Attachment 102202 Details for Bug 80858 – test program.

test program.

t-journal-tail.c (text/plain), 1.66 KB, created by Marius Vollmer on 2014-07-03 14:49:15 UTC

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Creator: Marius Vollmer

Created: 2014-07-03 14:49:15 UTC

Size: 1.66 KB

patch

obsolete

>/* cc -o t-journal-tail t-journal-tail.c -lsystemd-journal
> */
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <systemd/sd-journal.h>
>
>void
>check (int r)
>{
>  if (r < 0)
>    {
>      fprintf (stderr, "%s\n", strerror(-r));
>      exit (1);
>    }
>}
>
>void
>checkv (const char *label, int r)
>{
>  if (r < 0)
>    {
>      fprintf (stderr, "%s: %s\n", label, strerror(-r));
>      exit (1);
>    }
>  fprintf (stderr, "%s: %d\n", label, r);
>}
>
>char *
>dump (sd_journal *j, int count)
>{
>  uint64_t last_usec = 0;
>  char *cursor;
>  int i = 0;
>
>  while (i < count) {
>    const void *data;
>    size_t size;
>    uint64_t usec;
>    int r;
>
>    check (sd_journal_get_realtime_usec (j, &usec));
>    check (sd_journal_get_data (j, "MESSAGE", &data, &size));
>    // printf ("%lld %.*s\n", usec, size, data);
>
>    if (usec < last_usec)
>      printf ("back\n");
>    last_usec = usec;
>
>    i++;
>    if (i >= count)
>      break;
>
>    check (r = sd_journal_next (j));
>    if (r == 0) {
>        printf("%d entries, EOF\n", i);
>        return NULL;
>    }
>  }
>
>  check (sd_journal_get_cursor (j, &cursor));
>
>  printf("%d entries, %s\n", i, cursor);
>  return cursor;
>}
>
>void
>match (sd_journal *j, const char *m)
>{
>  check (sd_journal_add_match (j, m, strlen (m)));
>}
>
>void
>main ()
>{
>  sd_journal *j;
>
>  check (sd_journal_open_directory (&j, "/home/mvo/work/XXX/var/log/journal", 0));
>  match (j, "_SYSTEMD_UNIT=NetworkManager.service");
>
>  check (sd_journal_seek_tail (j));
>  check (sd_journal_previous_skip (j, 10));
>
>  while (1) {
>    char *c = dump (j, 2000);
>    if (c == NULL)
>      break;
>    check (sd_journal_seek_cursor (j, c));
>    check (sd_journal_next (j));
>    check (sd_journal_test_cursor (j, c));
>    free (c);
>  }
>
>}

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