HIGHESTNUMANODENUMBER

[dbenham]

My interpretation of what Magoo has written differs a lot!
I think he said(in other words): The "for" command needs the dynamic variable in order to work correctly.

This is not a different interpretation. We are trying to say the same thing. But I like your way of putting it.

And in addition i think Magoo predicts, that "c:\test" is returned in your above example, although the static environment variable __CD__ is set to "z:\bogus\".

SET __CD__ to whatever you like, the current dirname will STILL be echoed.
PUSHD someconvenientdir before that FOR and someconvenientdir will be echoed.
SET CD=bogus and the current directory will be echoed (...)

After using "PUSHD someconvenientdir" someconvenientdir is the current directory.
=> Prediction: The current (real) directory is returned no matter of the value in the static environment variable:

~f will use %__CD__% NOT from the environment where the directoryname isn't explicit

But I don't think Magoo was aware that %__CD__% behaves differently on XP, as evidenced by MC ND's answer and foxidrive's comment. On XP, ECHO %__CD__% displays the static environment variable, if one is defined. On Win 7 and Win 8 it always displays the actual current directory, even if a static user value is defined.

Btw: Using your above example, Windows XP returns "C:\test".

Excellent! I believe this proves that FOR must not be using the dynamic variable to retrieve the current directory. If you can add one more line to the end of the test: echo %__CD__%, then all the evidence will be in one place.

Based on what you report, %%~fA returns C:\test on XP.

Based on MC ND's answer and foxidrive's comment, echo %__CD__% should return z:\bogus\test on XP.

In my mind, this would disprove Magoo's theory that FOR needs the __CD__ dynamic variable to work properly.


Dave Benham

[bars143]

code below:

Code: Select all

@echo off
setlocal
set "__CD__=z:\bogus\"
pushd c:\
for %%A in (test) do echo %__CD__%%%A

will output in my window xp sp3 :

Code: Select all

z:\bogus\test

[foxidrive]

This returns the folowing in XP Sp3 Eng 32 bit


c:\test
z:\bogus\

Code: Select all

@echo off
setlocal
set "__CD__=z:\bogus\"
pushd c:\
for %%A in (test) do echo %%~fA
echo %__CD__%
pause

[dbenham]

Thanks foxi I think this disproves Magoo's theory once and for all.


Dave Benham

[aGerman]

Interesting read

Finally it's still a miracle for what the __CD__ variable is used internally.
Maybe we will find the answer somewhen by a fluke.

Regards
aGerman

[carlos]

npocmaka_ the variable HIGHESTNUMANODENUMBER is present in windows 7, and when you query it to cmd, it look in the environment variable if is present, it do a thing similar to this in pseudocode:

var_name = "HIGHESTNUMANODENUMBER"
result = GetEnvironmentVariable(var_name)
if not result then
if var_name == "HIGHESTNUMANODENUMBER" then
return GetNumaHighestNodeNumber()
end if
end if

if you not set a environment variable called HIGHESTNUMANODENUMBER, cmd call to the function GetNumaHighestNodeNumber() http://msdn.microsoft.com/en-us/library/windows/desktop/ms683203%28v=vs.85%29.aspx