syscall: make pipe work on netbsd

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5504070

src/pkg/syscall/syscall_netbsd.go

@@ -62,13 +62,13 @@ func ParseDirent(buf []byte, max int, names []string) (consumed int, count int,
 	return origlen - len(buf), count, names
 }
 
-//sysnb pipe(p *[2]_C_int) (err error)
+//sysnb pipe2(p *[2]_C_int, flags _C_int) (err error)
 func Pipe(p []int) (err error) {
 	if len(p) != 2 {
 		return EINVAL
 	}
 	var pp [2]_C_int
-	err = pipe(&pp)
+	err = pipe2(&pp, 0)
 	p[0] = int(pp[0])
 	p[1] = int(pp[1])
 	return

src/pkg/syscall/zsyscall_netbsd_386.go

@@ -253,8 +253,8 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func pipe(p *[2]_C_int) (err error) {
-	_, _, e1 := RawSyscall(SYS_PIPE, uintptr(unsafe.Pointer(p)), 0, 0)
+func pipe2(p *[2]_C_int, flags _C_int) (err error) {
+	_, _, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = e1
 	}

src/pkg/syscall/zsyscall_netbsd_amd64.go

@@ -253,8 +253,8 @@ func fcntl(fd int, cmd int, arg int) (val int, err error) {
 
 // THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT
 
-func pipe(p *[2]_C_int) (err error) {
-	_, _, e1 := RawSyscall(SYS_PIPE, uintptr(unsafe.Pointer(p)), 0, 0)
+func pipe2(p *[2]_C_int, flags _C_int) (err error) {
+	_, _, e1 := RawSyscall(SYS_PIPE2, uintptr(unsafe.Pointer(p)), uintptr(flags), 0)
 	if e1 != 0 {
 		err = e1
 	}