實現過程:
- 使用系統調用fork創建兩個子進程
- 用系統調用signal()讓父進程捕捉鍵盤上的中斷信號(Ctrl+C或者Ctrl + )
- 捕捉到中斷信號後,父進程調用系統調用Kill殺死兩個子進程
#include<unistd.h>
#include<string.h>
#include<stdlib.h>
#include<stdio.h>
#include<signal.h>
#include<sys/types.h>
#include<sys/wait.h>
pid_t pid1,pid2;
void CallKill(int a)
{
kill(pid1,20);
kill(pid2,21);
}
void Child_1()
{
printf("Child Process1 is Killed by Parent!\r\n");
exit(0);
}
void Child_2()
{
printf("Child Process2 is Killed by Parent!\r\n");
exit(0);
}
int main()
{
pid1 = fork();
if(pid1 == 0)
{
//signal(SIGINT,SIG_IGN);//忽略收到的中斷指令
signal(SIGQUIT,SIG_IGN);
signal(20,Child_1);//註冊中斷信號對應的函數指針
sleep(5);//切換進程
}
else
{
pid2 = fork();
if(pid2 == 0)
{
//signal(SIGINT,SIG_IGN);
signal(SIGQUIT,SIG_IGN);
signal(21,Child_2);//註冊中斷信號對應的函數指針
sleep(5);
}
else
{
//signal(SIGINT,CallKill);
signal(SIGQUIT,CallKill);
sleep(10);//切換到子進程去執行
wait(0);//等待子進程全部推出
wait(0);
printf("Parent Process is Killed\r\n");
exit(0);
}
}
return 0;
}
初接觸linux的實驗記錄