Shut down a specified process after the system is idle for a period of time

Principle: Use the screen in Ubuntu to protect the status of the process (gnome-screensaver-command-q) (its principle is to automatically lock the screen after the system is idle for a certain period of time ), determines that the computer is idle and executes a specificProgram.

 #  ! /Bin/sh  
#  This program is used to end the specified program after a certain period of time.  
#  /Usr/bin/mentohust-K can also be used to end the mentohust Process  
   
Taskkill ()
{
 If [$ #  -Ne 2]; then  
 PID = $ (PS ax | grep $1 | Awk '{ If ( $0 !~ /Grep/) {print $1 }}')
 #  Echo "pid = $ PID"  
          If [-N "  $ PID  " ]; Then
Kill-9 $ PID >/Dev/null 2> & 1
Fi
 Return 0
Fi
 #  Echo "Num: $"  
      Return 1
}

 Process = "  Mentohust  " 
SSN = "  The screen saver status is inactive.  "   
SSA ="  The screen saver status is active.  "   
Log = "  /Tmp/taskkill. Log $  " 

 While :
 Do   
State = $ (gnome-screensaver-command-Q 2>/dev/null)
 If [ "  $ State  " = " $ SSA  " ]
Then
Taskkill $ Process 
 Break 
 Else 
Echo "  The Screen Saver is still not active  " $ (Date)> $ Log 
Sleep 300
Fi
Done
Echo " Screen Saver active! At  " $ (Date)> $ Log