Python errno.EPERM Examples

def _copyxattr(src, dst, *, follow_symlinks=True):
        """Copy extended filesystem attributes from `src` to `dst`.

        Overwrite existing attributes.

        If `follow_symlinks` is false, symlinks won't be followed.

        """

        try:
            names = os.listxattr(src, follow_symlinks=follow_symlinks)
        except OSError as e:
            if e.errno not in (errno.ENOTSUP, errno.ENODATA):
                raise
            return
        for name in names:
            try:
                value = os.getxattr(src, name, follow_symlinks=follow_symlinks)
                os.setxattr(dst, name, value, follow_symlinks=follow_symlinks)
            except OSError as e:
                if e.errno not in (errno.EPERM, errno.ENOTSUP, errno.ENODATA):
                    raise 

def _copyxattr(src, dst, *, follow_symlinks=True):
        """Copy extended filesystem attributes from `src` to `dst`.

        Overwrite existing attributes.

        If `follow_symlinks` is false, symlinks won't be followed.

        """

        try:
            names = os.listxattr(src, follow_symlinks=follow_symlinks)
        except OSError as e:
            if e.errno not in (errno.ENOTSUP, errno.ENODATA):
                raise
            return
        for name in names:
            try:
                value = os.getxattr(src, name, follow_symlinks=follow_symlinks)
                os.setxattr(dst, name, value, follow_symlinks=follow_symlinks)
            except OSError as e:
                if e.errno not in (errno.EPERM, errno.ENOTSUP, errno.ENODATA):
                    raise 

def ppid_map():
    """Obtain a {pid: ppid, ...} dict for all running processes in
    one shot. Used to speed up Process.children().
    """
    ret = {}
    procfs_path = get_procfs_path()
    for pid in pids():
        try:
            with open_binary("%s/%s/stat" % (procfs_path, pid)) as f:
                data = f.read()
        except EnvironmentError as err:
            # Note: we should be able to access /stat for all processes
            # aka it's unlikely we'll bump into EPERM, which is good.
            if err.errno not in (errno.ENOENT, errno.ESRCH):
                raise
        else:
            rpar = data.rfind(b')')
            dset = data[rpar + 2:].split()
            ppid = int(dset[1])
            ret[pid] = ppid
    return ret 

def test_initgroups(self):
        # It takes a string and an integer; check that it raises a TypeError
        # for other argument lists.
        self.assertRaises(TypeError, posix.initgroups)
        self.assertRaises(TypeError, posix.initgroups, None)
        self.assertRaises(TypeError, posix.initgroups, 3, "foo")
        self.assertRaises(TypeError, posix.initgroups, "foo", 3, object())

        # If a non-privileged user invokes it, it should fail with OSError
        # EPERM.
        if os.getuid() != 0:
            try:
                name = pwd.getpwuid(posix.getuid()).pw_name
            except KeyError:
                # the current UID may not have a pwd entry
                raise unittest.SkipTest("need a pwd entry")
            try:
                posix.initgroups(name, 13)
            except OSError as e:
                self.assertEqual(e.errno, errno.EPERM)
            else:
                self.fail("Expected OSError to be raised by initgroups") 

def _try_except_permissionerror_iter(try_iter, except_iter):
    if sys.version_info >= (3, 3):
        try:
            for x in try_iter():
                yield x
        except PermissionError as exc:
            for x in except_iter(exc):
                yield x
    else:
        try:
            for x in try_iter():
                yield x
        except EnvironmentError as exc:
            if exc.errno not in (EPERM, EACCES):
                raise
            else:
                for x in except_iter(exc):
                    yield x 

def _test_UNC_path(self):
        with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f:
            f.write("testdata = 'test_trailing_slash'")
        # Create the UNC path, like \\myhost\c$\foo\bar.
        path = os.path.abspath(self.path)
        import socket
        hn = socket.gethostname()
        drive = path[0]
        unc = "\\\\%s\\%s$"%(hn, drive)
        unc += path[2:]
        try:
            os.listdir(unc)
        except OSError as e:
            if e.errno in (errno.EPERM, errno.EACCES):
                # See issue #15338
                self.skipTest("cannot access administrative share %r" % (unc,))
            raise
        sys.path.append(path)
        mod = __import__("test_trailing_slash")
        self.assertEqual(mod.testdata, 'test_trailing_slash')
        unload("test_trailing_slash") 

def test_no_permission_read(self):
    url_map = appinfo.URLMap(url='/',
                             static_files='index.html')

    h = static_files_handler.StaticContentHandler(
        root_path=None,
        url_map=url_map,
        url_pattern='/$')

    os.path.getmtime('/home/appdir/index.html').AndReturn(12345.6)
    error = IOError()
    error.errno = errno.EPERM
    static_files_handler.StaticContentHandler._read_file(
        '/home/appdir/index.html').AndRaise(error)

    self.mox.ReplayAll()
    self.assertResponse('403 Forbidden',
                        {},
                        '',
                        h._handle_path,
                        '/home/appdir/index.html',
                        {'REQUEST_METHOD': 'GET',
                         'PATH_INFO': '/'})
    self.mox.VerifyAll() 

def _test_chflags_regular_file(self, chflags_func, target_file):
        st = os.stat(target_file)
        self.assertTrue(hasattr(st, 'st_flags'))

        # ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
        try:
            chflags_func(target_file, st.st_flags | stat.UF_IMMUTABLE)
        except OSError as err:
            if err.errno != errno.EOPNOTSUPP:
                raise
            msg = 'chflag UF_IMMUTABLE not supported by underlying fs'
            self.skipTest(msg)

        try:
            new_st = os.stat(target_file)
            self.assertEqual(st.st_flags | stat.UF_IMMUTABLE, new_st.st_flags)
            try:
                fd = open(target_file, 'w+')
            except IOError as e:
                self.assertEqual(e.errno, errno.EPERM)
        finally:
            posix.chflags(target_file, st.st_flags) 

def addReader(self, reader):
        if reader in self._readers.keys() or \
           reader in self._continuousPolling._readers:
            return

        fd = reader.fileno()
        try:
            self._asyncioEventloop.add_reader(fd, callWithLogger, reader,
                                              self._readOrWrite, reader,
                                              True)
            self._readers[reader] = fd
        except IOError as e:
            self._unregisterFDInAsyncio(fd)
            if e.errno == errno.EPERM:
                # epoll(7) doesn't support certain file descriptors,
                # e.g. filesystem files, so for those we just poll
                # continuously:
                self._continuousPolling.addReader(reader)
            else:
                raise 

def _pid_exists(self):
        if not self.pid:
            return False

        if sublime.platform() == "windows":
            taskkill = subprocess.Popen(['C:\\Windows\\system32\\tasklist.exe', '/FI', 'PID eq %s' % self.pid, '/FO', 'CSV'], stdout=subprocess.PIPE, stderr=subprocess.PIPE, shell=True)
            (stdout, stderr) = taskkill.communicate()

            failed = taskkill.returncode == 127 or stderr
            found = str(self.pid) in CrossPlatformCodecs.force_decode(stdout)

            return found or failed
        else:
            try:
                os.kill(self.pid, 0)
            except OSError as err:
                if err.errno == errno.ESRCH:
                    return False
                elif err.errno == errno.EPERM:
                    return True
                else:
                    raise
            else:
                return True 

def custom_popen(cmd):
    """Disconnect cmd from parent fds, read only from stdout.
    """
    # needed for py2exe
    creationflags = 0
    if sys.platform == 'win32':
        creationflags = 0x08000000   # CREATE_NO_WINDOW

    # run command
    try:
        p = Popen(cmd, bufsize=0, stdout=PIPE, stdin=PIPE, stderr=STDOUT,
                  creationflags=creationflags)
    except OSError as ex:
        if ex.errno == errno.ENOENT:
            raise RarCannotExec("Unrar not installed? (rarfile.UNRAR_TOOL=%r)" % UNRAR_TOOL)
        if ex.errno == errno.EACCES or ex.errno == errno.EPERM:
            raise RarCannotExec("Cannot execute unrar (rarfile.UNRAR_TOOL=%r)" % UNRAR_TOOL)
        raise
    return p 

def _test_chflags_regular_file(self, chflags_func, target_file):
        st = os.stat(target_file)
        self.assertTrue(hasattr(st, 'st_flags'))

        # ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
        try:
            chflags_func(target_file, st.st_flags | stat.UF_IMMUTABLE)
        except OSError as err:
            if err.errno != errno.EOPNOTSUPP:
                raise
            msg = 'chflag UF_IMMUTABLE not supported by underlying fs'
            self.skipTest(msg)

        try:
            new_st = os.stat(target_file)
            self.assertEqual(st.st_flags | stat.UF_IMMUTABLE, new_st.st_flags)
            try:
                fd = open(target_file, 'w+')
            except IOError as e:
                self.assertEqual(e.errno, errno.EPERM)
        finally:
            posix.chflags(target_file, st.st_flags) 

def test_initgroups(self):
        # It takes a string and an integer; check that it raises a TypeError
        # for other argument lists.
        self.assertRaises(TypeError, posix.initgroups)
        self.assertRaises(TypeError, posix.initgroups, None)
        self.assertRaises(TypeError, posix.initgroups, 3, "foo")
        self.assertRaises(TypeError, posix.initgroups, "foo", 3, object())

