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I am having two file naming Extra_info and Class_info

Class_info contains data :

stuId stuName stuClass 
S01    Josh  First
S02    harsh    First
S03    Roop     Second
S04    Kali     Third

Extra_info contains extra information about student like

stuId stuCity stuEmail         stuPhone
S01    Poh  [email protected]  1234567890

I am getting result from both files using grep for stuId and displaying the result as:

res1=`grep $stuId $locDir/Class_info`
res2=`grep $stuId $locDir/Extra_info|cut -d" " -f2-` 
## also I tried res2=`grep $stuId $locDir/Extra_info|awk '{$1="" ; print $0}'`
echo $res1 $res2

Instead of displaying:

     S01 jagdeep First Sirsa  [email protected]  1234567890

It is displaying:

     Sirsa  [email protected]  1234567890

As I could think at the time of echo the variable res2 is nullifying result from res1.

Please, suggest the possible reason for this and please provide solution for the same.

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  • Works as expected for me. Have you checked if $res1 is getting correct output without print $res2? Commented Feb 19, 2014 at 16:29
  • Very strange. I tried under zsh, same result: if I store the result of 2 consecutive grep in two variables and echo them, the first is not printed. If I only echo the first, it works. If the first is assigned the result of a ls instead of a grep, it works. So the problem could be related to grep outputs? I don't understand why. Commented Feb 19, 2014 at 16:44
  • @JPG I can confirm that it works under zsh on my system as expected, ie. the results of both greps are printed. Commented Feb 19, 2014 at 16:46

2 Answers 2

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Your input files probably have CR-NL line endings, so $res1 returns the cursor to the beginning of the line then then $res2 overwrites it. Run your files through dos2unix to fix that.

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  • Yes, you got it! I am also working with a file with CR-NL, that's the reason. If I remove them, it works. Commented Feb 19, 2014 at 16:57
  • @glenn: Thanks for replying , I copied the sample content in new files and it worked. But the data is large so I have to work with same files. tried to find the suspicious extra character in the file, unable to find . Is there any command which could help to find out the culprit character Commented Feb 20, 2014 at 9:19
  • od -c filename will display the \r prior to the \n Commented Feb 20, 2014 at 12:06
  • @glennjackman : Thanks , I am able to find the character and replaced using tr command, It is working fine now. Commented Feb 24, 2014 at 10:00
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s=`grep jagdeep file1.txt |awk '{print $1}'`
egrep $s file2.txt
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