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Date:: Tue Jul 13 15:26:32 2021 UTC
Message:: completing_read: take tab pointer instead of id
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1 #include <sys/socket.h>
2 
3 #include <errno.h>
4 #include <limits.h>
5 #include <signal.h>
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <unistd.h>
10 
11 #include "pages.h"
12 #include "parser.h"
13 #include "telescope.h"
14 #include "ui.h"
15 
16 static struct imsgev	*iev_fs, *iev_net;
17 
18 struct tabshead		 tabshead = TAILQ_HEAD_INITIALIZER(tabshead);
19 struct proxylist	 proxies = TAILQ_HEAD_INITIALIZER(proxies);
20 
21 enum telescope_process {
22 	PROC_UI,
23 	PROC_FS,
24 	PROC_NET,
25 };
26 
27 /* the first is also the fallback one */
28 static struct proto protos[] = {
29 	{ "gemini",	load_gemini_url },
30 	{ "about",	load_about_url },
31 	{ NULL, NULL },
32 };
33 
34 static void		 die(void) __attribute__((__noreturn__));
35 static struct tab	*tab_by_id(uint32_t);
36 static void		 handle_imsg_err(struct imsg*, size_t);
37 static void		 handle_imsg_check_cert(struct imsg*, size_t);
38 static void		 handle_check_cert_user_choice(int, struct tab *);
39 static void		 handle_maybe_save_new_cert(int, struct tab *);
40 static void		 handle_imsg_got_code(struct imsg*, size_t);
41 static void		 handle_imsg_got_meta(struct imsg*, size_t);
42 static void		 handle_maybe_save_page(int, struct tab *);
43 static void		 handle_save_page_path(const char *, struct tab *);
44 static void		 handle_imsg_file_opened(struct imsg*, size_t);
45 static void		 handle_imsg_buf(struct imsg*, size_t);
46 static void		 handle_imsg_eof(struct imsg*, size_t);
47 static void		 handle_imsg_bookmark_ok(struct imsg*, size_t);
48 static void		 handle_imsg_save_cert_ok(struct imsg*, size_t);
49 static void		 handle_imsg_update_cert_ok(struct imsg *, size_t);
50 static void		 handle_dispatch_imsg(int, short, void*);
51 static void		 load_page_from_str(struct tab*, const char*);
52 static void		 do_load_url(struct tab*, const char*);
53 static pid_t		 start_child(enum telescope_process, const char *, int);
54 static int		 ui_send_net(int, uint32_t, const void *, uint16_t);
55 static int		 ui_send_fs(int, uint32_t, const void *, uint16_t);
56 
57 static imsg_handlerfn *handlers[] = {
58 	[IMSG_ERR] = handle_imsg_err,
59 	[IMSG_CHECK_CERT] = handle_imsg_check_cert,
60 	[IMSG_GOT_CODE] = handle_imsg_got_code,
61 	[IMSG_GOT_META] = handle_imsg_got_meta,
62 	[IMSG_BUF] = handle_imsg_buf,
63 	[IMSG_EOF] = handle_imsg_eof,
64 	[IMSG_BOOKMARK_OK] = handle_imsg_bookmark_ok,
65 	[IMSG_SAVE_CERT_OK] = handle_imsg_save_cert_ok,
66 	[IMSG_UPDATE_CERT_OK] = handle_imsg_update_cert_ok,
67 	[IMSG_FILE_OPENED] = handle_imsg_file_opened,
68 };
69 
70 static struct ohash	certs;
71 
72 static void __attribute__((__noreturn__))
73 die(void)
74 {
75 	abort(); 		/* TODO */
76 }
77 
78 static struct tab *
79 tab_by_id(uint32_t id)
80 {
81 	struct tab *t;
82 
83 	TAILQ_FOREACH(t, &tabshead, tabs) {
84 		if (t->id == id)
85 			return t;
86 	}
87 
88 	die();
89 }
90 
91 static void
92 handle_imsg_err(struct imsg *imsg, size_t datalen)
93 {
94 	struct tab	*tab;
95 	char		*page;
96 
97 	tab = tab_by_id(imsg->hdr.peerid);
98 
99 	page = imsg->data;
100 	page[datalen-1] = '\0';
101 
102 	if (asprintf(&page, "# Error loading %s\n\n> %s\n",
103 	    tab->hist_cur->h, page) == -1)
104 		die();
105 	load_page_from_str(tab, page);
