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diff --git a/doc/afm-user-daemon.html b/doc/afm-user-daemon.html deleted file mode 100644 index 5bf56f7..0000000 --- a/doc/afm-user-daemon.html +++ /dev/null @@ -1,457 +0,0 @@ -<!DOCTYPE html> -<html> -<head> - <meta charset="utf-8"> - <meta name="generator" content="pandoc"> - <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes"> - <meta name="author" content="José Bollo"> - <meta name="author" content="Fulup Ar Foll"> - <title>The afm-user-daemon</title> - <style type="text/css">code{white-space: pre;}</style> - <link rel="stylesheet" href="doc.css"> - <!--[if lt IE 9]> - <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script> - <![endif]--> -</head> -<body> -<header> -<h1 class="title">The afm-user-daemon</h1> -<h2 class="author">José Bollo</h2> -<h2 class="author">Fulup Ar Foll</h2> -<h3 class="date">24 juin 2016</h3> -</header> -<nav id="TOC"> -<ul> -<li><a href="#the-afm-user-daemon">The afm-user-daemon</a><ul> -<li><a href="#foreword">Foreword</a></li> -<li><a href="#introduction">Introduction</a></li> -<li><a href="#tasks-of-afm-user-daemon">Tasks of <strong>afm-user-daemon</strong></a><ul> -<li><a href="#maintaining-list-of-applications">Maintaining list of applications</a></li> -<li><a href="#launching-application">Launching application</a></li> -<li><a href="#managing-instances-of-running-applications">Managing instances of running applications</a></li> -<li><a href="#installing-and-uninstalling-applications">Installing and uninstalling applications</a></li> -</ul></li> -<li><a href="#starting-afm-user-daemon">Starting <strong>afm-user-daemon</strong></a></li> -<li><a href="#launcher-configuration">Launcher Configuration</a><ul> -<li><a href="#mode-local">mode local</a></li> -<li><a href="#mode-remote">mode remote</a></li> -<li><a href="#substitutions">%substitutions</a></li> -</ul></li> -<li><a href="#the-d-bus-interface">The D-Bus interface</a><ul> -<li><a href="#overview-of-the-dbus-interface">Overview of the dbus interface</a></li> -<li><a href="#using-afm-util">Using <strong><em>afm-util</em></strong></a></li> -<li><a href="#the-protocol-over-d-bus">The protocol over D-Bus</a></li> -</ul></li> -</ul></li> -</ul> -</nav> -<h1 id="the-afm-user-daemon">The afm-user-daemon</h1> -<h2 id="foreword">Foreword</h2> -<p>This document describes application framework user daemon fundamentals. FCF (Fully Conform to Specification) implementation is still under development. It may happen that current implementation somehow diverges with specifications.</p> -<h2 id="introduction">Introduction</h2> -<p>The daemon <strong>afm-user-daemon</strong> is in charge of handling applications on behalf of a user. Its main tasks are:</p> -<ul> -<li><p>enumerate applications that end user can run and keep this list available on demand</p></li> -<li><p>start applications on behalf of end user, set user running environment, set user security context</p></li> -<li><p>list current runnable or running applications</p></li> -<li><p>stop (aka pause), continue (aka resume), terminate a running instance of a given application</p></li> -<li><p>transfer requests for installation/uninstallation of applications to the corresponding system daemon <strong>afm-system-daemon</strong></p></li> -</ul> -<p>The <strong>afm-user-daemon</strong> takes its orders from the session instance of D-Bus.</p> -<p>The figure below summarizes the situation of <strong>afm-user-daemon</strong> in the system.</p> -<pre><code>+------------------------------------------------------------+ -| User | -| +---------------------+ | -| +---------------------+ | Smack isolated | | -| | D-Bus session + | APPLICATIONS | | -| +----------+----------+ +---------+-----------+ | -| | | | -| | | | -| +----------+--------------------------+-----------+ | -| | | | -| | afm-user-daemon | | -| | | | -| +----------+----------------------+----------+----+ | -| | | : | -| | | : | -:================|======================|==========:=========: -| | | : | -| +----------+----------+ +-----+-----+ : | -| | D-Bus system +-----+ CYNARA | : | -| +----------+----------+ +-----+-----+ : | -| | | : | -| +----------+---------+ +-------+----------+----+ | -| | afm-system-daemon +----+ SECURITY-MANAGER | | -| +--------------------+ +-----------------------+ | -| | -| System | -+------------------------------------------------------------+</code></pre> -<h2 id="tasks-of-afm-user-daemon">Tasks of <strong>afm-user-daemon</strong></h2> -<h3 id="maintaining-list-of-applications">Maintaining list of applications</h3> -<p>At start <strong>afm-user-daemon</strong> scans the directories containing applications and load in memory a list of avaliable applications accessible by current user.