1 files changed, 12 insertions, 0 deletions
diff --git a/src/pkg/syscall/syscall_darwin_amd64.go b/src/pkg/syscall/syscall_darwin_amd64.go
index acf7a5554..ed4372304 100644
--- a/src/pkg/syscall/syscall_darwin_amd64.go
+++ b/src/pkg/syscall/syscall_darwin_amd64.go
@@ -39,3 +39,15 @@ func SetKevent(k *Kevent_t, fd, mode, flags int) {
 	k.Filter = int16(mode)
 	k.Flags = uint16(flags)
 }
+
+func (iov *Iovec) SetLen(length int) {
+	iov.Len = uint64(length)
+}
+
+func (msghdr *Msghdr) SetControllen(length int) {
+	msghdr.Controllen = uint32(length)
+}
+
+func (cmsg *Cmsghdr) SetLen(length int) {
+	cmsg.Len = uint32(length)
+}