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Author: pavelsavara

src/libraries/System.Net.NameResolution/src/System.Net.NameResolution.csproj

@@ -100,6 +100,8 @@
   <ItemGroup Condition="'$(TargetPlatformIdentifier)' == 'wasi'">
     <Compile Include="$(CommonPath)Interop\Wasi\System.Native\Interop.GetHostName.cs"
              Link="Common\Interop\Wasi\System.Native\Interop.GetHostName.cs" />
+    <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.ErrNo.cs"
+             Link="Common\Interop\Unix\System.Native\Interop.ErrNo.cs"/>
 
     <Compile Include="System\Net\NameResolutionPal.Unix.cs" />
     <Compile Include="$(CommonPath)System\Net\InteropIPAddressExtensions.Unix.cs"

src/libraries/System.Net.NameResolution/src/System/Net/NameResolutionPal.Wasi.cs

@@ -40,8 +40,7 @@ private static SocketError GetSocketErrorForNativeError(int error)
                 case (int)Interop.Sys.GetAddrInfoErrorFlags.EAI_MEMORY:
                     throw new OutOfMemoryException();
                 case (int)Interop.Sys.GetAddrInfoErrorFlags.EAI_SYSTEM:
-                    string message = Interop.Sys.GetLastErrorInfo().GetErrorMessage();
-                    throw new PlatformNotSupportedException(message);
+                    throw new PlatformNotSupportedException("__WASI_ERRNO_* " + Interop.Sys.GetErrNo());
                 default:
                     Debug.Fail($"Unexpected error: {error}");
                     return SocketError.SocketError;

src/libraries/System.Net.NameResolution/tests/PalTests/System.Net.NameResolution.Pal.Tests.csproj

@@ -77,6 +77,8 @@
              Link="Common\Interop\Windows\WinSock\Interop.GetAddrInfoExW.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetPlatformIdentifier)' == 'unix' or '$(TargetPlatformIdentifier)' == 'wasi'">
+    <Compile Include="$(CommonPath)Interop\Unix\System.Native\Interop.ErrNo.cs"
+             Link="Common\Interop\Unix\System.Native\Interop.ErrNo.cs"/>
     <Compile Include="$(CommonPath)System\Net\SocketAddressPal.Unix.cs"
              Link="Common\System\Net\Internals\SocketAddressPal.Unix.cs" />
     <Compile Include="$(CommonPath)System\Net\InteropIPAddressExtensions.Unix.cs"

src/native/libs/System.Native/pal_networking.c

@@ -379,7 +379,6 @@ int32_t SystemNative_GetHostEntryForName(const uint8_t* address, int32_t address
     hint.ai_flags = AI_CANONNAME;
     hint.ai_family = platformFamily;
 
-    printf("getaddrinfo %s\n", address);
     int result = getaddrinfo((const char*)address, NULL, &hint, &info);
     if (result != 0)
     {