diff options
Diffstat (limited to 'man')
| -rw-r--r-- | man/sd_bus_add_match.xml | 119 | ||||
| -rw-r--r-- | man/sd_bus_get_fd.xml | 101 | ||||
| -rw-r--r-- | man/sd_bus_message_read_basic.xml | 113 | ||||
| -rw-r--r-- | man/sd_bus_process.xml | 111 |
4 files changed, 444 insertions, 0 deletions
diff --git a/man/sd_bus_add_match.xml b/man/sd_bus_add_match.xml new file mode 100644 index 0000000000..8bcf7164a0 --- /dev/null +++ b/man/sd_bus_add_match.xml @@ -0,0 +1,119 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!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 Julian Orth + + 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_bus_add_match"> + + <refentryinfo> + <title>sd_bus_add_match</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <firstname>Julian</firstname> + <surname>Orth</surname> + <email>ju.orth@gmail.com</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_add_match</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_add_match</refname> + + <refpurpose>Add a match rule for message dispatching</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_add_match</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + <paramdef>sd_bus_slot **<parameter>slot</parameter></paramdef> + <paramdef>const char *<parameter>match</parameter></paramdef> + <paramdef>sd_bus_message_handler_t <parameter>callback</parameter></paramdef> + <paramdef>void *<parameter>userdata</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>typedef int (*<function>sd_bus_message_handler_t</function>)</funcdef> + <paramdef>sd_bus_message *<parameter>m</parameter></paramdef> + <paramdef>void *<parameter>userdata</parameter></paramdef> + <paramdef>sd_bus_error *<parameter>ret_error</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para> + <function>sd_bus_add_match()</function> adds a match rule used to dispatch + incoming messages. The syntax of the rule passed in + <parameter>match</parameter> is described in the + <ulink url="https://dbus.freedesktop.org/doc/dbus-specification.html">D-Bus Specification</ulink>. + </para> + + <para> + The message <parameter>m</parameter> passed to the callback is only + borrowed, that is, the callback should not call + <citerefentry><refentrytitle>sd_bus_message_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry> + on it. If the callback wants to hold on to the message beyond the lifetime + of the callback, it needs to call + <citerefentry><refentrytitle>sd_bus_message_ref</refentrytitle><manvolnum>3</manvolnum></citerefentry> + to create a new reference. + </para> + + <para> + If an error occurs during the callback invocation, the callback should + return a negative error number. If it wants other callbacks that match the + same rule to be called, it should return 0. Otherwise it should return a + positive integer. + </para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para> + On success, <function>sd_bus_add_match()</function> returns 0 or a + positive integer. On failure, it returns a negative errno-style error + code. + </para> + </refsect1> + + <refsect1> + <title>See Also</title> + + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + </para> + </refsect1> + +</refentry> diff --git a/man/sd_bus_get_fd.xml b/man/sd_bus_get_fd.xml new file mode 100644 index 0000000000..49162a6e65 --- /dev/null +++ b/man/sd_bus_get_fd.xml @@ -0,0 +1,101 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!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 Julian Orth + + 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_bus_get_fd"> + + <refentryinfo> + <title>sd_bus_get_fd</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <firstname>Julian</firstname> + <surname>Orth</surname> + <email>ju.orth@gmail.com</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_get_fd</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_get_fd</refname> + + <refpurpose>Get the file descriptor connected to the message bus</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_get_fd</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para> + <function>sd_bus_get_fd()</function> returns the file descriptor used to + communicate with the message bus. This descriptor can be used with + <citerefentry + project='die-net'><refentrytitle>select</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry + project='die-net'><refentrytitle>poll</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + or similar functions to wait for incmming messages. + </para> + + <para> + If the bus was created with the + <citerefentry><refentrytitle>sd_bus_set_fd</refentrytitle><manvolnum>3</manvolnum></citerefentry> + function, then the <parameter>input_fd</parameter> used in that call is + returned. + </para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para> + Returns the file descriptor used for incoming messages from the message + bus. + </para> + </refsect1> + + <refsect1> + <title>See Also</title> + + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_bus_set_fd</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + </para> + </refsect1> + +</refentry> diff --git a/man/sd_bus_message_read_basic.xml b/man/sd_bus_message_read_basic.xml new file mode 100644 index 0000000000..6a46403159 --- /dev/null +++ b/man/sd_bus_message_read_basic.xml @@ -0,0 +1,113 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!