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36 lines
1.1 KiB
Go
36 lines
1.1 KiB
Go
//go:build windows
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// +build windows
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package system
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import (
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"path/filepath"
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"strings"
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"github.com/pkg/errors"
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)
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// CheckSystemDriveAndRemoveDriveLetter verifies and manipulates a Windows path.
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// This is used, for example, when validating a user provided path in docker cp.
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// If a drive letter is supplied, it must be the system drive. The drive letter
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// is always removed. Also, it translates it to OS semantics (IOW / to \). We
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// need the path in this syntax so that it can ultimately be contatenated with
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// a Windows long-path which doesn't support drive-letters. Examples:
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// C: --> Fail
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// C:\ --> \
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// a --> a
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// /a --> \a
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// d:\ --> Fail
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func CheckSystemDriveAndRemoveDriveLetter(path string) (string, error) {
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if len(path) == 2 && string(path[1]) == ":" {
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return "", errors.Errorf("No relative path specified in %q", path)
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}
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if !filepath.IsAbs(path) || len(path) < 2 {
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return filepath.FromSlash(path), nil
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}
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if string(path[1]) == ":" && !strings.EqualFold(string(path[0]), "c") {
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return "", errors.New("The specified path is not on the system drive (C:)")
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}
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return filepath.FromSlash(path[2:]), nil
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}
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