1#!/bin/sh 2 3# 4# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org> 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Demonstrate vnode leak 30 31# Test scenario by Petr Salinger <Petr Salinger seznam cz> 32 33. ../default.cfg 34 35kldstat -v | grep -q pty || { kldload pty || exit 0; } 36here=`pwd` 37cd /tmp 38sed '1,/^EOF/d' < $here/$0 > vnodes.c 39mycc -o vnodes -Wall -Wextra -O2 vnodes.c || exit 1 40rm -f vnodes.c 41 42s=0 43old=`sysctl -n vfs.numvnodes` 44/tmp/vnodes 45new=`sysctl -n vfs.numvnodes` 46[ $((new - old)) -gt 100 ] && { s=1; echo "FAIL vnode leak"; } 47 48rm -f /tmp/vnodes 49exit $s 50EOF 51#include <sys/types.h> 52#include <sys/wait.h> 53#include <err.h> 54#include <errno.h> 55#include <fcntl.h> 56#include <stdio.h> 57#include <stdlib.h> 58#include <unistd.h> 59 60char dname[]= "/dev/ptyrX"; 61 62void leak(void) 63{ 64 int i, fd; 65 66 if (fork() == 0) { 67 for (i = '0'; i < '9'; i ++) { 68 dname[9] = i; 69 fd = open(dname, O_RDWR); 70 if (fd == -1) 71 if (errno != EBUSY && errno != ENXIO) 72 err(1, "open(%s)", dname); 73 } 74 _exit(0); 75 } 76 wait(NULL); 77} 78 79int main(void) 80{ 81 int i; 82 83 for (i = 0 ;i < 100000; i++) { 84 leak(); 85 } 86 return (0); 87} 88