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118 lines
3.1 KiB
Bash
Executable file
118 lines
3.1 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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# Test with read/write length of INT_MAX (i386) or INT_MAX+1 (amd64)
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. ../default.cfg
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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odir=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $odir/$0 > rdwr.c
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mycc -o rdwr -Wall rdwr.c || exit
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rm -f rdwr.c
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oldclamp=`sysctl debug.devfs_iosize_max_clamp 2>/dev/null |
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awk '{print $NF}'`
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if [ `uname -m` = amd64 ]; then
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[ "$oldclamp" = "1" ] && sysctl debug.devfs_iosize_max_clamp=0
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fi
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for j in `jot 10`; do
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/tmp/rdwr || { echo FAIL; break; }
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done
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if [ `uname -m` = amd64 ]; then
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[ "$oldclamp" = "1" ] && sysctl debug.devfs_iosize_max_clamp=1
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fi
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rm -f /tmp/rdwr
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exit
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EOF
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#include <sys/types.h>
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#include <sys/limits.h>
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#include <sys/mman.h>
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#include <sys/uio.h>
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#include <err.h>
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#include <fcntl.h>
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#include <unistd.h>
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int
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main(int argc, char **argv)
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{
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int fd1, fd2;
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size_t len;
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void *p;
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struct iovec iov;
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alarm(120);
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if ((fd1 = open("/dev/null", O_RDWR, 0)) == -1)
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err(1, "open /dev/null");
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if ((fd2 = open("/dev/zero", O_RDWR)) == -1)
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err(1, "open /dev/zero");
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if (sizeof(size_t) == sizeof(int32_t))
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len = (size_t)INT_MAX; /* i386 */
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else
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len = (size_t)INT_MAX + 1; /* amd64 */
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if ((p = mmap(0, len, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd2, 0)) ==
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MAP_FAILED)
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err(1, "mmap");
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if (read(fd2, p, len) != len)
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err(1, "read");
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if (write(fd1, p, len) != len)
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err(1, "write");
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if (pread(fd2, p, len, 0) != len)
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err(1, "pread");
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if (pwrite(fd1, p, len, 0) != len)
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err(1, "pwrite");
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iov.iov_base = p;
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iov.iov_len = len;
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if (readv(fd2, &iov, 1) != len)
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err(1, "readv");
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if (writev(fd1, &iov, 1) != len)
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err(1, "writev");
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if (preadv(fd2, &iov, 1, 0) != len)
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err(1, "preadv");
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if (pwritev(fd1, &iov, 1, 0) != len)
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err(1, "pwritev");
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close(fd1);
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close(fd2);
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return (0);
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}
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