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1 // Copyright 2010 The Go Authors. All rights reserved.
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2 // Use of this source code is governed by a BSD-style
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3 // license that can be found in the LICENSE file.
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4
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5 // Windows environment variables.
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6
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7 package windows
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8
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9 import (
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10 "syscall"
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11 "unsafe"
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12 )
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13
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14 func Getenv(key string) (value string, found bool) {
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15 return syscall.Getenv(key)
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16 }
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17
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18 func Setenv(key, value string) error {
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19 return syscall.Setenv(key, value)
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20 }
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21
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22 func Clearenv() {
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23 syscall.Clearenv()
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24 }
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25
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26 func Environ() []string {
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27 return syscall.Environ()
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28 }
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29
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30 // Returns a default environment associated with the token, rather than the current
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31 // process. If inheritExisting is true, then this environment also inherits the
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32 // environment of the current process.
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33 func (token Token) Environ(inheritExisting bool) (env []string, err error) {
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34 var block *uint16
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35 err = CreateEnvironmentBlock(&block, token, inheritExisting)
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36 if err != nil {
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37 return nil, err
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38 }
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39 defer DestroyEnvironmentBlock(block)
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40 blockp := uintptr(unsafe.Pointer(block))
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41 for {
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42 entry := UTF16PtrToString((*uint16)(unsafe.Pointer(blockp)))
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43 if len(entry) == 0 {
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44 break
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45 }
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46 env = append(env, entry)
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47 blockp += 2 * (uintptr(len(entry)) + 1)
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48 }
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49 return env, nil
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50 }
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51
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52 func Unsetenv(key string) error {
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53 return syscall.Unsetenv(key)
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54 }
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