dbus

SImple (but specific) listener and sender Python 3 DBus example

由 元气小坏坏 提交于 2020-01-01 00:44:10
问题 I want to make a program that has two parts. A listener (a server, if you will) and a sender (the client). I did some research and learned that this is done via a method programmers call IPC (inter process communication); I'm sure you know what it means, I am just expanding the acronym so that you know that I don't think it means Internet Pet Cannibals (or some other non related unpleasant thing). I read that a good way to achieve this is to use dbus. So I did some research on dbus, and now I

How to export DBUS_SESSION_BUS_ADDRESS

由 ↘锁芯ラ 提交于 2019-12-31 16:48:46
问题 I'm trying to run D-Bus on an embedded system (Yocto Linux) and connect to it from my application code. I get the following error when I call dbus_bus_get(DBUS_BUS_SESSION, &err); Using X11 for dbus-daemon autolaunch was disabled at compile time, set your DBUS_SESSION_BUS_ADDRESS instead I realize that I need to start the dbus-daemon first so I have run dbus-launch from the command line. This prints out a value of DBUS_SESSION_BUS_ADDRESS but how could I export it programmatically? Thanks for

D-Bus equivalent for Windows

由 我的梦境 提交于 2019-12-31 08:52:15
问题 Anyone know of a Linux/D-Bus sort of mechanism for Windows? Thanks 回答1: Choose your poison: http://msdn.microsoft.com/en-us/library/aa365574%28VS.85%29.aspx The following IPC mechanisms are supported by Windows: Clipboard COM Data Copy DDE File Mapping Mailslots Pipes RPC Windows Sockets The closest to DBus is COM. 回答2: The reference D-Bus implementation natively supports Windows. Previously, the WinDBus project could be used. There is no need for equivalents if you want to use D-Bus. 回答3:

D-Bus equivalent for Windows

由 女生的网名这么多〃 提交于 2019-12-31 08:52:14
问题 Anyone know of a Linux/D-Bus sort of mechanism for Windows? Thanks 回答1: Choose your poison: http://msdn.microsoft.com/en-us/library/aa365574%28VS.85%29.aspx The following IPC mechanisms are supported by Windows: Clipboard COM Data Copy DDE File Mapping Mailslots Pipes RPC Windows Sockets The closest to DBus is COM. 回答2: The reference D-Bus implementation natively supports Windows. Previously, the WinDBus project could be used. There is no need for equivalents if you want to use D-Bus. 回答3:

what dbus performance issue could prevent it from embedded system?

由 ＊爱你＆永不变心＊ 提交于 2019-12-30 06:12:31
问题 From my reading dbus performance should be twice slower than other messaging ipc mechanisms due to existence of a daemon. In the discussion of the so question which Linux IPC technique to use someones mention performance issues. Do you see performance issues other than the twice slower factor? Do you see the issue that prevent dbus from being used in embedded system? To my understanding if dbus is intended for small messages. If large amount of data need to be passed around, one of the

How does one expose methods and properties on DBus using a QDBusAbstractAdaptor with PyQt4?

由 流过昼夜 提交于 2019-12-30 05:26:08
问题 I am trying to get some basic code running on DBus using PyQt4, specifically QtDBus. I am using a Python3 version of PyQt4. I have already gotten the code I want running on Qt (c++) but I want to get similar code running using only Python. I want to expose Methods, signals/slots and properties on DBus for other Python code to call. In Qt you use the Q_CLASSINFO macro/function to do DBus introspection. While I have pulled in the Q_CLASSINFO method, i can't get it to produce the same type of

gdbus-monitor - interface `<none>`

由 瘦欲@ 提交于 2019-12-25 07:08:02
问题 Has the interface <none> in the gdbus-monitor output a special meaning? What API call is required to create such a message using GDbus ( g_dbus_connection_register_object does not allow to pass NULL as GDBusInterfaceInfo * and that seems to be the only to register a object to a path) related: dbus - register object to remote on interface NULL 回答1: Looking into dbus-monitor 's source code shows that it occures as soon as DBUS_EXPORT const char * dbus_message_get_interface ( DBusMessage *

dbus - register object to remote on interface NULL

由 可紊 提交于 2019-12-25 04:09:06
问题 I have to deal with a binary blob dbus service/server which I need to connect to via dbus (session). The introspection of the interface is as following (obtained via gdbus-codegen ). We register a function to the remote so we get notified if a message has been received by the remote which is called message_handler . That happens as a response on a send_message command which I pass via dbus, but that works (and is thus not shown). In a java example it is done via dbus_connection.exportObject("

lsof-显示系统打开的文件

由 荒凉一梦 提交于 2019-12-24 17:01:50
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> [root@CentOS7 ~]# lsof -h lsof 4.87 latest revision: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/ latest FAQ: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/FAQ latest man page: ftp://lsof.itap.purdue.edu/pub/tools/unix/lsof/lsof_man usage: [-?abhKlnNoOPRtUvVX] [+|-c c] [+|-d s] [+D D] [+|-f[gG]] [+|-e s] [-F [f]] [-g [s]] [-i [i]] [+|-L [l]] [+m [m]] [+|-M] [-o [o]] [-p s] [+|-r [t]] [-s [p:s]] [-S [t]] [-T [t]] [-u s] [+|-w] [-x [fl]] [--] [names] Defaults in parentheses; comma-separated set (s) items; dash-separated ranges. -?|-h list help # 帮助 -a AND

Linux BlueZ dbus communication a2dp

由 你。 提交于 2019-12-24 16:19:24
问题 As a quick summary I'm currently building a Raspberry Pi with the ability to act as a Bluetooth A2DP Receiver and routing that audio to a 3.5mm connection. One of the Python scripts I run uses BlueZ and Dbus to communicate with the bluetooth device, At the moment the script I'm using finds a BT device thats been paired with the system before and auto connects to it (Script runs on cron), I can then press Play on my iPhone to start the audio streaming.. However what I am trying to do is once
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