Re: Cygwin /usr/bin/stat returns "Birth: -", which value in FILE_BASIC_INFORMATION.CreationTime causes that?

2024-04-05 Thread Brian Inglis via Cygwin

On 2024-04-04 19:08, Martin Wege via Cygwin wrote:

On Fri, Apr 5, 2024 at 2:55 AM Brian Inglis via Cygwin
 wrote:


On 2024-04-04 18:05, Martin Wege via Cygwin wrote:

I have problems with debugging, so a quick help would be appreciated,
as I cannot figure this out after several hours of digging.

Cygwin /usr/bin/stat returns "Birth: -" for some files. Which value
must the CreationTime member of FILE_BASIC_INFORMATION have to cause
/usr/bin/stat ti return "-"? 0, -1, or something else?


https://git.savannah.gnu.org/cgit/coreutils.git/tree/src/stat.c#n1618

=> tv_nsec < 0

https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler/disk_file.cc#l414

https://cygwin.com/git/?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/times.cc#l283


Thank you

But how can tv_nsec become negative (tv_nsec < 0)? That can only
happen if BasicInformation.CreationTime.QuadPart is negative, right?


Caller or application can set 0 to mean keep/return current value, caller or 
driver can set -1 to mean don't update/return current value:


https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/ns-wdm-_file_basic_information#remarks

--
Take care. Thanks, Brian Inglis  Calgary, Alberta, Canada

La perfection est atteinte   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry

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Re: Cygwin /usr/bin/stat returns "Birth: -", which value in FILE_BASIC_INFORMATION.CreationTime causes that?

2024-04-04 Thread Martin Wege via Cygwin
On Fri, Apr 5, 2024 at 2:55 AM Brian Inglis via Cygwin
 wrote:
>
> On 2024-04-04 18:05, Martin Wege via Cygwin wrote:
> > I have problems with debugging, so a quick help would be appreciated,
> > as I cannot figure this out after several hours of digging.
> >
> > Cygwin /usr/bin/stat returns "Birth: -" for some files. Which value
> > must the CreationTime member of FILE_BASIC_INFORMATION have to cause
> > /usr/bin/stat ti return "-"? 0, -1, or something else?
>
> https://git.savannah.gnu.org/cgit/coreutils.git/tree/src/stat.c#n1618
>
> => tv_nsec < 0
>
> https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler/disk_file.cc#l414
>
> https://cygwin.com/git/?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/times.cc#l283

Thank you

But how can tv_nsec become negative (tv_nsec < 0)? That can only
happen if BasicInformation.CreationTime.QuadPart is negative, right?

Thanks,
Martin

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Re: Cygwin /usr/bin/stat returns "Birth: -", which value in FILE_BASIC_INFORMATION.CreationTime causes that?

2024-04-04 Thread Brian Inglis via Cygwin

On 2024-04-04 18:05, Martin Wege via Cygwin wrote:

I have problems with debugging, so a quick help would be appreciated,
as I cannot figure this out after several hours of digging.

Cygwin /usr/bin/stat returns "Birth: -" for some files. Which value
must the CreationTime member of FILE_BASIC_INFORMATION have to cause
/usr/bin/stat ti return "-"? 0, -1, or something else?


https://git.savannah.gnu.org/cgit/coreutils.git/tree/src/stat.c#n1618

=> tv_nsec < 0

https://cygwin.com/git?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/fhandler/disk_file.cc#l414

https://cygwin.com/git/?p=newlib-cygwin.git;a=blob;f=winsup/cygwin/times.cc#l283

--
Take care. Thanks, Brian Inglis  Calgary, Alberta, Canada

La perfection est atteinte   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer but when there is no more to cut
-- Antoine de Saint-Exupéry

--
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Cygwin /usr/bin/stat returns "Birth: -", which value in FILE_BASIC_INFORMATION.CreationTime causes that?

2024-04-04 Thread Martin Wege via Cygwin
Hello,

I have problems with debugging, so a quick help would be appreciated,
as I cannot figure this out after several hours of digging.

Cygwin /usr/bin/stat returns "Birth: -" for some files. Which value
must the CreationTime member of FILE_BASIC_INFORMATION have to cause
/usr/bin/stat ti return "-"? 0, -1, or something else?

Thanks,
Martin

-- 
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