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 Julian Orth + + 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_bus_message_read_basic"> + + <refentryinfo> + <title>sd_bus_message_read_basic</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <firstname>Julian</firstname> + <surname>Orth</surname> + <email>ju.orth@gmail.com</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_message_read_basic</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_message_read_basic</refname> + + <refpurpose>Read a basic type from a message</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_message_read_basic</function></funcdef> + <paramdef>sd_bus_message *<parameter>m</parameter></paramdef> + <paramdef>char <parameter>type</parameter></paramdef> + <paramdef>void *<parameter>p</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para> + <function>sd_bus_message_read_basic()</function> reads a basic type from a + message and advances the read position in the message. The set of basic + types and their ascii codes passed in <parameter>type</parameter> are + described in the <ulink + url="https://dbus.freedesktop.org/doc/dbus-specification.html">D-Bus + Specification</ulink>. + </para> + + <para> + If <parameter>p</parameter> is not NULL, it should contain a pointer to an + appropriate object. For example, if <parameter>type</parameter> is + <constant>'y'</constant>, the object passed in <parameter>p</parameter> + should have type <code>uint8_t *</code>. If <parameter>type</parameter> + is <constant>'s'</constant>, the object passed in <parameter>p</parameter> + should have type <code>const char **</code>. Note that, if the basic type + is a pointer (e.g., <code>const char *</code> in the case of a string), + the pointer is only borrowed and the contents must be copied if they are + to be used after the end of the messages lifetime. Similarly, during the + lifetime of such a pointer, the message must not be modified. + </para> + + <para> + If there is no object of the specified type at the current position in the + message, an error is returned. + </para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para> + On success, <function>sd_bus_message_read_basic()</function> returns 0 or + a positive integer. On failure, it returns a negative errno-style error + code. + </para> + </refsect1> + + <refsect1> + <title>See Also</title> + + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + </para> + </refsect1> + +</refentry> diff --git a/man/sd_bus_process.xml b/man/sd_bus_process.xml new file mode 100644 index 0000000000..4b9f52e52f --- /dev/null +++ b/man/sd_bus_process.xml @@ -0,0 +1,111 @@ +<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*--> +<!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 Julian Orth + + 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_bus_process"> + + <refentryinfo> + <title>sd_bus_process</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <firstname>Julian</firstname> + <surname>Orth</surname> + <email>ju.orth@gmail.com</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_bus_process</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_bus_process</refname> + + <refpurpose>Drive the connection</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_bus_process</function></funcdef> + <paramdef>sd_bus *<parameter>bus</parameter></paramdef> + <paramdef>sd_bus_message **<parameter>r</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para> + <function>sd_bus_process()</function> drives the connection between the + message bus and the client. That is, it handles connecting, + authentication, and message processing. It should be called in a loop + until no further progress can be made or an error occurs. + </para> + + <para> + Once no further progress can be made, + <citerefentry><refentrytitle>sd_bus_wait</refentrytitle><manvolnum>3</manvolnum></citerefentry> + should be called. Alternatively the user can wait for incoming data on + the file descriptor returned by + <citerefentry><refentrytitle>sd_bus_get_fd</refentrytitle><manvolnum>3</manvolnum></citerefentry>. + </para> + + <para> + <function>sd_bus_process</function> processes at most one incoming + message per call. If the parameter <parameter>r</parameter> is not NULL + and the call processed a message, <code>*r</code> is set to this message. + The caller owns a reference to this message and should call + <citerefentry><refentrytitle>sd_bus_message_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry> + when the message is no longer needed. If <parameter>r</parameter> is not + NULL, progress was made, but no message was processed, <code>*r</code> is + set to NULL. + </para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para> + If progress was made, a positive integer is returned. If no progress was + made, 0 is returned. If an error occurs, a negative errno-style error code + is returned. + </para> + </refsect1> + + <refsect1> + <title>See Also</title> + + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + </para> + </refsect1> + +</refentry> |