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Shell Programming and Scripting

How to quit from a script?

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Top Forums Shell Programming and Scripting How to quit from a script?
# 1  
Old 01-29-2010
How to quit from a script?
hi all,

I am facing problem in shell scripting while using exit command, when ever i run a file using . ./<filename>, when i run the sae script as sh <filename> the script does not close the windows. since my script has function calls i have to use . ./ <filename>.

Could any one tell me where i am going wrong?

Thanks
# 2  
Old 01-29-2010
Post the script here.
# 3  
Old 01-29-2010
When you use 'sh script' you're invoking another shell to run the script while '. ./script' uses the current shell to parse the script.
# 4  
Old 01-29-2010
sorry for the slight delay, had to write a new one to give it to you all. this is in essence the logic of my script.

Code:
function hello
{
echo "testing exit"
res=$?
return $res
}
# main
hello
if [ $res -eq 0 ] ; then
exit 1;
fi

Last edited by pludi; 01-29-2010 at 03:59 AM.. Reason: code tags, please...
# 5  
Old 01-29-2010
The debug code is self explanatory

Code:
% ksh -x hello.sh
+ hello
testing exit
+ [ 0 -eq 0 ]
+ exit 1

sh
Code:
sh -x hello.sh
+ function hello
hello.sh: function: not found
+ echo testing exit
testing exit
res=0
+ return 0
hello.sh: cannot return when not in function

# 6  
Old 01-29-2010
I am well aware of the useage of sh and . ./ when i use exit 1 without a function call and run the script, the script doesnt close the putty session, however when i run the script with a function and now i use . ./ the script closes the putty session.

How could I avoid it?

Thanks.
# 7  
Old 01-29-2010
This is by design. The script is not supposed to close your putty session (it closes its own subshell). If you are sourcing the script (using . ) then it is, since you are calling exit in your current shell environment so it will close that.
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