how to tell if the shell is interactive within a ksh shell script

[curt larson]

How do you test if your shell (ksh) is interactive? i.e. the shell is attached to a teminal for i/o, such as when your logged on. And opposed to a shell being run by cron, etc.

I know there is an easier way then doing a set -o and checking if the interactive option is set to "on".

[Victor BERRIDGE · Accepted solution]

Test it:
If tty -s ....

Regards
Victor

[Brian M. Fisher]

Maybe this is what you are looking for:
Checking if shell is interactive HP document#
W3454520
http://us-support.external.hp.com/cki/bin/doc.pl/

The correct way to check if the shell is interactive (at least in ksh)
is by checking $-.

case $- in
*i*) echo interactive ;;
*) echo not interactive ;;
esac


Brian
<*(((>< er

[James R. Ferguson]

Curt:

if [ -t -eq 0 ]
then
echo "i'm interactive"
else
echo "not interactive"
fi

...JRF...