        # If a non-privileged user invokes it, it should fail with OSError
        # EPERM.
        if os.getuid() != 0:
            try:
                name = pwd.getpwuid(posix.getuid()).pw_name
            except KeyError:
                # the current UID may not have a pwd entry
                raise unittest.SkipTest("need a pwd entry")
            try:
                posix.initgroups(name, 13)
            except OSError as e:
                self.assertEqual(e.errno, errno.EPERM)
            else:
                self.fail("Expected OSError to be raised by initgroups") 

def test_isfile_strict(self):
        from psutil._common import isfile_strict
        this_file = os.path.abspath(__file__)
        assert isfile_strict(this_file)
        assert not isfile_strict(os.path.dirname(this_file))
        with mock.patch('psutil._common.os.stat',
                        side_effect=OSError(errno.EPERM, "foo")):
            self.assertRaises(OSError, isfile_strict, this_file)
        with mock.patch('psutil._common.os.stat',
                        side_effect=OSError(errno.EACCES, "foo")):
            self.assertRaises(OSError, isfile_strict, this_file)
        with mock.patch('psutil._common.os.stat',
                        side_effect=OSError(errno.ENOENT, "foo")):
            assert not isfile_strict(this_file)
        with mock.patch('psutil._common.stat.S_ISREG', return_value=False):
            assert not isfile_strict(this_file) 

def _test_UNC_path(self):
        with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f:
            f.write("testdata = 'test_trailing_slash'")
        # Create the UNC path, like \\myhost\c$\foo\bar.
        path = os.path.abspath(self.path)
        import socket
        hn = socket.gethostname()
        drive = path[0]
        unc = "\\\\%s\\%s$"%(hn, drive)
        unc += path[2:]
        try:
            os.listdir(unc)
        except OSError as e:
            if e.errno in (errno.EPERM, errno.EACCES):
                # See issue #15338
                self.skipTest("cannot access administrative share %r" % (unc,))
            raise
        sys.path.append(path)
        mod = __import__("test_trailing_slash")
        self.assertEqual(mod.testdata, 'test_trailing_slash')
        unload("test_trailing_slash") 

def _test_UNC_path(self):
        with open(os.path.join(self.path, 'test_trailing_slash.py'), 'w') as f:
            f.write("testdata = 'test_trailing_slash'")
        # Create the UNC path, like \\myhost\c$\foo\bar.
        path = os.path.abspath(self.path)
        import socket
        hn = socket.gethostname()
        drive = path[0]
        unc = "\\\\%s\\%s$"%(hn, drive)
        unc += path[2:]
        try:
            os.listdir(unc)
        except OSError as e:
            if e.errno in (errno.EPERM, errno.EACCES, errno.ENOENT):
                # See issue #15338
                self.skipTest("cannot access administrative share %r" % (unc,))
            raise
        sys.path.append(path)
        mod = __import__("test_trailing_slash")
        self.assertEqual(mod.testdata, 'test_trailing_slash')
        unload("test_trailing_slash") 

def _test_chflags_regular_file(self, chflags_func, target_file):
        st = os.stat(target_file)
        self.assertTrue(hasattr(st, 'st_flags'))

        # ZFS returns EOPNOTSUPP when attempting to set flag UF_IMMUTABLE.
        try:
            chflags_func(target_file, st.st_flags | stat.UF_IMMUTABLE)
        except OSError as err:
            if err.errno != errno.EOPNOTSUPP:
                raise
            msg = 'chflag UF_IMMUTABLE not supported by underlying fs'
            self.skipTest(msg)

        try:
            new_st = os.stat(target_file)
            self.assertEqual(st.st_flags | stat.UF_IMMUTABLE, new_st.st_flags)
            try:
                fd = open(target_file, 'w+')
            except IOError as e:
                self.assertEqual(e.errno, errno.EPERM)
        finally:
            posix.chflags(target_file, st.st_flags) 

def setUpModule():
    global OLD_SYS_PATH
    OLD_SYS_PATH = sys.path[:]

    if site.ENABLE_USER_SITE and not os.path.isdir(site.USER_SITE):
        # need to add user site directory for tests
        try:
            os.makedirs(site.USER_SITE)
            # modify sys.path: will be restored by tearDownModule()
            site.addsitedir(site.USER_SITE)
        except OSError as exc:
            if exc.errno in (errno.EACCES, errno.EPERM):
                raise unittest.SkipTest('unable to create user site directory (%r): %s'
                                        % (site.USER_SITE, exc))
            else:
                raise 

