoch, i.e.
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<constant>CLOCK_REALTIME</constant>. Either one of the two
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timestamp arguments may be passed as <constant>NULL</constant> in
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case the timestamp is not needed, but not both.</para>
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<para><function>sd_journal_get_cutoff_monotonic_usec()</function>
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retrieves the monotonic timestamps of the first and last entries
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accessible in the journal. It takes three arguments: the journal
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context object <parameter>j</parameter>, a 128-bit identifier for
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the boot <parameter>boot_id</parameter>, and two pointers to
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64-bit unsigned integers to store the timestamps,
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<parameter>from</parameter> and <parameter>to</parameter>. The
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timestamps are in microseconds since boot-up of the specific boot,
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i.e. <constant>CLOCK_MONOTONIC</constant>. Since the monotonic
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clock begins new with every reboot it only defines a well-defined
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point in time when used together with an identifier identifying
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the boot, see
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<citerefentry><refentrytitle>sd_id128_get_boot</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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for more information. The function will return the timestamps for
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the boot identified by the passed boot ID. Either one of the two
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timestamp arguments may be passed as <constant>NULL</constant> in
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case the timestamp is not needed, but not both.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para><function>sd_journal_get_cutoff_realtime_usec()</function>
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and <function>sd_journal_get_cutoff_monotonic_usec()</function>
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return 1 on success, 0 if not suitable entries are in the journal
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or a negative errno-style error code.</para>
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<para>Locations pointed to by parameters
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<parameter>from</parameter> and <parameter>to</parameter> will be
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set only if the return value is positive, and obviously, the
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parameters are non-null.</para>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>All functions listed here are thread-agnostic and only a single thread may operate
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on a given <structname>sd_journal</structname> object.</para>
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<xi:include href="libsystemd-pkgconfig.xml" xpointer="pkgconfig-text"/>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_journal_open</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_journal_get_realtime_usec</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_get_boot</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>clock_gettime</refentrytitle><manvolnum>2</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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