写一个EOF到管道

Question

我有一个父母和一个孩子prozess，并希望通过管道从父母写一个EOF到孩子......这是如何工作的？

这里是我的attampt：

---父代码---

if(dup2(parent_pipe[1], STDOUT_FILENO) == -1) { /*stdout gets closed and parent_pipe is duplicated with id of stdout*/ 
     error("Can't duplicate the write-end of the pipe to stdout!"); 
} 
if(close(parent_pipe[0]) == -1) { 
    error("Can't close read-end of the pipe!"); 
} 

char blub[] = "EOF"; 
if(write(parent_pipe[1], blub, strlen(blub)) == -1) { 
error("Failed to write the array"); 
} 

---孩子码---

if(dup2(parent_pipe[0], STDIN_FILENO) == -1) { /*stdin gets closed and parent_pipe is duplicated with id of stin*/ 
    error("Can't duplicate the read-end of the pipe to stdin!"); 
} 
/* close the write-end of the pipe */ 
if(close(parent_pipe[1]) == -1) { 
    error("Can't close write-end of the pipe"); 
} 

while(fgets(readbuffer, ROWLENGTH, stdin) != NULL) { 
    printf("Received string: %s", readbuffer, nbytes); 
} 

孩子等待和EOF不停止，我该如何解决这个问题？ 由于事先

Answer 1

当你想停止通信，则必须在父进程关闭管道：

dup2(...); 
... 
write to child 
... 
close(parent_pipe[1]);