io.c: workaround for EPROTOTYPE

* io.c (internal_write_func, internal_writev_func): retry at
  unexpected EPROTOTYPE on macOS, to get rid of a kernel bug.
  [ruby-core:86690] [Bug #14713]

* ext/socket/init.c (rsock_{sendto,send,write}_blocking): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63304 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 11 insertions, 2 deletions

diff --git a/io.c b/io.c
index 5e921a55bd..c0457731d0 100644
--- a/io.c
+++ b/io.c
@@ -945,11 +945,18 @@ internal_read_func(void *ptr)
     return read(iis->fd, iis->buf, iis->capa);
 }
 
+#if defined __APPLE__
+# define do_write_retry(code) do {ret = code;} while (ret == -1 && errno == EPROTOTYPE)
+#else
+# define do_write_retry(code) ret = code
+#endif
 static VALUE
 internal_write_func(void *ptr)
 {
     struct io_internal_write_struct *iis = ptr;
-    return write(iis->fd, iis->buf, iis->capa);
+    ssize_t ret;
+    do_write_retry(write(iis->fd, iis->buf, iis->capa));
+    return (VALUE)ret;
 }
 
 static void*
@@ -963,7 +970,9 @@ static VALUE
 internal_writev_func(void *ptr)
 {
     struct io_internal_writev_struct *iis = ptr;
-    return writev(iis->fd, iis->iov, iis->iovcnt);
+    ssize_t ret;
+    do_write_retry(writev(iis->fd, iis->iov, iis->iovcnt));
+    return (VALUE)ret;
 }
 #endif