Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

Using grep in if statement

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Using grep in if statement
# 1  
Old 09-11-2006
Using grep in if statement
Can somebody please guide me towards right syntax:

#!/bin/ksh
if i = $(grep $NAME filename)
echo "Name Found"
else
echo " Name not Found"
fi

I need to grep for $NAME in the file, and if it returns false, execute a series of commands and if true, exit out.
The above is not the right syntax and need help.

Thanks
Chiru
# 2  
Old 09-11-2006
Can you please post code inside code tags? They are not very difficult to use.

As for your code, the test command will not work that way. Have you seen the ksh man page for the syntax of the if command?

Try this:
Code:
#!/bin/ksh
grep $NAME filename
if [ $? -eq 0 ]
   echo "Name Found"
else
   echo " Name not Found"
fi

The $? holds the exit status of the previously executed command. Check the man page please.
# 3  
Old 09-12-2006
with this script in first line we check if $NAME is found in file then exit.
From next line you can put your commands.
Code:
grep -Fq "$NAME" filename && exit 
# your commands here

if grep complains about -q and -F option use this
Code:
/usr/xpg4/bin/grep -Fq "$NAME" filename && exit

Last edited by Dhruva; 09-12-2006 at 07:57 AM.. Reason: code tags added
# 4  
Old 09-12-2006
Code:
#!/bin/ksh
if grep -q $NAME filename
    echo "Name Found"
else
    echo " Name not Found"
fi

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Ps -ef|grep <processname> usage in IF statement

Hi, Am working in a filenet domain where we are using AIX as our terminal to run the jobs and schedule the shell scripts to run . In my previous post regarding the "Log modification with finding errors" ... (12 Replies)
Discussion started by: Kalaihari
12 Replies

2. Shell Programming and Scripting

Using GREP in IF Statement

Hello All, I have 2 different pieces of code, I am confused why the Code1 is giving me the correct result where as the Code2 is not giving me correct result. It gives me always result as "Failure" irrespective of the "ERROR" word exists in logfile or not. may I know the reason why? I am using Bash... (17 Replies)
Discussion started by: Ariean
17 Replies

3. UNIX for Dummies Questions & Answers

Grep Segmentation Fault If statement

I receive a segmentation fault on some servers when grepping a string, but not when I use -i, and vice-versa. I have googled this and realise it is usually a hardware / memory issue. I'd like to write an if statement that says "if grep string returns 'Segmentation fault' then grep the same... (4 Replies)
Discussion started by: MaindotC
4 Replies

4. Shell Programming and Scripting

Use awk/sed/grep with goto statement!

Hi, I have an array with characters and I am looking for specific character in that array and if those specific character not found than I use goto statment which is define somehwhere in the script. My code is: set a = (A B C D E F) @ i = 0 while ($i <= ${#a}) if ($a != "F" || $a != "D")... (3 Replies)
Discussion started by: dixits
3 Replies

5. Shell Programming and Scripting

if statement with grep as conditional

Please see the script segment below for i in $files do echo $i if ; then case "$1" in "IE0263"|"IE0264"|"IE0267"|"IE0268") short_filename=`ls -l $i | cut -c108-136 | sort` ;; "IE0272"|"IE0273") short_filename=`ls -l $i | cut... (4 Replies)
Discussion started by: jmahal
4 Replies

6. Shell Programming and Scripting

sed / grep / for statement performance - please help

I'm searching the most effective way of doing the following task, so if someone can either provide a working solution with sed or one totally different but more effective then what I've got so far then please go ahead! The debugme directory has 3 subdirectorys and each of them has one .txt file... (7 Replies)
Discussion started by: TehOne
7 Replies

7. Shell Programming and Scripting

Grep statement

Hi All, Please can somebody advise that if I want to search a pattern xyz the grep command should only select xyz and not any other pattern containing xyz (ex abxyzcd) Regards (1 Reply)
Discussion started by: Shazin
1 Replies

8. UNIX for Dummies Questions & Answers

grep entire statement not just line

(extract from SQL binlog file...) # at 4960 #080801 14:35:31 server id 4 end_log_pos 195 Query thread_id=63121426 exec_time=0 error_code=0 use d_jds; SET TIMESTAMP=1217581531; UPDATE bid_details set bidding = 3170.37 ,deduction=if((3170.37 < 37.43),0,deduction) where... (3 Replies)
Discussion started by: shantanuo
3 Replies

9. Shell Programming and Scripting

Swich statement based on a grep?

I'm piping the results of a tcpdump into a shell script and want certain commands executed (specifically the firing of an SNMP alert) based on a grep for certain contents in the output of tcpdump. For example, I have #!/bin/bash while read str; do grep 'ttl 64' -q && sudo snmptrap -v 1... (2 Replies)
Discussion started by: paulobrad
2 Replies

10. Shell Programming and Scripting

Using grep in a test/if statement

Okay, well this is more or less my first attempt at writing a shell script. Anyways, here's my code: cd ${PATH} if then rm ${FILE} ./anotherScript else exit 1 fi exit 1 Anyways, it's a pretty simple script that is supposed to search for the... (4 Replies)
Discussion started by: cbo0485
4 Replies
Login or Register to Ask a Question