The other day I was working on a Kakoune plugin that tried to do something clever with shell pipelines and FIFO buffers, but it just silently hung and I couldn’t figure out why. I suspected I’d somehow set up the pipeline incorrectly, but I didn’t have a way to inspect it and see what I got wrong.
So I threw together a hacky Python script to scrape the Linux
/proc directory for processes and their open file descriptors, pick out a process of interest, and map out the pipeline it’s part of. Now I can run a command like:
$ (cat | tr a-z A-Z | sort) 2>/dev/null
…and automatically generate a map of the pipeline like:
I don’t know if this might be useful to anybody else, or even if I’ll ever use it again myself, but I figured I’d toss it into a git repo just in case: