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// Copyright 2021 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build dragonfly || freebsd || linux || netbsd || openbsd || solaris
package unix_test
import (
"testing"
"golang.org/x/sys/unix"
)
func TestPipe2(t *testing.T) {
const s = "hello"
var pipes [2]int
err := unix.Pipe2(pipes[:], 0)
if err != nil {
t.Fatalf("pipe2: %v", err)
}
r := pipes[0]
w := pipes[1]
go func() {
n, err := unix.Write(w, []byte(s))
if err != nil {
t.Errorf("bad write: %v", err)
return
}
if n != len(s) {
t.Errorf("bad write count: %d", n)
return
}
err = unix.Close(w)
if err != nil {
t.Errorf("bad close: %v", err)
return
}
}()
var buf [10 + len(s)]byte
n, err := unix.Read(r, buf[:])
if err != nil {
t.Fatalf("bad read: %v", err)
}
if n != len(s) {
t.Fatalf("bad read count: %d", n)
}
if string(buf[:n]) != s {
t.Fatalf("bad contents: %s", string(buf[:n]))
}
err = unix.Close(r)
if err != nil {
t.Fatalf("bad close: %v", err)
}
}
func checkNonblocking(t *testing.T, fd int, name string) {
t.Helper()
flags, err := unix.FcntlInt(uintptr(fd), unix.F_GETFL, 0)
if err != nil {
t.Errorf("fcntl(%s, F_GETFL) failed: %v", name, err)
} else if flags&unix.O_NONBLOCK == 0 {
t.Errorf("O_NONBLOCK not set in %s flags %#x", name, flags)
}
}
func checkCloseonexec(t *testing.T, fd int, name string) {
t.Helper()
flags, err := unix.FcntlInt(uintptr(fd), unix.F_GETFD, 0)
if err != nil {
t.Errorf("fcntl(%s, F_GETFD) failed: %v", name, err)
} else if flags&unix.FD_CLOEXEC == 0 {
t.Errorf("FD_CLOEXEC not set in %s flags %#x", name, flags)
}
}
func TestNonblockingPipe2(t *testing.T) {
var pipes [2]int
err := unix.Pipe2(pipes[:], unix.O_NONBLOCK|unix.O_CLOEXEC)
if err != nil {
t.Fatalf("pipe2: %v", err)
}
r := pipes[0]
w := pipes[1]
defer func() {
unix.Close(r)
unix.Close(w)
}()
checkNonblocking(t, r, "reader")
checkCloseonexec(t, r, "reader")
checkNonblocking(t, w, "writer")
checkCloseonexec(t, w, "writer")
}