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1 | 1 | package windows |
2 | 2 |
|
3 | 3 | import ( |
| 4 | + "errors" |
| 5 | + "fmt" |
| 6 | + "io" |
| 7 | + "os" |
| 8 | + "path/filepath" |
| 9 | + "strings" |
| 10 | + "syscall" |
| 11 | + "unsafe" |
| 12 | + |
4 | 13 | "github.com/sirupsen/logrus" |
| 14 | + "go.podman.io/storage/pkg/homedir" |
5 | 15 | "golang.org/x/sys/windows" |
6 | 16 | ) |
7 | 17 |
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@@ -38,3 +48,204 @@ func HasAdminRights() bool { |
38 | 48 |
|
39 | 49 | return member || token.IsElevated() |
40 | 50 | } |
| 51 | + |
| 52 | +type SHELLEXECUTEINFO struct { |
| 53 | + cbSize uint32 |
| 54 | + fMask uint32 |
| 55 | + hwnd syscall.Handle |
| 56 | + lpVerb uintptr |
| 57 | + lpFile uintptr |
| 58 | + lpParameters uintptr |
| 59 | + lpDirectory uintptr |
| 60 | + nShow int |
| 61 | + hInstApp syscall.Handle |
| 62 | + lpIDList uintptr |
| 63 | + lpClass uintptr |
| 64 | + hkeyClass syscall.Handle |
| 65 | + dwHotKey uint32 |
| 66 | + hIconOrMonitor syscall.Handle |
| 67 | + hProcess syscall.Handle |
| 68 | +} |
| 69 | + |
| 70 | +// Cleaner to refer to the official OS constant names, and consistent with syscall |
| 71 | +// Ref: https://learn.microsoft.com/en-us/windows/win32/api/shellapi/ns-shellapi-shellexecuteinfow#members |
| 72 | +const ( |
| 73 | + SEE_MASK_NOCLOSEPROCESS = 0x40 |
| 74 | + SE_ERR_ACCESSDENIED = 0x05 |
| 75 | +) |
| 76 | + |
| 77 | +type ExitCodeError struct { |
| 78 | + Code uint |
| 79 | +} |
| 80 | + |
| 81 | +func (e *ExitCodeError) Error() string { |
| 82 | + return fmt.Sprintf("process exited with code %d", e.Code) |
| 83 | +} |
| 84 | + |
| 85 | +// BuildCommandArgs builds command line arguments for re-execution, optionally adding --reexec flag |
| 86 | +// for specified commands (init, rm) |
| 87 | +func BuildCommandArgs(elevate bool) string { |
| 88 | + var args []string |
| 89 | + for _, arg := range os.Args[1:] { |
| 90 | + if arg != "--reexec" { |
| 91 | + args = append(args, syscall.EscapeArg(arg)) |
| 92 | + if elevate && (arg == "init" || arg == "rm") { |
| 93 | + args = append(args, "--reexec") |
| 94 | + } |
| 95 | + } |
| 96 | + } |
| 97 | + return strings.Join(args, " ") |
| 98 | +} |
| 99 | + |
| 100 | +// RelaunchElevatedWait launches the current executable with elevated privileges and waits for it to complete |
| 101 | +func RelaunchElevatedWait() error { |
| 102 | + e, _ := os.Executable() |
| 103 | + d, _ := os.Getwd() |
| 104 | + exe, _ := syscall.UTF16PtrFromString(e) |
| 105 | + cwd, _ := syscall.UTF16PtrFromString(d) |
| 106 | + arg, _ := syscall.UTF16PtrFromString(BuildCommandArgs(true)) |
| 107 | + verb, _ := syscall.UTF16PtrFromString("runas") |
| 108 | + |
| 109 | + shell32 := syscall.NewLazyDLL("shell32.dll") |
| 110 | + |
| 111 | + info := &SHELLEXECUTEINFO{ |
| 112 | + fMask: SEE_MASK_NOCLOSEPROCESS, |
| 113 | + hwnd: 0, |
| 114 | + lpVerb: uintptr(unsafe.Pointer(verb)), |
| 115 | + lpFile: uintptr(unsafe.Pointer(exe)), |
| 116 | + lpParameters: uintptr(unsafe.Pointer(arg)), |
| 117 | + lpDirectory: uintptr(unsafe.Pointer(cwd)), |
| 118 | + nShow: syscall.SW_SHOWNORMAL, |
| 119 | + } |
| 120 | + info.cbSize = uint32(unsafe.Sizeof(*info)) |
| 121 | + procShellExecuteEx := shell32.NewProc("ShellExecuteExW") |
| 122 | + if ret, _, _ := procShellExecuteEx.Call(uintptr(unsafe.Pointer(info))); ret == 0 { // 0 = False |
| 123 | + err := syscall.GetLastError() |
| 124 | + if info.hInstApp == SE_ERR_ACCESSDENIED { |
| 125 | + return wrapMaybe(err, "request to elevate privileges was denied") |
| 126 | + } |
| 127 | + return wrapMaybef(err, "could not launch process, ShellEX Error = %d", info.hInstApp) |
| 128 | + } |
| 129 | + |
| 130 | + handle := info.hProcess |
| 131 | + defer func() { |
| 132 | + _ = syscall.CloseHandle(handle) |
| 133 | + }() |
| 134 | + |
| 135 | + w, err := syscall.WaitForSingleObject(handle, syscall.INFINITE) |
