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[Xen-changelog] Remove unused tempfile.py. Even if anyone were using it,

To: xen-changelog@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-changelog] Remove unused tempfile.py. Even if anyone were using it, they shouldn't be --
From: Xen patchbot -unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>
Date: Fri, 23 Sep 2005 16:02:10 +0000
Delivery-date: Fri, 23 Sep 2005 15:59:44 +0000
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# HG changeset patch
# User emellor@ewan
# Node ID 0e2fdfe6b2bccfd8afb64ff96946ee70c09bf206
# Parent  64e3cab7ab9e6b4f44e063ffe36ff8952abbbe54
Remove unused tempfile.py.  Even if anyone were using it, they shouldn't be --
there's tempfile functionality in the Python standard library.

Signed-off-by: Ewan Mellor <ewan@xxxxxxxxxxxxx>

diff -r 64e3cab7ab9e -r 0e2fdfe6b2bc tools/python/xen/util/tempfile.py
--- a/tools/python/xen/util/tempfile.py Fri Sep 23 14:53:36 2005
+++ /dev/null   Fri Sep 23 15:04:43 2005
@@ -1,451 +0,0 @@
-"""Temporary files.
-
-This module provides generic, low- and high-level interfaces for
-creating temporary files and directories.  The interfaces listed
-as "safe" just below can be used without fear of race conditions.
-Those listed as "unsafe" cannot, and are provided for backward
-compatibility only.
-
-This module also provides some data items to the user:
-
-  TMP_MAX  - maximum number of names that will be tried before
-             giving up.
-  template - the default prefix for all temporary names.
-             You may change this to control the default prefix.
-  tempdir  - If this is set to a string before the first use of
-             any routine from this module, it will be considered as
-             another candidate location to store temporary files.
-"""
-
-__all__ = [
-    "NamedTemporaryFile", "TemporaryFile", # high level safe interfaces
-    "mkstemp", "mkdtemp",                  # low level safe interfaces
-    "mktemp",                              # deprecated unsafe interface
-    "TMP_MAX", "gettempprefix",            # constants
-    "tempdir", "gettempdir"
-   ]
-
-
-# Imports.
-
-import os as _os
-import errno as _errno
-from random import Random as _Random
-
-if _os.name == 'mac':
-    import Carbon.Folder as _Folder
-    import Carbon.Folders as _Folders
-
-try:
-    import fcntl as _fcntl
-    # If PYTHONCASEOK is set on Windows, stinking FCNTL.py gets
-    # imported, and we don't get an ImportError then.  Provoke
-    # an AttributeError instead in that case.
-    _fcntl.fcntl
-except (ImportError, AttributeError):
-    def _set_cloexec(fd):
-        pass
-else:
-    def _set_cloexec(fd):
-        flags = _fcntl.fcntl(fd, _fcntl.F_GETFD, 0)
-        if flags >= 0:
-            # flags read successfully, modify
-            flags |= _fcntl.FD_CLOEXEC
-            _fcntl.fcntl(fd, _fcntl.F_SETFD, flags)
-
-
-try:
-    import thread as _thread
-except ImportError:
-    import dummy_thread as _thread
-_allocate_lock = _thread.allocate_lock
-
-_text_openflags = _os.O_RDWR | _os.O_CREAT | _os.O_EXCL
-if hasattr(_os, 'O_NOINHERIT'):
-    _text_openflags |= _os.O_NOINHERIT
-if hasattr(_os, 'O_NOFOLLOW'):
-    _text_openflags |= _os.O_NOFOLLOW
-
-_bin_openflags = _text_openflags
-if hasattr(_os, 'O_BINARY'):
-    _bin_openflags |= _os.O_BINARY
-
-if hasattr(_os, 'TMP_MAX'):
-    TMP_MAX = _os.TMP_MAX
-else:
-    TMP_MAX = 10000
-
-template = "tmp"
-
-tempdir = None
-
-# Internal routines.
