signallistener.java

java信号处理程序

package kh.signal;

/**
   Copyright 1998 Kevin Hester, [e-mail]
   
   Commerical use prohibited - non commercial distribution is OK.
   Contact the author for further information.
*/


public interface SignalListener
    {
	/**
	   Called when the signal is generated by the operating system.

	   @param signalNum a UNIX signal number - ie SIGKILL
	*/
	public void signalReceived(int signalNum);

	/**
	   Called to determine if this listener is interested in a particular
	   signal number.  Your handler will need to implement this method
	   to tell JavaSignals what signals you want to be called for.

	   @param signalNum a UNIX signal number - ie SIGKILL
	*/
	public boolean isInterested(int signalNum);


		/**


       Signal     Value     Action   Comment
       ------------------------------------------------------------------------
       SIGHUP        1        A      Hangup detected on controlling terminal
                                    or death of controlling process
       SIGINT        2        A      Interrupt from keyboard
       SIGQUIT       3        A      Quit from keyboard
       SIGILL        4        A      Illegal Instruction
       SIGABRT       6        C      Abort signal from abort(3)
       SIGFPE        8        C      Floating point exception
       SIGKILL       9       AEF     Kill signal
       SIGSEGV      11        C      Invalid memory reference
       SIGPIPE      13        A      Broken pipe: write to pipe with no readers
       SIGALRM      14        A      Timer signal from alarm(1)
       SIGTERM      15        A      Termination signal
       SIGUSR1   30,10,16     A      User-defined signal 1
       SIGUSR2   31,12,17     A      User-defined signal 2
       SIGCHLD   20,17,18     B      Child stopped or terminated
       SIGCONT   19,18,25            Continue if stopped
       SIGSTOP   17,19,23    DEF     Stop process
       SIGTSTP   18,20,24     D      Stop typed at tty
       SIGTTIN   21,21,26     D      tty input for background process
       SIGTTOU   22,22,27     D      tty output for background process

       Next various other signals.

       Signal       Value     Action   Comment
       ---------------------------------------------------------------------
       SIGTRAP        5         CG     Trace/breakpoint trap
       SIGIOT         6         CG     IOT trap. A synonym for SIGABRT
       SIGEMT       7,-,7       G
       SIGBUS      10,7,10      AG     Bus error
       SIGSYS      12,-,12      G      Bad argument to routine (SVID)
       SIGSTKFLT    -,16,-      AG     Stack fault on coprocessor
       SIGURG      16,23,21     BG     Urgent condition on socket (4.2 BSD)
       SIGIO       23,29,22     AG     I/O now possible (4.2 BSD)
       SIGPOLL                  AG     A synonym for SIGIO (System V)
       SIGCLD       -,-,18      G      A synonym for SIGCHLD
       SIGXCPU     24,24,30     AG     CPU time limit exceeded (4.2 BSD)
       SIGXFSZ     25,25,31     AG     File size limit exceeded (4.2 BSD)
       SIGVTALRM   26,26,28     AG     Virtual alarm clock (4.2 BSD)
       SIGPROF     27,27,29     AG     Profile alarm clock
       SIGPWR      29,30,19     AG     Power failure (System V)
       SIGINFO      29,-,-      G      A synonym for SIGPWR
       SIGLOST      -,-,-       AG     File lock lost
       SIGWINCH    28,28,20     BG     Window resize signal (4.3 BSD, Sun)
       SIGUNUSED    -,31,-      AG     Unused signal
		*/

	public static final int SIG_MIN = 1;
	public static final int SIGHUP = 1;
	public static final int SIGINT = 2;
	public static final int SIGQUIT = 3;
	public static final int SIGILL = 4;
	public static final int SIGTRAP = 5;
	public static final int SIGFPE = 8;
	public static final int SIGKILL = 9;
	public static final int SIGTERM = 15;
   
	public static final int SIG_MAX = 31;

    }