1#!/bin/sh
2#
3# Copyright (c) 2012 George V. Neville-Neil
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD$
28#
29# The hotopen D script periodically outputs  table of which UIDs
30# are opening files.   This is a very quick way to find out if
31# a paritcular user is thrashing a system with rapid calls to
32# open/close.
33#
34# Usage: hotopen
35#
36
37/usr/sbin/dtrace -n '
38#pragma D option quiet
39BEGIN
40{
41	printf("Files opened per UID in the last second.\n");
42}
43
44syscall::open:entry
45{
46	@files[uid] = count();
47	output = 1;
48}
49
50tick-1sec
51/output != 0/
52{
53	printf("%-20Y \n", walltimestamp);
54	printa("uid %d\tcount %@d\n", @files, @files);
55	trunc(@files);
56	output = 0;
57}
58'
59