SD_EVENT_SOURCE_SET_EXsd_event_source_seSD_EVENT_SOURCE_SET_EXIT_ON_FAILURE(3)

NAME
       sd_event_source_set_exit_on_failure,
       sd_event_source_get_exit_on_failure - Set or retrieve the
       exit-on-failure feature of event sources

SYNOPSIS
       #include <systemd/sd-event.h>

       int sd_event_source_set_exit_on_failure(sd_event_source *source,
                                               int b);

       int sd_event_source_get_exit_on_failure(sd_event_source *source);

DESCRIPTION
       sd_event_source_set_exit_on_failure() may be used to set/unset the
       exit-on-failure flag of the event source object specified as source.
       The flag defaults to off. If on and the callback function set for the
       event source returns a failure code (i.e. a negative value) the event
       loop is exited too, using the callback return code as the exit code for
       sd_event_exit(3). If off, the event source is disabled but the event
       loop continues to run. Setting this flag is useful for "dominant" event
       sources that define the purpose and reason for the event loop, and
       whose failure hence should propagate to the event loop itself -- as
       opposed to "auxiliary" event sources whose failures should remain local
       and affect the event source, but not propagate further.

       sd_event_source_get_exit_on_failure() may be used to query the flag
       currently set for the event source object source.

RETURN VALUE
       On success, sd_event_source_set_exit_on_failure() returns a
       non-negative integer.  sd_event_source_get_exit_on_failure() returns 0
       if the flag is off, > 0 if the flag is on. On failure, both return a
       negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           source is not a valid pointer to an sd_event_source object.

       -EDOM
           The event source refers to an exit event source (as created with
           sd_event_add_exit(3)), for which this functionality is not
           supported.

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
       sd-event(3), sd_event_add_io(3), sd_event_add_time(3),
       sd_event_add_signal(3), sd_event_add_child(3), sd_event_add_inotify(3),
       sd_event_add_defer(3)

systemd 252                             SD_EVENT_SOURCE_SET_EXIT_ON_FAILURE(3)

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