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Shell Programming and Scripting

Working on Files

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# 1  
Old 12-27-2011
Working on Files
Hi,

One of the program creating a file with the following information.

$cat a.txt
1, AAA, 234
$

and I wrote a script whenever any of the the file exists with data then it will send a email to me.

If I start the job second time, then the as per the logic it is sending the same data, I would like to write a script which will check if the same data is already sent in the previous mail then it should ignore and if any of the new records exists in the file then only the mail should go to the concerned person.

could you please help me on this.

I believe, after generating the file I may have to take the copy of this file into one more directory and I have to compare the data with previous file, I tried my ways but didn't worked. appreciate if you could help me on this.
# 2  
Old 12-27-2011
believe, after generating the file I may have to take the copy of this file into one more directory and I have to compare the data with previous file

Code:
 
diff a.txt /another/dir/a.txt && echo "No difference" || echo "Different"

Code:
#end of your script
cp a.txt /another/dir/a.txt

# 3  
Old 12-27-2011
one way:

Store the filesize in a temp file on each run.
On next run, read the filesize and compare with the current file.
If filesize same, dont send mail, else proceed further.
# 4  
Old 12-27-2011
Thank you for your reply.

Imagine if the file size is different but there may be chance that any of the record I may received from previous file.
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