-
-_once_lock = _allocate_lock()
-
-class _RandomNameSequence:
-    """An instance of _RandomNameSequence generates an endless
-    sequence of unpredictable strings which can safely be incorporated
-    into file names.  Each string is six characters long.  Multiple
-    threads can safely use the same instance at the same time.
-
-    _RandomNameSequence is an iterator."""
-
-    characters = ("abcdefghijklmnopqrstuvwxyz" +
-                  "ABCDEFGHIJKLMNOPQRSTUVWXYZ" +
-                  "0123456789-_")
-
-    def __init__(self):
-        self.mutex = _allocate_lock()
-        self.rng = _Random()
-        self.normcase = _os.path.normcase
-
-    def __iter__(self):
-        return self
-
-    def next(self):
-        m = self.mutex
-        c = self.characters
-        choose = self.rng.choice
-
-        m.acquire()
-        try:
-            letters = [choose(c) for dummy in "123456"]
-        finally:
-            m.release()
-
-        return self.normcase(''.join(letters))
-
-def _candidate_tempdir_list():
-    """Generate a list of candidate temporary directories which
-    _get_default_tempdir will try."""
-
-    dirlist = []
-
-    # First, try the environment.
-    for envname in 'TMPDIR', 'TEMP', 'TMP':
-        dirname = _os.getenv(envname)
-        if dirname: dirlist.append(dirname)
-
-    # Failing that, try OS-specific locations.
-    if _os.name == 'mac':
-        try:
-            fsr = _Folder.FSFindFolder(_Folders.kOnSystemDisk,
-                                              _Folders.kTemporaryFolderType, 1)
-            dirname = fsr.as_pathname()
-            dirlist.append(dirname)
-        except _Folder.error:
-            pass
-    elif _os.name == 'riscos':
-        dirname = _os.getenv('Wimp$ScrapDir')
-        if dirname: dirlist.append(dirname)
-    elif _os.name == 'nt':
-        dirlist.extend([ r'c:\temp', r'c:\tmp', r'\temp', r'\tmp' ])
-    else:
-        dirlist.extend([ '/tmp', '/var/tmp', '/usr/tmp' ])
-
-    # As a last resort, the current directory.
-    try:
-        dirlist.append(_os.getcwd())
-    except (AttributeError, _os.error):
-        dirlist.append(_os.curdir)
-
-    return dirlist
-
-def _get_default_tempdir():
-    """Calculate the default directory to use for temporary files.
-    This routine should be called exactly once.
-
-    We determine whether or not a candidate temp dir is usable by
-    trying to create and write to a file in that directory.  If this
-    is successful, the test file is deleted.  To prevent denial of
-    service, the name of the test file must be randomized."""
-
-    namer = _RandomNameSequence()
-    dirlist = _candidate_tempdir_list()
-    flags = _text_openflags
-
-    for dir in dirlist:
-        if dir != _os.curdir:
-            dir = _os.path.normcase(_os.path.abspath(dir))
-        # Try only a few names per directory.
-        for seq in xrange(100):
-            name = namer.next()
-            filename = _os.path.join(dir, name)
-            try:
-                fd = _os.open(filename, flags, 0600)
-                fp = _os.fdopen(fd, 'w')
-                fp.write('blat')
-                fp.close()
-                _os.unlink(filename)
-                del fp, fd
-                return dir
-            except (OSError, IOError), e:
-                if e[0] != _errno.EEXIST:
-                    break # no point trying more names in this directory
-                pass
-    raise IOError, (_errno.ENOENT,
-                    ("No usable temporary directory found in %s" % dirlist))
-
-_name_sequence = None
-
-def _get_candidate_names():
-    """Common setup sequence for all user-callable interfaces."""
-
-    global _name_sequence
-    if _name_sequence is None:
-        _once_lock.acquire()
-        try:
-            if _name_sequence is None:
-                _name_sequence = _RandomNameSequence()
-        finally:
-            _once_lock.release()
-    return _name_sequence
-
-
-def _mkstemp_inner(dir, pre, suf, flags):
-    """Code common to mkstemp, TemporaryFile, and NamedTemporaryFile."""
