Fix tests in test_socket to use correctly CMSG_LEN (GH-9594)
After some failures in AMD64 FreeBSD CURRENT Debug 3.x buildbots
regarding tests in test_socket that are using
testFDPassSeparateMinSpace(), FreeBDS revision 337423 was pointed
out to be the reason the test started to fail.
A close examination of the manpage for cmsg_space(3) reveals that
the number of file descriptors needs to be taken into account when
using CMSG_LEN().
This commit fixes tests in test_socket to use correctly CMSG_LEN, taking
into account the number of FDs.
(cherry picked from commit 7291108d88ea31d205da4db19d202d6cbffc6d93)
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
index bd4fad1..5f9891d 100644
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -3183,10 +3183,11 @@
def testFDPassSeparateMinSpace(self):
# Pass two FDs in two separate arrays, receiving them into the
# minimum space for two arrays.
- self.checkRecvmsgFDs(2,
+ num_fds = 2
+ self.checkRecvmsgFDs(num_fds,
self.doRecvmsg(self.serv_sock, len(MSG),
socket.CMSG_SPACE(SIZEOF_INT) +
- socket.CMSG_LEN(SIZEOF_INT)),
+ socket.CMSG_LEN(SIZEOF_INT * num_fds)),
maxcmsgs=2, ignoreflags=socket.MSG_CTRUNC)
@testFDPassSeparateMinSpace.client_skip