Add Directory.CreateTempSubdirectory

src/libraries/Common/src/Interop/Unix/Interop.IOErrors.cs

@@ -45,6 +45,14 @@ internal static long CheckIo(long result, string? path = null, bool isDirectory
  return result;
  }
 
+ /// <summary>
+ /// Throws an IOException using the last error info (errno).
+ /// </summary>
+ internal static void ThrowIOExceptionForLastError()
+ {
+ ThrowExceptionForIoErrno(Sys.GetLastErrorInfo(), path: null, isDirectory: false);
+ }
+
  /// <summary>
  /// Validates the result of system call that returns greater than or equal to 0 on success
  /// and less than 0 on failure, with errno set to the error code.

src/libraries/Common/src/Interop/Unix/System.Native/Interop.MkdTemp.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+ internal static partial class Sys
+ {
+ [LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_MkdTemp", SetLastError = true)]
+ internal static unsafe partial byte* MkdTemp(byte* template);
+ }
+}

src/libraries/Common/src/Interop/Unix/System.Native/Interop.MksTemps.cs

@@ -9,8 +9,8 @@ internal static partial class Interop
  internal static partial class Sys
  {
  [LibraryImport(Libraries.SystemNative, EntryPoint = "SystemNative_MksTemps", SetLastError = true)]
- internal static partial IntPtr MksTemps(
- byte[] template,
+ internal static unsafe partial IntPtr MksTemps(
+ byte* template,
  int suffixlen);
  }
 }

src/libraries/Common/src/Interop/Windows/Kernel32/Interop.CreateDirectory.cs

@@ -14,15 +14,15 @@ internal static partial class Kernel32
  /// </summary>
  [LibraryImport(Libraries.Kernel32, EntryPoint = "CreateDirectoryW", SetLastError = true, StringMarshalling = StringMarshalling.Utf16)]
  [return: MarshalAs(UnmanagedType.Bool)]
- private static partial bool CreateDirectoryPrivate(
+ private static unsafe partial bool CreateDirectoryPrivate(
  string path,
-ref SECURITY_ATTRIBUTES lpSecurityAttributes);
+ SECURITY_ATTRIBUTES* lpSecurityAttributes);
 
- internal static bool CreateDirectory(string path, ref SECURITY_ATTRIBUTES lpSecurityAttributes)
+ internal static unsafe bool CreateDirectory(string path, SECURITY_ATTRIBUTES* lpSecurityAttributes)
  {
  // We always want to add for CreateDirectory to get around the legacy 248 character limitation
  path = PathInternal.EnsureExtendedPrefix(path);
- return CreateDirectoryPrivate(path, ref lpSecurityAttributes);
+ return CreateDirectoryPrivate(path, lpSecurityAttributes);
  }
  }
 }

src/libraries/Common/src/System/IO/FileSystem.DirectoryCreation.Windows.cs

@@ -88,7 +88,7 @@ public static unsafe void CreateDirectory(string fullPath, byte[]? securityDescr
  string name = stackDir[stackDir.Count - 1];
  stackDir.RemoveAt(stackDir.Count - 1);
 
- r = Interop.Kernel32.CreateDirectory(name, ref secAttrs);
+ r = Interop.Kernel32.CreateDirectory(name, &secAttrs);
  if (!r && (firstError == 0))
  {
  int currentError = Marshal.GetLastWin32Error();

src/libraries/Common/src/System/IO/PathInternal.Unix.cs

@@ -16,6 +16,7 @@ internal static partial class PathInternal
  internal const char PathSeparator = ':';
  internal const string DirectorySeparatorCharAsString = "/";
  internal const string ParentDirectoryPrefix = @"../";
+ internal const string DirectorySeparators = DirectorySeparatorCharAsString;
 
  internal static int GetRootLength(ReadOnlySpan<char> path)
  {

src/libraries/Common/src/System/IO/PathInternal.Windows.cs

@@ -54,6 +54,7 @@ internal static partial class PathInternal
  internal const string UncNTPathPrefix = @"\??\UNC\";
  internal const string DevicePathPrefix = @"\\.\";
  internal const string ParentDirectoryPrefix = @"..\";
+ internal const string DirectorySeparators = @"\/";
 
