I think for grep in emacs, the only thing require is the interface: - result on standard output - path and line numbers on each line A lot of emacs reliance o

I think for grep in emacs, the only thing require is the interface: - result on standard output - path and line numbers on each line A lot of emacs reliance on other tools follow the same pattern. While the default is posix, it has enough options to twist it to fit whatever OS.