expose EPOLLRDHUP (closes #27567)

Doc/library/select.rst

@@ -285,6 +285,9 @@ Edge and Level Trigger Polling (epoll) Objects
    | :const:`EPOLLONESHOT` | Set one-shot behavior. After one event is     |
    |                       | pulled out, the fd is internally disabled     |
    +-----------------------+-----------------------------------------------+
+   | :const:`EPOLLRDHUP`   | Stream socket peer closed connection or shut  |
+   |                       | down writing half of connection.              |
+   +-----------------------+-----------------------------------------------+
    | :const:`EPOLLRDNORM`  | Equivalent to :const:`EPOLLIN`                |
    +-----------------------+-----------------------------------------------+
    | :const:`EPOLLRDBAND`  | Priority data band can be read.               |

Misc/NEWS

@@ -26,6 +26,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #27567: Expose the EPOLLRDHUP constant in the select module.
+
 - Issue #1621: Avoid signed int negation overflow in the "audioop" module.
 
 - Issue #27533: Release GIL in nt._isdir

Modules/selectmodule.c

@@ -2473,12 +2473,12 @@ PyInit_select(void)
     PyModule_AddIntMacro(m, EPOLLPRI);
     PyModule_AddIntMacro(m, EPOLLERR);
     PyModule_AddIntMacro(m, EPOLLHUP);
+    PyModule_AddIntMacro(m, EPOLLRDHUP);
     PyModule_AddIntMacro(m, EPOLLET);
 #ifdef EPOLLONESHOT
     /* Kernel 2.6.2+ */
     PyModule_AddIntMacro(m, EPOLLONESHOT);
 #endif
-    /* PyModule_AddIntConstant(m, "EPOLL_RDHUP", EPOLLRDHUP); */
 
 #ifdef EPOLLRDNORM
     PyModule_AddIntMacro(m, EPOLLRDNORM);