Python os 模块，O_NOINHERIT 实例源码
我们从Python开源项目中，提取了以下13个代码示例，用于说明如何使用os.O_NOINHERIT。
def writef_win32(f, data, m='w', encoding='ISO8859-1'):
if sys.hexversion > 0x3000000 and not 'b' in m:
data = data.encode(encoding)
m += 'b'
flags = os.O_CREAT | os.O_TRUNC | os.O_WRONLY | os.O_NOINHERIT
if 'b' in m:
flags |= os.O_BINARY
if '+' in m:
flags |= os.O_RDWR
try:
fd = os.open(f, flags)
except OSError:
raise IOError('Cannot write to %r' % f)
f = os.fdopen(fd, m)
try:
f.write(data)
finally:
f.close()
def h_file_win32(fname):
try:
fd = os.open(fname, os.O_BINARY | os.O_RDONLY | os.O_NOINHERIT)
except OSError:
raise IOError('Cannot read from %r' % fname)
f = os.fdopen(fd, 'rb')
m = md5()
try:
while fname:
fname = f.read(200000)
m.update(fname)
finally:
f.close()
return m.digest()
# always save these
def writef_win32(f, data, m='w', encoding='ISO8859-1'):
if sys.hexversion > 0x3000000 and not 'b' in m:
data = data.encode(encoding)
m += 'b'
flags = os.O_CREAT | os.O_TRUNC | os.O_WRONLY | os.O_NOINHERIT
if 'b' in m:
flags |= os.O_BINARY
if '+' in m:
flags |= os.O_RDWR
try:
fd = os.open(f, flags)
except OSError:
raise IOError('Cannot write to %r' % f)
f = os.fdopen(fd, m)
try:
f.write(data)
finally:
f.close()
def h_file_win32(fname):
try:
fd = os.open(fname, os.O_BINARY | os.O_RDONLY | os.O_NOINHERIT)
except OSError:
raise IOError('Cannot read from %r' % fname)
f = os.fdopen(fd, 'rb')
m = md5()
try:
while fname:
fname = f.read(200000)
m.update(fname)
finally:
f.close()
return m.digest()
# always save these
def writef_win32(f, data, m='w', encoding='ISO8859-1'):
if sys.hexversion > 0x3000000 and not 'b' in m:
data = data.encode(encoding)
m += 'b'
flags = os.O_CREAT | os.O_TRUNC | os.O_WRONLY | os.O_NOINHERIT
if 'b' in m:
flags |= os.O_BINARY
if '+' in m:
flags |= os.O_RDWR
try:
fd = os.open(f, flags)
except OSError:
raise IOError('Cannot write to %r' % f)
f = os.fdopen(fd, m)
try:
f.write(data)
finally:
f.close()
def h_file_win32(fname):
try:
fd = os.open(fname, os.O_BINARY | os.O_RDONLY | os.O_NOINHERIT)
except OSError:
raise IOError('Cannot read from %r' % fname)
f = os.fdopen(fd, 'rb')
m = md5()
try:
while fname:
fname = f.read(200000)
m.update(fname)
finally:
f.close()
return m.digest()
# always save these
def init(ctx):
global LOGFILE
filename = os.path.abspath(LOGFILE)
try:
os.makedirs(os.path.dirname(os.path.abspath(filename)))
except OSError:
pass
if hasattr(os, 'O_NOINHERIT'):
fd = os.open(LOGFILE, os.O_CREAT | os.O_TRUNC | os.O_WRONLY | os.O_NOINHERIT)
fileobj = os.fdopen(fd, 'w')
else:
fileobj = open(LOGFILE, 'w')
old_stderr = sys.stderr
# sys.stdout has already been replaced, so __stdout__ will be faster
#sys.stdout = log_to_file(sys.stdout, fileobj, filename)
#sys.stderr = log_to_file(sys.stderr, fileobj, filename)
def wrap(stream):
if stream.isatty():
return ansiterm.AnsiTerm(stream)
return stream
sys.stdout = log_to_file(wrap(sys.__stdout__), fileobj, filename)
sys.stderr = log_to_file(wrap(sys.__stderr__), fileobj, filename)
# now mess with the logging module...
for x in Logs.log.handlers:
try:
stream = x.stream
except AttributeError:
pass
else:
if id(stream) == id(old_stderr):
x.stream = sys.stderr
def readf_win32(f, m='r', encoding='ISO8859-1'):
flags = os.O_NOINHERIT | os.O_RDONLY
if 'b' in m:
flags |= os.O_BINARY
if '+' in m:
flags |= os.O_RDWR
try:
fd = os.open(f, flags)
except OSError:
raise IOError('Cannot read from %r' % f)
if sys.hexversion > 0x3000000 and not 'b' in m:
m += 'b'
f = os.fdopen(fd, m)
try:
txt = f.read()
finally:
f.close()
if encoding:
txt = txt.decode(encoding)
else:
txt = txt.decode()
else:
f = os.fdopen(fd, m)
try:
txt = f.read()
finally:
f.close()
return txt
def init(ctx):
global LOGFILE
filename = os.path.abspath(LOGFILE)
try:
os.makedirs(os.path.dirname(os.path.abspath(filename)))
except OSError:
pass
if hasattr(os, 'O_NOINHERIT'):
fd = os.open(LOGFILE, os.O_CREAT | os.O_TRUNC | os.O_WRONLY | os.O_NOINHERIT)
fileobj = os.fdopen(fd, 'w')
else:
fileobj = open(LOGFILE, 'w')
old_stderr = sys.stderr
# sys.stdout has already been replaced, so __stdout__ will be faster
#sys.stdout = log_to_file(sys.stdout, fileobj, filename)
#sys.stderr = log_to_file(sys.stderr, fileobj, filename)
def wrap(stream):
if stream.isatty():
return ansiterm.AnsiTerm(stream)
return stream
sys.stdout = log_to_file(wrap(sys.__stdout__), fileobj, filename)
sys.stderr = log_to_file(wrap(sys.__stderr__), fileobj, filename)
