sig_user.c

Linux大学上机源码学习

#include <signal.h>
#include <stdio.h>
/*#include <err_exit.h>*/
static void sig_usr(int);
int main(void)
{ 
  if (signal(SIGUSR1,sig_usr)==SIG_ERR)
      exit("cant catch SIGUS1\n");
  if(signal(SIGUSR2,sig_usr)==SIG_ERR)
      exit("cant catch SIGUS2");
for(;;)
   pause();
}
static void sig_usr(int sign)
{ if(sign==SIGUSR1)
    printf("receive SIGUS1\n");
  else if(sign==SIGUSR2)
          printf("receive SIGUS2\n");
      else
          printf("receive other");
  return;
}