2.54
main.c
1/* snac - A simple, minimalistic ActivityPub instance */
2/* copyright (c) 2022 - 2024 grunfink et al. / MIT license */
3
4#include "xs.h"
5#include "xs_io.h"
6#include "xs_json.h"
7#include "xs_time.h"
8#include "xs_openssl.h"
9
10#include "snac.h"
11
12#include <sys/stat.h>
13
14int usage(void)
15{
16 printf("snac " VERSION " - A simple, minimalistic ActivityPub instance\n");
17 printf("Copyright (c) 2022 - 2024 grunfink et al. / MIT license\n");
18 printf("\n");
19 printf("Commands:\n");
20 printf("\n");
21 printf("init [{basedir}] Initializes the data storage\n");
22 printf("upgrade {basedir} Upgrade to a new version\n");
23 printf("adduser {basedir} [{uid}] Adds a new user\n");
24 printf("deluser {basedir} {uid} Deletes a user\n");
25 printf("httpd {basedir} Starts the HTTPD daemon\n");
26 printf("purge {basedir} Purges old data\n");
27 printf("state {basedir} Prints server state\n");
28 printf("webfinger {basedir} {actor} Queries about an actor (@user@host or actor url)\n");
29 printf("queue {basedir} {uid} Processes a user queue\n");
30 printf("follow {basedir} {uid} {actor} Follows an actor\n");
31 printf("unfollow {basedir} {uid} {actor} Unfollows an actor\n");
32 printf("request {basedir} {uid} {url} Requests an object\n");
33 printf("actor {basedir} [{uid}] {url} Requests an actor\n");
34 printf("note {basedir} {uid} {text} [files...] Sends a note with optional attachments\n");
35 printf("boost|announce {basedir} {uid} {url} Boosts (announces) a post\n");
36 printf("unboost {basedir} {uid} {url} Unboosts a post\n");
37 printf("resetpwd {basedir} {uid} Resets the password of a user\n");
38 printf("ping {basedir} {uid} {actor} Pings an actor\n");
39 printf("webfinger_s {basedir} {uid} {actor} Queries about an actor (@user@host or actor url)\n");
40 printf("pin {basedir} {uid} {msg_url} Pins a message\n");
41 printf("unpin {basedir} {uid} {msg_url} Unpins a message\n");
42 printf("block {basedir} {instance_url} Blocks a full instance\n");
43 printf("unblock {basedir} {instance_url} Unblocks a full instance\n");
44 printf("limit {basedir} {uid} {actor} Limits an actor (drops their announces)\n");
45 printf("unlimit {basedir} {uid} {actor} Unlimits an actor\n");
46 printf("verify_links {basedir} {uid} Verifies a user's links (in the metadata)\n");
47 printf("search {basedir} {uid} {regex} Searches posts by content\n");
48
49 return 1;
50}
51
52
53char *get_argv(int *argi, int argc, char *argv[])
54{
55 if (*argi < argc)
56 return argv[(*argi)++];
57 else
58 return NULL;
59}
60
61
62#define GET_ARGV() get_argv(&argi, argc, argv)
63
64int main(int argc, char *argv[])
65{
66 char *cmd;
67 char *basedir;
68 char *user;
69 char *url;
70 int argi = 1;
71 snac snac;
72
73 /* ensure group has write access */
74 umask(0007);
75
76 if ((cmd = GET_ARGV()) == NULL)
77 return usage();
78
79 if (strcmp(cmd, "init") == 0) { /** **/
80 /* initialize the data storage */
81 /* ... */
82 basedir = GET_ARGV();
83
84 return snac_init(basedir);
85 }
86
87 if (strcmp(cmd, "upgrade") == 0) { /** **/
88 int ret;
89
90 /* upgrade */
91 if ((basedir = GET_ARGV()) == NULL)
92 return usage();
93
94 if ((ret = srv_open(basedir, 1)) == 1)
95 srv_log(xs_dup("OK"));
96
97 return ret;
98 }
99
100 if (strcmp(cmd, "markdown") == 0) { /** **/
101 /* undocumented, for testing only */
102 xs *c = xs_readall(stdin);
103 xs *fc = not_really_markdown(c, NULL, NULL);
104
105 printf("<html>\n%s\n</html>\n", fc);
106 return 0;
107 }
108
109 if ((basedir = GET_ARGV()) == NULL)
