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Date:	Mon, 12 May 2014 18:51:33 +0200
Subject:	Re: Baffled: is it Cygwin (64-bits) or Windows that causes the invocation of regedit (from bash) to fail?
From:	"Houder" <houder AT xs4all DOT nl>
To:	cygwin AT cygwin DOT com
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Hi Andrey,

>> Another issue you might run into ...
>
>> I was surprised to find, that 32-bits bash reported /drv/c/Windows/regedit.exe as a different file,
>> compared to what 64-bits bash reported.
>
> No surprise here. To reach 64-bit regedit (and other utilities) from 32-bit
> application, you have to address it through %SystemRoot%\Sysnative path.

Hold on. I wrote '/drv/c/Windows/regedit.exe' (irrespective of its bit-ness).

BUT! See bottom of this message.

>
>> Note: 32-bits cmd and 64-bits cmd report c:/Windows/regedit.exe as the SAME
>> file. Which, of course, made me wonder ...
>
> I wonder, how do you check that?

C:\Users\Henri> dir /tc /4 c:\Windows\regedit.exe   # using 32-bits cmd
 Volume in drive C has no label.
 Volume Serial Number is 12F0-A5C0

 Directory of c:\Windows

14-07-2009  01:27           427.008 regedit.exe

C:\Users\Henri> dir /tc /4 c:\Windows\regedit.exe   # using 64-bits cmd
 Volume in drive C has no label.
 Volume Serial Number is 12F0-A5C0

 Directory of c:\Windows

14-07-2009  01:27           427.008 regedit.exe

Size and date/time of creation are the same.

>> Searching the internet again, I got the understanding, that there has been
>> been a time in which a request for c:/Windows/regedit.exe was redirected to
>> c:/Windows/SysWOW64/regedit.exe (in case of a 32-bits application).
>
>> As far as I can tell, this redirection no longer applies (meaning, as far as
>> can tell, MS changed its mind here).
>
> How did you found that?

For instance, here
    http://msdn.microsoft.com/en-us/library/windows/desktop/aa384187%28v=vs.85%29.aspx

it said
    Access to %windir%\regedit.exe is redirected to %windir%\SysWOW64\regedit.exe (in case of
    32-bits application)

The current situation on my W7 does NOT agree with the above statement.

Henri

-----
Here it shows that 32-bits Cygwin "sees" (i.c. ls, stat) a different file at /drv/c/Windows ...

Using my 32-bits Cygwin installation (DOS-box, bash) at e:/Cygwin

@@ ls -l /drv/c/Windows/regedit
-rwxrwx---+ 2 TrustedInstaller TrustedInstaller 398336 Jul 14  2009 /drv/c/Windows/regedit
@@ stat /drv/c/Windows/regedit
  File: `/drv/c/Windows/regedit'
  Size: 398336          Blocks: 392        IO Block: 65536  regular file
Device: 12f0a5c0h/317760960d    Inode: 281474976748756  Links: 2
Access: (0770/-rwxrwx---)  Uid: (4294967294/TrustedInstaller)   Gid: (4294967294/TrustedInstaller)
Access: 2009-07-14 01:17:08.803392200 +0200
Modify: 2009-07-14 03:14:30.457000000 +0200
Change: 2014-05-11 18:34:40.326326000 +0200
 Birth: 2009-07-14 01:17:08.803392200 +0200

Using my 64-bits Cygwin installation (DOS-box, bash) at e:/Cygwin64:

64-@@ ls -l /drv/c/Windows/regedit
-rwxrwx---+ 2 TrustedInstaller TrustedInstaller 427008 Jul 14  2009 /drv/c/Windows/regedit
64-@@ stat /drv/c/Windows/regedit
  File: `/drv/c/Windows/regedit'
  Size: 427008          Blocks: 420        IO Block: 65536  regular file
Device: 12f0a5c0h/317760960d    Inode: 281474976726615  Links: 2
Access: (0770/-rwxrwx---)  Uid: (4294967294/TrustedInstaller)   Gid: (4294967294/TrustedInstaller)
Access: 2009-07-14 01:27:10.125698800 +0200
Modify: 2009-07-14 03:39:29.639000000 +0200
Change: 2014-05-11 18:35:26.892407800 +0200
 Birth: 2009-07-14 01:27:10.125698800 +0200

Note:
 - 32-bits Cygwin invokes 64-bits regedit in case of /drv/c/Windows/regedit
   (yes, different from the one it "sees" (i.c. ls, stat) !!!!!
 - 32-bits Cygwin invokes 32-bits regedit in case of /drv/c/Windows/SysWOW64/regedit
 - in case of /drv/c/Windows/System32/regedit: dito
 - /drv/c/Windows/SysNative/regedit: does NOT exist!
   (the 64-bits version only lives in c:/Windows)

=====


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