-
-    names = _get_candidate_names()
-
-    for seq in xrange(TMP_MAX):
-        name = names.next()
-        file = _os.path.join(dir, pre + name + suf)
-        try:
-            fd = _os.open(file, flags, 0600)
-            _set_cloexec(fd)
-            return (fd, file)
-        except OSError, e:
-            if e.errno == _errno.EEXIST:
-                continue # try again
-            raise
-
-    raise IOError, (_errno.EEXIST, "No usable temporary file name found")
-
-
-# User visible interfaces.
-
-def gettempprefix():
-    """Accessor for tempdir.template."""
-    return template
-
-tempdir = None
-
-def gettempdir():
-    """Accessor for tempdir.tempdir."""
-    global tempdir
-    if tempdir is None:
-        _once_lock.acquire()
-        try:
-            if tempdir is None:
-                tempdir = _get_default_tempdir()
-        finally:
-            _once_lock.release()
-    return tempdir
-
-def mkstemp(suffix="", prefix=template, dir=None, text=False):
-    """mkstemp([suffix, [prefix, [dir, [text]]]])
-    User-callable function to create and return a unique temporary
-    file.  The return value is a pair (fd, name) where fd is the
-    file descriptor returned by os.open, and name is the filename.
-
-    If 'suffix' is specified, the file name will end with that suffix,
-    otherwise there will be no suffix.
-
-    If 'prefix' is specified, the file name will begin with that prefix,
-    otherwise a default prefix is used.
-
-    If 'dir' is specified, the file will be created in that directory,
-    otherwise a default directory is used.
-
-    If 'text' is specified and true, the file is opened in text
-    mode.  Else (the default) the file is opened in binary mode.  On
-    some operating systems, this makes no difference.
-
-    The file is readable and writable only by the creating user ID.
-    If the operating system uses permission bits to indicate whether a
-    file is executable, the file is executable by no one. The file
-    descriptor is not inherited by children of this process.
-
-    Caller is responsible for deleting the file when done with it.
-    """
-
-    if dir is None:
-        dir = gettempdir()
-
-    if text:
-        flags = _text_openflags
-    else:
-        flags = _bin_openflags
-
-    return _mkstemp_inner(dir, prefix, suffix, flags)
-
-
-def mkdtemp(suffix="", prefix=template, dir=None):
-    """mkdtemp([suffix, [prefix, [dir]]])
-    User-callable function to create and return a unique temporary
-    directory.  The return value is the pathname of the directory.
-
-    Arguments are as for mkstemp, except that the 'text' argument is
-    not accepted.
-
-    The directory is readable, writable, and searchable only by the
-    creating user.
-
-    Caller is responsible for deleting the directory when done with it.
-    """
-
-    if dir is None:
-        dir = gettempdir()
-
-    names = _get_candidate_names()
-
-    for seq in xrange(TMP_MAX):
-        name = names.next()
-        file = _os.path.join(dir, prefix + name + suffix)
-        try:
-            _os.mkdir(file, 0700)
-            return file
-        except OSError, e:
-            if e.errno == _errno.EEXIST:
-                continue # try again
-            raise
-
-    raise IOError, (_errno.EEXIST, "No usable temporary directory name found")
-
-def mktemp(suffix="", prefix=template, dir=None):
-    """mktemp([suffix, [prefix, [dir]]])
-    User-callable function to return a unique temporary file name.  The
-    file is not created.
-
-    Arguments are as for mkstemp, except that the 'text' argument is
-    not accepted.
-
-    This function is unsafe and should not be used.  The file name
-    refers to a file that did not exist at some point, but by the time
-    you get around to creating it, someone else may have beaten you to
-    the punch.