  internal const int MaxShortPath = 260;
  internal const int MaxShortDirectoryPath = 248;

src/libraries/Common/src/System/IO/TempFileCollection.cs

@@ -24,6 +24,7 @@ class TempFileCollection : ICollection, IDisposable
  private string _basePath;
  private readonly string _tempDir;
  private readonly Hashtable _files;
+ private bool _createdTempDirectory;
 
  public TempFileCollection() : this(null, false)
  {
@@ -127,7 +128,7 @@ private void EnsureTempNameCreated()
  do
  {
  _basePath = Path.Combine(
- string.IsNullOrEmpty(TempDir) ? Path.GetTempPath() : TempDir,
+ string.IsNullOrEmpty(TempDir) ? GetTempDirectory() : TempDir,
  Path.GetFileNameWithoutExtension(Path.GetRandomFileName()));
  tempFileName = _basePath + ".tmp";
 
@@ -150,6 +151,19 @@ private void EnsureTempNameCreated()
  }
  }
 
+#if NET7_0_OR_GREATER
+ private string GetTempDirectory()
+ {
+ _createdTempDirectory = true;
+ return Directory.CreateTempSubdirectory().FullName;
+ }
+#else
+ private static string GetTempDirectory()
+ {
+ return Path.GetTempPath();
+ }
+#endif
+
  public bool KeepFiles { get; set; }
 
  private bool KeepFile(string fileName)
@@ -177,6 +191,8 @@ private static void Delete(string fileName)
 
  internal void SafeDelete()
  {
+ bool allFilesDeleted = true;
+
  if (_files != null && _files.Count > 0)
  {
  string[] fileNames = new string[_files.Count];
@@ -188,8 +204,28 @@ internal void SafeDelete()
  Delete(fileName);
  _files.Remove(fileName);
  }
+ else
+ {
+ allFilesDeleted = false;
+ }
  }
  }
+
+ // if we created a temp directory, delete it and clear the basePath, so a new directory will be created for the next request.
+ if (_createdTempDirectory && allFilesDeleted)
+ {
+ try
+ {
+ Directory.Delete(Path.GetDirectoryName(BasePath));
+ }
+ catch
+ {
+ // Ignore all exceptions
+ }
+
+ _createdTempDirectory = false;
+ _basePath = null;
+ }
  }
  }
 }

src/libraries/Microsoft.Extensions.Configuration/tests/FunctionalTests/DisposableFileSystem.cs

@@ -14,9 +14,13 @@ public class DisposableFileSystem : IDisposable
 
  public DisposableFileSystem()
  {
- RootPath = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
- CreateFolder("");
- DirectoryInfo = new DirectoryInfo(RootPath);
+#if NETCOREAPP
+ DirectoryInfo = Directory.CreateTempSubdirectory();
+#else
+ DirectoryInfo = new DirectoryInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()));
+ DirectoryInfo.Create();
+#endif
+ RootPath = DirectoryInfo.FullName;
  }
 
  public string RootPath { get; }

src/libraries/Microsoft.Extensions.FileSystemGlobbing/tests/TestUtility/DisposableFileSystem.cs

@@ -10,9 +10,13 @@ public class DisposableFileSystem : IDisposable
  {
  public DisposableFileSystem()
  {
- RootPath = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
- Directory.CreateDirectory(RootPath);
- DirectoryInfo = new DirectoryInfo(RootPath);
+#if NETCOREAPP
+ DirectoryInfo = Directory.CreateTempSubdirectory();
+#else
+ DirectoryInfo = new DirectoryInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName()));
+ DirectoryInfo.Create();
+#endif
+ RootPath = DirectoryInfo.FullName;
  }
 
  public string RootPath { get; }

src/libraries/System.CodeDom/tests/System/CodeDom/TempFileCollectionTests.cs

@@ -277,8 +277,13 @@ private static string TempDirectory()
  {
  if (s_tempDirectory == null)
  {
+#if NETCOREAPP
+ string tempDirectory = Directory.CreateTempSubdirectory().FullName;
+#else
  string tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
  Directory.CreateDirectory(tempDirectory);
+#endif
+
  s_tempDirectory = tempDirectory;
  }
  return s_tempDirectory;

src/libraries/System.ComponentModel.Composition/tests/System/ComponentModel/Composition/Hosting/DirectoryCatalogDebuggerProxyTests.cs

