FreeBSD cocong 15.0-CURRENT FreeBSD 15.0-CURRENT #0 main-n272203-d82cb5c608ae: Wed Sep 11 23:14:58 CDT 2024     root@cocong:/usr/obj/usr/src/amd64.amd64/sys/GENERIC amd64
u4917@cocong:~ % echo 2+2 | bc -l
4
u4917@cocong:~ % bc -l
^D
^C
interrupt (type "quit" to exit)
ready for more input
2+2
4
quit
u4917@cocong:~ % stty -a | grep --color eof
cchars: discard = ^O; dsusp = ^Y; eof = ^D; eol = <undef>;