configs/common/SysPaths.py

   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
  29 import os, sys
  30 from os.path import isdir, join as joinpath
  31 from os import environ as env
  32
  33 config_path = os.path.dirname(os.path.abspath(__file__))
  34 config_root = os.path.dirname(config_path)
  35
  36 def disk(file):
  37     system()
  38     return joinpath(disk.dir, file)
  39
  40 def binary(file):
  41     system()
  42     return joinpath(binary.dir, file)
  43
  44 def script(file):
  45     system()
  46     return joinpath(script.dir, file)
  47
  48 def 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
  68 system.dir = None
  69 binary.dir = None
  70 disk.dir = None
  71 script.dir = None