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Top Forums Shell Programming and Scripting search for a file, if not found sleep and repeat it for 3 hrs Post 302245141 by treesloth on Thursday 9th of October 2008 12:15:52 PM
Old 10-09-2008
This won't be a complete answer, as ksh really isn't my thing; however, I would base a quick and dirty script of this kind you describe on the fact that there are 18 10-minute periods in 3 hours. So, something like this might be a reasonable framework:

Code:
integer n=0
while ((n <= 18));
do
     if [[ -e filename ]]
          then
               integer n=19
          else
               if [[ n = 18 ]]
                    Send your mail with whatever command you need....
               else
                    sleep 600
               fi
     fi
n++
done

Anyway, that's the idea... it'll require lots of work, and I would be stunned if it ran without significant alteration. Some of it probably isn't even valid ksh. Hopefully it gives you a starting point, though.
 

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leave(1)						      General Commands Manual							  leave(1)

NAME
leave - remind you when you have to leave SYNOPSIS
[hhmm] DESCRIPTION
The command waits until the specified time, then reminds you to leave. You are reminded 5 minutes and 1 minute before the actual time, at the time, and every minute thereafter. When you log off, exits. The time of day is in the form hhmm, where hh is a time in hours (which can range from 0 through 11 or 0 through 24 hours), and mm is the number of minutes after the specified hour. If the value of hh is greater than 11 (24-hour clock time), the specified value is reduced by 12 to a new value in the range of 0 through 11, thus ensuring that the alarm time is always set to activate within the next 12 hours. For example, if hhmm is 1350 and the current time is 4:00 PM (1600), the 1350 value is changed to 150 and the alarm is set for 1:50 AM, nine hours and 50 minutes later. On the other hand, if it is 9:00 AM and hhmm is specified as 2200 (10:00 PM), the value used is converted to 1000 and the alarm is set for one hour later instead of 13 hours as specified. If no argument is provided, prompts with A reply of newline causes to exit; otherwise the reply is assumed to be a time. This form is suitable for inclusion in a or file. The command ignores interrupts, quits, and terminate signals. To get rid of it you should either log off or use giving its process ID. EXAMPLES
The command sends an alarm (a beep) to your terminal to remind you that you have to leave at 12:04 and reminds you that you are late at one minute intervals after 12:04. WARNINGS
The command checks to see if a user has logged out by checking the file every 100 seconds. If a user logs out and logs back in to the same tty before makes its periodic check, may not know that the user has logged out. AUTHOR
was developed by the University of California, Berkeley. FILES
SEE ALSO
calendar(1). leave(1)
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