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<h1>Target Communication Framework Services - System Monitor</h1>

<ul>
    <li><a href='#VersionHistory'>Version History</a>
    <li><a href='#Overview'>Overview</a>
    <li><a href='#Cmds'>Commands</a>
    <ul>
        <li><a href='#CmdGetContext'>Get Context</a>
        <li><a href='#CmdGetChildren'>Get Children</a>
        <li><a href='#CmdGetCommandLine'>Get Command Line</a>
        <li><a href='#CmdGetEnvironment'>Get Environment</a>
    </ul>
    <li><a href='#Events'>Events</a>
    <li><a href='#API'>API</a>
</ul>

<h1>System Monitor Service</h1>

<h2><a name='VersionHistory'>Version History</a></h2>

<table border=1 cellpadding=8>
    <tr>
        <th>Version
        <th>Date
        <th>Change
    <tr>
        <td>0.1
        <td>2008-01-10
        <td>Initial contribution
    <tr>
        <td>1.4
        <td>2015-06-15
        <td>Added context properties "Exe" and "ExeType"
</table>

<h2><a name='Overview'>Overview</a></h2>

<p>The service can be used for monitoring system activity and utilization.
It provides list of running processes, different process attributes like command line, environment, etc.,
and some resource utilization data. The service can be used by a client to provide functionality
similar to Unix 'top' utility or Windows 'Task Manager'.</p>

<p>Command and event parameters are encoded
as zero terminated <a href='TCF Specification.html#JSON'>JSON</a> strings.</p>

<p>The service uses standard format for error reports,
see <a href='TCF Services.html#ErrorFormat'>Error Report Format</a>.</p>

<h2><a name='Cmds'>Commands</a></h2>

<h3><a name='CmdGetContext'>Get Context</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C &bull; <i>&lt;token&gt;</i> &bull; SysMonitor &bull; getContext &bull; <i>&lt;string: context ID&gt;</i> &bull;
</font></b></pre>

<p>The command retrieves context info for given context ID.
A context corresponds to an execution thread or process.
Context IDs are valid across TCF services, so it is allowed to issue 'SysMonitor.getContext'
command with a context that was obtained from another service.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R &bull; <i>&lt;token&gt;</i> &bull; <i>&lt;error report&gt;</i> &bull; <i>&lt;context data&gt;</i> &bull;

<i>&lt;context data&gt;</i>
    &rArr; null
    &rArr; <i>&lt;object&gt;</i>
</font></b></pre>

<p>Context data object should, at least, contain member
<b><font face="Courier New" size=2 color=#333399>"ID" : <i>&lt;string&gt;.</i></font></b>
</p>

<p>Predefined context properties are:</p>
<ul>
    <li><code><b><font face="Courier New" size=2 color=#333399>"ID" : <i>&lt;string&gt;</i></font></b></code>
    - ID of the context, same as getContext command argument.

    <li><code><b><font face="Courier New" size=2 color=#333399>"ParentID" : <i>&lt;string&gt;</i></font></b></code>
    - parent context ID.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CWD" : <i>&lt;string&gt;</i></font></b></code>
    - current working directory of the process.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Root" : <i>&lt;string&gt;</i></font></b></code>
    - the process's root directory (as set by chroot).

    <li><code><b><font face="Courier New" size=2 color=#333399>"UID" : <i>&lt;int&gt;</i></font></b></code>
    - User ID of the process owner.

    <li><code><b><font face="Courier New" size=2 color=#333399>"UGID" : <i>&lt;int&gt;</i></font></b></code>
    - Group ID of the process owner.

    <li><code><b><font face="Courier New" size=2 color=#333399>"UserName" : <i>&lt;string&gt;</i></font></b></code>
    - user name of the process owner.

    <li><code><b><font face="Courier New" size=2 color=#333399>"GroupName" : <i>&lt;string&gt;</i></font></b></code>
    - group name of the process owner.

