"信号的使用"测试

test_signal.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <signal.h>
#include <unistd.h>

long int count;

void sig_term_handler(int signum, siginfo_t *info, void *ptr)
{
  int i;
  printf("hi\n");

  for(i=0;i<3;i++){
    printf("count: %ld\n", count);
    sleep(1);
  }
}

void catch_sigterm() {
    static struct sigaction _sigact;

    memset(&_sigact, 0, sizeof(_sigact));
    _sigact.sa_sigaction = sig_term_handler;
    _sigact.sa_flags = SA_SIGINFO;

    sigaction(SIGTERM, &_sigact, NULL);
    sigaction(SIGPIPE, &_sigact, NULL);
}

int main(){
    catch_sigterm();

    int i;
    for(i=0;;i++){
      count++;
    }
}