def open(self, path, flags, mode=0777):
"""
Similar to Python's os.open()
As of today, the only way to consume the raw glfd returned is by
passing it to File class.
:param path: Path of file to be opened
:param flags: Integer which flags must include one of the following
access modes: os.O_RDONLY, os.O_WRONLY, or os.O_RDWR.
:param mode: specifies the permissions to use in case a new
file is created.
:returns: the raw glfd
"""
if not isinstance(flags, int):
raise TypeError("flags must evaluate to an integer")
if (os.O_CREAT & flags) == os.O_CREAT:
fd = api.glfs_creat(self.fs, path, flags, mode)
else:
fd = api.glfs_open(self.fs, path, flags)
if not fd:
err = ctypes.get_errno()
raise OSError(err, os.strerror(err))
return fd
def fopen(self, path, mode='r'):
"""
Similar to Python's built-in File object returned by Python's open()
Unlike Python's open(), fopen() provided here is only for convenience
and it does NOT invoke glibc's fopen and does NOT do any kind of
I/O bufferring as of today.
:param path: Path of file to be opened
:param mode: Mode to open the file with. This is a string.
:returns: an instance of File class
"""
if not isinstance(mode, basestring):
raise TypeError("Mode must be a string")
try:
flags = python_mode_to_os_flags[mode]
except KeyError:
raise ValueError("Invalid mode")
else:
if (os.O_CREAT & flags) == os.O_CREAT:
fd = api.glfs_creat(self.fs, path, flags, 0666)
else:
fd = api.glfs_open(self.fs, path, flags)
if not fd:
err = ctypes.get_errno()
raise OSError(err, os.strerror(err))
return File(fd, path=path, mode=mode)
def open(self, path, flags, mode=0777):
"""
Similar to Python's os.open()
As of today, the only way to consume the raw glfd returned is by
passing it to File class.
:param path: Path of file to be opened
:param flags: Integer which flags must include one of the following
access modes: os.O_RDONLY, os.O_WRONLY, or os.O_RDWR.
:param mode: specifies the permissions to use in case a new
file is created.
:returns: the raw glfd
"""
if not isinstance(flags, int):
raise TypeError("flags must evaluate to an integer")
if (os.O_CREAT & flags) == os.O_CREAT:
fd = api.glfs_creat(self.fs, path, flags, mode)
else:
fd = api.glfs_open(self.fs, path, flags)
if not fd:
err = ctypes.get_errno()
raise OSError(err, os.strerror(err))
return fd
def fopen(self, path, mode='r'):
"""
Similar to Python's built-in File object returned by Python's open()
Unlike Python's open(), fopen() provided here is only for convenience
and it does NOT invoke glibc's fopen and does NOT do any kind of
I/O bufferring as of today.
The most commonly-used values of mode are 'r' for reading, 'w' for
writing (truncating the file if it already exists), and 'a' for
appending. If mode is omitted, it defaults to 'r'.
Modes 'r+', 'w+' and 'a+' open the file for updating (reading and
writing); note that 'w+' truncates the file.
Append 'b' to the mode to open the file in binary mode but this has
no effect as of today.
:param path: Path of file to be opened
:param mode: Mode to open the file with. This is a string.
:returns: an instance of File class
:raises: OSError on failure to create/open file.
TypeError and ValueError if mode is invalid.
"""
if not isinstance(mode, basestring):
raise TypeError("Mode must be a string")
try:
flags = python_mode_to_os_flags[mode]
except KeyError:
raise ValueError("Invalid mode")
else:
if (os.O_CREAT & flags) == os.O_CREAT:
fd = api.glfs_creat(self.fs, path, flags, 0666)
else:
fd = api.glfs_open(self.fs, path, flags)
if not fd:
err = ctypes.get_errno()
raise OSError(err, os.strerror(err))
return File(fd, path=path, mode=mode)
