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#!/bin/sh
# Copyright (C) 2014-2021 Assaf Gordon <assafgordon@gmail.com>
#
# datamash I/O error testing module
#
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will 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, see <https://www.gnu.org/licenses/>.
#
# Written by Assaf Gordon.
BLOCK_SIZE=1024
IMGFILE=tiny_disk.img
LOG=log.txt
die()
{
BASE=$(basename "$0")
## Print the STDOUT and STDERR we have so far
cat $LOG >&2
echo "$BASE: error: $@" >&2
exit 1
}
# Reset log
echo > $LOG
## Ugly hack: Add common places where required programs might be.
## This script is run as a non-root user, so these directories
## might not be on the $PATH
PATH=$PATH:/sbin:/usr/sbin:/usr/local/sbin
for PROG in mkfs.ext3 ;
do
which $PROG >/dev/null 2>&1 ||
die "required program '$PROG' not found in \$PATH."
done
## Create a tiny ext3 file system image
dd if=/dev/zero of=$IMGFILE bs=1k count=64 1>$LOG 2>&1 || die "dd failed"
yes | mkfs.ext3 -T small -b ${BLOCK_SIZE} $IMGFILE 1>$LOG 2>&1 ||
die "mkfs.ext3 failed"
echo "
Done!
To use this file-systems, run:
mkdir /tmp/fullfs/
sudo mount -o sync $IMGFILE /tmp/fullfs/
sudo chown \$USER /tmp/fullfs/
Clean the file system (before any testing):
find /tmp/fullfs/ -maxdepth 1 -type f -delete
Writing to this file system should fail with 'no space'
(But unlike /dev/full, only after ~30KB are succesfully written):
seq 100000 >/tmp/fullfs/test.txt
"
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