> `cksum -a crc32` could be added I suppose to select the current implementation in gnulib
both versions are CRC32 though, and then if you look at the iSCSI/SCTP version they use CRC32-C which uses a totally different polynomial, not just a reversed order one like gzip > I'd be especially reluctant to add the existing cksum crc variant to gnulib, > since I don't see anything but cksum itself using that. I need to research a little further, but bzip2 uses the same implementation as cksum afaik On Thu, 31 Oct 2024 at 18:33, Pádraig Brady <p...@draigbrady.com> wrote: > On 31/10/2024 16:46, Sam Russell wrote: > > I can extend coreutils cksum if you like, what are your thoughts on > adding some parameters to the commandline? Even if it's just an extra flag > for --rfc1952 or --gzip to change all the parameters just between these two > variants? > > Well cksum already has the -a option to select between algorithms. > `cksum -a crc` currrently select cksums POSIX crc > (which also munges in the data length to the crc calculation). > `cksum -a crc32` could be added I suppose to select the current > implementation in gnulib > (and not munge in the length). I can add that easily, > and it probably makes sense to make this more common crc available > (FreeBSD's cksum does for example). > > I'd be reluctant to complicate the gnulib implementations with variants > unless needed. > I'd be especially reluctant to add the existing cksum crc variant to > gnulib, > since I don't see anything but cksum itself using that. > > cheers, > Pádraig >
