# coding: utf-8
# AUTO-GENERATED FILE -- DO NOT EDIT

""" This module provides access to operating system functionality that is
standardized by the C Standard and the POSIX standard (a thinly
disguised Unix interface).  Refer to the library manual and
corresponding Unix manual entries for more information on calls. """

CLD_CONTINUED = 6
CLD_DUMPED = 3
CLD_EXITED = 1
CLD_TRAPPED = 4

class DirEntry(object):

  def inode(self):
    """ Return inode of the entry; cached per entry. """
    pass

  def is_dir(self, follow_symlinks=True):
    """ Return True if the entry is a directory; cached per entry. """
    pass

  def is_file(self, follow_symlinks=True):
    """ Return True if the entry is a file; cached per entry. """
    pass

  def is_symlink(self):
    """ Return True if the entry is a symbolic link; cached per entry. """
    pass

  name = None
  path = None

  def stat(self, follow_symlinks=True):
    """ Return stat_result object for the entry; cached per entry. """
    pass

EX_CANTCREAT = 73
EX_CONFIG = 78
EX_DATAERR = 65
EX_IOERR = 74
EX_NOHOST = 68
EX_NOINPUT = 66
EX_NOPERM = 77
EX_NOUSER = 67
EX_OK = 0
EX_OSERR = 71
EX_OSFILE = 72
EX_PROTOCOL = 76
EX_SOFTWARE = 70
EX_TEMPFAIL = 75
EX_UNAVAILABLE = 69
EX_USAGE = 64
F_LOCK = 1
F_OK = 0
F_TEST = 3
F_TLOCK = 2
F_ULOCK = 0
GRND_NONBLOCK = 1
GRND_RANDOM = 2
NGROUPS_MAX = 65536
O_ACCMODE = 3
O_APPEND = 1024
O_ASYNC = 8192
O_CLOEXEC = 524288
O_CREAT = 64
O_DIRECT = 65536
O_DIRECTORY = 16384
O_DSYNC = 4096
O_EXCL = 128
O_LARGEFILE = 0
O_NDELAY = 2048
O_NOATIME = 262144
O_NOCTTY = 256
O_NOFOLLOW = 32768
O_NONBLOCK = 2048
O_PATH = 2097152
O_RDONLY = 0
O_RDWR = 2
O_RSYNC = 1052672
O_SYNC = 1052672
O_TMPFILE = 4210688
O_TRUNC = 512
O_WRONLY = 1
POSIX_FADV_DONTNEED = 4
POSIX_FADV_NOREUSE = 5
POSIX_FADV_NORMAL = 0
POSIX_FADV_RANDOM = 1
POSIX_FADV_SEQUENTIAL = 2
POSIX_FADV_WILLNEED = 3
PRIO_PGRP = 1
PRIO_PROCESS = 0
PRIO_USER = 2
P_ALL = 0
P_PGID = 2
P_PID = 1
RTLD_DEEPBIND = 8
RTLD_GLOBAL = 256
RTLD_LAZY = 1
RTLD_LOCAL = 0
RTLD_NODELETE = 4096
RTLD_NOLOAD = 4
RTLD_NOW = 2
RWF_DSYNC = 2
RWF_HIPRI = 1
RWF_NOWAIT = 8
RWF_SYNC = 4
R_OK = 4
SCHED_BATCH = 3
SCHED_FIFO = 1
SCHED_IDLE = 5
SCHED_OTHER = 0
SCHED_RESET_ON_FORK = 1073741824
SCHED_RR = 2
SEEK_DATA = 3
SEEK_HOLE = 4
ST_APPEND = 256
ST_MANDLOCK = 64
ST_NOATIME = 1024
ST_NODEV = 4
ST_NODIRATIME = 2048
ST_NOEXEC = 8
ST_NOSUID = 2
ST_RDONLY = 1
ST_RELATIME = 4096
ST_SYNCHRONOUS = 16
ST_WRITE = 128
TMP_MAX = 238328
WCONTINUED = 8

def WCOREDUMP(status):
  """ Return True if the process returning status was dumped to a core file. """
  pass

WEXITED = 4

def WEXITSTATUS(status):
  """ Return the process return code from status. """
  pass

def WIFCONTINUED(status):
  """ Return True if a particular process was continued from a job control stop.
  
  Return True if the process returning status was continued from a
  job control stop. """
  pass

def WIFEXITED(status):
  """ Return True if the process returning status exited via the exit() system call. """
  pass

def WIFSIGNALED(status):
  """ Return True if the process returning status was terminated by a signal. """
  pass

def WIFSTOPPED(status):
  """ Return True if the process returning status was stopped. """
  pass

WNOHANG = 1
WNOWAIT = 16777216
WSTOPPED = 2

def WSTOPSIG(status):
  """ Return the signal that stopped the process that provided the status value. """
  pass

def WTERMSIG(status):
  """ Return the signal that terminated the process that provided the status value. """
  pass

WUNTRACED = 2
W_OK = 2
XATTR_CREATE = 1
XATTR_REPLACE = 2
XATTR_SIZE_MAX = 65536
X_OK = 1
__doc__ = """This module provides access to operating system functionality that is
standardized by the C Standard and the POSIX standard (a thinly
disguised Unix interface).  Refer to the library manual and
corresponding Unix manual entries for more information on calls."""

class __loader__(object):
  """ Meta path import for built-in modules.
  
