51 lines
1008 B
C
51 lines
1008 B
C
/**
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* @file main.c
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* @author longjin (longjin@RinGoTek.cn)
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* @brief 测试signal用的程序
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* @version 0.1
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* @date 2022-12-06
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*
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* @copyright Copyright (c) 2022
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*
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*/
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/**
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* 测试signal的kill命令的方法:
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* 1.在DragonOS的控制台输入 exec bin/test_signal.elf &
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* 请注意,一定要输入末尾的 '&',否则进程不会后台运行
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* 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")
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*
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*/
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#include <signal.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <unistd.h>
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bool handle_ok = false;
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int count = 0;
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void handler(int sig) {
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printf("handle %d\n", sig);
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handle_ok = true;
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count++;
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}
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int main() {
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signal(SIGKILL, &handler);
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printf("registered.\n");
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while (1) {
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// handler(SIGKILL);
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printf("Test signal running\n");
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raise(SIGKILL);
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if (handle_ok) {
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printf("Handle OK!\n");
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handle_ok = false;
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}
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if (count > 0) {
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signal(SIGKILL, SIG_DFL);
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}
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}
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return 0;
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} |