How do you search for files containing DOS line endings (CRLF) with grep on Linux?

Question

I want to search for files containing DOS line endings with grep on Linux. Something like this:

grep -IUr --color \'\\         


        

Answer 1

The query was search... I have a similar issue... somebody submitted mixed line endings into the version control, so now we have a bunch of files with 0x0d 0x0d 0x0a line endings. Note that

grep -P '\x0d\x0a'

finds all lines, whereas

grep -P '\x0d\x0d\x0a'

and

grep -P '\x0d\x0d'

finds no lines so there may be something "else" going on inside grep when it comes to line ending patterns... unfortunately for me!

Answer 2

If your version of grep supports -P (--perl-regexp) option, then

grep -lUP '\r$'

could be used.

Answer 3

dos2unix has a file information option which can be used to show the files that would be converted:

dos2unix -ic /path/to/file

To do that recursively you can use bash’s globstar option, which for the current shell is enabled with shopt -s globstar:

dos2unix -ic **      # all files recursively
dos2unix -ic **/file # files called “file” recursively

Alternatively you can use find for that:

find -exec dos2unix -ic {} +            # all files recursively
find -name file -exec dos2unix -ic {} + # files called “file” recursively