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
|
#!/usr/bin/python
# ex:ts=4:sw=4:sts=4:et
# -*- tab-width: 4; c-basic-offset: 4; indent-tabs-mode: nil -*-
#
# Copyright (C) 2015 Alexandru Damian for Intel Corp.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
# Utilities shared by tests and other common bits of code.
import sys, os, subprocess, fcntl, errno
import config
from config import logger
# License warning; this code is copied from the BitBake project, file bitbake/lib/bb/utils.py
# The code is originally licensed GPL-2.0, and we redistribute it under still GPL-2.0
# End of copy is marked with #ENDOFCOPY marker
def mkdirhier(directory):
"""Create a directory like 'mkdir -p', but does not complain if
directory already exists like os.makedirs
"""
try:
os.makedirs(directory)
except OSError as e:
if e.errno != errno.EEXIST:
raise e
def lockfile(name, shared=False, retry=True):
"""
Use the file fn as a lock file, return when the lock has been acquired.
Returns a variable to pass to unlockfile().
"""
config.logger.debug("take lockfile %s" % name)
dirname = os.path.dirname(name)
mkdirhier(dirname)
if not os.access(dirname, os.W_OK):
logger.error("Unable to acquire lock '%s', directory is not writable",
name)
sys.exit(1)
op = fcntl.LOCK_EX
if shared:
op = fcntl.LOCK_SH
if not retry:
op = op | fcntl.LOCK_NB
while True:
# If we leave the lockfiles lying around there is no problem
# but we should clean up after ourselves. This gives potential
# for races though. To work around this, when we acquire the lock
# we check the file we locked was still the lock file on disk.
# by comparing inode numbers. If they don't match or the lockfile
# no longer exists, we start again.
# This implementation is unfair since the last person to request the
# lock is the most likely to win it.
try:
lf = open(name, 'a+')
fileno = lf.fileno()
fcntl.flock(fileno, op)
statinfo = os.fstat(fileno)
if os.path.exists(lf.name):
statinfo2 = os.stat(lf.name)
if statinfo.st_ino == statinfo2.st_ino:
return lf
lf.close()
except Exception:
try:
lf.close()
except Exception:
pass
pass
if not retry:
return None
def unlockfile(lf):
"""
Unlock a file locked using lockfile()
"""
try:
# If we had a shared lock, we need to promote to exclusive before
# removing the lockfile. Attempt this, ignore failures.
fcntl.flock(lf.fileno(), fcntl.LOCK_EX|fcntl.LOCK_NB)
os.unlink(lf.name)
except (IOError, OSError):
pass
fcntl.flock(lf.fileno(), fcntl.LOCK_UN)
lf.close()
#ENDOFCOPY
def mk_lock_filename():
our_name = os.path.basename(__file__)
our_name = ".%s" % ".".join(reversed(our_name.split(".")))
return config.LOCKFILE + our_name
class ShellCmdException(Exception):
pass
def run_shell_cmd(command, cwd = None):
if cwd is None:
cwd = os.getcwd()
config.logger.debug("_shellcmd: (%s) %s" % (cwd, command))
p = subprocess.Popen(command, cwd = cwd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
(out,err) = p.communicate()
p.wait()
if p.returncode:
if len(err) == 0:
err = "command: %s \n%s" % (command, out)
else:
err = "command: %s \n%s" % (command, err)
config.logger.warn("_shellcmd: error \n%s\n%s" % (out, err))
raise ShellCmdException(err)
else:
#config.logger.debug("localhostbecontroller: shellcmd success\n%s" % out)
return out
|
