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diff --git a/man/sd_journal_enumerate_fields.xml b/man/sd_journal_enumerate_fields.xml deleted file mode 100644 index fa5884106b..0000000000 --- a/man/sd_journal_enumerate_fields.xml +++ /dev/null @@ -1,161 +0,0 @@ -<?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 Lennart Poettering - - 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_enumerate_fields"> - - <refentryinfo> - <title>sd_journal_enumerate_fields</title> - <productname>systemd</productname> - - <authorgroup> - <author> - <contrib>Developer</contrib> - <firstname>Lennart</firstname> - <surname>Poettering</surname> - <email>lennart@poettering.net</email> - </author> - </authorgroup> - </refentryinfo> - - <refmeta> - <refentrytitle>sd_journal_enumerate_fields</refentrytitle> - <manvolnum>3</manvolnum> - </refmeta> - - <refnamediv> - <refname>sd_journal_enumerate_fields</refname> - <refname>sd_journal_restart_fields</refname> - <refname>SD_JOURNAL_FOREACH_FIELD</refname> - <refpurpose>Read used field names from the journal</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcsynopsisinfo>#include <systemd/sd-journal.h></funcsynopsisinfo> - - <funcprototype> - <funcdef>int <function>sd_journal_enumerate_fields</function></funcdef> - <paramdef>sd_journal *<parameter>j</parameter></paramdef> - <paramdef>const char **<parameter>field</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>void <function>sd_journal_restart_fields</function></funcdef> - <paramdef>sd_journal *<parameter>j</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef><function>SD_JOURNAL_FOREACH_FIELD</function></funcdef> - <paramdef>sd_journal *<parameter>j</parameter></paramdef> - <paramdef>const char *<parameter>field</parameter></paramdef> - </funcprototype> - - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Description</title> - - <para><function>sd_journal_enumerate_fields()</function> may be used to iterate through all field names used in the - opened journal files. On each invocation the next field name is returned. The order of the returned field names is - not defined. It takes two arguments: the journal context object, plus a pointer to a constant string pointer where - the field name is stored in. The returned data is in a read-only memory map and is only valid until the next - invocation of <function>sd_journal_enumerate_fields()</function>. Note that this call is subject to the data field - size threshold as controlled by <function>sd_journal_set_data_threshold()</function>.</para> - - <para><function>sd_journal_restart_fields()</function> resets the field name enumeration index to the beginning of - the list. The next invocation of <function>sd_journal_enumerate_fields()</function> will return the first field - name again.</para> - - <para>The <function>SD_JOURNAL_FOREACH_FIELD()</function> macro may be used as a handy wrapper around - <function>sd_journal_restart_fields()</function> and <function>sd_journal_enumerate_fields()</function>.</para> - - <para>These functions currently are not influenced by matches set with <function>sd_journal_add_match()</function> - but this might change in a later version of this software.</para> - - <para>To retrieve the possible values a specific field can take use - <citerefentry><refentrytitle>sd_journal_query_unique</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para> - </refsect1> - - <refsect1> - <title>Return Value</title> - - <para><function>sd_journal_enumerate_fields()</function> returns a - positive integer if the next field name has been read, 0 when no - more field names are known, or a negative errno-style error code. - <function>sd_journal_restart_fields()</function> returns - nothing.</para> - </refsect1> - - <refsect1> - <title>Notes</title> - - <para>The <function>sd_journal_enumerate_fields()</function> and <function>sd_journal_restart_fields()</function> - interfaces are available as a shared library, which can be compiled and linked to with the - <constant>libsystemd</constant> <citerefentry - project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> file.</para> - </refsect1> - - <refsect1> - <title>Examples</title> - - <para>Use the <function>SD_JOURNAL_FOREACH_FIELD</function> macro to iterate through all field names in use in the - current journal.</para> - - <programlisting>#include <stdio.h> -#include <string.h> -#include <systemd/sd-journal.h> - -int main(int argc, char *argv[]) { - sd_journal *j; - const char *field; - int r; - - r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY); - if (r < 0) { - fprintf(stderr, "Failed to open journal: %s\n", strerror(-r)); - return 1; - } - SD_JOURNAL_FOREACH_FIELD(j, field) - printf("%s\n", field); - sd_journal_close(j); - return 0; -}</programlisting> - - </refsect1> - - <refsect1> - <title>See Also</title> - - <para> - <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, - <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</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_query_unique</refentrytitle><manvolnum>3</manvolnum></citerefentry>, - <citerefentry><refentrytitle>sd_journal_get_data</refentrytitle><manvolnum>3</manvolnum></citerefentry>, - <citerefentry><refentrytitle>sd_journal_add_match</refentrytitle><manvolnum>3</manvolnum></citerefentry> - </para> - </refsect1> - -</refentry> |