#!/usr/sbin/dtrace -s
 /*
  * httpdstat.d - realtime httpd statistics. Uses DTrace.
  *
  * $Id: httpdstat.d 2 2007-08-01 10:01:43Z brendan $
  *
  * USAGE:	httpdstat.d [interval [count]]
  *
  *		interval	seconds
  *		count		number of samples
  *
  * FIELDS:
  *		TIME		Time, string
  *		NUM		Number of connections
  *		GET		Number of "GET"s
  *		POST		Number of "POST"s
  *		HEAD		Number of "HEAD"s
  *		TRACE		Number of "TRACE"s
  *
  * All of the statistics are printed as a value per interval (not per second).
  *
  * NOTE: This version does not process subsequent operations on keepalives.
  *
  * IDEA: Ryan Matteson (who first wrote a solution to this).
  *
  * COPYRIGHT: Copyright (c) 2005 Brendan Gregg.
  *
  * CDDL HEADER START
  *
  *  The contents of this file are subject to the terms of the
  *  Common Development and Distribution License, Version 1.0 only
  *  (the "License").  You may not use this file except in compliance
  *  with the License.
  *
  *  You can obtain a copy of the license at Docs/cddl1.txt
  *  or http://www.opensolaris.org/os/licensing.
  *  See the License for the specific language governing permissions
  *  and limitations under the License.
  *
  * CDDL HEADER END
  *
  * 20-Nov-2005	Brendan Gregg	Created this.
  */
 
 #pragma D option quiet
 #pragma D option defaultargs
 
 inline int SCREEN = 21;
 
 /*
  * Program Start
  */
 dtrace:::BEGIN
 {
 	num = 0; get = 0; head = 0; post = 0; trac = 0;
 	lines = SCREEN + 1;
 	secs = $1 ? $1 : 1;
 	counts = $2 ? $2 : -1;
 	first = 1;
 }
 
 profile:::tick-1sec
 {
 	secs--;
 }
 
 /*
  * Print Header
  */
 dtrace:::BEGIN,
 profile:::tick-1sec
 /first || (secs == 0 && lines > SCREEN)/
 {
 	printf("%-20s %6s %6s %5s %5s %5s\n", "TIME",
 	    "NUM", "GET", "POST", "HEAD", "TRACE");
 	lines = 0;
 	first = 0;
 }
 
 /*
  * Track Accept Events
  */
 syscall::accept:return
 /execname == "httpd"/
 {
 	self->buf = 1;
 }
 
 syscall::read:entry
 /self->buf/
 {
 	self->buf = arg1;
 }
 
 /*
  * Tally Data
  */
 syscall::read:return
 /self->buf && arg0/
 {
 	this->str = (char *)copyin(self->buf, arg0);
 	this->str[4] = '\0';
 	get  += stringof(this->str) == "GET " ? 1 : 0;
 	post += stringof(this->str) == "POST" ? 1 : 0;
 	head += stringof(this->str) == "HEAD" ? 1 : 0;
 	trac += stringof(this->str) == "TRAC" ? 1 : 0;
 	num++;
 	self->buf = 0;
 }
 
 /*
  * Print Output
  */
 profile:::tick-1sec
 /secs == 0/
 {
 	printf("%-20Y %6d %6d %5d %5d %5d\n", walltimestamp,
 	    num, get, post, head, trac);
 	num = 0; get = 0; head = 0; post = 0; trac = 0;
 	secs = $1 ? $1 : 1;
 	lines++;
 	counts--;
 }
 
 /*
  * End
  */
 profile:::tick-1sec
 /counts == 0/
 {
 	exit(0);
 }