pytest: dev env var LIGHTNINGD_DEV_LOG_IO turns io logging on immediately.

This is required for the next test, which has to log messages from channeld
as soon as it starts (so might be too late if it sends SIGUSR1).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

common/status.c

@@ -36,6 +36,9 @@ static void setup_logging_sighandler(void)
 
 void status_setup_sync(int fd)
 {
+#if DEVELOPER
+	logging_io = (getenv("LIGHTNINGD_DEV_LOG_IO") != NULL);
+#endif
 	assert(status_fd == -1);
 	assert(!status_conn);
 	status_fd = fd;
@@ -44,6 +47,9 @@ void status_setup_sync(int fd)
 
 void status_setup_async(struct daemon_conn *master)
 {
+#if DEVELOPER
+	logging_io = (getenv("LIGHTNINGD_DEV_LOG_IO") != NULL);
+#endif
 	assert(status_fd == -1);
 	assert(!status_conn);
 	status_conn = master;

tests/utils.py

@@ -684,7 +684,7 @@ class NodeFactory(object):
 
         return [j.result() for j in jobs]
 
-    def get_node(self, disconnect=None, options=None, may_fail=False, may_reconnect=False, random_hsm=False, feerates=(15000, 7500, 3750), start=True):
+    def get_node(self, disconnect=None, options=None, may_fail=False, may_reconnect=False, random_hsm=False, feerates=(15000, 7500, 3750), start=True, fake_bitcoin_cli=False, log_all_io=False):
         with self.lock:
             node_id = self.next_id
             self.next_id += 1
@@ -707,6 +707,10 @@ class NodeFactory(object):
             with open(daemon.disconnect_file, "w") as f:
                 f.write("\n".join(disconnect))
             daemon.opts["dev-disconnect"] = "dev_disconnect"
+        if log_all_io:
+            assert DEVELOPER
+            daemon.env["LIGHTNINGD_DEV_LOG_IO"] = "1"
+            daemon.opts["log-level"] = "io"
         if DEVELOPER:
             daemon.opts["dev-fail-on-subdaemon-fail"] = None
             daemon.env["LIGHTNINGD_DEV_MEMLEAK"] = "1"