fix zenserver state macos (#669)

- Shared memory for zenserver state may hang around after all zenserver processes exit - make sure we find a valid entry in `zen up` before bailing
- Httpasio add retry for desired port
- Httpasio only call listen() once
- Httpasio explicitly close acceptor sockets

1 files changed, 5 insertions, 1 deletions

diff --git a/src/zenutil/zenserverprocess.cpp b/src/zenutil/zenserverprocess.cpp
index 909692fbc..0b0127f93 100644
--- a/src/zenutil/zenserverprocess.cpp
+++ b/src/zenutil/zenserverprocess.cpp
@@ -177,6 +177,7 @@ ZenServerState::Initialize()
 	void* pBuf = mmap(nullptr, MapSize, PROT_READ | PROT_WRITE, MAP_SHARED, Fd, 0);
 	if (pBuf == MAP_FAILED)
 	{
+		close(Fd);
 		ThrowLastError("Could not map view of Zen server state");
 	}
 #endif
@@ -241,7 +242,10 @@ ZenServerState::Lookup(int DesiredListenPort)
 	{
 		if (m_Data[i].DesiredListenPort == DesiredListenPort)
 		{
-			return &m_Data[i];
+			if (IsProcessRunning(m_Data[i].Pid))
+			{
+				return &m_Data[i];
+			}
 		}
 	}