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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | COLOPHON |
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SD_EV...AILURE(3) sd_event_source_set_exit_on_failure SD_EV...AILURE(3)
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
#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);
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.
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.
Added in version 247.
-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.
Added in version 247.
Functions described here are available as a shared library, which
can be compiled against and linked to with the
libsystemd pkg-config(1) file.
The code described here uses getenv(3), which is declared to be
not multi-thread-safe. This means that the code calling the
functions described here must not call setenv(3) from a parallel
thread. It is recommended to only do calls to setenv() from an
early phase of the program when no other threads have been
started.
sd_event_source_set_exit_on_failure() and
sd_event_source_get_exit_on_failure() were added in version 247.
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)
This page is part of the systemd (systemd system and service
manager) project. Information about the project can be found at
⟨http://www.freedesktop.org/wiki/Software/systemd⟩. If you have
a bug report for this manual page, see
⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
This page was obtained from the project's upstream Git repository
⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) If you discover any rendering
problems in this HTML version of the page, or you believe there
is a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
[email protected]
systemd 257~devel SD_EV...AILURE(3)
Pages that refer to this page: sd_event_add_child(3), sd_event_add_defer(3), sd_event_add_io(3), sd_event_add_signal(3), sd_event_add_time(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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