You can use another tool instead: awk '/ $/ ' filename thenĮcho filename has Unix-style line endingsĮcho filename has at least one Windows-style line endingĪ file can contain a mixture of Unix-style and Windows-style line endings.

Other shells may provide a similar feature. The bash shell lets you write a literal carriage return as $' ' ( documented here), so you can write: grep -l $' $' filename

Except that the ^M has to be a literal carriage return character, typically entered in the terminal by typing Ctrl+ V followed by Enter Will print filename if the file contains one or more lines with Windows-style line endings, and will print nothing if it doesn't. If a file has DOS/Windows-style CR-LF line endings, then if you look at it using a Unix-based tool you'll see CR (' ') characters at the end of each line. See Bash script: check if a file is a text file.īeware that checking the output from file Without this, a file whose name included the characters CRLF

file -b outputs only the file type, and not the file name.

Second method ( file): ] & echo dosīecause file reports something like: myfile.txt: UTF-8 Unicode text, with CRLF line terminators Grep $' ' looks for lines containing or a null string, Just as grep -E 'foo|' looks for lines containing foo or a null string, Specifying -U (or -binary) overrules this guesswork,Ĭausing grep to treat the file(s) as binaryĪnd pass the data to the matching mechanism verbatim, with CR-endings intact.īecause grep treats as a pattern delimiter. In an attempt to make $ in regular expressions work 'correctly'. If it thinks the file is text, it ignores carriage returns at the ends of lines,

Throughout the above, you may need to add the -U optionīecause GNU grep guesses whether the file is a text file.

While grep -q can exit upon seeing the first occurrence of the pattern. To count all the occurrences of the pattern,

because grep -c needs to read the entire file,.

because it doesn't need to convert the count to an ASCII string,Īnd then convert that string back to an integer, and compare it to zero, and.

More efficient: grep -q $' ' myfile.txt & echo dos Count the lines that contain a carriage return: ] & echo dosĬount the lines that end with a carriage return: ] & echo dosĪ carriage return in the interior of a line (i.e., not at the end) is rare.

Mac text file line coun