dbus

How to use the existing services in DBus?

由 青春壹個敷衍的年華 提交于 2020-01-11 13:29:27
问题 I am able to use the dbus commands like dbus-send and etc. But i am not getting how to use the api's of dbus efficiently to write sample applications. Can any one please tell me how to receive the data from the dbus. I am not getting how to use the existing services in dbus like org.freedesktop.NetworkManager Please tell me the proper way to access and use the services of dbus. Please post some sample examples and also suggest me what are the rules we have to follow while using a service. i

How to access session D-Bus from systemd user service?

由 强颜欢笑 提交于 2020-01-07 06:45:16
问题 I have user service running shell script, which is trying to access lockscreen state of my session like this: # Test Unity screen-lock: isLocked() { isLocked=$(gdbus call -e -d com.canonical.Unity -o /com/canonical/Unity/Session -m com.canonical.Unity.Session.IsLocked) } lock() { if [[ $isLocked == "(false,)" ]]; then gnome-screensaver-command -l elif [[ $isLocked == "(true,)" ]]; then exit 1 fi exit 0 } The problem is service “is a per-user process, and not per-session”, and I don't know how

How to access session D-Bus from systemd user service?

由 混江龙づ霸主 提交于 2020-01-07 06:44:58
问题 I have user service running shell script, which is trying to access lockscreen state of my session like this: # Test Unity screen-lock: isLocked() { isLocked=$(gdbus call -e -d com.canonical.Unity -o /com/canonical/Unity/Session -m com.canonical.Unity.Session.IsLocked) } lock() { if [[ $isLocked == "(false,)" ]]; then gnome-screensaver-command -l elif [[ $isLocked == "(true,)" ]]; then exit 1 fi exit 0 } The problem is service “is a per-user process, and not per-session”, and I don't know how

How dynamically export methods to dbus using python, without static decorator?

由 孤街浪徒 提交于 2020-01-07 04:17:05
问题 I searched for an answer to this question in several places, but I could not find a consistent solution, and some are too old and unclear. I have a classe where the interface path for dbus is generated in runtime, so I need to export methods with the properly interface, for example: One instance of my service start dbus with interface br.example.MyInterface.Number1 , and a second instance of service start dbus with br.example.MyInterface.Number2 , so the decorator for each method will be: br

认识与使用systemctl命令

由 假如想象 提交于 2020-01-06 23:33:23
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 一、systemctl介绍 通常，Linux 的启动一直采用init进程。 我们经常看到 $ sudo /etc/init.d/apache2 start 或者 $ service apache2 start 这种方法有两个缺点： 一是启动时间长。init进程是串行启动，只有前一个进程启动完，才会启动下一个进程。 二是启动脚本复杂。init进程只是执行启动脚本，不管其他事情。脚本需要自己处理各种情况，这往往使得脚本变得很长。 为此，LINXU设计引入了Systemd 它的设计目标是，为系统的启动和管理提供一套完整的解决方案。根据 Linux 惯例，字母d是守护进程（daemon）的缩写。Systemd 这个名字的含义，就是它要守护整个系统。使用了 Systemd，就不需要再用init了。Systemd 取代了initd，成为系统的第一个进程（PID 等于 1），其他进程都是它的子进程。 通过上图的命令，我们可以查看Systemd版本。 总的来说，Systemd 的优点是功能强大，使用方便，缺点是体系庞大，非常复杂。事实上，现在还有很多人反对使用 Systemd，理由就是它过于复杂，与操作系统的其他部分强耦合，违反”keep simple, keep stupid”的Unix 哲学。

dbus Variant: How to preserve boolean datatype in Python?

由 偶尔善良 提交于 2020-01-04 09:27:38
问题 I've been experimenting with dbus lately. But I can't seem to get my dbus Service to guess the correct datatypes for boolean values. Consider the following example: import gtk import dbus import dbus.service from dbus.mainloop.glib import DBusGMainLoop class Service(dbus.service.Object): def __init__(self): bus_name = dbus.service.BusName("org.foo.bar", bus = dbus.SessionBus()) dbus.service.Object.__init__(self, bus_name, "/org/foo/bar") @dbus.service.method("org.foo.bar", in_signature = "a

QtDbus is not working in Qt5.4.1 on Windows 7

由 若如初见. 提交于 2020-01-01 17:12:27
问题 When I run the Qt Creator dbus examples, they couldn't run, is there any settings or stuff for working QtDbus module or any prerequistics? for example in chat project: if (!QDBusConnection::sessionBus().isConnected()) { qWarning("Cannot connect to the D-Bus session bus.\n" "Please check your system settings and try again.\n"); return 1; } returns 1 and program terminated. 回答1: Finally I found the solution: For QtDbus module get working, The 3rd party Dbus module must be installed in Windows:

Sending a byte array (type `ay`) over D-Bus using GDBus

由 怎甘沉沦 提交于 2020-01-01 10:12:57
问题 I am trying to a byte array over D-Bus using the GDBus bindings. Can you please let me know how I can achive that. I tried googling but didnt help. Byte array contains a image file so cannot be converted to charbytearray Any help is appriciated 回答1: This question has some good ideas in the answers including for passing large amounts of data by writing the data to a file and passing the filename, or using a named pipe. Writing to a file and passing the file name might be the easiest to

D-Bus: Performance improvement practices

由 ≡放荡痞女 提交于 2020-01-01 08:05:12
问题 What are some good practices to obtain better time performance in applications that heavily utilize D-Bus? Here are a few that our team has learned through the school of hard knocks: Try to combine data entities together into a single, large structure/object to send over D-Bus IPC. Try to have all D-Bus traffic come into a single proxy at a single point in your application/process, rather than having them spread throughout your application/process. 回答1: There have been a couple of good talks

BlueZ D-Bus C or C++ Sample [closed]

由 爷，独闯天下 提交于 2020-01-01 05:07:47
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I am trying to write an application which searches Bluetooth devices nearby and communicates with them. My application is going to be written in C++, and intended to work under Linux. 4 years ago, I used BlueZ. But now, as I see, the API has been changed a lot and now it's using D-Bus. I was not experienced with
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