mirror of
https://github.com/systemd/systemd.git
synced 2024-11-27 20:23:36 +08:00
236 lines
9.6 KiB
XML
236 lines
9.6 KiB
XML
<?xml version='1.0'?>
|
|
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
|
|
"http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
|
|
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
|
|
|
|
<refentry id="sd_path_lookup" xmlns:xi="http://www.w3.org/2001/XInclude">
|
|
|
|
<refentryinfo>
|
|
<title>sd_path_lookup</title>
|
|
<productname>systemd</productname>
|
|
</refentryinfo>
|
|
|
|
<refmeta>
|
|
<refentrytitle>sd_path_lookup</refentrytitle>
|
|
<manvolnum>3</manvolnum>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>sd_path_lookup</refname>
|
|
<refname>sd_path_lookup_strv</refname>
|
|
|
|
<refpurpose>Query well-known file system paths</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<funcsynopsis>
|
|
<funcsynopsisinfo>#include <systemd/sd-path.h></funcsynopsisinfo>
|
|
|
|
<!-- note: individual constants are not added as <refname>s, there's just too many -->
|
|
|
|
<funcsynopsisinfo><token>enum</token> {
|
|
<constant>SD_PATH_TEMPORARY</constant>,
|
|
<constant>SD_PATH_TEMPORARY_LARGE</constant>,
|
|
|
|
<constant>SD_PATH_SYSTEM_BINARIES</constant>,
|
|
<constant>SD_PATH_SYSTEM_INCLUDE</constant>,
|
|
<constant>SD_PATH_SYSTEM_LIBRARY_PRIVATE</constant>,
|
|
<constant>SD_PATH_SYSTEM_LIBRARY_ARCH</constant>,
|
|
<constant>SD_PATH_SYSTEM_SHARED</constant>,
|
|
<constant>SD_PATH_SYSTEM_CONFIGURATION_FACTORY</constant>,
|
|
<constant>SD_PATH_SYSTEM_STATE_FACTORY</constant>,
|
|
|
|
<constant>SD_PATH_SYSTEM_CONFIGURATION</constant>,
|
|
<constant>SD_PATH_SYSTEM_RUNTIME</constant>,
|
|
<constant>SD_PATH_SYSTEM_RUNTIME_LOGS</constant>,
|
|
<constant>SD_PATH_SYSTEM_STATE_PRIVATE</constant>,
|
|
<constant>SD_PATH_SYSTEM_STATE_LOGS</constant>,
|
|
<constant>SD_PATH_SYSTEM_STATE_CACHE</constant>,
|
|
<constant>SD_PATH_SYSTEM_STATE_SPOOL</constant>,
|
|
|
|
<constant>SD_PATH_USER_BINARIES</constant>,
|
|
<constant>SD_PATH_USER_LIBRARY_PRIVATE</constant>,
|
|
<constant>SD_PATH_USER_LIBRARY_ARCH</constant>,
|
|
<constant>SD_PATH_USER_SHARED</constant>,
|
|
|
|
<constant>SD_PATH_USER_CONFIGURATION</constant>,
|
|
<constant>SD_PATH_USER_RUNTIME</constant>,
|
|
<constant>SD_PATH_USER_STATE_PRIVATE</constant>,
|
|
<constant>SD_PATH_USER_STATE_CACHE</constant>,
|
|
|
|
<constant>SD_PATH_USER</constant>,
|
|
<constant>SD_PATH_USER_DOCUMENTS</constant>,
|
|
<constant>SD_PATH_USER_MUSIC</constant>,
|
|
<constant>SD_PATH_USER_PICTURES</constant>,
|
|
<constant>SD_PATH_USER_VIDEOS</constant>,
|
|
<constant>SD_PATH_USER_DOWNLOAD</constant>,
|
|
<constant>SD_PATH_USER_PUBLIC</constant>,
|
|
<constant>SD_PATH_USER_TEMPLATES</constant>,
|
|
<constant>SD_PATH_USER_DESKTOP</constant>,
|
|
|
|
<constant>SD_PATH_SEARCH_BINARIES</constant>,
|
|
<constant>SD_PATH_SEARCH_BINARIES_DEFAULT</constant>,
|
|
<constant>SD_PATH_SEARCH_LIBRARY_PRIVATE</constant>,
|
|
<constant>SD_PATH_SEARCH_LIBRARY_ARCH</constant>,
|
|
<constant>SD_PATH_SEARCH_SHARED</constant>,
|
|
<constant>SD_PATH_SEARCH_CONFIGURATION_FACTORY</constant>,
|
|
<constant>SD_PATH_SEARCH_STATE_FACTORY</constant>,
|
|
<constant>SD_PATH_SEARCH_CONFIGURATION</constant>,
|
|
|
|
<constant>SD_PATH_SYSTEMD_UTIL</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SYSTEM_UNIT</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SYSTEM_PRESET</constant>,
|
|
<constant>SD_PATH_SYSTEMD_USER_UNIT</constant>,
|
|
<constant>SD_PATH_SYSTEMD_USER_PRESET</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SYSTEM_CONF</constant>,
|
|
<constant>SD_PATH_SYSTEMD_USER_CONF</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_SYSTEM_UNIT</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_USER_UNIT</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SYSTEM_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_USER_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_SYSTEM_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_USER_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SLEEP</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SHUTDOWN</constant>,
|
|
|
|
<constant>SD_PATH_TMPFILES</constant>,
|
|
<constant>SD_PATH_SYSUSERS</constant>,
|
|
<constant>SD_PATH_SYSCTL</constant>,
|
|
<constant>SD_PATH_BINFMT</constant>,
|
|
<constant>SD_PATH_MODULES_LOAD</constant>,
|
|
<constant>SD_PATH_CATALOG</constant>,
|
|
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_NETWORK</constant>,
|
|
|
|
<constant>SD_PATH_SYSTEMD_SYSTEM_ENVIRONMENT_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_USER_ENVIRONMENT_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_SYSTEM_ENVIRONMENT_GENERATOR</constant>,
|
|
<constant>SD_PATH_SYSTEMD_SEARCH_USER_ENVIRONMENT_GENERATOR</constant>,
|
|
};</funcsynopsisinfo>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_path_lookup</function></funcdef>
