char* preprocess_buf(CparsePP *pp, const char *inbuf)
{
// TODO: implement more dynamic allocation
char* outbuf = malloc(4098);
begin_pp(pp);
seterrorline(1);
while (readline_buf(pp, inbuf) && writeline_buf(pp, outbuf))
advanceline(pp->line);
seterrorline(0);
end_pp(pp);
return outbuf;
}
static int retrieve_next_line(auparse_state_t *au)
{
int rc;
// If line was pushed back for re-reading return that
if (au->line_pushed) {
// Starting new event, clear previous event data,
// previous line is returned again for new parsing
au->line_pushed = 0;
au->line_number++;
return 1;
}
switch (au->source)
{
case AUSOURCE_DESCRIPTOR:
case AUSOURCE_FILE_POINTER:
rc = readline_file(au);
if (rc > 0) au->line_number++;
return rc;
case AUSOURCE_LOGS:
case AUSOURCE_FILE:
case AUSOURCE_FILE_ARRAY:
// if the first time through, open file
if (au->list_idx == 0 && au->in == NULL &&
au->source_list != NULL) {
if (au->source_list[au->list_idx] == NULL) {
errno = 0;
return -2;
}
au->line_number = 0;
au->in = fopen(au->source_list[au->list_idx],
"rm");
if (au->in == NULL)
return -1;
__fsetlocking(au->in, FSETLOCKING_BYCALLER);
}
// loop reading lines from a file
while (au->in) {
if ((rc = readline_file(au)) == -2) {
// end of file, open next file,
// try readline again
fclose(au->in);
au->in = NULL;
au->list_idx++;
au->line_number = 0;
if (au->source_list[au->list_idx]) {
au->in = fopen(
au->source_list[au->list_idx],
"rm");
if (au->in == NULL)
return -1;
__fsetlocking(au->in,
FSETLOCKING_BYCALLER);
}
} else {
if (rc > 0)
au->line_number++;
return rc;
}
}
return -2; // return EOF
case AUSOURCE_BUFFER:
case AUSOURCE_BUFFER_ARRAY:
rc = readline_buf(au);
if (rc > 0)
au->line_number++;
return rc;
case AUSOURCE_FEED:
rc = readline_buf(au);
// No such thing as EOF for feed, translate EOF
// to data not available
if (rc == -2)
return 0;
else
if (rc > 0)
au->line_number++;
return rc;
default:
return -1;
}
return -1; /* should never reach here */
}