commit f992740a1bac6cf33cbdaf3879d120c10c839eec
author Brad Fitzpatrick <bradfitz@golang.org> Mon Feb 15 20:18:12 2021 -0800
committer Brad Fitzpatrick <bradfitz@golang.org> Tue Feb 16 22:45:49 2021 +0000
tree f88619430c622d290d92297293205569cd98e228
parent f7da38b97c650ccc85f67fcd182a930a8ae07998

unix: add Xucred, GetsockoptXucred on darwin

Test adapted from CL 134535 from Tyler Julian (@APTy).

For posterity, the auto-generated parts were updated with:

    GOARCH_TARGET=amd64 go tool cgo -godefs types_darwin.go | GOOS=darwin GOARCH_TARGET=amd64 go run mkpost.go > ztypes_darwin_amd64.go
    GOARCH_TARGET=arm64 go tool cgo -godefs types_darwin.go | GOOS=darwin GOARCH_TARGET=arm64 go run mkpost.go > ztypes_darwin_arm64.go
    GOOS=darwin GOARCH=amd64 ./mkerrors.sh -m64 > zerrors_darwin_amd64.go ; gofmt -w zerrors_darwin_amd64.go
    GOOS=darwin GOARCH=arm64 ./mkerrors.sh -m64 > zerrors_darwin_arm64.go ; gofmt -w zerrors_darwin_arm64.go
    perl -i -npe 's,( cgo -godefs(?: -- -m64)? )/.+/(\S+.go),$$1$$2,' zerrors_darwin_amd64.go zerrors_darwin_arm64.go ztypes_darwin_amd64.go ztypes_darwin_arm64.go

Fixes golang/go#27613

Change-Id: Ie41b3da840cb9c8c140c57ecfb78e7abc4f70bea
Reviewed-on: https://go-review.googlesource.com/c/sys/+/292330
Trust: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>

unix/syscall_darwin_test.go

diff --git a/unix/syscall_darwin_test.go b/unix/syscall_darwin_test.go
index d9f1013..aeefd53 100644
--- a/unix/syscall_darwin_test.go
+++ b/unix/syscall_darwin_test.go
@@ -7,8 +7,10 @@
 import (
 	"bytes"
 	"io/ioutil"
+	"net"
 	"os"
 	"path"
+	"syscall"
 	"testing"
 
 	"golang.org/x/sys/unix"
@@ -217,3 +219,37 @@
 	}
 
 }
+
+func TestGetsockoptXucred(t *testing.T) {
+	fds, err := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM, 0)
+	if err != nil {
+		t.Fatalf("Socketpair: %v", err)
+	}
+	defer syscall.Close(fds[0])
+	defer syscall.Close(fds[1])
+
+	srvFile := os.NewFile(uintptr(fds[0]), "server")
+	defer srvFile.Close()
+	srv, err := net.FileConn(srvFile)
+	if err != nil {
+		t.Fatalf("FileConn: %v", err)
+	}
+	defer srv.Close()
+
+	cliFile := os.NewFile(uintptr(fds[1]), "client")
+	defer cliFile.Close()
+	cli, err := net.FileConn(cliFile)
+	if err != nil {
+		t.Fatalf("FileConn: %v", err)
+	}
+	defer cli.Close()
+
+	cred, err := unix.GetsockoptXucred(fds[1], unix.SOL_LOCAL, unix.LOCAL_PEERCRED)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("got: %+v", cred)
+	if got, want := cred.Uid, os.Getuid(); int(got) != int(want) {
+		t.Errorf("uid = %v; want %v", got, want)
+	}
+}