Here code that doesn't use at but sleep; it doesn't need external storage of data but runs continuously.
Wat i suggest is to log evrything in the beginning by echoing the variables to the logfile, mainly the Delay to see if you have to adjust the tolerance at another value.
I let you code the different logs you want to make (i can help u) but try first the functioning of the script. You can add lines for monitoring purpose by echoing commands or start the script with the -x parameter like bash -x simple.sh
Code:
#!/bin/bash
File1=simple.txt # The file to check
LogFile=simple.log # The log file
DelayMax=30 # Timeout delay
Tolerance=2
# BEGIN ##############################
while true
do
StampNow=$(date +%s)/60 # stamp in minutes
StampFile=$(date -r "$File1" +%s)/60
let Delay=$StampNow-$StampFile
if [ $Delay -gt $DelayMax ]
then
echo "$(date) : ERROR : Timeout" >> $LogFile
# etc.
exit 1
elif [ $StampFile -eq $StampOld ]
then
sleep $Tolerance minutes # Retry a bit later
else
StampOld=$StampFile
let NewDelay=$StampNow-$StampFile+15+$Tolerance # To synchronize with the updating
sleep $NewDelay minutes
fi
done
nothing more before 7:00 or 8:00 GMT
Code:
frans@localhost-$ sleep 8 hours
Last edited by frans; 11-06-2009 at 07:15 PM..
Reason: it's late
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Discussion started by: Pop45398
1 Replies
LEARN ABOUT MOJAVE
sleep
SLEEP(1) BSD General Commands Manual SLEEP(1)NAME
sleep -- suspend execution for an interval of time
SYNOPSIS
sleep seconds
DESCRIPTION
The sleep command suspends execution for a minimum of seconds.
If the sleep command receives a signal, it takes the standard action.
IMPLEMENTATION NOTES
The SIGALRM signal is not handled specially by this implementation.
The sleep command will accept and honor a non-integer number of specified seconds (with a '.' character as a decimal point). This is a non-
portable extension, and its use will nearly guarantee that a shell script will not execute properly on another system.
EXIT STATUS
The sleep utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
To schedule the execution of a command for x number seconds later (with csh(1)):
(sleep 1800; sh command_file >& errors)&
This incantation would wait a half hour before running the script command_file. (See the at(1) utility.)
To reiteratively run a command (with the csh(1)):
while (1)
if (! -r zzz.rawdata) then
sleep 300
else
foreach i (`ls *.rawdata`)
sleep 70
awk -f collapse_data $i >> results
end
break
endif
end
The scenario for a script such as this might be: a program currently running is taking longer than expected to process a series of files, and
it would be nice to have another program start processing the files created by the first program as soon as it is finished (when zzz.rawdata
is created). The script checks every five minutes for the file zzz.rawdata, when the file is found, then another portion processing is done
courteously by sleeping for 70 seconds in between each awk job.
SEE ALSO nanosleep(2), sleep(3)STANDARDS
The sleep command is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible.
HISTORY
A sleep command appeared in Version 4 AT&T UNIX.
BSD April 18, 1994 BSD
11-06-2009