def scan(self, get_vendor, do_portscan, timeout=1):
        try:
            ans, unans = scapy.layers.l2.arping(self.cidr, iface=self.interface_name, timeout=timeout, verbose=False)
            for s, r in ans.res:
                self.neighbours.append(Host(r.psrc, r.src))
        except socket.error as e:
            if e.errno == errno.EPERM:  # Operation not permitted
                message = ("Error: {}\n"
                           "Run as root or - better - set the necessary capabilities for the python interpreter used and tcpdump.\n"
                           "Example: setcap cap_net_raw=eip /usr/bin/python3\n"
                           "Example: setcap cap_net_raw=eip $(which tcpdump)\n"
                           "You may need to install the libcap-progs package").format(e.strerror)
                exit_n(message, 2)
            else:
                raise

        self.neighbours.sort(key=lambda x: x.sort_value)
        if get_vendor:
            self.set_vendor_in_neighbours()
        if do_portscan:
            self.set_open_ports_in_neigbours()
        self.set_is_alive_in_neigbours() 

def wrap_exceptions(fun):
    """Call callable into a try/except clause and translate ENOENT,
    EACCES and EPERM in NoSuchProcess or AccessDenied exceptions.
    """

    def wrapper(self, *args, **kwargs):
        try:
            return fun(self, *args, **kwargs)
        except EnvironmentError as err:
            # support for private module import
            if (NoSuchProcess is None or AccessDenied is None or
                    ZombieProcess is None):
                raise
            # ENOENT (no such file or directory) gets raised on open().
            # ESRCH (no such process) can get raised on read() if
            # process is gone in meantime.
            if err.errno in (errno.ENOENT, errno.ESRCH):
                if not pid_exists(self.pid):
                    raise NoSuchProcess(self.pid, self._name)
                else:
                    raise ZombieProcess(self.pid, self._name, self._ppid)
            if err.errno in (errno.EPERM, errno.EACCES):
                raise AccessDenied(self.pid, self._name)
            raise
    return wrapper 

def _send_signal(self, sig):
            assert not self.pid < 0, self.pid
            if self.pid == 0:
                # see "man 2 kill"
                raise ValueError(
                    "preventing sending signal to process with PID 0 as it "
                    "would affect every process in the process group of the "
                    "calling process (os.getpid()) instead of PID 0")
            try:
                os.kill(self.pid, sig)
            except OSError as err:
                if err.errno == errno.ESRCH:
                    if OPENBSD and pid_exists(self.pid):
                        # We do this because os.kill() lies in case of
                        # zombie processes.
                        raise ZombieProcess(self.pid, self._name, self._ppid)
                    else:
                        self._gone = True
                        raise NoSuchProcess(self.pid, self._name)
                if err.errno in (errno.EPERM, errno.EACCES):
                    raise AccessDenied(self.pid, self._name)
                raise 

def exe(self):
        try:
            return readlink("%s/%s/exe" % (self._procfs_path, self.pid))
        except OSError as err:
            if err.errno in (errno.ENOENT, errno.ESRCH):
                # no such file error; might be raised also if the
                # path actually exists for system processes with
                # low pids (about 0-20)
                if os.path.lexists("%s/%s" % (self._procfs_path, self.pid)):
                    return ""
                else:
                    if not pid_exists(self.pid):
                        raise NoSuchProcess(self.pid, self._name)
                    else:
                        raise ZombieProcess(self.pid, self._name, self._ppid)
            if err.errno in (errno.EPERM, errno.EACCES):
                raise AccessDenied(self.pid, self._name)
            raise 

def wrap_exceptions(fun):
    """Decorator which translates bare OSError and IOError exceptions
    into NoSuchProcess and AccessDenied.
    """
    @functools.wraps(fun)
    def wrapper(self, *args, **kwargs):
        try:
            return fun(self, *args, **kwargs)
        except EnvironmentError as err:
            if err.errno in (errno.EPERM, errno.EACCES):
                raise AccessDenied(self.pid, self._name)
            # ESRCH (no such process) can be raised on read() if
            # process is gone in the meantime.
            if err.errno == errno.ESRCH:
                raise NoSuchProcess(self.pid, self._name)
            # ENOENT (no such file or directory) can be raised on open().
            if err.errno == errno.ENOENT and not os.path.exists("%s/%s" % (
                    self._procfs_path, self.pid)):
                raise NoSuchProcess(self.pid, self._name)
            # Note: zombies will keep existing under /proc until they're
            # gone so there's no way to distinguish them in here.
            raise
    return wrapper 