| 136 | + switch w { |
| 137 | + case syscall.WAIT_OBJECT_0: |
| 138 | + break |
| 139 | + case syscall.WAIT_FAILED: |
| 140 | + return fmt.Errorf("could not wait for process, failed: %w", err) |
| 141 | + default: |
| 142 | + return fmt.Errorf("could not wait for process, unknown error. event: %X, err: %v", w, err) |
| 143 | + } |
| 144 | + var code uint32 |
| 145 | + if err := syscall.GetExitCodeProcess(handle, &code); err != nil { |
| 146 | + return err |
| 147 | + } |
| 148 | + if code != 0 { |
| 149 | + return &ExitCodeError{uint(code)} |
| 150 | + } |
| 151 | + |
| 152 | + return nil |
| 153 | +} |
| 154 | + |
| 155 | +// MessageBox shows a Windows message box and returns the user's choice |
| 156 | +func MessageBox(caption, title string, fail bool) int { |
| 157 | + var format uint32 |
| 158 | + if fail { |
| 159 | + format = windows.MB_ICONERROR |
| 160 | + } else { |
| 161 | + format = windows.MB_OKCANCEL | windows.MB_ICONINFORMATION |
| 162 | + } |
| 163 | + |
| 164 | + captionPtr, _ := syscall.UTF16PtrFromString(caption) |
| 165 | + titlePtr, _ := syscall.UTF16PtrFromString(title) |
| 166 | + |
| 167 | + ret, _ := windows.MessageBox(0, captionPtr, titlePtr, format) |
| 168 | + |
| 169 | + return int(ret) |
| 170 | +} |
| 171 | + |
| 172 | +func wrapMaybe(err error, message string) error { |
| 173 | + if err != nil { |
| 174 | + return fmt.Errorf("%v: %w", message, err) |
| 175 | + } |
| 176 | + |
| 177 | + return errors.New(message) |
| 178 | +} |
| 179 | + |
| 180 | +func wrapMaybef(err error, format string, args ...any) error { |
| 181 | + if err != nil { |
| 182 | + return fmt.Errorf(format+": %w", append(args, err)...) |
| 183 | + } |
| 184 | + |
| 185 | + return fmt.Errorf(format, args...) |
| 186 | +} |
| 187 | + |
| 188 | +// IsReExecuting checks if the current process was re-executed with --reexec flag |
| 189 | +func IsReExecuting() bool { |
| 190 | + for _, arg := range os.Args { |
| 191 | + if arg == "--reexec" { |
| 192 | + return true |
| 193 | + } |
| 194 | + } |
| 195 | + return false |
| 196 | +} |
| 197 | + |
| 198 | +func CreateOrTruncateElevatedOutputFile() error { |
| 199 | + name, err := getElevatedOutputFileName() |
| 200 | + if err != nil { |
| 201 | + return err |
| 202 | + } |
| 203 | + |
| 204 | + _, err = os.Create(name) |
| 205 | + return err |
| 206 | +} |
| 207 | + |
| 208 | +// getElevatedOutputFileName returns the path to the elevated output log file |
| 209 | +func getElevatedOutputFileName() (string, error) { |
| 210 | + dir, err := homedir.GetDataHome() |
| 211 | + if err != nil { |
| 212 | + return "", err |
| 213 | + } |
| 214 | + return filepath.Join(dir, "podman-elevated-output.log"), nil |
| 215 | +} |
| 216 | + |
| 217 | +func getElevatedOutputFileRead() (*os.File, error) { |
| 218 | + return getElevatedOutputFile(os.O_RDONLY) |
| 219 | +} |
| 220 | + |
| 221 | +func GetElevatedOutputFileWrite() (*os.File, error) { |
| 222 | + return getElevatedOutputFile(os.O_WRONLY | os.O_CREATE | os.O_APPEND) |
| 223 | +} |
| 224 | + |
| 225 | +func getElevatedOutputFile(mode int) (*os.File, error) { |
| 226 | + name, err := getElevatedOutputFileName() |
| 227 | + if err != nil { |
| 228 | + return nil, err |
| 229 | + } |
| 230 | + |
| 231 | + dir, err := homedir.GetDataHome() |
| 232 | + if err != nil { |
| 233 | + return nil, err |
| 234 | + } |
| 235 | + |
| 236 | + if err = os.MkdirAll(dir, 0o755); err != nil { |
| 237 | + return nil, err |
| 238 | + } |
| 239 | + |
| 240 | + return os.OpenFile(name, mode, 0o644) |
| 241 | +} |
| 242 | + |
| 243 | +func DumpOutputFile() { |
| 244 | + file, err := getElevatedOutputFileRead() |
| 245 | + if err != nil { |
| 246 | + logrus.Debug("could not find elevated child output file") |
| 247 | + return |
| 248 | + } |
| 249 | + defer file.Close() |
| 250 | + _, _ = io.Copy(os.Stdout, file) |
| 251 | +} |
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