diff options
author | Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> | 2020-04-20 08:44:26 +0200 |
---|---|---|
committer | GitHub <noreply@github.com> | 2020-04-20 08:44:26 +0200 |
commit | f294b60204e985eef87a4492f128391b9c0eaa9c (patch) | |
tree | 4bf2c694bab33f29d394ab03c4f0e5309a2e145e | |
parent | 9268c04bc108b9d33ffe3e0253163cc3e513e27d (diff) | |
parent | 7f3daf158ab18a846cb5401c34db37b2956791b9 (diff) | |
download | systemd-f294b60204e985eef87a4492f128391b9c0eaa9c.tar.gz |
Merge pull request #15480 from DaanDeMeyer/sd-bus-add-node-enumerator-docs
sd-bus: Add sd_bus_add_node_enumerator docs
-rw-r--r-- | man/rules/meson.build | 1 | ||||
-rw-r--r-- | man/sd-bus.xml | 1 | ||||
-rw-r--r-- | man/sd_bus_add_node_enumerator.xml | 137 | ||||
-rw-r--r-- | man/sd_bus_add_object.xml | 4 | ||||
-rw-r--r-- | man/sd_bus_add_object_manager.xml | 2 |
5 files changed, 142 insertions, 3 deletions
diff --git a/man/rules/meson.build b/man/rules/meson.build index 601a0a0ff8..772ac1dc24 100644 --- a/man/rules/meson.build +++ b/man/rules/meson.build @@ -129,6 +129,7 @@ manpages = [ 'sd_bus_match_signal', 'sd_bus_match_signal_async'], ''], + ['sd_bus_add_node_enumerator', '3', [], ''], ['sd_bus_add_object', '3', ['SD_BUS_METHOD', diff --git a/man/sd-bus.xml b/man/sd-bus.xml index 55772dd856..f47e78cd68 100644 --- a/man/sd-bus.xml +++ b/man/sd-bus.xml @@ -47,6 +47,7 @@ <citerefentry><refentrytitle>sd_bus_add_fallback</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd_bus_add_fallback_vtable</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd_bus_add_filter</refentrytitle><manvolnum>3</manvolnum></citerefentry>, +<citerefentry><refentrytitle>sd_bus_add_node_enumerator</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd_bus_attach_event</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd_bus_call</refentrytitle><manvolnum>3</manvolnum></citerefentry>, <citerefentry><refentrytitle>sd_bus_call_async</refentrytitle><manvolnum>3</manvolnum></citerefentry>, diff --git a/man/sd_bus_add_node_enumerator.xml b/man/sd_bus_add_node_enumerator.xml new file mode 100644 index 0000000000..fd11e46fcb --- /dev/null +++ b/man/sd_bus_add_node_enumerator.xml @@ -0,0 +1,137 @@ +<?xml version='1.0'?> <!--*-nxml-*--> +<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> +<!-- SPDX-License-Identifier: LGPL-2.1+ --> + +<refentry id="sd_bus_add_node_enumerator" + xmlns:xi="http://www.w3.org/2001/XInclude"> + + <refentryinfo> + <title>sd_bus_add_node_enumerator</title> + <productname>systemd</productname> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_add_node_enumerator</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_add_node_enumerator</refname> + + <refpurpose>Add a node enumerator for a D-Bus object path prefix</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>typedef int (*<function>sd_bus_node_enumerator_t</function>)</funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + <paramdef>const char *<parameter>prefix</parameter></paramdef> + <paramdef>void *<parameter>userdata</parameter></paramdef> + <paramdef>char ***<parameter>ret_nodes</parameter></paramdef> + <paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_bus_add_node_enumerator</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + <paramdef>sd_bus_slot **<parameter>slot</parameter></paramdef> + <paramdef>const char *<parameter>path</parameter></paramdef> + <paramdef>sd_bus_node_enumerator_t <parameter>callback</parameter></paramdef> + <paramdef>void *<parameter>userdata</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><function>sd_bus_add_node_enumerator()</function> adds a D-Bus node enumerator for the + given path prefix. The given callback is called to enumerate all the available objects with + the given path prefix when required (e.g. when + <constant>org.freedesktop.DBus.Introspectable.Introspect</constant> or + <constant>org.freedesktop.DBus.ObjectManager.GetManagedObjects</constant> are called on a + D-Bus service managed by sd-bus).</para> + + <para><parameter>callback</parameter> is called with the path and userdata pointer registered + with <function>sd_bus_add_node_enumerator()</function>. When called, it should store all the + child object paths of the given path prefix in <parameter>ret_nodes</parameter> and return the + number of child objects under the given prefix. If an error occurs, it can either return a + negative integer, set <parameter>ret_error</parameter> to a non-empty error or do both. Any + errors returned by the callback are encoded as D-Bus errors and sent back to the caller. Errors + in <parameter>ret_error</parameter> take priority over negative return values.