Bjartur Thorlacius wrote: > On 2/24/11, Jim Meyering <[email protected]> wrote: >> Bjartur Thorlacius wrote: >>>> Maybe we should modify tac to add the -z option. Would you care to >>> write a patch? >>> It would be redundant, as tac -s $'\0' is equivalent. >> >> Are you using a non-GNU version of tac? > I don't remember whether I was using FreeBSD or GNU tac.
Please confirm. I may make a difference. >> If so, please tell us which one -- that may influence >> the decision of whether to make "-s ''" work or to add -z. >> >> With GNU tac, that has never worked: >> >> $ tac -s '' >> tac: separator cannot be empty >> > NUL!=the empty string. tac treats them the same way. >> Making -s accommodate an empty string argument is a possibility, >> but that change looks like it'd be relatively disruptive. >> > I don't understand what that would do. Self-delimited strings would be > quite disruptive, indeed, but I gather that's not what you're talking > about. Changing tac.c to make -s accommodate an empty string looks like it would require changes that are too invasive.
