commit https://github.com/vim/vim/commit/81661fb86801e6d6e5194b43dfd27d73fcc016ec Author: Bram Moolenaar <Bram@vim.org> Date: Thu Feb 18 22:23:34 2016 +0100 patch 7.4.1351 Problem: When the port isn't opened yet when ch_open() is called it may fail instead of waiting for the specified time. Solution: Loop when select() succeeds but when connect() failed. Also use channel logging for jobs. Add ch_log().

--- a/src/proto/channel.pro
+++ b/src/proto/channel.pro
@@ -1,5 +1,8 @@
 /* channel.c */
 void ch_logfile(FILE *file);
+int ch_log_active(void);
+void ch_log(channel_T *ch, char *msg);
+void ch_logs(channel_T *ch, char *msg, char *name);
 channel_T *add_channel(void);
 void channel_free(channel_T *channel);
 void channel_gui_register(channel_T *channel);