net, syscall: use accept4 and SOCK_CLOEXEC on Linux
R=golang-dev, bradfitz, mikioh.mikioh, dave, minux.ma
CC=golang-dev
https://golang.org/cl/7227043
diff --git a/src/pkg/syscall/syscall_linux_386.go b/src/pkg/syscall/syscall_linux_386.go
index 58bc9b5..a0ded43 100644
--- a/src/pkg/syscall/syscall_linux_386.go
+++ b/src/pkg/syscall/syscall_linux_386.go
@@ -164,6 +164,9 @@
_GETSOCKOPT = 15
_SENDMSG = 16
_RECVMSG = 17
+ _ACCEPT4 = 18
+ _RECVMMSG = 19
+ _SENDMMSG = 20
)
func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (n int, err Errno)
@@ -177,6 +180,14 @@
return
}
+func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) {
+ fd, e := socketcall(_ACCEPT4, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags), 0, 0)
+ if e != 0 {
+ err = e
+ }
+ return
+}
+
func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error) {
_, e := rawsocketcall(_GETSOCKNAME, uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), 0, 0, 0)
if e != 0 {
