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package system // import "github.com/docker/docker/pkg/system"
import "golang.org/x/sys/windows"
// GetLongPathName converts Windows short pathnames to full pathnames.
// For example C:\Users\ADMIN~1 --> C:\Users\Administrator.
// It is a no-op on non-Windows platforms
func GetLongPathName(path string) (string, error) {
// See https://groups.google.com/forum/#!topic/golang-dev/1tufzkruoTg
p, err := windows.UTF16FromString(path)
if err != nil {
return "", err
}
b := p // GetLongPathName says we can reuse buffer
n, err := windows.GetLongPathName(&p[0], &b[0], uint32(len(b)))
if err != nil {
return "", err
}
if n > uint32(len(b)) {
b = make([]uint16, n)
_, err = windows.GetLongPathName(&p[0], &b[0], uint32(len(b)))
if err != nil {
return "", err
}
}
return windows.UTF16ToString(b), nil
}
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