summaryrefslogtreecommitdiff
path: root/man/journal-iterate-unique.c
blob: 5fe98b36b75d20571acd9e32164dd4a88f959d26 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
/* SPDX-License-Identifier: MIT-0 */

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

int main(int argc, char *argv[]) {
  sd_journal *j;
  const void *d;
  size_t l;
  int r;

  r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
  if (r < 0) {
    errno = -r;
    fprintf(stderr, "Failed to open journal: %m\n");
    return 1;
  }
  r = sd_journal_query_unique(j, "_SYSTEMD_UNIT");
  if (r < 0) {
    errno = -r;
    fprintf(stderr, "Failed to query journal: %m\n");
    return 1;
  }
  SD_JOURNAL_FOREACH_UNIQUE(j, d, l)
    printf("%.*s\n", (int) l, (const char*) d);
  sd_journal_close(j);
  return 0;
}