Grep var content from a file

NdAd · 12-31-2014, 05:59 AM

Hi Guys

I'm trying to grep variable content from file but for some reason it doesn't work.

I have a file , let say with sourceIP%ID,port destinationIP%ID,port :

Code:

$ cat file 
1.1.1.1%70:49513     2.2.2.2%40:6400
3.3.3.3%60:51420     4.4.4.4%30:5421
5.5.5.5%50:35784     6.6.6.6%20:5443
7.7.7.7%40:51110     8.8.8.8%10:6420

$ echo $ID
%50

$ grep "$ID" file 
$

I just want to grep the $ID from file. (I'm getting the $ID content by some other manipulation)
The thing is, when I'm doing simple assignment of ID="%50" all working properly as below.

Code:

$ ID="%50"
$ grep $ID file 
5.5.5.5%50:35784     6.6.6.6%20:5443

can someone help here please ?

danielbmartin · 12-31-2014, 06:46 AM

With InFile1 ...

Code:

1.1.1.1%70:49513     2.2.2.2%40:6400
3.3.3.3%60:51420     4.4.4.4%30:5421
5.5.5.5%50:35784     6.6.6.6%20:5443
7.7.7.7%40:51110     8.8.8.8%10:6420

... and InFile2 ...

Code:

%50

... this grep ...

Code:

grep -f $InFile2 <$InFile1 >$OutFile

... produced this OutFile ...

Code:

5.5.5.5%50:35784     6.6.6.6%20:5443

Daniel B. Martin

NevemTeve · 12-31-2014, 06:46 AM

Then the content of $ID is not what you think/see. Use program od to find out:

Code:

 printf '%s' "$ID" | od -tx1

NdAd · 12-31-2014, 08:13 AM

Quote:

Originally Posted by NevemTeve

Then the content of $ID is not what you think/see. Use program od to find out:

Code:

 printf '%s' "$ID" | od -tx1

Nice to know this. I compared the output from this tool for both options what seems different.

Anyway I digged a little deeper and found the problem.
the file I used for grep the number (50) into the var $ID contained some newlines characters CRLF. that's what mess it apparently.
I remove all these CRLF characters and now it works.

Thank you guys