Cygwin DLL 3.2.0 (W10) Problem with touch (8.26) for old dates < 1970

Thomas Wolff towo@towo.net
Wed Apr 14 11:16:08 GMT 2021


Am 14.04.2021 um 12:36 schrieb akiki--- via Cygwin:
> Hi,
> I encountered problems with the use of timestamps in cygwin.
> May be it's an old problem, I don't know, using essentially files "recently" created/modified.
>
>
> I want to say after 1970 No problem, but before ...
The namespace of Unix/POSIX timestamps starts in 1970. Time before that 
year does not exist.

> To day:
> touch -m -t 190001011200.00 x gives touch: format de date « 190001011200.00 » incorrect
> touch -m -t 190101011200.00 x gives ok - with ls -l x:
> -rw-r--r-- 1 user group 0 1 janv. 1910 x
>
>
> touch used is well /bin/touch
>
>
> By comparison on Ubuntu 18 LTS
> touch -m -t 190001011200.00 x is correct
>
>
> I know, timestamps are managed differently in windows and linux.
>
>
> I see also with the new windows terminal with ubuntu
> On windows file, like /mnt/c/x (windows is mounted by linux)
> touch -m -t 190001011200.00 x ; echo $? gives
> 0 #No error but timestamp is set to 1970-01-01
> On linux file as ~/x, it's correct;
>
>
> So, which confidence to have with cygwin about files of timestamp 19xx before 1970.
> May be it's ok after 1901. The answer is NOT.
> touch -m -t 190101011200.00 x gives sometimes format de date incorrect
>
>
> In some windows directories and more problematic, for a same directory, I don't understand why.
> May be due to embedded mounts.
>
>
> I hope to have been clear enough.
>
>
>
> Thanks for answers.
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