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Script to check the files existence inside a directory.

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Top Forums Shell Programming and Scripting Script to check the files existence inside a directory.
# 15  
Old 10-31-2017
How do you know when all the files have been received. You could try to continually create the list of the last 3 files until the list no longer changes.

Code:
wait=0
cat /dev/null >previous
while true
do
printf "%s\n" *|tail -3 >current 
diff current previous >/dev/null
if [ $? -eq  0]
     #files are the same
     let wait=wait+1
else
     wait=0
     cp current previous
fi
if [ wait -gt ?? ]   # how long do you want to wait after there are no changes in the list?
  then
   #no files have been received for wait time
   break
fi
sleep 5
done
now do your stuff

# 16  
Old 11-01-2017
Why do you need "5 last files" when that can change every moment? Why not just a representative sample?
# 17  
Old 11-01-2017
Quote:
printf "%s\n" *|tail -3 >current
This line lists the files in alphabetical order; which may not be the order that is expected.
Even using "ls -tr" will not necessarily have the last few files if the files arrive within a very short time frame.
Consider the output of the split command; 'ls ' does not always produce the same list as 'ls -tr' even though the lists should be identical.
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