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unix: add Send on Linux

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Added Send function which in turn calls existing Sendto.

Fixes golang/go#47288

Change-Id: I5c928a19cc4f10961a9e6d2802e197cc3b799438
Reviewed-on: https://go-review.googlesource.com/c/sys/+/336569
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Matt Layher <mdlayher@gmail.com>
This commit is contained in:
Mark Jeffery
2021-07-22 15:03:52 +02:00
committed by Tobias Klauser
parent b9628f2c71
commit 15123e1e1f
2 changed files with 43 additions and 0 deletions
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4
unix/syscall_unix.go
View File

@@ -313,6 +313,10 @@ func Recvfrom(fd int, p []byte, flags int) (n int, from Sockaddr, err error) {
return
}
func Send(s int, buf []byte, flags int) (err error) {
return sendto(s, buf, flags, nil, 0)
}
func Sendto(fd int, p []byte, flags int, to Sockaddr) (err error) {
ptr, n, err := to.sockaddr()
if err != nil {

39
unix/syscall_unix_test.go
View File

@@ -8,6 +8,7 @@
package unix_test
import (
"bytes"
"flag"
"fmt"
"io/ioutil"
@@ -890,6 +891,44 @@ func TestUtimesNanoAt(t *testing.T) {
}
}
func TestSend(t *testing.T) {
ec := make(chan error, 2)
ts := []byte("HELLO GOPHER")
fds, err := unix.Socketpair(unix.AF_LOCAL, unix.SOCK_STREAM, 0)
if err != nil {
t.Fatalf("Socketpair: %v", err)
}
defer unix.Close(fds[0])
defer unix.Close(fds[1])
go func() {
data := make([]byte, len(ts))
_, _, err := unix.Recvfrom(fds[1], data, 0)
if err != nil {
ec <- err
}
if !bytes.Equal(ts, data) {
ec <- fmt.Errorf("data sent != data received. Received %q", data)
}
ec <- nil
}()
err = unix.Send(fds[0], ts, 0)
if err != nil {
ec <- err
}
select {
case err = <-ec:
if err != nil {
t.Fatalf("Send: %v", err)
}
case <-time.After(2 * time.Second):
t.Fatal("Send: nothing received after 2 seconds")
}
}
// mktmpfifo creates a temporary FIFO and provides a cleanup function.
func mktmpfifo(t *testing.T) (*os.File, func()) {
err := unix.Mkfifo("fifo", 0666)