systemd sd_event_exit 3 sd_event_exit sd_event_get_exit_code Ask the event loop to exit #include <systemd/sd-event.h> int sd_event_exit sd_event *event int code int sd_event_get_exit_code sd_event *event int *code sd_event_exit() requests the event loop specified in the event event loop object to exit. The code parameter may be any integer value and is returned as-is by sd_event_loop3 after the last event loop iteration. It may also be queried using sd_event_get_exit_code(), see below. When exiting is requested the event loop will stop listening for and dispatching regular event sources. Instead it will proceed with executing only event sources registered with sd_event_add_exit3 in the order defined by their priority. After all exit event sources have been dispatched the event loop is terminated. If sd_event_exit() is invoked a second time while the event loop is still processing exit event sources, the exit code stored in the event loop object is updated, but otherwise no further operation is executed. sd_event_get_exit_code() may be used to query the exit code passed to an earlier call of sd_event_exit(). The return parameter code may be set to NULL, in order to simply check if sd_event_exit() has been called before (as sd_event_get_exit_code() fails with -ENODATA if that's not the case, see below). While the full positive and negative integer ranges may be used for the exit code, care should be taken not pick exit codes that conflict with regular exit codes returned by sd_event_loop(), if these exit codes shall be distinguishable. Note that for most event source types passing the callback pointer as NULL in the respective constructor call (i.e. in sd_event_add_time3, sd_event_add_signal3, …) has the effect of sd_event_exit() being invoked once the event source triggers, with the specified userdata pointer cast to an integer as the exit code parameter. This is useful to automatically terminate an event loop after some condition, such as a time-out or reception of SIGTERM or similar. See the documentation for the respective constructor call for details. On success, sd_event_exit() and sd_event_get_exit_code() return 0 or a positive integer. On failure, they return a negative errno-style error code. Returned errors may indicate the following problems: -EINVAL The event loop object or error code pointer are invalid. -ECHILD The event loop was created in a different process, library or module instance. -ESTALE The event loop has exited already and all exit handlers are already processed. -ENODATA Returned by sd_event_get_exit_code() in case the event loop has not been requested to exit yet. sd_event_exit() and sd_event_get_exit_code() were added in version 229. systemd1 sd-event3 sd_event_new3 sd_event_add_exit3 sd_event_add_time3 sd_event_add_signal3 sd_event_add_io3 sd_event_add_defer3 sd_event_add_inotify3