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tty command failing

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# 1  
Old 11-18-2009
tty command failing
We have script like this in the .bash_profile..

Code:
#-# determine if session is interactive or in background
if [[ "$(/usr/bin/tty -s)" -eq 0 ]]; then
   while true; do
    	read -p "Do you wish to load profile yes or no?" yn
    	case $yn in
        	[Yy]* ) source /opt/oracle/.profile; break;;
       		[Nn]* ) break;;
        	* ) echo "Please answer yes or no.";;
    	esac
   done
else
 echo "session running in background returns $?" > /tmp/D.txt
fi

what we are trying to do is , if it 's interective session load profile other wise ignore it ( some times we will restart the system and if it's not interective) . This is code looks good and not working . any ideas ....

Thanks
# 2  
Old 11-19-2009
Quote:
Originally Posted by talashil
We have script like this in the .bash_profile..

Code:
#-# determine if session is interactive or in background
if [[ "$(/usr/bin/tty -s)" -eq 0 ]]; then


The tty -s command doesn't output anything, so there is nothing to compare. You want to compare the return code, not the output:

Code:
if tty -s; then

Better yet, you can use the test command which is a shell builtin:

Code:
if test -t 0 ; then

Quote:
Code:
   while true; do
    	read -p "Do you wish to load profile yes or no?" yn
    	case $yn in
        	[Yy]* ) source /opt/oracle/.profile; break;;
       		[Nn]* ) break;;
        	* ) echo "Please answer yes or no.";;
    	esac
   done
else
 echo "session running in background returns $?" > /tmp/D.txt
fi

what we are trying to do is , if it 's interective session load profile other wise ignore it ( some times we will restart the system and if it's not interective) . This is code looks good and not working . any ideas ....

Thanks
# 3  
Old 11-19-2009
Thankyou
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