Macros starting with `o' in 386BSD-0.1

• _offsetof net/if.c:133
• op1 arch/i386/i386/db_disasm.c:121
• op2 arch/i386/i386/db_disasm.c:122
• op3 arch/i386/i386/db_disasm.c:123
• OPTBIT netinet/ip_output.c:472
• OPTSET netinet/ip_output.c:412