    <li><code><b><font face="Courier New" size=2 color=#333399>"PID" : <i>&lt;int&gt;</i></font></b></code>
    - system process ID.

    <li><code><b><font face="Courier New" size=2 color=#333399>"File" : <i>&lt;string&gt;</i></font></b></code>
    - executable file of the process.

    <li><code><b><font face="Courier New" size=2 color=#333399>"State" : <i>&lt;string&gt;</i></font></b></code>
    - one character from the string "RSDZTW"  where  R  is  running,  S  is
    sleeping  in  an  interruptible wait, D is waiting in uninterruptible
    disk sleep, Z is zombie, T is traced or stopped (on a signal), and  W
    is paging.

    <li><code><b><font face="Courier New" size=2 color=#333399>"PPID" : <i>&lt;int&gt;</i></font></b></code>
    - system ID of the parent process.

    <li><code><b><font face="Courier New" size=2 color=#333399>"PGRP" : <i>&lt;int&gt;</i></font></b></code>
    - the process group ID of the process.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Session" : <i>&lt;int&gt;</i></font></b></code>
    - the session ID of the process.

    <li><code><b><font face="Courier New" size=2 color=#333399>"TTY" : <i>&lt;int&gt;</i></font></b></code>
    - the tty the process uses.

    <li><code><b><font face="Courier New" size=2 color=#333399>"TGID" : <i>&lt;int&gt;</i></font></b></code>
    - the process group ID of the process which currently owns the tty that
    the process is connected to.

    <li><code><b><font face="Courier New" size=2 color=#333399>"TracerPID" : <i>&lt;int&gt;</i></font></b></code>
    - ID of a process that has attached this process for tracing or debugging.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Flags" : <i>&lt;int&gt;</i></font></b></code>
    - the kernel flags word of the process. Details depend on the kernel.

    <li><code><b><font face="Courier New" size=2 color=#333399>"MinFlt" : <i>&lt;int&gt;</i></font></b></code>
    - the  number  of  minor  faults  the  process  has made which have not
    required loading a memory page from disk.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CMinFlt" : <i>&lt;int&gt;</i></font></b></code>
    - the number of minor faults that  the  process's  waited-for  children have made.

    <li><code><b><font face="Courier New" size=2 color=#333399>"MajFlt" : <i>&lt;int&gt;</i></font></b></code>
    - the  number  of major faults the process has made which have required
    loading a memory page from disk.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CMajFlt" : <i>&lt;int&gt;</i></font></b></code>
    - the number of major faults that  the  process's  waited-for  children
    have made.

    <li><code><b><font face="Courier New" size=2 color=#333399>"UTime" : <i>&lt;int&gt;</i></font></b></code>
    - the number of milliseconds that this process has been scheduled in user mode.

    <li><code><b><font face="Courier New" size=2 color=#333399>"STime" : <i>&lt;int&gt;</i></font></b></code>
    - the number of milliseconds that this process has been scheduled in kernel mode.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CUTime" : <i>&lt;int&gt;</i></font></b></code>
    - the  number  of  jiffies that this process's waited-for children have
    been scheduled in user mode.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CSTime" : <i>&lt;int&gt;</i></font></b></code>
    - the  number  of  jiffies that this process's waited-for children have
    been scheduled in user mode.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Priority" : <i>&lt;int&gt;</i></font></b></code>
    - the standard nice value.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Nice" : <i>&lt;int&gt;</i></font></b></code>
    - the nice value.

    <li><code><b><font face="Courier New" size=2 color=#333399>"ITRealValue" : <i>&lt;int&gt;</i></font></b></code>
    - the time in milliseconds before the next SIGALRM is sent  to  the  process
    due to an interval timer.

    <li><code><b><font face="Courier New" size=2 color=#333399>"StartTime" : <i>&lt;int&gt;</i></font></b></code>
    - the time in milliseconds the process started after system boot.

    <li><code><b><font face="Courier New" size=2 color=#333399>"VSize" : <i>&lt;int&gt;</i></font></b></code>
    - virtual memory size in bytes.

