1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
import os
import re
import stat
import subprocess
import sys
from collections import defaultdict
from textwrap import dedent
def get_executable(prog, cwd="."):
'''Search for @prog in system PATH and @cwd.'''
cwd_path = "%s/%s" % (cwd, prog)
if is_executable(cwd_path):
return cwd_path
else:
for path in os.environ["PATH"].split(os.pathsep):
exe_file = os.path.join(path, prog)
if is_executable(exe_file):
return exe_file
full_cwd = os.path.abspath(cwd)
raise IOError("Cannot find executable '%s'! (cwd='%s')" % (prog, full_cwd))
def get_executable_hint(prog, hint, optional=False):
'''Search for @prog in system PATH. Print @hint if no binary is found.
Die if not @optional.'''
try:
full_path = get_executable(prog)
except IOError:
if not optional:
sys.stderr.write(("Cannot find executable '%s' in PATH. This is " +\
"a part of '%s' which should be added to PATH.\n")\
% (prog, hint))
sys.exit(1)
else:
full_path = None
return full_path
def get_config_option(option):
'''Search for @option in installed kernel config (if present).
Raise an IOError if the kernel config isn't found in /boot/.'''
uname = subprocess.check_output(["uname", "-r"]).strip()
fname = "/boot/config-%s" % uname
if os.path.exists(fname):
config_regex = "^CONFIG_{}=(?P<val>.*)$".format(option)
with open(fname, 'r') as f:
data = f.read()
match = re.search(config_regex, data, re.M)
if not match:
return None
else:
return match.group("val")
else:
raise IOError("No config file exists!")
def try_get_config_option(option, default):
try:
get_config_option(option)
except:
return default
def recordtype(typename, field_names, default=0):
''' Mutable namedtuple. Recipe from George Sakkis of MIT.'''
field_names = tuple(map(str, field_names))
# Create and fill-in the class template
numfields = len(field_names)
argtxt = ', '.join(field_names)
reprtxt = ', '.join('%s=%%r' % f for f in field_names)
dicttxt = ', '.join('%r: self.%s' % (f,f) for f in field_names)
tupletxt = repr(tuple('self.%s' % f for f in field_names)).replace("'",'')
inittxt = '; '.join('self.%s=%s' % (f,f) for f in field_names)
itertxt = '; '.join('yield self.%s' % f for f in field_names)
eqtxt = ' and '.join('self.%s==other.%s' % (f,f) for f in field_names)
template = dedent('''
class %(typename)s(object):
'%(typename)s(%(argtxt)s)'
__slots__ = %(field_names)r
def __init__(self, %(argtxt)s):
%(inittxt)s
def __len__(self):
return %(numfields)d
def __iter__(self):
%(itertxt)s
def __getitem__(self, index):
return getattr(self, self.__slots__[index])
def __setitem__(self, index, value):
return setattr(self, self.__slots__[index], value)
def todict(self):
'Return a new dict which maps field names to their values'
return {%(dicttxt)s}
def __repr__(self):
return '%(typename)s(%(reprtxt)s)' %% %(tupletxt)s
def __eq__(self, other):
return isinstance(other, self.__class__) and %(eqtxt)s
def __ne__(self, other):
return not self==other
def __getstate__(self):
return %(tupletxt)s
def __setstate__(self, state):
%(tupletxt)s = state
''') % locals()
# Execute the template string in a temporary namespace
namespace = {}
try:
exec template in namespace
except SyntaxError as e:
raise SyntaxError(e.message + ':\n' + template)
cls = namespace[typename]
# Setup defaults
init_defaults = tuple(default for f in field_names)
cls.__init__.im_func.func_defaults = init_defaults
# For pickling to work, the __module__ variable needs to be set to the frame
# where the named tuple is created. Bypass this step in environments where
# sys._getframe is not defined (Jython for example).
if hasattr(sys, '_getframe') and sys.platform != 'cli':
cls.__module__ = sys._getframe(1).f_globals['__name__']
return cls
def load_params(fname):
params = defaultdict(int)
with open(fname, 'r') as f:
data = f.read()
try:
params = eval(data)
except Exception as e:
raise IOError("Invalid param file: %s\n%s" % (fname, e))
return params
def num_cpus():
'''Return the number of CPUs in the system.'''
lnx_re = re.compile(r'^(processor|online)')
cpus = 0
with open('/proc/cpuinfo', 'r') as f:
for line in f:
if lnx_re.match(line):
cpus += 1
return cpus
def ft_freq():
umachine = subprocess.check_output(["uname", "-m"])
if re.match("armv7", umachine):
# Arm V7s use a millisecond timer
freq = 1000.0
elif re.match("x86", umachine):
# X86 timer is equal to processor clock
reg = re.compile(r'^cpu MHz\s*:\s*(?P<FREQ>\d+)', re.M)
with open('/proc/cpuinfo', 'r') as f:
data = f.read()
match = re.search(reg, data)
if not match:
raise Exception("Cannot parse CPU frequency from x86 CPU!")
freq = int(match.group('FREQ'))
else:
# You're on your own
freq = 0
return freq
def kernel():
return subprocess.check_output(["uname", "-r"]).strip("\n")
def is_executable(fname):
'''Return whether the file passed in is executable'''
return os.path.isfile(fname) and os.access(fname, os.X_OK)
def is_device(dev):
if not os.path.exists(dev):
return False
mode = os.stat(dev)[stat.ST_MODE]
return not (not mode & stat.S_IFCHR)
__logged = []
def set_logged_list(logged):
global __logged
__logged = logged
def log_once(id, msg = None, indent = True):
global __logged
msg = msg if msg else id
if id not in __logged:
__logged += [id]
if indent:
msg = ' ' + msg.strip('\t').replace('\n', '\n\t')
sys.stderr.write('\n' + msg.strip('\n') + '\n')
def get_cmd():
return os.path.split(sys.argv[0])[1]
|
