This is the mail archive of the cygwin mailing list for the Cygwin project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: cygwin python os.stat gives wrong ctime

On May 28 21:39, Mitch Deoudes wrote:
> According to the python docs, os.stat() gives the following for st_ctime:
>     "|st_ctime| - platform dependent; time of most recent metadata change on
> Unix, or the time of creation on Windows"
> To reproduce:
>     1) touch foo
>     2) wait a minute
>     3) touch foo
>     4) use python's os.stat() on the file foo
> cygwin's python 2.7.10 gives (me) the same number for mtime, ctime, and
> atime:
>     posix.stat_result(st_mode=33276, st_ino=40532396646393057,
> st_dev=1079873317, st_nlink=1, st_uid=1001, st_gid=513, st_size=0,
> st_atime=1464482278, st_mtime=1464482278, st_ctime=1464482278)
> However, cygwin's built-in stat command gives (correctly) the addtional
> "birth time", which is different:
>     Access: 2016-05-28 20:37:58.748977000 -0400
>     Modify: 2016-05-28 20:37:58.748977000 -0400
>     Change: 2016-05-28 20:37:58.748977000 -0400
>     Birth: 2016-05-28 20:36:34.514159100 -0400
> The non-cygwin version of Windows python from (v2.7.11) behaves
> correctly as per spec:
>     nt.stat_result(st_mode=33206, st_ino=0L, st_dev=0L, st_nlink=0,
> st_uid=0, st_gid=0, st_size=0L, st_atime=1464482278L, st_mtime=1464482278L,
> st_ctime=1464482194L)
> Am I missing something, or is this a bug in cygwin's python?  You could
> argue that ctime is properly "change" and not "birth", but that's not what
> the python spec says it should be on Windows.

Cygwin's ctime is Change time, not Birth time, that's why Cygwin's stat
structure comes with an additional st_birthtime as on the BSDs.

I have no idea if python has a compile time option to make st_birthtime
visible, though.


Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

Attachment: signature.asc
Description: PGP signature

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]