      All methods are either class or static methods to avoid the need to
      instantiate the class.
  
       """

  def create_module(self, spec):
    """ Create a built-in module """
    pass

  def exec_module(self, module):
    """ Exec a built-in module """
    pass

  def find_module(self, fullname, path=None):
    """ Find the built-in module.
    
            If 'path' is ever specified then the search is considered a failure.
    
            This method is deprecated.  Use find_spec() instead.
    
             """
    pass

  def find_spec(self, fullname, path=None, target=None):
    pass

  def get_code(self, fullname):
    """ Return None as built-in modules do not have code objects. """
    pass

  def get_source(self, fullname):
    """ Return None as built-in modules do not have source code. """
    pass

  def is_package(self, fullname):
    """ Return False as built-in modules are never packages. """
    pass

  def load_module(self, fullname):
    """ Load the specified module into sys.modules and return it.
    
        This method is deprecated.  Use loader.exec_module instead.
    
         """
    pass

  def module_repr(self, module):
    """ Return repr for the module.
    
            The method is deprecated.  The import machinery does the job itself.
    
             """
    pass

__name__ = 'posix'
__package__ = ''
__spec__ = None

def _exit(status):
  """ Exit to the system with specified status, without normal exit processing. """
  pass

_have_functions = []

def abort():
  """ Abort the interpreter immediately.
  
  This function 'dumps core' or otherwise fails in the hardest way possible
  on the hosting operating system.  This function never returns. """
  pass

def access(path, mode, dir_fd=None, effective_ids=False, follow_symlinks=True):
  """ Use the real uid/gid to test for access to a path.
  
    path
      Path to be tested; can be string, bytes, or a path-like object.
    mode
      Operating-system mode bitfield.  Can be F_OK to test existence,
      or the inclusive-OR of R_OK, W_OK, and X_OK.
    dir_fd
      If not None, it should be a file descriptor open to a directory,
      and path should be relative; path will then be relative to that
      directory.
    effective_ids
      If True, access will use the effective uid/gid instead of
      the real uid/gid.
    follow_symlinks
      If False, and the last element of the path is a symbolic link,
      access will examine the symbolic link itself instead of the file
      the link points to.
  
  dir_fd, effective_ids, and follow_symlinks may not be implemented
    on your platform.  If they are unavailable, using them will raise a
    NotImplementedError.
  
  Note that most operations will use the effective uid/gid, therefore this
    routine can be used in a suid/sgid environment to test if the invoking user
    has the specified access to the path. """
  pass

def chdir(path):
  """ Change the current working directory to the specified path.
  
  path may always be specified as a string.
  On some platforms, path may also be specified as an open file descriptor.
    If this functionality is unavailable, using it raises an exception. """
  pass

def chmod(path, mode, dir_fd=None, follow_symlinks=True):
  """ Change the access permissions of a file.
  
    path
      Path to be modified.  May always be specified as a str, bytes, or a path-like object.
      On some platforms, path may also be specified as an open file descriptor.
      If this functionality is unavailable, using it raises an exception.
    mode
      Operating-system mode bitfield.
    dir_fd
      If not None, it should be a file descriptor open to a directory,
      and path should be relative; path will then be relative to that
      directory.
    follow_symlinks
      If False, and the last element of the path is a symbolic link,
      chmod will modify the symbolic link itself instead of the file
      the link points to.
  
  It is an error to use dir_fd or follow_symlinks when specifying path as
    an open file descriptor.
  dir_fd and follow_symlinks may not be implemented on your platform.
    If they are unavailable, using them will raise a NotImplementedError. """
  pass

def chown(path, uid, gid, dir_fd=None, follow_symlinks=True):
  """ Change the owner and group id of path to the numeric uid and gid.\\
  
    path
      Path to be examined; can be string, bytes, a path-like object, or open-file-descriptor int.
    dir_fd
      If not None, it should be a file descriptor open to a directory,
      and path should be relative; path will then be relative to that
      directory.
    follow_symlinks
      If False, and the last element of the path is a symbolic link,
      stat will examine the symbolic link itself instead of the file
      the link points to.
  
  path may always be specified as a string.
  On some platforms, path may also be specified as an open file descriptor.
    If this functionality is unavailable, using it raises an exception.
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  If follow_symlinks is False, and the last element of the path is a symbolic
    link, chown will modify the symbolic link itself instead of the file the
    link points to.
  It is an error to use dir_fd or follow_symlinks when specifying path as
    an open file descriptor.
  dir_fd and follow_symlinks may not be implemented on your platform.
    If they are unavailable, using them will raise a NotImplementedError. """
  pass

def chroot(path):
  """ Change root directory to path. """
  pass

def close(fd):
  """ Close a file descriptor. """
  pass

def closerange(fd_low, fd_high):
  """ Closes all file descriptors in [fd_low, fd_high), ignoring errors. """
  pass

def confstr(name):
  """ Return a string-valued system configuration variable. """
  pass

confstr_names = {}

def cpu_count(arg0):
  """ Return the number of CPUs in the system; return None if indeterminable.
  
