OK, thanks
> 2014/11/29 13:57、minux <minux...@gmail.com> のメール：
>
> On Fri, Nov 28, 2014 at 11:42 PM, arisawa <aris...@ar.aichi-u.ac.jp> wrote:
>> rc(1) says:
>>
>> rfork [nNeEsfFm]
>> Become a new process group using rfork(flags) where
>> flags is composed of the bitwise OR of the rfork flags
>> specified by the option letters (see fork(2)). If no
>> flags are given, they default to ens. The flags and
>> their meanings are: n is RFNAMEG; N is RFCNAMEG; e is
>> RFENVG; E is RFCENVG; s is RFNOTEG; f is RFFDG; F is
>> RFCFDG; and m is RFNOMNT.
>>
>> this sounds to me
>> rfork
>> is equivalent to
>> rfork ens
> yes. it also agrees with the source code.
> http://plan9.bell-labs.com/sources/plan9/sys/src/cmd/rc/plan9.c:/^execnewpgrp
