Re: printf(1), sh(1), POSIX.2 and octal escape sequences

[RVP <rvp%SDF.ORG@localhost>]

On Wed, 28 Jun 2023, tlaronde%polynum.com@localhost wrote:

> But isn't it incorrect? POSIX 2018 says:
>
> '"\ddd", where ddd is a one, two, or three-digit octal number, shall be
> written as a byte with the numeric value specified by the octal number.'
>
> since 477 -> 777 are not byte values, shouldn't \777 be interpreted as
> '\77' octal then the digit 7; \677 -> \67 octal then 7 etc. ?

Better to do what the C compiler does: try converting up to 3 digits, and
if the result of the conversion is > 255, complain.

-RVP