thx sh1tn for your reply, but i think you got me wrong, as my description of the problem was not complete i guess.

the string can either be longer than the format specification, or shorter. if it is shorter, it should be left-justified.
if it is longer, it should get cut as usual, but the string's end should be the output, rather than the the string's beginning. so just what the "..."-format specifier does.
your printf-example does not do that :(