'\" t
.TH "SD_EVENT_SET_EXIT_ON_IDLE" "3" "" "systemd 259" "sd_event_set_exit_on_idle"
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.SH "NAME"
sd_event_set_exit_on_idle, sd_event_get_exit_on_idle \- Enable event loop exit\-on\-idle support
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-event\&.h>
.fi
.ft
.HP \w'int\ sd_event_set_exit_on_idle('u
.BI "int sd_event_set_exit_on_idle(sd_event\ *" "event" ", int\ b);"
.HP \w'int\ sd_event_get_exit_on_idle('u
.BI "int sd_event_get_exit_on_idle(sd_event\ *" "event" ");"
.SH "DESCRIPTION"
.PP
\fBsd_event_set_exit_on_idle()\fR
may be used to enable or disable the exit\-on\-idle support in the event loop object specified in the
\fIevent\fR
parameter\&. If enabled, the event loop will exit with a zero exit code there are no more enabled (\fBSD_EVENT_ON\fR,
\fBSD_EVENT_ONESHOT\fR), non\-exit, non\-post event sources\&.
.PP
\fBsd_event_get_exit_on_idle()\fR
may be used to determine whether exit\-on\-idle support was previously requested by a call to
\fBsd_event_set_exit_on_idle()\fR
with a true
\fIb\fR
parameter and successfully enabled\&.
.SH "RETURN VALUE"
.PP
On success,
\fBsd_event_set_exit_on_idle()\fR
and
\fBsd_event_get_exit_on_idle()\fR
return a non\-zero positive integer if the exit\-on\-idle support was successfully enabled\&. They return zero if the exit\-on\-idle support was explicitly disabled with a false
\fIb\fR
parameter\&. On failure, they return a negative errno\-style error code\&.
.SS "Errors"
.PP
Returned errors may indicate the following problems:
.PP
\fB\-ECHILD\fR
.RS 4
The event loop has been created in a different process, library or module instance\&.
.RE
.PP
\fB\-EINVAL\fR
.RS 4
The passed event loop object was invalid\&.
.RE
.SH "NOTES"
.PP
Functions described here are available as a shared library, which can be compiled against and linked to with the
\fBlibsystemd\fR\ \&\fBpkg-config\fR(1)
file\&.
.PP
The code described here uses
\fBgetenv\fR(3), which is declared to be not multi\-thread\-safe\&. This means that the code calling the functions described here must not call
\fBsetenv\fR(3)
from a parallel thread\&. It is recommended to only do calls to
\fBsetenv()\fR
from an early phase of the program when no other threads have been started\&.
.SH "HISTORY"
.PP
\fBsd_event_set_exit_on_idle()\fR
and
\fBsd_event_get_exit_on_idle()\fR
were added in version 259\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1), \fBsd-event\fR(3), \fBsd_event_new\fR(3), \fBsd_event_add_io\fR(3), \fBsd_event_add_time\fR(3), \fBsd_event_add_signal\fR(3), \fBsd_event_add_child\fR(3), \fBsd_event_add_inotify\fR(3), \fBsd_event_add_defer\fR(3), \fBsystemd.service\fR(5)