106 	free(page);
107 }
108 
109 static void
110 handle_imsg_check_cert(struct imsg *imsg, size_t datalen)
111 {
112 	const char		*hash, *host, *port;
113 	int			 tofu_res;
114 	struct tofu_entry	*e;
115 	struct tab		*tab;
116 
117 	hash = imsg->data;
118 	if (hash[datalen-1] != '\0')
119 		abort();
120 
121 	tab = tab_by_id(imsg->hdr.peerid);
122 
123 	if (tab->proxy != NULL) {
124 		host = tab->proxy->host;
125 		port = tab->proxy->port;
126 	} else {
127 		host = tab->uri.host;
128 		port = tab->uri.port;
129 	}
130 
131 	if ((e = tofu_lookup(&certs, host, port)) == NULL) {
132 		/* TODO: an update in libressl/libretls changed
133 		 * significantly.  Find a better approach at storing
134 		 * the certs! */
135 		if (datalen > sizeof(e->hash))
136 			abort();
137 
138 		tofu_res = 1;	/* trust on first use */
139 		if ((e = calloc(1, sizeof(*e))) == NULL)
140 			abort();
141 		strlcpy(e->domain, host, sizeof(e->domain));
142 		if (*port != '\0' && strcmp(port, "1965")) {
143 			strlcat(e->domain, ":", sizeof(e->domain));
144 			strlcat(e->domain, port, sizeof(e->domain));
145 		}
146 		strlcpy(e->hash, hash, sizeof(e->hash));
147 		tofu_add(&certs, e);
148 		ui_send_fs(IMSG_SAVE_CERT, tab->id, e, sizeof(*e));
149 	} else
150 		tofu_res = !strcmp(hash, e->hash);
151 
152 	if (tofu_res) {
153 		if (e->verified == -1)
154 			tab->trust = TS_TEMP_TRUSTED;
155 		else if (e->verified == 1)
156 			tab->trust = TS_VERIFIED;
157 		else
158 			tab->trust = TS_TRUSTED;
159 
160 		ui_send_net(IMSG_CERT_STATUS, imsg->hdr.peerid,
161 		    &tofu_res, sizeof(tofu_res));
162 	} else {
163 		tab->trust = TS_UNTRUSTED;
164 		load_page_from_str(tab, "# Certificate mismatch\n");
165 		if ((tab->cert = strdup(hash)) == NULL)
166 			die();
167 		ui_yornp("Certificate mismatch.  Proceed?",
168 		    handle_check_cert_user_choice, tab);
169 	}
170 }
171 
172 static void
173 handle_check_cert_user_choice(int accept, struct tab *tab)
174 {
175 	ui_send_net(IMSG_CERT_STATUS, tab->id, &accept,
176 	    sizeof(accept));
177 
178 	if (accept) {
179 		/*
180 		 * trust the certificate for this session only.  If
181 		 * the page results in a redirect while we're asking
182 		 * the user to save, we'll end up with an invalid
183 		 * tabid (one request == one tab id) and crash.  It
184 		 * also makes sense to save it for the current session
185 		 * if the user accepted it.
186 		 */
187 		tofu_temp_trust(&certs, tab->uri.host, tab->uri.port, tab->cert);
188 
189 		ui_yornp("Save the new certificate?",
190 		    handle_maybe_save_new_cert, tab);
191 	} else {
192 		free(tab->cert);
193 		tab->cert = NULL;
194 	}
195 }
196 
197 static void
198 handle_maybe_save_new_cert(int accept, struct tab *tab)
199 {
200 	struct tofu_entry *e;
201 	const char *host, *port;
202 
203 	if (tab->proxy != NULL) {
204 		host = tab->proxy->host;
205 		port = tab->proxy->port;
206 	} else {
207 		host = tab->uri.host;
208 		port = tab->uri.port;
209 	}
210 
211 	if (!accept)
212 		goto end;
213 
214 	if ((e = calloc(1, sizeof(*e))) == NULL)
215 		die();
216 
217 	strlcpy(e->domain, host, sizeof(e->domain));
218 	if (*port != '\0' && strcmp(port, "1965")) {
219 		strlcat(e->domain, ":", sizeof(e->domain));
220 		strlcat(e->domain, port, sizeof(e->domain));
221 	}
222 	strlcpy(e->hash, tab->cert, sizeof(e->hash));
223 	ui_send_fs(IMSG_UPDATE_CERT, 0, e, sizeof(*e));
224 
225 	tofu_update(&certs, e);
