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194eaa5c0f
These fields are needed to specify the exact version of Windows that an image can run on. They may be useful for other platforms in the future. This also changes image.store.Create to validate that the loaded image is supported on the current machine. This change affects Linux as well, since it now validates the architecture and OS fields. Signed-off-by: John Starks <jostarks@microsoft.com>
73 lines
1.9 KiB
Go
73 lines
1.9 KiB
Go
package system
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import (
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"syscall"
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"unsafe"
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)
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var (
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ntuserApiset = syscall.NewLazyDLL("ext-ms-win-ntuser-window-l1-1-0")
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)
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// OSVersion is a wrapper for Windows version information
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// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724439(v=vs.85).aspx
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type OSVersion struct {
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Version uint32
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MajorVersion uint8
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MinorVersion uint8
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Build uint16
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}
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// GetOSVersion gets the operating system version on Windows. Note that
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// docker.exe must be manifested to get the correct version information.
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func GetOSVersion() OSVersion {
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var err error
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osv := OSVersion{}
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osv.Version, err = syscall.GetVersion()
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if err != nil {
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// GetVersion never fails.
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panic(err)
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}
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osv.MajorVersion = uint8(osv.Version & 0xFF)
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osv.MinorVersion = uint8(osv.Version >> 8 & 0xFF)
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osv.Build = uint16(osv.Version >> 16)
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return osv
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}
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// Unmount is a platform-specific helper function to call
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// the unmount syscall. Not supported on Windows
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func Unmount(dest string) error {
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return nil
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}
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// CommandLineToArgv wraps the Windows syscall to turn a commandline into an argument array.
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func CommandLineToArgv(commandLine string) ([]string, error) {
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var argc int32
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argsPtr, err := syscall.UTF16PtrFromString(commandLine)
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if err != nil {
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return nil, err
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}
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argv, err := syscall.CommandLineToArgv(argsPtr, &argc)
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if err != nil {
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return nil, err
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}
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defer syscall.LocalFree(syscall.Handle(uintptr(unsafe.Pointer(argv))))
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newArgs := make([]string, argc)
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for i, v := range (*argv)[:argc] {
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newArgs[i] = string(syscall.UTF16ToString((*v)[:]))
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}
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return newArgs, nil
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}
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// HasWin32KSupport determines whether containers that depend on win32k can
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// run on this machine. Win32k is the driver used to implement windowing.
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func HasWin32KSupport() bool {
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// For now, check for ntuser API support on the host. In the future, a host
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// may support win32k in containers even if the host does not support ntuser
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// APIs.
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return ntuserApiset.Load() == nil
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}
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