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Directory.Delete: prefer DirectoryNotFoundException over UnauthorizedAccess IOException. #62396

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Dec 16, 2021
Merged

Directory.Delete: prefer DirectoryNotFoundException over UnauthorizedAccess IOException. #62396

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9fdb42b
Directory.Delete: prefer DirectoryNotFoundException over Unauthorized…
tmds Dec 4, 2021
6a4ebc7
Refactor error handling.
tmds Dec 12, 2021
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70 changes: 36 additions & 34 deletions src/libraries/System.Private.CoreLib/src/System/IO/FileSystem.Unix.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -492,43 +492,45 @@ private static bool RemoveEmptyDirectory(string fullPath, bool topLevel = false,
if (Interop.Sys.RmDir(fullPath) < 0)
{
Interop.ErrorInfo errorInfo = Interop.Sys.GetLastErrorInfo();
switch (errorInfo.Error)

if (errorInfo.Error == Interop.Error.ENOTEMPTY)
{
case Interop.Error.EACCES:
case Interop.Error.EPERM:
case Interop.Error.EROFS:
case Interop.Error.EISDIR:
throw new IOException(SR.Format(SR.UnauthorizedAccess_IODenied_Path, fullPath)); // match Win32 exception
case Interop.Error.ENOENT:
// When we're recursing, don't throw for items that go missing.
if (!topLevel)
{
return true;
}
goto default;
case Interop.Error.ENOTDIR:
// When the top-level path is a symlink to a directory, delete the link.
// In other cases, throw because we expect path to be a real directory.
if (topLevel)
{
if (!DirectoryExists(fullPath))
{
throw Interop.GetExceptionForIoErrno(Interop.Error.ENOENT.Info(), fullPath, isDirectory: true);
}
if (!throwWhenNotEmpty)
{
return false;
}
}
else if (errorInfo.Error == Interop.Error.ENOENT)
{
// When we're recursing, don't throw for items that go missing.
if (!topLevel)
{
return true;
}
}
else if (DirectoryExists(fullPath, out Interop.ErrorInfo existErr))
{
// Top-level path is a symlink to a directory, delete the link.
if (topLevel && errorInfo.Error == Interop.Error.ENOTDIR)
{
DeleteFile(fullPath);
return true;
}
}
else if (existErr.Error == Interop.Error.ENOENT)
{
// Prefer throwing DirectoryNotFoundException over other exceptions.
errorInfo = existErr;
}

DeleteFile(fullPath);
return true;
}
goto default;
case Interop.Error.ENOTEMPTY:
if (!throwWhenNotEmpty)
{
return false;
}
goto default;
default:
throw Interop.GetExceptionForIoErrno(errorInfo, fullPath, isDirectory: true);
if (errorInfo.Error == Interop.Error.EACCES ||
errorInfo.Error == Interop.Error.EPERM ||
errorInfo.Error == Interop.Error.EROFS)
{
throw new IOException(SR.Format(SR.UnauthorizedAccess_IODenied_Path, fullPath));
}

throw Interop.GetExceptionForIoErrno(errorInfo, fullPath, isDirectory: true);
}

return true;
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