1 /** 2 * @file main.c 3 * @author longjin (longjin@RinGoTek.cn) 4 * @brief 测试signal用的程序 5 * @version 0.1 6 * @date 2022-12-06 7 * 8 * @copyright Copyright (c) 2022 9 * 10 */ 11 12 /** 13 * 测试signal的kill命令的方法: 14 * 1.在DragonOS的控制台输入 exec bin/test_signal.elf & 15 * 请注意,一定要输入末尾的 '&',否则进程不会后台运行 16 * 2.然后kill对应的进程的pid (上一条命令执行后,将会输出这样一行:"[1] 生成的pid") 17 * 18 */ 19 20 #include <signal.h> 21 #include <stdbool.h> 22 #include <stdio.h> 23 #include <unistd.h> 24 25 bool handle_ok = false; 26 int count = 0; 27 void handler(int sig) 28 { 29 printf("handle %d\n", sig); 30 handle_ok = true; 31 count++; 32 } 33 34 int main() 35 { 36 signal(SIGKILL, &handler); 37 printf("registered.\n"); 38 39 while (1) 40 { 41 // handler(SIGKILL); 42 printf("Test signal running\n"); 43 raise(SIGKILL); 44 if (handle_ok) 45 { 46 printf("Handle OK!\n"); 47 handle_ok = false; 48 } 49 if (count > 0) 50 { 51 signal(SIGKILL, SIG_DFL); 52 } 53 } 54 55 return 0; 56 }