<?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"> <!-- This file is part of systemd. Copyright 2016 Jan Synáček systemd is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. systemd is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with systemd; If not, see <http://www.gnu.org/licenses/>. --> <refentry id="sd_journal_has_runtime_files"> <refentryinfo> <title>sd_journal_has_runtime_files</title> <productname>systemd</productname> <authorgroup> <author> <contrib>Developer</contrib> <firstname>Jan</firstname> <surname>Synáček</surname> <email>jan.synacek@gmail.com</email> </author> </authorgroup> </refentryinfo> <refmeta> <refentrytitle>sd_journal_has_runtime_files</refentrytitle> <manvolnum>3</manvolnum> </refmeta> <refnamediv> <refname>sd_journal_has_runtime_files</refname> <refname>sd_journal_has_persistent_files</refname> <refpurpose>Query availability of runtime or persistent journal files.</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcsynopsisinfo>#include <systemd/sd-journal.h></funcsynopsisinfo> <funcprototype> <funcdef>int <function>sd_journal_has_runtime_files</function></funcdef> <paramdef>sd_journal *<parameter>j</parameter></paramdef> </funcprototype> <funcprototype> <funcdef>int <function>sd_journal_has_persistent_files</function></funcdef> <paramdef>sd_journal *<parameter>j</parameter></paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1> <title>Description</title> <para><function>sd_journal_has_runtime_files()</function> returns a positive value if runtime journal files (present in /run/systemd/journal/) have been found. Otherwise returns 0.</para> <para><function>sd_journal_has_persistent_files()</function> returns a positive value if persistent journal files (present in /var/log/journal/) have been found. Otherwise returns 0.</para> </refsect1> <refsect1> <title>Return value</title> <para>Both <function>sd_journal_has_runtime_files()</function> and <function>sd_journal_has_persistent_files()</function> return -EINVAL if their argument is NULL. </para> </refsect1> <refsect1> <title>See Also</title> <para> <citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>3</manvolnum></citerefentry> </para> </refsect1> </refentry>