  This number is not equivalent to the number of CPUs the current process can
  use.  The number of usable CPUs can be obtained with
  ``len(os.sched_getaffinity(0))`` """
  pass

def ctermid():
  """ Return the name of the controlling terminal for this process. """
  pass

def device_encoding(fd):
  """ Return a string describing the encoding of a terminal's file descriptor.
  
  The file descriptor must be attached to a terminal.
  If the device is not a terminal, return None. """
  pass

def dup(fd):
  """ Return a duplicate of a file descriptor. """
  pass

def dup2(fd, fd2, inheritable=True):
  """ Duplicate file descriptor. """
  pass

environ = {}

class error(Exception):
  """ Base class for I/O related errors. """

  def __init__(self, *args, **kwargs):
    pass

  characters_written = property(None, None, None,
                                )

  errno = None
  filename = None
  filename2 = None
  strerror = None

def execv(path, argv):
  """ Execute an executable path with arguments, replacing current process.
  
    path
      Path of executable file.
    argv
      Tuple or list of strings. """
  pass

def execve(path, argv, env):
  """ Execute an executable path with arguments, replacing current process.
  
    path
      Path of executable file.
    argv
      Tuple or list of strings.
    env
      Dictionary of strings mapping to strings. """
  pass

def fchdir(fd):
  """ Change to the directory of the given file descriptor.
  
  fd must be opened on a directory, not a file.
  Equivalent to os.chdir(fd). """
  pass

def fchmod(fd, mode):
  """ Change the access permissions of the file given by file descriptor fd.
  
  Equivalent to os.chmod(fd, mode). """
  pass

def fchown(fd, uid, gid):
  """ Change the owner and group id of the file specified by file descriptor.
  
  Equivalent to os.chown(fd, uid, gid). """
  pass

def fdatasync(fd):
  """ Force write of fd to disk without forcing update of metadata. """
  pass

def fork():
  """ Fork a child process.
  
  Return 0 to child process and PID of child to parent process. """
  pass

def forkpty():
  """ Fork a new process with a new pseudo-terminal as controlling tty.
  
  Returns a tuple of (pid, master_fd).
  Like fork(), return pid of 0 to the child process,
  and pid of child to the parent process.
  To both, return fd of newly opened pseudo-terminal. """
  pass

def fpathconf(fd, name):
  """ Return the configuration limit name for the file descriptor fd.
  
  If there is no limit, return -1. """
  pass

def fspath(path):
  """ Return the file system path representation of the object.
  
  If the object is str or bytes, then allow it to pass through as-is. If the
  object defines __fspath__(), then return the result of that method. All other
  types raise a TypeError. """
  pass

def fstat(fd):
  """ Perform a stat system call on the given file descriptor.
  
  Like stat(), but for an open file descriptor.
  Equivalent to os.stat(fd). """
  pass

def fstatvfs(fd):
  """ Perform an fstatvfs system call on the given fd.
  
  Equivalent to statvfs(fd). """
  pass

def fsync(fd):
  """ Force write of fd to disk. """
  pass

def ftruncate(fd, length):
  """ Truncate a file, specified by file descriptor, to a specific length. """
  pass

def get_blocking(fd):
  """ get_blocking(fd) -> bool
  
  Get the blocking mode of the file descriptor:
  False if the O_NONBLOCK flag is set, True if the flag is cleared. """
  return None

def get_inheritable(fd):
  """ Get the close-on-exe flag of the specified file descriptor. """
  pass

def get_terminal_size():
  """ Return the size of the terminal window as (columns, lines).
  
  The optional argument fd (default standard output) specifies
  which file descriptor should be queried.
  
  If the file descriptor is not connected to a terminal, an OSError
  is thrown.
  
  This function will only be defined if an implementation is
  available for this system.
  
  shutil.get_terminal_size is the high-level function which should 
  normally be used, os.get_terminal_size is the low-level implementation. """
  pass

def getcwd():
  """ Return a unicode string representing the current working directory. """
  pass

def getcwdb():
  """ Return a bytes string representing the current working directory. """
  pass

def getegid():
  """ Return the current process's effective group id. """
  pass

def geteuid():
  """ Return the current process's effective user id. """
  pass

def getgid():
  """ Return the current process's group id. """
  pass

def getgrouplist(user, group):
  """ getgrouplist(user, group) -> list of groups to which a user belongs
  
  Returns a list of groups to which a user belongs.
  
      user: username to lookup
      group: base group id of the user """
  return []

def getgroups():
  """ Return list of supplemental group IDs for the process. """
  pass

def getloadavg():
  """ Return average recent system load information.
  
