man/journal-enumerate-fields.c

   1 /* SPDX-License-Identifier: MIT-0 */
   2
   3 #include <errno.h>
   4 #include <stdio.h>
   5 #include <systemd/sd-journal.h>
   6
   7 int main(int argc, char *argv[]) {
   8   sd_journal *j;
   9   const char *field;
  10   int r;
  11
  12   r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
  13   if (r < 0) {
  14     errno = -r;
  15     fprintf(stderr, "Failed to open journal: %m\n");
  16     return 1;
  17   }
  18   SD_JOURNAL_FOREACH_FIELD(j, field)
  19     printf("%s\n", field);
  20   sd_journal_close(j);
  21   return 0;
  22 }