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? 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 Making -s accommodate an empty string argument is a possibility, but that change looks like it'd be relatively disruptive. Unless there is already an implementation for which -s '' works, I like the idea of adding -z.