SysPaths.py revision 3510:c529f0b16334 
1# Copyright (c) 2006 The Regents of The University of Michigan
2# All rights reserved.
3#
4# Redistribution and use in source and binary forms, with or without
5# modification, are permitted provided that the following conditions are
6# met: redistributions of source code must retain the above copyright
7# notice, this list of conditions and the following disclaimer;
8# redistributions in binary form must reproduce the above copyright
9# notice, this list of conditions and the following disclaimer in the
10# documentation and/or other materials provided with the distribution;
11# neither the name of the copyright holders nor the names of its
12# contributors may be used to endorse or promote products derived from
13# this software without specific prior written permission.
14#
15# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26#
27# Authors: Ali Saidi
28
29import os, sys
30from os.path import isdir, join as joinpath
31from os import environ as env
32
33config_path = os.path.dirname(os.path.abspath(__file__))
34config_root = os.path.dirname(config_path)
35
36def disk(file):
37    system()
38    return joinpath(disk.dir, file)
39
40def binary(file):
41    system()
42    return joinpath(binary.dir, file)
43
44def script(file):
45    system()
46    return joinpath(script.dir, file)
47
48def system():
49    if not system.dir:
50        try:
51                path = env['M5_PATH'].split(':')
52        except KeyError:
53                path = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
54
55        for system.dir in path:
56            if os.path.isdir(system.dir):
57                break
58        else:
59            raise ImportError, "Can't find a path to system files."
60
61    if not binary.dir:
62        binary.dir = joinpath(system.dir, 'binaries')
63    if not disk.dir:
64        disk.dir = joinpath(system.dir, 'disks')
65    if not script.dir:
66        script.dir = joinpath(config_root, 'boot')
67
68system.dir = None
69binary.dir = None
70disk.dir = None
71script.dir = None
72