    <li><code><b><font face="Courier New" size=2 color=#333399>"PSize" : <i>&lt;int&gt;</i></font></b></code>
    - memory pages size in bytes.

    <li><code><b><font face="Courier New" size=2 color=#333399>"RSS" : <i>&lt;int&gt;</i></font></b></code>
    - resident  Set  Size:  number of pages the process has in real memory,
    minus used for administrative purposes. This is  just  the  pages  which
    count  towards  text,  data,  or  stack space.  This does not include
    pages which have not been demand-loaded in, or which are swapped out.

    <li><code><b><font face="Courier New" size=2 color=#333399>"RLimit" : <i>&lt;int&gt;</i></font></b></code>
    - current  limit in bytes on the rss of the process.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CodeStart" : <i>&lt;int&gt;</i></font></b></code>
    - the address above which program text can run.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CodeEnd" : <i>&lt;int&gt;</i></font></b></code>
    - the address below which program text can run.

    <li><code><b><font face="Courier New" size=2 color=#333399>"StackStart" : <i>&lt;int&gt;</i></font></b></code>
    - the address of the start of the stack.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Signals" : <i>&lt;int&gt;</i></font></b></code>
    - the bitmap of pending signals.

    <li><code><b><font face="Courier New" size=2 color=#333399>"SigBlock" : <i>&lt;int&gt;</i></font></b></code>
    - the bitmap of blocked signals.

    <li><code><b><font face="Courier New" size=2 color=#333399>"SigIgnore" : <i>&lt;int&gt;</i></font></b></code>
    - the bitmap of ignored signals.

    <li><code><b><font face="Courier New" size=2 color=#333399>"SigCatch" : <i>&lt;int&gt;</i></font></b></code>
    - the bitmap of caught signals.

    <li><code><b><font face="Courier New" size=2 color=#333399>"WChan" : <i>&lt;int&gt;</i></font></b></code>
    - this  is  the  "channel"  in which the process is waiting.  It is the
    address of a system call, and can be looked up in a namelist  if  you
    need  a  textual  name.

    <li><code><b><font face="Courier New" size=2 color=#333399>"NSwap" : <i>&lt;int&gt;</i></font></b></code>
    - number of pages swapped.

    <li><code><b><font face="Courier New" size=2 color=#333399>"CNSwap" : <i>&lt;int&gt;</i></font></b></code>
    - cumulative NSwap for child processes.

    <li><code><b><font face="Courier New" size=2 color=#333399>"ExitSignal" : <i>&lt;int&gt;</i></font></b></code>
    - signal to be sent to parent when this process exits.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Processor" : <i>&lt;int&gt;</i></font></b></code>
    - CPU number last executed on.

    <li><code><b><font face="Courier New" size=2 color=#333399>"RTPriority" : <i>&lt;int&gt;</i></font></b></code>
    - real-time scheduling priority.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Policy" : <i>&lt;int&gt;</i></font></b></code>
    - scheduling policy.

    <li><code><b><font face="Courier New" size=2 color=#333399>"Exe" : <i>&lt;string&gt;</i></font></b></code>
    - full path to executable file of a process (since 1.4).

    <li><code><b><font face="Courier New" size=2 color=#333399>"ExeType" : <i>&lt;int&gt;</i></font></b></code>
    - executable type: 0 = user process, 1 = kernel thread, 2 = access denied (since 1.4).
</ul>

<h3><a name='CmdGetChildren'>Get Children</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C &bull; <i>&lt;token&gt;</i> &bull; SysMonitor &bull; getChildren &bull; <i>&lt;string: parent context ID&gt;</i> &bull;
</font></b></pre>

<p>The command requests a list of contexts available for System Monitor commands.</p>

