Demostration of seek_tail issue.

output

CUTOFF = 1413177397982789
TAIL = 0
NEXT = 1
FOUND from 1400437372012374
NEXT = 1
FOUND from 1400438753925868
NEXT = 1
FOUND from 1400438753926192
NEXT = 1
FOUND from 1400438753926257
NEXT = 1
FOUND from 1400438753926289
NEXT = 1
FOUND from 1400438753926309
NEXT = 1
FOUND from 1400438753926330
NEXT = 1
FOUND from 1400438753926353
NEXT = 1
FOUND from 1400438753926373
NEXT = 1
FOUND from 1400438753926395

tail_logs.c

#include <stdio.h>
#include <assert.h>
#include "systemd/sd-journal.h"

int main() {
    sd_journal* j;
    assert(sd_journal_open(&j, 0)==0);
    uint64_t from, to;
    assert(sd_journal_get_cutoff_realtime_usec(j, &from, &to)==1);
    printf("CUTOFF = %llu\n", to);

    printf("TAIL = %d\n", sd_journal_seek_tail(j));

    for (int i=0; i<10; i++) {
        printf("NEXT = %lld\n", sd_journal_next(j));
        assert(sd_journal_get_realtime_usec(j, &from)==0);
        printf("FOUND from %llu\n", from);
    }
    return 0;
}