uf-first-setup.sh

# Written by Mikhail P. Ortiz-Lunyov
#
# Updated May 21st 2024
# This script is licensed under the GNU Public License Version 3 (GPLv3).
# More information about license in readme and bottom.

# Checks for root user
RootCheck() {
    # Checks whoami
    case `whoami` in
        "root")
            echo "Script run as root..."
            ;;
        *)
            # Alerts user to lack of root execution
            printf "\e[1mMISSING ROOT!\e[0m\n"
            # Gives user advices for intended use
            echo "Update_Full is intended to be used by sysadmins and others authorized to update Linux and UNIX-based systems."
            echo "As such, it is best for the script to have limited writing and executing permissions."
            echo "This first setup script changes the script's permission."
            printf "\nAs such, this script needs to be executed as root to improve the update_full's permissions.\n"
            exit 1
            ;;
    esac
}

# Sets default (root) settings
DefaultSettings() {
    # Sets owner
    OWNERNAME="root"
    # Sets group
    GROUPNAME="root"
    chown $OWNERNAME:$GROUPNAME $SCRIPTNAME
    chmod 744 $SCRIPTNAME
}

# Sets custom settings for chown
CustomChown() {
    # Starts loop
    Q_LOOP1=true
    while [ "$Q_LOOP1" = true ] ; do
        printf "File owner name: "
        read OWNERNAME
        printf "File group name: "
        read GROUPNAME
        chown $OWNERNAME:$GROUPNAME $SCRIPTNAME
        if [ "$?" != "0" ] ; then
            clear
            echo "Something went wrong, try again!"
        else
            Q_LOOP1=false
        fi
    done
}

# Sets custom settings for Chmod
CustomChmod() {
    # Starts loop
    Q_LOOP2=true
    while [ "$Q_LOOP2" = true ] ; do
        printf "Owner rights code: "
        read OWNERRIGHTS
        printf "Group rights code: "
        read GROUPRIGHTS
        printf "Others rights code: "
        read OTHERSRIGHTS
        chmod $OWNERRIGHTS$GROUPRIGHTS$OTHERSRIGHTS $SCRIPTNAME
        if [ "$?" != "0" ] ; then
            clear
            echo "Something went wrong, try again!"
        else
            Q_LOOP2=false
        fi
    done
}

# Main
clear
# Runs Root check function
RootCheck
SCRIPTNAME="update_full-unix.sh"

# Start default check loop
DEFAULT_Q_LOOP=true
while [ "$DEFAULT_Q_LOOP" = true ] ; do
    echo "Do you want to use defaults ($SCRIPTNAME is owned by root, $SCRIPTNAME can only be read, writen, and executed by user (root), and read by everyone else)?"
    echo "!!!RECOMMENDED!!!"
    printf "[Y]es/[N]o < "
    read DEFAULT_Q
    case $DEFAULT_Q in
        "Y"|"y"|"Yes"|"yes")
            DefaultSettings
            DEFAULT_Q_LOOP=false
            ;;
        "N"|"n"|"No"|"no")
            Q_LOOP0=true
            while [ "$Q_LOOP0" = true ] ; do
                echo "What do you want to change?"
                printf "\t[1] chown (change file owner and group)\n"
                printf "\t[2] chmod (change file mode bits)\n"
                printf "\t[3] Both\n"
                printf "\t[4] Use defaults instead\n"
                printf " < "
                read Q_0
                case $Q_0 in
                    "1")
                        CustomChown
                        ;;
                    "2")
                        CustomChmod
                        Q_LOOP0=false
                        ;;
                    "3")
                        CustomChown
                        CustomChmod
                        Q_LOOP0=false
                        ;;
                    "4")
                        DefaultSettings
                        Q_LOOP0=false
                        ;;
                esac
            done
            ;;
        *)
            clear
            echo "Invalid response, try again."
            ;;
    esac
done

# Notifies user to changed permissions
printf "\n\e[1mPermissions changed for $SCRIPTNAME!\e[0m\n"
# Describes changes
echo "$SCRIPTNAME's owner is now '$OWNERNAME' in group '$GROUPNAME'."
printf "This first-setup script will now delf-destruct.\n\tIf you need different permissions and ownership, change it manually!\n"
rm -f $0
exit 0

# uf-first-setup.sh  Copyright (C) 2024  Mikhail P. Ortiz-Lunyov
#   This program comes with ABSOLUTELY NO WARRANTY.
#   This is free software, and you are welcome to redistribute it
#   under certain conditions.