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Recursively grep for a pattern and print that whole word

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# 1  
Old 05-12-2016
Recursively grep for a pattern and print that whole word
Hello Forum Members,

I am trying to write a script for a requirement where i have to recursively search for a pattern and replace it with the new string in run time from user inputs
Code:
 grep -ohr "[[:alpha:]]*.xyz.com[[:alpha:]]*" $HOME/source/group/ | sort | uniq  > $HOME/output.txt
  while read -r -u9 line;
  do
     echo "The URL that should have to be changed is $line ..., Please enter the new URL  "
     read $user_url
     echo " User Entered URL is $user_url ..."
     echo ""
     echo " Changing URL from $line to $user_url ..."
     grep -irwl '$line' $HOME/source/group/ | xargs sed -i 's/$line/$user_url/g'
  done 9< $HOME/output.txt;

but the issue with the above is

Code:
grep -ohr "[[:alpha:]]*.xyz.com[[:alpha:]]*" $HOME/source/group/ | sort | uniq  > $HOME/output.txt

this grep only prints for entries with *.xyz.com ( ex:abc.xyz.com) but i also have some entrites as dev-abc.xyz.com but it is getting them

Can some one please suggest me a better way to grep for all the entries




Moderator's Comments:
Mod Comment Please use code tags as required by forum rules!
Last edited by RudiC; 05-12-2016 at 01:46 PM.. Reason: Added code tags
# 2  
Old 05-12-2016
What happens if you
- leave out the -o option
- add a - to the regex (like [-[:alpha:]])
# 3  
Old 05-12-2016
Hello RudiC,

Thank you for the response , As per your suggestion i have tried below

Code:
grep -hr "[-[:alpha:]]*.xyz.com[[:alpha:]]*" $HOME/source/group/ | sort | uniq  > $HOME/output.txt

I should have informed in my original posting my bad , but there are 100's of xml files inside group folder/subfolders so with the above command it prints the entire date in the tags of the XML file and not the actual URL that is required.

I have also tried below

Code:
grep -ohr "[-[:alpha:]]*.xyz.com[[:alpha:]]*" $HOME/source/group/ | sort | uniq  > $HOME/output.txt

the above nearly gets all the information that i need it prints

Code:
dev-abc.xyz.com
qa-def.xyz.com
rty.xyz.com

But the only issue is we have some URL's like dev1-tyu.xyz.com and qa1-opt.xyz.com , It does not get them properly, it gets them as
Code:
-tyu.xyz.com
-opt.xyz.com

can you please help in addressing the above as well.
Last edited by Don Cragun; 05-13-2016 at 01:30 AM.. Reason: Add CODE tags again.
# 4  
Old 05-13-2016
Code:
grep -ohr "[-[:alnum:]]*\.xyz\.com"

A . (dot) does match a literal dot, but also any character except the newline. If you want to match a literal dot you need to escape it.

Substituting [:alpha:] for [:alnum:] will include digits.

You do not need the last trailing [:alpha:]*

This is not, by any means, fool proofed, since you keep showing us different information on each post on what to match.
# 5  
Old 05-13-2016
With the -o option the trailing [:alpha:]* makes a difference:
it shows a hostname rty.xyz.comx in full length.
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