<p>Parent context ID can be null &ndash; to retrieve top level of the hierarchy, can be one
of context IDs retrieved by previous getChildren commands, or it can be obtained from another service.
Contexts hierarchy can be simple plain list or it can form a tree. It is up to target agent developers to
choose layout that is most descriptive for a given target.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R &bull; <i>&lt;token&gt;</i> &bull; <i>&lt;error report&gt;</i> &bull; <i>&lt;array of context IDs&gt;</i> &bull;

<i>&lt;array of context IDs&gt;</i>
    &rArr; null
    &rArr; [ ]
    &rArr; [ <i>&lt;context ID list&gt;</i> ]

<i>&lt;context ID list&gt;</i>
    &rArr; <i>&lt;string: context ID&gt;</i>
    &rArr; <i>&lt;context ID list&gt;</i> , <i>&lt;string: context ID&gt;</i>
</font></b></pre>

<h3><a name='CmdGetCommandLine'>Get Command Line</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C &bull; <i>&lt;token&gt;</i> &bull; SysMonitor &bull; getCommandLine &bull; <i>&lt;string: context ID&gt;</i> &bull;
</font></b></pre>

<p>The command requests a list of process command line arguments.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R &bull; <i>&lt;token&gt;</i> &bull; <i>&lt;error report&gt;</i> &bull; <i>&lt;array of string&gt;</i> &bull;

<i>&lt;array of string&gt;</i>
    &rArr; null
    &rArr; [ ]
    &rArr; [ <i>&lt;string list&gt;</i> ]

<i>&lt;string list&gt;</i>
    &rArr; <i>&lt;string&gt;</i>
    &rArr; <i>&lt;string list&gt;</i> , <i>&lt;string&gt;</i>
</font></b></pre>

<h3><a name='CmdGetEnvironment'>Get Environment</a></h3>

<pre><b><font face="Courier New" size=2 color=#333399>
C &bull; <i>&lt;token&gt;</i> &bull; SysMonitor &bull; getEnvironment &bull; <i>&lt;string: context ID&gt;</i> &bull;
</font></b></pre>

<p>The command requests a list of process environment variables.</p>

<p>Reply:</p>

<pre><b><font face="Courier New" size=2 color=#333399>
R &bull; <i>&lt;token&gt;</i> &bull; <i>&lt;error report&gt;</i> &bull; <i>&lt;array of string&gt;</i> &bull;
</font></b></pre>

<h2><a name='Events'>Events</a></h2>

<p>No events are currently defined for System Monitor service.</p>

<h2><a name='API'>API</a></h2>

<pre>
<font color=#7F0055>public interface</font> ISysMonitor <font color=#7F0055>extends</font> IService {

   <font color=#7F0055>static final</font> String NAME = "SysMonitor";

    <font color=#3F5FBF>/**
     * Retrieve context info for given context ID.
     *
     * <font color=#7F9FBF>@param</font> id &ndash; context ID.
     * <font color=#7F9FBF>@param</font> done - callback interface called when operation is completed.
     */</font>
    IToken getContext(String id, DoneGetContext done);

    <font color=#3F5FBF>/**
     * Client callback interface for getContext().
     */</font>
    <font color=#7F0055>interface</font> DoneGetContext {
        <font color=#3F5FBF>/**
         * Called when contexts data retrieval is done.
         * <font color=#7F9FBF>@param</font> error &ndash; error description if operation failed, null if succeeded.
         * <font color=#7F9FBF>@param</font> context &ndash; context data.
         */</font>
        <font color=#7F0055>void</font> doneGetContext(IToken token, Exception error, SysMonitorContext context);
    }

    <font color=#3F5FBF>/**
     * Retrieve children of given context.
     *
     * <font color=#7F9FBF>@param</font> parent_context_id &ndash; parent context ID. Can be null &ndash;
     * to retrieve top level of the hierarchy, or one of context IDs retrieved
     * by previous getContext or getChildren commands.
     * <font color=#7F9FBF>@param</font> done - callback interface called when operation is completed.
     */</font>
    IToken getChildren(String parent_context_id, DoneGetChildren done);

