* can't access /cygdrive/c/Windows/Sysnative ?
@ 2016-12-21 17:09 Lester Ingber
2016-12-21 18:12 ` Brian Inglis
0 siblings, 1 reply; 7+ messages in thread
From: Lester Ingber @ 2016-12-21 17:09 UTC (permalink / raw)
To: cygwin
In some older cygwin posts, I see cygwin use of Sysnative for 64-bit
access to System32 files. In my Cygwin64 installation on my Thinkpad
Windows 10 x64 Pro PC I cannot see Sysnative at all under cygwin.
However, for example, using windows opened by Malwarebytes I can access
this directory just fine.
How can I see/access Sysnative under cygwin?
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* Re: can't access /cygdrive/c/Windows/Sysnative ?
2016-12-21 17:09 can't access /cygdrive/c/Windows/Sysnative ? Lester Ingber
@ 2016-12-21 18:12 ` Brian Inglis
2016-12-21 20:16 ` Lester Ingber
0 siblings, 1 reply; 7+ messages in thread
From: Brian Inglis @ 2016-12-21 18:12 UTC (permalink / raw)
To: cygwin
On 2016-12-21 10:09, Lester Ingber wrote:
> In some older cygwin posts, I see cygwin use of Sysnative for 64-bit
> access to System32 files. In my Cygwin64 installation on my Thinkpad
> Windows 10 x64 Pro PC I cannot see Sysnative at all under cygwin.
> However, for example, using windows opened by Malwarebytes I can
> access this directory just fine.
> How can I see/access Sysnative under cygwin?
Run Cygwin 32 - there only used to be 32 bit Cygwin and old posts
assume that environment.
Native 64 bit directories are:
C:\Windows\System32 (64 bit) C:\Windows\SysWOW64 (32 bit)
under 32 bit redirection these become:
C:\Windows\SysNative (64 bit) C:\Windows\System32 (32 bit)
to support poorly written programs that don't use the proper API call
to get the directory name; see:
https://msdn.microsoft.com/en-us/library/windows/desktop/aa384187(v=vs.85).aspx
for full list of paths redirected from 32 bit code on a 64 bit system.
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Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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* Re: can't access /cygdrive/c/Windows/Sysnative ?
2016-12-21 18:12 ` Brian Inglis
@ 2016-12-21 20:16 ` Lester Ingber
2016-12-22 1:07 ` Mark Geisert
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Lester Ingber @ 2016-12-21 20:16 UTC (permalink / raw)
To: cygwin
So, I guess that I should have seen that the Windows 10 Ubuntu bash.exe
is actually written as a 32 bit code (they didn't use the 64-bit code
as on my other true Ubuntu x64 platform?) from the PE32+ info?:
12:08:44pm ingber@lesterX1:/cygdrive/c/Windows/System32# ls -l bash.exe
-rwxr-x---+ 2 TrustedInstaller TrustedInstaller 70656 Oct 14 20:57
bash.exe
12:08:48pm ingber@lesterX1:/cygdrive/c/Windows/System32# file bash.exe
bash.exe: PE32+ executable (console) x86-64, for MS Windows
Thanks.
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* Re: can't access /cygdrive/c/Windows/Sysnative ?
2016-12-21 20:16 ` Lester Ingber
@ 2016-12-22 1:07 ` Mark Geisert
2016-12-22 12:51 ` Andrey Repin
2016-12-22 18:39 ` Brian Inglis
2 siblings, 0 replies; 7+ messages in thread
From: Mark Geisert @ 2016-12-22 1:07 UTC (permalink / raw)
To: cygwin
Lester Ingber wrote:
> So, I guess that I should have seen that the Windows 10 Ubuntu bash.exe
> is actually written as a 32 bit code (they didn't use the 64-bit code
> as on my other true Ubuntu x64 platform?) from the PE32+ info?:
>
> 12:08:44pm ingber@lesterX1:/cygdrive/c/Windows/System32# ls -l bash.exe
> -rwxr-x---+ 2 TrustedInstaller TrustedInstaller 70656 Oct 14 20:57
> bash.exe
> 12:08:48pm ingber@lesterX1:/cygdrive/c/Windows/System32# file bash.exe
> bash.exe: PE32+ executable (console) x86-64, for MS Windows
No, that last line is saying x86-64 code (i.e. 64-bit) using PE32+ executable
file format, like all 64-bit executables on 64-bit Cygwin (and 64-bit Windows
for that matter).
..mark
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* Re: can't access /cygdrive/c/Windows/Sysnative ?
2016-12-21 20:16 ` Lester Ingber
2016-12-22 1:07 ` Mark Geisert
@ 2016-12-22 12:51 ` Andrey Repin
2016-12-22 18:39 ` Brian Inglis
2 siblings, 0 replies; 7+ messages in thread
From: Andrey Repin @ 2016-12-22 12:51 UTC (permalink / raw)
To: Lester Ingber, cygwin
Greetings, Lester Ingber!
