grep in the if condition


 
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# 1  
Old 12-05-2011
grep in the if condition

Hi,
In this code can able to match the pattern without case sensitive. Is that possible?
if u knw plz help me...
code:
Code:
echo "Enter name to search"
read n
if [ grep $n file ];
echo "name found"
else
echo "Not Found"
fi


Last edited by joeyg; 12-05-2011 at 11:08 AM.. Reason: Please use codetags
# 2  
Old 12-05-2011
Have you checked: "grep -i" option?

Code:
echo "Enter name to search"
read n
countFound=`grep -ic "${n}" file`
if [ ${countFound} -ne 0 ]
then
     echo "name found"
else
     echo "Not Found"
fi

# 3  
Old 12-05-2011
from the man page for grep

-i
--ignore-case
Ignore case distinctions in both the PATTERN and the input files.
# 4  
Old 12-05-2011
Quote:
Originally Posted by felipe.vinturin
Have you checked: "grep -i" option?

Code:
echo "Enter name to search"
read n
countFound=`grep -ic "${n}" file`
if [ ${countFound} -ne 0 ]
then
     echo "name found"
else
     echo "Not Found"
fi

You don't need to shove an entire command into backticks and force it to output a number to stdout just to tell if it succeeded or failed. grep, like nearly any other command, returns a code directly.

Code:
if grep -i "${n}" file > /dev/null
then
        echo "name found"
else
        echo "name not found"
fi

# 5  
Old 12-05-2011
Quote:
Originally Posted by Corona688
You don't need to shove an entire command into backticks and force it to output a number to stdout just to tell if it succeeded or failed. grep, like nearly any other command, returns a code directly.
You are right! But that is the way I like to do it! I think the code is easier to read this way! Smilie
This User Gave Thanks to felipe.vinturin For This Post:
# 6  
Old 12-05-2011
It took me a while to figure out the goal in all those options and backticks. Perhaps it seems obvious to you because putting things in backticks is how you solve most shell problems? It's not the simplest, fastest, or most direct, just the way you're used to. Hammer, nail, etc.

Last edited by Corona688; 12-05-2011 at 02:30 PM..
# 7  
Old 12-05-2011
Quote:
Originally Posted by Corona688
Perhaps because putting things in backticks is how you solve most shell problems? It's not the simplest, fastest, or most direct, just the way you're used to. Hammer, nail, etc.
I know that there are better ways (simplest, fastest, most direct, etc) to do scripting and also that the "$()" is much better than using backsticks!

But as you commented, that's the way I am used to! Smilie
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