</p> -<p>When <strong>afm-system-daemon</strong> installs or removes an application. On success it sends the signal <em>org.AGL.afm.system.changed</em>. When receiving such a signal, <strong>afm-user-daemon</strong> rebuilds its applications list.</p> -<p><strong>afm-user-daemon</strong> provides the data it collects about applications to its clients. Clients may either request the full list of avaliable applications or a more specific information about a given application.</p> -<h3 id="launching-application">Launching application</h3> -<p><strong>afm-user-daemon</strong> launches application. Its builds a secure environment for the application before starting it within a secured environment.</p> -<p>Different kind of applications can be launched.</p> -<p>This is set using a configuration file that describes how to launch an application of a given kind within a given mode.</p> -<p>There is two launching modes: local or remote.</p> -<p>Launching an application locally means that the application and its binder are launched together.</p> -<p>Launching application remotely translates in only launching the application binder. The UI by itself has to be activated remotely by the requested (ie: HTML5 homescreen in a browser)</p> -<p>Once launched, running instances of application receive a runid that identify them.</p> -<h3 id="managing-instances-of-running-applications">Managing instances of running applications</h3> -<p><strong>afm-user-daemon</strong> manages the list of applications that it launched.</p> -<p>When owning the right permissions, a client can get the list of running instances and details about a specific running instance. It can also terminates, stops or continues a given application.</p> -<h3 id="installing-and-uninstalling-applications">Installing and uninstalling applications</h3> -<p>If the client own the right permissions, <strong>afm-user-daemon</strong> delegates that task to <strong>afm-system-daemon</strong>.</p> -<h2 id="starting-afm-user-daemon">Starting <strong>afm-user-daemon</strong></h2> -<p><strong>afm-user-daemon</strong> is launched as a <strong>systemd</strong> service attached to user sessions. Normally, the service file is located at /usr/lib/systemd/user/afm-user-daemon.service.</p> -<p>The options for launching <strong>afm-user-daemon</strong> are:</p> -<pre><code>-a ---application directory - - Includes the given application directory to - the database base of applications. - - Can be repeated. - --r ---root directory - - Includes root application directory or directories when - passing multiple rootdir to - applications database. - - Note that default root directory for - applications is always added. In current version - /usr/share/afm/applications is used as default. - --m ---mode (local|remote) - - Set the default launch mode. - The default value is 'local' - --d ---daemon - - Daemonizes the process. It is not needed by sytemd. - --q ---quiet - - Reduces the verbosity (can be repeated). - --v ---verbose - - Increases the verbosity (can be repeated). - --h ---help - - Prints a short help.</code></pre> -<h2 id="launcher-configuration">Launcher Configuration</h2> -<p>It contains rules for launching applications. When <strong>afm-user-daemon</strong> has to launch an application, it looks for launch mode (local or remote), as well as for the type of application describe in <strong><em>config.xml</em></strong> widget configuration file.</p> -<p>This tuple mode+type allows to select the adequate rule.</p> -<p>Configuration file is <strong>/etc/afm/afm-launch.conf</strong>.