man/systemd-getty-generator.8 \
man/systemd-system-update-generator.8 \
man/systemd-fstab-generator.8 \
- man/systemd.preset.5
+ man/systemd.preset.5 \
+ man/sd-id128.7 \
+ man/sd_id128_to_string.3 \
+ man/sd_id128_randomize.3
MANPAGES_ALIAS = \
man/reboot.8 \
man/systemd-ask-password-wall.path.8 \
man/systemd-tmpfiles-setup.service.8 \
man/systemd-tmpfiles-clean.service.8 \
- man/systemd-tmpfiles-clean.timer.8
+ man/systemd-tmpfiles-clean.timer.8 \
+ man/sd_id128_t.7 \
+ man/SD_ID128_MAKE.7 \
+ man/SD_ID128_FORMAT_STR.7 \
+ man/SD_ID128_FORMAT_VAL.7 \
+ man/sd_id128_equal.7 \
+ man/sd_id128_from_string.3 \
+ man/sd_id128_get_machine.3 \
+ man/sd_id128_get_boot.3
man/reboot.8: man/halt.8
man/poweroff.8: man/halt.8
man/systemd-tmpfiles-setup.service.8: man/systemd-tmpfiles.8
man/systemd-tmpfiles-clean.service.8: man/systemd-tmpfiles.8
man/systemd-tmpfiles-clean.timer.8: man/systemd-tmpfiles.8
+man/sd_id128_t.7: man/sd-id128.7
+man/SD_ID128_MAKE.7: man/sd-id128.7
+man/SD_ID128_FORMAT_STR.7: man/sd-id128.7
+man/SD_ID128_FORMAT_VAL.7: man/sd-id128.7
+man/sd_id128_equal.7: man/sd-id128.7
+man/sd_id128_from_string.3: man/sd_id128_to_string.3
+man/sd_id128_get_machine.3: man/sd_id128_randomize.3
+man/sd_id128_get_boot.3: man/sd_id128_randomize.3
XML_FILES = \
${patsubst %.1,%.xml,${patsubst %.3,%.xml,${patsubst %.5,%.xml,${patsubst %.7,%.xml,${patsubst %.8,%.xml,$(MANPAGES)}}}}}
Features:
+* journalctl highlight reboots
+
+* Merge KillUnit()'s mode and who params into one
+
* load-fragment: when loading a unit file via a chain of symlinks
verify that it isn't masked via any of the names traversed.
<citerefentry><refentrytitle>gethostid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
<citerefentry><refentrytitle>hostname</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
<citerefentry><refentrytitle>machine-info</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
- <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ <citerefentry><refentrytitle>os-release</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_id128_get_machine</refentrytitle><manvolnum>3</manvolnum></citerefentry>
</para>
</refsect1>
--- /dev/null
+<?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 2012 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-id128">
+
+ <refentryinfo>
+ <title>sd-id128</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-id128</refentrytitle>
+ <manvolnum>7</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd-id128</refname>
+ <refname>sd_id128_t</refname>
+ <refname>SD_ID128_MAKE</refname>
+ <refname>SD_ID128_FORMAT_STR</refname>
+ <refname>SD_ID128_FORMAT_VAL</refname>
+ <refname>sd_id128_equal</refname>
+ <refpurpose>APIs for processing 128 bit IDs</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <systemd/sd-id128.h></funcsynopsisinfo>
+ </funcsynopsis>
+
+ <cmdsynopsis>
+ <command>pkg-config --cflags --libs libsystemd-id128</command>
+ </cmdsynopsis>
+
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><filename>sd-id128.h</filename> provides APIs to
+ process and generate 128 bit ID values. The 128 bit ID
+ values processed and generated by these APIs are a
+ generalization of OSF UUIDs as defined by <ulink
+ url="http://tools.ietf.org/html/rfc4122">RFC
+ 4122</ulink>, though use a simpler string
+ formatting. These functions impose no structure on the
+ used IDs, much unlike OSF UUIDs or Microsoft GUIDs,
+ but are fully compatible with those types of IDs.
