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Full Discussion: Bash: capturing *Anything* which showed on screen
Top Forums Shell Programming and Scripting Bash: capturing *Anything* which showed on screen Post 302490703 by Corona688 on Tuesday 25th of January 2011 02:01:02 PM
Old 01-25-2011
Certain things like ssh (and many other authentication systems) don't use stdin/stdout/stderr but directly open the controlling terminal, often /dev/tty (which on linux at least is kind of 'magic' in that /dev/tty is always your own terminal, no matter what that may be.) This happens after the shell runs the program, and can't be redirected.

You'd need to create your own virtual terminal device to intercept traffic at this level. The virtual terminal would be the controlling terminal and ssh would open and interact with it. This is how the expect language is able to interact with programs that demand a terminal device.
 

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LEARN ABOUT ULTRIX

defaultcolormapofscreen

BlackPixelOfScreen(3X11)					     MIT X11R4						  BlackPixelOfScreen(3X11)

Name
       BlackPixelOfScreen, WhitePixelOfScreen, CellsOfScreen, DefaultColormapOfScreen, DefaultDepthOfScreen, DefaultGCOfScreen, DefaultVisualOf-
       Screen, DoesBackingStore, DoesSaveUnders, DisplayOfScreen, XScreenNumberOfScreen, EventMaskOfScreen, HeightOfScreen, HeightMMOfScreen, Max-
       CmapsOfScreen, MinCmapsOfScreen, PlanesOfScreen, RootWindowOfScreen, WidthOfScreen, WidthMMOfScreen - screen information functions and
       macros

Syntax
       BlackPixelOfScreen(screen)

       WhitePixelOfScreen(screen)

       CellsOfScreen(screen)

       DefaultColormapOfScreen(screen)

       DefaultDepthOfScreen(screen)

       DefaultGCOfScreen(screen)

       DefaultVisualOfScreen(screen)

       DoesBackingStore(screen)

       DoesSaveUnders(screen)

       DisplayOfScreen(screen)

       int XScreenNumberOfScreen(screen)
	  Screen *screen;

       EventMaskOfScreen(screen)

       HeightOfScreen(screen)

       HeightMMOfScreen(screen)

       MaxCmapsOfScreen(screen)

       MinCmapsOfScreen(screen)

       PlanesOfScreen(screen)

       RootWindowOfScreen(screen)

       WidthOfScreen(screen)

       WidthMMOfScreen(screen)

Arguments
       screen	 Specifies a pointer to the appropriate structure.

Description
       The macro returns the black pixel value of the specified screen.

       The macro returns the white pixel value of the specified screen.

       The macro returns the number of colormap cells in the default colormap of the specified screen.

       The macro returns the default colormap of the specified screen.

       The macro returns the default depth of the root window of the specified screen.

       The macro returns the default GC of the specified screen, which has the same depth as the root window of the screen.

       The macro returns the default visual of the specified screen.

       The macro returns or which indicate whether the screen supports backing stores.

       The macro returns a Boolean value indicating whether the screen supports save unders.

       The macro returns the display of the specified screen.

       The function returns the screen index number of the specified screen.

       The macro returns the root event mask of the root window for the specified screen at connection setup.

       The macro returns the height of the specified screen.

       The macro returns the height of the specified screen in millimeters.

       The macro returns the maximum number of installed colormaps supported by the specified screen.

       The macro returns the minimum number of installed colormaps supported by the specified screen.

       The macro returns the number of planes in the root window of the specified screen.

       The macro returns the root window of the specified screen.

       The macro returns the width of the specified screen.

       The macro returns the width of the specified screen in millimeters.

See Also
       AllPlanes(3X11), ImageByteOrder(3X11), IsCursorKey(3X11)
       X Window System: The Complete Reference, Second Edition, Robert W. Scheifler and James Gettys

															  BlackPixelOfScreen(3X11)
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