Zack Williams | e940c7a | 2019-08-21 14:25:39 -0700 | [diff] [blame] | 1 | // Copyright 2010 The Go Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Windows environment variables. |
| 6 | |
| 7 | package windows |
| 8 | |
| 9 | import ( |
| 10 | "syscall" |
| 11 | "unicode/utf16" |
| 12 | "unsafe" |
| 13 | ) |
| 14 | |
| 15 | func Getenv(key string) (value string, found bool) { |
| 16 | return syscall.Getenv(key) |
| 17 | } |
| 18 | |
| 19 | func Setenv(key, value string) error { |
| 20 | return syscall.Setenv(key, value) |
| 21 | } |
| 22 | |
| 23 | func Clearenv() { |
| 24 | syscall.Clearenv() |
| 25 | } |
| 26 | |
| 27 | func Environ() []string { |
| 28 | return syscall.Environ() |
| 29 | } |
| 30 | |
| 31 | // Returns a default environment associated with the token, rather than the current |
| 32 | // process. If inheritExisting is true, then this environment also inherits the |
| 33 | // environment of the current process. |
| 34 | func (token Token) Environ(inheritExisting bool) (env []string, err error) { |
| 35 | var block *uint16 |
| 36 | err = CreateEnvironmentBlock(&block, token, inheritExisting) |
| 37 | if err != nil { |
| 38 | return nil, err |
| 39 | } |
| 40 | defer DestroyEnvironmentBlock(block) |
| 41 | blockp := uintptr(unsafe.Pointer(block)) |
| 42 | for { |
| 43 | entry := (*[(1 << 30) - 1]uint16)(unsafe.Pointer(blockp))[:] |
| 44 | for i, v := range entry { |
| 45 | if v == 0 { |
| 46 | entry = entry[:i] |
| 47 | break |
| 48 | } |
| 49 | } |
| 50 | if len(entry) == 0 { |
| 51 | break |
| 52 | } |
| 53 | env = append(env, string(utf16.Decode(entry))) |
| 54 | blockp += 2 * (uintptr(len(entry)) + 1) |
| 55 | } |
| 56 | return env, nil |
| 57 | } |
| 58 | |
| 59 | func Unsetenv(key string) error { |
| 60 | return syscall.Unsetenv(key) |
| 61 | } |