    <font color=#3F5FBF>/**
     * Client callback interface for getChildren().
     */</font>
    <font color=#7F0055>interface</font> DoneGetChildren {
        <font color=#3F5FBF>/**
         * Called when contexts data retrieval is done.
         * <font color=#7F9FBF>@param</font> error &ndash; error description if operation failed, null if succeeded.
         * <font color=#7F9FBF>@param</font> context_ids &ndash; array of available context IDs.
         */</font>
        <font color=#7F0055>void</font> doneGetChildren(IToken token, Exception error, String[] context_ids);
    }

    <font color=#3F5FBF>/**
     * Context property names.
     */</font>
    <font color=#7F0055>static final</font> String
        <font color=#3F5FBF>/** The TCF context ID */</font>
        PROP_ID = "ID",

        <font color=#3F5FBF>/** The TCF parent context ID */</font>
        PROP_PARENTID = "ParentID",

        <font color=#3F5FBF>/** Current working directory of the process */</font>
        PROP_CWD = "CWD",

        <font color=#3F5FBF>/** The process's root directory (as set by chroot) */</font>
        PROP_ROOT = "Root",

        <font color=#3F5FBF>/** User ID of the process owner */</font>
        PROP_UID = "UID",

        <font color=#3F5FBF>/** Group ID of the process owner */</font>
        PROP_UGID = "UGID",

        <font color=#3F5FBF>/** User name of the process owner */</font>
        PROP_USERNAME = "UserName",

        <font color=#3F5FBF>/** Group name of the process owner */</font>
        PROP_GROUPNAME = "GroupName",

        <font color=#3F5FBF>/** System process ID */</font>
        PROP_PID = "PID",

        <font color=#3F5FBF>/** Executable file of the process */</font>
        PROP_FILE = "File",

        <font color=#3F5FBF>/** One character from the string "RSDZTW"  where  R  is  running,  S  is
         *  sleeping  in  an  interruptible wait, D is waiting in uninterruptible
         *  disk sleep, Z is zombie, T is traced or stopped (on a signal), and  W
         *  is paging.*/</font>
        PROP_STATE = "State",

        <font color=#3F5FBF>/** System ID of the parent process */</font>
        PROP_PPID = "PPID",

        <font color=#3F5FBF>/** The process group ID of the process */</font>
        PROP_PGRP = "PGRP",

        <font color=#3F5FBF>/** The session ID of the process */</font>
        PROP_SESSION = "Session",

        <font color=#3F5FBF>/** The tty the process uses */</font>
        PROP_TTY = "TTY",

        <font color=#3F5FBF>/** The process group ID of the process which currently owns the tty that
         *  the process is connected to. */</font>
        PROP_TGID = "TGID",

        <font color=#3F5FBF>/** ID of a process that has attached this process for tracing or debugging */</font>
        PROP_TRACERPID = "TracerPID",

        <font color=#3F5FBF>/** The kernel flags word of the process. Details depend on the kernel */</font>
        PROP_FLAGS = "Flags",

        <font color=#3F5FBF>/** The  number  of  minor  faults  the  process  has made which have not
         *  required loading a memory page from disk */</font>
        PROP_MINFLT = "MinFlt",

        <font color=#3F5FBF>/** The number of minor faults that  the  process's  waited-for  children have made */</font>
        PROP_CMINFLT = "CMinFlt",

        <font color=#3F5FBF>/** The  number  of major faults the process has made which have required
         *  loading a memory page from disk */</font>
        PROP_MAJFLT = "MajFlt",

        <font color=#3F5FBF>/** The number of major faults that  the  process's  waited-for  children
         *  have made */</font>
        PROP_CMAJFLT = "CMajFlt",

        <font color=#3F5FBF>/** The number of milliseconds that this process has been scheduled in user mode */</font>
        PROP_UTIME = "UTime",

        <font color=#3F5FBF>/** The number of milliseconds that this process has been scheduled in kernel mode */</font>
        PROP_STIME = "STime",

