public static unsafe SafeHandle DuplicateSocket(this Socket socket)
{
var handle = socket.SafeHandle;
var fd = -1;
try
{
fd = LibC.dup(handle.DangerousGetHandle().ToInt32());
if (fd == -1)
{
PlatformException.Throw();
}
}
finally
{
handle.DangerousRelease();
}
return(new FileDescriptorSafeHandle(fd));
}
private unsafe void Run()
{
int stackSize = 1024 * 1024;
Span <byte> stackBuf = stackalloc byte[stackSize];
fixed(byte *stack = stackBuf)
{
int childPid = clone(
(void *)Marshal.GetFunctionPointerForDelegate <execChild>(ExecChild),
(void *)(stack + stackSize), // stack grows downwards
SIGCHLD /* |CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWPID */,
null);
if (childPid < 0)
{
PlatformException.Throw();
}
// wait for child to exit
// TODO: this is somehow not working, maybe because of clone()
Process.GetProcessById(childPid).WaitForExit();
Console.WriteLine("finished waiting for {0}", childPid);
}
}