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auparse_feed

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, 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)

AUTHOR

John Dennis