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sed doubt - search and substitute string from variable.

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Top Forums Shell Programming and Scripting sed doubt - search and substitute string from variable.
# 8  
Old 09-23-2010
Quote:
Originally Posted by dragon.1431
hi,
thanks to everyone.
i have tested pravin & franklin solution.It worked . i hope other two solutions also works.

I will be more happy if you could explain how it works ?
Code:
b=_EDITED

while read i
do
  sed "s!$i!$i$b!" input.txt > temp
  mv temp input.txt
done < read.txt

The sed code is straightforward...
Code:
sed "s!$i!$i$b!"

replaces the variable $i with $i$b.
# 9  
Old 09-24-2010
hi pravin ,franklin &rdcwayx,

i noticed one error when i tried the solution for the following input:
read.txt contains:
Code:
home/test/root1
home/test/root1_try
home/test/root1_ATB

Actual output:
Code:
make save "home/test/root1_EDITED"version="1.2"
test repo "home/test/root1_EDITED_try"version="1.2.1"
make prod "home/test/root1_EDITED_ATB"version="1.2.2"

Expected output:
Code:
make save "home/test/root1_EDITED"version="1.2"
test repo "home/test/root1_try_EDITED"version="1.2.1"
make prod "home/test/root1_ATB_EDITED"version="1.2.2"

with rdcwayx solution,actual ouput i got as follows:
Code:
make save "home/test/root1_EDITED"version="1.2"
test repo "home/test/root1_EDITED_try_EDITED"version="1.2.1"
make prod "home/test/root1_EDITED_ATB_EDITED"version="1.2.2"

i understood pravin27 logic. i didn't get the logic of using negation!Is it not something similar to grep -v?

---------- Post updated at 07:03 AM ---------- Previous update was at 06:11 AM ----------

i think i fixed it as follows:
Code:
sed  '/'$c\"'/s//'$c$b\"'/' temp_forum.txt > temp1_forum.txt

Last edited by dragon.1431; 09-24-2010 at 09:04 AM.. Reason: added the new solution
# 10  
Old 09-24-2010
MySQL
Code:
# ./justdoit file
make test "home/test1/none"version="1.3"
wt's wrong test "home/test2/abc_EDITED"version="1.0"
make save "home/test/root1_EDITED"version="1.2"
make try "home/test3/user1"version="1.4"

Code:
# cat justdoit
#!/bin/bash
sed "" read.txt | while read -r l;
 do
newl=$(echo "$l"| sed 's@/@\\/@g')
sed "s/\(.*\)\($newl\)\(.*\)/\1\2_EDITED\3/" $1 > filetmp
mv filetmp $1
 done
more $1

Last edited by ygemici; 09-24-2010 at 09:34 AM..
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