[comp.sys.ibm.pc] Increasing DOS 3.3 path variable length?

rrodrigu@teknowledge-vaxc.ARPA (Russ Rodriguez) (04/29/88)

I've been wondering if it's possible to make my path string larger than
the DOS V3.3 default of 128 bytes.  Does anyone have any tricks that
will allow this?  I'm willing to patch my command.com in codeview or
debug if necessary.


Russell
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Disclaimer:   The opinions of Russ Rodriguez are his own and couldn't possibly
	    reflect those of his employer: Teknowledge, Inc., of Palo Alto, CA
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usenet:	   {uunet|sun|ucbvax|decwrl|uw-beaver}!rrodrigu%teknowledge-vaxc.arpa
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klooney@amelia.nas.nasa.gov (Karen T. Looney) (05/07/88)

Summary: We've had this problem too!!
Expires: 
References: <22209@teknowledge-vaxc.ARPA>
Sender: 
Reply-To: klooney@amelia.nas.nasa.gov (Karen T. Looney)
Followup-To: 
Distribution: 
Organization: NASA Ames Research Center, Moffett Field, CA
Keywords: DOS dos path

Hey!  Sounds familiar.  Fortunately there is a solution!
Add the following command to your config.sys file (yes, that's
config.sys!) :

shell=command.com /e:xxxx /p

where:     
	xxxx = a number in the range 160 - 32768
	this specifies the size of the environment space
	
	/p causese command.com to remain loaded and procede to
	escute autoexec.bat.

Let me know if you have problems.

karen

looney@uxv.larc.nasa.gov

:wq

feg@clyde.ATT.COM (Forrest Gehrke) (05/10/88)

In article <562@amelia.nas.nasa.gov>, klooney@amelia.nas.nasa.gov (Karen T. Looney) writes:
> Summary: We've had this problem too!!
> shell=command.com /e:xxxx /p

I think the original poster wanted to know how to increase the path
variable length, not how to increase the environment.

Normally dos limits the length of any line to something like 127
bytes, regardless of the size of the environment.  There are 
several schemes to accomplish a longer path variable.  Awhile
back someone posted BIGPATH.  It works on my machine running
msdos 3.2.  I can't speak for anything else.

Herewith is BIGPATH.UUE
---------cut here---------------cut here------------------
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M*#&4X0Q3LP$-,@2L497J5 -1 !H                                 
"  "4
 
end
-------------

Forrest Gehrke k2bt

schung@cory.Berkeley.EDU (Stephen the Greatest) (05/12/88)

Hi.  I am thinking of writing a shell that replaces command.com (Why?
because I am sick of the stupidities of command.com and want a shell
that is tailored to my tastes).  One thing I can't figure out is how
command.com keeps the environment.  Where does it put the environment
strings and how does a program running off command.com finds it.

Any help will be greatly appreciated.  I know there are a lot of IBM
PC experts out there.  I have tried asking several people I know without
results.  Please reply by mail because it is finals week and I won't
probably be catghing up with net news.

Thanks!

					- Stephen