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Change only first line of the match

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# 1  
Old 12-26-2013
Change only first line of the match
The below is the code which works correctly.But my requiremnt is to change only first line of the match i.e first match not whe file.

Code:
RAFTIP=rt950test.info53.com
RAFTPORT=21250
sed '5 c\
leprechaun.host.uri.list=raft' HostSocket.txt > tmp.properties
mv -f tmp.properties HostSocket.txt

LINE=`cat HostSocket.txt | grep ^leprechaun.host.uri.list=`
sed s!${LINE}!leprechaun.host.uri.list=raft://${RAFTIP}:${RAFTPORT}!g HostSocket.txt > tmp.properties
mv -f tmp.properties HostSocket.txt

file contians line like below
hostsocket.txt
Code:
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.3.uri.list=leprechaun3urilist
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist^
leprechaun.host.uri.list=raft://rt900test.info53.com:20025
leprechaun.1.uri.list=leprechaun1urilist
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.8.uri.list=leprechaun8urilist
leprechaun.9.uri.list=leprechaun9urilist
leprechaun.host.uri.list=raft://11.1.120.154:20527,raft://10.1.182.2:21527
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.6.uri.list=leprechaun6urilist


OUTPUT SHUOLD BE AS FOLLOWS:
Code:
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.3.uri.list=leprechaun3urilist
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.host.uri.list=raft://rt950test.info53.com:21250
leprechaun.1.uri.list=leprechaun1urilist
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.3.uri.list=leprechaun3urilist
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.6.uri.list=leprechaun6urilist
leprechaun.7.uri.list=leprechaun7urilist
leprechaun.8.uri.list=leprechaun8urilist
leprechaun.9.uri.list=leprechaun9urilist
leprechaun.host.uri.list=raft://11.1.120.154:20527,raft://10.1.182.2:21527
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.6.uri.list=leprechaun6urilist

Please help me in this requiremnt.
Last edited by Don Cragun; 12-26-2013 at 03:50 AM.. Reason: Add CODE tags.
# 2  
Old 12-26-2013
Change only first line of the match
Please replace your sed statement with the below
Code:
sed -r '1s!${LINE}!leprechaun.host.uri.list=raft://${RAFTIP}:${RAFTPORT}!g HostSocket.txt' > tmp.properties

the -r is extended regexp and the 1 before s is used to replace only the firt match.

Hope it works.

Cheers!!
Last edited by Franklin52; 12-26-2013 at 06:56 AM.. Reason: Please use code tags
# 3  
Old 12-26-2013
I don't understand what you're trying to do. Your current script changes line 5 in your target file so that that line and possibly others will be matched by a grep. If more than one line is matched by the grep, the second sed seems to be a no-op.

If you know that line 5 is the line you want to change, why not just make the 1st sed set that line to the final result that you want on that line and skip the second set of changes to that file?
# 4  
Old 12-26-2013
Or try removing the g from the sed statement
HTML Code:
sed s!${LINE}!leprechaun.host.uri.list=raft://${RAFTIP}:${RAFTPORT}! HostSocket.txt > tmp.properties
# 5  
Old 12-26-2013
Quote:
Originally Posted by michaelrozar17
Or try removing the g from the sed statement
HTML Code:
sed s!${LINE}!leprechaun.host.uri.list=raft://${RAFTIP}:${RAFTPORT}! HostSocket.txt > tmp.properties
Removing the g will keep the substitute command from making more than one change on a given line; it will not keep it from changing the 1st occurrence on multiple lines. With the given sample file, the g doesn't do anything.
This User Gave Thanks to Don Cragun For This Post:
michaelrozar17
# 6  
Old 12-26-2013
Like this ??? I am confused .. Smilie

Code:
$ cat file
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.3.uri.list=leprechaun3urilist
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist^
leprechaun.host.uri.list=raft://rt900test.info53.com:20025
leprechaun.1.uri.list=leprechaun1urilist
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.8.uri.list=leprechaun8urilist
leprechaun.9.uri.list=leprechaun9urilist
leprechaun.host.uri.list=raft://11.1.120.154:20527,raft://10.1.182.2:21527
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.6.uri.list=leprechaun6urilist

Code:
awk -F. '   NR!=1 && $2-p>1{ 
                             y=$0; x=$2
                             while(++p<x){gsub(/[0-9]/,p,y);print y}
                           }
                 $2~/[0-9]/{ 
                            p=$2
                           }
               !z && /host/{
                             gsub(/[://].*:/,"://"RAFTIP,$0)
                             gsub(/[:0-9]*$/,":"RAFTPORT,$0)
                             z  = 1
                           }1
        ' OFS=. RAFTIP="rt950test.info53.com" RAFTPORT="21250" file

Code:
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.3.uri.list=leprechaun3urilist
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist^
leprechaun.host.uri.list=raft://rt950test.info53.com:21250
leprechaun.1.uri.list=leprechaun1urilist
leprechaun.2.uri.list=leprechaun2urilist
leprechaun.3.uri.list=leprechaun3urilist
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.6.uri.list=leprechaun6urilist
leprechaun.7.uri.list=leprechaun7urilist
leprechaun.8.uri.list=leprechaun8urilist
leprechaun.9.uri.list=leprechaun9urilist
leprechaun.host.uri.list=raft://11.1.120.154:20527,raft://10.1.182.2:21527
leprechaun.4.uri.list=leprechaun4urilist
leprechaun.5.uri.list=leprechaun5urilist
leprechaun.6.uri.list=leprechaun6urilist

Last edited by Akshay Hegde; 12-26-2013 at 06:55 AM.. Reason: Modification...I was confused :)
# 7  
Old 12-26-2013
Quote:
Originally Posted by Don Cragun
Removing the g will keep the substitute command from making more than one change on a given line; it will not keep it from changing the 1st occurrence on multiple lines. With the given sample file, the g doesn't do anything.
Oops! I'm sorry. I must have replied without thinking twice.
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