Ubuntu OS App runtime enviroment

In this post. We will introduce the Ubuntu OS Runtime environment. In the article "app confinement:security policy for click Packages", we see that it has a runtime environment that describes an application. Here, let's take a sample to show how an application's runtime environment really is.

Here we can refer to my previous article "C + + and QML hybrid programming on Ubuntu", which we download in the article:

BZR Branch lp:~liu-xiao-guo/debiantrial/readenv

By entering the above sentences in a terminal, you can download the software from the routines.

At the same time, we make changes to our main program file "READENV.QML" such as the following:

Import QtQuick 2.0import ubuntu.components 0.1import Ubuntu.Components.ListItems 0.1 as Listitemimport readenv 1.0import    "UI"/*!           \brief MainView with Tabs element.  First Tab have a single Label and second Tab have a single Toolbaraction.*/mainview {id:root//ObjectName For functional testing purposes (AUTOPILOT-QT5) ObjectName: "MainView"//note! ApplicationName needs to match the "name" field of the click Manifest ApplicationName: "Com.ubuntu.developer.liu-xiao-g Uo. Readenv "anchortokeyboard:true/* This property enables the application-change orientation when the Devi CE is rotated.    The default is False. * *//automaticorientation:true Width:units.gu (height:units.gu) property string App_pkgname Readen v {id:readenv} flickable {id:scrollwidget anchors.fill:parent contentheight:conte NtItem.childrenRect.height boundsbehavior: (Contentheight > Root.height)? 
 
 
 Flickable.DragAndOvershootBounds:Flickable.StopAtBounds/* Set the direction to workaround https://bugreports.qt        -project.org/browse/qtbug-31905 otherwise the UI might end up in a situation where scrolling doesn ' t work */ FlickableDirection:Flickable.VerticalFlick Column {anchors.left:parent.left Anchors.ri                Ght:parent.right listitem.base {height:ubuntuLabel.height + runtime.height + units.gu (6)                    Column {anchors.left:parent.left Anchors.right:parent.right                        Anchors.centerIn:parent Spacing:units.gu (2) Label { Id:ubuntulabel anchors.horizontalCenter:parent.horizontalCenter text: "? "FontSize:" X-large "} Label {Id:ru                   Ntime     Anchors.horizontalCenter:parent.horizontalCenter text: "Runtime Environment" }}} listitem.subtitled {text:i18n.tr ("Ubuntu_application_isolat                ION ") subText:readEnv.getenv (" Ubuntu_application_isolation ")} listitem.subtitled { text:i18n.tr ("app_id") subText:readEnv.getenv ("app_id")} LISTITEM.S            ubtitled {text:i18n.tr ("Xdg_cache_home") subText:readEnv.getenv ("Xdg_cache_home") } listitem.subtitled {text:i18n.tr ("Xdg_config_home") subText:readEnv.gete                NV ("Xdg_config_home")} listitem.subtitled {text:i18n.tr ("Xdg_data_home") SubText:readEnv.getenv ("Xdg_data_home")} listitem.subtitled {text:i18n.tr ("       Xdg_runtime_dir ")         SubText:readEnv.getenv ("Xdg_runtime_dir")} listitem.subtitled {text:i18n                . TR ("TMPDIR") subText:readEnv.getenv ("TMPDIR")} listitem.subtitled {                text:i18n.tr ("pwd") subText:readEnv.getenv ("pwd")} listitem.subtitled {                text:i18n.tr ("App_pkgname") Subtext:app_pkgname} listitem.subtitled {                 text:i18n.tr ("path") subText:readEnv.getenv ("Path")} listitem.subtitled {            text:i18n.tr ("Ld_library_path") subText:readEnv.getenv ("Ld_library_path")} listitem.subtitled {text:i18n.tr ("Qml2_import_path") subText:readEnv.getenv ("QML        2_import_path ")}}} component.oncompleted: {var app_id = readenv.getenv (" app_id "); Console.log ("app_id:" + app_id);    App_pkgname = App_id.split ('_') [0] Console.log ("App_pkgname:" + app_pkgname); }}

We were able to read the application's environment variables through the READENV library we designed.

To execute our program. Show demo samples such as the following:

watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvvwj1bnr1vg91y2g=/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/ Dissolve/70/gravity/center "width=" "height=" >

In the article, it mentions such as the following folder, which should have read and Write permissions:

• Xdg_cache_home/<app_pkgname>
• Xdg_config_home/<app_pkgname>
• Xdg_data_home/<app_pkgname>
• Xdg_runtime_dir/<app_pkgname>
• Xdg_runtime_dir/confined/<app_pkgname> (for TMPDIR)

For our applications. That is, for example, the following folder has read and Write permissions:

• /home/phablet/.cache/com.ubuntu.developer.liu-xiao-guo.readenv
• /home/phablet/.config/com.ubuntu.developer.liu-xiao-guo.readenv
• /home/phablet/.local/share/com.ubuntu.developer.liu-xiao-guo.readenv
• /run/user/32011/confined/com.ubuntu.developer.liu-xiao-guo.readenv

The source code for the entire program can be found in the following address:

BZR BranchLP:~LIU-XIAO-GUO/DEBIANTRIAL/RUNTIMEEVN

a more complete routine in: Git clone https://gitcafe.com/ubuntu/runtimeenv.git
Notice that in the new routine. We can use readenv.getenv or readenv.getenv1 two ways to get the value of an environment variable at the same time.

Ubuntu OS App runtime enviroment