// Copyright 2010 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.// +build darwin dragonfly freebsd linux netbsd openbsd solaris// Unix environment variables.packageuniximport"syscall"funcGetenv(keystring)(valuestring,foundbool){returnsyscall.Getenv(key)}funcSetenv(key,valuestring)error{returnsyscall.Setenv(key,value)}funcClearenv(){syscall.Clearenv()}funcEnviron()[]string{returnsyscall.Environ()}funcUnsetenv(keystring)error{returnsyscall.Unsetenv(key)}