Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/@python2/posix.pyi

@@ -0,0 +1,201 @@
+from _typeshed import FileDescriptorLike
+from typing import IO, AnyStr, Dict, List, Mapping, NamedTuple, Optional, Sequence, Tuple, TypeVar, Union
+
+error = OSError
+
+confstr_names: Dict[str, int]
+environ: Dict[str, str]
+pathconf_names: Dict[str, int]
+sysconf_names: Dict[str, int]
+
+_T = TypeVar("_T")
+
+EX_CANTCREAT: int
+EX_CONFIG: int
+EX_DATAERR: int
+EX_IOERR: int
+EX_NOHOST: int
+EX_NOINPUT: int
+EX_NOPERM: int
+EX_NOUSER: int
+EX_OK: int
+EX_OSERR: int
+EX_OSFILE: int
+EX_PROTOCOL: int
+EX_SOFTWARE: int
+EX_TEMPFAIL: int
+EX_UNAVAILABLE: int
+EX_USAGE: int
+F_OK: int
+NGROUPS_MAX: int
+O_APPEND: int
+O_ASYNC: int
+O_CREAT: int
+O_DIRECT: int
+O_DIRECTORY: int
+O_DSYNC: int
+O_EXCL: int
+O_LARGEFILE: int
+O_NDELAY: int
+O_NOATIME: int
+O_NOCTTY: int
+O_NOFOLLOW: int
+O_NONBLOCK: int
+O_RDONLY: int
+O_RDWR: int
+O_RSYNC: int
+O_SYNC: int
+O_TRUNC: int
+O_WRONLY: int
+R_OK: int
+TMP_MAX: int
+WCONTINUED: int
+WNOHANG: int
+WUNTRACED: int
+W_OK: int
+X_OK: int
+
+def WCOREDUMP(status: int) -> bool: ...
+def WEXITSTATUS(status: int) -> bool: ...
+def WIFCONTINUED(status: int) -> bool: ...
+def WIFEXITED(status: int) -> bool: ...
+def WIFSIGNALED(status: int) -> bool: ...
+def WIFSTOPPED(status: int) -> bool: ...
+def WSTOPSIG(status: int) -> bool: ...
+def WTERMSIG(status: int) -> bool: ...
+
+class stat_result(object):
+    n_fields: int
+    n_sequence_fields: int
+    n_unnamed_fields: int
+    st_mode: int
+    st_ino: int
+    st_dev: int
+    st_nlink: int
+    st_uid: int
+    st_gid: int
+    st_size: int
+    st_atime: int
+    st_mtime: int
+    st_ctime: int
+
+class statvfs_result(NamedTuple):
+    f_bsize: int
+    f_frsize: int
+    f_blocks: int
+    f_bfree: int
+    f_bavail: int
+    f_files: int
+    f_ffree: int
+    f_favail: int
+    f_flag: int
+    f_namemax: int
+
+def _exit(status: int) -> None: ...
+def abort() -> None: ...
+def access(path: unicode, mode: int) -> bool: ...
+def chdir(path: unicode) -> None: ...
+def chmod(path: unicode, mode: int) -> None: ...
+def chown(path: unicode, uid: int, gid: int) -> None: ...
+def chroot(path: unicode) -> None: ...
+def close(fd: int) -> None: ...
+def closerange(fd_low: int, fd_high: int) -> None: ...
+def confstr(name: Union[str, int]) -> str: ...
+def ctermid() -> str: ...
+def dup(fd: int) -> int: ...
+def dup2(fd: int, fd2: int) -> None: ...
+def execv(path: str, args: Sequence[str], env: Mapping[str, str]) -> None: ...
+def execve(path: str, args: Sequence[str], env: Mapping[str, str]) -> None: ...
+def fchdir(fd: FileDescriptorLike) -> None: ...
+def fchmod(fd: int, mode: int) -> None: ...
+def fchown(fd: int, uid: int, gid: int) -> None: ...
+def fdatasync(fd: FileDescriptorLike) -> None: ...
+def fdopen(fd: int, mode: str = ..., bufsize: int = ...) -> IO[str]: ...
+def fork() -> int: ...
+def forkpty() -> Tuple[int, int]: ...
+def fpathconf(fd: int, name: str) -> None: ...
+def fstat(fd: int) -> stat_result: ...
+def fstatvfs(fd: int) -> statvfs_result: ...
+def fsync(fd: FileDescriptorLike) -> None: ...