@@ -164,9 +164,7 @@ private DirectoryCatalog CreateDirectoryCatalog(string path, string filter)
 
  private string GetTemporaryDirectory(string location = null)
  {
- string tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
- Directory.CreateDirectory(tempDirectory);
- return tempDirectory;
+ return Directory.CreateTempSubdirectory().FullName;
  }
  }
 
@@ -193,16 +191,12 @@ public static string GetRootTemporaryDirectory()
 
  public static string GetNewTemporaryDirectory()
  {
- string tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
- Directory.CreateDirectory(tempDirectory);
- return tempDirectory;
+ return Directory.CreateTempSubdirectory().FullName;
  }
 
  public static string GetTemporaryDirectory()
  {
- string tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
- Directory.CreateDirectory(tempDirectory);
- return tempDirectory;
+ return Directory.CreateTempSubdirectory().FullName;
  }
  }
 }

src/libraries/System.IO.FileSystem/tests/Directory/CreateTempSubdirectory.cs

@@ -0,0 +1,112 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using Microsoft.DotNet.RemoteExecutor;
+using Xunit;
+
+namespace System.IO.Tests
+{
+ public class Directory_CreateTempSubdirectory : FileSystemTest
+ {
+ public static TheoryData<string> CreateTempSubdirectoryData
+ {
+ get
+ {
+ var result = new TheoryData<string>() { null, "", "myDir", "my.Dir", "H\u00EBllo" };
+ if (!OperatingSystem.IsWindows())
+ {
+ // ensure we can use backslashes on Unix since that isn't a directory separator
+ result.Add(@"my\File");
+ result.Add(@"\");
+ }
+ return result;
+ }
+ }
+
+ [Theory]
+ [MemberData(nameof(CreateTempSubdirectoryData))]
+ public void CreateTempSubdirectory(string prefix)
+ {
+ DirectoryInfo tmpDir = Directory.CreateTempSubdirectory(prefix);
+ try
+ {
+ Assert.True(tmpDir.Exists);
+ Assert.Equal(-1, tmpDir.FullName.IndexOfAny(Path.GetInvalidPathChars()));
+ Assert.Empty(Directory.GetFileSystemEntries(tmpDir.FullName));
+ Assert.Equal(Path.TrimEndingDirectorySeparator(Path.GetTempPath()), tmpDir.Parent.FullName);
+
+ if (!string.IsNullOrEmpty(prefix))
+ {
+ Assert.StartsWith(prefix, tmpDir.Name);
+ int expectedNameLength = prefix.Length + (OperatingSystem.IsWindows() ? 12 : 6);
+ Assert.Equal(expectedNameLength, tmpDir.Name.Length);
+ }
+
+ if (!OperatingSystem.IsWindows())
+ {
+ UnixFileMode userRWX = UnixFileMode.UserRead | UnixFileMode.UserWrite | UnixFileMode.UserExecute;
+ Assert.Equal(userRWX, tmpDir.UnixFileMode);
+ }
+
+ // Ensure a file can be written to the directory
+ string tempFile = Path.Combine(tmpDir.FullName, "newFile");
+ using (FileStream fs = File.Create(tempFile, bufferSize: 1024, FileOptions.DeleteOnClose))
+ {
+ Assert.Equal(0, fs.Length);
+ }
+ }
+ finally
+ {
+ tmpDir.Delete(recursive: true);
+ }
+ }
+
+ [ConditionalFact(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]
+ public void CreateTempSubdirectoryTempUnicode()
+ {
+ RemoteExecutor.Invoke(() =>
+ {
+ DirectoryInfo tempPathWithUnicode = new DirectoryInfo(Path.Combine(Path.GetTempPath(), Path.GetRandomFileName() + "\u00F6"));
+ tempPathWithUnicode.Create();
+
+ string tempEnvVar = OperatingSystem.IsWindows() ? "TMP" : "TMPDIR";
+ Environment.SetEnvironmentVariable(tempEnvVar, tempPathWithUnicode.FullName);
+
+ try
+ {
+ DirectoryInfo tmpDir = Directory.CreateTempSubdirectory();
+ Assert.True(tmpDir.Exists);
+ Assert.Equal(tempPathWithUnicode.FullName, tmpDir.Parent.FullName);
+
+ Environment.SetEnvironmentVariable(tempEnvVar, tempPathWithUnicode.Parent.FullName);
+ }
+ finally
+ {
+ tempPathWithUnicode.Delete(recursive: true);
+ }
+ }).Dispose();
+ }
+
+ public static TheoryData<string> InvalidPrefixData
+ {
+ get
+ {
+ var result = new TheoryData<string>() { "/", "myDir/", "my/Dir" };
+ if (OperatingSystem.IsWindows())
+ {
+ result.Add(@"\");
+ result.Add(@"myDir\");
+ result.Add(@"my\Dir");
+ }
+ return result;
+ }
+ }
+
+ [Theory]
+ [MemberData(nameof(InvalidPrefixData))]
+ public void CreateTempSubdirectoryThrowsWithPrefixContainingDirectorySeparator(string prefix)
+ {
+ AssertExtensions.Throws<ArgumentException>("prefix", () => Directory.CreateTempSubdirectory(prefix));
+ }
+ }
+}

