View Single Post
  #1   (View Single Post)  
Old 13th August 2017
gustaf gustaf is offline
Fdisk Soldier
Join Date: Dec 2016
Posts: 51
Default Visual guide to re_format(7)

Hello everyone!

I've finally gotten around to trying regular expressions.

For years, they seemed like magic incantations, accessible only to the initiated. There were too many incomprehensible details and I could never get them to work. It was easier to avoid them altogether and find a different solution to the problem.

This week, I hit a wall and couldn't avoid them anymore. There simply was no other easy solution. I cracked open the re_format(7) man page and decided to draw what I was reading. A diagram of the first few paragraphs emerged, then some tables that would make it easy for me to locate the RE components and their meanings.

The end result is a visual guide to OpenBSD re_format(7). I have posted this guide as a PDF attachment since I can't find a way to make a table with BBcode.

I think I finally have my facts straight about the OpenBSD implementation of regular expressions. If anyone sees any glaring (or not so glaring) inaccuracies, feel free to let me know.
Attached Files
File Type: pdf OBSD-Regular_Expressions.pdf (85.6 KB, 101 views)

Last edited by gustaf; 20th August 2017 at 03:16 PM. Reason: Changed title from 'Regular expressions in OpenBSD'
Reply With Quote