  Return the number of processes in the system run queue averaged over
  the last 1, 5, and 15 minutes as a tuple of three floats.
  Raises OSError if the load average was unobtainable. """
  pass

def getlogin():
  """ Return the actual login name. """
  pass

def getpgid(pid):
  """ Call the system call getpgid(), and return the result. """
  pass

def getpgrp():
  """ Return the current process group id. """
  pass

def getpid():
  """ Return the current process id. """
  pass

def getppid():
  """ Return the parent's process id.
  
  If the parent process has already exited, Windows machines will still
  return its id; others systems will return the id of the 'init' process (1). """
  pass

def getpriority(which, who):
  """ Return program scheduling priority. """
  pass

def getrandom(size, flags=0):
  """ Obtain a series of random bytes. """
  pass

def getresgid():
  """ Return a tuple of the current process's real, effective, and saved group ids. """
  pass

def getresuid():
  """ Return a tuple of the current process's real, effective, and saved user ids. """
  pass

def getsid(pid):
  """ Call the system call getsid(pid) and return the result. """
  pass

def getuid():
  """ Return the current process's user id. """
  pass

def getxattr(path, attribute, follow_symlinks=True):
  """ Return the value of extended attribute attribute on path.
  
  path may be either a string, a path-like object, or an open file descriptor.
  If follow_symlinks is False, and the last element of the path is a symbolic
    link, getxattr will examine the symbolic link itself instead of the file
    the link points to. """
  pass

def initgroups(username, gid):
  """ initgroups(username, gid) -> None
  
  Call the system initgroups() to initialize the group access list with all of
  the groups of which the specified username is a member, plus the specified
  group id. """
  return None

def isatty(fd):
  """ Return True if the fd is connected to a terminal.
  
  Return True if the file descriptor is an open file descriptor
  connected to the slave end of a terminal. """
  pass

def kill(pid, signal):
  """ Kill a process with a signal. """
  pass

def killpg(pgid, signal):
  """ Kill a process group with a signal. """
  pass

def lchown(path, uid, gid):
  """ Change the owner and group id of path to the numeric uid and gid.
  
  This function will not follow symbolic links.
  Equivalent to os.chown(path, uid, gid, follow_symlinks=False). """
  pass

def link(src, dst, src_dir_fd=None, dst_dir_fd=None, follow_symlinks=True):
  """ Create a hard link to a file.
  
  If either src_dir_fd or dst_dir_fd is not None, it should be a file
    descriptor open to a directory, and the respective path string (src or dst)
    should be relative; the path will then be relative to that directory.
  If follow_symlinks is False, and the last element of src is a symbolic
    link, link will create a link to the symbolic link itself instead of the
    file the link points to.
  src_dir_fd, dst_dir_fd, and follow_symlinks may not be implemented on your
    platform.  If they are unavailable, using them will raise a
    NotImplementedError. """
  pass

def listdir(path=None):
  """ Return a list containing the names of the files in the directory.
  
  path can be specified as either str, bytes, or a path-like object.  If path is bytes,
    the filenames returned will also be bytes; in all other circumstances
    the filenames returned will be str.
  If path is None, uses the path='.'.
  On some platforms, path may also be specified as an open file descriptor;\\
    the file descriptor must refer to a directory.
    If this functionality is unavailable, using it raises NotImplementedError.
  
  The list is in arbitrary order.  It does not include the special
  entries '.' and '..' even if they are present in the directory. """
  pass

def listxattr(path=None, follow_symlinks=True):
  """ Return a list of extended attributes on path.
  
  path may be either None, a string, a path-like object, or an open file descriptor.
  if path is None, listxattr will examine the current directory.
  If follow_symlinks is False, and the last element of the path is a symbolic
    link, listxattr will examine the symbolic link itself instead of the file
    the link points to. """
  pass

def lockf(fd, command, length):
  """ Apply, test or remove a POSIX lock on an open file descriptor.
  
    fd
      An open file descriptor.
    command
      One of F_LOCK, F_TLOCK, F_ULOCK or F_TEST.
    length
      The number of bytes to lock, starting at the current position. """
  pass

def lseek(fd, position, how):
  """ Set the position of a file descriptor.  Return the new position.
  
  Return the new cursor position in number of bytes
  relative to the beginning of the file. """
  pass

def lstat(path, dir_fd=None):
  """ Perform a stat system call on the given path, without following symbolic links.
  
  Like stat(), but do not follow symbolic links.
  Equivalent to stat(path, follow_symlinks=False). """
  pass

def major(device):
  """ Extracts a device major number from a raw device number. """
  pass

def makedev(major, minor):
  """ Composes a raw device number from the major and minor device numbers. """
  pass

def minor(device):
  """ Extracts a device minor number from a raw device number. """
  pass

def mkdir(path, mode=511, dir_fd=None):
  """ Create a directory.
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError.
  
