PIPE(3)PIPE(3)NAMEpipe - 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.