diff options
Diffstat (limited to 'src/internal/syscall/windows/registry')
| -rw-r--r-- | src/internal/syscall/windows/registry/export_test.go | 11 | ||||
| -rw-r--r-- | src/internal/syscall/windows/registry/key.go | 168 | ||||
| -rw-r--r-- | src/internal/syscall/windows/registry/mksyscall.go | 9 | ||||
| -rw-r--r-- | src/internal/syscall/windows/registry/registry_test.go | 666 | ||||
| -rw-r--r-- | src/internal/syscall/windows/registry/syscall.go | 27 | ||||
| -rw-r--r-- | src/internal/syscall/windows/registry/value.go | 369 | ||||
| -rw-r--r-- | src/internal/syscall/windows/registry/zsyscall_windows.go | 107 |
7 files changed, 1357 insertions, 0 deletions
diff --git a/src/internal/syscall/windows/registry/export_test.go b/src/internal/syscall/windows/registry/export_test.go new file mode 100644 index 0000000..7f1ac70 --- /dev/null +++ b/src/internal/syscall/windows/registry/export_test.go @@ -0,0 +1,11 @@ +// Copyright 2015 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. + +//go:build windows + +package registry + +func (k Key) SetValue(name string, valtype uint32, data []byte) error { + return k.setValue(name, valtype, data) +} diff --git a/src/internal/syscall/windows/registry/key.go b/src/internal/syscall/windows/registry/key.go new file mode 100644 index 0000000..b95fa8d --- /dev/null +++ b/src/internal/syscall/windows/registry/key.go @@ -0,0 +1,168 @@ +// Copyright 2015 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. + +//go:build windows + +// Package registry provides access to the Windows registry. +// +// Here is a simple example, opening a registry key and reading a string value from it. +// +// k, err := registry.OpenKey(registry.LOCAL_MACHINE, `SOFTWARE\Microsoft\Windows NT\CurrentVersion`, registry.QUERY_VALUE) +// if err != nil { +// log.Fatal(err) +// } +// defer k.Close() +// +// s, _, err := k.GetStringValue("SystemRoot") +// if err != nil { +// log.Fatal(err) +// } +// fmt.Printf("Windows system root is %q\n", s) +// +// NOTE: This package is a copy of golang.org/x/sys/windows/registry +// with KeyInfo.ModTime removed to prevent dependency cycles. +package registry + +import ( + "runtime" + "syscall" +) + +const ( + // Registry key security and access rights. + // See https://learn.microsoft.com/en-us/windows/win32/sysinfo/registry-key-security-and-access-rights + // for details. + ALL_ACCESS = 0xf003f + CREATE_LINK = 0x00020 + CREATE_SUB_KEY = 0x00004 + ENUMERATE_SUB_KEYS = 0x00008 + EXECUTE = 0x20019 + NOTIFY = 0x00010 + QUERY_VALUE = 0x00001 + READ = 0x20019 + SET_VALUE = 0x00002 + WOW64_32KEY = 0x00200 + WOW64_64KEY = 0x00100 + WRITE = 0x20006 +) + +// Key is a handle to an open Windows registry key. +// Keys can be obtained by calling OpenKey; there are +// also some predefined root keys such as CURRENT_USER. +// Keys can be used directly in the Windows API. +type Key syscall.Handle + +const ( + // Windows defines some predefined root keys that are always open. + // An application can use these keys as entry points to the registry. + // Normally these keys are used in OpenKey to open new keys, + // but they can also be used anywhere a Key is required. + CLASSES_ROOT = Key(syscall.HKEY_CLASSES_ROOT) + CURRENT_USER = Key(syscall.HKEY_CURRENT_USER) + LOCAL_MACHINE = Key(syscall.HKEY_LOCAL_MACHINE) + USERS = Key(syscall.HKEY_USERS) + CURRENT_CONFIG = Key(syscall.HKEY_CURRENT_CONFIG) +) + +// Close closes open key k. +func (k Key) Close() error { + return syscall.RegCloseKey(syscall.Handle(k)) +} + +// OpenKey opens a new key with path name relative to key k. +// It accepts any open key, including CURRENT_USER and others, +// and returns the new key and an error. +// The access parameter specifies desired access rights to the +// key to be opened. +func OpenKey(k Key, path string, access uint32) (Key, error) { + p, err := syscall.UTF16PtrFromString(path) + if err != nil { + return 0, err + } + var subkey syscall.Handle + err = syscall.RegOpenKeyEx(syscall.Handle(k), p, 0, access, &subkey) + if err != nil { + return 0, err + } + return Key(subkey), nil +} + +// ReadSubKeyNames returns the names of subkeys of key k. +func (k Key) ReadSubKeyNames() ([]string, error) { + // RegEnumKeyEx must be called repeatedly and to completion. + // During this time, this goroutine cannot migrate away from + // its current thread. See #49320. + runtime.LockOSThread() + defer runtime.UnlockOSThread() + + names := make([]string, 0) + // Registry key size limit is 255 bytes and described there: + // https://learn.microsoft.com/en-us/windows/win32/sysinfo/registry-element-size-limits + buf := make([]uint16, 256) //plus extra room for terminating zero byte +loopItems: + for i := uint32(0); ; i++ { + l := uint32(len(buf)) + for { + err := syscall.RegEnumKeyEx(syscall.Handle(k), i, &buf[0], &l, nil, nil, nil, nil) + if err == nil { + break + } + if err == syscall.ERROR_MORE_DATA { + // Double buffer size and try again. + l = uint32(2 * len(buf)) + buf = make([]uint16, l) + continue + } + if err == _ERROR_NO_MORE_ITEMS { + break loopItems + } + return names, err + } + names = append(names, syscall.UTF16ToString(buf[:l])) + } + return names, nil +} + +// CreateKey creates a key named path under open key k. +// CreateKey returns the new key and a boolean flag that reports +// whether the key already existed. +// The access parameter specifies the access rights for the key +// to be created. +func CreateKey(k Key, path string, access