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#!/bin/bash
#
# Copyright (C) 2009 Red Hat, Inc.
# Copyright (c) 2000-2003,2006 Silicon Graphics, 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, see <http://www.gnu.org/licenses/>.
#
#
# setup and check for config parameters, and in particular
#
# EMAIL -           email of the script runner.
# TEST_DIR -        scratch test directory 
#
# - These can be added to $HOST_CONFIG_DIR (witch default to ./config)
#   below or a separate local configuration file can be used (using
#   the HOST_OPTIONS variable).
# - This script is shared by the stress test system and the auto-qa
#   system (includes both regression test and benchmark components).
# - this script shouldn't make any assertions about filesystem
#   validity or mountedness.
#

# all tests should use a common language setting to prevent golden
# output mismatches.
export LANG=C

PATH=".:$PATH"

HOST=`hostname -s`
HOSTOS=`uname -s`

EMAIL=root@localhost    # where auto-qa will send its status messages
export HOST_OPTIONS=${HOST_OPTIONS:=local.config}
export CHECK_OPTIONS=${CHECK_OPTIONS:="-g auto"}
export PWD=`pwd`

# $1 = prog to look for, $2* = default pathnames if not found in $PATH
set_prog_path()
{
    p=`which $1 2> /dev/null`
    if [ -n "$p" -a -x "$p" ]; then
        echo $p
        return 0
    fi
    p=$1

    shift
    for f; do
        if [ -x $f ]; then
            echo $f
            return 0
        fi
    done

    echo ""
    return 1
}

_fatal()
{
    echo "$*"
    status=1
    exit 1
}

export PERL_PROG="`set_prog_path perl`"
[ "$PERL_PROG" = "" ] && _fatal "perl not found"

export AWK_PROG="`set_prog_path awk`"
[ "$AWK_PROG" = "" ] && _fatal "awk not found"

export SED_PROG="`set_prog_path sed`"
[ "$SED_PROG" = "" ] && _fatal "sed not found"

export BC_PROG="`set_prog_path bc`"
[ "$BC_PROG" = "" ] && _fatal "bc not found"

export PS_ALL_FLAGS="-ef"

export QEMU_PROG="`set_prog_path qemu`"
[ "$QEMU_PROG" = "" ] && _fatal "qemu not found"

export QEMU_IMG_PROG="`set_prog_path qemu-img`"
[ "$QEMU_IMG_PROG" = "" ] && _fatal "qemu-img not found"

export QEMU_IO_PROG="`set_prog_path qemu-io`"
[ "$QEMU_IO_PROG" = "" ] && _fatal "qemu-io not found"

export QEMU=$QEMU_PROG
export QEMU_IMG=$QEMU_IMG_PROG 
export QEMU_IO="$QEMU_IO_PROG $QEMU_IO_OPTIONS"

[ -f /etc/qemu-iotest.config ]       && . /etc/qemu-iotest.config

if [ -z "$TEST_DIR" ]; then
	TEST_DIR=`pwd`/scratch
fi

if [ ! -e "$TEST_DIR" ]; then
	mkdir "$TEST_DIR"
fi

if [ ! -d "$TEST_DIR" ]; then
    echo "common.config: Error: \$TEST_DIR ($TEST_DIR) is not a directory"
    exit 1
fi

_readlink()
{
    if [ $# -ne 1 ]; then
        echo "Usage: _readlink filename" 1>&2
        exit 1
    fi

    perl -e "\$in=\"$1\";" -e '
    $lnk = readlink($in);
    if ($lnk =~ m!^/.*!) {
        print "$lnk\n";
    }
    else {
        chomp($dir = `dirname $in`);
        print "$dir/$lnk\n";
    }'
}

# make sure this script returns success
/bin/true