I've found that if I want to find something in the source then I start by using grep while sitting in /usr/src/freeswitch/src/ directory. In your case a simple grep yields only two files to look at:

serv01:/usr/src/freeswitch/src# grep -n switch_ivr_record_session *c
switch_core_media_bug.c:612:                    switch_ivr_record_session(new_session, list[i], stop_times[i], NULL);
switch_ivr_async.c:1310:SWITCH_DECLARE(switch_status_t) switch_ivr_record_session_mask(switch_core_session_t *session, const char *file, switch_bool_t on)
switch_ivr_async.c:1872:SWITCH_DECLARE(switch_status_t) switch_ivr_record_session(switch_core_session_t *session, char *file, uint32_t limit, switch_file_handle_t *fh)

That should get you going.
-MC


On Fri, Jul 12, 2013 at 6:35 AM, Brian West <brian@freeswitch.org> wrote:
Look for Media Bugs.
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Em Jul 12, 2013, às 8:09 AM, Sayyed Mohammad Emami Razavi <emamirazavi@gmail.com> escreveu:

> I searched in all FS sources and couldn't find switch_ivr_record_session function to develop! Anybody knows where it is?
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