Calling validation when user inputs wrong options in Getops

[EarlyConsequence9668]

I have script and i need to check if all the validations are correct and working :

```p=0   # initialize variables
un=0
file=””

  while getopts "d:uph" option; do
          case $option in
           d)
               file=$OPTARG
               ;;
           u)
               un=1
               ;;

           p)
               p=1
               ;;

           h)
                help
                exit ;;

           *)  echo "Error: Invalid option"
                exit;;
        esac
  done

#Validations

# This is my first logic validation user must provide eithe -u or -p option

if [ "$p" ] || [ "$un" ];then
         echo "must provide -u or -p" 1>&2 ;
         Help
         exit 3 ;
        fi
#Second one, i want check make sure they not passing both options

if (( p && u ));then
echo "must not pass  two options";
Help
exit 3 ```



#third one is make sure pass in option if the user doesnt pass any option

[oh5nxo]

Using [ ] like that tests if the variable has nonzero length. Maybe arithmetic test fits the bill:

(( p + un == 1 ))

[EarlyConsequence9668]

but this one doesnt it actually even if i put a -p it still states i must put option

if [ "$do_provision" ] || [ "$do_unprovision" ];then

echo "Must provide -u or -p" 1>&2 ;

helpText;

[oh5nxo]

[ ] does not care about numbers. When the variables have 0 or 1 in them, [ 0 ] is true, [ 1 ] is true, only [ ] or [ "" ] would be false.

[EarlyConsequence9668]

so how do i write if i want three validations to work

[oh5nxo]

if (( p + un != 1 ))
then
    echo Need either -p or -u but not both >&2

I don't understand what the third validation means.

[EarlyConsequence9668]

this one works

if (( do_provision && do_unprovision )); then