userconf-service

#!/bin/sh -e

if ! FWLOC=$(/usr/lib/raspberrypi-sys-mods/get_fw_loc 2> /dev/null); then
    FWLOC=/boot
fi

validate_user() {
    RET=0
    MSG="Entered username is invalid:"
    if [ -z "$NEW_USER" ] || [ ${#NEW_USER} -gt 32 ]; then
        MSG="$MSG\nLength be between 1 and 32 characters."
        RET=1
    fi
    if ! echo "$NEW_USER" | grep -q '^[a-z]\{1\}[a-z0-9\-]*$'; then
        MSG="$MSG\nMust only contain lower-case letters, digits and hyphens, and must start with a letter."
        RET=1
    fi
    if [ "$NEW_USER" = "root" ] ; then
        MSG="$MSG\nCannot be root."
        RET=1
    fi
    if [ "$RET" -ne 0 ]; then
        echo "$MSG"
    fi
    return "$RET"
}

validate_password() {
    if [ -z "$NEW_PASS" ]; then
        echo "Password cannot be empty."
        return 1
    fi
}

if [ "$(raspi-config nonint get_boot_cli)" -eq 0 ]; then
    INTERACTIVE=True
else
    INTERACTIVE=False
fi

for BOOT_CONF_FILE in "$FWLOC/userconf" "$FWLOC/userconf.txt"; do
    if [ ! -f "$BOOT_CONF_FILE" ]; then
        continue
    fi
    LINE="$(head -n1 "$BOOT_CONF_FILE" | dos2unix)"
    NEW_USER="$(echo "$LINE" | cut -f1 -d:)"
    NEW_PASS="$(echo "$LINE" | cut -f2 -d:)"
    if MSG=$(validate_user && validate_password); then
        INTERACTIVE=False
    else
        echo "$MSG" | tee -a "$BOOT_CONF_FILE" >&2
        mv "$BOOT_CONF_FILE" "$FWLOC/failed_$(basename "$BOOT_CONF_FILE")"
        sync
    fi
    break
done

if [ "$INTERACTIVE" = "True" ]; then
    VT="$(tty | sed 's|/dev/tty||')"
    ORIG_VT="1"
    if [ -t 0 ]; then
        chvt "$VT"
    fi
    for FAILED_BOOT_CONF_FILE in "$FWLOC/failed_userconf" "$FWLOC/failed_userconf.txt"; do
        if [ -f "$FAILED_BOOT_CONF_FILE" ]; then
            MSG="$(tail -n+2 "$FAILED_BOOT_CONF_FILE")"
            whiptail --msgbox "$FAILED_BOOT_CONF_FILE detected:\n$MSG" 20 60
            break
        fi
    done
    FIRST_USER="$(getent passwd 1000 | cut -d: -f1)"
    dpkg-reconfigure -p critical keyboard-configuration
    setupcon -k
    while true; do
        if [ "$(awk -F: '($3>=1000)&&($1!="nobody"){print $1}' /etc/passwd | wc -l)" -eq 1 ] && \
                getent passwd "$FIRST_USER" >/dev/null; then
            PREV_USER="$FIRST_USER"
            break
        fi
        PREV_USER="$(whiptail --inputbox "Which user would you like to rename:" 20 60 "$FIRST_USER" 3>&1 1>&2 2>&3)"
        if getent passwd "$PREV_USER" >/dev/null; then
            break
        else
            whiptail --msgbox "'$PREV_USER' is not a valid user." 20 60
        fi
    done
    while true; do
        NEW_USER="$(whiptail --inputbox "Please enter new username:" 20 60 3>&1 1>&2 2>&3)"
        if MSG=$(validate_user); then
            break
        else
            whiptail --msgbox "$MSG" 20 60
        fi
    done
    while true; do
        NEW_PASS="$(whiptail --passwordbox "Please set a password for $NEW_USER:" 20 60 3>&1 1>&2 2>&3)"
        if [ "$(whiptail --passwordbox "Please confirm the password:" 20 60 3>&1 1>&2 2>&3)" != "$NEW_PASS" ]; then
            MSG="Passwords did not match"
        elif MSG=$(validate_password); then
            break
        fi
        whiptail --msgbox "$MSG" 20 60
    done
    /usr/lib/userconf-pi/userconf "$PREV_USER" "$NEW_USER" ""
    echo "$NEW_USER:$NEW_PASS" | chpasswd
    chvt "$ORIG_VT"
elif [ -n "$NEW_USER" ] && [ -n "$NEW_PASS" ]; then
    /usr/lib/userconf-pi/userconf "$NEW_USER" "$NEW_PASS"
    rm "$BOOT_CONF_FILE"
fi

rm -f "$FWLOC/failed_userconf" "$FWLOC/failed_userconf.txt"