> So, I guess that I should have seen that the Windows 10 Ubuntu bash.exe
> is actually written as a 32 bit code (they didn't use the 64-bit code
> as on my other true Ubuntu x64 platform?)
No, UoW bash is completely different beast. Neiter Win32, nor Win32+.
> from the PE32+ info?:
> 12:08:44pm ingber@lesterX1:/cygdrive/c/Windows/System32# ls -l bash.exe
> -rwxr-x---+ 2 TrustedInstaller TrustedInstaller 70656 Oct 14 20:57
> bash.exe
> 12:08:48pm ingber@lesterX1:/cygdrive/c/Windows/System32# file bash.exe
> bash.exe: PE32+ executable (console) x86-64, for MS Windows
--
With best regards,
Andrey Repin
Thursday, December 22, 2016 15:35:55
Sorry for my terrible english...
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* Re: can't access /cygdrive/c/Windows/Sysnative ?
2016-12-21 20:16 ` Lester Ingber
2016-12-22 1:07 ` Mark Geisert
2016-12-22 12:51 ` Andrey Repin
@ 2016-12-22 18:39 ` Brian Inglis
2016-12-22 19:22 ` Brian Inglis
2 siblings, 1 reply; 7+ messages in thread
From: Brian Inglis @ 2016-12-22 18:39 UTC (permalink / raw)
To: cygwin
On 2016-12-21 13:16, Lester Ingber wrote:
> So, I guess that I should have seen that the Windows 10 Ubuntu
> bash.exe is actually written as a 32 bit code (they didn't use the
> 64-bit code as on my other true Ubuntu x64 platform?) from the PE32+
> info?:
> # ls -l bash.exe
> -rwxr-x---+ 2 TrustedInstaller TrustedInstaller 70656 Oct 14 20:57 bash.exe
> # file bash.exe
> bash.exe: PE32+ executable (console) x86-64, for MS Windows
which is exactly the same as Cygwin 64 bash:
$ file /bin/bash /proc/cygdrive/c/WINDOWS/system32/bash
/bin/bash: PE32+ executable (console) x86-64, for MS Windows
/proc/cygdrive/c/WINDOWS/system32/bash: PE32+ executable (console) x86-64, for MS Windows
as they are both Windows console exes: Windows "bash" is just the
launcher for the console in which WSL/UoW/BfW runs -- trust MS to
pick another wrong and confusing name to be "cute" -- like calling
mintty "bash".
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: can't access /cygdrive/c/Windows/Sysnative ?
2016-12-22 18:39 ` Brian Inglis
@ 2016-12-22 19:22 ` Brian Inglis
0 siblings, 0 replies; 7+ messages in thread
From: Brian Inglis @ 2016-12-22 19:22 UTC (permalink / raw)
To: cygwin
On 2016-12-22 11:39, Brian Inglis wrote:
> On 2016-12-21 13:16, Lester Ingber wrote:
>> So, I guess that I should have seen that the Windows 10 Ubuntu
>> bash.exe is actually written as a 32 bit code (they didn't use the
>> 64-bit code as on my other true Ubuntu x64 platform?) from the
>> PE32+ info?:
>> # ls -l bash.exe
>> -rwxr-x---+ 2 TrustedInstaller TrustedInstaller 70656 Oct 14 20:57 bash.exe
>> # file bash.exe
>> bash.exe: PE32+ executable (console) x86-64, for MS Windows
>
> which is exactly the same as Cygwin 64 bash:
>
> $ file /bin/bash /proc/cygdrive/c/WINDOWS/system32/bash
> /bin/bash: PE32+ executable (console) x86-64, for MS Windows
> /proc/cygdrive/c/WINDOWS/system32/bash: PE32+ executable (console) x86-64, for MS Windows
The PE32 format is to allow execution from or by 32 bit world; the
+ hints it contains 64 bit code, as does the arch x86-64.
From Cygwin 32 the 64 bit WSL/UoW/BfW "bash" launcher is not visible
as the 64 bit system directories are not in the PATH:
$ file `which -a bash`
/usr/bin/bash: PE32 executable (console) Intel 80386, for MS Windows
> as they are both Windows console exes: Windows "bash" is just the
> launcher for the console in which WSL/UoW/BfW runs -- trust MS to
> pick another wrong and confusing name to be "cute" -- like calling
> mintty "bash".
...forgot to add WSL/UoW/BfW bash, which is yet another 64 bit
executable in ELF not PE32/+ format:
$ file `which -a bash`
/bin/bash: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=54967822da027467f21e65a1eac7576dec7dd821, stripped
--
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada
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Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
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2016-12-21 17:09 can't access /cygdrive/c/Windows/Sysnative ? Lester Ingber
2016-12-21 18:12 ` Brian Inglis
2016-12-21 20:16 ` Lester Ingber
2016-12-22 1:07 ` Mark Geisert
2016-12-22 12:51 ` Andrey Repin
2016-12-22 18:39 ` Brian Inglis
2016-12-22 19:22 ` Brian Inglis
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