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A Unix pipe connects file descriptors of two processes. A pipe is created with the POSIX pipe() function declared in <unistd.h>. Shells provide pipe creation between processes using "|".

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The Pipe Viewer utility was designed for this purpose. If it's not flexible enough for your purposes, then you can implement your own FIFO data transfer measuring code with the pipeline manipulation … library (libpipeline) function calls such as pipeline_pump() and pipeline_peek_size(). $ whatis pv pv (1) - monitor the progress of data through a pipe $ pv -Wi 0.002 -cf /etc/hosts …
answered Feb 26 '18 by Derek Callaway