sd_event_get_exit_code(3) — Linux manual page


SD_EVENT_EXIT(3)                sd_event_exit               SD_EVENT_EXIT(3)

NAME         top

       sd_event_exit, sd_event_get_exit_code - Ask the event loop to exit

SYNOPSIS         top

       #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         top

       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

       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

       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.

RETURN VALUE         top

       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:

           The event loop object or error code pointer are invalid.

           The event loop was created in a different process.

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

           The event loop has not been requested to exit yet.

NOTES         top

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

SEE ALSO         top

       systemd(1), sd-event(3), sd_event_new(3), sd_event_add_exit(3)

COLOPHON         top

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systemd 246                                                 SD_EVENT_EXIT(3)

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