CORE-13682
- Split SubstituteVars() into its main loop and a helper SubstituteVar()
that just substitutes only one variable.
- Use this new helper as the basis of the proper implementation of the
delayed expansion of variables.
- Fix a bug introduced in commit 495c82cc, when GetBatchVar() fails.
CORE-11857 CORE-13736
It will be followed with a separate fix for the FOR-loop code.
Fixes some cmd_winetests.
A NULL pointer can be returned for a valid existing batch/FOR variable,
in which case the enhanced-variable getter should return an empty string.
This situation can happen e.g. when forcing a FOR-loop to tokenize a
text line with not enough tokens in it.
- Display the names of the files being TYPEd only if more than one file
has been specified on the command-line, or if a file specification
(with wildcards) is present (even just for one).
These names are displayed on STDERR while the files are TYPEd on
STDOUT, therefore allowing concatenating files by just redirecting
STDOUT to a destination, without corrupting it with the displayed file
names. Also, add a /N option to force not displaying these file names.
- When file specifications (with wildcards) are being processed, silently
ignore any directories matching them. If no corresponding files have
been found, display a file-not-found error.
- When explicitly directory names are specified, don't do any special
treatment; the CreateFile() call will fail and return the appropriate
error.
- Fix the returned errorlevel values.
See https://ss64.com/nt/type.html for more information.
Fixes some cmd_winetests.
- When reading from a file, retrieve its original size so that
we can stop reading it once we are beyond its original ending.
This allows avoiding an infinite read loop in case the output of
the file is redirected back to it.
Fixes CORE-17208
- Move the FileGetString() helper to the only file where it is
actually used.
This functionality is: case insensitivity comparisons (/I);
CMDEXTVERSION and DEFINED unary operators; EQU, NEQ, LSS, LEQ, GTR, GEQ
generic string comparators.
We note two things, when CMD searches for the corresponding label in the
batch file:
- the first character of the line is always ignored, unless it's a colon;
- the escape caret ^ is supported and interpreted.
Fixes some cmd_winetests.
CORE-13713 CORE-13736
- In case execution of all batch contexts is stopped (by selecting "All"
at the Ctrl-C/Ctrl-Break prompt), notify as well the CheckCtrlBreak()
signal handler once there are no more batch contexts (this in effect
resets the internal 'bLeaveAll' static flag in CheckCtrlBreak).
This is an adaptation of the fix present in FreeCOM 1.5, first
described in https://gcfl.net/FreeDOS/command.com/bugs074g.html .
- Introduce a ParseErrorEx() helper that sets the 'bParseError' flag and
displays a customized syntax-error message, only for the first syntax
error encountered. Implement ParseError() around the *Ex function.
- In batch mode, echo the original pre-parsed batch file line if a parse
error has been encountered.
- When running a compound command - including IF, FOR, command blocks -,
and that control flow is modified by any CALL/GOTO/EXIT command,
detect this while running the compound command so as to stop it and go
back to the main batch execution loop, that will then set up the actual
new command to run.
- In GOTO, do not process any more parts of a compound command only when
we have found a valid label.
This allows to break commands such as:
C:\ReactOS\system32> for %f in (*.*) do dir
as one would expect: stop the currently running 'dir' and the 'for'.
"bCtrlBreak" doesn't need to be volatile too.
Using CTRL-C to cancel command line input would leave the prompt in
a state where the next command would be ignored. For example:
dir<CTRL-C>
dir
would cause cmd.exe to ignore the second dir command.
