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# Page fault due to recursion. Fixed in r216150. 30 31# Looping in kernel: http://people.freebsd.org/~pho/stress/log/kostik737.txt 32# Fixed in r274712 33 34. ../default.cfg 35 36here=`pwd` 37cd /tmp 38sed '1,/^EOF/d' < $here/$0 > socketpair.c 39mycc -o socketpair -Wall -Wextra -O2 socketpair.c 40rm -f socketpair.c 41[ -d $RUNDIR ] || mkdir -p $RUNDIR 42cd $RUNDIR 43 44ulimit -b 10485760 45/tmp/socketpair 46 47cd $here 48rm -f /tmp/socketpair 49exit 0 50EOF 51/* From http://lkml.org/lkml/2010/11/25/8 */ 52 53#include <errno.h> 54#include <fcntl.h> 55#include <stdio.h> 56#include <stdlib.h> 57#include <string.h> 58#include <sys/mount.h> 59#include <sys/socket.h> 60#include <sys/un.h> 61#include <sys/wait.h> 62#include <unistd.h> 63 64static int 65send_fd(int unix_fd, int fd) 66{ 67 struct msghdr msgh; 68 struct cmsghdr *cmsg; 69 char buf[CMSG_SPACE(sizeof(fd))]; 70 memset(&msgh, 0, sizeof(msgh)); 71 memset(buf, 0, sizeof(buf)); 72 73 msgh.msg_control = buf; 74 msgh.msg_controllen = sizeof(buf); 75 76 cmsg = CMSG_FIRSTHDR(&msgh); 77 cmsg->cmsg_len = CMSG_LEN(sizeof(fd)); 78 cmsg->cmsg_level = SOL_SOCKET; 79 cmsg->cmsg_type = SCM_RIGHTS; 80 81 msgh.msg_controllen = cmsg->cmsg_len; 82 83 memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd)); 84 return sendmsg(unix_fd, &msgh, 0); 85} 86 87int 88main() 89{ 90 int fd[2], ff[2]; 91 92 if (socketpair(PF_UNIX, SOCK_SEQPACKET, 0, fd) == -1) 93 return 1; 94 for (;;) { 95 if (socketpair(PF_UNIX, SOCK_SEQPACKET, 0, ff) == -1) 96 return 2; 97 send_fd(ff[0], fd[0]); 98 send_fd(ff[0], fd[1]); 99 close(fd[1]); 100 close(fd[0]); 101 fd[0] = ff[0]; 102 fd[1] = ff[1]; 103 } 104} 105