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CreateSysProc

Hello World
Content:
- Methods

Creates a shell SystemProcess (ie. “sh”, “su” if root or “busybox” if installed) which can be reused throughout the program.

sys = app.CreateSysProc( cmd, env, dir, options ) → app object: SysProc

If env or dir are not provided HOME and TMDDIR are set by the component.

Example - Basic

function OnStart()
{
    lay = app.CreateLayout( "linear" );

    txt = app.CreateText( "", 1, 1, "Log,Monospace,autoscale" );
    lay.AddChild( txt );

    app.AddLayout( lay );

    sys = app.CreateSysProc( "sh" );
    sys.Out( "netstat\n" );
    sys.SetOnInput( sys_OnInput );
    sys.SetOnError( sys_OnError );
    sys.Out( "netstoat\n" );
}

function sys_OnInput( msg )
{
    txt.Log( msg );
}

function sys_OnError( msg )
{
    txt.Log( msg );
}
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Example - Colored

function OnStart()
{
    lay = app.CreateLayout( "linear" );

    scr = app.CreateScroller( 1, 1, "horizontal" );
    lay.AddChild( scr );

    txt = app.CreateText( "", 1, -1, "monospace,log" );
    txt.SetTextSize( 8 );
    txt.SetLog( 1000 );
    scr.AddChild( txt );

    app.AddLayout( lay );

    sys = app.CreateSysProc( "sh" );
    sys.SetOnInput( sys_OnInput );
    sys.SetOnError( sys_OnError );

    Exec( "netstat\n" );

    // filter files containing 'D' in /sdcard/ and forward to stderr
    Exec( "ls -al /sdcard/ | grep D >&2\n" );

}

function Exec( cmd )
{
    sys.Out( cmd );
    txt.Log( cmd, "green" );
    scr.ScrollTo( 0, txt.GetHeight() );
}

function sys_OnInput( msg )
{
    txt.Log( msg );
    scr.ScrollTo( 0, txt.GetHeight() );
}

function sys_OnError( msg )
{
    txt.Log( msg, "red" );
    scr.ScrollTo( 0, txt.GetHeight() );
}
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Methods

The following methods are available on the SysProc object:

Batch( properties )
Err( maxLines, options )
GetType() → String: “SysProc”
In( maxLines, options )
Method( name, types, p1, p2, p3, p4 ) → all types
Out( command )
ReadFileAsByte( file ) → Number: bytes
SetOnError( callback )
SetOnInput( callback )
WriteToFile( file, data )
String
Number: integer
String: path to folder ( “/absolute/...” or “relative/...” )
String: path to file ( “/absolute/...” or “relative/...” )
String: program name: “sh” or “su” or “busybox”
String: comma “,” separated: “combine” or “builder”
String: comma “,” separated: “nowait”
Object: { COMMAND }
List: boolean,char,byte,short,int,long,float,double,String,CharSequence,...
function( data )
sys.Batch
Batch method calls to be able to set all object's properties at once.
Note that you need to specify each parameter (use “” or null to leave some out)
Inherited methods can be called by appending an underscore to the function name (ie. txt.Batch({ SetBackColor_: [“red”] })
sys.Err
Read data from stderr
sys.GetType
Returns the control class name.
sys.In
Read data from stdin
sys.Method
Allows access to other functions defined on the object in Java via reflection.

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sys.Out
Writes a command to stdout. A trailing linebreak will execute it.
sys.ReadFileAsByte
Returns the first byte of a file.
sys.SetOnError
Define a callback function which is called when something was written to stderr
sys.SetOnInput
Define a callback function which is called when something was written to stdout
sys.WriteToFile
Write a binary string to a file.