2 * Copyright (c) 2024 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
18 #include <sys/queue.h>
20 #include <sys/socket.h>
36 #include "got_error.h"
44 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
47 static struct gotd_notify {
50 struct gotd_imsgev parent_iev;
51 struct gotd_repolist *repos;
52 const char *default_sender;
55 struct gotd_notify_session {
56 STAILQ_ENTRY(gotd_notify_session) entry;
58 struct gotd_imsgev iev;
60 STAILQ_HEAD(gotd_notify_sessions, gotd_notify_session);
62 static struct gotd_notify_sessions gotd_notify_sessions[GOTD_CLIENT_TABLE_SIZE];
63 static SIPHASH_KEY sessions_hash_key;
65 static void gotd_notify_shutdown(void);
68 session_hash(uint32_t session_id)
70 return SipHash24(&sessions_hash_key, &session_id, sizeof(session_id));
74 add_session(struct gotd_notify_session *session)
78 slot = session_hash(session->id) % nitems(gotd_notify_sessions);
79 STAILQ_INSERT_HEAD(&gotd_notify_sessions[slot], session, entry);
82 static struct gotd_notify_session *
83 find_session(uint32_t session_id)
86 struct gotd_notify_session *s;
88 slot = session_hash(session_id) % nitems(gotd_notify_sessions);
89 STAILQ_FOREACH(s, &gotd_notify_sessions[slot], entry) {
90 if (s->id == session_id)
97 static struct gotd_notify_session *
98 find_session_by_fd(int fd)
101 struct gotd_notify_session *s;
103 for (slot = 0; slot < nitems(gotd_notify_sessions); slot++) {
104 STAILQ_FOREACH(s, &gotd_notify_sessions[slot], entry) {
105 if (s->iev.ibuf.fd == fd)
116 remove_session(struct gotd_notify_session *session)
120 slot = session_hash(session->id) % nitems(gotd_notify_sessions);
121 STAILQ_REMOVE(&gotd_notify_sessions[slot], session,
122 gotd_notify_session, entry);
134 duplicate = (find_session(id) != NULL);
135 } while (duplicate || id == 0);
141 gotd_notify_sighdlr(int sig, short event, void *arg)
144 * Normal signal handler rules don't apply because libevent
150 log_info("%s: ignoring SIGHUP", __func__);
153 log_info("%s: ignoring SIGUSR1", __func__);
157 gotd_notify_shutdown();
161 fatalx("unexpected signal");
166 run_notification_helper(const char *prog, const char **argv, int fd)
168 const struct got_error *err = NULL;
174 err = got_error_from_errno("fork");
175 log_warn("%s", err->msg);
177 } else if (pid == 0) {
178 signal(SIGQUIT, SIG_DFL);
179 signal(SIGINT, SIG_DFL);
180 signal(SIGCHLD, SIG_DFL);
182 if (dup2(fd, STDIN_FILENO) == -1) {
183 fprintf(stderr, "%s: dup2: %s\n", getprogname(),
188 closefrom(STDERR_FILENO + 1);
190 if (execv(prog, (char *const *)argv) == -1) {
191 fprintf(stderr, "%s: exec %s: %s\n", getprogname(),
192 prog, strerror(errno));
199 if (waitpid(pid, &child_status, 0) == -1) {
200 err = got_error_from_errno("waitpid");
204 if (!WIFEXITED(child_status)) {
205 err = got_error(GOT_ERR_PRIVSEP_DIED);
209 if (WEXITSTATUS(child_status) != 0)
210 err = got_error(GOT_ERR_PRIVSEP_EXIT);
213 log_warnx("%s: child %s pid %d: %s", gotd_notify.title,
214 prog, pid, err->msg);
218 notify_email(struct gotd_notification_target *target, const char *subject_line,
221 const char *argv[13];
224 argv[i++] = GOTD_PATH_PROG_NOTIFY_EMAIL;
227 if (target->conf.email.sender)
228 argv[i++] = target->conf.email.sender;
230 argv[i++] = gotd_notify.default_sender;
232 if (target->conf.email.responder) {
234 argv[i++] = target->conf.email.responder;
237 if (target->conf.email.hostname) {
239 argv[i++] = target->conf.email.hostname;
242 if (target->conf.email.port) {
244 argv[i++] = target->conf.email.port;
248 argv[i++] = subject_line;
250 argv[i++] = target->conf.email.recipient;
254 run_notification_helper(GOTD_PATH_PROG_NOTIFY_EMAIL, argv, fd);
258 notify_http(struct gotd_notification_target *target, const char *subject_line,
261 const char *argv[10] = { 0 }; /* TODO */
263 run_notification_helper(GOTD_PATH_PROG_NOTIFY_HTTP, argv, fd);
266 static const struct got_error *
267 send_notification(struct imsg *imsg, struct gotd_imsgev *iev)
269 const struct got_error *err = NULL;
270 struct gotd_imsg_notify inotify;
272 struct gotd_repo *repo;
273 struct gotd_notification_target *target;
276 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
277 if (datalen != sizeof(inotify))
278 return got_error(GOT_ERR_PRIVSEP_LEN);
280 memcpy(&inotify, imsg->data, datalen);
282 repo = gotd_find_repo_by_name(inotify.repo_name, gotd_notify.repos);
284 return got_error(GOT_ERR_PRIVSEP_MSG);
286 fd = imsg_get_fd(imsg);
288 return got_error(GOT_ERR_PRIVSEP_NO_FD);
290 if (lseek(fd, 0, SEEK_SET) == -1) {
