当一个进程调用f o r k时,其子进程继承父进程的信号处理方式。因为子进程在开始时复制
了父进程存储图像,所以信号捕捉函数的地址在子进程中是有意义的;
using namespace std;
void sig_handle(int signo){
cout << "---------------------------"<< endl;
cout << getpid() << ":" <<signo;
}
int main(int args,char *argc[]){
signal(SIGUSR1,sig_handle);
pid_t pid;
pid=fork();
if(pid==0){
cout << "son self pid:"<< getpid()<< endl;
pause();
cout << "continue" << endl;
}else{
cout << "son process:"<< pid << endl;
cout << "father process:" << getpid()<<endl;
kill(pid,SIGUSR1);
while(true){
;
}
}
}
打印----------------------------------