Product Documentation

FairCom ISAM for C

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Users, Groups, and Passwords

System Administrator

The FairCom Server comes with a System Administrator utility program, as described in the FairCom Server documentation. This utility performs a number of security related tasks.

User ID

When using the FairCom security feature, each user that will use the FairCom Server must be given a User ID by the System Administrator. The ID is a 32-byte ASCIIZ string (i.e., a null-terminated ASCII string), which implies 31 bytes are available for the User ID.

User Password

Each User ID can have an optional user password. The password limit is 64-bytes. For more about passwords, see Automatically Enforce Password Strength.


The System Administrator will create one or more Groups. Each group is assigned a unique Group ID that is a 32-byte ASCIIZ string.

To provide a convenient way to permit users with related needs to share information, each user is assigned membership in from one to sixteen groups. The Administrator adds the groups to the system and assigns users to the groups. Each user has a default group, which counts as one of the user’s sixteen groups. If a user is not assigned to a group, the user’s default group is the GUEST group.

When an application program logs on to the FairCom Server with one of the extended functions, it sends a User ID and user password to the FairCom Server. Logging on with one of the equivalent standard functions, or sending a NULL User ID with one of the extended functions, automatically assigns the User ID of GUEST and membership in the GUEST group. If a User ID and/or password are sent which do not exist, the initiating call to the FairCom Server returns an error code and the program is not connected to the FairCom Server.