1#!/bin/sh 2 3# 4# Copyright (c) 2008 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# Test scenario by marcus@freebsd.org 30 31[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 32[ -z "`type perl 2>/dev/null`" ] && exit 0 33 34. ../default.cfg 35 36odir=`pwd` 37cd /tmp 38sed '1,/^EOF/d' < $odir/$0 > fullpath.c 39mycc -o fullpath -Wall fullpath.c 40rm -f fullpath.c 41cd /proc 42 43for i in `jot 5`; do 44 /tmp/fullpath & 45done 46 47for i in `jot 30`; do 48 for j in `jot 25`; do 49 pid=`perl -e 'print splice(@ARGV,rand(@ARGV),1), " ";' $(echo [0-9]*)` 50# echo $pid 51 procstat -f $pid > /dev/null 2>&1 52 procstat -f $pid > /dev/null 2>&1 53 procstat -f $pid > /dev/null 2>&1 54 procstat -f $pid > /dev/null 2>&1 55 procstat -f $pid > /dev/null 2>&1 56 done 57done 58 59for i in `jot 5`; do 60 wait 61done 62 63rm -f /tmp/fullpath 64exit 65EOF 66 67#include <sys/wait.h> 68#include <err.h> 69#include <signal.h> 70#include <stdio.h> 71#include <stdlib.h> 72#include <strings.h> 73#include <unistd.h> 74 75char buf[4096]; 76 77void 78handler(int i) { 79 exit(0); 80} 81 82int 83test(void) { 84 pid_t r; 85 int status; 86 87 for (;;) { 88 r = fork(); 89 if (r == 0) { 90 bzero(buf, sizeof(buf)); 91 exit(0); /*child dies */ 92 } 93 if (r < 0) { 94 perror("fork"); 95 exit(2); 96 } 97 wait(&status); 98 } 99 return 0; 100} 101 102int main(int argc, char **argv) 103{ 104 105 signal(SIGALRM, handler); 106 alarm(60); 107 108 return test(); 109} 110