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Full Discussion: Help with Linux shell
Special Forums UNIX Desktop Questions & Answers Help with Linux shell Post 302860299 by red20132014 on Saturday 5th of October 2013 02:36:22 PM
Old 10-05-2013
Help with Linux shell

Taking a class and having trouble with this whole section.

1. What is the name of the action the shell performs on your command-line after you hit the ENTER key (i.e., to cut your command-line syntax into its constituent tokens, including its commands, options and arguments)?
Hint: It is a word that begins with a “p”

2. What is the name of the important shell variable that is used to find where the command you entered might be stored in the file system, allowing you to make changes to these locations as needed (i.e., to add your own, personal ~/bin directory to the search list)?
Hint: It is a word that begins with a “P”


3. Figure out what the following sequence of commands is trying to accomplish - that is, the end result - and write a single command-line syntax to achieve the same result, using sort as a filter (i.e., don't use sort as the first command), and without creating any new files at all (that is, other than the one that already existed before you started your command-line, and that serves as the input in this example). Do not create and then delete files in your solution. Type your command-line solution:
Hint: Do not use any temp files...

$ sort list > temp
$ lpr temp
$ rm temp
 

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XtPopupSpringLoaded()													     XtPopupSpringLoaded()

Name
  XtPopupSpringLoaded - map a spring-loaded popup from within an application.

Synopsis
  void XtPopupSpringLoaded(popup_shell)
	   Widget popup_shell;

Inputs
  popup_shell
	    Specifies the shell widget to be popped up.

Availability
  Release 4 and later.

Description
  XtPopupSpringLoaded() 	calls	      the	  functions	    registered	       on	  the	     specified	      shell's
  XtNpopupCallback callback list and pops the shell up, making it a spring-loaded shell.  A spring-loaded shell is one that is popped  up  in
  response to a button press and will pop down when the button is released.  Spring-loaded shells have events dispatched to them specially to
  ensure that they receive the button up event, even if it occurs in another window.  See XtAddGrab() for more details.

  XtPopupSpringLoaded() performs exactly like XtPopup(), except that XtPopupSpringLoaded() does the following:

  o  Sets the shell spring_loaded field to True.

  o  Always calls XtAddGrab() with exclusive set to True and spring_loaded set to True.

  See XtPopup() for details.

Usage
  You can also pop up spring loaded shells by using the XtMenuPopup action in a translation table.  This  predefined  action  calls  XtPopup-
  SpringLoaded().

  Any pop up shell can be popped down with XtPopdown(), the XtCallbackPopdown() callback function, or with the XtMenuPopdown action.

  XtPopupSpringLoaded()  was  added  in  Release  4,  and  prior to this release, the only way to pop up a spring loaded shell was to use the
  MenuPopup action (which has now been renamed XtMenuPopup).

See Also
  XtAddGrab(1), XtCreatePopupShell(1), XtMenuPopdown(1), XtMenuPopup(1), XtPopdown(1), XtPopup(1).

Xt - Pop Ups														     XtPopupSpringLoaded()
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