110 return usage();
111
112 if (!srv_open(basedir, 0)) {
113 srv_log(xs_fmt("error opening data storage at %s", basedir));
114 return 1;
115 }
116
117 if (strcmp(cmd, "adduser") == 0) { /** **/
118 user = GET_ARGV();
119
120 return adduser(user);
121
122 return 0;
123 }
124
125 if (strcmp(cmd, "httpd") == 0) { /** **/
126 httpd();
127 srv_free();
128 return 0;
129 }
130
131 if (strcmp(cmd, "purge") == 0) { /** **/
132 purge_all();
133 return 0;
134 }
135
136 if (strcmp(cmd, "state") == 0) { /** **/
137 xs *shm_name = NULL;
138 srv_state *p_state = srv_state_op(&shm_name, 1);
139
140 if (p_state == NULL)
141 return 1;
142
143 srv_state ss = *p_state;
144 int n;
145
146 printf("server: %s (%s)\n", xs_dict_get(srv_config, "host"), USER_AGENT);
147 xs *uptime = xs_str_time_diff(time(NULL) - ss.srv_start_time);
148 printf("uptime: %s\n", uptime);
149 printf("job fifo size (cur): %d\n", ss.job_fifo_size);
150 printf("job fifo size (peak): %d\n", ss.peak_job_fifo_size);
151 char *th_states[] = { "stopped", "waiting", "input", "output" };
152
153 for (n = 0; n < ss.n_threads; n++)
154 printf("thread #%d state: %s\n", n, th_states[ss.th_state[n]]);
155
156 return 0;
157 }
158
159 if ((user = GET_ARGV()) == NULL)
160 return usage();
161
162 if (strcmp(cmd, "block") == 0) { /** **/
163 int ret = instance_block(user);
164
165 if (ret < 0) {
166 fprintf(stderr, "Error blocking instance %s: %d\n", user, ret);
167 return 1;
168 }
169
170 return 0;
171 }
172
173 if (strcmp(cmd, "unblock") == 0) { /** **/
174 int ret = instance_unblock(user);
175
176 if (ret < 0) {
177 fprintf(stderr, "Error unblocking instance %s: %d\n", user, ret);
178 return 1;
179 }
180
181 return 0;
182 }
183
184 if (strcmp(cmd, "webfinger") == 0) { /** **/
185 xs *actor = NULL;
186 xs *uid = NULL;
187 int status;
188
189 status = webfinger_request(user, &actor, &uid);
190
191 printf("status: %d\n", status);
192 if (actor != NULL)
193 printf("actor: %s\n", actor);
194 if (uid != NULL)
195 printf("uid: %s\n", uid);
196
197 return 0;
198 }
199
200 if (argi == argc && strcmp(cmd, "actor") == 0) { /** **/
201 /* query an actor without user (non-signed) */
202 xs *actor = NULL;
203 int status;
204
205 status = actor_request(NULL, user, &actor);
206
207 printf("status: %d\n", status);
208 if (valid_status(status)) {
209 xs_json_dump(actor, 4, stdout);
210 printf("\n");
211 }
212
213 return 0;
214 }
215
216 if (!user_open(&snac, user)) {
217 printf("invalid user '%s'\n", user);
218 return 1;
219 }
220
221 lastlog_write(&snac, "cmdline");
222
223 if (strcmp(cmd, "resetpwd") == 0) { /** **/
224 return resetpwd(&snac);
225 }
226
227 if (strcmp(cmd, "deluser") == 0) { /** **/
228 return deluser(&snac);
229 }
230
231 if (strcmp(cmd, "update") == 0) { /** **/
232 xs *a_msg = msg_actor(&snac);
233 xs *u_msg = msg_update(&snac, a_msg);
234 enqueue_message(&snac, u_msg);
235 return 0;
236 }
237
238 if (strcmp(cmd, "queue") == 0) { /** **/
239 process_user_queue(&snac);
240 return 0;
241 }
242
243 if (strcmp(cmd, "verify_links") == 0) { /** **/
244 verify_links(&snac);
245 return 0;
246 }
247
248 if (strcmp(cmd, "timeline") == 0) { /** **/
249#if 0
250 xs *list = local_list(&snac, XS_ALL);
251 xs *body = html_timeline(&snac, list, 1);
252
253 printf("%s\n", body);
254 user_free(&snac);
255 srv_free();
256#endif
257
258 xs *idx = xs_fmt("%s/private.idx", snac.basedir);
259 xs *list = index_list_desc(idx, 0, 256);
260 xs *tl = timeline_top_level(&snac, list);
261
262 xs_json_dump(tl, 4, stdout);
263
264 return 0;
265 }
