sounds like this really should just be kicked off as a cronjob. The cron entry will simply look like (run on the hour from 11PM to 6AM, inclusive): 
  0 23-6 * * * /some/dir/yourscript

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Note that the big advantage of having cron deal with the scheduling is that you don't have to worry about your while(1){ ... } program getting hung or killed.

In reply to Re: sleep() but don't exit by davidrw
in thread sleep() but don't exit by Anonymous Monk

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