Adding upstream version 247.3.upstream/247.3upstream

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

1 files changed, 114 insertions, 0 deletions

diff --git a/man/sd_journal_get_cursor.xml b/man/sd_journal_get_cursor.xml
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+<?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_cursor" xmlns:xi="http://www.w3.org/2001/XInclude">
+
+  <refentryinfo>
+    <title>sd_journal_get_cursor</title>
+    <productname>systemd</productname>
+  </refentryinfo>
+
+  <refmeta>
+    <refentrytitle>sd_journal_get_cursor</refentrytitle>
+    <manvolnum>3</manvolnum>
+  </refmeta>
+
+  <refnamediv>
+    <refname>sd_journal_get_cursor</refname>
+    <refname>sd_journal_test_cursor</refname>
+    <refpurpose>Get cursor string for or test cursor string against the current journal entry</refpurpose>
+  </refnamediv>
+
+  <refsynopsisdiv>
+    <funcsynopsis>
+      <funcsynopsisinfo>#include &lt;systemd/sd-journal.h&gt;</funcsynopsisinfo>
+
+      <funcprototype>
+        <funcdef>int <function>sd_journal_get_cursor</function></funcdef>
+        <paramdef>sd_journal *<parameter>j</parameter></paramdef>
+        <paramdef>char **<parameter>cursor</parameter></paramdef>
+      </funcprototype>
+
+      <funcprototype>
+        <funcdef>int <function>sd_journal_test_cursor</function></funcdef>
+        <paramdef>sd_journal *<parameter>j</parameter></paramdef>
+        <paramdef>const char *<parameter>cursor</parameter></paramdef>
+      </funcprototype>
+
+    </funcsynopsis>
+  </refsynopsisdiv>
+
+  <refsect1>
+    <title>Description</title>
+
+    <para><function>sd_journal_get_cursor()</function> returns a
+    cursor string for the current journal entry. A cursor is a
+    serialization of the current journal position formatted as text.
+    The string only contains printable characters and can be passed
+    around in text form. The cursor identifies a journal entry
+    globally and in a stable way and may be used to later seek to it
+    via
+    <citerefentry><refentrytitle>sd_journal_seek_cursor</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
+    The cursor string should be considered opaque and not be parsed by
+    clients. Seeking to a cursor position without the specific entry
+    being available locally will seek to the next closest (in terms of
+    time) available entry. The call takes two arguments: a journal
+    context object and a pointer to a string pointer where the cursor
+    string will be placed. The string is allocated via libc
+    <citerefentry project='man-pages'><refentrytitle>malloc</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    and should be freed after use with
+    <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
+
+    <para>Note that <function>sd_journal_get_cursor()</function> 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>
+
+    <para><function>sd_journal_test_cursor()</function>
+    may be used to check whether the current position in
+    the journal matches the specified cursor. This is
+    useful since cursor strings do not uniquely identify
+    an entry: the same entry might be referred to by
+    multiple different cursor strings, and hence string
+    comparing cursors is not possible. Use this call to
+    verify after an invocation of
+    <citerefentry><refentrytitle>sd_journal_seek_cursor</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    whether the entry being sought to was actually found
+    in the journal or the next closest entry was used
+    instead.</para>
+  </refsect1>
+
+  <refsect1>
+    <title>Return Value</title>
+
+    <para><function>sd_journal_get_cursor()</function> returns 0 on
+    success or a negative errno-style error code.
+    <function>sd_journal_test_cursor()</function> returns positive if
+    the current entry matches the specified cursor, 0 if it does not
+    match the specified cursor or a negative errno-style error code on
+    failure.</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_seek_cursor</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+    </para>
+  </refsect1>
+
+</refentry>