Literature

man(1)pages

• nv(8)

jail-specific

• jail(2) jail, jail_get, jail_set, jail_attach syscalls
• jail(3) -ljail bindings
• jail(8) useful for the parameters section

rctl

• rctl(8)
• rctl(4)
• rctl_add_rule(2)

further reading

• Chapter 4. The Jail Subsystem in the FreeBSD Architecture Handbook
• FreeBSD and Jails presentation on bsd-rennes.fr starting from slide 13
• mailing list thread about jail parameter sizes and this followup