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

--- 13 unchanged lines hidden (view full) ---

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
30
31config_path = os.path.dirname(os.path.abspath(__file__))
32config_root = os.path.dirname(config_path)
33
34class PathSearchFunc(object):
35 _sys_paths = None
36
37 def __init__(self, *subdirs):
38 self._subdir = os.path.join(*subdirs)
39
40 def __call__(self, filename):
41 if self._sys_paths is None:
42 try:
43 paths = os.environ['M5_PATH'].split(':')
44 except KeyError:
45 paths = [ '/dist/m5/system', '/n/poolfs/z/dist/m5/system' ]
46
47 # expand '~' and '~user' in paths
48 paths = map(os.path.expanduser, paths)
49
50 # filter out non-existent directories
51 paths = filter(os.path.isdir, paths)
52
53 if not paths:
54 raise IOError, "Can't find a path to system files."
55
56 self._sys_paths = paths
57
58 filepath = os.path.join(self._subdir, filename)
59 paths = (os.path.join(p, filepath) for p in self._sys_paths)
60 try:
61 return next(p for p in paths if os.path.exists(p))
62 except StopIteration:
63 raise IOError, "Can't find file '%s' on path." % filename
64
65disk = PathSearchFunc('disks')
66binary = PathSearchFunc('binaries')
67script = PathSearchFunc('boot')