def wrap_exceptions_procfs(inst):
    """Same as above, for routines relying on reading /proc fs."""
    try:
        yield
    except EnvironmentError as err:
        # ENOENT (no such file or directory) gets raised on open().
        # ESRCH (no such process) can get raised on read() if
        # process is gone in meantime.
        if err.errno in (errno.ENOENT, errno.ESRCH):
            if not pid_exists(inst.pid):
                raise NoSuchProcess(inst.pid, inst._name)
            else:
                raise ZombieProcess(inst.pid, inst._name, inst._ppid)
        if err.errno in (errno.EPERM, errno.EACCES):
            raise AccessDenied(inst.pid, inst._name)
        raise 

def get_all_inodes(self):
        inodes = {}
        for pid in pids():
            try:
                inodes.update(self.get_proc_inodes(pid))
            except OSError as err:
                # os.listdir() is gonna raise a lot of access denied
                # exceptions in case of unprivileged user; that's fine
                # as we'll just end up returning a connection with PID
                # and fd set to None anyway.
                # Both netstat -an and lsof does the same so it's
                # unlikely we can do any better.
                # ENOENT just means a PID disappeared on us.
                if err.errno not in (
                        errno.ENOENT, errno.ESRCH, errno.EPERM, errno.EACCES):
                    raise
        return inodes 

def _try_except_permissionerror_iter(try_iter, except_iter):
    if sys.version_info >= (3, 3):
        try:
            for x in try_iter():
                yield x
        except PermissionError as exc:
            for x in except_iter(exc):
                yield x
    else:
        try:
            for x in try_iter():
                yield x
        except EnvironmentError as exc:
            if exc.errno not in (EPERM, EACCES):
                raise
            else:
                for x in except_iter(exc):
                    yield x 

def filter_command(command, rootwrap_config):
    # Load rootwrap configuration
    try:
        rawconfig = ConfigParser.RawConfigParser()
        rawconfig.read(rootwrap_config)
        rw_config = wrapper.RootwrapConfig(rawconfig)
    except ValueError as exc:
        LOG.error('Incorrect value in %(config)s: %(exc)s',
                  {'config': rootwrap_config, 'exc': exc})
        sys.exit(errno.EINVAL)
    except ConfigParser.Error:
        LOG.error('Incorrect configuration file: %(config)s',
                  {'config': rootwrap_config})
        sys.exit(errno.EINVAL)

    # Check if command matches any of the loaded filters
    filters = wrapper.load_filters(rw_config.filters_path)
    try:
        wrapper.match_filter(filters, command, exec_dirs=rw_config.exec_dirs)
    except wrapper.FilterMatchNotExecutable as exc:
        LOG.error('Command %(command)s is not executable: '
                  '%(path)s (filter match = %(name)s)',
                  {'command': command,
                   'path': exc.match.exec_path,
                   'name': exc.match.name})
        sys.exit(errno.EINVAL)
    except wrapper.NoFilterMatched:
        LOG.error('Unauthorized command: %(cmd)s (no filter matched)',
                  {'cmd': command})
        sys.exit(errno.EPERM) 

def isfile_strict(path):
    """Same as os.path.isfile() but does not swallow EACCES / EPERM
    exceptions, see:
    http://mail.python.org/pipermail/python-dev/2012-June/120787.html
    """
    try:
        st = os.stat(path)
    except OSError as err:
        if err.errno in (errno.EPERM, errno.EACCES):
            raise
        return False
    else:
        return stat.S_ISREG(st.st_mode) 

def is_permission_err(exc):
    """Return True if this is a permission error."""
    assert isinstance(exc, OSError), exc
    # On Python 2 OSError doesn't always have 'winerror'. Sometimes
    # it does, in which case the original exception was WindowsError
    # (which is a subclass of OSError).
    return exc.errno in (errno.EPERM, errno.EACCES) or \
        getattr(exc, "winerror", -1) in (cext.ERROR_ACCESS_DENIED,
                                         cext.ERROR_PRIVILEGE_NOT_HELD) 

def test_memory_info(self):
        mem_1 = psutil.Process(self.pid).memory_info()
        with mock.patch("psutil._psplatform.cext.proc_memory_info",
                        side_effect=OSError(errno.EPERM, "msg")) as fun:
            mem_2 = psutil.Process(self.pid).memory_info()
            self.assertEqual(len(mem_1), len(mem_2))
            for i in range(len(mem_1)):
                self.assertGreaterEqual(mem_1[i], 0)
                self.assertGreaterEqual(mem_2[i], 0)
                self.assertAlmostEqual(mem_1[i], mem_2[i], delta=512)
            assert fun.called