完善虚拟机连接

VM/novnc/snap/local/svc_wrapper.sh

@@ -0,0 +1,29 @@
+#!/bin/bash
+
+# `snapctl get services` returns a JSON array, example:
+#{
+#"n6801": {
+#   "listen": 6801,
+#   "vnc": "localhost:5901"
+#},
+#"n6802": {
+#    "listen": 6802,
+#   "vnc": "localhost:5902"
+#}
+#}
+snapctl get services | jq -c '.[]' | while read service; do # for each service the user sepcified..
+    # get the important data for the service (listen port, VNC host:port)
+    listen_port="$(echo $service | jq --raw-output '.listen')"
+    vnc_host_port="$(echo $service | jq --raw-output '.vnc')" # --raw-output removes any quotation marks from the output
+    
+    # check whether those values are valid
+    expr "$listen_port" : '^[0-9]\+$' > /dev/null
+    listen_port_valid=$?
+    if [ ! $listen_port_valid ] || [ -z "$vnc_host_port" ]; then
+        # invalid values mean the service is disabled, do nothing except for printing a message (logged in /var/log/system or systemd journal)
+        echo "novnc: not starting service ${service} with listen_port ${listen_port} and vnc_host_port ${vnc_host_port}"
+    else
+        # start (and fork with '&') the service using the specified listen port and VNC host:port
+        $SNAP/novnc_proxy --listen $listen_port --vnc $vnc_host_port &
+    fi
+done