echochar(3) on FreeBSD
The text b64fda8ad312, as FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE, FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE shipped it.
add a character (with attributes) to a curses window, then advance the cursor