This is the mail archive of the cygwin@cygwin.com 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/bash: need environment variables >32K


On Thu, 23 Oct 2003, Nicolas BUONOMO wrote:

> Corinna Vinschen a ecrit :
>
> > On Thu, Oct 23, 2003 at 11:39:39AM +0200, david.liberce wrote:
> >
> >>I reproduce this behaviour.
> >>
> >>Looks like the PATH  environment variable is not valid anymore after $VAR
> >>has been asigned?
> >
> >
> > Nope.  I debugged this situation.  It looks like a Windows restriction.
> > When trying to call CreateProcess() with this long environment variable
> > in the environment block, CreateProcess() fails with Windows error 87,
> > "The parameter is incorrect."  But there's no hint about a limit in the
> > CreateProcess() man page.
> >
> > *dig, dig, dig*
> >
> > Uh, ok, I found the following hint in the GetEnvironmentVariable() man page:
> >
> >   lpBuffer
> >       [out] Pointer to a buffer that receives the contents of the specified
> >       environment variable. An environment variable has a maximum size limit
> >       of 32,767 characters, including the null-terminating character.
> >
> > So, that explains it.
> >
> > Corinna
>
> I think it's possible to change the size of the environnement for
> the DOS box. I have do that for DOS application (on NT4), but I
> don't remeber how. I try to find it.
>
> Nicolas

It's the "/E" flag to cmd.exe.  However, that doesn't help you, as it only
increases the size of the *total* environment.  Each individual
environment variable is still limited to 32k.  That's Windows for you.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha@cs.nyu.edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor@watson.ibm.com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"I have since come to realize that being between your mentor and his route
to the bathroom is a major career booster."  -- Patrick Naughton

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/


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