syscall: GetsockoptInt for darwin, freebsd.

R=rsc
CC=golang-dev
https://golang.org/cl/4298060

src/pkg/syscall/syscall_bsd.go

@@ -149,6 +149,7 @@ func Sleep(ns int64) (errno int) {
 //sys	bind(s int, addr uintptr, addrlen _Socklen) (errno int)
 //sys	connect(s int, addr uintptr, addrlen _Socklen) (errno int)
 //sysnb	socket(domain int, typ int, proto int) (fd int, errno int)
+//sys	getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int)
 //sys	setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int)
 //sysnb	getpeername(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
 //sysnb	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (errno int)
@@ -362,6 +363,13 @@ func Socketpair(domain, typ, proto int) (fd [2]int, errno int) {
 	return
 }
 
+func GetsockoptInt(fd, level, opt int) (value, errno int) {
+	var n int32
+	vallen := _Socklen(4)
+	errno = getsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), &vallen)
+	return int(n), errno
+}
+
 func SetsockoptInt(fd, level, opt int, value int) (errno int) {
 	var n = int32(value)
 	return setsockopt(fd, level, opt, uintptr(unsafe.Pointer(&n)), 4)
@@ -552,7 +560,6 @@ func Sendmsg(fd int, p, oob []byte, to Sockaddr, flags int) (errno int) {
 // TODO: wrap
 //	Acct(name nil-string) (errno int)
 //	Gethostuuid(uuid *byte, timeout *Timespec) (errno int)
-//	Getsockopt(s int, level int, name int, val *byte, vallen *int) (errno int)
 //	Madvise(addr *byte, len int, behav int) (errno int)
 //	Mprotect(addr *byte, len int, prot int) (errno int)
 //	Msync(addr *byte, len int, flags int) (errno int)

src/pkg/syscall/zsyscall_darwin_386.go

-// mksyscall.sh -l32 syscall_bsd.go syscall_darwin.go syscall_darwin_386.go
+// mksyscall.pl -l32 syscall_bsd.go syscall_darwin.go syscall_darwin_386.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
@@ -77,6 +77,14 @@ func socket(domain int, typ int, proto int) (fd int, errno int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	errno = int(e1)
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	errno = int(e1)

src/pkg/syscall/zsyscall_darwin_amd64.go

@@ -77,6 +77,14 @@ func socket(domain int, typ int, proto int) (fd int, errno int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	errno = int(e1)
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	errno = int(e1)

src/pkg/syscall/zsyscall_freebsd_386.go

-// mksyscall.sh -l32 syscall_bsd.go syscall_freebsd.go syscall_freebsd_386.go
+// mksyscall.pl -l32 syscall_bsd.go syscall_freebsd.go syscall_freebsd_386.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
@@ -77,6 +77,14 @@ func socket(domain int, typ int, proto int) (fd int, errno int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	errno = int(e1)
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	errno = int(e1)

src/pkg/syscall/zsyscall_freebsd_amd64.go

-// mksyscall.sh syscall_bsd.go syscall_freebsd.go syscall_freebsd_amd64.go
+// mksyscall.pl syscall_bsd.go syscall_freebsd.go syscall_freebsd_amd64.go
 // MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
 
 package syscall
@@ -77,6 +77,14 @@ func socket(domain int, typ int, proto int) (fd int, errno int) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
+func getsockopt(s int, level int, name int, val uintptr, vallen *_Socklen) (errno int) {
+	_, _, e1 := Syscall6(SYS_GETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen)), 0)
+	errno = int(e1)
+	return
+}
+
+// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
+
 func setsockopt(s int, level int, name int, val uintptr, vallen int) (errno int) {
 	_, _, e1 := Syscall6(SYS_SETSOCKOPT, uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(vallen), 0)
 	errno = int(e1)