Re: [fuse-devel] utimensat fails to update ctime

Eric Blake
2009-12-23T12:52:55Z

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

According to OGAWA Hirofumi on 12/22/2009 10:58 AM:
>> I suggest I port Miklos patch to fuse-lite soon,
>> and delay the low-level case (and microsecond
>> precision) until January. Does that suit your needs ?
>
> Thanks. Sounds good. I'm not using ntfs-3g actually, I just bridged the
> bug report on lkml to others. Eric?

I'm also bridging the report from a coreutils user (now cc'd). Since I
also don't use ntfs-3g, I'm hoping that ctrn3e8 will be able to help test
whether the latest patch to ntfs-3g makes a difference in properly setting
times. To me, delaying precision while fixing UTIME_OMIT semantics is a
reasonable approach.

By the way, is there any reliable way, other than uname() and checking for
a minimum kernel version, to tell if all file systems will properly
support UTIME_OMIT? For coreutils 8.3, we will be inserting a workaround
where instead of using UTIME_OMIT, we call fstatat() in advance of
utimensat() and pass the original timestamp down. But it would be nice to
avoid the penalty of the extra stat if there were a reliable way to ensure
that, regardless of file system, the use of UTIME_OMIT will be honored.
After all, coreutils wants touch(1) to work regardless of how old the
user's kernel and file system drivers are.

- --
Don't work too hard, make some time for fun as well!

Eric Blake ebb9@byu.net
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.9 (Cygwin)
Comment: Public key at home.comcast.net/~ericblake/eblake.gpg
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/

iEYEARECAAYFAksyEu0ACgkQ84KuGfSFAYCrzACgirIjqmS7vFOBcI8xau6jHEa0
4L0AnAjJkje+tSMF/FZkTbkohg/fhQ+i
=ngx0
-----END PGP SIGNATURE-----