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Preventing sleep
Posted: Fri Mar 30, 2007 11:26 am
by Chris
Hello -
does anyone know of a good way to prevent a machine (os x) going to sleep? I have written a simple photo/video display program to show my snapshots, but I'm becoming increasingly bothered about killing the planet. I want to set my mac mini to sleep after a few minutes of inactivity - but *not* if my slideshow is running.
So I need a way to prevent the comp going zzzzzzz.
(Of course in real-life, the simplest way to prevent sleep is to have kids...)
Chris
Posted: Fri Mar 30, 2007 1:24 pm
by Mark
Hi Chris,
Here are three scripts for Mac OS X.
Code: Select all
function sleepTime
return shell("pmset -g | grep displaysleep | awk '{ print $2; }'")
end sleepTime
on setSleepTime theMins
ask "Enter your password"
if it is not empty then
put it into myPW
put "#!/bin/sh" & cr into myScript
put "pw=" & quote & myPW & quote & cr after myScript
put "echo $pw | sudo pmset dim " & theMins & cr after myScript
put myscript
put shell(myScript) into rslt -- do the command & get the result
if rslt is not empty then
beep
answer error "Sorry, a problem occurred." & cr & cr & rslt with "Okay"
end if
end if
end setSleepTime
on setSleepTimeAS theMins
put "sudo pmset dim " & theMins into myShell
put "try" & cr & ¬
"do shell script" && quote & myShell & quote && "with administrator privileges" & cr & ¬
"on error myErr number myErrNr" & cr & ¬
"set myErrMsg to myErr & ' (' & myErrNr & ')'" & cr & ¬
"end try" into myScript
replace "'" with quote in myScript
do myScript as AppleScript
put the result into rslt
if rslt is not empty and rslt is not (quote & quote) and "(-128)" is not in rslt then
beep
answer error "Sorry, a problem occurred." & cr & cr & rslt with "Okay"
end if
end setSleepTimeAS
(mind line wraps).
The sleepTime function returns the current delay until the monitor is put to sleep. The other two handlers set this delay.
The setSleepTime handler allows you to enter a password, either by script or manually, without intervention of the OS. Replace the ask dialog with your own dialog or include the password in your script.
If you want others to use your application, you probably want to display the native password dialog of Mac OS X rather than a custom dialog. Use the sleepTimeAS handler, which uses AppleScript, to achieve this.
Best,
Mark