        <font color=#3F5FBF>/** The  number  of  jiffies that this process's waited-for children have
         *  been scheduled in user mode */</font>
        PROP_CUTIME = "CUTime",

        <font color=#3F5FBF>/** The  number  of  jiffies that this process's waited-for children have
         *  been scheduled in user mode */</font>
        PROP_CSTIME = "CSTime",

        <font color=#3F5FBF>/** The standard nice value */</font>
        PROP_PRIORITY = "Priority",

        <font color=#3F5FBF>/** The nice value */</font>
        PROP_NICE = "Nice",

        <font color=#3F5FBF>/** The time in milliseconds before the next SIGALRM is sent  to  the  process
         *  due to an interval timer */</font>
        PROP_ITREALVALUE = "ITRealValue",

        <font color=#3F5FBF>/** The time in milliseconds the process started after system boot */</font>
        PROP_STARTTIME = "StartTime",

        <font color=#3F5FBF>/** Virtual memory size in bytes */</font>
        PROP_VSIZE = "VSize",

        <font color=#3F5FBF>/** Memory pages size in bytes */</font>
        PROP_PSIZE = "PSize",

        <font color=#3F5FBF>/** Resident  Set  Size:  number of pages the process has in real memory,
         *  minus used for administrative purposes. This is  just  the  pages  which
         *  count  towards  text,  data,  or  stack space.  This does not include
         *  pages which have not been demand-loaded in, or which are swapped out */</font>
        PROP_RSS = "RSS",

        <font color=#3F5FBF>/** Current  limit in bytes on the rss of the process */</font>
        PROP_RLIMIT = "RLimit",

        <font color=#3F5FBF>/** The address above which program text can run */</font>
        PROP_CODESTART = "CodeStart",

        <font color=#3F5FBF>/** The address below which program text can run */</font>
        PROP_CODEEND = "CodeEnd",

        <font color=#3F5FBF>/** The address of the start of the stack */</font>
        PROP_STACKSTART = "StackStart",

        <font color=#3F5FBF>/** The bitmap of pending signals */</font>
        PROP_SIGNALS = "Signals",

        <font color=#3F5FBF>/** The bitmap of blocked signals */</font>
        PROP_SIGBLOCK = "SigBlock",

        <font color=#3F5FBF>/** The bitmap of ignored signals */</font>
        PROP_SIGIGNORE = "SigIgnore",

        <font color=#3F5FBF>/** The bitmap of caught signals */</font>
        PROP_SIGCATCH = "SigCatch",

        <font color=#3F5FBF>/** This  is  the  "channel"  in which the process is waiting.  It is the
         *  address of a system call, and can be looked up in a name list  if  you
         *  need  a  textual  name */</font>
        PROP_WCHAN = "WChan",

        <font color=#3F5FBF>/** Number of pages swapped */</font>
        PROP_NSWAP = "NSwap",

        <font color=#3F5FBF>/** Cumulative NSwap for child processes */</font>
        PROP_CNSWAP = "CNSwap",

        <font color=#3F5FBF>/** Signal to be sent to parent when this process exits */</font>
        PROP_EXITSIGNAL = "ExitSignal",

        <font color=#3F5FBF>/** CPU number last executed on */</font>
        PROP_PROCESSOR = "Processor",

        <font color=#3F5FBF>/** Real-time scheduling priority */</font>
        PROP_RTPRIORITY = "RTPriority",

        <font color=#3F5FBF>/** Scheduling policy */</font>
        PROP_POLICY = "Policy";


    <font color=#3F5FBF>/**
     * A context corresponds to an execution thread, process, address space, etc.
     * A context can belong to a parent context. Contexts hierarchy can be simple
     * plain list or it can form a tree. It is up to target agent developers to choose
     * layout that is most descriptive for a given target. Context IDs are valid across
     * all services. In other words, all services access same hierarchy of contexts,
     * with same IDs, however, each service accesses its own subset of context's
     * attributes and functionality, which is relevant to that service.
     */</font>
    <font color=#7F0055>interface</font> SysMonitorContext {

