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void sig_chld(int sig){???pid_t pid;???int stat;???while(1)???{???? pid = waitpid(-1,&stat, WNOHANG);//WNOHANG 非阻塞方式???? if(pid == 0 ||(pid ==-1 &&errno!= EINTR))???? {???????? break;???? }???}??????return;}
void sig_chld(int sig){???pid_t pid;???int stat;???while(1)???{???? pid = waitpid(-1,&stat, WNOHANG);//
方式???? if(pid == 0 ||(pid ==-1 &&errno!= EINTR))???? {???????? break;???? }???}??????return;}
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