How to block shell script from being called elsewhere other than the folder it is on?
I would like to halt my shell script if the user is currently not the shell script directory. For example, I am on the folder ~/ and call the shell script ~/shell/script.sh, the shell script should print You are not allowed to call this shell script from another folder other than its directory. But if I am on the folder ~/shell and call ./script.sh than the execution is allowed.
Why do you care what the
$PWDis? You can change directories in the script if it matters:cd "$(dirname "$0")"
It is a very local aggressive/dangerous script, so I would like the user to be present on the folder paying more attention on it when it is running the script.
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2 Answers
You can get the full path to your executing script by using realpath to resolve the implicit current directory (man realpath for details, the -P option can be useful):
mydir=$(dirname $(realpath $0))
[[ $PWD != $mydir ]] && { echo "Not in the right directory!"; exit 1; }
echo "OK, proceed..."Thanks @grawity, I wrote this:
# Call the main function, as when running from the command line the `$0` variable is
# not empty.
#
# Importing functions from a shell script
#
if ! [[ -z "$0" ]]
then # Reliable way for a bash script to get the full path to itself? # pushd `dirname $0` > /dev/null SCRIPT_FOLDER_PATH=`pwd` popd > /dev/null if[[ "$SCRIPT_FOLDER_PATH" == "$(pwd)" || "$SCRIPT_FOLDER_PATH" == "$(dirname "$0")" ]] then main "$@" else printf "You cannot run this from the folder: \n'$(pwd)'\n" printf "\nPlease, run this script from its folder on: \n'$SCRIPT_FOLDER_PATH'\n" fi
fi