+ </para>
+
+ <para>See
+ <citerefentry><refentrytitle>sd_id128_to_string</refentrytitle><manvolnum>3</manvolnum></citerefentry> and
+ <citerefentry><refentrytitle>sd_id128_randomize</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ for more information about the functions
+ implemented.</para>
+
+ <para>A 128 bit ID is implemented as the following
+ union type:</para>
+
+ <programlisting>typedef union sd_id128 {
+ uint8_t bytes[16];
+ uint64_t qwords[2];
+} sd_id128_t;</programlisting>
+
+ <para>This union type allows accessing the 128 bit ID
+ as 16 separate bytes or 2 64 bit words. It is generally
+ safer to access the ID components by their 8 bit array
+ to avoid endianess issues. This union is intended to
+ be passed call-by-value (as opposed to
+ call-by-reference) and may be directly manipulated by
+ clients.</para>
+
+ <para>A couple of macros are defined to denote and
+ decode 128 bit IDs:</para>
+
+ <para><function>SD_ID128_MAKE()</function> may be used
+ to write a 128 bit ID in source code. A commonly used
+ idiom is to give 128 bit IDs names using this macro:</para>
+
+ <programlisting>#define SD_MESSAGE_COREDUMP SD_ID128_MAKE(fc,2e,22,bc,6e,e6,47,b6,b9,07,29,ab,34,a2,50,b1)</programlisting>
+
+ <para><function>SD_ID128_FORMAT_STR</function> and
+ <function>SD_ID128_FORMAT_VAL()</function> may be used
+ to format a 128 bit ID in a
+ <citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ format string, as shown in the following
+ example:</para>
+
+ <programlisting>int main(int argc, char *argv[]) {
+ sd_id128_t id;
+ id = SD_ID128_MAKE(ee,89,be,71,bd,6e,43,d6,91,e6,c5,5d,eb,03,02,07);
+ printf("The ID encoded in this C file is " SD_ID128_FORMAT_STR ".\n", SD_ID128_FORMAT_VAL(id));
+ return 0;
+}</programlisting>
+
+ <para>Use <function>sd_id128_equal()</function> to compare two 128 bit IDs:</para>
+
+ <programlisting>int main(int argc, char *argv[]) {
+ sd_id128_t a, b, c;
+ a = SD_ID128_MAKE(ee,89,be,71,bd,6e,43,d6,91,e6,c5,5d,eb,03,02,07);
+ b = SD_ID128_MAKE(f2,28,88,9c,5f,09,44,15,9d,d7,04,77,58,cb,e7,3e);
+ c = a;
+ assert(sd_id128_equal(a, c));
+ assert(!sd_id128_equal(a, b));
+ return 0;
+}</programlisting>
+
+ <para>Note that new, randomized IDs may be generated
+ with
+ <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+ <literal>--new-id</literal> command.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Notes</title>
+
+ <para>These APIs are implemented as shared library,
+ which can be compiled and linked to with the
+ <literal>libsystemd-id128</literal>
+ <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ file.</para>
+
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_id128_to_string</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd_id128_randomize</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-journal</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
--- /dev/null
+<?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 2012 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_id128_randomize">
+
+ <refentryinfo>
+ <title>sd_id128_randomize</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_id128_randomize</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd_id128_randomize</refname>
+ <refname>sd_id128_get_machine</refname>
+ <refname>sd_id128_get_boot</refname>
+ <refpurpose>Generate or retrieve 128 bit IDs</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <systemd/sd-id128.h></funcsynopsisinfo>
+
+ <funcprototype>
+ <funcdef>int <function>sd_id128_randomize</function></funcdef>
+ <paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_id128_get_machine</function></funcdef>
+ <paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_id128_get_boot</function></funcdef>
+ <paramdef>sd_id128_t* <parameter>ret</parameter></paramdef>
+ </funcprototype>
+
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><function>sd_id128_randomize()</function>
+ generates a new randomized 128 bit ID and returns it
+ in <parameter>ret</parameter>. Every invocation
+ returns a new randomly generated ID. This uses the
+ <filename>/dev/urandom</filename> kernel random number
+ generator.</para>
+
+ <para><function>sd_id128_get_machine()</function>
+ returns the machine ID of the executing host. This
+ reads and parses the
+ <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ file. This function caches the machine ID internally
+ to make retrieving the machine ID a cheap
+ operation.</para>
+
+ <para><function>sd_id128_get_boot()</function> returns
+ the boot ID of the executing kernel. This reads and
+ parses the
+ <filename>/proc/sys/kernel/random/boot_id</filename>
+ file exposed by the kernel. It is randomly generated
+ early at boot and is unique for every running kernel
+ instance. See
+ <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
+ for more information. This function also internally
+ caches the returned ID to make this call a cheap
+ operation.</para>
