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SED:: Using variable while grouping

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# 1  
Old 06-11-2010
SED:: Using variable while grouping
Hi,
I have the following script :-

Code:
#!/bin/csh -f
set var="HOST2"
sed -e 's/\(.*TRANSFER TO\).*\(usr\)/\1 "$var" \2/' tempFile

tempFile contains:

Code:
STOP TRANSFER TO HOST1             /usr/bin/myscript

1. How to use variable in the above sed command. It replaces with $var instead of HOST2

2. In the second grouping while replacing, the "/" from usr is gone, how to handle that?

Thanks
Last edited by angshuman_ag; 06-11-2010 at 01:10 PM.. Reason: Typo correction
# 2  
Old 06-11-2010
Try
Code:
sed -e "s/\(.*TRANSFER TO\).*\(\/usr\)/\1 $var \2/"

To "translate" $var into it's value
To also pick the slash "/" from usr
This User Gave Thanks to pseudocoder For This Post:
angshuman_ag
# 3  
Old 06-11-2010
Thanks AGAIN to you for solving my issue Smilie
# 4  
Old 06-11-2010
No problem. You're welcome. I'm glad it worked Smilie
# 5  
Old 06-28-2010
Hi,
One issue here.
This line

Code:
STOP TRANSFER TO HOST1             /usr/bin/myscript

is like this

Code:
"STOP TRANSFER TO HOST1"             /usr/bin/myscript


So, the sed command removes the closing quotes. How do I preserve that ?
# 6  
Old 06-28-2010
Code:
sed -re "s|(.*TRANSFER TO +).*(\"? +(/usr)|\1$var\2|"

in this case, i use extended regexp (sed -re)
The first set of parenthesis goes from the beginning of the line to TRANSFER TO including following spaces (...TO +).
The second set goes from a possible quote (\"?) to /usr including spaces in between.
Ask me if it's not clear
Last edited by chebarbudo; 06-28-2010 at 07:23 AM.. Reason: using Scrutinizer's good idea (s|...|...| instead of s/.../.../)
# 7  
Old 06-28-2010
Code:
sed "s|\(TRANSFER TO\).*\"|\1 $var\"|"

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