  The mode argument is ignored on Windows. """
  pass

def mkfifo(path, mode=438, dir_fd=None):
  """ Create a "fifo" (a POSIX named pipe).
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def mknod(path, mode=384, device=0, dir_fd=None):
  """ Create a node in the file system.
  
  Create a node in the file system (file, device special file or named pipe)
  at path.  mode specifies both the permissions to use and the
  type of node to be created, being combined (bitwise OR) with one of
  S_IFREG, S_IFCHR, S_IFBLK, and S_IFIFO.  If S_IFCHR or S_IFBLK is set on mode,
  device defines the newly created device special file (probably using
  os.makedev()).  Otherwise device is ignored.
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def nice(increment):
  """ Add increment to the priority of process and return the new priority. """
  pass

def open(path, flags, mode=511, dir_fd=None):
  """ Open a file for low level IO.  Returns a file descriptor (integer).
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def openpty():
  """ Open a pseudo-terminal.
  
  Return a tuple of (master_fd, slave_fd) containing open file descriptors
  for both the master and slave ends. """
  pass

def pathconf(path, name):
  """ Return the configuration limit name for the file or directory path.
  
  If there is no limit, return -1.
  On some platforms, path may also be specified as an open file descriptor.
    If this functionality is unavailable, using it raises an exception. """
  pass

pathconf_names = {}

def pipe():
  """ Create a pipe.
  
  Returns a tuple of two file descriptors:
    (read_fd, write_fd) """
  pass

def pipe2(flags):
  """ Create a pipe with flags set atomically.
  
  Returns a tuple of two file descriptors:
    (read_fd, write_fd)
  
  flags can be constructed by ORing together one or more of these values:
  O_NONBLOCK, O_CLOEXEC. """
  pass

def posix_fadvise(fd, offset, length, advice):
  """ Announce an intention to access data in a specific pattern.
  
  Announce an intention to access data in a specific pattern, thus allowing
  the kernel to make optimizations.
  The advice applies to the region of the file specified by fd starting at
  offset and continuing for length bytes.
  advice is one of POSIX_FADV_NORMAL, POSIX_FADV_SEQUENTIAL,
  POSIX_FADV_RANDOM, POSIX_FADV_NOREUSE, POSIX_FADV_WILLNEED, or
  POSIX_FADV_DONTNEED. """
  pass

def posix_fallocate(fd, offset, length):
  """ Ensure a file has allocated at least a particular number of bytes on disk.
  
  Ensure that the file specified by fd encompasses a range of bytes
  starting at offset bytes from the beginning and continuing for length bytes. """
  pass

def pread(fd, length, offset):
  """ Read a number of bytes from a file descriptor starting at a particular offset.
  
  Read length bytes from file descriptor fd, starting at offset bytes from
  the beginning of the file.  The file offset remains unchanged. """
  pass

def preadv(fd, buffers, offset, flags=0):
  """ Reads from a file descriptor into a number of mutable bytes-like objects.
  
  Combines the functionality of readv() and pread(). As readv(), it will
  transfer data into each buffer until it is full and then move on to the next
  buffer in the sequence to hold the rest of the data. Its fourth argument,
  specifies the file offset at which the input operation is to be performed. It
  will return the total number of bytes read (which can be less than the total
  capacity of all the objects).
  
  The flags argument contains a bitwise OR of zero or more of the following flags:
  
  - RWF_HIPRI
  - RWF_NOWAIT
  
  Using non-zero flags requires Linux 4.6 or newer. """
  pass

def putenv(name, value):
  """ Change or add an environment variable. """
  pass

def pwrite(fd, buffer, offset):
  """ Write bytes to a file descriptor starting at a particular offset.
  
  Write buffer to fd, starting at offset bytes from the beginning of
  the file.  Returns the number of bytes writte.  Does not change the
  current file offset. """
  pass

def pwritev(fd, buffers, offset, flags=0):
  """ Writes the contents of bytes-like objects to a file descriptor at a given offset.
  
  Combines the functionality of writev() and pwrite(). All buffers must be a sequence
  of bytes-like objects. Buffers are processed in array order. Entire contents of first
  buffer is written before proceeding to second, and so on. The operating system may
  set a limit (sysconf() value SC_IOV_MAX) on the number of buffers that can be used.
  This function writes the contents of each object to the file descriptor and returns
  the total number of bytes written.
  
  The flags argument contains a bitwise OR of zero or more of the following flags:
  
  - RWF_DSYNC
  - RWF_SYNC
  
  Using non-zero flags requires Linux 4.7 or newer. """
  pass

def read(fd, length):
  """ Read from a file descriptor.  Returns a bytes object. """
  pass

def readlink(path, arg0, dir_fd=None):
  """ readlink(path, *, dir_fd=None) -> path
  
  Return a string representing the path to which the symbolic link points.
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  return None

def readv(fd, buffers):
  """ Read from a file descriptor fd into an iterable of buffers.
  
