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-rw-r--r--man/journal-iterate-poll.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/man/journal-iterate-poll.c b/man/journal-iterate-poll.c
new file mode 100644
index 0000000..100d07e
--- /dev/null
+++ b/man/journal-iterate-poll.c
@@ -0,0 +1,25 @@
+#include <poll.h>
+#include <time.h>
+#include <systemd/sd-journal.h>
+
+int wait_for_changes(sd_journal *j) {
+ uint64_t t;
+ int msec;
+ struct pollfd pollfd;
+
+ sd_journal_get_timeout(j, &t);
+ if (t == (uint64_t) -1)
+ msec = -1;
+ else {
+ struct timespec ts;
+ uint64_t n;
+ clock_gettime(CLOCK_MONOTONIC, &ts);
+ n = (uint64_t) ts.tv_sec * 1000000 + ts.tv_nsec / 1000;
+ msec = t > n ? (int) ((t - n + 999) / 1000) : 0;
+ }
+
+ pollfd.fd = sd_journal_get_fd(j);
+ pollfd.events = sd_journal_get_events(j);
+ poll(&pollfd, 1, msec);
+ return sd_journal_process(j);
+}