Just like bpf(4)... except bpf actually also creates bpf0 still.
$ ls -1 /dev/{b,}pf*
/dev/bpf
/dev/bpf0
/dev/pf
OK?
Index: MAKEDEV.common
===================================================================
RCS file: /cvs/src/etc/MAKEDEV.common,v
retrieving revision 1.115
diff -u -p -r1.115 MAKEDEV.common
--- MAKEDEV.common 7 Jan 2022 01:13:15 -0000 1.115
+++ MAKEDEV.common 6 Nov 2022 12:57:50 -0000
@@ -455,8 +455,8 @@ _mkdev(fdesc, fd, {-RMlist[${#RMlist[*]}
MKlist[${#MKlist[*]}]=";chmod 555 fd"-})dnl
__devitem(oppr, openprom,PROM settings,openprom)dnl
_cdev(oppr, openprom, 70, 0)dnl
-__devitem(pf, pf*, Packet Filter)dnl
-_mkdev(pf, {-pf*-}, {-M pf c major_pf_c 0 600-})dnl
+__devitem(pf, pf, Packet Filter)dnl
+_mkdev(pf, {-pf-}, {-M pf c major_pf_c 0 600-})dnl
__devitem(bpf, bpf, Berkeley Packet Filter)dnl
_mkdev(bpf, bpf, {-M bpf c major_bpf_c 0 600
M bpf0 c major_bpf_c 0 600-})dnl