uint32) (newk Key, openedExisting bool, err error) { + var h syscall.Handle + var d uint32 + err = regCreateKeyEx(syscall.Handle(k), syscall.StringToUTF16Ptr(path), + 0, nil, _REG_OPTION_NON_VOLATILE, access, nil, &h, &d) + if err != nil { + return 0, false, err + } + return Key(h), d == _REG_OPENED_EXISTING_KEY, nil +} + +// DeleteKey deletes the subkey path of key k and its values. +func DeleteKey(k Key, path string) error { + return regDeleteKey(syscall.Handle(k), syscall.StringToUTF16Ptr(path)) +} + +// A KeyInfo describes the statistics of a key. It is returned by Stat. +type KeyInfo struct { + SubKeyCount uint32 + MaxSubKeyLen uint32 // size of the key's subkey with the longest name, in Unicode characters, not including the terminating zero byte + ValueCount uint32 + MaxValueNameLen uint32 // size of the key's longest value name, in Unicode characters, not including the terminating zero byte + MaxValueLen uint32 // longest data component among the key's values, in bytes + lastWriteTime syscall.Filetime +} + +// Stat retrieves information about the open key k. +func (k Key) Stat() (*KeyInfo, error) { + var ki KeyInfo + err := syscall.RegQueryInfoKey(syscall.Handle(k), nil, nil, nil, + &ki.SubKeyCount, &ki.MaxSubKeyLen, nil, &ki.ValueCount, + &ki.MaxValueNameLen, &ki.MaxValueLen, nil, &ki.lastWriteTime) + if err != nil { + return nil, err + } + return &ki, nil +} diff --git a/src/internal/syscall/windows/registry/mksyscall.go b/src/internal/syscall/windows/registry/mksyscall.go new file mode 100644 index 0000000..0e0b421 --- /dev/null +++ b/src/internal/syscall/windows/registry/mksyscall.go @@ -0,0 +1,9 @@ +// Copyright 2016 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. + +//go:build generate + +package registry + +//go:generate go run ../../../../syscall/mksyscall_windows.go -output zsyscall_windows.go syscall.go diff --git a/src/internal/syscall/windows/registry/registry_test.go b/src/internal/syscall/windows/registry/registry_test.go new file mode 100644 index 0000000..afe7a5d --- /dev/null +++ b/src/internal/syscall/windows/registry/registry_test.go @@ -0,0 +1,666 @@ +// Copyright 2015 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. + +//go:build windows + +package registry_test + +import ( + "bytes" + "crypto/rand" + "os" + "syscall" + "testing" + "unsafe" + + "internal/syscall/windows/registry" +) + +func randKeyName(prefix string) string { + const numbers = "0123456789" + buf := make([]byte, 10) + rand.Read(buf) + for i, b := range buf { + buf[i] = numbers[b%byte(len(numbers))] + } + return prefix + string(buf) +} + +func TestReadSubKeyNames(t *testing.T) { + k, err := registry.OpenKey(registry.CLASSES_ROOT, "TypeLib", registry.ENUMERATE_SUB_KEYS) + if err != nil { + t.Fatal(err) + } + defer k.Close() + + names, err := k.ReadSubKeyNames() + if err != nil { + t.Fatal(err) + } + var foundStdOle bool + for _, name := range names { + // Every PC has "stdole 2.0 OLE Automation" library installed. + if name == "{00020430-0000-0000-C000-000000000046}" { + foundStdOle = true + } + } + if !foundStdOle { + t.Fatal("could not find stdole 2.0 OLE Automation") + } +} + +func TestCreateOpenDeleteKey(t *testing.T) { + k, err := registry.OpenKey(registry.CURRENT_USER, "Software", registry.QUERY_VALUE) + if err != nil { + t.Fatal(err) + } + defer k.Close() + + testKName := randKeyName("TestCreateOpenDeleteKey_") + + testK, exist, err := registry.CreateKey(k, testKName, registry.CREATE_SUB_KEY) + if err != nil { + t.Fatal(err) + } + defer testK.Close() + + if exist { + t.Fatalf("key %q already exists", testKName) + } + + testKAgain, exist, err := registry.CreateKey(k, testKName, registry.CREATE_SUB_KEY) + if err != nil { + t.Fatal(err) + } + defer testKAgain.Close() + + if !exist { + t.Fatalf("key %q should already exist", testKName) + } + + testKOpened, err := registry.OpenKey(k, testKName, registry.ENUMERATE_SUB_KEYS) + if err != nil { + t.Fatal(err) + } + defer testKOpened.Close() + + err = registry.DeleteKey(k, testKName) + if err != nil { + t.Fatal(err) + } + + testKOpenedAgain, err := registry.OpenKey(k, testKName, registry.ENUMERATE_SUB_KEYS) + if err == nil { + defer testKOpenedAgain.Close() + t.Fatalf("key %q should already been deleted", testKName) + } + if err != registry.ErrNotExist { + t.Fatalf(`unexpected error ("not exist" expected): %v`, err) + } +} + +func equalStringSlice(a, b []string) bool { + if len(a) != len(b) { + return false + } + if a == nil { + return true + } + for i := range a { + if a[i] != b[i] { + return false + } + } + return true +} + +type ValueTest struct { + Type uint32 + Name string + Value any + WillFail bool +} + +var ValueTests = []ValueTest{ + {Type: registry.SZ, Name: "String1", Value: ""}, + {Type: registry.SZ, Name: "String2", Value: "\000", WillFail: true}, + {Type: registry.SZ, Name: "String3", Value: "Hello World"}, + {Type: registry.SZ, Name: "String4", Value: "Hello World\000", WillFail: true}, + {Type: registry.EXPAND_SZ, Name: "ExpString1", Value: ""}, + {Type: registry.EXPAND_SZ, Name: "ExpString2", Value: "\000", WillFail: true}, + {Type: registry.EXPAND_SZ, Name: "ExpString3", Value: "Hello World"}, + {Type: registry.EXPAND_SZ, Name: "ExpString4", Value: "Hello\000World", WillFail: true}, + {Type: registry.EXPAND_SZ, Name: "ExpString5", Value: "%PATH%"}, + {Type: registry.EXPAND_SZ, Name: "ExpString6", Value: "%NO_SUCH_VARIABLE%"}, + {Type: registry.EXPAND_SZ, Name: "ExpString7", Value: "%PATH%;."