[wasi] mkstemp and mkdtemp not supported by libc

[radical]

Root cause WebAssembly/wasi-libc#229

Log.
System.Runtime.Serialization.Xml.ReflectionOnly.Tests, and System.Runtime.Serialization.Xml.Tests:

[22:09:22] fail: [FAIL] DataContractSerializerTests.DCS_FileStreamSurrogate
[22:09:22] info: System.IO.DirectoryNotFoundException : Could not find a part of the path '/tmp/q5vucmkj.caj_DCS_FileStreamSurrogate_4046'.
[22:09:22] info:    at Interop.ThrowExceptionForIoErrno(ErrorInfo , String , Boolean )
[22:09:22] info:    at Interop.CheckIo(Error , String , Boolean )
[22:09:22] info:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String , OpenFlags , Int32 , Func`4 )
[22:09:22] info:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , UnixFileMode , Int64& , UnixFileMode& , Func`4 )
[22:09:22] info:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 , Func`4 )
[22:09:22] info:    at System.IO.Strategies.OSFileStreamStrategy..ctor(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.Strategies.UnixFileStreamStrategy..ctor(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.Strategies.FileStreamHelpers.ChooseStrategy(FileStream , String , FileMode , FileAccess , FileShare , Int32 , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare , Int32 , FileOptions , Int64 )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare , Int32 , FileOptions )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare , Int32 , Boolean )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare )
[22:09:22] info:    at MyFileStream..ctor(String fileName)
[22:09:22] info:    at DataContractSerializerTests.DCS_FileStreamSurrogate()
[22:09:22] info:    at System.Reflection.MethodInvoker.InterpretedInvoke(Object , IntPtr* )
[22:09:22] info:    at System.Reflection.MethodInvoker.Invoke(Object , IntPtr* , BindingFlags )

Fails consistently.

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Issue Details

---

Log.
System.Runtime.Serialization.Xml.ReflectionOnly.Tests, and System.Runtime.Serialization.Xml.Tests:

[22:09:22] fail: [FAIL] DataContractSerializerTests.DCS_FileStreamSurrogate
[22:09:22] info: System.IO.DirectoryNotFoundException : Could not find a part of the path '/tmp/q5vucmkj.caj_DCS_FileStreamSurrogate_4046'.
[22:09:22] info:    at Interop.ThrowExceptionForIoErrno(ErrorInfo , String , Boolean )
[22:09:22] info:    at Interop.CheckIo(Error , String , Boolean )
[22:09:22] info:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String , OpenFlags , Int32 , Func`4 )
[22:09:22] info:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , UnixFileMode , Int64& , UnixFileMode& , Func`4 )
[22:09:22] info:    at Microsoft.Win32.SafeHandles.SafeFileHandle.Open(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 , Func`4 )
[22:09:22] info:    at System.IO.Strategies.OSFileStreamStrategy..ctor(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.Strategies.UnixFileStreamStrategy..ctor(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.Strategies.FileStreamHelpers.ChooseStrategyCore(String , FileMode , FileAccess , FileShare , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.Strategies.FileStreamHelpers.ChooseStrategy(FileStream , String , FileMode , FileAccess , FileShare , Int32 , FileOptions , Int64 , Nullable`1 )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare , Int32 , FileOptions , Int64 )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare , Int32 , FileOptions )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare , Int32 , Boolean )
[22:09:22] info:    at System.IO.FileStream..ctor(String , FileMode , FileAccess , FileShare )
[22:09:22] info:    at MyFileStream..ctor(String fileName)
[22:09:22] info:    at DataContractSerializerTests.DCS_FileStreamSurrogate()
[22:09:22] info:    at System.Reflection.MethodInvoker.InterpretedInvoke(Object , IntPtr* )
[22:09:22] info:    at System.Reflection.MethodInvoker.Invoke(Object , IntPtr* , BindingFlags )

Fails consistently.

Author:	radical
Assignees:	-
Labels:	arch-wasm, area-System.IO, test-failure, os-wasi
Milestone:	-

[radical]

mkstemp, and mkdtemp not supported