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104 lines
2.8 KiB
Bash
Executable file
104 lines
2.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org>
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Page fault due to recursion. Fixed in r216150.
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# Looping in kernel: http://people.freebsd.org/~pho/stress/log/kostik737.txt
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# Fixed in r274712
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > socketpair.c
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mycc -o socketpair -Wall -Wextra -O2 socketpair.c
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rm -f socketpair.c
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[ -d $RUNDIR ] || mkdir -p $RUNDIR
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cd $RUNDIR
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ulimit -b 10485760
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/tmp/socketpair
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cd $here
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rm -f /tmp/socketpair
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exit 0
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EOF
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/* From http://lkml.org/lkml/2010/11/25/8 */
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mount.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/wait.h>
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#include <unistd.h>
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static int
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send_fd(int unix_fd, int fd)
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{
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struct msghdr msgh;
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struct cmsghdr *cmsg;
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char buf[CMSG_SPACE(sizeof(fd))];
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memset(&msgh, 0, sizeof(msgh));
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memset(buf, 0, sizeof(buf));
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msgh.msg_control = buf;
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msgh.msg_controllen = sizeof(buf);
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cmsg = CMSG_FIRSTHDR(&msgh);
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cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
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cmsg->cmsg_level = SOL_SOCKET;
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cmsg->cmsg_type = SCM_RIGHTS;
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msgh.msg_controllen = cmsg->cmsg_len;
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memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
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return sendmsg(unix_fd, &msgh, 0);
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}
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int
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main()
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{
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int fd[2], ff[2];
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if (socketpair(PF_UNIX, SOCK_SEQPACKET, 0, fd) == -1)
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return 1;
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for (;;) {
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if (socketpair(PF_UNIX, SOCK_SEQPACKET, 0, ff) == -1)
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return 2;
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send_fd(ff[0], fd[0]);
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send_fd(ff[0], fd[1]);
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close(fd[1]);
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close(fd[0]);
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fd[0] = ff[0];
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fd[1] = ff[1];
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}
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}
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