github.com/docker/engine@v22.0.0-20211208180946-d456264580cf+incompatible/pkg/system/path_windows.go (about) 1 package system // import "github.com/docker/docker/pkg/system" 2 3 import ( 4 "fmt" 5 "path/filepath" 6 "strings" 7 8 "golang.org/x/sys/windows" 9 ) 10 11 // GetLongPathName converts Windows short pathnames to full pathnames. 12 // For example C:\Users\ADMIN~1 --> C:\Users\Administrator. 13 // It is a no-op on non-Windows platforms 14 func GetLongPathName(path string) (string, error) { 15 // See https://groups.google.com/forum/#!topic/golang-dev/1tufzkruoTg 16 p, err := windows.UTF16FromString(path) 17 if err != nil { 18 return "", err 19 } 20 b := p // GetLongPathName says we can reuse buffer 21 n, err := windows.GetLongPathName(&p[0], &b[0], uint32(len(b))) 22 if err != nil { 23 return "", err 24 } 25 if n > uint32(len(b)) { 26 b = make([]uint16, n) 27 _, err = windows.GetLongPathName(&p[0], &b[0], uint32(len(b))) 28 if err != nil { 29 return "", err 30 } 31 } 32 return windows.UTF16ToString(b), nil 33 } 34 35 // checkSystemDriveAndRemoveDriveLetter is the Windows implementation 36 // of CheckSystemDriveAndRemoveDriveLetter 37 func checkSystemDriveAndRemoveDriveLetter(path string, driver PathVerifier) (string, error) { 38 if len(path) == 2 && string(path[1]) == ":" { 39 return "", fmt.Errorf("No relative path specified in %q", path) 40 } 41 if !driver.IsAbs(path) || len(path) < 2 { 42 return filepath.FromSlash(path), nil 43 } 44 if string(path[1]) == ":" && !strings.EqualFold(string(path[0]), "c") { 45 return "", fmt.Errorf("The specified path is not on the system drive (C:)") 46 } 47 return filepath.FromSlash(path[2:]), nil 48 }