}, + {Type: registry.BINARY, Name: "Binary1", Value: []byte{}}, + {Type: registry.BINARY, Name: "Binary2", Value: []byte{1, 2, 3}}, + {Type: registry.BINARY, Name: "Binary3", Value: []byte{3, 2, 1, 0, 1, 2, 3}}, + {Type: registry.DWORD, Name: "Dword1", Value: uint64(0)}, + {Type: registry.DWORD, Name: "Dword2", Value: uint64(1)}, + {Type: registry.DWORD, Name: "Dword3", Value: uint64(0xff)}, + {Type: registry.DWORD, Name: "Dword4", Value: uint64(0xffff)}, + {Type: registry.QWORD, Name: "Qword1", Value: uint64(0)}, + {Type: registry.QWORD, Name: "Qword2", Value: uint64(1)}, + {Type: registry.QWORD, Name: "Qword3", Value: uint64(0xff)}, + {Type: registry.QWORD, Name: "Qword4", Value: uint64(0xffff)}, + {Type: registry.QWORD, Name: "Qword5", Value: uint64(0xffffff)}, + {Type: registry.QWORD, Name: "Qword6", Value: uint64(0xffffffff)}, + {Type: registry.MULTI_SZ, Name: "MultiString1", Value: []string{"a", "b", "c"}}, + {Type: registry.MULTI_SZ, Name: "MultiString2", Value: []string{"abc", "", "cba"}}, + {Type: registry.MULTI_SZ, Name: "MultiString3", Value: []string{""}}, + {Type: registry.MULTI_SZ, Name: "MultiString4", Value: []string{"abcdef"}}, + {Type: registry.MULTI_SZ, Name: "MultiString5", Value: []string{"\000"}, WillFail: true}, + {Type: registry.MULTI_SZ, Name: "MultiString6", Value: []string{"a\000b"}, WillFail: true}, + {Type: registry.MULTI_SZ, Name: "MultiString7", Value: []string{"ab", "\000", "cd"}, WillFail: true}, + {Type: registry.MULTI_SZ, Name: "MultiString8", Value: []string{"\000", "cd"}, WillFail: true}, + {Type: registry.MULTI_SZ, Name: "MultiString9", Value: []string{"ab", "\000"}, WillFail: true}, +} + +func setValues(t *testing.T, k registry.Key) { + for _, test := range ValueTests { + var err error + switch test.Type { + case registry.SZ: + err = k.SetStringValue(test.Name, test.Value.(string)) + case registry.EXPAND_SZ: + err = k.SetExpandStringValue(test.Name, test.Value.(string)) + case registry.MULTI_SZ: + err = k.SetStringsValue(test.Name, test.Value.([]string)) + case registry.BINARY: + err = k.SetBinaryValue(test.Name, test.Value.([]byte)) + case registry.DWORD: + err = k.SetDWordValue(test.Name, uint32(test.Value.(uint64))) + case registry.QWORD: + err = k.SetQWordValue(test.Name, test.Value.(uint64)) + default: + t.Fatalf("unsupported type %d for %s value", test.Type, test.Name) + } + if test.WillFail { + if err == nil { + t.Fatalf("setting %s value %q should fail, but succeeded", test.Name, test.Value) + } + } else { + if err != nil { + t.Fatal(err) + } + } + } +} + +func enumerateValues(t *testing.T, k registry.Key) { + names, err := k.ReadValueNames() + if err != nil { + t.Error(err) + return + } + haveNames := make(map[string]bool) + for _, n := range names { + haveNames[n] = false + } + for _, test := range ValueTests { + wantFound := !test.WillFail + _, haveFound := haveNames[test.Name] + if wantFound && !haveFound { + t.Errorf("value %s is not found while enumerating", test.Name) + } + if haveFound && !wantFound { + t.Errorf("value %s is found while enumerating, but expected to fail", test.Name) + } + if haveFound { + delete(haveNames, test.Name) + } + } + for n, v := range haveNames { + t.Errorf("value %s (%v) is found while enumerating, but has not been created", n, v) + } +} + +func testErrNotExist(t *testing.T, name string, err error) { + if err == nil { + t.Errorf("%s value should not exist", name) + return + } + if err != registry.ErrNotExist { + t.Errorf("reading %s value should return 'not exist' error, but got: %s", name, err) + return + } +} + +func testErrUnexpectedType(t *testing.T, test ValueTest, gottype uint32, err error) { + if err == nil { + t.Errorf("GetXValue(%q) should not succeed", test.Name) + return + } + if err != registry.ErrUnexpectedType { + t.Errorf("reading %s value should return 'unexpected key value type' error, but got: %s", test.Name, err) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } +} + +func testGetStringValue(t *testing.T, k registry.Key, test ValueTest) { + got, gottype, err := k.GetStringValue(test.Name) + if err != nil { + t.Errorf("GetStringValue(%s) failed: %v", test.Name, err) + return + } + if got != test.Value { + t.Errorf("want %s value %q, got %q", test.Name, test.Value, got) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } + if gottype == registry.EXPAND_SZ { + _, err = registry.ExpandString(got) + if err != nil { + t.Errorf("ExpandString(%s) failed: %v", got, err) + return + } + } +} + +func testGetIntegerValue(t *testing.T, k registry.Key, test ValueTest) { + got, gottype, err := k.GetIntegerValue(test.Name) + if err != nil { + t.Errorf("GetIntegerValue(%s) failed: %v", test.Name, err) + return + } + if got != test.Value.(uint64) { + t.Errorf("want %s value %v, got %v", test.Name, test.Value, got) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } +} + +func testGetBinaryValue(t *testing.T, k registry.Key, test ValueTest) { + got, gottype, err := k.GetBinaryValue(test.Name) + if err != nil { + t.Errorf("GetBinaryValue(%s) failed: %v", test.Name, err) + return + } + if !bytes.Equal(got, test.Value.([]byte)) { + t.Errorf("want %s value %v, got %v", test.Name, test.Value, got) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } +} + +func testGetStringsValue(t *testing.T, k registry.Key, test ValueTest) { + got, gottype, err := k.GetStringsValue(test.Name) + if err != nil { + t.Errorf("GetStringsValue(%s) failed: %v", test.Name, err) + return + } + if !equalStringSlice(got, test.Value.