chg: replace mercurial.util.recvfds() by simpler pure Python implementation On Python 3, we have socket.socket.recvmsg(). This makes it possible to receive FDs in pure Python code. The new code behaves like the previous implementations, except that it?s more strict about the format of the ancillary data. This works because we know in which format the FDs are passed. Because the code is (and always has been) specific to chg (payload is 1 byte, number of passed FDs is limited) and we now have only one implementation and the code is very short, I decided to stop exposing a function in mercurial.util. Note on terminology: The SCM_RIGHTS mechanism is used to share open file descriptions to another process over a socket. The sending side passes an array of file descriptors and the receiving side receives an array of file descriptors. The file descriptors are different in general on both sides but refer to the same open file descriptions. The two terms are often conflated, even in the official documentation. That?s why I used ?FD? above, which could mean both ?file descriptor? and ?file description?.

     1

from typing import (

     2

    AnyStr,

     3

    IO,

     4

    List,

     5

    Sequence,

     6

)

     7

     8

version: int

     9

    10

class stat:

    11

    st_dev: int

    12

    st_mode: int

    13

    st_nlink: int

    14

    st_size: int

    15

    st_mtime: int

    16

    st_ctime: int

    17

    18

def listdir(path: bytes, st: bool, skip: bool) -> List[stat]: ...

    19

def posixfile(name: AnyStr, mode: bytes, buffering: int) -> IO: ...

    20

def statfiles(names: Sequence[bytes]) -> List[stat]: ...

    21

def setprocname(name: bytes) -> None: ...

    22

def getfstype(path: bytes) -> bytes: ...

    23

def getfsmountpoint(path: bytes) -> bytes: ...

    24

def unblocksignal(sig: int) -> None: ...

    25

def isgui() -> bool: ...