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windows: add GetDiskFreeSpaceEx function

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ref:
https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getdiskfreespaceexw

Change-Id: If57b0777106a2253e4287818d2c5aee2d6be13d3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/200257
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Takuto Ikuta
2019-10-10 19:43:22 +00:00
committed by Jason A. Donenfeld
parent 06d7bd2c5f
commit b09406accb
3 changed files with 35 additions and 0 deletions
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windows/syscall_windows_test.go
+21
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@@ -356,3 +356,24 @@ func TestBuildSecurityDescriptor(t *testing.T) {
t.Fatalf("SD = %q; want %q", got, want)
}
}
func TestGetDiskFreeSpaceEx(t *testing.T) {
cwd, err := windows.UTF16PtrFromString(".")
if err != nil {
t.Fatalf(`failed to call UTF16PtrFromString("."): %v`, err)
}
var freeBytesAvailableToCaller, totalNumberOfBytes, totalNumberOfFreeBytes uint64
if err := windows.GetDiskFreeSpaceEx(cwd, &freeBytesAvailableToCaller, &totalNumberOfBytes, &totalNumberOfFreeBytes); err != nil {
t.Fatalf("failed to call GetDiskFreeSpaceEx: %v", err)
}
if freeBytesAvailableToCaller == 0 {
t.Errorf("freeBytesAvailableToCaller: got 0; want > 0")
}
if totalNumberOfBytes == 0 {
t.Errorf("totalNumberOfBytes: got 0; want > 0")
}
if totalNumberOfFreeBytes == 0 {
t.Errorf("totalNumberOfFreeBytes: got 0; want > 0")
}
}