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Source file src/os/user/lookup_stubs.go

Documentation: os/user

  // 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.
  
  // +build !cgo,!windows,!plan9 android
  
  package user
  
  import (
  	"errors"
  	"fmt"
  	"os"
  	"runtime"
  	"strconv"
  )
  
  func init() {
  	groupImplemented = false
  }
  
  func current() (*User, error) {
  	u := &User{
  		Uid:      currentUID(),
  		Gid:      currentGID(),
  		Username: os.Getenv("USER"),
  		Name:     "", // ignored
  		HomeDir:  os.Getenv("HOME"),
  	}
  	// On NaCL and Android, return a dummy user instead of failing.
  	switch runtime.GOOS {
  	case "nacl":
  		if u.Uid == "" {
  			u.Uid = "1"
  		}
  		if u.Username == "" {
  			u.Username = "nacl"
  		}
  		if u.HomeDir == "" {
  			u.HomeDir = "/"
  		}
  	case "android":
  		if u.Uid == "" {
  			u.Uid = "1"
  		}
  		if u.Username == "" {
  			u.Username = "android"
  		}
  		if u.HomeDir == "" {
  			u.HomeDir = "/sdcard"
  		}
  	}
  	// cgo isn't available, but if we found the minimum information
  	// without it, use it:
  	if u.Uid != "" && u.Username != "" && u.HomeDir != "" {
  		return u, nil
  	}
  	return u, fmt.Errorf("user: Current not implemented on %s/%s", runtime.GOOS, runtime.GOARCH)
  }
  
  func listGroups(*User) ([]string, error) {
  	if runtime.GOOS == "android" {
  		return nil, errors.New("user: GroupIds not implemented on Android")
  	}
  	return nil, errors.New("user: GroupIds requires cgo")
  }
  
  func currentUID() string {
  	if id := os.Getuid(); id >= 0 {
  		return strconv.Itoa(id)
  	}
  	// Note: Windows returns -1, but this file isn't used on
  	// Windows anyway, so this empty return path shouldn't be
  	// used.
  	return ""
  }
  
  func currentGID() string {
  	if id := os.Getgid(); id >= 0 {
  		return strconv.Itoa(id)
  	}
  	return ""
  }
  

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