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-rw-r--r--src/systemd/sd-event.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/systemd/sd-event.h b/src/systemd/sd-event.h
index 1ea97e47f8..9ded022624 100644
--- a/src/systemd/sd-event.h
+++ b/src/systemd/sd-event.h
@@ -69,7 +69,11 @@ typedef int (*sd_event_handler_t)(sd_event_source *s, void *userdata);
typedef int (*sd_event_io_handler_t)(sd_event_source *s, int fd, uint32_t revents, void *userdata);
typedef int (*sd_event_time_handler_t)(sd_event_source *s, uint64_t usec, void *userdata);
typedef int (*sd_event_signal_handler_t)(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata);
+#if defined __USE_POSIX199309 || defined __USE_XOPEN_EXTENDED
typedef int (*sd_event_child_handler_t)(sd_event_source *s, const siginfo_t *si, void *userdata);
+#else
+typedef void* sd_event_child_handler_t;
+#endif
int sd_event_default(sd_event **e);