Shell Programming and Scripting

Hello Folks,

Looking for a script which can keep doing ls to the directories and once file landed to the directory then ,read the files do further calculation and exit.

Kindly guide.

Regards,
Sadique

Do not write a long running script; instead create a cron job that runs as frequently as you deem appropriate.
Have the cron job create a lock file when it starts and delete the file when it is complete.
Have the cron job test for the existence of the lock file when it starts, and if present, exit with a message that the previous invocation did not finish normally. It may be that enough files were received that the process time exceeds the cron interval, or it may be that the process has terminated abnormally or stopped waiting for user input.
Make sure that you only process files that have been completely received. Unlike Microsoft operating systems, files appear in 'ls' lists when they are opened not when they are closed.

In my environment



On every 5 mins the directory have the files ,stay there for 1-2 mins and processed.

I want to write a script which run on every hour for 5 mins to and keep looking for the the if it found then do further calculation as a part of my requirement and exit.


Kindly guide how can i loop ls to the directory and keep checking the files if it found apply the next logic else keep looking till it not found. Once found it should come out of the condition and exit.

This is possibly a duplicate posting to the thread

Script to check the files existence inside a directory.

which already has an answer.