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A simple, minimalistic ActivityPub instance written in portable C
C 99.6%
Makefile 0.4%
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2025年07月25日 18:57:52 +02:00
artwork Moved avatars to artwork/. 2023年08月04日 19:16:09 +02:00
doc Updated documentation. 2025年07月10日 05:37:02 +02:00
examples Added uid, basedir and baseurl to the notify webhook message. 2025年05月30日 19:43:55 +02:00
po Added Ukrainian translation 2025年07月14日 04:19:27 +02:00
tests enforce tls when supported && add tests 2025年01月24日 22:24:05 +01:00
.gitignore enforce tls when supported && add tests 2025年01月24日 22:24:05 +01:00
activitypub.c More webhook checks. 2025年05月30日 19:59:40 +02:00
data.c New function delete_purged_posts(). 2025年07月25日 18:44:04 +02:00
docker-compose.yaml Add docker-compose support, so a working development server with HTTPS can be started with: 2022年12月12日 10:26:38 +00:00
Dockerfile Improve Docker image generation 2022年12月14日 11:46:16 +01:00
format.c Fixed markdown links with parenthesis. 2025年06月04日 06:57:13 +02:00
html.c Fixed link in tags, when it's an RSS. 2025年07月24日 09:48:50 +02:00
http.c Bumped copyright year. 2025年01月08日 16:59:14 +01:00
http_codes.h More or less smaller fixes :) 2024年05月27日 23:55:51 +02:00
httpd.c Added metadata to nodeinfo 2.0. 2025年07月10日 05:45:22 +02:00
landloc.h update landloc.h 2024年12月30日 11:31:11 +01:00
LICENSE Bumped copyright year. 2025年01月08日 16:59:14 +01:00
main.c New command-line command 'muted'. 2025年07月24日 21:20:48 +02:00
Makefile Sending notes from the cmdline allows setting an inReplyTo field. 2025年06月26日 10:39:47 +02:00
Makefile.NetBSD Sending notes from the cmdline allows setting an inReplyTo field. 2025年06月26日 10:39:47 +02:00
mastoapi.c mastoapi: fixed the fix. 2025年07月05日 19:21:31 +02:00
README.md Updated README. 2025年03月12日 15:58:09 +01:00
RELEASE_NOTES.md Updated RELEASE_NOTES. 2025年07月25日 18:57:52 +02:00
rss.c Call enqueue_actor_fresh() from rss_to_timeline(). 2025年05月30日 09:47:23 +02:00
sandbox.c Minor tweak. 2025年06月04日 06:38:44 +02:00
snac.c xs_webmention.h new file. 2025年05月04日 11:05:47 +02:00
snac.h Bumped version. 2025年07月08日 17:49:48 +02:00
TODO.md Updated TODO. 2025年07月25日 18:55:28 +02:00
upgrade.c Bumped copyright year. 2025年01月08日 16:59:14 +01:00
utils.c Minor CSS tweak. 2025年06月28日 22:46:38 +02:00
webfinger.c Added some const here and there. 2025年07月08日 17:30:45 +02:00
xs.h mastoapi: another try to fix collapsing boosted posts in some apps. 2025年06月12日 10:59:26 +02:00
xs_curl.h xs_webmention.h new file. 2025年05月04日 11:05:47 +02:00
xs_fcgi.h Added some const here and there. 2025年07月08日 17:30:45 +02:00
xs_glob.h Bumped copyright year. 2025年01月08日 16:59:14 +01:00
xs_hex.h Bumped copyright year. 2025年01月08日 16:59:14 +01:00
xs_html.h Minor xs_html tweak. 2025年02月09日 07:18:17 +01:00
xs_httpd.h Added some const here and there. 2025年07月08日 17:30:45 +02:00
xs_io.h Rewrite http header parsing 2025年02月06日 00:47:49 +02:00
xs_json.h Some JSON code tweaks. 2025年06月24日 12:59:02 +02:00
xs_match.h Backport from xs. 2025年01月28日 07:42:08 +01:00
xs_mime.h the fucking list is sotted. oopps 2025年04月13日 14:41:34 +02:00
xs_openssl.h Fix memory leaks 2025年02月04日 13:11:56 +02:00
xs_po.h xs_po.h new file. 2025年02月14日 10:24:13 +01:00
xs_random.h Bumped copyright year. 2025年01月08日 16:59:14 +01:00
xs_regex.h Added some checks to xs_regex_split_n(). 2025年02月11日 18:50:14 +01:00
xs_set.h Bumped copyright year. 2025年01月08日 16:59:14 +01:00
xs_socket.h Fix memory leaks 2025年02月04日 13:11:56 +02:00
xs_time.h Also added UTC+... timezones. 2025年04月16日 05:05:51 +02:00
xs_unicode.h Bumped copyright year. 2025年01月08日 16:59:14 +01:00
xs_unicode_tbl.h New function xs_unicode_right_to_left(). 2024年11月20日 18:10:02 +01:00
xs_unix_socket.h Bumped copyright year. 2025年01月08日 16:59:14 +01:00
xs_url.h Fix memory leak in multipart parsing 2025年02月21日 17:03:49 +02:00
xs_version.h Added some const here and there. 2025年07月08日 17:30:45 +02:00
xs_webmention.h Added a webmention hook. 2025年06月24日 14:06:41 +02:00