</p> -<p>It contains sections and rules. It can also contain comments and empty lines to improve readability.</p> -<p>The separators are space and tabulation, any other character should have a meaning.</p> -<p>The format is line oriented. The new line character separate the lines.</p> -<p>Lines having only separators are blank lines and ignored. Line having character #(sharp) at first position are comment lines and ignored.</p> -<p>Lines not starting with a separator are different from lines starting with a separator character.</p> -<p>The grammar of the configuration file is defined below:</p> -<pre><code>CONF: *COMMENT *SECTION - -SECTION: MODE *RULE - -RULE: +TYPE VECTOR ?VECTOR - -MODE: 'mode' +SEP ('local' | 'remote') *SEP EOL - -TYPE: DATA *SEP EOL - -VECTOR: +SEP DATA *(+SEP NDATA) *SEP EOL - -DATA: CHAR *NCHAR -NDATA: +NCHAR - -EOL: NL *COMMENT -COMMENT: *SEP CMT *(SEP | NCHAR) NL - -NL: '\x0a' -SEP: '\x20' | '\x09' -CMT: '#' -CHAR: '\x00'..'\x08' | '\x0b'..'\x1f' | '\x21' | '\x22' | '\x24'..'\xff' -NCHAR: CMT | CHAR</code></pre> -<p>Here is a sample of configuration file for defining how to launch an application of types <em>application/x-executable</em>, <em>text/x-shellscript</em> and <em>text/html</em> in local mode:</p> -<pre><code>mode local - -application/x-executable -text/x-shellscript - %r/%c - -text/html - /usr/bin/afb-daemon --mode=local --readyfd=%R --alias=/icons:%I --port=%P --rootdir=%r --token=%S --sessiondir=%D/.afb-daemon - /usr/bin/web-runtime http://localhost:%P/%c?token=%S</code></pre> -<p>This shows that:</p> -<ul> -<li>within a section, several rules can be defined</li> -<li>within a rule, several types can be defined</li> -<li>within a rule, one or two vectors can be defined</li> -<li>vectors are using %substitution</li> -<li>launched binaries must be defined with their full path</li> -</ul> -<h3 id="mode-local">mode local</h3> -<p>Within this mode, the launchers have either one or two description vectors. All of those vectors are treated as programs and are executed with 'execve' system call.</p> -<p>The first vector is the leader vector and it defines the process group. The second vector (if any) is attached to the group defined by this first vector.</p> -<h3 id="mode-remote">mode remote</h3> -<p>Within this mode, the launchers have either one or two vectors describing them.</p> -<p>The first vector is process as a program and is executed with system call 'execve'.</p> -<p>The second vector (if any) defines a text that is returned to the caller. This mechanism can be used to return a uri for remote UI to connect on the newly launched application.</p> -<p>The daemon <strong><em>afm-user-daemon</em></strong> allocates a port for each new remote application. The current implementation port allocation is incremental. A smarter (cacheable and discoverable) allocation should be defined.</p> -<h3 id="substitutions">%substitutions</h3> -<p>Vectors can include sequences of 2 characters that have a special meaning. These sequences are named <em>%substitution</em> because their first character is the percent sign (%) and because each occurrence of the sequence is replaced, at launch time, by the value associated to sequences.</p> -<p>Here is the list of <em>%substitutions</em>:</p> -<ul> -<li><strong><em>%%</em></strong>: %.</li> -</ul> -<p>This simply emits the percent sign %</p> -<ul> -<li><strong><em>%a</em></strong>: appid</li> -</ul> -<p>Holds application Id of launched application.</p> -<p>Defined by the attribute <strong>id</strong> of the element <strong><widget></strong> of <strong>config.xml</strong>.</p> -<ul> -<li><strong><em>%b</em></strong>: bindings</li> -</ul> -<p>In the future should represent the list of bindings and bindings directory separated by ','. Warning: not supported in current version.</p> -<ul> -<li><strong><em>%c</em></strong>: content</li> -</ul> -<p>The file within the widget directory that is the entry point.</p> -<p>For HTML applications, it represents the relative path to main page (aka index.html).</p> -<p>Defined by attribute <strong>src</strong> of the element <strong><content></strong> within <strong>config.xml</strong>.