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ca59edaa5a
The existing uintptr arithmetic is arguably valid because the environment block is not located within the Go heap (see golang/go#58625). However, unsafe.Add (added in Go 1.17) expresses the same logic with fewer conversions, and in addition avoids triggering the unsafeptr vet check. For golang/go#41205. Change-Id: Ifc509279a13fd707be570908ec779d8518b4f75b Reviewed-on: https://go-review.googlesource.com/c/sys/+/492415 Reviewed-by: Ian Lance Taylor <iant@google.com> Run-TryBot: Bryan Mills <bcmills@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Auto-Submit: Bryan Mills <bcmills@google.com>
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Windows environment variables.
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package windows
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import (
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"syscall"
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"unsafe"
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)
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func Getenv(key string) (value string, found bool) {
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return syscall.Getenv(key)
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}
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func Setenv(key, value string) error {
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return syscall.Setenv(key, value)
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}
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func Clearenv() {
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syscall.Clearenv()
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}
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func Environ() []string {
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return syscall.Environ()
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}
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// Returns a default environment associated with the token, rather than the current
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// process. If inheritExisting is true, then this environment also inherits the
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// environment of the current process.
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func (token Token) Environ(inheritExisting bool) (env []string, err error) {
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var block *uint16
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err = CreateEnvironmentBlock(&block, token, inheritExisting)
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if err != nil {
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return nil, err
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}
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defer DestroyEnvironmentBlock(block)
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blockp := unsafe.Pointer(block)
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for {
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entry := UTF16PtrToString((*uint16)(blockp))
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if len(entry) == 0 {
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break
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}
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env = append(env, entry)
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blockp = unsafe.Add(blockp, 2*(len(entry)+1))
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}
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return env, nil
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}
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func Unsetenv(key string) error {
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return syscall.Unsetenv(key)
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}
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