On Thu 27 May 2010, martin f krafft wrote:
>
> It should be possible to use the value of
> pathconf("path/to/destination", _POSIX_TIMESTAMP_RESOLUTION) to
> determine the minimum timestamp resolution and to set
> --modify-window accordingly by default.
>
> http://www.opengroup.org/onlinepubs/9699919799/functions/fpathconf.html
>
> Unfortunately, this does not seem to exist in Debian. :(
>
> Maybe in the mean time, rsync chould use statfs(3)'s f_fsid field
> and set --modify-window to a default of 2 for FAT/VFAT destinations?
> I realise this is a hack, but it'd be useful until
> _POSIX_TIMESTAMP_RESOLUTION became available.
The biggest problem with both solutions is that you would have to check
the filesystem / _POSIX_TIMESTAMP_RESOLUTION thing for every directory
you traverse, as there may be FAT filesystems on subdirectories or bind
mounts etc.; this may cause a hefty overhead.
Paul
