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AUPARSE_FEED(3) Linux Audit API AUPARSE_FEED(3)

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
May 2007 Red Hat