Date: Fri, 18 May 2001 14:17:44 -0400 From: Michael Dungan <vega@res142a-008.rh.rit.edu> To: nathan@vidican.com Cc: questions@freebsd.org Subject: Re: OT: accessing environment variables using C/C++ Message-ID: <20010518141744.A49140@rit.edu> In-Reply-To: <3B056427.9090809@wmptl.com>; from webmaster@wmptl.com on Fri, May 18, 2001 at 02:04:23PM -0400 References: <3B056427.9090809@wmptl.com>
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On Fri, May 18, 2001 at 02:04:23PM -0400, Nathan Vidican wrote:
> Not sure where else to ask, I've tried a myriad of IRC channels, etc to
> no avail. So I figured I'd ask here, seeing as how the broad range of
> people who are on this list will most likely have someone who's done
> this before me.
>
> What I need to know, is how to access an environment variable from C. I
> usually program in PERL, and have a very limited amount of experience
> with C/C++. This will be my first attempt at creating an application. I
> am trying to convert something I wrote in PERL to C.
>
> It's a simple CGI script, which accesses a few server-side environment
> variables. In PERL for example, I can access the value of HTTP_REFERER,
> using the hash of environment variables, and the key HTTP_REFERER; like
> so: $ENV{'HTTP_REFERER'}. However I want to try and do the same from C,
> but that far have been unable to figure out how to call upon environment
> variables.
>
> In short, if anyone could provide me a quick blotch of code, (say a
> declaration, and an assignment), which demonstrates the usage of an
> environment variable it would be much appreciated.
Is getenv(3) what you want?
> Nathan Vidican
> webmaster@wmptl.com
mpd
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