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Post subject: Clear screen on startup script
 Posted: Apr 14, 2008 - 11:09 AM
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Active Member
Joined: Oct 18, 2004
Posts: 83
Location: Spain
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Hello,
Is there any way to clear the screen in the startup script? I mean something like:
display_msg system is on
sleep 5
clear_screen
Thanks,
Grillo Solitario |
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Post subject: RE: Clear screen on startup script
Posted: Apr 14, 2008 - 01:59 PM
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Active Member
Joined: Dec 14, 2005
Posts: 34
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Hello Grillo,
That is not an elegant solution, but a number of
display_msg “”
will clear the screen.
Thanks,
Yuriy |
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Post subject:
Posted: Apr 14, 2008 - 02:08 PM
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Senior Member
Joined: Mar 10, 2004
Posts: 512
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A CTRL-L command in a terminal window will clear the screen.
So you might be able to find a way to use display_msg to send a CTRL-L.
The other option is writing a 1 line C program that just does a printf of a CTRL-L and then put your executable in the boot image and call it to clear the screen.
Tim |
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Post subject:
Posted: Apr 14, 2008 - 10:40 PM
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New Member
Joined: May 13, 2004
Posts: 7
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The echo command can be used to send the CTRL-L to the screen. Put echo "\14" or echo "\f" into it's own file, make the file executable and you will have a clear screen command!
Gord |
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Post subject:
Posted: Apr 15, 2008 - 04:54 AM
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Senior Member
Joined: Oct 06, 2003
Posts: 147
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Post subject:
Posted: Apr 16, 2008 - 08:12 AM
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Active Member
Joined: Oct 18, 2004
Posts: 83
Location: Spain
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Hello,
I've tried the two last methods, but they don't work. I must say I run a photon application when starting the system. This application has an exit button that runs the shutdown command. When QNX finishes the shutdown process, the screen has all the booting messages, and that's what I want to remove.
I suppose yuriy's method may work, but it would fill the buildfile of "display_msg", and I would like a smarter solution.
Thank you all. |
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Post subject:
Posted: Apr 16, 2008 - 02:18 PM
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Senior Member
Joined: Mar 10, 2004
Posts: 512
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Ah, those messages are not part of any shell but are instead written directly to the screen. So the clear and CTRL-L methods won't work.
I think you'll have to use Yuri's method.
The only other thing you can do is to start the console driver as part of your boot process. That will grab the screen and clear it but then you will see a login prompt when photon shuts down (not sure if that's OK).
Tm |
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