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Old 04-19-2005, 04:21 AM   #1
Registered: Jan 2005
Distribution: debian
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stopping programs

i usually run large simulations, and it happened sometimes power to go down suddenly, i don't know why.
I have a UPS linked to my desktop, but i do not know how to stop the simulation running while UPS keeps the pc on for a short time (10 minutes) before everything goes down.
I'd like to restart my programs just at the same point where they have been stopped.

Any suggestions welcome.

Old 04-19-2005, 04:34 AM   #2
Simon Bridge
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Registered: Oct 2003
Location: Waiheke NZ
Distribution: Ubuntu
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You can stop anything you run in terminal with control-c - provided you don't disable the keyboard.

You can program an emergency interrupt into the simularion so it watches for a keystroke while it's running and exist if it sees one.

Of course - if the UPS talks to the computer then you may be able to get the program to check for a power-down and then it can exit on it's own. But control-c is probably what you want.
Old 04-19-2005, 04:36 AM   #3
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Registered: Jul 2004
Location: France
Distribution: Arch Linux
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Since you want to restart things at the same point they were before getting stopped, I suggest you try and use suspend. Depending on your hardware, it may be easiest to use ACPI suspend to disk, or "Software Suspend 2" suspend to disk, or ACPI suspend to ram.

Any of those is so specific, that you'll have to start another thread in case you have difficulty with either.

Next, you'll want of course to fire the suspend operation in case of power shortage. I have absolutely no experience with that, but I remember seeing something about it in the /etc/inittab file.

Good luck!



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