291 err = got_error_from_errno("lseek");
295 STAILQ_FOREACH(target, &repo->notification_targets, entry) {
296 switch (target->type) {
297 case GOTD_NOTIFICATION_VIA_EMAIL:
298 notify_email(target, inotify.subject_line, fd);
300 case GOTD_NOTIFICATION_VIA_HTTP:
301 notify_http(target, inotify.subject_line, fd);
306 if (gotd_imsg_compose_event(iev, GOTD_IMSG_NOTIFICATION_SENT,
307 PROC_NOTIFY, -1, NULL, 0) == -1) {
308 err = got_error_from_errno("imsg compose NOTIFY");
317 notify_dispatch_session(int fd, short event, void *arg)
319 struct gotd_imsgev *iev = arg;
320 struct imsgbuf *ibuf = &iev->ibuf;
325 if (event & EV_READ) {
326 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
327 fatal("imsg_read error");
329 /* Connection closed. */
335 if (event & EV_WRITE) {
336 n = msgbuf_write(&ibuf->w);
337 if (n == -1 && errno != EAGAIN)
338 fatal("msgbuf_write");
340 /* Connection closed. */
347 const struct got_error *err = NULL;
349 if ((n = imsg_get(ibuf, &imsg)) == -1)
350 fatal("%s: imsg_get error", __func__);
351 if (n == 0) /* No more messages. */
354 switch (imsg.hdr.type) {
355 case GOTD_IMSG_NOTIFY:
356 err = send_notification(&imsg, iev);
359 log_debug("unexpected imsg %d", imsg.hdr.type);
365 log_warnx("%s: %s", __func__, err->msg);
369 gotd_imsg_event_add(iev);
371 struct gotd_notify_session *session;
373 /* This pipe is dead. Remove its event handler */
375 imsg_clear(&iev->ibuf);
377 session = find_session_by_fd(fd);
379 remove_session(session);
383 static const struct got_error *
384 recv_session(struct imsg *imsg)
386 struct gotd_notify_session *session;
390 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
392 return got_error(GOT_ERR_PRIVSEP_LEN);
394 fd = imsg_get_fd(imsg);
396 return got_error(GOT_ERR_PRIVSEP_NO_FD);
398 session = calloc(1, sizeof(*session));
400 return got_error_from_errno("calloc");
402 session->id = get_session_id();
403 imsg_init(&session->iev.ibuf, fd);
404 session->iev.handler = notify_dispatch_session;
405 session->iev.events = EV_READ;
406 session->iev.handler_arg = NULL;
407 event_set(&session->iev.ev, session->iev.ibuf.fd, EV_READ,
408 notify_dispatch_session, &session->iev);
409 gotd_imsg_event_add(&session->iev);
410 add_session(session);
416 notify_dispatch(int fd, short event, void *arg)
418 struct gotd_imsgev *iev = arg;
419 struct imsgbuf *ibuf = &iev->ibuf;
424 if (event & EV_READ) {
425 if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
426 fatal("imsg_read error");
428 /* Connection closed. */
434 if (event & EV_WRITE) {
435 n = msgbuf_write(&ibuf->w);
436 if (n == -1 && errno != EAGAIN)
437 fatal("msgbuf_write");
439 /* Connection closed. */
446 const struct got_error *err = NULL;
448 if ((n = imsg_get(ibuf, &imsg)) == -1)
449 fatal("%s: imsg_get error", __func__);
450 if (n == 0) /* No more messages. */
453 switch (imsg.hdr.type) {
454 case GOTD_IMSG_CONNECT_SESSION:
455 err = recv_session(&imsg);
458 log_debug("unexpected imsg %d", imsg.hdr.type);
464 log_warnx("%s: %s", __func__, err->msg);
468 gotd_imsg_event_add(iev);
470 /* This pipe is dead. Remove its event handler */
472 event_loopexit(NULL);
478 notify_main(const char *title, struct gotd_repolist *repos,
479 const char *default_sender)
481 const struct got_error *err = NULL;
482 struct event evsigint, evsigterm, evsighup, evsigusr1;
484 arc4random_buf(&sessions_hash_key, sizeof(sessions_hash_key));
486 gotd_notify.title = title;
487 gotd_notify.repos = repos;
488 gotd_notify.default_sender = default_sender;
489 gotd_notify.pid = getpid();
491 signal_set(&evsigint, SIGINT, gotd_notify_sighdlr, NULL);
492 signal_set(&evsigterm, SIGTERM, gotd_notify_sighdlr, NULL);
493 signal_set(&evsighup, SIGHUP, gotd_notify_sighdlr, NULL);
494 signal_set(&evsigusr1, SIGUSR1, gotd_notify_sighdlr, NULL);
495 signal(SIGPIPE, SIG_IGN);
497 signal_add(&evsigint, NULL);
498 signal_add(&evsigterm, NULL);
499 signal_add(&evsighup, NULL);
500 signal_add(&evsigusr1, NULL);
502 imsg_init(&gotd_notify.parent_iev.ibuf, GOTD_FILENO_MSG_PIPE);
503 gotd_notify.parent_iev.handler = notify_dispatch;
504 gotd_notify.parent_iev.events = EV_READ;
505 gotd_notify.parent_iev.handler_arg = NULL;
506 event_set(&gotd_notify.parent_iev.ev, gotd_notify.parent_iev.ibuf.fd,
507 EV_READ, notify_dispatch, &gotd_notify.parent_iev);
508 gotd_imsg_event_add(&gotd_notify.parent_iev);
513 log_warnx("%s: %s", title, err->msg);
514 gotd_notify_shutdown();
518 gotd_notify_shutdown(void)
520 log_debug("%s: shutting down", gotd_notify.title);