Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

Using exit status of GREP to proceed

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Using exit status of GREP to proceed
# 1  
Old 02-20-2009
Using exit status of GREP to proceed
Hi

I have a script that carries out a "grep" command, and displays the output on screen.

What I need to do is utilise the exit status of this grep, so that, for example, if it returns no entries, it asks the user if they want to set up a new user, and if the grep returns an entry, it states that the user is already set up.

Any advice would be gratefully recieved.

Regards
# 2  
Old 02-20-2009
Assuming bash here

Code:
if ! grep user /etc/passwd >/dev/null 2>&1
then
    echo "did not find user"
else
    echo "found user"
fi

 
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Want to get the exit status

Hi All, I am trying to create a zip file with all the txt files(these are in large number) in the current directory. I am able to do this operation sucessfully. After this i want to get the status of the tar command executed and do accordingly. When i am trying with the below code, the status... (3 Replies)
Discussion started by: paddu
3 Replies

2. Shell Programming and Scripting

Perl Question Grep and exit status

Im being forced to write in perl. I prefer KSH or Expect, so I suppose its time to become more fluent with perl. I have the following problem. I want to loop through Filea and check that each line in Filea is resident in Fileb. Filea contents two four six eight houseboat Fileb... (4 Replies)
Discussion started by: sumguy
4 Replies

3. Shell Programming and Scripting

Exit Status

I have a shell script (#!/bin/sh) that interacts with Appworx and Banner Admin. In my script I want to check the exit status of awrun before continuing. awrun can run for 10 seconds or it can run for over a minute. So my question is, will it go through my if statement before awrun may even be... (2 Replies)
Discussion started by: smkremer
2 Replies

4. Shell Programming and Scripting

Exit status of grep

I am trying to get the exit status of grep and test a condition with it, But it does not seem to be working as expected since i am doing something wrong apparently as per grep help Exit status is 0 if match, 1 if no match, and 2 if trouble. My problem is something like this templine - a... (7 Replies)
Discussion started by: prasbala
7 Replies

5. Shell Programming and Scripting

Check for exit status

Hi I have following code I want If whole code executes successfully then return true If found any error then print the error I tried if ; then But this checks only for the just upper line execution #!/bin/bash PATH1=/var/log/mysql PATH2=/home/ankur/log FILE1=mysql-bin.index... (4 Replies)
Discussion started by: kaushik02018
4 Replies

6. Shell Programming and Scripting

Exit status

I'm preparing for exam and one of exams is to write own test command... I wonder if in unix is a command which just returns exit code you specify.. I know I can easily write a function like this: exStatus() { return $1 } -> my question is rather theoretical thank you! (9 Replies)
Discussion started by: MartyIX
9 Replies

7. Shell Programming and Scripting

How to get the exit status

Hi all, I'm running a program which return 1 upon success. But when encounters problem shell return 's '1' . How to differentiate between them the shell return value and script return value. Ex. function fn return '1' if executed successfully and '0' if failed. But when if shell encounters... (1 Reply)
Discussion started by: yhacks
1 Replies

8. Shell Programming and Scripting

exit status for isql

I'm trying to write a script that will update a table in sysbase. If it's failed then I want to rerun it one more time before exiting the script (fail due to bad value such as trying to put a string into datetime field or bad connection to the database) Well my code below will always return... (2 Replies)
Discussion started by: sirrtuan
2 Replies

9. Shell Programming and Scripting

exit status

i downloaded a text file from metalab.unc.edu called sh.txt and in this reference manual it refers to shell scripting exit status .. at the end of one of the examples that author gave an exit status of 127.. to what does a 127 exit status refer too and what is its purpose in the code. moxxx68 (1 Reply)
Discussion started by: moxxx68
1 Replies

10. UNIX for Advanced & Expert Users

ftp exit status.

Does ftp from unix have an exit status. In the sense after ftp is invoked and if the ftp fails during file transfer does it exit out with a status other than 0. What is do right now is invoke ftp and right it to a log and then grep for 'File Transferred Sucessfully'. Is this the only way to do it... (1 Reply)
Discussion started by: oracle8
1 Replies
Login or Register to Ask a Question