Re: Command-line length
>Date: Fri, 22 May 1998 09:28:09 -0400
>>
>>Robert Craig wrote:
>>>
>>> Terry Constant wrote:
>>> > 4Dos allows a command-line length of 255 characters,
>>> > 511 after expansion of environment variables.
>>> > Apparently Euphoria limits the command-line to the
>>> > Dos length of 128. ....
>>> Rob Craig wrote:
>>> ....I'm not limiting anything to
>>> 128 characters inside Euphoria itself.
>>>
>>> Regards,
>>> Rob Craig
>>> Rapid Deployment Software
>>
>>Rob,
>>Thanks for your reply. But I do think that there is something unique
>>about how Euphoria handles a command-line longer than 128 chars.
......
>>When Euphoria gets this long line, it completely crashes and produces
>>Cw.err. You get a beep when you try which is probably Dos balking at
>>more than 128 characters. 4Dos passes such long lines on to the program.
>> Some accept 4Dos's long command-line.
------------------------------------
Wild guess #1: when DOS creates a PSP for Euphoria
(or any program) it allocates a fixed length area in which to
pass the command line (offset 80h within the psp).
Only 91 bytes are allotted, because the filename(s)
are stripped off first. This is a core DOS function,
probably used by 4DOS as well.
Wild guess #2: perhaps 4DOS and 4DOS compatible programs
use the undocumented 2Eh call (alternate EXEC) to process
the longer line?
No flames, please. I don't know much about DOS. That's why
these are called guesses.
Irv
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