snac

A simple, minimalistic ActivityPub instance

Features

  • Lightweight, minimal dependencies
  • Extensive support of ActivityPub operations, e.g. write public notes, follow users, be followed, reply to the notes of others, admire wonderful content (like or boost), write private messages...
  • Multiuser
  • Mastodon API support, so Mastodon-compatible apps can be used
  • Simple but effective web interface
  • Easily-accessed MUTE button to silence morons
  • Tested interoperability with related software
  • No database needed
  • Totally JavaScript-free
  • No cookies either
  • Not much bullshit

About

This program runs as a daemon (proxied by a TLS-enabled real httpd server) and provides the basic services for a Fediverse / ActivityPub instance (sharing messages and stuff from/to other systems like Mastodon, Pleroma, Friendica, etc.).

This is not the manual; man pages snac(1) (user manual), snac(5) (formats) and snac(8) (administrator manual) are what you are looking for.

snac stands for Social Networks Are Crap.

Building and installation

This program is written in highly portable C. It uses the __attribute__((__cleanup__)) GNU extension, that is supported at least by the gcc, clang and tcc C compilers. The only external dependencies are openssl and curl.

On Debian/Ubuntu, you can satisfy these requirements by running

apt install libssl-dev libcurl4-openssl-dev

On OpenBSD you just need to install curl:

pkg_add curl

On FreeBSD, to install curl just type:

pkg install curl

On NetBSD, to install curl just type:

pkgin install curl

The source code is available here.

Run make and then make install as root.

If you're compiling on NetBSD, you should use the specific provided Makefile and run make -f Makefile.NetBSD and then make -f Makefile.NetBSD install as root.

From version 2.27, snac includes support for the Mastodon API; if you are not interested on it, you can compile it out by running

make CFLAGS=-DNO_MASTODON_API

If your compilation process complains about undefined references to shm_open() and shm_unlink() (it happens, for example, on Ubuntu 20.04.6 LTS), run it as:

make LDFLAGS=-lrt

If it still gives compilation errors (because your system does not implement the shared memory functions), you can fix it with

make CFLAGS=-DWITHOUT_SHM

From version 2.68, Linux Landlock sandboxing is included (not supported on Linux kernels older than 5.13.0). It's still a bit experimental, so you must compile it in explicitly with

make CFLAGS=-DWITH_LINUX_SANDBOX

From version 2.73, the language of the web UI can be configured; the po/ source subdirectory includes a set of translation files, one per language. After initializing your instance, copy whatever language file you want to use to the lang/ subdirectory of the base directory.

See the administrator manual on how to proceed from here.

Testing via Docker

A docker-compose file is provided for development and testing. To start snac with an nginx HTTPS frontend, run:

docker-compose build && docker-compose up

This will:

  • Start snac, storing data in data/
  • Configure snac to listen on port 8001 with a server name of localhost (see examples/docker-entrypoint.sh)
  • Create a new user testuser and print the user's generated password on the console (see examples/docker-entrypoint.sh)
  • Start nginx to handle HTTPS, using the certificate pair from nginx-alpine-ssl/nginx-selfsigned.* (see examples/nginx-alpine-ssl/entrypoint.sh)

Links of Interest

Incredibly awesome CSS themes for snac

License

See the LICENSE file for details.

Author

grunfink @grunfink@comam.es with the help of others.

Buy grunfink a coffee: https://ko-fi.com/grunfink/

Contribute via LiberaPay: https://liberapay.com/grunfink/