使用sigaction处理SIGINT时阻塞SIGQUIT

# include <stdio. h>
# include <signal.h>
# define INPUTLEN 100 
void inthandler();
int main() 
{
   struct sigaction newhandler; 
   sigset_t blocked; 
   char x[INPUTLEN];
   newhandler.sa_handler=inthandler;
   newhandler.sa_flags=SA_RESETHAND|SA_RESTART;

   sigemptyset(&blocked);
   sigaddset(&blocked,SIGQUIT);
   newhandler.sa_mask=blocked;


   if( sigaction( SIG1NT, &newhandler, NULL) = = - 1 ) 
       perror("sigaction"); 
   else 
       whileC 1 ) 
      { 
         fgets(x,INLUTLEN,stdin);
         printf("input:%s",x);
      }
}
void inthandler( int s) 
{
    printf( "Called with signal 屯 d\n飞的 J
    sleep(s); 
    printf("done handling signal %d\n",s);
}