updater: add initial skeleton

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/version/os_linux.go b/version/os_linux.go
new file mode 100644
index 00000000..7e5c4f1c
--- /dev/null
+++ b/version/os_linux.go
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package version
+
+import (
+	"bytes"
+	"fmt"
+	"golang.org/x/sys/unix"
+)
+
+// This isn't a Linux program, yes, but having the updater package work across platforms is quite helpful for testing.
+
+func utsToStr(u [65]byte) string {
+	i := bytes.IndexByte(u[:], 0)
+	if i < 0 {
+		return string(u[:])
+	}
+	return string(u[:i])
+}
+
+func OsName() string {
+	var utsname unix.Utsname
+	if unix.Uname(&utsname) != nil {
+		return "Unix Unknown"
+	}
+	return fmt.Sprintf("%s %s %s", utsToStr(utsname.Sysname), utsToStr(utsname.Release), utsToStr(utsname.Version))
+}