using 'printf' in a script in terminal window

[Mike McNally]

According to

  http://tinyurl.com/yh8qye9

the VT-102 "clear screen" escape sequence is ESC [ 2 J, and indeed when I run

  printf '\033[2J'

on those terminal emulators, the screen clears in each one.


On Sat, Nov 21, 2009 at 6:26 PM, Mike McNally <emmecinque at gmail.com> wrote:
> I've tried
>
>  printf '\f'
>
> in the following terminal emulators:
>
>  gnome-terminal
>  xfce4-terminal
>  xterm
>  Eterm
>  aterm
>  rxvt
>  evilvte
>
> In none of them does the screen clearl; they all seem to treat it the
> same way, which is as a form feed.  I think that's because that's what
> the VT-102 did.
>
>
> On Sat, Nov 21, 2009 at 5:27 PM, Jerry <gesbbb at yahoo.com> wrote:
>> On Sat, 21 Nov 2009 15:13:35 -0600
>> Mike McNally <emmecinque at gmail.com> replied:
>>
>>> I'm running Linux, and yes I was talking about the console, not an X
>>> terminal emulator.
>>>
>>> Note that the only way for "printf" to clear the screen reliably
>>> would be for it to do exactly the same thing that "clear" does. (Key
>>> word there is "reliably.")
>>>
>>> I won't defend the status quo as representing a state of perfection
>>> of course. Back in the 70's the real-world day-to-day problem that
>>> was the ridiculous variation in ASCII terminal capabilities was
>>> insane.  At least nowadays the vast majority of "terminals" in use
>>> are xterm (or whatever-term). Still, there are surprisingly many
>>> variations even of that animal (though I suspect that most of them
>>> more-or-less behave like xterm, which itself is mostly like a VT-100
>>> or VT-something, I think).
>>
>> I just received a response from one of the Terminal developers. He
>> wants to know if this behavior is also apparent in vte (and/or
>> gnome-terminal). If you, or anyone else could supply me with a
>> definitive response I would appreciate it. He seems to be inclined to
>> consider this a BUG.
>>
>> --
>> Jerry
>> gesbbb at yahoo.com
>>
>> |::::=======
>> |::::=======
>> |===========
>> |===========
>> |
>>
>>
>>
>>        now I don't know what to add.
>>
>>
>>        Steven Wright
>>
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>> http://www.xfce.org
>>
>
>
>
> --
> Turtle, turtle, on the ground,
> Pink and shiny, turn around.
>



-- 
Turtle, turtle, on the ground,
Pink and shiny, turn around.