226 
227 	tab->trust = TS_TRUSTED;
228 
229 end:
230 	free(tab->cert);
231 	tab->cert = NULL;
232 }
233 
234 static inline int
235 normalize_code(int n)
236 {
237 	if (n < 20) {
238 		if (n == 10 || n == 11)
239 			return n;
240 		return 10;
241 	} else if (n < 30) {
242 		return 20;
243 	} else if (n < 40) {
244 		if (n == 30 || n == 31)
245 			return n;
246 		return 30;
247 	} else if (n < 50) {
248 		if (n <= 44)
249 			return n;
250 		return 40;
251 	} else if (n < 60) {
252 		if (n <= 53 || n == 59)
253 			return n;
254 		return 50;
255 	} else if (n < 70) {
256 		if (n <= 62)
257 			return n;
258 		return 60;
259 	} else
260 		return MALFORMED_RESPONSE;
261 }
262 
263 static void
264 handle_imsg_got_code(struct imsg *imsg, size_t datalen)
265 {
266 	struct tab	*tab;
267 
268 	tab = tab_by_id(imsg->hdr.peerid);
269 
270 	if (sizeof(tab->code) != datalen)
271 		die();
272 
273 	memcpy(&tab->code, imsg->data, sizeof(tab->code));
274 	tab->code = normalize_code(tab->code);
275 	if (tab->code != 30 && tab->code != 31)
276 		tab->redirect_count = 0;
277 }
278 
279 static void
280 handle_imsg_got_meta(struct imsg *imsg, size_t datalen)
281 {
282 	struct tab	*tab;
283 
284 	tab = tab_by_id(imsg->hdr.peerid);
285 
286 	if (sizeof(tab->meta) <= datalen)
287 		die();
288 
289 	memcpy(tab->meta, imsg->data, datalen);
290 
291 	if (tab->code < 10) {	/* internal errors */
292 		load_page_from_str(tab, err_pages[tab->code]);
293 	} else if (tab->code < 20) {	/* 1x */
294 		load_page_from_str(tab, err_pages[tab->code]);
295 		ui_require_input(tab, tab->code == 11);
296 	} else if (tab->code == 20) {
297 		if (setup_parser_for(tab)) {
298 			ui_send_net(IMSG_PROCEED, tab->id, NULL, 0);
299 		} else {
300 			load_page_from_str(tab, err_pages[UNKNOWN_TYPE_OR_CSET]);
301 			ui_yornp("Can't display page, wanna save?",
302 			    handle_maybe_save_page, tab);
303 		}
304 	} else if (tab->code < 40) { /* 3x */
305 		tab->redirect_count++;
306 
307 		/* TODO: make customizable? */
308 		if (tab->redirect_count > 5) {
309 			load_page_from_str(tab,
310 			    err_pages[TOO_MUCH_REDIRECTS]);
311 		} else
312 			do_load_url(tab, tab->meta);
313 	} else { /* 4x, 5x & 6x */
314 		load_page_from_str(tab, err_pages[tab->code]);
315 	}
316 }
317 
318 static void
319 handle_maybe_save_page(int dosave, struct tab *tab)
320 {
321 	if (dosave)
322 		ui_read("Save to path", handle_save_page_path, tab);
323 	else
324 		stop_tab(tab);
325 }
326 
327 static void
328 handle_save_page_path(const char *path, struct tab *tab)
329 {
330 	if (path == NULL) {
331 		stop_tab(tab);
332 		return;
333 	}
334 
335 	tab->path = strdup(path);
336 
337 	ui_send_fs(IMSG_FILE_OPEN, tab->id, path, strlen(path)+1);
338 }
339 
340 static void
341 handle_imsg_file_opened(struct imsg *imsg, size_t datalen)
342 {
343 	struct tab	*tab;
344 	char		*page;
345 	const char	*e;
346 	int		 l;
347 
348 	tab = tab_by_id(imsg->hdr.peerid);
349 
350 	if (imsg->fd == -1) {
351 		stop_tab(tab);
352 
353 		e = imsg->data;
354 		if (e[datalen-1] != '\0')
355 			die();
356 		l = asprintf(&page, "# Can't open file\n\n> %s: %s\n",
357 		    tab->path, e);
358 		if (l == -1)
359 			die();
360 		load_page_from_str(tab, page);
361 		free(page);
362 	} else {
363 		tab->fd = imsg->fd;
364 		ui_send_net(IMSG_PROCEED, tab->id, NULL, 0);
365 	}
366 }
367 
368 static void
369 handle_imsg_buf(struct imsg *imsg, size_t datalen)
370 {