</p> -<ul> -<li><strong><em>%D</em></strong>: datadir</li> -</ul> -<p>Path of the directory where the application runs (cwd) and stores its data.</p> -<p>It is equal to %h/%a.</p> -<ul> -<li><strong><em>%H</em></strong>: height</li> -</ul> -<p>Requested height for the widget.</p> -<p>Defined by the attribute <strong>height</strong> of the element <strong><widget></strong> of <strong>config.xml</strong>.</p> -<ul> -<li><strong><em>%h</em></strong>: homedir</li> -</ul> -<p>Path of the home directory for all applications.</p> -<p>It is generally equal to $HOME/app-data</p> -<ul> -<li><strong><em>%I</em></strong>: icondir</li> -</ul> -<p>Path of the directory were the icons of the applications can be found.</p> -<ul> -<li><strong><em>%m</em></strong>: mime-type</li> -</ul> -<p>Mime type of the launched application.</p> -<p>Defined by the attribute <strong>type</strong> of the element <strong><content></strong> of <strong>config.xml</strong>.</p> -<ul> -<li><strong><em>%n</em></strong>: name</li> -</ul> -<p>Name of the application as defined by the content of the element <strong><name></strong> of <strong>config.xml</strong>.</p> -<ul> -<li><strong><em>%P</em></strong>: port</li> -</ul> -<p>A port to use. It is currently a kind of random port. The precise model is to be defined later.</p> -<ul> -<li><strong><em>%R</em></strong>: readyfd</li> -</ul> -<p>Number of file descriptor to use for signaling readiness of launched process.</p> -<ul> -<li><strong><em>%r</em></strong>: rootdir</li> -</ul> -<p>Path of directory containing the widget and its data.</p> -<ul> -<li><strong><em>%S</em></strong>: secret</li> -</ul> -<p>An hexadecimal number that can be used to initialize pairing of client and application binder.</p> -<ul> -<li><strong><em>%W</em></strong>: width</li> -</ul> -<p>Requested width for the widget.</p> -<p>Defined by the attribute <strong>width</strong> of the element <strong><widget></strong> of <strong>config.xml</strong>.</p> -<h2 id="the-d-bus-interface">The D-Bus interface</h2> -<h3 id="overview-of-the-dbus-interface">Overview of the dbus interface</h3> -<p><strong><em>afm-user-daemon</em></strong> takes its orders from the session instance of D-Bus. D-Bus is nice to use in this context because it allows discovery and signaling.</p> -<p>The dbus session is by default addressed by environment variable <strong><em>DBUS_SESSION_BUS_ADDRESS</em></strong>. Using <strong>systemd</strong> variable <em>DBUS_SESSION_BUS_ADDRESS</em> is automatically set for user sessions.</p> -<p>The <strong>afm-user-daemon</strong> is listening on destination name <strong><em>org.AGL.afm.user</em></strong> at object path <strong><em>/org/AGL/afm/user</em></strong> on interface <strong><em>org.AGL.afm.user</em></strong> for following members: <strong><em>runnables</em></strong>, <strong><em>detail</em></strong>, <strong><em>start</em></strong>, <strong><em>terminate</em></strong>, <strong><em>stop</em></strong>, <strong><em>continue</em></strong>, <strong><em>runners</em></strong>, <strong><em>state</em></strong>, <strong><em>install</em></strong> and <strong><em>uninstall</em></strong>.</p> -<p>D-Bus is mainly used for signaling and discovery. Its optimized typed protocol is not used except for transmission of standalone strings.</p> -<p>Clients and Services are using JSON serialisation to exchange data.</p> -<p>The D-Bus interface is defined by:</p> -<ul> -<li><p>DESTINATION: <strong>org.AGL.afm.user</strong></p></li> -<li><p>PATH: <strong>/org/AGL/afm/user</strong></p></li> -<li><p>INTERFACE: <strong>org.AGL.afm.user</strong></p></li> -</ul> -<p>The signature of any member of the interface is <strong><em>string -> string</em></strong> for <strong><em>JSON -> JSON</em></strong>.</p> -<p>This is the normal case. In case of error, the current implementation returns a dbus error as a string.</p> -<p>Here an example using <em>dbus-send</em> to query data on installed applications.</p> -<pre><code>dbus-send --session --print-reply \ - --dest=org.AGL.afm.user \ - /org/AGL/afm/user \ - org.AGL.afm.user.runnables string:true</code></pre> -<h3 id="using-afm-util">Using <strong><em>afm-util</em></strong></h3> -<p>The command line tool <strong><em>afm-util</em></strong> uses dbus-send to send orders to <strong>afm-user-daemon</strong>. This small scripts allows to send command to <strong><em>afm-user-daemon</em></strong> either interactively at shell prompt or scriptically.