[fpc-pascal] fpsystem output
Michael Van Canneyt
michael at freepascal.org
Tue Jan 15 13:55:50 CET 2013
On Tue, 15 Jan 2013, Rainer Stratmann wrote:
> Am Tuesday 15 January 2013 13:41:19 schrieb Mark Morgan Lloyd:
>> Rainer Stratmann wrote:
>>>> in order to do it's magic, CRT must control the terminal.
>>> Are there alternative ways to write something on the screen and to clear
>>> the screen?
>>> For example with unit system?
>> In the general case, that's going to be terminal-specific. If you only
>> want stdout (and/or stderr) output you'd need to know what escape
>> sequence to sent to the terminal (possibly with reference to
>> termcap/terminfo- I don't know whether there are libraries to handle
>> this) but if you wanted full control like you get with the FP IDE I
>> think you'd be using the old TurboPower stuff.
>> In extremis, if you're already invoking an external program and want to
>> clear output after it runs, and if you know that you're running on a
>> unix, you could simply invoke the clear program.
>> Going back to your original question, I see no reason why you couldn't
>> open and parse e.g. /proc/partitions as an ordinary text file.
> This is one thing.
> Another thing are the error messages from freepascal which behave the same
> And other output messages (for example dhcp service programs).
> Isn't it possible to make a function in crt that makes the behaviour wanted?
> Something like crt.turn_linefeed_on(); or similar.
No, it is not.
CRT is simply not meant to be mixed with raw output, and definitely not from other programs.
There would be no end to the number of problems.
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