sig2.c

这个资料非常不错

/**********
 *sig2.c * 
 **********/
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <signal.h>
#include <unistd.h>
#include <errno.h>

#define PROMPT "Do U want to terminate program?"

char *prompt=PROMPT;

void ctrl_c_op(int signo)
{
char c;
write(STDERR_FILENO,prompt,strlen(prompt));
if((c=getchar())=='y')
	exit(0);
}

int  main()
{
 struct sigaction act;
 
  act.sa_handler=ctrl_c_op;
  sigemptyset(&act.sa_mask);
  act.sa_flags=0;
  if(sigaction(SIGINT,&act,NULL)<0)
  {
   fprintf(stderr,"Install Signal Action Error:%s\n\a",strerror(errno));
   exit(1);
  }
  while(1);
}