[ANN] gmnisrv: a Gemini server for POSIX systems

[Kevin Sangeelee]

Thanks again! This tiny server has around a 3MB resident footprint.

I think having a server capable of managing its own certificates is a great
idea - there have been plenty of issues where a certificate anomaly turned
out to be the problem.

One minor issue - I don't think that C11, as per the readme, supports the
single argument version of static_assert, as used in include/server.h. The
following is suggested: -

8< ----------
diff --git a/include/server.h b/include/server.h
index c6f4a38..c4ea470 100644
--- a/include/server.h
+++ b/include/server.h
@@ -27,7 +27,7 @@ struct gmnisrv_client {
        BIO *bio, *sbio;

        char buf[4096];
-       static_assert(GEMINI_MAX_URL + 3 < 4096);
+       static_assert(GEMINI_MAX_URL + 3 < 4096, "GEMINI_MAX_URL is too
large");
        size_t bufix, bufln;

        enum response_state state;
8< ----------

Kevin




On Sat, 26 Sep 2020 at 23:36, Drew DeVault <sir at cmpwn.com> wrote:

> As promised, I have implemented a Gemini server in C11 for POSIX
> systems: gmnisrv.
>
> gemini://drewdevault.com/gmnisrv.gmi
>
> gmnisrv is a high-performance server which requires next to no
> configuration. You just write a file like this:
>
>         listen=0.0.0.0:1965 [::]:1965
>
>         [:tls]
>         store=/var/lib/gemini/certs
>         organization=gmnisrv user
>
>         [example.org]
>         root=/srv/gemini/example.org
>
>         [example.com]
>         root=/srv/gemini/example.com
>
> Stick it in /etc/gmnisrv.ini, start the daemon, and you're done. It
> automatically generates and rotates certificates for you.
>
> The only dependencies are a C11 compiler, a POSIX-like system, and
> OpenSSL*. It clocks in at about 3,000 lines of code. In the future, I
> would like to add support for some simple URL rewrites and reverse proxy
> support.
>
> * I actually mean OpenSSL when I say it, not LibreSSL or GNUTLS or
>   anything else.
>
> Development info can be found here:
>
> https://sr.ht/~sircmpwn/gmni/
>
> Enjoy!
>
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