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apfstests/275
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WuBo e219e1cb59 275: add a write and reserve test
This test is for write-posix test. If writing a file when the disk is almost
full, the posix wants the call to write as much as possible but not none.

quote the POSIX:
If a write() requests that more bytes be written than there is room for
(for example, [XSI] [Option Start] the process' file size limit or
[Option End] the physical end of a medium), only as many bytes as there
is room for shall be written. For example, suppose there is space for 20
bytes more in a file before reaching a limit. A write of 512 bytes will
return 20. The next write of a non-zero number of bytes would give a
failure return (except as noted below).

Signed-off-by: Wu Bo <Wu.Bo@cn.fujitsu.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
2011-11-10 13:43:48 +00:00

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#! /bin/bash
# FS QA Test No. 275
#
# The posix write test. when write size is larger than disk free size,
# should write as more as possible
#
#-----------------------------------------------------------------------
# Copyright (c) 2011-2012 Fujitsu, Inc. All Rights Reserved.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it would be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write the Free Software Foundation,
# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
#
#-----------------------------------------------------------------------
#
#creator
owner=wu.bo@cn.fujitsu.com
seq=`basename $0`
echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=0 # success is the default!
trap "_cleanup; exit \$status" 0 1 2 3 15
_cleanup()
{
cd /
rm -f $SCRATCH_MNT/* $tmp.*
_scratch_unmount
}
. ./common.rc
. ./common.filter
# real QA test starts here
_supported_fs generic
_supported_os IRIX Linux
_require_scratch
echo "------------------------------"
echo "write lack test"
echo "------------------------------"
rm -f $seq.full
umount $SCRATCH_DEV 2>/dev/null
_scratch_mkfs_sized $((1 * 1024 * 1024 * 1024)) >>$seq.full 2>&1
_scratch_mount
rm -rf $SCRATCH_MNT/*
cd $SCRATCH_MNT
dd if=/dev/zero of=tmp1 bs=4K count=1 >/dev/null 2>&1
if [ $? -ne 0 ]
then
echo "create file err"
status=1
exit
fi
dd if=/dev/zero of=tmp2 bs=1M >/dev/null 2>&1
dd if=/dev/zero of=tmp3 bs=4K >/dev/null 2>&1
sync
rm -f tmp1
sync
dd if=/dev/zero of=tmp1 bs=8K count=1 >/dev/null 2>&1
_filesize=`du tmp1 | awk '{print $1}'`
if [ $_filesize -ne 4 ]
then
echo "write file err"
status=1
exit
fi
echo "done"
exit