[LIP] Re: linux-india-programmers digest, Vol 1 #1014 - 2 msgs

> Hi all.
> I'd be grateful if somebody solved this confusion I
> have about IPC using half-duplex pipes.Read on for
> where I am getting stuck.
> 
> A parent forks a child after creating a pipe using the
> pipe function.
> In the situation where child wants to read and parent
> wants to write to 
> the pipe, the child closes the fd[1] file descriptor
> and parent closes the fd[0] file descriptor, since
> these are not needed by them.What I 
> want to know is that, since the parent and child are
> working on the same address space, should'nt the
> closing of both of those file 
> descriptors( though in separate processes..) close the
> pipe.Leaving no file descriptor for reading and
> writing open.
> 
> I know I am wrong here coz this is not what happens, I
> am counting on some of you to correct me and explain
> what really goes on here.
Fork will also duplicate the file desc. If u close a file desc. in one process, it will not be closed for other process.   
> 
> Thanks.
> Shehjar
> 
> 
> 

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