</p> -<p>The syntax is simple: it accept a command and when requires attached arguments.</p> -<p>Here is the summary of <strong><em>afm-util</em></strong>:</p> -<ul> -<li><strong>afm-util runnables </strong>:</li> -</ul> -<p>list the runnable widgets installed</p> -<ul> -<li><strong>afm-util install wgt </strong>:</li> -</ul> -<p>install the wgt file</p> -<ul> -<li><strong>afm-util uninstall id </strong>:</li> -</ul> -<p>remove the installed widget of id</p> -<ul> -<li><strong>afm-util detail id </strong>:</li> -</ul> -<p>print detail about the installed widget of id</p> -<ul> -<li><strong>afm-util runners </strong>:</li> -</ul> -<p>list the running instance</p> -<ul> -<li><strong>afm-util start id </strong>:</li> -</ul> -<p>start an instance of the widget of id</p> -<ul> -<li><strong>afm-util terminate rid </strong>:</li> -</ul> -<p>terminate the running instance rid</p> -<ul> -<li><strong>afm-util stop rid </strong>:</li> -</ul> -<p>stop the running instance rid</p> -<ul> -<li><strong>afm-util continue rid </strong>:</li> -</ul> -<p>continue the previously rid</p> -<ul> -<li><strong>afm-util state rid </strong>:</li> -</ul> -<p>get status of the running instance rid</p> -<p>Here is how to list applications using <strong><em>afm-util</em></strong>:</p> -<pre><code>afm-util runnables</code></pre> -<hr /> -<h3 id="the-protocol-over-d-bus">The protocol over D-Bus</h3> -<p>Recall:</p> -<ul> -<li><p><strong>DESTINATION</strong>: org.AGL.afm.user</p></li> -<li><p><strong>PATH</strong>: /org/AGL/afm/user</p></li> -<li><p><strong>INTERFACE</strong>: org.AGL.afm.user</p></li> -</ul> -<hr /> -<h4 id="method-org.agl.afm.user.detail">Method org.AGL.afm.user.detail</h4> -<p><strong>Description</strong>: Get details about an application from its id.</p> -<p><strong>Input</strong>: the id of the application as below.</p> -<p>Either just a string:</p> -<pre><code>"appli@x.y"</code></pre> -<p>Or an object having the field "id" of type string:</p> -<pre><code>{"id":"appli@x.y"}</code></pre> -<p><strong>Output</strong>: A JSON object describing the application containing the fields described below.</p> -<pre><code>{ - "id": string, the application id (id@version) - "version": string, the version of the application - "width": integer, requested width of the application - "height": integer, resqueted height of the application - "name": string, the name of the application - "description": string, the description of the application - "shortname": string, the short name of the application - "author": string, the author of the application -}</code></pre> -<hr /> -<h4 id="method-org.agl.afm.user.runnables">Method org.AGL.afm.user.runnables</h4> -<p><strong>Description</strong>: Get the list of applications that can be run.</p> -<p><strong>Input</strong>: any valid json entry, can be anything except null.</p> -<p><strong>output</strong>: An array of description of the runnable applications. Each item of the array contains an object containing the detail of an application as described above for the method <em>org.AGL.afm.user.detail</em>.</p> -<hr /> -<h4 id="method-org.agl.afm.user.install">Method org.AGL.afm.user.install</h4> -<p><strong>Description</strong>: Install an application from its widget file.</p> -<p>If an application of the same <em>id</em> and <em>version</em> exists, it is not reinstalled except when <em>force=true</em>.</p> -<p>Applications are installed in the subdirectories of the common directory reserved for applications. If <em>root</em> is specified, the application is installed under sub-directories of defined <em>root</em>.</p> -<p>Note that this methods is a simple accessor to the method <strong><em>org.AGL.afm.system.install</em></strong> of <strong><em>afm-system-daemon</em></strong>.</p> -<p>After the installation and before returning to the sender, <strong><em>afm-user-daemon</em></strong> sends the signal <strong><em>org.AGL.afm.user.changed</em></strong>.