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From: gatech!skeeve!arnold@harvard.harvard.edu (Arnold D. Robbins)
Date: Fri, 23 Aug 1991 15:47:49 -0500
X-Mailer: Mail User's Shell (6.5.6 6/30/89)
To: Boyd Roberts <emory!prl.dec.com!boyd@harvard.harvard.edu>,
	rc@archone.tamu.edu
Subject: Re: early reaction(s) to rc
Message-Id: <9108231647.AA01674@skeeve.ATL.GA.US>

> Duff told me:
> 
>     rcmain does the flags that affect initialization, to wit:
>           -p      `protected' -- don't read functions, set path=(. /bin)
>           -c      execute a command given on the command line
>           -i      `interactive' -- print prompts for commands
>           -l      `login shell' -- read $home/lib/profile before user's commands

I would love to know how this works.  -c is trivial:

	eval $*(2) ; exit

and so is -l, but -p and -i are harder --- is there some secret equivalent
of `set' in his rc?  In other words, how does the rc program tell the
shell itself what to do with the environment and whether or not to prompt?

Thanks,

Arnold