+def ftruncate(fd: int, length: int) -> None: ...
+def getcwd() -> str: ...
+def getcwdu() -> unicode: ...
+def getegid() -> int: ...
+def geteuid() -> int: ...
+def getgid() -> int: ...
+def getgroups() -> List[int]: ...
+def getloadavg() -> Tuple[float, float, float]: ...
+def getlogin() -> str: ...
+def getpgid(pid: int) -> int: ...
+def getpgrp() -> int: ...
+def getpid() -> int: ...
+def getppid() -> int: ...
+def getresgid() -> Tuple[int, int, int]: ...
+def getresuid() -> Tuple[int, int, int]: ...
+def getsid(pid: int) -> int: ...
+def getuid() -> int: ...
+def initgroups(username: str, gid: int) -> None: ...
+def isatty(fd: int) -> bool: ...
+def kill(pid: int, sig: int) -> None: ...
+def killpg(pgid: int, sig: int) -> None: ...
+def lchown(path: unicode, uid: int, gid: int) -> None: ...
+def link(source: unicode, link_name: str) -> None: ...
+def listdir(path: AnyStr) -> List[AnyStr]: ...
+def lseek(fd: int, pos: int, how: int) -> None: ...
+def lstat(path: unicode) -> stat_result: ...
+def major(device: int) -> int: ...
+def makedev(major: int, minor: int) -> int: ...
+def minor(device: int) -> int: ...
+def mkdir(path: unicode, mode: int = ...) -> None: ...
+def mkfifo(path: unicode, mode: int = ...) -> None: ...
+def mknod(filename: unicode, mode: int = ..., device: int = ...) -> None: ...
+def nice(increment: int) -> int: ...
+def open(file: unicode, flags: int, mode: int = ...) -> int: ...
+def openpty() -> Tuple[int, int]: ...
+def pathconf(path: unicode, name: str) -> str: ...
+def pipe() -> Tuple[int, int]: ...
+def popen(command: str, mode: str = ..., bufsize: int = ...) -> IO[str]: ...
+def putenv(varname: str, value: str) -> None: ...
+def read(fd: int, n: int) -> str: ...
+def readlink(path: _T) -> _T: ...
+def remove(path: unicode) -> None: ...
+def rename(src: unicode, dst: unicode) -> None: ...
+def rmdir(path: unicode) -> None: ...
+def setegid(egid: int) -> None: ...
+def seteuid(euid: int) -> None: ...
+def setgid(gid: int) -> None: ...
+def setgroups(groups: Sequence[int]) -> None: ...
+def setpgid(pid: int, pgrp: int) -> None: ...
+def setpgrp() -> None: ...
+def setregid(rgid: int, egid: int) -> None: ...
+def setresgid(rgid: int, egid: int, sgid: int) -> None: ...
+def setresuid(ruid: int, euid: int, suid: int) -> None: ...
+def setreuid(ruid: int, euid: int) -> None: ...
+def setsid() -> None: ...
+def setuid(pid: int) -> None: ...
+def stat(path: unicode) -> stat_result: ...
+def statvfs(path: unicode) -> statvfs_result: ...
+def stat_float_times(fd: int) -> None: ...
+def strerror(code: int) -> str: ...
+def symlink(source: unicode, link_name: unicode) -> None: ...
+def sysconf(name: Union[str, int]) -> int: ...
+def system(command: unicode) -> int: ...
+def tcgetpgrp(fd: int) -> int: ...
+def tcsetpgrp(fd: int, pg: int) -> None: ...
+def times() -> Tuple[float, float, float, float, float]: ...
+def tmpfile() -> IO[str]: ...
+def ttyname(fd: int) -> str: ...
+def umask(mask: int) -> int: ...
+def uname() -> Tuple[str, str, str, str, str]: ...
+def unlink(path: unicode) -> None: ...
+def unsetenv(varname: str) -> None: ...
+def urandom(n: int) -> str: ...
+def utime(path: unicode, times: Optional[Tuple[int, int]]) -> None: ...
+def wait() -> int: ...
+
+_r = Tuple[float, float, int, int, int, int, int, int, int, int, int, int, int, int, int, int]
+
+def wait3(options: int) -> Tuple[int, int, _r]: ...
+def wait4(pid: int, options: int) -> Tuple[int, int, _r]: ...
+def waitpid(pid: int, options: int) -> int: ...
+def write(fd: int, str: str) -> int: ...