Does grep -rIL display the binary files from a directory and it's subdirectories?

Question

I tried to display with grep -rIL the binary files from a directory (subdirectories included) but after I tried it I'm not sure if the output is right. Could someone please tell me if grep -rIL outputs binary files or is there a better way to display binary files with grep?

Answer 1

Man page says:

-I Process a binary file as if it did not contain matching data; this is equivalent to the --binary-files=without-match option.

That's what it looks like to do, too:

$ printf 'foo\0bar\0' > binary.txt
$ echo hi > hello.txt
$ grep -rIL -e foo .
./hello.txt
./binary.txt
$ grep -rL -e foo .
./hello.txt
$

With -I the binary is listed, like the non-matching non-binary file; without it, it's not.