Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

diaplaying the grep result

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting diaplaying the grep result
# 1  
Old 03-27-2008
diaplaying the grep result
Hi,
My code is like this

Code:
if swlist -a revision 2>/dev/null | grep ABC 2>/dev/null  
then
		
     echo "Found  Above mentioned ABC Version, please remove it first..." 
fi

This is displaying the result to the screen.

i want to first suppress that and for that i wrote the below code
Code:
if swlist -a revision 2>/dev/null | grep ABC 2>/dev/null  > /dev/null
then
	$temp=swlist -a revision 2>/dev/null | grep ABC 2>/dev/null  	
     echo "Found  $temp ABC Version, please remove it first..." 
fi


But it is not working .... can any one help me???

Thanks
# 2  
Old 03-27-2008
The syntax of the assignment is all wrong. But you can avoid running the thing twice. This is one of the few situations where really you want to execute a command first, and then examine its exit code in $?

Code:
temp=`swlist -a revision 2>/dev/null | grep ABC` # note backticks, not regular quotes
case $? in 0) # grep succeeded, meaning it was found
    echo Found $temp ABC version, please remove it first ... >&2 ;;
esac

I took the liberty of removing the 2>/dev/null from grep, because I don't see how it could produce an error.
Last edited by era; 03-27-2008 at 03:39 AM.. Reason: Had inverted the success condition, oops
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Grep result from dd command

Hi, I am running following command in a bash script for testing IO and use grep to get throughput number, but it did not work, it displayed everything: dd if=/dev/zero of=/dev/null bs=1G count=1 oflag=dsync | grep bytes | awk '{print $7}' 1+0 records in 1+0 records out 536870912 bytes... (2 Replies)
Discussion started by: hce
2 Replies

2. UNIX for Dummies Questions & Answers

Bash - CLI - grep - Passing result to grep through pipe

Hello. I want to get all modules which are loaded and which name are exactly 2 characters long and not more than 2 characters and begin with "nv" lsmod | (e)grep '^nv???????????? I want to get all modules which are loaded and which name begin with "nv" and are 2 to 7 characters long ... (1 Reply)
Discussion started by: jcdole
1 Replies

3. Solaris

grep result in newline

Hi While trying to do a search on solaris, the grep results seems to be appearing on the same line instead of the new line. Wed Jan 18 14:45:48 weblogic@test:/abcd$ grep qainejb02 * qa_cluster_biz_view_tc_intl_servers_ports_2:qainejb02 7101 qa_cluster_servers_2:qainejb02... (2 Replies)
Discussion started by: ganga.dharan
2 Replies

4. UNIX for Dummies Questions & Answers

grep, expecting 1 result, getting more

Hi Please take a look below, I'm grepping for /app/oracle and would like explicitly that result and not /app/oracle/admin as well. # cat /tmp/fs.list /app/oracle /app/oracle/admin # cat /tmp/fs.list | grep -w "/app/oracle" /app/oracle /app/oracle/admin (3 Replies)
Discussion started by: s1ckle
3 Replies

5. Shell Programming and Scripting

pipe result from grep

Trying to create a command line script to look for all files matching a pattern, grep for a specific value in each file, and write out the filename long list. It's possible the filename won't containe the value. { echo “Running....” for fname in 811_Intermediate_File_* do grep -l... (3 Replies)
Discussion started by: gavineq
3 Replies

6. UNIX for Dummies Questions & Answers

omit strings from grep result

Hi, I know this is a really dumb question, and I used to know how to do this, but I forgot and I can't seem to find the command online anywhere: When I grep a string, how do I filter the results so that lines containing a certain string are OMITTED! for example: grep 'string' *.txt ... (2 Replies)
Discussion started by: juliette salexa
2 Replies

7. Shell Programming and Scripting

How to negate grep result?

Here is my script so far: set dirs = ` find . -name "message.jar" 2> /dev/null | cut -d "/" -f 2 ` | uniq foreach dir ( $dirs ) if (grep $dir/* someText==null) --> how do I write this in script? print $dir end end (4 Replies)
Discussion started by: mmdawg
4 Replies

8. UNIX for Dummies Questions & Answers

grep to handle a 0 result

Hi guys, I have the following grep command in a script to search through a file for a string and return its count, and it works fine for when the string exists: grep "string" file.txt | wc However, sometimes the result will be 0 and I want the script to take this as the result. Right now... (6 Replies)
Discussion started by: ocelot
6 Replies

9. UNIX for Dummies Questions & Answers

To have a numeric result from grep

I am new to unix. i need to know how to use grep to grep and expression from a file. and pass the result as a 0 for found and 1 for not found. I can only go up to grep 'Checking Subscription Status' ranos.log. Please help. Thank you. (2 Replies)
Discussion started by: Hak Dee
2 Replies

10. UNIX for Dummies Questions & Answers

is there any why to get the number of line in grep result ?

Hello all when I do simple grep on file im getting the results of "filename : stringResult " is there any way to present also the line number in the file ? (1 Reply)
Discussion started by: umen
1 Replies
Login or Register to Ask a Question