  The buffers should be mutable buffers accepting bytes.
  readv will transfer data into each buffer until it is full
  and then move on to the next buffer in the sequence to hold
  the rest of the data.
  
  readv returns the total number of bytes read,
  which may be less than the total capacity of all the buffers. """
  pass

def register_at_fork(before=None, after_in_child=None, after_in_parent=None):
  """ Register callables to be called when forking a new process.
  
    before
      A callable to be called in the parent before the fork() syscall.
    after_in_child
      A callable to be called in the child after fork().
    after_in_parent
      A callable to be called in the parent after fork().
  
  'before' callbacks are called in reverse order.
  'after_in_child' and 'after_in_parent' callbacks are called in order. """
  pass

def remove(path, dir_fd=None):
  """ Remove a file (same as unlink()).
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def removexattr(path, attribute, follow_symlinks=True):
  """ Remove extended attribute attribute on path.
  
  path may be either a string, a path-like object, or an open file descriptor.
  If follow_symlinks is False, and the last element of the path is a symbolic
    link, removexattr will modify the symbolic link itself instead of the file
    the link points to. """
  pass

def rename(src, dst, src_dir_fd=None, dst_dir_fd=None):
  """ Rename a file or directory.
  
  If either src_dir_fd or dst_dir_fd is not None, it should be a file
    descriptor open to a directory, and the respective path string (src or dst)
    should be relative; the path will then be relative to that directory.
  src_dir_fd and dst_dir_fd, may not be implemented on your platform.
    If they are unavailable, using them will raise a NotImplementedError. """
  pass

def replace(src, dst, src_dir_fd=None, dst_dir_fd=None):
  """ Rename a file or directory, overwriting the destination.
  
  If either src_dir_fd or dst_dir_fd is not None, it should be a file
    descriptor open to a directory, and the respective path string (src or dst)
    should be relative; the path will then be relative to that directory.
  src_dir_fd and dst_dir_fd, may not be implemented on your platform.
    If they are unavailable, using them will raise a NotImplementedError. """
  pass

def rmdir(path, dir_fd=None):
  """ Remove a directory.
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def scandir(path=None):
  """ Return an iterator of DirEntry objects for given path.
  
  path can be specified as either str, bytes, or a path-like object.  If path
  is bytes, the names of yielded DirEntry objects will also be bytes; in
  all other circumstances they will be str.
  
  If path is None, uses the path='.'. """
  pass

def sched_get_priority_max(policy):
  """ Get the maximum scheduling priority for policy. """
  pass

def sched_get_priority_min(policy):
  """ Get the minimum scheduling priority for policy. """
  pass

def sched_getaffinity(pid):
  """ Return the affinity of the process identified by pid (or the current process if zero).
  
  The affinity is returned as a set of CPU identifiers. """
  pass

def sched_getparam(pid):
  """ Returns scheduling parameters for the process identified by pid.
  
  If pid is 0, returns parameters for the calling process.
  Return value is an instance of sched_param. """
  pass

def sched_getscheduler(pid):
  """ Get the scheduling policy for the process identifiedy by pid.
  
  Passing 0 for pid returns the scheduling policy for the calling process. """
  pass

class sched_param(tuple):
  """ Current has only one field: sched_priority");
  
    sched_priority
      A scheduling parameter. """

  n_fields = 1
  n_sequence_fields = 1
  n_unnamed_fields = 0
  sched_priority = None

def sched_rr_get_interval(pid):
  """ Return the round-robin quantum for the process identified by pid, in seconds.
  
  Value returned is a float. """
  pass

def sched_setaffinity(pid, mask):
  """ Set the CPU affinity of the process identified by pid to mask.
  
  mask should be an iterable of integers identifying CPUs. """
  pass

def sched_setparam(pid, param):
  """ Set scheduling parameters for the process identified by pid.
  
  If pid is 0, sets parameters for the calling process.
  param should be an instance of sched_param. """
  pass

def sched_setscheduler(pid, policy, param):
  """ Set the scheduling policy for the process identified by pid.
  
  If pid is 0, the calling process is changed.
  param is an instance of sched_param. """
  pass

def sched_yield():
  """ Voluntarily relinquish the CPU. """
  pass

def sendfile(out, in, offset, count):
  """ sendfile(out, in, offset, count) -> byteswritten
  sendfile(out, in, offset, count[, headers][, trailers], flags=0)
              -> byteswritten
  Copy count bytes from file descriptor in to file descriptor out. """
  return None

def set_blocking(fd, blocking):
  """ set_blocking(fd, blocking)
  
