NAME | SYNOPSIS | DESCRIPTION | EXAMPLE | RETURN VALUE | SEE ALSO | AUTHOR | COLOPHON

AUPARSE_FEED(3)                Linux Audit API               AUPARSE_FEED(3)

NAME         top

       auparse_feed - feed data into parser

SYNOPSIS         top

       #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

DESCRIPTION         top

       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.

EXAMPLE         top

       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);
       }

RETURN VALUE         top

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

SEE ALSO         top

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

AUTHOR         top

       John Dennis

COLOPHON         top

       This page is part of the audit (Linux Audit) project.  Information
       about the project can be found at 
       ⟨http://people.redhat.com/sgrubb/audit/⟩.  If you have a bug report
       for this manual page, send it to linux-audit@redhat.com.  This page
       was obtained from the project's upstream Git repository 
       ⟨https://github.com/linux-audit/audit-userspace.git⟩ on 2017-05-03.
       If you discover any rendering problems in this HTML version of the
       page, or you believe there is a better or more up-to-date source for
       the page, or you have corrections or improvements to the information
       in this COLOPHON (which is not part of the original manual page),
       send a mail to man-pages@man7.org

Red Hat                           May 2007                   AUPARSE_FEED(3)

Pages that refer to this page: auparse_add_callback(3)auparse_feed_age_events(3)auparse_feed_has_data(3)auparse_flush_feed(3)auparse_init(3)