Issue #11657: Fix sending file descriptors over 255 over a multiprocessing Pipe.
Also added some tests.
diff --git a/Modules/_multiprocessing/multiprocessing.c b/Modules/_multiprocessing/multiprocessing.c
index 93f1c48..5b23fc3 100644
--- a/Modules/_multiprocessing/multiprocessing.c
+++ b/Modules/_multiprocessing/multiprocessing.c
@@ -122,7 +122,7 @@
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int));
msg.msg_controllen = cmsg->cmsg_len;
- *CMSG_DATA(cmsg) = fd;
+ * (int *) CMSG_DATA(cmsg) = fd;
Py_BEGIN_ALLOW_THREADS
res = sendmsg(conn, &msg, 0);
@@ -165,7 +165,7 @@
if (res < 0)
return PyErr_SetFromErrno(PyExc_OSError);
- fd = *CMSG_DATA(cmsg);
+ fd = * (int *) CMSG_DATA(cmsg);
return Py_BuildValue("i", fd);
}