github.com/campoy/docker@v1.8.0-rc1/pkg/parsers/operatingsystem/operatingsystem_windows.go (about)

     1  package operatingsystem
     2  
     3  import (
     4  	"syscall"
     5  	"unsafe"
     6  )
     7  
     8  // See https://code.google.com/p/go/source/browse/src/pkg/mime/type_windows.go?r=d14520ac25bf6940785aabb71f5be453a286f58c
     9  // for a similar sample
    10  
    11  func GetOperatingSystem() (string, error) {
    12  
    13  	var h syscall.Handle
    14  
    15  	// Default return value
    16  	ret := "Unknown Operating System"
    17  
    18  	if err := syscall.RegOpenKeyEx(syscall.HKEY_LOCAL_MACHINE,
    19  		syscall.StringToUTF16Ptr(`SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\`),
    20  		0,
    21  		syscall.KEY_READ,
    22  		&h); err != nil {
    23  		return ret, err
    24  	}
    25  	defer syscall.RegCloseKey(h)
    26  
    27  	var buf [1 << 10]uint16
    28  	var typ uint32
    29  	n := uint32(len(buf) * 2) // api expects array of bytes, not uint16
    30  
    31  	if err := syscall.RegQueryValueEx(h,
    32  		syscall.StringToUTF16Ptr("ProductName"),
    33  		nil,
    34  		&typ,
    35  		(*byte)(unsafe.Pointer(&buf[0])),
    36  		&n); err != nil {
    37  		return ret, err
    38  	}
    39  	ret = syscall.UTF16ToString(buf[:])
    40  
    41  	return ret, nil
    42  }
    43  
    44  // No-op on Windows
    45  func IsContainerized() (bool, error) {
    46  	return false, nil
    47  }