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Extracting substring from string

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# 1  
Old 04-14-2010
Extracting substring from string
Hi awk and sed gurus,

Please help me in the following.

I have the following entries in the file

Code:
ABCDErules
AbHDPrules
ABCrules

--
--

and other entries in the file.

Now, I want to extract from the file that contain entries for *rules and process it separately.
How can i do it with sed or awk command. Please help.

-San
Last edited by radoulov; 04-14-2010 at 04:58 AM.. Reason: Please use code tags!
# 2  
Old 04-14-2010
Do you want to filter the lines which contains "rules"?
Please post the expected output from the above sample. and how do you want to process them.
# 3  
Old 04-14-2010
hi use following :

Code:
for i in `grep 'rules$' filename`
do
......
......
done


Hope this is what u are looking for...
Last edited by Reboot; 04-14-2010 at 03:33 AM..
# 4  
Old 04-14-2010
Quote:
Originally Posted by anchal_khare
Do you want to filter the lines which contains "rules"?
Please post the expected output from the above sample. and how do you want to process them.
I want to extract this output to some variable and process one by one using for loop.
ABCDErules
AbHDPrules
ABCrules
# 5  
Old 04-14-2010
Code:
awk '/rules$/ { -- process for each line here -- }' file

or,

Code:
while read line
do
 found=$(echo $line | grep 'rules$')
 if [ "$found" ]; then
  # do process
 else
  echo 'no found'
 fi
done < file

# 6  
Old 04-14-2010
or grep/awk/sedless:
Code:
while read line
do
 case $line in 
   *rules) echo "$line"
 esac
done < infile

# 7  
Old 04-20-2010
@ Scrutinizer and @ anchal_khare

Thanks a lot, it worked with little modification. Since i don't want full line. just only the first field. so i printed the first field after filtering the entire line.
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