re: current directories

[Dan Kegel]

Eric wrote:
> - our current {Get|Set}CurrentDirectory functions behave like the win16
>
> implementation, and maintain a/ a default drive, b/ a default directory 
> on each drive

That's what I expect as a user when doing "cd"'s and changing drive
letters at the command.com prompt.  I just verified that this is
what one sees from command.com in windows me:

C:> cd d:vss
C:> d:
D:\VSS>

So if win32 isn't doing it, command.com is simulating it?
> - Win32, on the other end, just maintains a current directory. When
>
> using a relative path with a drive letter (like c:foo), win32 actually 
> uses the directory on drive c:, defined at startup (and passed into the 
> =c: environment variable)
> - the =#: (# in [A,Z]) environment variable is never changed (even when
>
> changing the current directory)

How do you display those variables?  I have a C program that
iterates through envp[] and it doesn't see 'em.
- Dan

current directories

[Eric Pouech]

Dan Kegel wrote:
> Eric wrote:
> > - our current {Get|Set}CurrentDirectory functions behave like the
> >
> > win16 implementation, and maintain a/ a default drive, b/ a default 
> > directory on each drive
>
> That's what I expect as a user when doing "cd"'s and changing drive
> letters at the command.com prompt.  I just verified that this is
> what one sees from command.com in windows me:
>
> C:> cd d:vss
> C:> d:
> D:\VSS>
>
> So if win32 isn't doing it, command.com is simulating it?

yes, the shell does it from what I see (it's supposed to be default 
behavior for DOS and Win16 programs)
> > - Win32, on the other end, just maintains a current directory. When
> >
> > using a relative path with a drive letter (like c:foo), win32 actually 
> > uses the directory on drive c:, defined at startup (and passed into 
> > the =c: environment variable)
> > - the =#: (# in [A,Z]) environment variable is never changed (even
> >
> > when changing the current directory)
>
> How do you display those variables?  I have a C program that
> iterates through envp[] and it doesn't see 'em.

GetEnvironmentVariable (which is the TRUE win32 API)
envp comes from msvcrt (which also seems to implement the per-drive 
current directory scheme thru the _chdir (and the likes))

A+