[Solved] Check for a file and keep waiting for 30 mins


 
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# 1  
Old 10-15-2012
[Solved] Check for a file and keep waiting for 30 mins

Hi All!


I want to have a shell script that checks for a file in a particular folder and then if the file is not found it should wait for 30 minutes. Again check for the file, if it FOUND then successfuly exit the shell script stating the file is found. Else it should continue to wait.



Scenario:

> data/source

if a.txt is not found in data/source folder then wait for 30 minutes and then check again the folder data/source

if a.txt is found in data/source folder then exit the script stating that file found
# 2  
Old 10-15-2012
I think you are excepting this one..
Code:
while true
do
  [ -f /home/oracle/test.txt ] && break
  sleep 2
done
ls -l /home/oracle/test.txt

This User Gave Thanks to bmk For This Post:
# 3  
Old 10-15-2012
Hi ,
Try this..
Code:
 
#!/usr/bin/ksh
while [ 1 ]
do
if [ -f /data/source/a.txt ]
then
echo " File found"
exit 0
else
sleep 30  # sleeps for 30 seconds 
echo "not found "
fi
done

Moderator's Comments:
Mod Comment code tags please

Last edited by jim mcnamara; 10-15-2012 at 10:42 AM..
This User Gave Thanks to santhoshks For This Post:
# 4  
Old 10-15-2012
doing exactly as described:
Code:
#!/bin/ksh
if [ ! -f /data/source/a.txt ] ; then
   sleep 1800  # wait 30 minutes
fi
[ -f /data/source/a.txt ]  && echo 'a.txt found' || echo 'a.txt not found'
exit 0

The best choice is to use special commands, if you have them. For example linux has the inotify api. The command inotifywait does exactly what you want and also does what the other have shown as example code. What OS do you have?
This User Gave Thanks to jim mcnamara For This Post:
# 5  
Old 10-16-2012
Thanks all , The suggested code works like a charm
 
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