Shell Programming and Scripting

i have a bit of a unique question. is there a way to know if a script is being run from from the command line or from another script?

example:

Code:

command line:

### ./autorun.sh
ERROR: not permitted to run script from the commandline. exiting...

but if i put "autorun.sh" into another script and call it "master.sh", i want the master.sh script to know when the user is using the "master.sh" script itself to run the "autorun.sh" and when the user decides to run the "autorun.sh" separately.

the preference here is to prevent the user from runnign the the autorun.sh separately. but i'm lost as to what i can use to identify when it is being run from the command line or through the master.sh script.

os: linux/sunos
shell: bash

Try this:

Code:

$ cat master.sh
./autorun.sh &
wait

Code:

$ cat autorun.sh
if tty -s
then
        echo "ERROR: not permitted to run script from the commandline. exiting..."
        exit 1
fi

this works beautifully. one last question,

if i wanted to make it so a script can only be run by one particular user, is that possible? meaning in addition to what you posted, can something be worked into the script to make it so that, for instance, userA is the only person that can run a script. meaning, userA has to be logged into the system, not some other user who "su -" to become userA.

Note: tty -s has been deprecated. An alternative is:

Code:

if [ -t 0 ]; then
  echo "ERROR: not permitted to run script from the commandline. exiting..."
  exit 1
fi

Code:

user=$( who am i )
user=${user%% *}
[[ "$user" != "SkySmart" ]] && exit 1