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How to exit from shell script if above condition fails?

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# 1  
Old 10-10-2013
Oracle How to exit from shell script if above condition fails?
HI

Code:
cd ${back_home}

if above back_home does not exist, then script shoul exit. Please let us know how to do that
Last edited by Scott; 10-10-2013 at 08:34 PM.. Reason: Added code tags
# 2  
Old 10-10-2013
Code:
[[ $? -eq 1 ]] && exit $?

Exits if previous command failed

Code:
[[ ! -d "/path/to/dir" ]] && exit 1

Exit if path doesnt exists

hth
# 3  
Old 10-10-2013
do i need to mention any if conditions?
# 4  
Old 10-10-2013
If $back_home is not defined then the command cd ${back_home} would evaluate to just cd (since "back_home" would evaluate to nothing). This would indeed take you "back home" (as in to your home directory - since cd with no arguments is equivalent to cd $HOME).

If you want to test if a variable is defined, you should use the test command!

Code:
test $back_home || exit

# 5  
Old 10-10-2013
we have $back_home variable is defined but problem is our code is like this

BACK_HOME is under NFS file system, today we have NFS file system was down
so script skips cd ${BACK_HOME} and deleted all jar files from root.

so i need to see if BACK_HOME not available then script should exit

below is the script

Code:
cd ${BACK_HOME}

# Remove old files here.
/usr/bin/find . -ctime +/-1 -name "*.jar" -print -exec /usr/bin/rm -rf {} \;

Last edited by Scott; 10-10-2013 at 08:54 PM.. Reason: Added code tags [10th time]
# 6  
Old 10-10-2013
This is a perfectly good example of how perfectly badly a question can be asked. Did you really think your problem was somehow related to that variable? Did you somehow magically expect us to work out it might have been an NFS problem?
# 7  
Old 10-10-2013
how to send email for below condition

[[ ! -d "/path/to/dir" ]] && exit 1
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