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- MS-DOS Shell Version 1.6 README April 1990
-
- MS-DOS SHELL - Copyright (c) 1990 Data Logic Limited and Charles Forsyth
-
- This code is based on (in part) the shell program written by Charles
- Forsyth and is subject to the following copyright restrictions:
-
- 1. Redistribution and use in source and binary forms are permitted
- provided that the above copyright notice is duplicated in the
- source form and the copyright notice in file sh6.c is displayed
- on entry to the program.
-
- 2. The sources (or parts thereof) or objects generated from the
- sources (or parts of sources) cannot be sold under any circumstances.
-
- $Header: C:/SRC/SHELL/RCS/readme 1.8 90/08/15 01:18:53 MS_user Exp $
-
- $Log: readme $
- Revision 1.8 90/08/15 01:18:53 MS_user
- Add 1.6.3 comment
-
- Revision 1.7 90/04/03 18:07:01 MS_user
- Some changes for 1.6 (Int 24 and Config file)
-
- Revision 1.6 90/03/14 12:37:23 MS_user
- Add some more 1.6 changes
-
- Revision 1.5 90/03/06 17:01:00 MS_user
- 1.6 release
-
- Revision 1.4 90/02/22 16:52:41 MS_user
- Add XMS support
-
- Revision 1.3 90/02/16 16:58:10 MS_user
- Set up 1.5 release
-
- Revision 1.2 90/02/14 04:53:20 MS_user
- Interrupt 24 note
-
- Revision 1.1 90/01/25 13:43:20 MS_user
- Initial revision
-
- ________________________________________________________________________________
-
- This is an implementation of the Unix Shell for MSDOS. As far as
- possible it is compatible with the System V.3 program sh(1). The
- following differences are noted:
-
- 1) Background or asynchronous commands are not supported
-
- 2) Certain internal commands which have no equivalent MSDOS supported
- functionality support (ulimit, time etc) are not provided.
-
- 3) Command hashing and accounting are not supported.
-
- 4) The Shell uses all variables starting with a ~ (tilde) internally
- and will not allow you to display them. I don't think this is a
- difference from the user's view, just internally.
-
- 5) 8 bit character sets are not supported.
-
- The following enhancements have been made for the MSDOS environment.
- These enhancements are described in the appropriate section of the
- manual pages.
-
- 1) The Shell will swap itself out to one of the following:
-
- - Expanded memory
- - Extended memory
- - Disk (this is the slowest)
-
- The swapping is controlled by the shell internal command swap. If
- swapping is enabled, the shell only uses 3K of memory whilst a
- child process is executing.
-
- Note: Swapping to Extended memory is probably the most dangerous
- unless you have an XMS memory manager available. The shell
- requires the XMS manager to support the version 2 XMS
- specification.
-
- 2) History processing has been added.
-
- 3) Command line editing has been added. A configuration file (sh.ini)
- allows the Command Line editing keys to be tailored to the users
- requirements
-
- 4) The command line prompt can be programmed to display 'useful'
- information.
-
- 5) The shell uses Unix format file names (ie slashes and not
- backslashes) to delimit directories. Some programs require certain
- environment variables to be in MS-DOS format (using backslashes).
- The msdos command allows these variables to be marked so that they
- are set correctly when the environment for a program is set up.
-
- 6) Extended command line processing is supported using the parameter
- @<filename> to a command. Examples of this include the Microsoft
- Linker and Librarian and of course the Shell itself. A version of
- stdargv.c which supports this format (and wildcards from a normal
- command line) is included.
-
- 7) Wild cards on drives (ie echo *:*.c will echo all the C files in
- the current directories of each drive) are supported.
-
- 8) Full Interrupt 24 processing has been added.
-
- 9) Filename completion has been added.
-
- 10) Alternate command interpreters are supported in shell scripts a la
- Unix V.4.
-
- 11) A configuration file is supported to allow edit key specification.
-
- 12) The support of POSIX P1003.2 commands has been started.
-
- The shell was built using MS-DOS C and MASM v5.1 in large model mode.
-
- In order to rebuild this program, you need the DIRECTORY(3) functions
- for MSDOS (also included) and the version of open in your library must
- pass the O_NOINHERIT bit on the MSDOS kernel. The Microsoft C V5.1
- library does not pass this bit on to the MSDOS open System call. I
- fixed this using CodeView to find where the library function masks off
- the bottom 2 bits. Extracted the object from the library and patched
- mask from 0x03 to 0x83 in the object and reload into the library. No
- Problem. The Patch.Lib document describes the process in more detail.
-
- You can do want you like with this software as long as you don't sell
- it or remove the Copyright notices in the sources or object.
-
- If you have any problems or want to let me know about any enhancements
- you have made (which could be included in a new general release), you
- can contact me at
-
- Data Logic Limited
- Queens House
- Greenhill Way
- Harrow
- Middlesex, HA1 1YR
- UK.
-
- Phone : +44 1 863 0383
- E-Mail: istewart@datlog.co.uk or ukc!datlog!istewart
-
- Note:
- Unix is a registered trademark of AT&T Bell Laboratories
- Microsoft, MSDOS and CodeView are registered trademarks of Microsoft
- Corporation
-