# now mess with the logging module...
for x in Logs.log.handlers:
try:
stream = x.stream
except AttributeError:
pass
else:
if id(stream) == id(old_stderr):
x.stream = sys.stderr
def readf_win32(f, m='r', encoding='ISO8859-1'):
flags = os.O_NOINHERIT | os.O_RDONLY
if 'b' in m:
flags |= os.O_BINARY
if '+' in m:
flags |= os.O_RDWR
try:
fd = os.open(f, flags)
except OSError:
raise IOError('Cannot read from %r' % f)
if sys.hexversion > 0x3000000 and not 'b' in m:
m += 'b'
f = os.fdopen(fd, m)
try:
txt = f.read()
finally:
f.close()
if encoding:
txt = txt.decode(encoding)
else:
txt = txt.decode()
else:
f = os.fdopen(fd, m)
try:
txt = f.read()
finally:
f.close()
return txt
def readf_win32(f, m='r', encoding='ISO8859-1'):
flags = os.O_NOINHERIT | os.O_RDONLY
if 'b' in m:
flags |= os.O_BINARY
if '+' in m:
flags |= os.O_RDWR
try:
fd = os.open(f, flags)
except OSError:
raise IOError('Cannot read from %r' % f)
if sys.hexversion > 0x3000000 and not 'b' in m:
m += 'b'
f = os.fdopen(fd, m)
try:
txt = f.read()
finally:
f.close()
if encoding:
txt = txt.decode(encoding)
else:
txt = txt.decode()
else:
f = os.fdopen(fd, m)
try:
txt = f.read()
finally:
f.close()
return txt
def cached_hash_file(self):
try:
cache = self.ctx.cache_listdir_cache_hash_file
except AttributeError:
cache = self.ctx.cache_listdir_cache_hash_file = {}
if id(self.parent) in cache:
try:
t = cache[id(self.parent)][self.name]
except KeyError:
raise IOError('Not a file')
else:
# an opportunity to list the files and the timestamps at once
findData = ctypes.wintypes.WIN32_FIND_DATAW()
find = FindFirstFile(TP % self.parent.abspath(), ctypes.byref(findData))
if find == INVALID_HANDLE_VALUE:
cache[id(self.parent)] = {}
raise IOError('Not a file')
cache[id(self.parent)] = lst_files = {}
try:
while True:
if findData.cFileName not in UPPER_FOLDERS:
thatsadir = findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY
if not thatsadir:
ts = findData.ftLastWriteTime
d = (ts.dwLowDateTime << 32) | ts.dwHighDateTime
lst_files[str(findData.cFileName)] = d
if not FindNextFile(find, ctypes.byref(findData)):
break
except Exception:
cache[id(self.parent)] = {}
raise IOError('Not a file')
finally:
FindClose(find)
t = lst_files[self.name]
fname = self.abspath()
if fname in Build.hashes_md5_tstamp:
if Build.hashes_md5_tstamp[fname][0] == t:
return Build.hashes_md5_tstamp[fname][1]
try:
fd = os.open(fname, os.O_BINARY | os.O_RDONLY | os.O_NOINHERIT)
except OSError:
raise IOError('Cannot read from %r' % fname)
f = os.fdopen(fd, 'rb')
m = Utils.md5()
rb = 1
try:
while rb:
rb = f.read(200000)
m.update(rb)
finally:
f.close()
# ensure that the cache is overwritten
Build.hashes_md5_tstamp[fname] = (t, m.digest())
return m.digest()
def cached_hash_file(self):
try:
cache = self.ctx.cache_listdir_cache_hash_file
except AttributeError:
cache = self.ctx.cache_listdir_cache_hash_file = {}
if id(self.parent) in cache:
try:
t = cache[id(self.parent)][self.name]
except KeyError:
raise IOError('Not a file')
else:
# an opportunity to list the files and the timestamps at once
findData = ctypes.wintypes.WIN32_FIND_DATAW()
find = FindFirstFile(TP % self.parent.abspath(), ctypes.byref(findData))
if find == INVALID_HANDLE_VALUE:
cache[id(self.parent)] = {}
raise IOError('Not a file')
cache[id(self.parent)] = lst_files = {}
try:
while True:
if findData.cFileName not in UPPER_FOLDERS:
thatsadir = findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY
if not thatsadir:
ts = findData.ftLastWriteTime
d = (ts.dwLowDateTime << 32) | ts.dwHighDateTime
lst_files[str(findData.cFileName)] = d
if not FindNextFile(find, ctypes.byref(findData)):
break
except Exception as e:
cache[id(self.parent)] = {}
raise IOError('Not a file')
finally:
FindClose(find)
t = lst_files[self.name]
fname = self.abspath()
if fname in Build.hashes_md5_tstamp:
if Build.hashes_md5_tstamp[fname][0] == t:
return Build.hashes_md5_tstamp[fname][1]
try:
fd = os.open(fname, os.O_BINARY | os.O_RDONLY | os.O_NOINHERIT)
except OSError:
raise IOError('Cannot read from %r' % fname)
f = os.fdopen(fd, 'rb')
m = Utils.md5()
rb = 1
try:
while rb:
rb = f.read(200000)
m.update(rb)
finally:
f.close()
# ensure that the cache is overwritten
Build.hashes_md5_tstamp[fname] = (t, m.digest())
return m.digest()