man/systemd-coredumpctl.xml

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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
        "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">

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<refentry id="systemd-coredumpctl" conditional='ENABLE_COREDUMP'
          xmlns:xi="http://www.w3.org/2001/XInclude">

        <refentryinfo>
                <title>systemd-coredumpctl</title>
                <productname>systemd</productname>

                <authorgroup>
                        <author>
                                <contrib>Developer</contrib>
                                <firstname>Zbigniew</firstname>
                                <surname>Jędrzejewski-Szmek</surname>
                                <email>zbyszek@in.waw.pl</email>
                        </author>
                </authorgroup>
        </refentryinfo>

        <refmeta>
                <refentrytitle>systemd-coredumpctl</refentrytitle>
                <manvolnum>1</manvolnum>
        </refmeta>

        <refnamediv>
                <refname>systemd-coredumpctl</refname>
                <refpurpose>Retrieve coredumps from the journal</refpurpose>
        </refnamediv>

        <refsynopsisdiv>
                <cmdsynopsis>
                        <command>systemd-coredumpctl</command>
                        <arg choice="opt" rep="repeat">OPTIONS</arg>
                        <arg choice="req">COMMAND</arg>
                        <arg choice="opt" rep="repeat">PID|COMM|EXE|MATCH</arg>
                </cmdsynopsis>
        </refsynopsisdiv>

        <refsect1>
                <title>Description</title>

                <para><command>systemd-coredumpctl</command> may be used to
                retrieve coredumps from
                <citerefentry><refentrytitle>systemd-journald</refentrytitle><manvolnum>8</manvolnum></citerefentry>.</para>
        </refsect1>

        <refsect1>
                <title>Options</title>

                <para>The following options are understood:</para>

                <variablelist>
                        <varlistentry>
                                <term><option>-F</option></term>
                                <term><option>--field=</option></term>

                                <listitem><para>Print all possible
                                data values the specified field
                                takes in matching coredump entries of the
                                journal.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>-o</option></term>
                                <term><option>--output=FILE</option></term>

                                <listitem><para>Write the core to
                                <option>FILE</option>.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><option>--no-legend</option></term>

                                <listitem><para>Do not print the column headers.
                                </para></listitem>
                        </varlistentry>

                        <xi:include href="standard-options.xml" xpointer="help" />
                        <xi:include href="standard-options.xml" xpointer="version" />
                        <xi:include href="standard-options.xml" xpointer="no-pager" />
                </variablelist>

                <para>The following commands are understood:</para>

                <variablelist>
                        <varlistentry>
                                <term><command>list</command></term>

                                <listitem><para>List coredumps captured in the journal
                                matching specified characteristics.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><command>dump</command></term>

                                <listitem><para>Extract the last coredump
                                matching specified characteristics.
                                The coredump will be written on standard output,
                                unless an output file is specified with
                                <option>-o/--output</option>.
                                </para></listitem>
                        </varlistentry>


                        <varlistentry>
                                <term><command>gdb</command></term>

                                <listitem><para>Invoke the GNU
                                debugger on the last coredump matching
                                specified characteristics.
                                </para></listitem>
                        </varlistentry>

                </variablelist>

        </refsect1>

        <refsect1>
                <title>Matching</title>

                <para>Match can be:</para>

                <variablelist>
                        <varlistentry>
                                <term><replaceable>PID</replaceable></term>

                                <listitem><para>Process ID of the
                                process that dumped
                                core. An integer.</para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><replaceable>COMM</replaceable></term>

                                <listitem><para>Name of the executable
                                (matches <option>COREDUMP_COMM=</option>).
                                Must not contain slashes.
                                </para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><replaceable>EXE</replaceable></term>

                                <listitem><para>Path to the executable
                                (matches <option>COREDUMP_EXE=</option>).
                                Must contain at least one slash.
                                </para></listitem>
                        </varlistentry>

                        <varlistentry>
                                <term><replaceable>MATCH</replaceable></term>

                                <listitem><para>General journalctl predicates
                                (see <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>).
                                Must contain an equals sign.
                                </para></listitem>
                        </varlistentry>
                </variablelist>
        </refsect1>

        <refsect1>
                <title>Exit status</title>
                <para>On success, 0 is returned; otherwise, a non-zero failure
                code is returned. Not finding any matching coredumps is treated
                as failure.
                </para>
        </refsect1>

        <refsect1>
                <title>See Also</title>
                <para>
                        <citerefentry><refentrytitle>systemd-journald.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>,
                        <citerefentry><refentrytitle>gdb</refentrytitle><manvolnum>1</manvolnum></citerefentry>
                </para>
        </refsect1>

</refentry>