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- // Copyright 2018 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.
- // Test use of raw connections.
- //go:build !plan9 && !js
- package os_test
- import (
- "os"
- "syscall"
- "testing"
- )
- func TestRawConnReadWrite(t *testing.T) {
- t.Parallel()
- r, w, err := os.Pipe()
- if err != nil {
- t.Fatal(err)
- }
- defer r.Close()
- defer w.Close()
- rconn, err := r.SyscallConn()
- if err != nil {
- t.Fatal(err)
- }
- wconn, err := w.SyscallConn()
- if err != nil {
- t.Fatal(err)
- }
- var operr error
- err = wconn.Write(func(s uintptr) bool {
- _, operr = syscall.Write(syscallDescriptor(s), []byte{'b'})
- return operr != syscall.EAGAIN
- })
- if err != nil {
- t.Fatal(err)
- }
- if operr != nil {
- t.Fatal(err)
- }
- var n int
- buf := make([]byte, 1)
- err = rconn.Read(func(s uintptr) bool {
- n, operr = syscall.Read(syscallDescriptor(s), buf)
- return operr != syscall.EAGAIN
- })
- if err != nil {
- t.Fatal(err)
- }
- if operr != nil {
- t.Fatal(operr)
- }
- if n != 1 {
- t.Errorf("read %d bytes, expected 1", n)
- }
- if buf[0] != 'b' {
- t.Errorf("read %q, expected %q", buf, "b")
- }
- }
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