  Set the blocking mode of the specified file descriptor.
  Set the O_NONBLOCK flag if blocking is False,
  clear the O_NONBLOCK flag otherwise. """
  pass

def set_inheritable(fd, inheritable):
  """ Set the inheritable flag of the specified file descriptor. """
  pass

def setegid(egid):
  """ Set the current process's effective group id. """
  pass

def seteuid(euid):
  """ Set the current process's effective user id. """
  pass

def setgid(gid):
  """ Set the current process's group id. """
  pass

def setgroups(groups):
  """ Set the groups of the current process to list. """
  pass

def setpgid(pid, pgrp):
  """ Call the system call setpgid(pid, pgrp). """
  pass

def setpgrp():
  """ Make the current process the leader of its process group. """
  pass

def setpriority(which, who, priority):
  """ Set program scheduling priority. """
  pass

def setregid(rgid, egid):
  """ Set the current process's real and effective group ids. """
  pass

def setresgid(rgid, egid, sgid):
  """ Set the current process's real, effective, and saved group ids. """
  pass

def setresuid(ruid, euid, suid):
  """ Set the current process's real, effective, and saved user ids. """
  pass

def setreuid(ruid, euid):
  """ Set the current process's real and effective user ids. """
  pass

def setsid():
  """ Call the system call setsid(). """
  pass

def setuid(uid):
  """ Set the current process's user id. """
  pass

def setxattr(path, attribute, value, flags=0, follow_symlinks=True):
  """ Set extended attribute attribute on path to value.
  
  path may be either a string, a path-like object,  or an open file descriptor.
  If follow_symlinks is False, and the last element of the path is a symbolic
    link, setxattr will modify the symbolic link itself instead of the file
    the link points to. """
  pass

def stat(path, dir_fd=None, follow_symlinks=True):
  """ Perform a stat system call on the given path.
  
    path
      Path to be examined; can be string, bytes, a path-like object or
      open-file-descriptor int.
    dir_fd
      If not None, it should be a file descriptor open to a directory,
      and path should be a relative string; path will then be relative to
      that directory.
    follow_symlinks
      If False, and the last element of the path is a symbolic link,
      stat will examine the symbolic link itself instead of the file
      the link points to.
  
  dir_fd and follow_symlinks may not be implemented
    on your platform.  If they are unavailable, using them will raise a
    NotImplementedError.
  
  It's an error to use dir_fd or follow_symlinks when specifying path as
    an open file descriptor. """
  pass

class stat_result(tuple):
  """ stat_result: Result from stat, fstat, or lstat.
  
  This object may be accessed either as a tuple of
    (mode, ino, dev, nlink, uid, gid, size, atime, mtime, ctime)
  or via the attributes st_mode, st_ino, st_dev, st_nlink, st_uid, and so on.
  
  Posix/windows: If your platform supports st_blksize, st_blocks, st_rdev,
  or st_flags, they are available as attributes only.
  
  See os.stat for more information. """

  n_fields = 19
  n_sequence_fields = 10
  n_unnamed_fields = 3
  st_atime = None
  st_atime_ns = None
  st_blksize = None
  st_blocks = None
  st_ctime = None
  st_ctime_ns = None
  st_dev = None
  st_gid = None
  st_ino = None
  st_mode = None
  st_mtime = None
  st_mtime_ns = None
  st_nlink = None
  st_rdev = None
  st_size = None
  st_uid = None

def statvfs(path):
  """ Perform a statvfs system call on the given path.
  
  path may always be specified as a string.
  On some platforms, path may also be specified as an open file descriptor.
    If this functionality is unavailable, using it raises an exception. """
  pass

class statvfs_result(tuple):
  """ statvfs_result: Result from statvfs or fstatvfs.
  
  This object may be accessed either as a tuple of
    (bsize, frsize, blocks, bfree, bavail, files, ffree, favail, flag, namemax),
  or via the attributes f_bsize, f_frsize, f_blocks, f_bfree, and so on.
  
  See os.statvfs for more information. """

  f_bavail = None
  f_bfree = None
  f_blocks = None
  f_bsize = None
  f_favail = None
  f_ffree = None
  f_files = None
  f_flag = None
  f_frsize = None
  f_fsid = None
  f_namemax = None
  n_fields = 11
  n_sequence_fields = 10
  n_unnamed_fields = 0

def strerror(code):
  """ Translate an error code to a message string. """
  pass

def symlink(src, dst, target_is_directory=False, dir_fd=None):
  """ Create a symbolic link pointing to src named dst.
  
  target_is_directory is required on Windows if the target is to be
    interpreted as a directory.  (On Windows, symlink requires
    Windows 6.0 or greater, and raises a NotImplementedError otherwise.)
    target_is_directory is ignored on non-Windows platforms.
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def sync():
  """ Force write of everything to disk. """
  pass

def sysconf(name):
  """ Return an integer-valued system configuration variable. """
  pass

sysconf_names = {}

def system(command):
  """ Execute the command in a subshell. """
  pass

def tcgetpgrp(fd):
  """ Return the process group associated with the terminal specified by fd. """
  pass

def tcsetpgrp(fd, pgid):
  """ Set the process group associated with the terminal specified by fd. """
  pass

class terminal_size(tuple):
  """ A tuple of (columns, lines) for holding terminal window size """

  columns = None
  lines = None
  n_fields = 2
  n_sequence_fields = 2
  n_unnamed_fields = 0

def times():
  """ Return a collection containing process timing information.
  
