12b42c7667
This did not really work out as we had hoped. Trying to do this upstream introduced several problems that probably makes it better suited as a downstream patch after all. At any rate, it is not releaseable in the current state, so we at least need to revert this before the release. * by adjusting the path to binaries, but not do the same thing to the search path we end up with inconsistent man-pages. Adjusting the search path too would be quite messy, and it is not at all obvious that this is worth the effort, but at any rate it would have to be done before we could ship this. * this means that distributed man-pages does not make sense as they depend on config options, and for better or worse we are still distributing man pages, so that is something that definitely needs sorting out before we could ship with this patch. * we have long held that split-usr is only minimally supported in order to boot, and something we hope will eventually go away. So before we start adding even more magic/effort in order to make this work nicely, we should probably question if it makes sense at all.
146 lines
6 KiB
XML
146 lines
6 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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This file is part of systemd.
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Copyright 2012 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sd_journal_get_cutoff_realtime_usec">
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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>The
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<function>sd_journal_get_cutoff_realtime_usec()</function> and
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<function>sd_journal_get_cutoff_monotonic_usec()</function>
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interfaces are available as a shared library, which can be
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compiled and linked to with the
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<constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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file.</para>
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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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