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);

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

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

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

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

SEE ALSO

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

AUTHOR

John Dennis