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 userImplemented = false 19 groupImplemented = false 20 } 21 22 func current() (*User, error) { 23 u := &User{ 24 Uid: currentUID(), 25 Gid: currentGID(), 26 Username: os.Getenv("USER"), 27 Name: "", // ignored 28 HomeDir: os.Getenv("HOME"), 29 } 30 if runtime.GOOS == "nacl" { 31 if u.Uid == "" { 32 u.Uid = "1" 33 } 34 if u.Username == "" { 35 u.Username = "nacl" 36 } 37 if u.HomeDir == "" { 38 u.HomeDir = "/home/nacl" 39 } 40 } 41 // cgo isn't available, but if we found the minimum information 42 // without it, use it: 43 if u.Uid != "" && u.Username != "" && u.HomeDir != "" { 44 return u, nil 45 } 46 return u, fmt.Errorf("user: Current not implemented on %s/%s", runtime.GOOS, runtime.GOARCH) 47 } 48 49 func lookupUser(username string) (*User, error) { 50 return nil, errors.New("user: Lookup requires cgo") 51 } 52 53 func lookupUserId(uid string) (*User, error) { 54 return nil, errors.New("user: LookupId requires cgo") 55 } 56 57 func lookupGroup(groupname string) (*Group, error) { 58 return nil, errors.New("user: LookupGroup requires cgo") 59 } 60 61 func lookupGroupId(string) (*Group, error) { 62 return nil, errors.New("user: LookupGroupId requires cgo") 63 } 64 65 func listGroups(*User) ([]string, error) { 66 return nil, errors.New("user: GroupIds requires cgo") 67 } 68 69 func currentUID() string { 70 if id := os.Getuid(); id >= 0 { 71 return strconv.Itoa(id) 72 } 73 // Note: Windows returns -1, but this file isn't used on 74 // Windows anyway, so this empty return path shouldn't be 75 // used. 76 return "" 77 } 78 79 func currentGID() string { 80 if id := os.Getgid(); id >= 0 { 81 return strconv.Itoa(id) 82 } 83 return "" 84 } 85
