How to determine the line ending of a file
Solution 1:
You can use the file tool, which will tell you the type of line ending. Or, you could just use dos2unix -U which will convert everything to Unix line endings, regardless of what it started with.
Solution 2:
You could use grep
egrep -l $'\r'\$ *
Solution 3:
Something along the lines of:
perl -p -e 's[\r\n][WIN\n]; s[(?<!WIN)\n][UNIX\n]; s[\r][MAC\n];' FILENAME
though some of that regexp may need refining and tidying up.
That'll output your file with WIN, MAC, or UNIX at the end of each line. Good if your file is somehow a dreadful mess (or a diff) and has mixed endings.
Solution 4:
Here's the most failsafe answer. Stimms answer doesn account for subdirectories and binary files
find . -type f -exec file {} \; | grep "CRLF" | awk -F ':' '{ print $1 }'
- Use
fileto find file type. Those with CRLF have windows return characters. The output offileis delimited by a:, and the first field is the path of the file.
Solution 5:
Unix uses one byte, 0x0A (LineFeed), while windows uses two bytes, 0x0D 0x0A (Carriage Return, Line feed).
If you never see a 0x0D, then it's very likely Unix. If you see 0x0D 0x0A pairs then it's very likely MSDOS.