# Pipe data from GRC through shell command (like gr-pipe in 3.6)?

**URL:** <https://www.ruby-forum.com/t/pipe-data-from-grc-through-shell-command-like-gr-pipe-in-3-6/233472>\
**Category:** GNU Radio\
**Created:** [December 16, 2014, 6:15pm UTC](https://www.ruby-forum.com/t/pipe-data-from-grc-through-shell-command-like-gr-pipe-in-3-6/233472 "2014-12-16T18:15:31Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![addis\_a](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/a/c4cdca/32.png) [@addis\_a](https://www.ruby-forum.com/u/addis_a)\
**Post date:** [December 16, 2014, 6:15pm UTC](https://www.ruby-forum.com/t/pipe-data-from-grc-through-shell-command-like-gr-pipe-in-3-6/233472/1 "2014-12-16T18:15:31Z")

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I want to pipe data from GRC “through” a command running in the linux  
shell. I found gr-pipe on github, but it seems to be for 3.6 only. Until  
now I have used file sinks / sources and FIFOs, but this is inconvenient  
as FIFOs have to be created and things have to happen at a specific  
place in the filesystem. I’d rather find a way to directly connect to  
STDIO of a given command.  
thanks Mark

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**Author:** ![M\_Dammer](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/3ab097/32.png) [@M\_Dammer](https://www.ruby-forum.com/u/M_Dammer)\
**Post date:** [December 17, 2014, 1:32am UTC](https://www.ruby-forum.com/t/pipe-data-from-grc-through-shell-command-like-gr-pipe-in-3-6/233472/2 "2014-12-17T01:32:28Z")

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Mark,

The File Descriptor Source/Sink work with stdin/stdout.