manager_listen_fds() instructs sd_listen_fds_with_names() to unset the environment which means that when sd_varlink_server_listen_auto() is called from manager_start_varlink_server(), when it eventually calls sd_listen_fds_with_names() it will return zero because the environment has already been unset in manager_listen_fds(). Fix the issue by not using sd_varlink_server_listen_auto() but instead keeping track of the varlink socket in manager_listen_fds() and returning it and passing it to manager_start_varlink_server().
System and Service Manager
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