我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用os.O_NOFOLLOW。
def get_path_uid(path): """ Return path's uid. Does not follow symlinks: https://github.com/pypa/pip/pull/935#discussion_r5307003 Placed this function in backwardcompat due to differences on AIX and Jython, that should eventually go away. :raises OSError: When path is a symlink or can't be read. """ if hasattr(os, 'O_NOFOLLOW'): fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW) file_uid = os.fstat(fd).st_uid os.close(fd) else: # AIX and Jython # WARNING: time of check vulnerabity, but best we can do w/o NOFOLLOW if not os.path.islink(path): # older versions of Jython don't have `os.fstat` file_uid = os.stat(path).st_uid else: # raise OSError for parity with os.O_NOFOLLOW above raise OSError("%s is a symlink; Will not return uid for symlinks" % path) return file_uid
def _get_build_prefix(): """ Returns a safe build_prefix """ path = os.path.join(tempfile.gettempdir(), 'pip-build-%s' % \ getpass.getuser()) if sys.platform == 'win32': """ on windows(tested on 7) temp dirs are isolated """ return path try: os.mkdir(path) except OSError: file_uid = None try: fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW) file_uid = os.fstat(fd).st_uid os.close(fd) except OSError: file_uid = None if file_uid != os.getuid(): msg = "The temporary folder for building (%s) is not owned by your user!" \ % path print (msg) print("pip will not work until the temporary folder is " + \ "either deleted or owned by your user account.") raise pip.exceptions.InstallationError(msg) return path
def _secure_open_write(filename, fmode): # We only want to write to this file, so open it in write only mode flags = os.O_WRONLY # os.O_CREAT | os.O_EXCL will fail if the file already exists, so we only # will open *new* files. # We specify this because we want to ensure that the mode we pass is the # mode of the file. flags |= os.O_CREAT | os.O_EXCL # Do not follow symlinks to prevent someone from making a symlink that # we follow and insecurely open a cache file. if hasattr(os, "O_NOFOLLOW"): flags |= os.O_NOFOLLOW # On Windows we'll mark this file as binary if hasattr(os, "O_BINARY"): flags |= os.O_BINARY # Before we open our file, we want to delete any existing file that is # there try: os.remove(filename) except (IOError, OSError): # The file must not exist already, so we can just skip ahead to opening pass # Open our file, the use of os.O_CREAT | os.O_EXCL will ensure that if a # race condition happens between the os.remove and this line, that an # error will be raised. Because we utilize a lockfile this should only # happen if someone is attempting to attack us. fd = os.open(filename, flags, fmode) try: return os.fdopen(fd, "wb") except: # An error occurred wrapping our FD in a file object os.close(fd) raise
def get_path_uid(path): """ Return path's uid. Does not follow symlinks: https://github.com/pypa/pip/pull/935#discussion_r5307003 Placed this function in compat due to differences on AIX and Jython, that should eventually go away. :raises OSError: When path is a symlink or can't be read. """ if hasattr(os, 'O_NOFOLLOW'): fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW) file_uid = os.fstat(fd).st_uid os.close(fd) else: # AIX and Jython # WARNING: time of check vulnerability, but best we can do w/o NOFOLLOW if not os.path.islink(path): # older versions of Jython don't have `os.fstat` file_uid = os.stat(path).st_uid else: # raise OSError for parity with os.O_NOFOLLOW above raise OSError( "%s is a symlink; Will not return uid for symlinks" % path ) return file_uid
def get_path_uid(path): """ Return path's uid. Does not follow symlinks: https://github.com/pypa/pip/pull/935#discussion_r5307003 Placed this function in compat due to differences on AIX and Jython, that should eventually go away. :raises OSError: When path is a symlink or can't be read. """ if hasattr(os, 'O_NOFOLLOW'): fd = os.open(path, os.O_RDONLY | os.O_NOFOLLOW) file_uid = os.fstat(fd).st_uid os.close(fd) else: # AIX and Jython # WARNING: time of check vulnerabity, but best we can do w/o NOFOLLOW if not os.path.islink(path): # older versions of Jython don't have `os.fstat` file_uid = os.stat(path).st_uid else: # raise OSError for parity with os.O_NOFOLLOW above raise OSError( "%s is a symlink; Will not return uid for symlinks" % path ) return file_uid
