| // 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. |
| |
| // Windows environment variables. |
| |
| package windows |
| |
| import ( |
| "syscall" |
| "unicode/utf16" |
| "unsafe" |
| ) |
| |
| func Getenv(key string) (value string, found bool) { |
| return syscall.Getenv(key) |
| } |
| |
| func Setenv(key, value string) error { |
| return syscall.Setenv(key, value) |
| } |
| |
| func Clearenv() { |
| syscall.Clearenv() |
| } |
| |
| func Environ() []string { |
| return syscall.Environ() |
| } |
| |
| // Returns a default environment associated with the token, rather than the current |
| // process. If inheritExisting is true, then this environment also inherits the |
| // environment of the current process. |
| func (token Token) Environ(inheritExisting bool) (env []string, err error) { |
| var block *uint16 |
| err = CreateEnvironmentBlock(&block, token, inheritExisting) |
| if err != nil { |
| return nil, err |
| } |
| defer DestroyEnvironmentBlock(block) |
| blockp := uintptr(unsafe.Pointer(block)) |
| for { |
| entry := (*[(1 << 30) - 1]uint16)(unsafe.Pointer(blockp))[:] |
| for i, v := range entry { |
| if v == 0 { |
| entry = entry[:i] |
| break |
| } |
| } |
| if len(entry) == 0 { |
| break |
| } |
| env = append(env, string(utf16.Decode(entry))) |
| blockp += 2 * (uintptr(len(entry)) + 1) |
| } |
| return env, nil |
| } |
| |
| func Unsetenv(key string) error { |
| return syscall.Unsetenv(key) |
| } |