Date: Wed, 1 Jan 2003 18:24:40 -0500 (EST) From: Chuck Robey <chuckr@chuckr.org> To: Matthew West <mwest@uct.ac.za> Cc: Tim Kientzle <kientzle@acm.org>, <freebsd-hackers@FreeBSD.ORG> Subject: Re: Reading rc.conf from C programs? Message-ID: <20030101181840.P29988-100000@april.chuckr.org> In-Reply-To: <20030102012042.A16965@apotheosis.org.za>
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On Thu, 2 Jan 2003, Matthew West wrote:
> On Wed, Jan 01, 2003 at 01:51:57PM -0800, Tim Kientzle wrote:
> > I'm trying to figure out how to read and use /etc/rc.conf
> > configuration variables from within a C program.
>
> You could perhaps copy the way that "The Fish" does it?
>
> Take a look at "ports/sysutils/thefish".
>
> The "parser.c" code appears to read /etc/{,defaults/}rc.conf and place
> all the options into a linked list.
If I had full control over a system, I'd write me lex script for it,
that's easily the best way to parse args. Flexible as hell, really easy
to extend, easy to special-case, easy to error-control. Learning lex is
harder than just C code, but it's such a good tool to know just for
general purposes, it's worth the small time spent. Every C programmer
ought to spend some time with lex/flex (and obviously yacc/bison). If you
don't know it for an employer, you're really hobbled, it's *such* a good
tool.
>
>
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Chuck Robey | Interests include C & Java programming, FreeBSD,
chuckr@chuckr.org | electronics, communications, and SF/Fantasy.
New Year's Resolution: I will not sphroxify gullible people into looking up
fictitious words in the dictionary.
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