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1992-06-20
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Version 2.0 Release Notes:
Release 2.0 has had significant parts re-written and much of the POSIX (Korn)
Shell functionality implemented.
Addition New Functionality:
1. The format of the history file has changed match some of the
functionality provided by the POSIX shell.
2. The format of the EXTENDED_LINE file has changed to provide a number of
difference ways of processing command line parameters and overcoming
the 127 or 255 byte limitation of DOS and OS/2.
3. The OS/2 port has been tested (on release 1.3 and 2.0 beta) and a number
of OS/2 specific builtins have been added.
Missing POSIX Shell functionality:
1. The PS1 prompt is not expanded.
2. The getopts builtin is not implemented
3. POSIX command line editing is not implemented.
4. OS/2 uses files and not pipes to pipe data.
The following enhancements/bugs remain outstanding:
1. The processing of the escape character (\) is not consistent with the
Korn shell. The MS-Shell always strips the first escape character.
The Korn shell only strips escape characters when it detects a shell
special character following.
ie. echo "\033[H" works under Korn however echo "\\033[H" is required
in the MSDOS shell.
This problem requires a large amount of rework to one 30K source file
and I haven't been able to start on it yet.
2. 8 Bit character are not supported. This is tied in with the processing
of escape characters. The shell uses the 8-bit to mark escaped
characters.
3. Interrupting a swap at the wrong time may cause the shell to hang. I've
not been able to track this down.
Thanks are due to
Francis Klay
Prof. Ken Turner
David Darknell
Richard Reiner
Gunther Schadow
Doug Konkin
Dr. Greg Wettstein
Prof. Charles Dyer
for their comments, fixes, tolerance etc in testing release 2.0
Ian Stewartson.