</para> + + <para>Note that a node enumerator callback will only ever be called for a single path prefix + and hence, for normal operation, <parameter>prefix</parameter> can be ignored. Also, a node + enumerator is only used to enumerate the available child objects under a given prefix. To + install a handler for a set of dynamic child objects, use + <citerefentry><refentrytitle>sd_bus_add_fallback_vtable</refentrytitle><manvolnum>3</manvolnum></citerefentry>. + </para> + + <para>When <function>sd_bus_add_node_enumerator()</function> succeeds, a slot is created + internally. If the output parameter <replaceable>slot</replaceable> is <constant>NULL</constant>, + a "floating" slot object is created, see + <citerefentry><refentrytitle>sd_bus_slot_set_floating</refentrytitle><manvolnum>3</manvolnum></citerefentry>. + Otherwise, a pointer to the slot object is returned. In that case, the reference to the slot + object should be dropped when the node enumerator is not needed anymore, see + <citerefentry><refentrytitle>sd_bus_slot_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>. + </para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para>On success, <function>sd_bus_add_node_enumerator()</function> returns a non-negative + integer. On failure, it returns a negative errno-style error code.</para> + + <refsect2> + <title>Errors</title> + + <para>Returned errors may indicate the following problems:</para> + + <variablelist> + <varlistentry> + <term><constant>-EINVAL</constant></term> + + <listitem><para>One of the required parameters is <constant>NULL</constant> or + <parameter>path</parameter> is not a valid object path. + </para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-ENOPKG</constant></term> + + <listitem><para>The bus cannot be resolved.</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-ECHILD</constant></term> + + <listitem><para>The bus was created in a different process.</para></listitem> + </varlistentry> + + <varlistentry> + <term><constant>-ENOMEM</constant></term> + + <listitem><para>Memory allocation failed.</para></listitem> + </varlistentry> + </variablelist> + </refsect2> + </refsect1> + + <xi:include href="libsystemd-pkgconfig.xml" /> + + <refsect1> + <title>See Also</title> + + <para> + <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>busctl</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_bus_add_fallback_vtable</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_bus_slot_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> +</refentry> diff --git a/man/sd_bus_add_object.xml b/man/sd_bus_add_object.xml index c1e4b5f686..a747df62ca 100644 --- a/man/sd_bus_add_object.xml +++ b/man/sd_bus_add_object.xml @@ -488,8 +488,8 @@ <refsect1> <title>Return Value</title> - <para>On success, <function>sd_bus_add_object_vtable</function> and - <function>sd_bus_add_fallback_vtable</function> calls return 0 or a positive integer. On + <para>On success, <function>sd_bus_add_object_vtable()</function> and + <function>sd_bus_add_fallback_vtable()</function> return a non-negative integer. On failure, they return a negative errno-style error code.</para> <refsect2> diff --git a/man/sd_bus_add_object_manager.xml b/man/sd_bus_add_object_manager.xml index 32569788b6..cc442d161c 100644 --- a/man/sd_bus_add_object_manager.xml +++ b/man/sd_bus_add_object_manager.xml @@ -51,7 +51,7 @@ <citerefentry><refentrytitle>sd_bus_emit_interfaces_removed</refentrytitle><manvolnum>3</manvolnum></citerefentry> whenever interfaces are added or removed from the sub-tree, respectively.</para> - <para>When <function>sd_bus_add_object_manager</function> succeeds, a slot is created + <para>When <function>sd_bus_add_object_manager()</function> succeeds, a slot is created internally. If the output parameter <replaceable>slot</replaceable> is <constant>NULL</constant>, a "floating" slot object is created, see <citerefentry><refentrytitle>sd_bus_slot_set_floating</refentrytitle><manvolnum>3</manvolnum></citerefentry>. |