([]string)) { + t.Errorf("want %s value %#v, got %#v", test.Name, test.Value, got) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } +} + +func testGetValue(t *testing.T, k registry.Key, test ValueTest, size int) { + if size <= 0 { + return + } + // read data with no buffer + gotsize, gottype, err := k.GetValue(test.Name, nil) + if err != nil { + t.Errorf("GetValue(%s, [%d]byte) failed: %v", test.Name, size, err) + return + } + if gotsize != size { + t.Errorf("want %s value size of %d, got %v", test.Name, size, gotsize) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } + // read data with short buffer + gotsize, gottype, err = k.GetValue(test.Name, make([]byte, size-1)) + if err == nil { + t.Errorf("GetValue(%s, [%d]byte) should fail, but succeeded", test.Name, size-1) + return + } + if err != registry.ErrShortBuffer { + t.Errorf("reading %s value should return 'short buffer' error, but got: %s", test.Name, err) + return + } + if gotsize != size { + t.Errorf("want %s value size of %d, got %v", test.Name, size, gotsize) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } + // read full data + gotsize, gottype, err = k.GetValue(test.Name, make([]byte, size)) + if err != nil { + t.Errorf("GetValue(%s, [%d]byte) failed: %v", test.Name, size, err) + return + } + if gotsize != size { + t.Errorf("want %s value size of %d, got %v", test.Name, size, gotsize) + return + } + if gottype != test.Type { + t.Errorf("want %s value type %v, got %v", test.Name, test.Type, gottype) + return + } + // check GetValue returns ErrNotExist as required + _, _, err = k.GetValue(test.Name+"_not_there", make([]byte, size)) + if err == nil { + t.Errorf("GetValue(%q) should not succeed", test.Name) + return + } + if err != registry.ErrNotExist { + t.Errorf("GetValue(%q) should return 'not exist' error, but got: %s", test.Name, err) + return + } +} + +func testValues(t *testing.T, k registry.Key) { + for _, test := range ValueTests { + switch test.Type { + case registry.SZ, registry.EXPAND_SZ: + if test.WillFail { + _, _, err := k.GetStringValue(test.Name) + testErrNotExist(t, test.Name, err) + } else { + testGetStringValue(t, k, test) + _, gottype, err := k.GetIntegerValue(test.Name) + testErrUnexpectedType(t, test, gottype, err) + // Size of utf16 string in bytes is not perfect, + // but correct for current test values. + // Size also includes terminating 0. + testGetValue(t, k, test, (len(test.Value.(string))+1)*2) + } + _, _, err := k.GetStringValue(test.Name + "_string_not_created") + testErrNotExist(t, test.Name+"_string_not_created", err) + case registry.DWORD, registry.QWORD: + testGetIntegerValue(t, k, test) + _, gottype, err := k.GetBinaryValue(test.Name) + testErrUnexpectedType(t, test, gottype, err) + _, _, err = k.GetIntegerValue(test.Name + "_int_not_created") + testErrNotExist(t, test.Name+"_int_not_created", err) + size := 8 + if test.Type == registry.DWORD { + size = 4 + } + testGetValue(t, k, test, size) + case registry.BINARY: + testGetBinaryValue(t, k, test) + _, gottype, err := k.GetStringsValue(test.Name) + testErrUnexpectedType(t, test, gottype, err) + _, _, err = k.GetBinaryValue(test.Name + "_byte_not_created") + testErrNotExist(t, test.Name+"_byte_not_created", err) + testGetValue(t, k, test, len(test.Value.([]byte))) + case registry.MULTI_SZ: + if test.WillFail { + _, _, err := k.GetStringsValue(test.Name) + testErrNotExist(t, test.Name, err) + } else { + testGetStringsValue(t, k, test) + _, gottype, err := k.GetStringValue(test.Name) + testErrUnexpectedType(t, test, gottype, err) + size := 0 + for _, s := range test.Value.([]string) { + size += len(s) + 1 // nil terminated + } + size += 1 // extra nil at the end + size *= 2 // count bytes, not uint16 + testGetValue(t, k, test, size) + } + _, _, err := k.GetStringsValue(test.Name + "_strings_not_created") + testErrNotExist(t, test.Name+"_strings_not_created", err) + default: + t.Errorf("unsupported type %d for %s value", test.Type, test.Name) + continue + } + } +} + +func testStat(t *testing.T, k registry.Key) { + subk, _, err := registry.CreateKey(k, "subkey", registry.CREATE_SUB_KEY) + if err != nil { + t.Error(err) + return + } + defer subk.Close() + + defer registry.DeleteKey(k, "subkey") + + ki, err := k.Stat() + if err != nil { + t.Error(err) + return + } + if ki.SubKeyCount != 1 { + t.Error("key must have 1 subkey") + } + if ki.MaxSubKeyLen != 6 { + t.Error("key max subkey name length must be 6") + } + if ki.ValueCount != 24 { + t.Errorf("key must have 24 values, but is %d", ki.ValueCount) + } + if ki.MaxValueNameLen != 12 { + t.Errorf("key max value name length must be 10, but is %d", ki.MaxValueNameLen) + } + if ki.MaxValueLen != 38 { + t.Errorf("key max value length must be 38, but is %d", ki.MaxValueLen) + } +} + +func deleteValues(t *testing.T, k registry.Key) { + for _, test := range ValueTests { + if test.WillFail { + continue + } + err := k.DeleteValue(test.Name) + if err != nil { + t.Error(err) + continue + } + } + names, err := k.ReadValueNames() + if err != nil { + t.Error(err) + return + } + if len(names) != 0 { + t.Errorf("some values remain after deletion: %v", names) + } +} + +func TestValues(t *testing.T) { + softwareK, err := registry.OpenKey(registry.CURRENT_USER, "Software", registry.QUERY_VALUE) + if err != nil { + t.Fatal(err) + } + defer softwareK.Close() + + testKName := randKeyName("TestValues_") + + k, exist, err := registry.CreateKey(softwareK, testKName, registry.CREATE_SUB_KEY|registry.QUERY_VALUE|registry.SET_VALUE) + if err != nil { + t.Fatal(err) + } + defer k.Close() + + if exist { + t.Fatalf("key %q already exists", testKName) + } + + defer registry.DeleteKey(softwareK, testKName) + + setValues(t, k) + + enumerateValues(t, k) + + testValues(t, k) + + testStat(t, k) + + deleteValues(t, k) +} + +func TestExpandString(t *testing.T) { + got, err := registry.ExpandString("%PATH%") + if err != nil { + t.Fatal(err) + } + want := os.Getenv("PATH") + if got != want { + t.Errorf("want %q string expanded, got %q", want, got) + } +} + +func TestInvalidValues(t *testing.T) { + softwareK, err := registry.OpenKey(registry.CURRENT_USER, "Software", registry.QUERY_VALUE) + if err != nil { + t.Fatal(err) + } + defer softwareK.Close() + + testKName := randKeyName("TestInvalidValues_") + + k, exist, err := registry.CreateKey(softwareK, testKName, registry.CREATE_SUB_KEY|registry.QUERY_VALUE|registry.SET_VALUE) + if err != nil { + t.Fatal(err) + } + defer k.Close() + + if exist { + t.Fatalf("key %q already exists", testKName) + } + + defer registry.DeleteKey(softwareK, testKName) + + var tests = []struct { + Type uint32 + Name string + Data []byte + }{ + {registry.DWORD, "Dword1", nil}, + {registry.DWORD, "Dword2", []byte{1, 2, 3}}, + {registry.QWORD, "Qword1", nil}, + {registry.QWORD, "Qword2", []byte{1, 2, 3}}, + {registry.QWORD, "Qword3", []byte{1, 2, 3, 4, 5, 6, 7}}, + {registry.MULTI_SZ, "MultiString1", nil}, + {registry.MULTI_SZ, "MultiString2", []byte{0}}, + {registry.MULTI_SZ, "MultiString3", []byte{'a', 'b', 0}}, + {registry.MULTI_SZ, "MultiString4", []byte{'a', 0, 0, 'b', 0}}, + {registry.MULTI_SZ, "MultiString5", []byte{'a', 0, 0}}, + } + + for _, test := range tests { + err := k.SetValue(test.Name, test.Type, test.Data) + if err != nil { + t.Fatalf("SetValue for %q failed: %v", test.Name, err) + } + } + + for _, test := range tests { + switch test.Type { + case registry.DWORD, registry.QWORD: + value, valType, err := k.GetIntegerValue(test.Name) + if err == nil { + t.Errorf("GetIntegerValue(%q) succeeded. Returns type=%d value=%v", test.Name, valType, value) + } + case registry.MULTI_SZ: + value, valType, err := k.GetStringsValue(test.Name) + if err == nil { + if len(value) != 0 { + t.Errorf("GetStringsValue(%q) succeeded. Returns type=%d value=%v", test.Name, valType, value) + } + } + default: + t.Errorf("unsupported type %d for %s value", test.Type, test.Name) + } + } +} + +func TestGetMUIStringValue(t *testing.T) { + var dtzi DynamicTimezoneinformation + if _, err := GetDynamicTimeZoneInformation(&dtzi); err != nil { + t.Fatal(err) + } + tzKeyName := syscall.UTF16ToString(dtzi.TimeZoneKeyName[:]) + timezoneK, err := registry.OpenKey(registry.LOCAL_MACHINE, + `SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones\`+tzKeyName, registry.READ) + if err != nil { + t.Fatal(err) + } + defer timezoneK.Close() + + type testType struct { + name string + want string + } + var tests = []testType{ + {"MUI_Std", syscall.UTF16ToString(dtzi.StandardName[:])}, + } + if dtzi.DynamicDaylightTimeDisabled == 0 { + tests = append(tests, testType{"MUI_Dlt", syscall.UTF16ToString(dtzi.DaylightName[:])}) + } + + for _, test := range tests { + got, err := timezoneK.GetMUIStringValue(test.name) + if err != nil { + t.Error("GetMUIStringValue:", err) + } + + if got != test.want { + t.Errorf("GetMUIStringValue: %s: Got %q, want %q", test.name, got, test.want) + } + } +} + +type DynamicTimezoneinformation struct { + Bias int32 + StandardName [32]uint16 + StandardDate syscall.Systemtime + StandardBias int32 + DaylightName [32]uint16 + DaylightDate syscall.Systemtime + DaylightBias int32 + TimeZoneKeyName [128]uint16 + DynamicDaylightTimeDisabled uint8 +} + +var ( + kernel32DLL = syscall.NewLazyDLL("kernel32") + + procGetDynamicTimeZoneInformation = kernel32DLL.NewProc("GetDynamicTimeZoneInformation") +) + +func GetDynamicTimeZoneInformation(dtzi *DynamicTimezoneinformation) (rc uint32, err error) { + r0, _, e1 := syscall.Syscall(procGetDynamicTimeZoneInformation.Addr(), 1, uintptr(unsafe.Pointer(dtzi)), 0, 0) + rc = uint32(r0) + if rc == 0xffffffff { + if e1 != 0 { + err = error(e1) + } else { + err = syscall.EINVAL + } + } + return +} diff --git a/src/internal/syscall/windows/registry/syscall.go b/src/internal/syscall/windows/registry/syscall.go new file mode 100644 index 0000000..8e73091 --- /dev/null +++ b/src/internal/syscall/windows/registry/syscall.go @@ -0,0 +1,27 @@ +// Copyright 2015 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. + +//go:build windows + +package registry + +import "syscall" + +const ( + _REG_OPTION_NON_VOLATILE = 0 + + _REG_CREATED_NEW_KEY = 1 + _REG_OPENED_EXISTING_KEY = 2 + + _ERROR_NO_MORE_ITEMS syscall.Errno = 259 +) + +//sys regCreateKeyEx(key syscall.Handle, subkey *uint16, reserved uint32, class *uint16, options uint32, desired uint32, sa *syscall.SecurityAttributes, result *syscall.Handle, disposition *uint32) (regerrno error) = advapi32.RegCreateKeyExW +//sys regDeleteKey(key syscall.Handle, subkey *uint16) (regerrno error) = advapi32.RegDeleteKeyW +//sys regSetValueEx(key syscall.Handle, valueName *uint16, reserved uint32, vtype uint32, buf *byte, bufsize uint32) (regerrno error) = advapi32.RegSetValueExW +//sys regEnumValue(key syscall.Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) = advapi32.RegEnumValueW +//sys regDeleteValue(key syscall.Handle, name *uint16) (regerrno error) = advapi32.RegDeleteValueW +//sys regLoadMUIString(key syscall.Handle, name *uint16, buf *uint16, buflen uint32, buflenCopied *uint32, flags uint32, dir *uint16) (regerrno error) = advapi32.RegLoadMUIStringW + +//sys expandEnvironmentStrings(src *uint16, dst *uint16, size uint32) (n uint32, err error) = kernel32.ExpandEnvironmentStringsW diff --git a/src/internal/syscall/windows/registry/value.go b/src/internal/syscall/windows/registry/value.go new file mode 100644 index 0000000..67b1144 --- /dev/null +++ b/src/internal/syscall/windows/registry/value.go @@ -0,0 +1,369 @@ +// Copyright 2015 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. + +//go:build windows + +package registry + +import ( + "errors" + "syscall" + "unicode/utf16" + "unsafe" +) + +const ( + // Registry value types. + NONE = 0 + SZ = 1 + EXPAND_SZ = 2 + BINARY = 3 + DWORD = 4 + DWORD_BIG_ENDIAN = 5 + LINK = 6 + MULTI_SZ = 7 + RESOURCE_LIST = 8 + FULL_RESOURCE_DESCRIPTOR = 9 + RESOURCE_REQUIREMENTS_LIST = 10 + QWORD = 11 +) + +var ( + // ErrShortBuffer is returned when the buffer was too short for the operation. + ErrShortBuffer = syscall.ERROR_MORE_DATA + + // ErrNotExist is returned when a registry key or value does not exist. + ErrNotExist = syscall.ERROR_FILE_NOT_FOUND + + // ErrUnexpectedType is returned by Get*Value when the value's type was unexpected. + ErrUnexpectedType = errors.New("unexpected key value type") +) + +// GetValue retrieves the type and data for the specified value associated +// with an open key k. It fills up buffer buf and returns the retrieved +// byte count n. If buf is too small to fit the stored value it returns +// ErrShortBuffer error along with the required buffer size n. +// If no buffer is provided, it returns true and actual buffer size n. +// If no buffer is provided, GetValue returns the value's type only. +// If the value does not exist, the error returned is ErrNotExist. +// +// GetValue is a low level function. If value's type is known, use the appropriate +// Get*Value function instead. +func (k Key) GetValue(name string, buf []byte) (n int, valtype uint32, err error) { + pname, err := syscall.UTF16PtrFromString(name) + if err != nil { + return 0, 0, err + } + var pbuf *byte + if len(buf) > 0 { + pbuf = (*byte)(unsafe.Pointer(&buf[0])) + } + l := uint32(len(buf)) + err = syscall.RegQueryValueEx(syscall.Handle(k), pname, nil, &valtype, pbuf, &l) + if err != nil { + return int(l), valtype, err + } + return int(l), valtype, nil +} + +func (k Key) getValue(name string, buf []byte) (date []byte, valtype uint32, err error) { + p, err := syscall.UTF16PtrFromString(name) + if err != nil { + return nil, 0, err + } + var t uint32 + n := uint32(len(buf)) + for { + err = syscall.RegQueryValueEx(syscall.Handle(k), p, nil, &t, (*byte)(unsafe.Pointer(&buf[0])), &n) + if err == nil { + return buf[:n], t, nil + } + if err != syscall.ERROR_MORE_DATA { + return nil, 0, err + } + if n <= uint32(len(buf)) { + return nil, 0, err + } + buf = make([]byte, n) + } +} + +// GetStringValue retrieves the string value for the specified +// value name associated with an open key k. It also returns the value's type. +// If value does not exist, GetStringValue returns ErrNotExist. +// If value is not SZ or EXPAND_SZ, it will return the correct value +// type and ErrUnexpectedType. +func (k Key) GetStringValue(name string) (val string, valtype uint32, err error) { + data, typ, err2 := k.getValue(name, make([]byte, 64)) + if err2 != nil { + return "", typ, err2 + } + switch typ { + case SZ, EXPAND_SZ: + default: + return "", typ, ErrUnexpectedType + } + if len(data) == 0 { + return "", typ, nil + } + u := (*[1 << 29]uint16)(unsafe.Pointer(&data[0]))[: len(data)/2 : len(data)/2] + return syscall.UTF16ToString(u), typ, nil +} + +// GetMUIStringValue retrieves the localized string value for +// the specified value name associated with an open key k. +// If the value name doesn't exist or the localized string value +// can't be resolved, GetMUIStringValue returns ErrNotExist. +func (k Key) GetMUIStringValue(name string) (string, error) { + pname, err := syscall.UTF16PtrFromString(name) + if err != nil { + return "", err + } + + buf := make([]uint16, 1024) + var buflen uint32 + var pdir *uint16 + + err = regLoadMUIString(syscall.Handle(k), pname, &buf[0], uint32(len(buf)), &buflen, 0, pdir) + if err == syscall.ERROR_FILE_NOT_FOUND { // Try fallback path + + // Try to resolve the string value using the system directory as + // a DLL search path; this assumes the string value is of the form + // @[path]\dllname,-strID but with no path given, e.g. @tzres.dll,-320. + + // This approach works with tzres.dll but may have to be revised + // in the future to allow callers to provide custom search paths. + + var s string + s, err = ExpandString("%SystemRoot%\\system32\\") + if err != nil { + return "", err + } + pdir, err = syscall.UTF16PtrFromString(s) + if err != nil { + return "", err + } + + err = regLoadMUIString(syscall.Handle(k), pname, &buf[0], uint32(len(buf)), &buflen, 0, pdir) + } + + for err == syscall.ERROR_MORE_DATA { // Grow buffer if needed + if buflen <= uint32(len(buf)) { + break // Buffer not growing, assume race; break + } + buf = make([]uint16, buflen) + err = regLoadMUIString(syscall.Handle(k), pname, &buf[0], uint32(len(buf)), &buflen, 