371 	struct tab	*tab;
372 	int		 l;
373 	char		*page, buf[FMT_SCALED_STRSIZE] = {0};
374 
375 	tab = tab_by_id(imsg->hdr.peerid);
376 
377 	tab->bytes += datalen;
378 	if (tab->fd == -1) {
379 		if (!tab->buffer.page.parse(&tab->buffer.page,
380 		    imsg->data, datalen))
381 			die();
382 	} else {
383 		write(tab->fd, imsg->data, datalen);
384 		fmt_scaled(tab->bytes, buf);
385 		l = asprintf(&page, "Saving to \"%s\"... (%s)\n",
386 		    tab->path,
387 		    buf);
388 		if (l == -1)
389 			die();
390 		load_page_from_str(tab, page);
391 		free(page);
392 	}
393 
394 	ui_on_tab_refresh(tab);
395 }
396 
397 static void
398 handle_imsg_eof(struct imsg *imsg, size_t datalen)
399 {
400 	struct tab	*tab;
401 	int		 l;
402 	char		*page, buf[FMT_SCALED_STRSIZE] = {0};
403 
404 	tab = tab_by_id(imsg->hdr.peerid);
405 
406 	if (tab->fd == -1) {
407 		if (!tab->buffer.page.free(&tab->buffer.page))
408 			die();
409 	} else {
410 		fmt_scaled(tab->bytes, buf);
411 		l = asprintf(&page, "Saved to \"%s\" (%s)\n",
412 		    tab->path,
413 		    buf);
414 		if (l == -1)
415 			die();
416 		load_page_from_str(tab, page);
417 		free(page);
418 
419 		close(tab->fd);
420 		tab->fd = -1;
421 		free(tab->path);
422 		tab->path = NULL;
423 	}
424 
425 	ui_on_tab_refresh(tab);
426 	ui_on_tab_loaded(tab);
427 }
428 
429 static void
430 handle_imsg_bookmark_ok(struct imsg *imsg, size_t datalen)
431 {
432 	int res;
433 
434 	if (datalen != sizeof(res))
435 		die();
436 
437 	memcpy(&res, imsg->data, sizeof(res));
438 	if (res == 0)
439 		message("Added to bookmarks!");
440 	else
441 		message("Failed to add to bookmarks: %s",
442 		    strerror(res));
443 }
444 
445 static void
446 handle_imsg_save_cert_ok(struct imsg *imsg, size_t datalen)
447 {
448 	int res;
449 
450 	if (datalen != sizeof(res))
451 		die();
452 	memcpy(&res, imsg->data, datalen);
453 	if (res != 0)
454 		message("Failed to save the cert for: %s",
455 		    strerror(res));
456 }
457 
458 static void
459 handle_imsg_update_cert_ok(struct imsg *imsg, size_t datalen)
460 {
461 	int res;
462 
463 	if (datalen != sizeof(res))
464 		die();
465 	memcpy(&res, imsg->data, datalen);
466 	if (!res)
467 		message("Failed to update the certificate");
468 }
469 
470 static void
471 handle_dispatch_imsg(int fd, short ev, void *d)
472 {
473 	struct imsgev	*iev = d;
474 	dispatch_imsg(iev, ev, handlers, sizeof(handlers));
475 }
476 
477 static void
478 load_page_from_str(struct tab *tab, const char *page)
479 {
480 	erase_buffer(&tab->buffer);
481 	gemtext_initparser(&tab->buffer.page);
482 	if (!tab->buffer.page.parse(&tab->buffer.page, page, strlen(page)))
483 		die();
484 	if (!tab->buffer.page.free(&tab->buffer.page))
485 		die();
486 	ui_on_tab_refresh(tab);
487 	ui_on_tab_loaded(tab);
488 }
489 
490 void
491 load_about_url(struct tab *tab, const char *url)
492 {
493 	tab->trust = TS_VERIFIED;
494 
495 	gemtext_initparser(&tab->buffer.page);
496 
497 	ui_send_fs(IMSG_GET, tab->id,
498 	    tab->hist_cur->h, strlen(tab->hist_cur->h)+1);
499 }
500 
501 void
502 load_gemini_url(struct tab *tab, const char *url)
503 {
504 	struct get_req	 req;
505 
506 	stop_tab(tab);
507 	tab->id = tab_new_id();
508 
509 	memset(&req, 0, sizeof(req));
510 	strlcpy(req.host, tab->uri.host, sizeof(req.host));
511 	strlcpy(req.port, tab->uri.port, sizeof(req.host));
512 
513 	strlcpy(req.req, tab->hist_cur->h, sizeof(req.req));
