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man: Split sd_randomize(3) from sd_id128_get_{machine,boot}(3)
They have too little to do with each other...
This commit is contained in:
Lennart Poettering
parent
9a1d541663
commit
a4023a43d0
@ -498,6 +498,7 @@ MANPAGES = \
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man/sd-id128.3 \
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man/sd_id128_to_string.3 \
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man/sd_id128_randomize.3 \
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man/sd_id128_get_machine.3 \
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man/sd-journal.3 \
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man/sd_journal_print.3 \
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man/sd_journal_stream_fd.3 \
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@ -604,8 +605,7 @@ man/SD_ID128_FORMAT_STR.3: man/sd-id128.3
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man/SD_ID128_FORMAT_VAL.3: man/sd-id128.3
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man/sd_id128_equal.3: man/sd-id128.3
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man/sd_id128_from_string.3: man/sd_id128_to_string.3
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man/sd_id128_get_machine.3: man/sd_id128_randomize.3
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man/sd_id128_get_boot.3: man/sd_id128_randomize.3
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man/sd_id128_get_boot.3: man/sd_id128_get_machine.3
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man/sd_journal_printv.3: man/sd_journal_print.3
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man/sd_journal_send.3: man/sd_journal_print.3
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man/sd_journal_sendv.3: man/sd_journal_print.3
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@ -78,8 +78,9 @@
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</para>
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<para>See
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<citerefentry><refentrytitle>sd_id128_to_string</refentrytitle><manvolnum>3</manvolnum></citerefentry> and
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<citerefentry><refentrytitle>sd_id128_randomize</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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<citerefentry><refentrytitle>sd_id128_to_string</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_randomize</refentrytitle><manvolnum>3</manvolnum></citerefentry> and
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<citerefentry><refentrytitle>sd_id128_get_machine</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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for more information about the implemented
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functions.</para>
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@ -157,6 +158,7 @@
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_to_string</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_randomize</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_get_machine</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
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138
man/sd_id128_get_machine.xml
Normal file
138
man/sd_id128_get_machine.xml
Normal file
@ -0,0 +1,138 @@
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<?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_id128_get_machine">
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<refentryinfo>
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<title>sd_id128_get_machine</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_id128_get_machine</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_id128_get_machine</refname>
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<refname>sd_id128_get_boot</refname>
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<refpurpose>Retrieve 128 bit IDs</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-id128.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>sd_id128_get_machine</function></funcdef>
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<paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_id128_get_boot</function></funcdef>
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<paramdef>sd_id128_t* <parameter>ret</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_id128_get_machine()</function>
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returns the machine ID of the executing host. This
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reads and parses the
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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file. This function caches the machine ID internally
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to make retrieving the machine ID a cheap
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operation.</para>
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<para><function>sd_id128_get_boot()</function> returns
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the boot ID of the executing kernel. This reads and
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parses the
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<filename>/proc/sys/kernel/random/boot_id</filename>
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file exposed by the kernel. It is randomly generated
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early at boot and is unique for every running kernel
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instance. See
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<citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
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for more information. This function also internally
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caches the returned ID to make this call a cheap
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operation.</para>
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<para>Note that
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<function>sd_id128_get_boot()</function> always returns
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a UUID v4 compatible
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ID. <function>sd_id128_get_machine()</function> will
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also return a UUID v4 compatible ID on new
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installations, but might not on older. It is possible
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to convert the machine ID into an UUID v4 compatible
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one. For more information see
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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<para>For more information about the
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<literal>sd_id128_t</literal> type see
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<citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para>The two calls return 0 on success (in which
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case <parameter>ret</parameter> is filled in), or a
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negative errno-style error code.</para>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>The <function>sd_id128_get_machine()</function>
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and <function>sd_id128_get_boot()</function>
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interfaces are available as shared library, which can
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be compiled and linked to with the
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<literal>libsystemd-id128</literal>
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<citerefentry><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-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_randomize</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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@ -44,9 +44,7 @@
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<refnamediv>
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<refname>sd_id128_randomize</refname>
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<refname>sd_id128_get_machine</refname>
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<refname>sd_id128_get_boot</refname>
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<refpurpose>Generate or retrieve 128 bit IDs</refpurpose>
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<refpurpose>Generate 128 bit IDs</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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@ -58,16 +56,6 @@
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<paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_id128_get_machine</function></funcdef>
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<paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_id128_get_boot</function></funcdef>
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<paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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@ -81,36 +69,10 @@
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<filename>/dev/urandom</filename> kernel random number
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generator.</para>
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<para><function>sd_id128_get_machine()</function>
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returns the machine ID of the executing host. This
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reads and parses the
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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file. This function caches the machine ID internally
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to make retrieving the machine ID a cheap
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operation.</para>
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<para><function>sd_id128_get_boot()</function> returns
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the boot ID of the executing kernel. This reads and
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parses the
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<filename>/proc/sys/kernel/random/boot_id</filename>
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file exposed by the kernel. It is randomly generated
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early at boot and is unique for every running kernel
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instance. See
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<citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
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for more information. This function also internally
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caches the returned ID to make this call a cheap
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operation.</para>
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<para>Note that
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<function>sd_id128_randomize()</function> and
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<function>sd_id128_get_boot()</function> always return
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<function>sd_id128_randomize()</function> always returns
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a UUID v4 compatible
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ID. <function>sd_id128_get_machine()</function> will
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also return a UUID v4 compatible ID on new
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installations, but might not on older. It is possible
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to convert the machine ID into an UUID v4 compatible
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one. For more information see
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
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ID.</para>
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<para>For more information about the
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<literal>sd_id128_t</literal> type see
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@ -125,7 +87,7 @@
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<refsect1>
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<title>Return Value</title>
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<para>The three calls return 0 on success (in which
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<para>The call returns 0 on success (in which
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case <parameter>ret</parameter> is filled in), or a
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negative errno-style error code.</para>
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</refsect1>
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@ -133,10 +95,8 @@
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<refsect1>
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<title>Notes</title>
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<para>The <function>sd_id128_randomize()</function>,
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<function>sd_id128_get_machine()</function> and
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<function>sd_id128_get_boot()</function> interfaces
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are available as shared library, which can be compiled
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<para>The <function>sd_id128_randomize()</function> interface
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is available as shared library, which can be compiled
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and linked to with the
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<literal>libsystemd-id128</literal>
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<citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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@ -150,7 +110,8 @@
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
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<citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_id128_get_machine</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</para>
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</refsect1>
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