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os/user: note in doc that user.Current is being cached

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user.Current caches the current user after its first call, so changes to
the uid after the first call will not affect its result. As this might
be unexpected, it should be mentioned in the docs.

Fixes #27659

Change-Id: I8b3323d55441d9a79bc9534c6490884d8561889b
Reviewed-on: https://go-review.googlesource.com/136315
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
David Heuschmann 2018-09-19 17:00:09 +02:00 committed by Ian Lance Taylor
parent 36a3d4f3fe
commit eff3de0e63
1 changed files with 4 additions and 0 deletions
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4
src/os/user/lookup.go
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@ -7,6 +7,10 @@ package user
import "sync"
// Current returns the current user.
//
// The first call will cache the current user information.
// Subsequent calls will return the cached value and will not reflect
// changes to the current user.
func Current() (*User, error) {
cache.Do(func() { cache.u, cache.err = current() })
if cache.err != nil {