|
|
<paramdef>uint64_t <parameter>type</parameter></paramdef>
|
|
<paramdef>const char *<parameter>suffix</parameter></paramdef>
|
|
<paramdef>char **<parameter>paths</parameter></paramdef>
|
|
</funcprototype>
|
|
|
|
<funcprototype>
|
|
<funcdef>int <function>sd_path_lookup_strv</function></funcdef>
|
|
<paramdef>uint64_t <parameter>type</parameter></paramdef>
|
|
<paramdef>const char *<parameter>suffix</parameter></paramdef>
|
|
<paramdef>char ***<parameter>paths</parameter></paramdef>
|
|
</funcprototype>
|
|
</funcsynopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para><function>sd_path_lookup()</function> and <function>sd_bus_path_lookup_strv()</function> return a
|
|
single path or set of file system paths specified by the argument <parameter>type</parameter>. In case of
|
|
<function>sd_path_lookup()</function> a single <constant>NUL</constant>-terminated string is returned.
|
|
When <parameter>type</parameter> specifies a set of paths, they are concatenated using
|
|
<literal>:</literal> as a separator (as is traditionally done for e.g. <varname>$PATH</varname> or
|
|
<varname>$LD_LIBRARY_PATH</varname>). In case of <function>sd_path_lookup_strv()</function> a
|
|
<constant>NULL</constant>-terminated array of strings is returned (strv). If suffix
|
|
<parameter>suffix</parameter> is given, it is concatenated to each of the paths after a slash
|
|
(<literal>/</literal>). All returned paths are absolute.</para>
|
|
|
|
<para>For paths which refer to user directories, the relevant XDG standard is followed, with support for
|
|
environment variables like <varname>$XDG_DOCUMENTS_DIR</varname>, <varname>$XDG_DESKTOP_DIR</varname>,
|
|
..., and explicit configuration in <filename>/etc/xdg/user-dirs.conf</filename> or
|
|
<filename>${XDG_CONFIG_HOME}/user-dirs.dirs</filename>. See
|
|
<ulink url="https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html">
|
|
XDG Base Directory Specification</ulink> for details.</para>
|
|
|
|
<para><citerefentry><refentrytitle>systemd-path</refentrytitle><manvolnum>1</manvolnum></citerefentry> is
|
|
a wrapper around <function>sd_path_lookup()</function> and allows the same set of paths to be queried.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Return Value</title>
|
|
|
|
<para>On success, <function>sd_path_lookup()</function> and <function>sd_path_lookup_strv()</function>
|
|
return a non-negative integer. On failure, a negative errno-style error number is returned by either
|
|
function.</para>
|
|
|
|
<para>The returned string or string array (strv) must be
|
|
<citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>'d by the
|
|
caller.</para>
|
|
|
|
<refsect2 id='errors'>
|
|
<title>Errors</title>
|
|
|
|
<para>Returned errors may indicate the following problems:</para>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><constant>-EOPNOTSUPP</constant></term>
|
|
|
|
<listitem><para>Unknown identifier <parameter>type</parameter>.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v246"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><constant>-EINVAL</constant></term>
|
|
|
|
<listitem><para>Output argument is <constant>NULL</constant>.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v246"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><constant>-ENXIO</constant></term>
|
|
|
|
<listitem><para>Query failed because of an undefined environment variable (e.g. for
|
|
<constant>SD_PATH_USER_RUNTIME</constant> when <varname>$XDG_RUNTIME_DIR</varname> is not
|
|
defined).</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v246"/></listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><constant>-ENOMEM</constant></term>
|
|
|
|
<listitem><para>Memory allocation failed.</para>
|
|
|
|
<xi:include href="version-info.xml" xpointer="v246"/></listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect2>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Examples</title>
|
|
|
|
<refsect2>
|
|
<title>Look up the location of ~/Documents</title>
|
|
|
|
<programlisting><xi:include href="path-documents.c" parse="text" /></programlisting>
|
|
<para>Note that the default answer of <filename index='false'>$HOME/Documents</filename> may be
|
|
overridden by <filename index='false'>user-dirs.conf</filename> or
|
|
<varname>$XDG_DOCUMENTS_DIR</varname>.</para>
|
|
</refsect2>
|
|
</refsect1>
|
|
|
|
<xi:include href="libsystemd-pkgconfig.xml" />
|
|
|
|
<refsect1>
|
|
<title>History</title>
|
|
<para><function>sd_path_lookup()</function> and
|
|
<function>sd_path_lookup_strv()</function> were added in version 246.</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<para>
|
|
<citerefentry><refentrytitle>systemd-path</refentrytitle><manvolnum>1</manvolnum></citerefentry>
|
|
</para>
|
|
</refsect1>
|
|
|
|
</refentry>
|