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// Copyright 2012 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
import (
"fmt"
"syscall"
"unsafe"
)
func isDomainJoined() (bool, error) {
var domain *uint16
var status uint32
err := syscall.NetGetJoinInformation(nil, &domain, &status)
if err != nil {
return false, err
}
syscall.NetApiBufferFree((*byte)(unsafe.Pointer(domain)))
return status == syscall.NetSetupDomainName, nil
}
func lookupFullNameDomain(domainAndUser string) (string, error) {
return syscall.TranslateAccountName(domainAndUser,
syscall.NameSamCompatible, syscall.NameDisplay, 50)
}
func lookupFullNameServer(servername, username string) (string, error) {
s, e := syscall.UTF16PtrFromString(servername)
if e != nil {
return "", e
}
u, e := syscall.UTF16PtrFromString(username)
if e != nil {
return "", e
}
var p *byte
e = syscall.NetUserGetInfo(s, u, 10, &p)
if e != nil {
return "", e
}
defer syscall.NetApiBufferFree(p)
i := (*syscall.UserInfo10)(unsafe.Pointer(p))
if i.FullName == nil {
return "", nil
}
name := syscall.UTF16ToString((*[1024]uint16)(unsafe.Pointer(i.FullName))[:])
return name, nil
}
func lookupFullName(domain, username, domainAndUser string) (string, error) {
joined, err := isDomainJoined()
if err == nil && joined {
name, err := lookupFullNameDomain(domainAndUser)
if err == nil {
return name, nil
}
}
name, err := lookupFullNameServer(domain, username)
if err == nil {
return name, nil
}
// domain worked neigher as a domain nor as a server
// could be domain server unavailable
// pretend username is fullname
return username, nil
}
func newUser(usid *syscall.SID, gid, dir string) (*User, error) {
username, domain, t, e := usid.LookupAccount("")
if e != nil {
return nil, e
}
if t != syscall.SidTypeUser {
return nil, fmt.Errorf("user: should be user account type, not %d", t)
}
domainAndUser := domain + `\` + username
uid, e := usid.String()
if e != nil {
return nil, e
}
name, e := lookupFullName(domain, username, domainAndUser)
if e != nil {
return nil, e
}
u := &User{
Uid: uid,
Gid: gid,
Username: domainAndUser,
Name: name,
HomeDir: dir,
}
return u, nil
}
func current() (*User, error) {
t, e := syscall.OpenCurrentProcessToken()
if e != nil {
return nil, e
}
defer t.Close()
u, e := t.GetTokenUser()
if e != nil {
return nil, e
}
pg, e := t.GetTokenPrimaryGroup()
if e != nil {
return nil, e
}
gid, e := pg.PrimaryGroup.String()
if e != nil {
return nil, e
}
dir, e := t.GetUserProfileDirectory()
if e != nil {
return nil, e
}
return newUser(u.User.Sid, gid, dir)
}
// BUG(brainman): Lookup and LookupId functions do not set
// Gid and HomeDir fields in the User struct returned on windows.
func newUserFromSid(usid *syscall.SID) (*User, error) {
// TODO(brainman): do not know where to get gid and dir fields
gid := "unknown"
dir := "Unknown directory"
return newUser(usid, gid, dir)
}
func lookup(username string) (*User, error) {
sid, _, t, e := syscall.LookupSID("", username)
if e != nil {
return nil, e
}
if t != syscall.SidTypeUser {
return nil, fmt.Errorf("user: should be user account type, not %d", t)
}
return newUserFromSid(sid)
}
func lookupId(uid string) (*User, error) {
sid, e := syscall.StringToSid(uid)
if e != nil {
return nil, e
}
return newUserFromSid(sid)
}
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