5 files changed, 91 insertions, 0 deletions
diff --git a/src/cmd/internal/osinfo/doc.go b/src/cmd/internal/osinfo/doc.go
new file mode 100644
index 0000000..1b5469d
--- /dev/null
+++ b/src/cmd/internal/osinfo/doc.go
@@ -0,0 +1,6 @@
+// Copyright 2022 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.
+
+// Package osinfo provides OS metadata.
+package osinfo
diff --git a/src/cmd/internal/osinfo/os_js.go b/src/cmd/internal/osinfo/os_js.go
new file mode 100644
index 0000000..882580d
--- /dev/null
+++ b/src/cmd/internal/osinfo/os_js.go
@@ -0,0 +1,21 @@
+// Copyright 2022 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 js
+
+package osinfo
+
+import (
+	"fmt"
+)
+
+// Version returns the OS version name/number.
+func Version() (string, error) {
+	// Version detection on wasm varies depending on the underlying runtime
+	// (browser, node, etc), nor is there a standard via something like
+	// WASI (see https://go.dev/issue/31105). We could attempt multiple
+	// combinations, but for now we leave this unimplemented for
+	// simplicity.
+	return "", fmt.Errorf("unimplemented")
+}
diff --git a/src/cmd/internal/osinfo/os_plan9.go b/src/cmd/internal/osinfo/os_plan9.go
new file mode 100644
index 0000000..e0225a9
--- /dev/null
+++ b/src/cmd/internal/osinfo/os_plan9.go
@@ -0,0 +1,21 @@
+// Copyright 2022 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 plan9
+
+package osinfo
+
+import (
+	"os"
+)
+
+// Version returns the OS version name/number.
+func Version() (string, error) {
+	b, err := os.ReadFile("/dev/osversion")
+	if err != nil {
+		return "", err
+	}
+
+	return string(b), nil
+}
diff --git a/src/cmd/internal/osinfo/os_unix.go b/src/cmd/internal/osinfo/os_unix.go
new file mode 100644
index 0000000..e148832
--- /dev/null
+++ b/src/cmd/internal/osinfo/os_unix.go
@@ -0,0 +1,24 @@
+// Copyright 2022 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 unix
+
+package osinfo
+
+import "golang.org/x/sys/unix"
+
+// Version returns the OS version name/number.
+func Version() (string, error) {
+	var uts unix.Utsname
+	if err := unix.Uname(&uts); err != nil {
+		return "", err
+	}
+
+	sysname := unix.ByteSliceToString(uts.Sysname[:])
+	release := unix.ByteSliceToString(uts.Release[:])
+	version := unix.ByteSliceToString(uts.Version[:])
+	machine := unix.ByteSliceToString(uts.Machine[:])
+
+	return sysname + " " + release + " " + version + " " + machine, nil
+}
diff --git a/src/cmd/internal/osinfo/os_windows.go b/src/cmd/internal/osinfo/os_windows.go
new file mode 100644
index 0000000..8ffe4f3
--- /dev/null
+++ b/src/cmd/internal/osinfo/os_windows.go
@@ -0,0 +1,19 @@
+// Copyright 2022 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 windows
+
+package osinfo
+
+import (
+	"fmt"
+
+	"golang.org/x/sys/windows"
+)
+
+// Version returns the OS version name/number.
+func Version() (string, error) {
+	major, minor, patch := windows.RtlGetNtVersionNumbers()
+	return fmt.Sprintf("%d.%d.%d", major, minor, patch), nil
+}