+
+ <para>Note that
+ <function>sd_id128_randomize()</function> and
+ <function>sd_id128_get_boot()</function> always return
+ a UUID v4 compatible
+ ID. <function>sd_id128_get_machine()</function> will
+ also return a UUID v4 compatible ID on new
+ installations, but might not on older. It is possible
+ to convert the machine ID into an UUID v4 compatible
+ one. For more information see
+ <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>.</para>
+
+ <para>For more information about the
+ <literal>sd_id128_t</literal> type see
+ <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
+
+ <para><citerefentry><refentrytitle>journalctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>'s
+ <literal>--new-id</literal> command may be used as
+ command line front-end for
+ <function>sd_id128_randomize()</function>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para>The three calls returns 0 on success (in which
+ case <parameter>ret</parameter> is filled in), or a
+ negative errno-style error code.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Notes</title>
+
+ <para>The <function>sd_id128_randomize()</function>,
+ <function>sd_id128_get_machine()</function> and
+ <function>sd_id128_get_boot()</function> interfaces
+ are available as shared library, which can be compiled
+ and linked to with the
+ <literal>libsystemd-id128</literal>
+ <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ file.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>machine-id</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>random</refentrytitle><manvolnum>4</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
--- /dev/null
+<?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 2012 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_id128_to_string">
+
+ <refentryinfo>
+ <title>sd_id128_to_string</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_id128_to_string</refentrytitle>
+ <manvolnum>3</manvolnum>
+ </refmeta>
+
+ <refnamediv>
+ <refname>sd_id128_to_string</refname>
+ <refname>sd_id128_from_string</refname>
+ <refpurpose>Format or parse 128 bit IDs as strings</refpurpose>
+ </refnamediv>
+
+ <refsynopsisdiv>
+ <funcsynopsis>
+ <funcsynopsisinfo>#include <systemd/sd-id128.h></funcsynopsisinfo>
+
+ <funcprototype>
+ <funcdef>char* <function>sd_id128_to_string</function></funcdef>
+ <paramdef>sd_id128_t <parameter>id</parameter>, char <parameter>s</parameter>[33]</paramdef>
+ </funcprototype>
+
+ <funcprototype>
+ <funcdef>int <function>sd_id128_from_string</function></funcdef>
+ <paramdef>const char <parameter>s</parameter>[33], sd_id128_t* <parameter>ret</parameter></paramdef>
+ </funcprototype>
+
+ </funcsynopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para><function>sd_id128_to_string()</function>
+ formats a 128 bit ID as character string. It expects
+ the ID and a string array capable of storing 33
+ characters. The ID will be formatted as 32 lowercase
+ hexadecimal digits and be terminated by a NUL
+ byte.</para>
+
+ <para><function>sd_id128_from_string()</function>
+ implements the reverse operation: it takes a 33
+ character array with 32 hexadecimial digits
+ (terminated by NUL) and parses them back into an
+ 128 bit ID returned in
+ <parameter>ret</parameter>.</para>
+
+ <para>For more information about the
+ <literal>sd_id128_t</literal> type see
+ <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
+
+ <para>When formatting a 128 bit ID into a string it is
+ often easier to use a format string for
+ <citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>. This
+ is easly done using the
+ <function>SD_ID128_FORMAT_STR</function> and
+ <function>SD_ID128_FORMAT_VAL()</function> macros. For
+ more information see
+ <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>7</manvolnum></citerefentry>.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Return Value</title>
+
+ <para><function>sd_id128_to_string()</function> always
+ succeeds and returns a pointer to the string array
+ passed in. <function>sd_id128_from_string</function>
+ returns 0 on success (in which case
+ <parameter>ret</parameter> is filled in), or a negative
+ errno-style error code.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Notes</title>
+
+ <para>The <function>sd_id128_to_string()</function>
+ and <function>sd_id128_from_string()</function> interfaces are
+ available as shared library, which can be compiled and
+ linked to with the <literal>libsystemd-id128</literal>
+ <citerefentry><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+ file.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>See Also</title>
+
+ <para>
+ <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>sd-id128</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
+ <citerefentry><refentrytitle>printf</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+ </para>
+ </refsect1>
+
+</refentry>
~ianmdlvl / elogind.git / commitdiff