How do you grep results from 'find'?

Question

Trying to find a word/pattern contained within the resulting file names of the find command.

For instance, I have this command:

find . -name Gruntfile

Answer 1

When too many files exist for the * expansion to run:

$ grep -o 'xxmaj\|xxbos\|xxfld' train/* | wc -l
-bash: /bin/grep: Argument list too long
0

Then this code fixes the “too long” problem:

$ find junk -maxdepth 1 -type f | xargs grep -o 'TVDetails\|xxmaj\|xxbos\|xxfld' 
junk/gum-.doc.out:TVDetails
junk/Zv0n.doc.out:TVDetails
$ find junk -maxdepth 1 -type f | xargs grep -o 'TVDetails\|xxmaj\|xxbos\|xxfld' | wc -l
2

It runs faster on my system, and maybe yours, when using the -P 0 option:

$ /usr/bin/time -f "%E Elapsed Real Time" find train -maxdepth 1 -type f | xargs -P 0 grep -o 'TVDetails\|xxmaj\|xxbos\|xxfld' | wc -l
0:02.45 Elapsed Real Time
358
$ /usr/bin/time -f "%E Elapsed Real Time" find train -maxdepth 1 -type f | xargs grep -o 'TVDetails\|xxmaj\|xxbos\|xxfld' | wc -l
0:11.96 Elapsed Real Time
358

Hope this helps.