pin
DragonFlyBSD (in USB install image)
root@:/tmp # uname -a
DragonFly 6.5-DEVELOPMENT DragonFly v6.5.0.748.g83e706-DEVELOPMENT #0: Tue Sep 3 10:16:22 UTC 2024 root@pkgbox64.dragonflybsd.org:/usr/obj/usr/src/sys/X86_64_GENERIC x86_64
root@:/tmp # getconf ARG_MAX
262144
root@:/tmp #
FreeBSD
root@CoreBook:~ # uname -a
FreeBSD CoreBook.local 14.1-RELEASE-p3 FreeBSD 14.1-RELEASE-p3 GENERIC amd64
root@CoreBook:~ # getconf ARG_MAX
524288
root@CoreBook:~ #
OpenBSD
CoreBook# uname -a
OpenBSD CoreBook.my.domain 7.5 GENERIC#79 amd64
CoreBook# getconf ARG_MAX
524288
CoreBook#
In any case, none of these limits ought to matter when there's xargs handy.