Add 86Box launch script for MacOS

macos/bin/486

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+
+# Enable strict mode
+set -euo pipefail
+
+# Attempt to create a specific directory as a crude lock
+machine_dir=$HOME/486
+lock_dir=$machine_dir/.locked
+if ! mkdir "$lock_dir" 2> /dev/null
+then
+    echo "Lockout failed.  The machine may already be running." >&2
+    exit 1
+fi
+
+# Initialize globals used by handle-trap
+signals='INT TERM'
+
+# Usage: handle-trap [exit_code]
+#
+# Removes the lock upon script exit or signal
+#
+# Positional arguments:
+#   exit_code   Optional exit code for which to trigger a script exit
+function handle-trap
+{
+    trap - EXIT $signals
+    rm -r "$lock_dir"
+    if [[ $# -gt 0 ]]
+    then
+        exit "$1"
+    fi
+}
+
+# Set the trap
+trap handle-trap EXIT
+trap 'handle-trap 1' $signals
+
+# Change into the machine directory and start the machine
+cd "$machine_dir"
+86Box.app/Contents/MacOS/86Box