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# Copyright (c) 2006 The Regents of The University of Michigan
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
# Authors: Ali Saidi
import os, sys
from os.path import join as joinpath
from os import environ as env
config_path = os.path.dirname(os.path.abspath(__file__))
config_root = os.path.dirname(config_path)
def searchpath(path, filename):
for p in path:
f = joinpath(p, filename)
if os.path.exists(f):
return f
raise IOError, "Can't find file '%s' on path." % filename
def disk(filename):
system()
return searchpath(disk.path, filename)
def binary(filename):
system()
return searchpath(binary.path, filename)
def script(filename):
system()
return searchpath(script.path, filename)
def system():
if not system.path:
try:
path = env['M5_PATH'].split(':')
except KeyError:
path = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
# expand '~' and '~user' in paths
path = map(os.path.expanduser, path)
# filter out non-existent directories
system.path = filter(os.path.isdir, path)
if not system.path:
raise IOError, "Can't find a path to system files."
if not binary.path:
binary.path = [joinpath(p, 'binaries') for p in system.path]
if not disk.path:
disk.path = [joinpath(p, 'disks') for p in system.path]
if not script.path:
script.path = [joinpath(config_root, 'boot')]
system.path = None
binary.path = None
disk.path = None
script.path = None
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