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Old 06-25-2010, 10:17 PM   #1
hussa1n
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Bash shell script to check the if empty files are being created & start the process


I have an Ubuntu server in which a file is dumped every hour and a new file for the next hour and the process continues. If there is any problem due to which the creation of file stops then empty files are created every minute till the process is killed & started again. I need help to make a shell script to check if the empty files are being created and then kill the process and start it again.

It would be a great help if anyone can help me regarding this.
 
Old 06-25-2010, 11:08 PM   #2
kbp
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Give this a try:

Code:
#!/bin/bash

for file in /tmp/test/*
do
        if [[ ! -s $file ]]
        then
                echo "Found zero length file"
                pkill -9 myproc
        fi
        rm -f $file
done
cheers
 
1 members found this post helpful.
Old 06-25-2010, 11:22 PM   #3
hussa1n
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Thanx for the reply @ kbp

Will this above script kill and start the process "myproc"
 
Old 06-25-2010, 11:39 PM   #4
hussa1n
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I'm kinda new to shell scripting and I don't have much idea about it. It would be a great help if you could help me.

In my scenario I need to run a script present in the home directory after th process is killed. Can I do it after changing your script as

Code:
#!/bin/bash

for file in /tmp/test/*
do
        if [[ ! -s $file ]]
        then
                echo "Found zero length file"
                pkill -9 myproc
                ./proc.sh
        fi
        rm -f $file
done
Thanks in advance.

Last edited by hussa1n; 06-25-2010 at 11:42 PM. Reason: mistake
 
Old 06-26-2010, 01:26 AM   #5
kbp
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try '~/.proc.sh' .. this is the home directory of the current user or you can use the full path .. '/home/<user>/proc.sh'

cheers
 
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Old 06-26-2010, 04:13 PM   #6
hussa1n
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Thanks kbp.
I really needed this one.
 
Old 06-29-2010, 04:20 PM   #7
hussa1n
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When is use this script everything is fine. But the problem is that all the files including data files and empty files are being removed from /tmp/test/
Code:
#!/bin/bash

for file in /tmp/test/*
do
        if [[ ! -s $file ]]
        then
                echo "Found zero length file"
                pkill -9 myproc
                /home/user/proc.sh
        fi
        rm -f $file
done
How can this script be modified in order to delete only the empty files.
 
Old 06-29-2010, 05:21 PM   #8
kbp
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Sorry.. you didn't specify that you wanted to keep the non-empty ones .. try this:
Code:
#!/bin/bash

for file in /tmp/test/*
do
        if [[ ! -s $file ]]
        then
                echo "Found zero length file"
                pkill -9 myproc
                /home/user/proc.sh
                rm -f $file
        fi
done
 
Old 06-29-2010, 05:49 PM   #9
hussa1n
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Location: India
Distribution: RHEL5, Ubuntu
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Thanks kbp. That works fine.
 
  


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