Re: touch

[Eric Blake]

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

According to ctrn3e8 on 12/29/2009 10:38 PM:
> I couldn't find where UTIME_NOW etc. is  defined, so I just pulled the
> values off the internet.

They are defined in <sys/stat.h>.  I keep forgetting that while many
systems implicitly include <sys/stat.h> as part of <fcntl.h> (which POSIX
allows but not requires), newer Linux is striving to be more namespace-clean.

> Output on ext4:

Compliant.

> Output on ntfs-3G

5 out of 9 combinations passed.  The failures:

> 1262151223 1262151223 1262151223                          
>  0 0                                                      
> 1000000000 1000000000 1262151224                          
>  0 1                                                      
> 1000000001 1262151225 1262151225                          
>  0 2                                                      
> 1000000001 1262151225 1262151225                          

valid/UTIME_OMIT fails

>  1 0                                                      
> 1262151227 1000000003 1262151227                          
>  1 1
> 1262151228 1262151228 1262151228
>  1 2
> 1262151228 1262151228 1262151228

UTIME_NOW/UTIME_OMIT fails

>  2 0
> 1262151228 1262151228 1262151228

UTIME_OMIT/valid fails

>  2 1
> 1262151228 1262151228 1262151228

UTIME_OMIT/UTIME_NOW fails

>  2 2
> 1262151228 1262151228 1262151228

So in general, the problem can be characterized precisely by the presence
of UTIME_OMIT, and can be worked around with a mere stat() (no gettime()
is needed, since UTIME_NOW still works).  Do you have a full name that
you'd like to be credited by in THANKS, or do you desire to remain hidden
behind your pseudonym?  Thanks again for helping us track down and work
around this bug.

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

Eric Blake             address@hidden
-----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/

iEYEARECAAYFAks7TKUACgkQ84KuGfSFAYBp+gCglcsgta+AvWnsFftyMo7IrEAm
l1YAoLsMPF3+iEa/dzm957Q+dlFbzSQW
=CHO4
-----END PGP SIGNATURE-----