Changing user passwords

src/freedombone-controlpanel

 UPGRADE_SCRIPT_NAME="${PROJECT_NAME}-upgrade"
 UPDATE_DATE_SCRIPT=/usr/bin/updatedate
 
+# Minimum number of characters in a password
+MINIMUM_PASSWORD_LENGTH=8
+
 USB_DRIVE=sdb
 # get default USB from config file
 CONFIG_FILE=$HOME/${PROJECT_NAME}.cfg
     if [ ! $SELECTED_USERNAME ]; then
         return
     fi
-    clear
-    echo -n $"Change password for"
-    echo " $SELECTED_USERNAME"
-    echo ""
-    su -c "passwd" - $SELECTED_USERNAME
-    any_key
+
+    dialog --title $"Change password" \
+           --passwordbox $"New password for user $SELECTED_USERNAME" 8 40 2> $data
+    newpassword=$(<$data)
+    if [ ${#newpassword} -lt ${MINIMUM_PASSWORD_LENGTH} ]; then
+        dialog --title $"Change password" \
+               --msgbox $"The password should be ${MINIMUM_PASSWORD_LENGTH} or more characters" 6 40
+        return
+    fi
+
+    echo "$SELECTED_USERNAME:$newpassword"|chpasswd
+
+    dialog --title $"Change password" \
+           --msgbox $"Password for $SELECTED_USERNAME was changed" 6 40
 }
 
 function irc_set_global_password {