Here’s a bash script that meets your requirements:

```bash #!/bin/bash

Function to check if a program has a password

has_password() { program=$1 password_file=”.${program}_password”

if [ -f "$password_file" ]; then
    return 0
else
    return 1
fi }

Function to get password from user

get_password() { program=$1 password_file=”.${program}_password”

echo "Enter password for $program:"
read -s password

echo "$password" > "$password_file"
echo "Password set successfully!" }

Function to validate password

validate_password() { program=$1 password_file=”.${program}_password”

echo "Enter password for $program:"
read -s password

stored_password=$(cat "$password_file")

if [ "$password" == "$stored_password" ]; then
    return 0
else
    return 1
fi }

Function to change password

change_password() { program=$1 password_file=”.${program}_password”

echo "Enter new password for $program:"
read -s new_password

echo "$new_password" > "$password_file"
echo "Password changed successfully!" }

Main script

program=”firefox”

if has_password “$program”; then if validate_password “$program”; then echo “Password is correct.” echo “1. Change password” echo “2. Run $program”

    read -p "Enter your choice: " choice

    case $choice in
        1)
            change_password "$program"
            ;;
        2)
            echo "Running $program..."
            # Add command to run the program here
            ;;
        *)
            echo "Invalid choice!"
            ;;
    esac
else
    echo "Incorrect password. Exiting..."
    exit 1
fi else
echo "No password set for $program."
echo "1. Run $program"
echo "2. Set password"

read -p "Enter your choice: " choice

case $choice in
    1)
        echo "Running $program..."
        # Add command to run the program here
        ;;
    2)
        get_password "$program"
        ;;
    *)
        echo "Invalid choice!"
        ;;
esac fi ```

To use this script, save it to a file (e.g., program_runner.sh), make it executable (chmod +x program_runner.sh), and then run it (./program_runner.sh). Replace firefox with the name of the program you want to run.

Note: This script assumes that the program’s password is stored in a hidden file named .program_password in the same directory as the script. You can modify the script to change the password file location if needed.