A server needs to be told the names of the principals it represents when it starts up. A server can act as more than one principal. rpc_gss_set_svc_name() sets the name of the principals, as shown in the following code example.
char *principal, *mechanism; u_int req_time; principal = "email@example.com"; mechanism = "kerberos_v5"; req_time = 10000; /* time for which credential should be valid */ rpc_gss_set_svc_name(principal, mechanism, req_time, SERV_PROG, SERV_VERS);
Kerberos ignores the req_time parameter. Other authentication systems might use it.
For more information, see the rpc_gss_set_svc_name(3NSL) man page.