libgo/go/os/user/lookup_stubs.go

   1 // Copyright 2011 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 // +build !cgo,!windows,!plan9 android
   6
   7 package user
   8
   9 import (
  10         "errors"
  11         "fmt"
  12         "os"
  13         "runtime"
  14         "strconv"
  15 )
  16
  17 func init() {
  18         groupImplemented = false
  19 }
  20
  21 func current() (*User, error) {
  22         u := &User{
  23                 Uid:      currentUID(),
  24                 Gid:      currentGID(),
  25                 Username: os.Getenv("USER"),
  26                 Name:     "", // ignored
  27                 HomeDir:  os.Getenv("HOME"),
  28         }
  29         // On NaCL and Android, return a dummy user instead of failing.
  30         switch runtime.GOOS {
  31         case "nacl":
  32                 if u.Uid == "" {
  33                         u.Uid = "1"
  34                 }
  35                 if u.Username == "" {
  36                         u.Username = "nacl"
  37                 }
  38                 if u.HomeDir == "" {
  39                         u.HomeDir = "/"
  40                 }
  41         case "android":
  42                 if u.Uid == "" {
  43                         u.Uid = "1"
  44                 }
  45                 if u.Username == "" {
  46                         u.Username = "android"
  47                 }
  48                 if u.HomeDir == "" {
  49                         u.HomeDir = "/sdcard"
  50                 }
  51         }
  52         // cgo isn't available, but if we found the minimum information
  53         // without it, use it:
  54         if u.Uid != "" && u.Username != "" && u.HomeDir != "" {
  55                 return u, nil
  56         }
  57         return u, fmt.Errorf("user: Current not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
  58 }
  59
  60 func listGroups(*User) ([]string, error) {
  61         if runtime.GOOS == "android" {
  62                 return nil, errors.New("user: GroupIds not implemented on Android")
  63         }
  64         return nil, errors.New("user: GroupIds requires cgo")
  65 }
  66
  67 func currentUID() string {
  68         if id := os.Getuid(); id >= 0 {
  69                 return strconv.Itoa(id)
  70         }
  71         // Note: Windows returns -1, but this file isn't used on
  72         // Windows anyway, so this empty return path shouldn't be
  73         // used.
  74         return ""
  75 }
  76
  77 func currentGID() string {
  78         if id := os.Getgid(); id >= 0 {
  79                 return strconv.Itoa(id)
  80         }
  81         return ""
  82 }