BUG/MINOR: cli: fix _getsocks with musl libc
In ticket #1413, the transfer of FDs couldn't correctly work on alpine
linux. After a few tests with musl on another distribution it seems to
be a limitation of this libc.
The number of FD that could be sent per sendmsg was set to 253, which
does not seem to work with musl, decreasing it 252 seems to work
better, so lets set this value everywhere since it does not have that
much impact.
This must be backported in every maintained version.
(cherry picked from commit 148d7a030156ca927e744013dd6fc32b473c1ef6)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit ac1d29e8a67447941b4b1606be865dd6bbdd2b54)
Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/include/haproxy/compat.h b/include/haproxy/compat.h
index dff35b0..4bc783f 100644
--- a/include/haproxy/compat.h
+++ b/include/haproxy/compat.h
@@ -306,9 +306,10 @@
#endif
/* Max number of file descriptors we send in one sendmsg(). Linux seems to be
- * able to send 253 fds per sendmsg(), not sure about the other OSes.
+ * able to send 253 fds per sendmsg(), however musl is limited to 252, not sure
+ * about the other OSes.
*/
-#define MAX_SEND_FD 253
+#define MAX_SEND_FD 252
/* Make the new complex name for the xxhash function easier to remember
* and use.