perl -0777lpwi -030e0 file

    0777    Set $/ to 0777.
    l       Chomp $\ and set $\ = $/. Thus $\ = 0777.
    p       Loop over file and print.
    w       Turn warnings on.
    i       Make the changes in-place.
    030     Set $/ to 030 (^X). $\ is still 0777.
    e0      Empty program.