SD_EVENT_EXIT(3)                 sd_event_exit                SD_EVENT_EXIT(3)

NAME
       sd_event_exit, sd_event_get_exit_code - Ask the event loop to exit

SYNOPSIS
       #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);

DESCRIPTION
       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_loop(3) 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_exit(3) 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 into
       sd_event_exit() earlier.

       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_time(3),
       sd_event_add_signal(3), ...) 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.

RETURN VALUE
       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.

   Errors
       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.

       -ESTALE
           The event loop has exited already and all exit handlers are already
           processed.

       -ENODATA
           The event loop has not been requested to exit yet.

NOTES
       These APIs are implemented as a shared library, which can be compiled
       and linked to with the libsystemd pkg-config(1) file.

SEE ALSO
       systemd(1), sd-event(3), sd_event_new(3), sd_event_add_exit(3),
       sd_event_add_time(3), sd_event_add_signal(3), sd_event_add_io(3),
       sd_event_add_defer(3), sd_event_add_inotify(3)

systemd 252                                                   SD_EVENT_EXIT(3)

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