-    """
-
-##    from warnings import warn as _warn
-##    _warn("mktemp is a potential security risk to your program",
-##          RuntimeWarning, stacklevel=2)
-
-    if dir is None:
-        dir = gettempdir()
-
-    names = _get_candidate_names()
-    for seq in xrange(TMP_MAX):
-        name = names.next()
-        file = _os.path.join(dir, prefix + name + suffix)
-        if not _os.path.exists(file):
-            return file
-
-    raise IOError, (_errno.EEXIST, "No usable temporary filename found")
-
-class _TemporaryFileWrapper:
-    """Temporary file wrapper
-
-    This class provides a wrapper around files opened for
-    temporary use.  In particular, it seeks to automatically
-    remove the file when it is no longer needed.
-    """
-
-    def __init__(self, file, name):
-        self.file = file
-        self.name = name
-        self.close_called = False
-
-    def __getattr__(self, name):
-        file = self.__dict__['file']
-        a = getattr(file, name)
-        if type(a) != type(0):
-            setattr(self, name, a)
-        return a
-
-    # NT provides delete-on-close as a primitive, so we don't need
-    # the wrapper to do anything special.  We still use it so that
-    # file.name is useful (i.e. not "(fdopen)") with NamedTemporaryFile.
-    if _os.name != 'nt':
-
-        # Cache the unlinker so we don't get spurious errors at
-        # shutdown when the module-level "os" is None'd out.  Note
-        # that this must be referenced as self.unlink, because the
-        # name TemporaryFileWrapper may also get None'd out before
-        # __del__ is called.
-        unlink = _os.unlink
-
-        def close(self):
-            if not self.close_called:
-                self.close_called = True
-                self.file.close()
-                self.unlink(self.name)
-
-        def __del__(self):
-            self.close()
-
-def NamedTemporaryFile(mode='w+b', bufsize=-1, suffix="",
-                       prefix=template, dir=None):
-    """Create and return a temporary file.
-    Arguments:
-    'prefix', 'suffix', 'dir' -- as for mkstemp.
-    'mode' -- the mode argument to os.fdopen (default "w+b").
-    'bufsize' -- the buffer size argument to os.fdopen (default -1).
-    The file is created as mkstemp() would do it.
-
-    Returns a file object; the name of the file is accessible as
-    file.name.  The file will be automatically deleted when it is
-    closed.
-    """
-
-    if dir is None:
-        dir = gettempdir()
-
-    if 'b' in mode:
-        flags = _bin_openflags
-    else:
-        flags = _text_openflags
-
-    # Setting O_TEMPORARY in the flags causes the OS to delete
-    # the file when it is closed.  This is only supported by Windows.
-    if _os.name == 'nt':
-        flags |= _os.O_TEMPORARY
-
-    (fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
-    file = _os.fdopen(fd, mode, bufsize)
-    return _TemporaryFileWrapper(file, name)
-
-if _os.name != 'posix' or _os.sys.platform == 'cygwin':
-    # On non-POSIX and Cygwin systems, assume that we cannot unlink a file
-    # while it is open.
-    TemporaryFile = NamedTemporaryFile
-
-else:
-    def TemporaryFile(mode='w+b', bufsize=-1, suffix="",
-                      prefix=template, dir=None):
-        """Create and return a temporary file.
-        Arguments:
-        'prefix', 'suffix', 'directory' -- as for mkstemp.
-        'mode' -- the mode argument to os.fdopen (default "w+b").
-        'bufsize' -- the buffer size argument to os.fdopen (default -1).
-        The file is created as mkstemp() would do it.
-
-        Returns a file object.  The file has no name, and will cease to
-        exist when it is closed.
-        """
-
-        if dir is None:
-            dir = gettempdir()
-
-        if 'b' in mode:
-            flags = _bin_openflags
-        else:
-            flags = _text_openflags
-
-        (fd, name) = _mkstemp_inner(dir, prefix, suffix, flags)
-        try:
-            _os.unlink(name)
-            return _os.fdopen(fd, mode, bufsize)
-        except:
-            _os.close(fd)
-            raise

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