Console: toggle terminal echo based on presence of interactive child processes

src/Common/src/Interop/Unix/System.Native/Interop.ConfigureTerminalForChildProcess.cs

@@ -0,0 +1,15 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Runtime.InteropServices;
+
+internal static partial class Interop
+{
+    internal static partial class Sys
+    {
+        [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_ConfigureTerminalForChildProcess")]
+        internal static extern unsafe void ConfigureTerminalForChildProcess(bool childUsesTerminal);
+    }
+}

src/Common/src/Interop/Unix/System.Native/Interop.InitializeConsole.cs → src/Common/src/Interop/Unix/System.Native/Interop.InitializeTerminalAndSignalHandling.cs

@@ -8,8 +8,8 @@ internal static partial class Interop
 {
     internal static partial class Sys
     {
-        [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_InitializeConsole", SetLastError = true)]
-        internal static extern bool InitializeConsole();
+        [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_InitializeTerminalAndSignalHandling", SetLastError = true)]
+        internal static extern bool InitializeTerminalAndSignalHandling();
 
         [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_SetKeypadXmit")]
         internal static extern void SetKeypadXmit(string terminfoString);

src/Common/src/Interop/Unix/System.Native/Interop.RegisterForSigChld.cs

@@ -11,6 +11,6 @@ internal partial class Sys
         internal delegate void SigChldCallback(bool reapAll);
 
         [DllImport(Libraries.SystemNative, EntryPoint = "SystemNative_RegisterForSigChld")]
-        internal static extern bool RegisterForSigChld(SigChldCallback handler);
+        internal static extern void RegisterForSigChld(SigChldCallback handler);
     }
 }