use subprocess instead

lib/safe-harbor.py

@@ -0,0 +1,27 @@
+#! /usr/bin/env python3
+# encoding: utf-8
+
+import jsmin
+import json
+import subprocess
+import sys
+
+if __name__ == "__main__":
+	if len(sys.argv) == 2:
+		cfg_path = sys.argv[1]
+	else:
+		cfg_path = "/etc/safe-harbor/config.json"
+	
+	with open(cfg_path) as f:
+		cfg = json.loads(jsmin.jsmin(f.read()))
+	
+	command = ["/usr/bin/ssh", "-o", "ServerAliveInterval 45", "-o", "ServerAliveCountMax 2", "-o", "ExitOnForwardFailure yes", "-N"]
+	
+	for m in cfg["mapping"]:
+		command.append("-R")
+		command.append("%d:localhost:%d" %(m["remote"], m["local"]))
+	
+	command.append("%s@%s" %(cfg["user"], cfg["host"]))
+	
+	# replace this process, systemd will restart us if needed
+	subprocess.run(command)