find print only uppercase words from a file

Posted on 2007-04-06
Medium Priority
Last Modified: 2008-01-09
I need a script  that will extract from a file only those words in uppercase, and print only the uppercase words
example: print only those words from a Makefile that are all in uppercase
reason for script: uppercase words are typically macros in a Makefile. I wrote a one liner that will expand the macro, but am having difficulty just extracting the macros from the Makefile.

I will be using this in a Linux/Unix environment

Question by:laughtrax4

Assisted Solution

DocGyver earned 664 total points
ID: 18866585
well the following egrep will get all lines that have "words" of at least 2 all uppercase characters

egrep  '\W[A-Z]{2,}\W|^[A-Z]{2,}\W|\W[A-Z]{2,}$'

once you have that it should be a fairly simple 'sed' command to give you only the matching part.  Can you handle the sed?

LVL 15

Accepted Solution

veedar earned 672 total points
ID: 18869454
This deletes all lower case, punctuation and digits....leaving just uppercase...

cat file | tr -d [:lower:][:punct:][:digit:]

LVL 48

Assisted Solution

Tintin earned 664 total points
ID: 18879221
grep -o -w '[A-Z]*' /some/file

Featured Post

Upgrade your Question Security!

Your question, your audience. Choose who sees your identity—and your question—with question security.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

I. Introduction There's an interesting discussion going on now in an Experts Exchange Group — Attachments with no extension . This reminded me of questions that come up here at EE along the lines of, "How can I tell the type of file from its cont…
This installment of Make It Better gives Media Temple customers the latest news, plugins, and tutorials to make their Grid shared hosting experience that much smoother.
Learn how to navigate the file tree with the shell. Use pwd to print the current working directory: Use ls to list a directory's contents: Use cd to change to a new directory: Use wildcards instead of typing out long directory names: Use ../ to move…
Connecting to an Amazon Linux EC2 Instance from Windows Using PuTTY.
Suggested Courses

627 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question