NAME

       pam_usertype - check if the authenticated user is a system or regular account

SYNOPSIS

       pam_usertype.so [flag...] {condition}

DESCRIPTION

       pam_usertype.so is designed to succeed or fail authentication based on type of the account of the
       authenticated user. The type of the account is decided with help of SYS_UID_MAX settings in
       /etc/login.defs. One use is to select whether to load other modules based on this test.

       The module should be given only one condition as module argument. Authentication will succeed only if the
       condition is met.

OPTIONS

       The following flags are supported:

       use_uid
           Evaluate conditions using the account of the user whose UID the application is running under instead
           of the user being authenticated.

       audit
           Log unknown users to the system log.

       Available conditions are:

       issystem
           Succeed if the user is a system user.

       isregular
           Succeed if the user is a regular user.

MODULE TYPES PROVIDED

       All module types (account, auth, password and session) are provided.

RETURN VALUES

       PAM_SUCCESS
           The condition was true.

       PAM_BUF_ERR
           Memory buffer error.

       PAM_CONV_ERR
           The conversation method supplied by the application failed to obtain the username.

       PAM_INCOMPLETE
           The conversation method supplied by the application returned PAM_CONV_AGAIN.

       PAM_AUTH_ERR
           The condition was false.

       PAM_SERVICE_ERR
           A service error occurred or the arguments can't be parsed correctly.

       PAM_USER_UNKNOWN
           User was not found.

EXAMPLES

       Skip remaining modules if the user is a system user:

           account sufficient pam_usertype.so issystem

SEE ALSO

       login.defs(5), pam(8)

AUTHOR

       Pavel Březina <pbrezina@redhat.com>

Linux-PAM                                          05/07/2023                                    PAM_USERTYPE(8)