Manpages

NAME

auparse_feed - feed data into parser

SYNOPSIS

#include <auparse.h>

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

data_len

number of bytes in data

DESCRIPTION

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.

RETURN VALUE

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

EXAMPLE

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: %lu.%u:%lu\n",
(long 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);
auparse_set_eoe_timeout(2);

*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);
auparse_destroy(au);
}

SEE ALSO

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

AUTHOR

John Dennis