  The object returned behaves like a named tuple with these fields:
    (utime, stime, cutime, cstime, elapsed_time)
  All fields are floating point numbers. """
  pass

class times_result(tuple):
  """ times_result: Result from os.times().
  
  This object may be accessed either as a tuple of
    (user, system, children_user, children_system, elapsed),
  or via the attributes user, system, children_user, children_system,
  and elapsed.
  
  See os.times for more information. """

  children_system = None
  children_user = None
  elapsed = None
  n_fields = 5
  n_sequence_fields = 5
  n_unnamed_fields = 0
  system = None
  user = None

def truncate(path, length):
  """ Truncate a file, specified by path, to a specific length.
  
  On some platforms, path may also be specified as an open file descriptor.
    If this functionality is unavailable, using it raises an exception. """
  pass

def ttyname(fd):
  """ Return the name of the terminal device connected to 'fd'.
  
    fd
      Integer file descriptor handle. """
  pass

def umask(mask):
  """ Set the current numeric umask and return the previous umask. """
  pass

def uname():
  """ Return an object identifying the current operating system.
  
  The object behaves like a named tuple with the following fields:
    (sysname, nodename, release, version, machine) """
  pass

class uname_result(tuple):
  """ uname_result: Result from os.uname().
  
  This object may be accessed either as a tuple of
    (sysname, nodename, release, version, machine),
  or via the attributes sysname, nodename, release, version, and machine.
  
  See os.uname for more information. """

  machine = None
  n_fields = 5
  n_sequence_fields = 5
  n_unnamed_fields = 0
  nodename = None
  release = None
  sysname = None
  version = None

def unlink(path, dir_fd=None):
  """ Remove a file (same as remove()).
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  dir_fd may not be implemented on your platform.
    If it is unavailable, using it will raise a NotImplementedError. """
  pass

def unsetenv(name):
  """ Delete an environment variable. """
  pass

def urandom(size):
  """ Return a bytes object containing random bytes suitable for cryptographic use. """
  pass

def utime(path, times=None, ns=None, dir_fd=None, follow_symlinks=True):
  """ Set the access and modified time of path.
  
  path may always be specified as a string.
  On some platforms, path may also be specified as an open file descriptor.
    If this functionality is unavailable, using it raises an exception.
  
  If times is not None, it must be a tuple (atime, mtime);
      atime and mtime should be expressed as float seconds since the epoch.
  If ns is specified, it must be a tuple (atime_ns, mtime_ns);
      atime_ns and mtime_ns should be expressed as integer nanoseconds
      since the epoch.
  If times is None and ns is unspecified, utime uses the current time.
  Specifying tuples for both times and ns is an error.
  
  If dir_fd is not None, it should be a file descriptor open to a directory,
    and path should be relative; path will then be relative to that directory.
  If follow_symlinks is False, and the last element of the path is a symbolic
    link, utime will modify the symbolic link itself instead of the file the
    link points to.
  It is an error to use dir_fd or follow_symlinks when specifying path
    as an open file descriptor.
  dir_fd and follow_symlinks may not be available on your platform.
    If they are unavailable, using them will raise a NotImplementedError. """
  pass

def wait():
  """ Wait for completion of a child process.
  
  Returns a tuple of information about the child process:
      (pid, status) """
  pass

def wait3(options):
  """ Wait for completion of a child process.
  
  Returns a tuple of information about the child process:
    (pid, status, rusage) """
  pass

def wait4(pid, options):
  """ Wait for completion of a specific child process.
  
  Returns a tuple of information about the child process:
    (pid, status, rusage) """
  pass

def waitid(idtype, id, options):
  """ Returns the result of waiting for a process or processes.
  
    idtype
      Must be one of be P_PID, P_PGID or P_ALL.
    id
      The id to wait on.
    options
      Constructed from the ORing of one or more of WEXITED, WSTOPPED
      or WCONTINUED and additionally may be ORed with WNOHANG or WNOWAIT.
  
  Returns either waitid_result or None if WNOHANG is specified and there are
  no children in a waitable state. """
  pass

class waitid_result(tuple):
  """ waitid_result: Result from waitid.
  
  This object may be accessed either as a tuple of
    (si_pid, si_uid, si_signo, si_status, si_code),
  or via the attributes si_pid, si_uid, and so on.
  
  See os.waitid for more information. """

  n_fields = 5
  n_sequence_fields = 5
  n_unnamed_fields = 0
  si_code = None
  si_pid = None
  si_signo = None
  si_status = None
  si_uid = None

def waitpid(pid, options):
  """ Wait for completion of a given child process.
  
  Returns a tuple of information regarding the child process:
      (pid, status)
  
  The options argument is ignored on Windows. """
  pass

def write(fd, data):
  """ Write a bytes object to a file descriptor. """
  pass

def writev(fd, buffers):
  """ Iterate over buffers, and write the contents of each to a file descriptor.
  
  Returns the total number of bytes written.
  buffers must be a sequence of bytes-like objects. """
  pass