test1.c

来自「这个是学习嵌入式开发的重要例子」· C语言 代码 · 共 65 行

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

void handle_signal(int s);
void handle_signal_test(int s);

int global_break_flag = 0;

int main(int argc, char **argv)
{
  //signal(SIGINT, SIG_IGN);
  //signal(SIGINT, SIG_DFL);

#if 0
  fprintf(stdout, "SIGKILL = %d\n", SIGKILL);
  fprintf(stdout, "SIGCHLD = %d\n", SIGCHLD);
#endif

  // void (*signal(int sig, void (*func)(int)))(int);
  // signal(int sig, void(*func)(int));
  signal(SIGINT, handle_signal);
  //signal(SIGTERM, handle_signal);

  for (;;)
  {
    if (global_break_flag > 0)
    {
      fprintf(stdout, "break for loop.\n");
      break;
    }
  }

  unsigned long original_handler;

  original_handler = signal(SIGINT, handle_signal_test);

  fprintf(stdout, "The original SIGINT handler is 0x%x\n", original_handler);
  fprintf(stdout, "handle_siganl() is 0x%x\n", handle_signal);

  global_break_flag = 0;

  for (;;)
  {
    if (global_break_flag > 0)
    {
      fprintf(stdout, "break for loop.\n");
      break;
    }
  }

  return 0;
}

void handle_signal(int s)
{
  global_break_flag++;
  fprintf(stdout, "[%s:%d:%s]Cached %d signal.\n", __FILE__, __LINE__, __func__, s);
}

void handle_signal_test(int s)
{
  global_break_flag++;
  fprintf(stdout, "[%s:%d:%s]Cached %d signal.\n", __FILE__, __LINE__, __func__, s);
}