awk to print the string between 3rd and 4th backslashs to end of line

Shell Programming and Scripting
1

im trying to get

awk to print the string between 3rd and 4th backslashs to end of line

test could be any word

this

http://example.com/test/ >

to this

http://example.com/test/ > test

also the other way round insert string at end of line between 3rd and 4th backslashs
thanks

2

Any attempts / ideas / thoughts from your side?

3

hi

i know how to print string to end of line like this

awk '{print $0"append_to_end"}' file > file1

but the string between 3rd and 4th backslashs is ramdom

thats where im stuck

would like to also do it the other way round

appreciate your help thanks

4

Hello bob123,

Could you please try following and let me know if this helps you.

sed 's/\(.[^//]*\)\(\/\/\)\(.[^/]*\)\(\/\)\(.[^\/]*\)\(.*\)/\1\2\3\4\5\6 \5/'  Input_file

Thanks,
R. Singh

1 Like
5

hi RavinderSingh13,

yeah that works
many thanks

i did close the space between 6 and 5 as i already had a space

sed 's/\(.[^//]*\)\(\/\/\)\(.[^/]*\)\(\/\)\(.[^\/]*\)\(.*\)/\1\2\3\4\5\6\5/' file

would you know how to do it the other way round

insert the string at the end between 3rd and 4th backslashs

6

Hello bob123,

Could you please try following and let me know if this helps you.

awk -F"/" '{print $0,$4}'   Input_file

Thanks,
R. Singh

7

hi RavinderSingh13

yeah that works the same as the sed one you posted
thanks

any way to do it the other way round

8

Hello bob123,

Could you please try following approaches too and let me know if this helps you.
Solution 1st: Using awk .

awk '{val=$0;sub(/.*com\//,"");sub(/\/.*/,"");print val,$0}'  Input_file

Solution 2nd: Using while loop here.

while IFS="/" read var1 var2 var3 var4 var5 var6
do
    echo $var1  $var2 $var3 $var4 $var5 $var6 $var4
done < "Input_file"

If you are not satisfied with these all 4 solutions(including 2 before), kindly do let me know which approach you want to solve this, may be I could try to apply logic and get it done :slight_smile:

Thanks,
R. Singh

1 Like
9

What IS "the other way round"?

10

hi rav yes very satisfied all 4 work
thank you

as for the other way round i ment

take the last string in the line and insert it between 3rd and 4th backslash

from this

http://example.com// > test

to this

http://example.com/test/ > test
11

So the 4th field (between 3rd and 4th slash) is empty?

12 
cgc6:/tmp# echo "http://example.com/test/morestuff"|./t 999 
test                                                        
http://example.com/test999/morestuff   
                     
cgc6:/tmp# cat t                                            
IFS=/                                                       
while read a b c d e                                        
do                                                          
echo $d                                                     
echo $a"/"$b"/"$c"/"$d$1"/"$e                               
done     
                                                   
cgc6:/tmp#

Simple and easy to maintain

1 Like
13

Would this come close to what you need?

echo "http://example.com// > test" | awk -F"/" '{$4 = $NF; sub (" > ",_, $4)}1' OFS="/"
http://example.com/test/ > test
1 Like
14

works great
many thanks

awk -F"/" '{$4 = $NF; sub (" > ",_, $4)}1' OFS="/" file