0, pdir) + } + + if err != nil { + return "", err + } + + return syscall.UTF16ToString(buf), nil +} + +// ExpandString expands environment-variable strings and replaces +// them with the values defined for the current user. +// Use ExpandString to expand EXPAND_SZ strings. +func ExpandString(value string) (string, error) { + if value == "" { + return "", nil + } + p, err := syscall.UTF16PtrFromString(value) + if err != nil { + return "", err + } + r := make([]uint16, 100) + for { + n, err := expandEnvironmentStrings(p, &r[0], uint32(len(r))) + if err != nil { + return "", err + } + if n <= uint32(len(r)) { + return syscall.UTF16ToString(r[:n]), nil + } + r = make([]uint16, n) + } +} + +// GetStringsValue retrieves the []string value for the specified +// value name associated with an open key k. It also returns the value's type. +// If value does not exist, GetStringsValue returns ErrNotExist. +// If value is not MULTI_SZ, it will return the correct value +// type and ErrUnexpectedType. +func (k Key) GetStringsValue(name string) (val []string, valtype uint32, err error) { + data, typ, err2 := k.getValue(name, make([]byte, 64)) + if err2 != nil { + return nil, typ, err2 + } + if typ != MULTI_SZ { + return nil, typ, ErrUnexpectedType + } + if len(data) == 0 { + return nil, typ, nil + } + p := (*[1 << 29]uint16)(unsafe.Pointer(&data[0]))[: len(data)/2 : len(data)/2] + if len(p) == 0 { + return nil, typ, nil + } + if p[len(p)-1] == 0 { + p = p[:len(p)-1] // remove terminating null + } + val = make([]string, 0, 5) + from := 0 + for i, c := range p { + if c == 0 { + val = append(val, syscall.UTF16ToString(p[from:i])) + from = i + 1 + } + } + return val, typ, nil +} + +// GetIntegerValue retrieves the integer value for the specified +// value name associated with an open key k. It also returns the value's type. +// If value does not exist, GetIntegerValue returns ErrNotExist. +// If value is not DWORD or QWORD, it will return the correct value +// type and ErrUnexpectedType. +func (k Key) GetIntegerValue(name string) (val uint64, valtype uint32, err error) { + data, typ, err2 := k.getValue(name, make([]byte, 8)) + if err2 != nil { + return 0, typ, err2 + } + switch typ { + case DWORD: + if len(data) != 4 { + return 0, typ, errors.New("DWORD value is not 4 bytes long") + } + return uint64(*(*uint32)(unsafe.Pointer(&data[0]))), DWORD, nil + case QWORD: + if len(data) != 8 { + return 0, typ, errors.New("QWORD value is not 8 bytes long") + } + return *(*uint64)(unsafe.Pointer(&data[0])), QWORD, nil + default: + return 0, typ, ErrUnexpectedType + } +} + +// GetBinaryValue retrieves the binary value for the specified +// value name associated with an open key k. It also returns the value's type. +// If value does not exist, GetBinaryValue returns ErrNotExist. +// If value is not BINARY, it will return the correct value +// type and ErrUnexpectedType. +func (k Key) GetBinaryValue(name string) (val []byte, valtype uint32, err error) { + data, typ, err2 := k.getValue(name, make([]byte, 64)) + if err2 != nil { + return nil, typ, err2 + } + if typ != BINARY { + return nil, typ, ErrUnexpectedType + } + return data, typ, nil +} + +func (k Key) setValue(name string, valtype uint32, data []byte) error { + p, err := syscall.UTF16PtrFromString(name) + if err != nil { + return err + } + if len(data) == 0 { + return regSetValueEx(syscall.Handle(k), p, 0, valtype, nil, 0) + } + return regSetValueEx(syscall.Handle(k), p, 0, valtype, &data[0], uint32(len(data))) +} + +// SetDWordValue sets the data and type of a name value +// under key k to value and DWORD. +func (k Key) SetDWordValue(name string, value uint32) error { + return k.setValue(name, DWORD, (*[4]byte)(unsafe.Pointer(&value))[:]) +} + +// SetQWordValue sets the data and type of a name value +// under key k to value and QWORD. +func (k Key) SetQWordValue(name string, value uint64) error { + return k.setValue(name, QWORD, (*[8]byte)(unsafe.Pointer(&value))[:]) +} + +func (k Key) setStringValue(name string, valtype uint32, value string) error { + v, err := syscall.UTF16FromString(value) + if err != nil { + return err + } + buf := (*[1 << 29]byte)(unsafe.Pointer(&v[0]))[: len(v)*2 : len(v)*2] + return k.setValue(name, valtype, buf) +} + +// SetStringValue sets the data and type of a name value +// under key k to value and SZ. The value must not contain a zero byte. +func (k Key) SetStringValue(name, value string) error { + return k.setStringValue(name, SZ, value) +} + +// SetExpandStringValue sets the data and type of a name value +// under key k to value and EXPAND_SZ. The value must not contain a zero byte. +func (k Key) SetExpandStringValue(name, value string) error { + return k.setStringValue(name, EXPAND_SZ, value) +} + +// SetStringsValue sets the data and type of a name value +// under key k to value and MULTI_SZ. The value strings +// must not contain a zero byte. +func (k Key) SetStringsValue(name string, value []string) error { + ss := "" + for _, s := range value { + for i := 0; i < len(s); i++ { + if s[i] == 0 { + return errors.New("string cannot have 0 inside") + } + } + ss += s + "\x00" + } + v := utf16.Encode([]rune(ss + "\x00")) + buf := (*[1 << 29]byte)(unsafe.Pointer(&v[0]))[: len(v)*2 : len(v)*2] + return k.setValue(name, MULTI_SZ, buf) +} + +// SetBinaryValue sets the data and type of a name value +// under key k to value and BINARY. +func (k Key) SetBinaryValue(name string, value []byte) error { + return k.setValue(name, BINARY, value) +} + +// DeleteValue removes a named value from the key k. +func (k Key) DeleteValue(name string) error { + return regDeleteValue(syscall.Handle(k), syscall.StringToUTF16Ptr(name)) +} + +// ReadValueNames returns the value names of key k. +func (k Key) ReadValueNames() ([]string, error) { + ki, err := k.Stat() + if err != nil { + return nil, err + } + names := make([]string, 0, ki.ValueCount) + buf := make([]uint16, ki.MaxValueNameLen+1) // extra room for terminating null character +loopItems: + for i := uint32(0); ; i++ { + l := uint32(len(buf)) + for { + err := regEnumValue(syscall.Handle(k), i, &buf[0], &l, nil, nil, nil, nil) + if err == nil { + break + } + if err == syscall.ERROR_MORE_DATA { + // Double buffer size and try again. + l = uint32(2 * len(buf)) + buf = make([]uint16, l) + continue + } + if err == _ERROR_NO_MORE_ITEMS { + break loopItems + } + return names, err + } + names = append(names, syscall.UTF16ToString(buf[:l])) + } + return names, nil +} diff --git a/src/internal/syscall/windows/registry/zsyscall_windows.go b/src/internal/syscall/windows/registry/zsyscall_windows.go new file mode 100644 index 0000000..cab1319 --- /dev/null +++ b/src/internal/syscall/windows/registry/zsyscall_windows.go @@ -0,0 +1,107 @@ +// Code generated by 'go generate'; DO NOT EDIT. + +package registry + +import ( + "internal/syscall/windows/sysdll" + "syscall" + "unsafe" +) + +var _ unsafe.Pointer + +// Do the interface allocations only once for common +// Errno values. +const ( + errnoERROR_IO_PENDING = 997 +) + +var ( + errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING) + errERROR_EINVAL error = syscall.EINVAL +) + +// errnoErr returns common boxed Errno values, to prevent +// allocations at runtime. +func errnoErr(e syscall.Errno) error { + switch e { + case 0: + return errERROR_EINVAL + case errnoERROR_IO_PENDING: + return errERROR_IO_PENDING + } + // TODO: add more here, after collecting data on the common + // error values see on Windows. (perhaps when running + // all.bat?) + return e +} + +var ( + modadvapi32 = syscall.NewLazyDLL(sysdll.Add("advapi32.dll")) + modkernel32 = syscall.NewLazyDLL(sysdll.Add("kernel32.dll")) + + procRegCreateKeyExW = modadvapi32.NewProc("RegCreateKeyExW") + procRegDeleteKeyW = modadvapi32.NewProc("RegDeleteKeyW") + procRegDeleteValueW = modadvapi32.NewProc("RegDeleteValueW") + procRegEnumValueW = modadvapi32.NewProc("RegEnumValueW") + procRegLoadMUIStringW = modadvapi32.NewProc("RegLoadMUIStringW") + procRegSetValueExW = modadvapi32.NewProc("RegSetValueExW") + procExpandEnvironmentStringsW = modkernel32.NewProc("ExpandEnvironmentStringsW") +) + +func regCreateKeyEx(key syscall.Handle, subkey *uint16, reserved uint32, class *uint16, options uint32, desired uint32, sa *syscall.SecurityAttributes, result *syscall.Handle, disposition *uint32) (regerrno error) { + r0, _, _ := syscall.Syscall9(procRegCreateKeyExW.Addr(), 9, uintptr(key), uintptr(unsafe.Pointer(subkey)), uintptr(reserved), uintptr(unsafe.Pointer(class)), uintptr(options), uintptr(desired), uintptr(unsafe.Pointer(sa)), uintptr(unsafe.Pointer(result)), uintptr(unsafe.Pointer(disposition))) + if r0 != 0 { + regerrno = syscall.Errno(r0) + } + return +} + +func regDeleteKey(key syscall.Handle, subkey *uint16) (regerrno error) { + r0, _, _ := syscall.Syscall(procRegDeleteKeyW.Addr(), 2, uintptr(key), uintptr(unsafe.Pointer(subkey)), 0) + if r0 != 0 { + regerrno = syscall.Errno(r0) + } + return +} + +func regDeleteValue(key syscall.Handle, name *uint16) (regerrno error) { + r0, _, _ := syscall.Syscall(procRegDeleteValueW.Addr(), 2, uintptr(key), uintptr(unsafe.Pointer(name)), 0) + if r0 != 0 { + regerrno = syscall.Errno(r0) + } + return +} + +func regEnumValue(key syscall.Handle, index uint32, name *uint16, nameLen *uint32, reserved *uint32, valtype *uint32, buf *byte, buflen *uint32) (regerrno error) { + r0, _, _ := syscall.Syscall9(procRegEnumValueW.Addr(), 8, uintptr(key), uintptr(index), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(nameLen)), uintptr(unsafe.Pointer(reserved)), uintptr(unsafe.Pointer(valtype)), uintptr(unsafe.Pointer(buf)), uintptr(unsafe.Pointer(buflen)), 0) + if r0 != 0 { + regerrno = syscall.Errno(r0) + } + return +} + +func regLoadMUIString(key syscall.Handle, name *uint16, buf *uint16, buflen uint32, buflenCopied *uint32, flags uint32, dir *uint16) (regerrno error) { + r0, _, _ := syscall.Syscall9(procRegLoadMUIStringW.Addr(), 7, uintptr(key), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(buf)), uintptr(buflen), uintptr(unsafe.Pointer(buflenCopied)), uintptr(flags), uintptr(unsafe.Pointer(dir)), 0, 0) + if r0 != 0 { + regerrno = syscall.Errno(r0) + } + return +} + +func regSetValueEx(key syscall.Handle, valueName *uint16, reserved uint32, vtype uint32, buf *byte, bufsize uint32) (regerrno error) { + r0, _, _ := syscall.Syscall6(procRegSetValueExW.Addr(), 6, uintptr(key), uintptr(unsafe.Pointer(valueName)), uintptr(reserved), uintptr(vtype), uintptr(unsafe.Pointer(buf)), uintptr(bufsize)) + if r0 != 0 { + regerrno = syscall.Errno(r0) + } + return +} + +func expandEnvironmentStrings(src *uint16, dst *uint16, size uint32) (n uint32, err error) { + r0, _, e1 := syscall.Syscall(procExpandEnvironmentStringsW.Addr(), 3, uintptr(unsafe.Pointer(src)), uintptr(unsafe.Pointer(dst)), uintptr(size)) + n = uint32(r0) + if n == 0 { + err = errnoErr(e1) + } + return +} |