src/libraries/System.IO.FileSystem/tests/System.IO.FileSystem.Tests.csproj

@@ -19,6 +19,7 @@
  <Compile Include="Base\SymbolicLinks\BaseSymbolicLinks.cs" />
  <Compile Include="Base\SymbolicLinks\BaseSymbolicLinks.FileSystem.cs" />
  <Compile Include="Base\SymbolicLinks\BaseSymbolicLinks.FileSystemInfo.cs" />
+ <Compile Include="Directory\CreateTempSubdirectory.cs" />
  <Compile Include="Directory\EnumerableTests.cs" />
  <Compile Include="Directory\SymbolicLinks.cs" />
  <Compile Include="DirectoryInfo\SymbolicLinks.cs" />

src/libraries/System.Private.CoreLib/src/Resources/Strings.resx

@@ -2710,6 +2710,9 @@
  <data name="IO_UnknownFileName" xml:space="preserve">
  <value>[Unknown]</value>
  </data>
+ <data name="IO_MaxAttemptsReached" xml:space="preserve">
+ <value>Unable to complete the operation after the maximum number of attempts.</value>
+ </data>
  <data name="Lazy_CreateValue_NoParameterlessCtorForT" xml:space="preserve">
  <value>The lazily-initialized type does not have a public, parameterless constructor.</value>
  </data>
@@ -3988,4 +3991,7 @@
  <data name="FileNotFound_AssemblyNotFound" xml:space="preserve">
  <value>Cannot load assembly '{0}'. No metadata found for this assembly.</value>
  </data>
+ <data name="Argument_DirectorySeparatorInvalid" xml:space="preserve">
+ <value>The value may not contain directory separator characters.</value>
+ </data>
 </root>

src/libraries/System.Private.CoreLib/src/System.Private.CoreLib.Shared.projitems

@@ -2093,6 +2093,9 @@
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.MkDir.cs">
  <Link>Common\Interop\Unix\System.Native\Interop.MkDir.cs</Link>
  </Compile>
+ <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.MkdTemp.cs">
+ <Link>Common\Interop\Unix\System.Native\Interop.MkdTemp.cs</Link>
+ </Compile>
  <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.MksTemps.cs">
  <Link>Common\Interop\Unix\System.Native\Interop.MksTemps.cs</Link>
  </Compile>