266
267 if ((url = GET_ARGV()) == NULL)
268 return usage();
269
270 if (strcmp(cmd, "webfinger_s") == 0) { /** **/
271 xs *actor = NULL;
272 xs *uid = NULL;
273 int status;
274
275 status = webfinger_request_signed(&snac, url, &actor, &uid);
276
277 printf("status: %d\n", status);
278 if (actor != NULL)
279 printf("actor: %s\n", actor);
280 if (uid != NULL)
281 printf("uid: %s\n", uid);
282
283 return 0;
284 }
285
286 if (strcmp(cmd, "boost") == 0 || strcmp(cmd, "announce") == 0) { /** **/
287 xs *msg = msg_admiration(&snac, url, "Announce");
288
289 if (msg != NULL) {
290 enqueue_message(&snac, msg);
291
292 if (dbglevel) {
293 xs_json_dump(msg, 4, stdout);
294 }
295 }
296
297 return 0;
298 }
299
300 if (strcmp(cmd, "unboost") == 0) { /** **/
301 xs *msg = msg_repulsion(&snac, url, "Announce");
302
303 if (msg != NULL) {
304 enqueue_message(&snac, msg);
305
306 if (dbglevel) {
307 xs_json_dump(msg, 4, stdout);
308 }
309 }
310
311 return 0;
312 }
313
314 if (strcmp(cmd, "follow") == 0) { /** **/
315 xs *msg = msg_follow(&snac, url);
316
317 if (msg != NULL) {
318 const char *actor = xs_dict_get(msg, "object");
319
320 following_add(&snac, actor, msg);
321
322 enqueue_output_by_actor(&snac, msg, actor, 0);
323
324 if (dbglevel) {
325 xs_json_dump(msg, 4, stdout);
326 }
327 }
328
329 return 0;
330 }
331
332 if (strcmp(cmd, "unfollow") == 0) { /** **/
333 xs *object = NULL;
334
335 if (valid_status(following_get(&snac, url, &object))) {
336 xs *msg = msg_undo(&snac, xs_dict_get(object, "object"));
337
338 following_del(&snac, url);
339
340 enqueue_output_by_actor(&snac, msg, url, 0);
341
342 snac_log(&snac, xs_fmt("unfollowed actor %s", url));
343 }
344 else
345 snac_log(&snac, xs_fmt("actor is not being followed %s", url));
346
347 return 0;
348 }
349
350 if (strcmp(cmd, "limit") == 0) { /** **/
351 int ret;
352
353 if (!following_check(&snac, url))
354 snac_log(&snac, xs_fmt("actor %s is not being followed", url));
355 else
356 if ((ret = limit(&snac, url)) == 0)
357 snac_log(&snac, xs_fmt("actor %s is now limited", url));
358 else
359 snac_log(&snac, xs_fmt("error limiting actor %s (%d)", url, ret));
360
361 return 0;
362 }
363
364 if (strcmp(cmd, "unlimit") == 0) { /** **/
365 int ret;
366
367 if (!following_check(&snac, url))
368 snac_log(&snac, xs_fmt("actor %s is not being followed", url));
369 else
370 if ((ret = unlimit(&snac, url)) == 0)
371 snac_log(&snac, xs_fmt("actor %s is no longer limited", url));
372 else
373 snac_log(&snac, xs_fmt("error unlimiting actor %s (%d)", url, ret));
374
375 return 0;
376 }
377
378 if (strcmp(cmd, "search") == 0) { /** **/
379 int to;
380
381 /* 'url' contains the regex */
382 xs *r = content_search(&snac, url, 1, 0, XS_ALL, 10, &to);
383
384 int c = 0;
385 const char *v;
386
387 /* print results as standalone links */
388 while (xs_list_next(r, &v, &c)) {
389 printf("%s/admin/p/%s\n", snac.actor, v);
390 }
391
392 return 0;
393 }
394
395 if (strcmp(cmd, "ping") == 0) { /** **/
396 xs *actor_o = NULL;
397
398 if (!xs_startswith(url, "https:/")) {
399 /* try to resolve via webfinger */
400 if (!valid_status(webfinger_request(url, &url, NULL))) {
401 srv_log(xs_fmt("cannot resolve %s via webfinger", url));
402 return 1;
403 }
404 }
405
406 if (valid_status(actor_request(&snac, url, &actor_o))) {
407 xs *msg = msg_ping(&snac, url);
408
409 enqueue_output_by_actor(&snac, msg, url, 0);
410
411 if (dbglevel) {
412 xs_json_dump(msg, 4, stdout);
413 }
414
415 srv_log(xs_fmt("Ping sent to %s -- see log for Pong reply", url));
