CS476/576

Assignment #4

Due Midnight, Tuesday   Nov  1, 1999

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NAME

 
XK - exec  & kill processes

       XK [time-out]

DESCRIPTION

The program creates  a motif-based interface with 3 push buttons as shown in the Figure  below.
 
• EXEC: when the user activates this button, it asks him/her to enter the command to be executed (using a one-line input widget similar to driver.c &  inputfield.c). The executed  command displays its output in an xterm (similar to  xbuttons2.c).

 
• KILL: when the user activate this button, it displays a list of the currently executing commands (in a widget similar to  chooseone.c ). The program kills the the selected command and waits for the terminated process (so the process will not become zombie).

 
• QUIT: When activated (by clicking on the button, typing CTRL-C or CTRL-\ on the terminal where the XK program started), it asks for confirmation (similar to  askquestion.c ).

 
• Time-out: If the user did not interact with the XK program (by clicking on either EXEC or KILL) for a period exceeding   time-out (an optional argument to XK, which defaults to 1 minute), the program displays the Quit confirmation dialogue.

• Termination:  If  the user didn't respond to the Quit dialogue for a period exceeding time-out, or he/she clicks on the OK button of the Quit dialogue, then the  XK program kills and waits for all its active children processes before it exits.