pam_sm_open_session(3) on FreeBSD
The text dd8d41b0461e, as FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE, FreeBSD 12.4-RELEASE, FreeBSD 12.3-RELEASE, FreeBSD 11.4-RELEASE, FreeBSD 11.3-RELEASE shipped it.
service module implementation for pam_open_session