Run script if new file exists.

Shell Programming and Scripting
1

Is there any way to have a script run (either on a web page or a shell script) when new files are put in a folder. E.g we have order response notification XML files uploaded to our server. They are uploaded via sftp. What i wondered if there was some way to monitor the contents and if new files with the correct extesions are uploaded then a script would run to process them.

Or maybe i should just use a daily cron if all else fails?

2 
 
 
if [ -f "$file_name" ]; then
 
echo "file exists"
 
ls -l "$file_name" | grep "permissions" 2>/dev/null
 
if [ $? -eq 0 ]; then
 
echo "proper file present"
 
## proceed with the steps needed
 
fi
 
fi
3

I don't understand how would this script get run? Need it to run automatically when a folder is uploaded, thx

4

First start off by creating the .toc file toc=table of contents

ls -tl <your directory> > <your directory>/.toc

Next create a script that does the following:

ls -tl <your directory> > /tmp/.toc # or what ever dir you want just make
# sure your not overwriting
# the current .toc file.

diff /tmp/.toc <directory with orig>/.toc > /dev/null 2>&1
if [$? -ne 0 ]
then # something changed
mv /tmp/.toc <directory with orig>/.toc
Do the rest of your processing
....
.....
.....
.toc
else
echo "No changes"
fi

Note: I prefernce .toc with the "." so a simple ls command will not pick
it up. You can run this as often as you like.

Good luck

5

ah ok so maybe run that every 10 mins or so. Thanks