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From: metcalf@ucbmiro.ARPA (Chris Metcalf)
Newsgroups: net.micro.pc
Subject: Re: MS-DOS cd command
Message-ID: <25@ucbmiro.ARPA>
Date: Mon, 10-Jun-85 00:43:22 EDT
Article-I.D.: ucbmiro.25
Posted: Mon Jun 10 00:43:22 1985
Date-Received: Tue, 11-Jun-85 08:48:01 EDT
References: <2160@mhuxd.UUCP>
Reply-To: metcalf@ucbmiro.UUCP (Chris metcalf)
Organization: U.C. Berkeley
Lines: 8

To restrict a user from changing directories, blank CD and CHDIR in COMMAND.COM
(as discussed), and create a CD.COM file using MASM that allows access only to
certain subdirectories--not too hard in assembler; just use the DOS 2.00 hex 3D
function call, with string tests.  To make "CD" return to the home directory,
the cleanest way is probably to put a "HOME=" entry in the environment and read
it (the segment address of the environment is at hex 2C in the initial DS).

Chris Metcalf  	ARPA metcalf@ucbmiro.BERKELEY	UUCP ...!ucbvax!ucbmiro!metcalf