'\" te
.\" Copyright (c) 2009, Sun Microsystems, Inc. All Rights Reserved.
.TH sysevent_get_class_name 3SYSEVENT "24 Jul 2009" "SunOS 5.11" "System Event Library Functions"
.SH NAME
sysevent_get_class_name, sysevent_get_subclass_name, sysevent_get_size, sysevent_get_seq, sysevent_get_time \- get class name, subclass name, ID or buffer size of event
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [\fIflag\fR\&.\|.\|.]  \fIfile\fR\&.\|.\|. \fB-lsysevent\fR [\fIlibrary\fR\&.\|.\|.] 
#include <libsysevent.h>

\fBchar *\fR\fBsysevent_get_class_name\fR(\fBsysevent_t *\fR\fIev\fR);
.fi

.LP
.nf
\fBchar *\fR\fBsysevent_get_subclass_name\fR(\fBsysevent_t *\fR\fIev\fR);
.fi

.LP
.nf
\fBint\fR \fBsysevent_get_size\fR(\fBsysevent_t *\fR\fIev\fR);
.fi

.LP
.nf
\fBuint64_t\fR \fBsysevent_get_seq\fR(\fBsysevent_t *\fR\fIev\fR);
.fi

.LP
.nf
\fBvoid\fR \fBsysevent_get_time\fR(\fBsysevent_t *\fR\fIev\fR, \fBhrtime_t *\fR\fIetimep\fR);
.fi

.SH PARAMETERS
.sp
.ne 2
.mk
.na
\fB\fIev\fR\fR
.ad
.RS 10n
.rt  
handle to event
.RE

.sp
.ne 2
.mk
.na
\fB\fIetimep\fR\fR
.ad
.RS 10n
.rt  
pointer to high resolution event time variable
.RE

.SH DESCRIPTION
.sp
.LP
The \fBsysevent_get_class_name()\fR and \fBsysevent_get_subclass_name()\fR functions return, respectively, the class and subclass names for the provided event \fIev\fR.
.sp
.LP
The \fBsysevent_get_size()\fR function returns the size of the event buffer, \fIev\fR.
.sp
.LP
The \fBsysevent_get_seq()\fR function returns a unique event sequence number of event \fIev\fR. The sequence number is reset on every system boot.
.sp
.LP
The \fBsysevent_get_time()\fR function writes the time the event was published into the variable pointed to by \fIetimep\fR. The event time is added to the event just before it is put into the kernel internal event queue.
.SH EXAMPLES
.LP
\fBExample 1 \fRParse sysevent header information.
.sp
.LP
The following example parses sysevent header information from an application's event handler.

.sp
.in +2
.nf
hrtime_t last_ev_time;
unit64_t last_ev_seq;

void
event_handler(sysevent_t *ev)
{
         sysevent_t *new_ev;
         int ev_sz;
         hrtime_t ev_time;
         uint64_t ev_seq;
         
         
         /* Filter on class and subclass */
         if (strcmp(EC_PRIV, sysevent_get_class_name(ev)) != 0) {
                 return;
         } else if (strcmp("ESC_MYSUBCLASS,
             sysevent_get_subclass_name(ev)) != 0) {
                 return;
         }
         
         /*
          * Check for replayed sysevent, time must
          * be greater than previously recorded.
          */
         sysevent_get_event_time(ev, &ev_time);
         ev_seq = sysevent_get_seq(ev);
         if (ev_time < last_ev_time ||
             (ev_time == last_ev_time && ev_seq <=
             last_ev_seq)) {
                 return;
         }
          
         last_ev_time = ev_time;
         last_ev_seq = ev_seq;
          
         /* Store event for later processing */
         ev_sz = sysevent_get_size(ev):
         new_ev (sysevent_t *)malloc(ev_sz);
         bcopy(ev, new_ev, ev_sz);
         queue_event(new_ev);
}
.fi
.in -2

.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(5) for descriptions of the following attributes:
.sp

.sp
.TS
tab() box;
cw(2.75i) |cw(2.75i) 
lw(2.75i) |lw(2.75i) 
.
ATTRIBUTE TYPEATTRIBUTE VALUE
_
Interface StabilityCommitted
_
MT-LevelMT-Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBattributes\fR(5)
.SH NOTES
.sp
.LP
The \fBlibsysevent\fR interfaces do not work at all in non-global zones.