pipe man page on Plan9

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PIPE(3)								       PIPE(3)

       pipe - two-way interprocess communication

       bind #| dir


       An  attach(5)  of  this	device	allocates  two new cross-connected I/O
       streams, dir/data and dir/data1.

       Data written to one channel becomes available for reading at the other.
       Write boundaries are preserved: each read terminates when the read buf‐
       fer is full or after reading the last byte of a write, whichever	 comes

       Writes are atomic up to a certain size, typically 32768 bytes, that is,
       each write will be delivered in a single read by	 the  recipient,  pro‐
       vided the receiving buffer is large enough.

       If there are multiple writers, each write is guaranteed to be available
       in a contiguous piece at the other end of the pipe.  If there are  mul‐
       tiple readers, each read will return data from only one write.

       The  pipe(2)  system call performs an attach of this device and returns
       file descriptors to the new pipe's data and data1 files.	 The files are
       open with mode ORDWR.



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