Re: On darwin, diff <(echo ab) <(echo cd) does nothing

[John.Cowan]

Vincent Lefevre scripsit:

> Instead of checking the file name (vs /dev/fd/*), one can say that
> if a file is a fifo, then the files are different. Even if two fifos
> were the same file, I think it is a bug not to read them, since this
> is an optimisation that has a side effect.

IMO diff and friends ought not to do this optimization for *anything*
but a plain file or directory.  "diff /dev/tty /dev/tty" currently just
returns 0 without reading anything from the tty, which is Evil and Wrong.
(Solaris diff reads two files from the tty and compares them, as it
should.)

-- 
May the hair on your toes never fall out!       John Cowan
        --Thorin Oakenshield (to Bilbo)         address@hidden