On a Windows 7 machine with NTFS, modification time was successfully updated using:

Cygwin

$ ls -goc dummy.txt; perl -e 'utime undef, undef, "dummy.txt"'; ls -go
+c dummy.txt
-rw-r--r--+ 1 0 2011-01-05 08:44 dummy.txt
-rw-r--r--+ 1 0 2011-01-05 08:49 dummy.txt

[download]

and ActiveState perl:

>dir dummy.txt
05/01/2011  08:49                 0 dummy.txt
               
>perl -e "utime undef, undef, 'dummy.txt'"

>dir dummy.txt
 
05/01/2011  08:53                 0 dummy.txt

[download]

I think the file system format (NTFS here) may be significant - also make sure you have write permission on the files you are updating.

In reply to Re: file timestamp and Windows 7 by mjscott2702
in thread file timestamp and Windows 7 by momo33

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