import subprocess

# list_files = subprocess.run(["ls", "-l"])
# print("The exit code was: %d" % list_files.returncode)

def remove_last_line(s):
    return s[:s.rfind('\n')]


def root_user_error():
    print("You is root user. Exit")
    exit(0)


def return_current_user():
    user = subprocess.run(["whoami"], stdout=subprocess.PIPE, text=True)    
    user.stdout = remove_last_line(user.stdout)
    return(user.stdout)


# def return_home_dir():
    # user_directory = subprocess.run(["ls"], stdout=subprocess.PIPE, text=True, input="~")
    # user_directory.stdout = remove_last_line(user_directory.stdout)


def this_command_exist_or_not(command):
    result = subprocess.run([command], stdout=subprocess.DEVNULL)
    if result.stdout == "":
        return()


def main():
#   this_command_exist_or_not("lpinfo")
#   install packages from packagelist without python
    user = return_current_user()
    if user == "root":
        root_user_error()
    
    print("You are not root")
#   get printers names


if __name__ == '__main__':
    main()