mirror of
https://github.com/rwinkhart/go-winio.git
synced 2026-08-28 04:46:50 -04:00
Paul "TBBle" Hampson
0966e1ad56
The _docs_ say it returns 0 for failure, non-zero for success.
This implementation is looking for <0 as HRESULT failure, and deriving
an Errno from that.
The new tests fail with GetFileSystemType as it was defined, e.g.,
```
--- FAIL: TestGetFSTypeOfValidButAbsentDrive (0.00s)
fs_windows_test.go:41: GetFileSystemType a:\ unexpectedly succeeded
```
when I definitely do not have an A:\ drive.
Signed-off-by: Paul "TBBle" Hampson <Paul.Hampson@Pobox.com>
32 lines
859 B
Go
32 lines
859 B
Go
package fs
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import (
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"errors"
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"path/filepath"
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"golang.org/x/sys/windows"
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)
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var (
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// ErrInvalidPath is returned when the location of a file path doesn't begin with a driver letter.
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ErrInvalidPath = errors.New("the path provided to GetFileSystemType must start with a drive letter")
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)
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// GetFileSystemType obtains the type of a file system through GetVolumeInformation.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa364993(v=vs.85).aspx
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func GetFileSystemType(path string) (fsType string, err error) {
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drive := filepath.VolumeName(path)
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if len(drive) != 2 {
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return "", ErrInvalidPath
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}
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var (
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buf = make([]uint16, 255)
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size = uint32(windows.MAX_PATH + 1)
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)
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drive += `\`
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err = windows.GetVolumeInformation(windows.StringToUTF16Ptr(drive), nil, 0, nil, nil, nil, &buf[0], size)
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fsType = windows.UTF16ToString(buf)
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return
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}
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