Manpages - auparse_feed.3

auparse_feed - feed data into parser

#include <auparse.h>

  int auparse_feed(auparse_state_t *au, const char *data, size_t data_len);

au

The audit parse state

data

a buffer of data to feed into the parser, it is data_len bytes long. The data is copied in the parser, upon return the caller may free or reuse the data buffer.

data_len

number of bytes in data

auparse_feed supplies new data for the parser to consume. auparse_init() must have been called with a source type of AUSOURCE_FEED and a NULL pointer.

The parser consumes as much data as it can invoking a user supplied callback specified with auparse_add_callback with a cb_event_type of AUPARSE_CB_EVENT_READY each time the parser recognizes a complete event in the data stream. Data not fully parsed will persist and be prepended to the next feed data. After all data has been feed to the parser auparse_flush_feed should be called to signal the end of input data and flush any pending parse data through the parsing system.

  void
  auparse_callback(auparse_state_t *au, auparse_cb_event_t cb_event_type,
                   void *user_data)
  {
      int *event_cnt = (int *)user_data;

      if (cb_event_type == AUPARSE_CB_EVENT_READY) {
          if (auparse_first_record(au) <= 0) return;
          printf("event: %d\n", *event_cnt);
          printf("records:%d\n", auparse_get_num_records(au));
          do {
              printf("fields:%d\n", auparse_get_num_fields(au));
              printf("type=%d ", auparse_get_type(au));
              const au_event_t *e = auparse_get_timestamp(au);
              if (e == NULL) return;
              printf("event time: %u.%u:%lu\n",
                      (unsigned)e->sec, e->milli, e->serial);
              auparse_first_field(au);
              do {
                  printf("%s=%s (%s)\n", auparse_get_field_name(au),
                         auparse_get_field_str(au),
                         auparse_interpret_field(au));
              } while (auparse_next_field(au) > 0);
              printf("\n");

          } while(auparse_next_record(au) > 0);
          (*event_cnt)++;
      }
  }

  main(int argc, char **argv)
  {	
      char *filename = argv[1];
      FILE *fp;
      char buf[256];
      size_t len;
      int *event_cnt = malloc(sizeof(int));

      au = auparse_init(AUSOURCE_FEED, 0);

      *event_cnt = 1;
      auparse_add_callback(au, auparse_callback, event_cnt, free);

      if ((fp = fopen(filename, "r")) == NULL) {
          fprintf(stderr, "could not open '%s', %s\n", filename, strerror(errno));
          return 1;
      }

      while ((len = fread(buf, 1, sizeof(buf), fp))) {
          auparse_feed(au, buf, len);
      }
      auparse_flush_feed(au);
  }

Returns -1 if an error occurs; otherwise, 0 for success.

*auparse_add_callback*(3), *auparse_flush_feed*(3), *auparse_feed_age_events*(3), *auparse_feed_has_data*(3)

John Dennis