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Notes from contributors....
Notes from Hans B Pufal <hansp@digiweb.com>:
Here is my package of changes to COMMAND, my coding was based on version
74B, but I downloaded version 74D and modified my files accordingly.
I use BC 4.5 and had some problems with the makefile, it was generating
a .COM file of 102Kb!. I have included my modified makefile for your
reference.
For the files I have modified, I have reformatted them to my style (sorry).
Take a look and see if you can live with it. I find that procedure headers
are easier to find and that putting the history in reverse order helps
quickly find the latest changes.
File Description
batch.c A new version, implements CALL, ECHO, GOT, IF, PAUSE, SHIFT
and BEEP. There is a stub for FOR but that's all.
cmdtable.c New file to keep the internal command table. I plan on
getting rid of the table real soon now and replacing it
with a dynamic mechanism.
command.c A new (improved ;) version. Conforms closely to MS-DOS
specs. Cleaned up (and fixed) the redirection handler.
command.h Your version D with changes. Look for the HBP tag.
makefile My version of the makefile, for BC 4.5. Sorry don't use
the IDE so could not make a .prj file.
notes.txt This file...
redir.c Modified file, now supports append redirects.
where.c Modified, made it a little safer and quicker...
The test subdirectory has some batch file tests. I run T.BAT which uses
runs the test and sends output to a file. The tests are run twice once
for a COMMAND.COM on the patch (presumably ours) and once with
C:\COMMAND.COM, presumed to be the MSDOS version. Compare the outputs in
MSDOS.OUT and FDOS.OUT to look for any problems.
That's about it, ask if you have any questions.
Regards,
Hans <mailto:hansp@digiweb.com>
-----------------------------------------------------------------------------
10-Aug-1998 0.75b Steffen Kaiser <skaise2a@smail.inf.fh-rhein-sieg.de>
+ Corrected ^Break handling in batch.c
Try something like this:
===== File batch1.bat
@echo off
echo Hi Batch1.bat
echo Hi Batch1.bat
===== File batch2.bat
@echo off
:loop
call batch1.bat
goto loop
=====
The press ^Break or ^C. Most of the time you are asked to
terminate BATCH1.BAT (Y/N/A), if you press 'Y', you only terminate
BATCH1, but BATCH2 continue. But if you press 'A' (or ^C),
even BATCH2 is terminated.
+ added modifyable batch scripts (following the standard)
+ bug: nested comments in old split()
+ bug: DEL memory allocation
+ added ^Break checks to cmd_type(), cmd_dir()
+ added: chkCBreak(0) [aka "cbreak"] is a generic form that autodetects
if currently a batchfile is active and displays the batchfile
prompt, if so.
The batchfile prompt now displays the name of the batchfile.
+ echo off on command line --> frozen computer
+ The initialization code init() is still broken (included in my last
patch).
+ In init() the errorlevel of the processed command is returned.
This is a nice feature, however, MS COMMAND returns '0' to
indicate a successful run of COMMAND itself. It's non-standard,
offer an option.
+ fixed DEL char **arg allocation --> allocating a dynamic memory area
for each arg[] element, however, split() simply overwrites them and
they are no dynamic pointers for their own.
+ The DEL access()/stat() stuff is still broken (included in my last
buglist report)
+ The find_which() is still broken as it searches through PATH prior
testing all extensions within one directory.
+ Someone removed the ^Break catcher. It makes not much sense to incorporate
^Break checks, but running without a ^C catcher. Therefore I have
re-added the catcher, this time using signals (the DOS emulation of
them, however).
-----------------------------------------------------------------------------
COPY.TXT
Rob Lake
Aug-19-98
Notes:
o Crashes when returning from cmd_copy. Works fine on its own
(see mod_copy.zip). I can't figure out why myself. I think that
there is a memory allocation problem somewhere. Hopefully someone
more experienced can track it down.
o I named the module version of copy `cp' to resolve possible abiguity of
naming it copy.
o I don't remember exactly what time I started writing, so I figured around
Aug 1.
o Although the program accepts the /Y or /-Y switches, it does not do
anything with them, yet.
o The default mode for copying is BINARY
o Specify /a before or after the destination file, if one is given,
will append the destination with a ^Z character. Place appropriate
warning here. Ex. These commands will add the ^Z character:
cp "/a cp.com cp.txt"
cp "cp.com + /a cp.obj cp.txt"
cp "cp.com /a cp.txt"
cp "cp.com cp.txt /a"
o You can define the mode for all files in the command line. Ex.
cp "/b cp.com + /a copy.c + /a copy.obj /b cp.txt"
works (for whatever reason someone would want to do that:-).
o The following commands where tested with the module copy:
cp c:\autoexec.bat
cp "c:\autoexec.bat test.bat"
cp "..\ temp"
- Given that ..\ has files. If temp is a directory, will copy all files
to it. If temp is a file or does not exist, all the files with be copied
to .\temp. NOTE: Appended to temp, not over written each time.
cp "cp.com test.com"
cp "/a cp.com cp.txt"
cp "file1+file2+file3 file4"
- Will ask to overwrite file4 after file1 has been copied. This will be
fixed later.
cp "file5+file1+file2+file3"
- This appends file1, file2 and file3 to file5. Will ask to overwrite
file5 when file2 has been copied, if file5 does not exist. Will be fixed
later.
- MS-DOS copy doesn't create file5 if it does not exist. It
concatenates all to file1, it should print an error message. This copy
creates a file5 if one does not exist. This can be changed later.
o This command doesn't work yet:
cp "*.c+*.h *.txt"
- If tried, will print "NOT IMPLEMENTED YET" message. This command may be
kind of confusing. Take for example you have a directory with these files:
file1.c file1.h
file2.c file2.h
The command above will copy file1.c and file1.h to file1.txt and file2.c
and file2.h to file2.txt. If, say, file1.h does not exist, copy will
produce the messages:
FILE1.C
FILE1.H
File not found - FILE1.H
Invalid handle - FILE1.TXT
0 file(s) copied
-----------------------------------------------------------------------------
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