</p> -<p><strong>Input</strong>: The <em>path</em> of widget file to be installed. Optionally, a flag to <em>force</em> reinstallation and/or a <em>root</em> directory.</p> -<p>Simple form a simple string containing the absolute widget path:</p> -<pre><code>"/a/path/driving/to/the/widget"</code></pre> -<p>Or an object:</p> -<pre><code>{ - "wgt": "/a/path/to/the/widget", - "force": false, - "root": "/a/path/to/the/root" -}</code></pre> -<p>"wgt" and "root" MUST be absolute paths.</p> -<p><strong>output</strong>: An object containing field "added" to use as application ID.</p> -<pre><code>{"added":"appli@x.y"}</code></pre> -<hr /> -<h4 id="method-org.agl.afm.user.uninstall">Method org.AGL.afm.user.uninstall</h4> -<p><strong>Description</strong>: Uninstall an application from its id.</p> -<p>Note that this methods is a simple accessor to <strong><em>org.AGL.afm.system.uninstall</em></strong> method from <strong><em>afm-system-daemon</em></strong>.</p> -<p>After the uninstallation and before returning to the sender, <strong><em>afm-user-daemon</em></strong> sends the signal <strong><em>org.AGL.afm.user.changed</em></strong>.</p> -<p><strong>Input</strong>: the <em>id</em> of the application and, optionally, the path to application <em>root</em>.</p> -<p>Either a string:</p> -<pre><code>"appli@x.y"</code></pre> -<p>Or an object:</p> -<pre><code>{ - "id": "appli@x.y", - "root": "/a/path/to/the/root" -}</code></pre> -<p><strong>output</strong>: the value 'true'.</p> -<hr /> -<h4 id="method-org.agl.afm.user.start">Method org.AGL.afm.user.start</h4> -<p><strong>Description</strong>:</p> -<p><strong>Input</strong>: the <em>id</em> of the application and, optionally, the start <em>mode</em> as below.</p> -<p>Either just a string:</p> -<pre><code>"appli@x.y"</code></pre> -<p>Or an object containing field "id" of type string and optionally a field mode:</p> -<pre><code>{"id":"appli@x.y","mode":"local"}</code></pre> -<p>The field "mode" is a string equal to either "local" or "remote".</p> -<p><strong>output</strong>: The <em>runid</em> of the application launched. <em>runid</em> is an integer.</p> -<hr /> -<h4 id="method-org.agl.afm.user.terminate">Method org.AGL.afm.user.terminate</h4> -<p><strong>Description</strong>: Terminates the application attached to <em>runid</em>.</p> -<p><strong>Input</strong>: The <em>runid</em> (an integer) of running instance to terminate.</p> -<p><strong>output</strong>: the value 'true'.</p> -<hr /> -<h4 id="method-org.agl.afm.user.stop">Method org.AGL.afm.user.stop</h4> -<p><strong>Description</strong>: Stops the application attached to <em>runid</em> until terminate or continue.</p> -<p><strong>Input</strong>: The <em>runid</em> (integer) of the running instance to stop.</p> -<p><strong>output</strong>: the value 'true'.</p> -<hr /> -<h4 id="method-org.agl.afm.user.continue">Method org.AGL.afm.user.continue</h4> -<p><strong>Description</strong>: Continues the application attached to <em>runid</em> previously stopped.</p> -<p><strong>Input</strong>: The <em>runid</em> (integer) of the running instance to continue.</p> -<p><strong>output</strong>: the value 'true'.</p> -<hr /> -<h4 id="method-org.agl.afm.user.state">Method org.AGL.afm.user.state</h4> -<p><strong>Description</strong>: Get informations about a running instance of <em>runid</em>.</p> -<p><strong>Input</strong>: The <em>runid</em> (integer) of the running instance inspected.</p> -<p><strong>output</strong>: An object describing instance state. It contains: the runid (integer), the id of the running application (string), the state of the application (string either: "starting", "running", "stopped").</p> -<p>Example of returned state:</p> -<pre><code>{ - "runid": 2, - "state": "running", - "id": "appli@x.y" -}</code></pre> -<hr /> -<h4 id="method-org.agl.afm.user.runners">Method org.AGL.afm.user.runners</h4> -<p><strong>Description</strong>: Get the list of currently running instances.</p> -<p><strong>Input</strong>: anything.</p> -<p><strong>output</strong>: An array of states, one per running instance, as returned by the methodd <strong><em>org.AGL.afm.user.state</em></strong>.</p> -</body> -</html> |