Add symbolic link APIs #54253
Fix CI bug in Windows Nano where %TEMP% points to "C:\Windows\TEMP" b…
…ut the actual folder name is "C:\Windows\Temp", which prevents us from using Assert.Equal for path comparison.
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| @@ -0,0 +1,19 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| using System; | ||
| using System.Buffers; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Win32.SafeHandles; | ||
| using Xunit; | ||
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| namespace System.IO.Tests | ||
| { | ||
| public abstract partial class BaseSymbolicLinks : FileSystemTest | ||
| { | ||
| private string GetTestDirectoryActualCasing() => TestDirectory; | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,19 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| using System; | ||
| using System.Buffers; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Win32.SafeHandles; | ||
| using Xunit; | ||
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| namespace System.IO.Tests | ||
| { | ||
| public abstract partial class BaseSymbolicLinks : FileSystemTest | ||
| { | ||
| private string GetTestDirectoryActualCasing() => TestDirectory; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| // Licensed to the .NET Foundation under one or more agreements. | ||
| // The .NET Foundation licenses this file to you under the MIT license. | ||
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| using System; | ||
| using System.Buffers; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Runtime.InteropServices; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Win32.SafeHandles; | ||
| using Xunit; | ||
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| namespace System.IO.Tests | ||
| { | ||
| public abstract partial class BaseSymbolicLinks : FileSystemTest | ||
| { | ||
| private const int OPEN_EXISTING = 3; | ||
| private const int FILE_FLAG_BACKUP_SEMANTICS = 0x02000000; | ||
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| // Some Windows versions like Windows Nano Server have the %TEMP% environment variable set to "C:\TEMP" but the | ||
| // actual folder name is "C:\Temp", which prevents asserting path values using Assert.Equal due to case sensitiveness. | ||
| // So instead of using TestDirectory directly, we retrieve the real path with proper casing of the initial folder path. | ||
| private unsafe string GetTestDirectoryActualCasing() | ||
| { | ||
| try | ||
| { | ||
| using SafeFileHandle handle = Interop.Kernel32.CreateFile( | ||
| TestDirectory, | ||
| dwDesiredAccess: 0, | ||
| dwShareMode: FileShare.ReadWrite | FileShare.Delete, | ||
| dwCreationDisposition: FileMode.Open, | ||
| dwFlagsAndAttributes: | ||
| OPEN_EXISTING | | ||
| FILE_FLAG_BACKUP_SEMANTICS // Necessary to obtain a handle to a directory | ||
| ); | ||
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| if (!handle.IsInvalid) | ||
| { | ||
| const int InitialBufferSize = 4096; | ||
| char[]? buffer = ArrayPool<char>.Shared.Rent(InitialBufferSize); | ||
| uint result = GetFinalPathNameByHandle(handle, buffer); | ||
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| // Remove extended prefix | ||
| int skip = (result > 3 && buffer[0] == '\\' && buffer[3] == '\\' && (buffer[2] == '.' || buffer[2] == '?')) ? 4 : 0; | ||
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| return new string( | ||
| buffer, | ||
| skip, | ||
| (int)result - skip); | ||
| } | ||
| } | ||
| catch { } | ||
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| return TestDirectory; | ||
| } | ||
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| private unsafe uint GetFinalPathNameByHandle(SafeFileHandle handle, char[] buffer) | ||
| { | ||
| fixed (char* bufPtr = buffer) | ||
| { | ||
| return Interop.Kernel32.GetFinalPathNameByHandle(handle, bufPtr, (uint)buffer.Length, Interop.Kernel32.FILE_NAME_NORMALIZED); | ||
| } | ||
| } | ||
| } | ||
| } | ||
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