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// Copyright 2011 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.
// Package user allows user account lookups by name or id.
package user
import (
var implemented = true // set to false by lookup_stubs.go's init
// User represents a user account.
// On posix systems Uid and Gid contain a decimal number
// representing uid and gid. On windows Uid and Gid
// contain security identifier (SID) in a string format.
// On Plan 9, Uid, Gid, Username, and Name will be the
// contents of /dev/user.
type User struct {
Uid string // user id
Gid string // primary group id
Username string
Name string
HomeDir string
// UnknownUserIdError is returned by LookupId when
// a user cannot be found.
type UnknownUserIdError int
func (e UnknownUserIdError) Error() string {
return "user: unknown userid " + strconv.Itoa(int(e))
// UnknownUserError is returned by Lookup when
// a user cannot be found.
type UnknownUserError string
func (e UnknownUserError) Error() string {
return "user: unknown user " + string(e)