From 0c46891442c0b4ca593691f62ad1213e022ff00b Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Sun, 14 Jun 2020 17:09:59 +0000
Subject: [PATCH] hurd: Make send* cancellation points

* sysdeps/mach/hurd/send.c (__send): Make the __socket_send call
a cancellation point.
* sysdeps/mach/hurd/sendto.c (__sendto): Likewise.
* sysdeps/mach/hurd/sendmsg.c (__libc_sendmsg): Likewise.
---
 sysdeps/mach/hurd/send.c    | 4 ++++
 sysdeps/mach/hurd/sendmsg.c | 3 +++
 sysdeps/mach/hurd/sendto.c  | 3 +++
 3 files changed, 10 insertions(+)

diff --git a/sysdeps/mach/hurd/send.c b/sysdeps/mach/hurd/send.c
index af00276..78edbc2 100644
--- a/sysdeps/mach/hurd/send.c
+++ b/sysdeps/mach/hurd/send.c
@@ -20,6 +20,7 @@
 #include <hurd.h>
 #include <hurd/socket.h>
 #include <hurd/fd.h>
+#include <sysdep-cancel.h>
 
 /* Send N bytes of BUF to socket FD.  Returns the number sent or -1.  */
 ssize_t
@@ -27,11 +28,14 @@ __send (int fd, const void *buf, size_t n, int flags)
 {
   error_t err;
   size_t wrote;
+  int cancel_oldtype;
 
+  cancel_oldtype = LIBC_CANCEL_ASYNC();
   err = HURD_DPORT_USE (fd, __socket_send (port, MACH_PORT_NULL,
 					   flags, buf, n,
 					   NULL, MACH_MSG_TYPE_COPY_SEND, 0,
 					   NULL, 0, &wrote));
+  LIBC_CANCEL_RESET (cancel_oldtype);
 
   if (err == MIG_BAD_ID || err == EOPNOTSUPP)
     /* The file did not grok the socket protocol.  */
diff --git a/sysdeps/mach/hurd/sendmsg.c b/sysdeps/mach/hurd/sendmsg.c
index dfc5afd..37ab7f3 100644
--- a/sysdeps/mach/hurd/sendmsg.c
+++ b/sysdeps/mach/hurd/sendmsg.c
@@ -24,6 +24,7 @@
 #include <hurd/fd.h>
 #include <hurd/ifsock.h>
 #include <hurd/socket.h>
+#include <sysdep-cancel.h>
 #include "hurd/hurdsocket.h"
 
 /* Send a message described MESSAGE on socket FD.
@@ -184,6 +185,7 @@ __libc_sendmsg (int fd, const struct msghdr *message, int flags)
 			  if (! err)
 			    {
 			      /* Send the data.  */
+			      int cancel_oldtype = LIBC_CANCEL_ASYNC();
 			      err = __socket_send (port, aport,
 						   flags, data.ptr, len,
 						   ports,
@@ -192,6 +194,7 @@ __libc_sendmsg (int fd, const struct msghdr *message, int flags)
 						   message->msg_control,
 						   message->msg_controllen,
 						   &amount);
+			      LIBC_CANCEL_RESET (cancel_oldtype);
 			      __mach_port_deallocate (__mach_task_self (),
 						      aport);
 			    }
diff --git a/sysdeps/mach/hurd/sendto.c b/sysdeps/mach/hurd/sendto.c
index 2f26b36..a5faf8e 100644
--- a/sysdeps/mach/hurd/sendto.c
+++ b/sysdeps/mach/hurd/sendto.c
@@ -22,6 +22,7 @@
 #include <hurd/fd.h>
 #include <hurd/ifsock.h>
 #include <hurd/socket.h>
+#include <sysdep-cancel.h>
 #include "hurd/hurdsocket.h"
 
 /* Send N bytes of BUF on socket FD to peer at address ADDR (which is
@@ -82,11 +83,13 @@ __sendto (int fd,
 			  if (! err)
 			    {
 			      /* Send the data.  */
+			      int cancel_oldtype = LIBC_CANCEL_ASYNC();
 			      err = __socket_send (port, aport,
 						   flags, buf, n,
 						   NULL,
 						   MACH_MSG_TYPE_COPY_SEND, 0,
 						   NULL, 0, &wrote);
+			      LIBC_CANCEL_RESET (cancel_oldtype);
 			    }
 			  err;
 			}));
-- 
2.7.4