/*-------------------------------------------------------------------*/
/* testsignal.c                                                      */
/* The signal system call.                                           */
/*-------------------------------------------------------------------*/

#include <signal.h>
#include <stdio.h>

void mySignalHandler(int iSignal)
{
   printf("In mySignalHandler with argument %d\n", iSignal);
   /* Reset the signal handler. */
   signal(iSignal, mySignalHandler);
}

int main(int argc, char *argv[])
{
   signal(SIGHUP, mySignalHandler);
   signal(SIGINT, mySignalHandler);
   signal(SIGQUIT, mySignalHandler);
   signal(SIGILL, mySignalHandler);
   signal(SIGTRAP, mySignalHandler);
   signal(SIGIOT, mySignalHandler);
   signal(SIGEMT, mySignalHandler);
   signal(SIGFPE, mySignalHandler);
   signal(SIGKILL, mySignalHandler);  /* Has no effect */
   signal(SIGBUS, mySignalHandler);
   signal(SIGSEGV, mySignalHandler);
   signal(SIGSYS, mySignalHandler);
   signal(SIGPIPE, mySignalHandler);
   signal(SIGALRM, mySignalHandler);
   signal(SIGTERM, mySignalHandler);
   signal(SIGUSR1, mySignalHandler);
   signal(SIGUSR2, mySignalHandler);
   signal(SIGCHLD, mySignalHandler);
   signal(SIGPWR, mySignalHandler);
   signal(SIGWINCH, mySignalHandler);
   signal(SIGURG, mySignalHandler);
   signal(SIGIO, mySignalHandler);
   signal(SIGSTOP, mySignalHandler);
   signal(SIGTSTP, mySignalHandler);
   signal(SIGCONT, mySignalHandler);
   signal(SIGTTIN, mySignalHandler);
   signal(SIGTTOU, mySignalHandler);
   signal(SIGVTALRM, mySignalHandler);
   signal(SIGPROF, mySignalHandler);
   signal(SIGXCPU, mySignalHandler);
   signal(SIGXFSZ, mySignalHandler);

   printf("Entering an infinite loop\n");
   for (;;)
      ;

   return 0;
}

/* Sample execution:

--> gcc -Wall -ansi -pedantic -o testsignal testsignal.c
--> testsignal
Entering an infinite loop
^CIn mySignalHandler with argument 2
^ZIn mySignalHandler with argument 24

*/

/* Note:  Must use "kill -9" command from another terminal to stop. */