print pattern between two variables awk sed


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# 1  
print pattern between two variables awk sed

I am trying to print text between two variables in a file

I have tried the following things but none seem to work:
Code:
awk ' /'$a'/ {flag=1;next} /'$b'/{flag=0} flag { print }' file

and also
Code:
sed  "/$a/,/$b/p" file

But none seem to work

Any Ideas?
Thanks in Advance

Last edited by Franklin52; 08-15-2011 at 03:39 PM.. Reason: Please use code tags for data and code samples, thank you
# 2  
Code:
awk ' /'"$a"'/ {flag=1;next} /'"$b"'/{flag=0} flag { print }' file

This User Gave Thanks to yazu For This Post:
# 3  
Thanks Yazu
This works!!!
# 4  
i guess, you need to use -v in awk for define the variable and its value and use inside the awk
# 5  
Hi itkamaraj can you give an example of how to use -v in awk?
# 6  
Like this:
Code:
awk  -va="$a" -vb="$b" 'a {flag=1;next} b {flag=0} flag { print }' file

It's more safe and less cumbersome. Of course the names of these variables (in -vVAR="$SHELL_VAR") may be any.
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