The fixed-length header contains the following data:

/* Standard event data structure */
 
struct std_alert {
  long          alrt_timestamp;
  unsigned char alrt_eventname[EVLEN+1];
  unsigned char alrt_pad1;
  unsigned char alrt_servicename[SNLEN+1];
};

where:

• alrt_timestamp indicates the time and date of the event.
  
• alrt_eventname is an ASCIIZ string indicating the alert class (type of event).
  
• alrt_pad1 word-aligns data structure components.
  
• alrt_servicename is an ASCIIZ string indicating the application that is raising the alert.