## SICS Options and Users

The SICS server has an internal options database which holds such values as port number to listen too and the like. Additionally there exists a user database. Currently these values are configured from the initialisation file. The commands to do this are:

- ServerOption name value defines the server option name to be value.
- SicsUser name password accesscode defines a user with name and password and an access right accesscode. Accesscode is an integer from 1 to 3 for User, Manager and Spy rights. A user with Spy right may look at everything but cannot change anything. A user with user privilege may change most of the SICS parameters, perform measurements etc. A user with manager privilege may do everything to the system.

The Sics server currently uses the following options:

- ReadTimeOut The server checks in each cycle of the main loop fro pending commands. Het waits for new commands for a specific period of time. This value is the ReadTimeOut. It should be as short as possible. This value may need to be increased if there are network performance problems. A good value is 100.
- ReadUserPasswdTimeout This is the time a client has to send a username password pair after a connection request. If nothing comes in in that time, the connection request is terminated.
- LogFileBaseName defines the path and the base name for the server log file.
- ServerPort defines the port number the server is listening to. Should be greater than 1024 and less than 64000. The port number should also be different from any other server port number in use on the system. Otherwise evil things may happen.
- InterruptPort The SICS server can handle interrupts coming in as UDP messages on a special port. This option defines this UDP port number. The choice of possible port numbers is limited by the constraints given above in the ServerPort section. Espacillay this port number MUST be different from the ServerPort number. The UDP messages accepted are expected to consist of the string SICSINT followed by an interrupt number. For interrupt numbers see file interrupt.h.
- DefaultTclDirectory specifies where Tcl defined commands are stored. When this is properly defined Tcl will autoload commands.
- StatusFile defines the file to which he current state will be saved on close down of the server and restored from at startup time.
- TelnetPort The port number where the SICS server will be listening for telnet connections. If this option is missing login via telent to the SICS server is disabled.
- TelWord In order to login to SICS via telnet a magic word is needed. The login word, This option defines this word. If this option is missing telnet login to SICS is disabled.
- LogFileDir This server option defines the directory where commandlog log files are kept.