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Full Discussion: Script for AT command
Top Forums Shell Programming and Scripting Script for AT command Post 302614567 by Corona688 on Wednesday 28th of March 2012 03:21:15 PM
Old 03-28-2012
Yes you do. It's a shell builtin, positively any kind of Bourne shell has it. Try this:

Code:
# Open file into FD 5
exec 5</etc/passwd
# Read from FD 5 and print it to the screen
cat <&5
# close FD 5
exec 5<&-

Not all shells support <> with exec, but bash certainly does. ksh and zsh too if I'm not mistaken.

Last edited by Corona688; 03-28-2012 at 04:27 PM..
 

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BlackPixelOfScreen(3)						  XLIB FUNCTIONS					     BlackPixelOfScreen(3)

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
unsigned long BlackPixelOfScreen(Screen *screen); unsigned long WhitePixelOfScreen(Screen *screen); int CellsOfScreen(Screen *screen); Colormap DefaultColormapOfScreen(Screen *screen); int DefaultDepthOfScreen(Screen *screen); GC DefaultGCOfScreen(Screen *screen); Visual *DefaultVisualOfScreen(Screen *screen); int DoesBackingStore(Screen *screen); Bool DoesSaveUnders(Screen *screen); Display *DisplayOfScreen(Screen *screen); int XScreenNumberOfScreen(Screen *screen); long EventMaskOfScreen(Screen *screen); int HeightOfScreen(Screen *screen); int HeightMMOfScreen(Screen *screen); int MaxCmapsOfScreen(Screen *screen); int MinCmapsOfScreen(Screen *screen); int PlanesOfScreen(Screen *screen); Window RootWindowOfScreen(Screen *screen); int WidthOfScreen(Screen *screen); int WidthMMOfScreen(Screen *screen); ARGUMENTS
screen Specifies the appropriate Screen structure. DESCRIPTION
The BlackPixelOfScreen macro returns the black pixel value of the specified screen. The WhitePixelOfScreen macro returns the white pixel value of the specified screen. The CellsOfScreen macro returns the number of colormap cells in the default colormap of the specified screen. The DefaultColormapOfScreen macro returns the default colormap of the specified screen. The DefaultDepthOfScreen macro returns the default depth of the root window of the specified screen. The DefaultGCOfScreen macro returns the default GC of the specified screen, which has the same depth as the root window of the screen. The DefaultVisualOfScreen macro returns the default visual of the specified screen. The DoesBackingStore macro returns WhenMapped, NotUseful, or Always, which indicate whether the screen supports backing stores. The DoesSaveUnders macro returns a Boolean value indicating whether the screen supports save unders. The DisplayOfScreen macro returns the display of the specified screen. The XScreenNumberOfScreen function returns the screen index number of the specified screen. The EventMaskOfScreen macro returns the root event mask of the root window for the specified screen at connection setup. The HeightOfScreen macro returns the height of the specified screen. The HeightMMOfScreen macro returns the height of the specified screen in millimeters. The MaxCmapsOfScreen macro returns the maximum number of installed colormaps supported by the specified screen. The MinCmapsOfScreen macro returns the minimum number of installed colormaps supported by the specified screen. The PlanesOfScreen macro returns the number of planes in the root window of the specified screen. The RootWindowOfScreen macro returns the root window of the specified screen. The WidthOfScreen macro returns the width of the specified screen. The WidthMMOfScreen macro returns the width of the specified screen in millimeters. SEE ALSO
AllPlanes(3), ImageByteOrder(3), IsCursorKey(3) Xlib - C Language X Interface X Version 11 libX11 1.5.0 BlackPixelOfScreen(3)
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