        <font color=#3F5FBF>/**
         * Get context ID.
         * Same as getProperties().get(&ldquo;ID&rdquo;)
         */</font>
        String getID();

        <font color=#3F5FBF>/**
         * Get parent context ID.
         * Same as getProperties().get(&ldquo;ParentID&rdquo;)
         */</font>
        String getParentID();

        <font color=#3F5FBF>/**
         * Get process group ID.
         * Same as getProperties().get(&ldquo;PGRP&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getPGRP();

        <font color=#3F5FBF>/**
         * Get process ID.
         * Same as getProperties().get(&ldquo;PID&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getPID();

        <font color=#3F5FBF>/**
         * Get process parent ID.
         * Same as getProperties().get(&ldquo;PPID&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getPPID();

        <font color=#3F5FBF>/**
         * Get process TTY group ID.
         * Same as getProperties().get(&ldquo;TGID&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getTGID();

        <font color=#3F5FBF>/**
         * Get tracer process ID.
         * Same as getProperties().get(&ldquo;TracerPID&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getTracerPID();

        <font color=#3F5FBF>/**
         * Get process owner user ID.
         * Same as getProperties().get(&ldquo;UID&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getUID();

        <font color=#3F5FBF>/**
         * Get process owner user name.
         * Same as getProperties().get(&ldquo;UserName&rdquo;)
         */</font>
        String getUserName();

        <font color=#3F5FBF>/**
         * Get process owner user group ID.
         * Same as getProperties().get(&ldquo;UGID&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getUGID();

        <font color=#3F5FBF>/**
         * Get process owner user group name.
         * Same as getProperties().get(&ldquo;GroupName&rdquo;)
         */</font>
        String getGroupName();

        <font color=#3F5FBF>/**
         * Get process state.
         * Same as getProperties().get(&ldquo;State&rdquo;)
         */</font>
        String getState();

        <font color=#3F5FBF>/**
         * Get process virtual memory size in bytes.
         * Same as getProperties().get(&ldquo;VSize&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getVSize();

        <font color=#3F5FBF>/**
         * Get process virtual memory page size in bytes.
         * Same as getProperties().get(&ldquo;PSize&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getPSize();

        <font color=#3F5FBF>/**
         * Get number of memory pages in process resident set.
         * Same as getProperties().get(&ldquo;RSS&rdquo;)
         */</font>
        <font color=#7F0055>long</font> getRSS();

        <font color=#3F5FBF>/**
         * Get context executable file.
         * Same as getProperties().get(&ldquo;File&rdquo;)
         */</font>
        String getFile();

        <font color=#3F5FBF>/**
         * Get context current file system root.
         * Same as getProperties().get(&ldquo;Root&rdquo;)
         */</font>
        String getRoot();

        <font color=#3F5FBF>/**
         * Get context current working directory.
         * Same as getProperties().get(&ldquo;CWD&rdquo;)
         */</font>
        String getCurrentWorkingDirectory();

        <font color=#3F5FBF>/**
         * Get all available context properties.
         * @return Map 'property name' -> 'property value'
         */</font>
        Map&lt;String,Object&gt; getProperties();
    }

    <font color=#3F5FBF>/**
     * Get context command line.
     */</font>
    IToken getCommandLine(String id, DoneGetCommandLine done);

    <font color=#7F0055>interface</font> DoneGetCommandLine {
        <font color=#7F0055>void</font> doneGetCommandLine(IToken token, Exception error, String[] cmd_line);
    }

    <font color=#3F5FBF>/**
     * Get context environment variables.
     */</font>
    IToken getEnvironment(String id, DoneGetEnvironment done);

    <font color=#7F0055>interface</font> DoneGetEnvironment {
        <font color=#7F0055>void</font> doneGetEnvironment(IToken token, Exception error, String[] environment);
    }
}
</pre>

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