416 }
417 else {
418 srv_log(xs_fmt("Error getting actor %s", url));
419 return 1;
420 }
421
422 return 0;
423 }
424
425 if (strcmp(cmd, "pin") == 0) { /** **/
426 int ret = pin(&snac, url);
427 if (ret < 0) {
428 fprintf(stderr, "error pinning %s %d\n", url, ret);
429 return 1;
430 }
431
432 return 0;
433 }
434
435 if (strcmp(cmd, "unpin") == 0) { /** **/
436 int ret = unpin(&snac, url);
437 if (ret < 0) {
438 fprintf(stderr, "error unpinning %s %d\n", url, ret);
439 return 1;
440 }
441
442 return 0;
443 }
444
445 if (strcmp(cmd, "question") == 0) { /** **/
446 int end_secs = 5 * 60;
447 xs *opts = xs_split(url, ";");
448
449 xs *msg = msg_question(&snac, "Poll", NULL, opts, 0, end_secs);
450 xs *c_msg = msg_create(&snac, msg);
451
452 if (dbglevel) {
453 xs_json_dump(c_msg, 4, stdout);
454 }
455
456 enqueue_message(&snac, c_msg);
457 enqueue_close_question(&snac, xs_dict_get(msg, "id"), end_secs);
458
459 timeline_add(&snac, xs_dict_get(msg, "id"), msg);
460
461 return 0;
462 }
463
464 if (strcmp(cmd, "request") == 0) { /** **/
465 int status;
466 xs *data = NULL;
467
468 status = activitypub_request(&snac, url, &data);
469
470 printf("status: %d\n", status);
471
472 if (data != NULL) {
473 xs_json_dump(data, 4, stdout);
474 }
475
476 return 0;
477 }
478
479 if (strcmp(cmd, "request2") == 0) { /** **/
480 enqueue_object_request(&snac, url, 2);
481
482 return 0;
483 }
484
485 if (strcmp(cmd, "actor") == 0) { /** **/
486 int status;
487 xs *data = NULL;
488
489 status = actor_request(&snac, url, &data);
490
491 printf("status: %d\n", status);
492
493 if (valid_status(status)) {
494 xs_json_dump(data, 4, stdout);
495 }
496
497 return 0;
498 }
499
500 if (strcmp(cmd, "note") == 0) { /** **/
501 xs *content = NULL;
502 xs *msg = NULL;
503 xs *c_msg = NULL;
504 xs *attl = xs_list_new();
505 char *fn = NULL;
506
507 /* iterate possible attachments */
508 while ((fn = GET_ARGV())) {
509 FILE *f;
510
511 if ((f = fopen(fn, "rb")) != NULL) {
512 /* get the file size and content */
513 fseek(f, 0, SEEK_END);
514 int sz = ftell(f);
515 fseek(f, 0, SEEK_SET);
516 xs *atc = xs_readall(f);
517 fclose(f);
518
519 char *ext = strrchr(fn, '.');
520 xs *hash = xs_md5_hex(fn, strlen(fn));
521 xs *id = xs_fmt("%s%s", hash, ext);
522 xs *url = xs_fmt("%s/s/%s", snac.actor, id);
523
524 /* store */
525 static_put(&snac, id, atc, sz);
526
527 xs *l = xs_list_new();
528
529 l = xs_list_append(l, url);
530 l = xs_list_append(l, ""); /* alt text */
531
532 attl = xs_list_append(attl, l);
533 }
534 else
535 fprintf(stderr, "Error opening '%s' as attachment\n", fn);
536 }
537
538 if (strcmp(url, "-e") == 0) {
539 /* get the content from an editor */
540 FILE *f;
541
542 unlink("/tmp/snac-edit.txt");
543 system("$EDITOR /tmp/snac-edit.txt");
544
545 if ((f = fopen("/tmp/snac-edit.txt", "r")) != NULL) {
546 content = xs_readall(f);
547 fclose(f);
548
549 unlink("/tmp/snac-edit.txt");
550 }
551 else {
552 printf("Nothing to send\n");
553 return 1;
554 }
555 }
556 else
557 if (strcmp(url, "-") == 0) {
558 /* get the content from stdin */
559 content = xs_readall(stdin);
560 }
561 else
562 content = xs_dup(url);
563
564 msg = msg_note(&snac, content, NULL, NULL, attl, 0);
565
566 c_msg = msg_create(&snac, msg);
567
568 if (dbglevel) {
569 xs_json_dump(c_msg, 4, stdout);
570 }
571
572 enqueue_message(&snac, c_msg);
573
574 timeline_add(&snac, xs_dict_get(msg, "id"), msg);
575
576 return 0;
577 }
578
579 fprintf(stderr, "ERROR: bad command '%s'\n", cmd);
580
581 return 1;
582}