514 	strlcat(req.req, "\r\n", sizeof(req.req));
515 
516 	req.proto = PROTO_GEMINI;
517 
518 	ui_send_net(IMSG_GET_RAW, tab->id,
519 	    &req, sizeof(req));
520 }
521 
522 void
523 load_via_proxy(struct tab *tab, const char *url, struct proxy *p)
524 {
525 	struct get_req req;
526 
527 	stop_tab(tab);
528 	tab->id = tab_new_id();
529 	tab->proxy = p;
530 
531 	memset(&req, 0, sizeof(req));
532 	strlcpy(req.host, p->host, sizeof(req.host));
533 	strlcpy(req.port, p->port, sizeof(req.host));
534 
535 	strlcpy(req.req, tab->hist_cur->h, sizeof(req.req));
536 	strlcat(req.req, "\r\n", sizeof(req.req));
537 
538 	req.proto = p->proto;
539 
540 	ui_send_net(IMSG_GET_RAW, tab->id,
541 	    &req, sizeof(req));
542 }
543 
544 static void
545 do_load_url(struct tab *tab, const char *url)
546 {
547 	struct phos_uri	 uri;
548 	struct proto	*p;
549 	struct proxy	*proxy;
550 	char		*t;
551 
552 	tab->proxy = NULL;
553 
554 	if (tab->fd != -1) {
555 		close(tab->fd);
556 		tab->fd = -1;
557 		free(tab->path);
558 		tab->path = NULL;
559 	}
560 
561 	tab->trust = TS_UNKNOWN;
562 
563 	memcpy(&uri, &tab->uri, sizeof(tab->uri));
564 	if (!phos_resolve_uri_from_str(&uri, url, &tab->uri)) {
565                 if (asprintf(&t, "#error loading %s\n>%s\n",
566 		    url, "Can't parse the URI") == -1)
567 			die();
568 		strlcpy(tab->hist_cur->h, url, sizeof(tab->hist_cur->h));
569 		load_page_from_str(tab, t);
570 		free(t);
571 		return;
572 	}
573 
574 	phos_serialize_uri(&tab->uri, tab->hist_cur->h,
575 	    sizeof(tab->hist_cur->h));
576 
577 	for (p = protos; p->schema != NULL; ++p) {
578 		if (!strcmp(tab->uri.scheme, p->schema)) {
579 			p->loadfn(tab, url);
580                         return;
581 		}
582 	}
583 
584 	TAILQ_FOREACH(proxy, &proxies, proxies) {
585 		if (!strcmp(tab->uri.scheme, proxy->match_proto)) {
586 			load_via_proxy(tab, url, proxy);
587 			return;
588 		}
589 	}
590 
591 	protos[0].loadfn(tab, url);
592 }
593 
594 void
595 load_url(struct tab *tab, const char *url)
596 {
597 	if (tab->hist_cur != NULL)
598 		hist_clear_forward(&tab->hist, TAILQ_NEXT(tab->hist_cur, entries));
599 
600 	if ((tab->hist_cur = calloc(1, sizeof(*tab->hist_cur))) == NULL) {
601 		event_loopbreak();
602 		return;
603 	}
604 
605 	hist_push(&tab->hist, tab->hist_cur);
606 	do_load_url(tab, url);
607 	erase_buffer(&tab->buffer);
608 }
609 
610 int
611 load_previous_page(struct tab *tab)
612 {
613 	struct hist	*h;
614 
615 	if ((h = TAILQ_PREV(tab->hist_cur, mhisthead, entries)) == NULL)
616 		return 0;
617 	tab->hist_cur = h;
618 	do_load_url(tab, h->h);
619 	return 1;
620 }
621 
622 int
623 load_next_page(struct tab *tab)
624 {
625 	struct hist	*h;
626 
627 	if ((h = TAILQ_NEXT(tab->hist_cur, entries)) == NULL)
628 		return 0;
629 	tab->hist_cur = h;
630 	do_load_url(tab, h->h);
631 	return 1;
632 }
633 
634 void
635 stop_tab(struct tab *tab)
636 {
637 	ui_send_net(IMSG_STOP, tab->id, NULL, 0);
638 
639 	if (tab->fd != -1) {
640 		close(tab->fd);
641 		tab->fd = -1;
642 		free(tab->path);
643 		tab->path = NULL;
644 		load_page_from_str(tab, "Stopped.\n");
645 	}
646 }
647 
648 void
649 add_to_bookmarks(const char *str)
650 {
651 	ui_send_fs(IMSG_BOOKMARK_PAGE, 0,
652 	    str, strlen(str)+1);
653 }
654 
655 void
656 save_session(void)
657 {
658 	struct tab *tab;
659 
660 	ui_send_fs(IMSG_SESSION_START, 0, NULL, 0);
661 
662 	TAILQ_FOREACH(tab, &tabshead, tabs) {
663 		ui_send_fs(IMSG_SESSION_TAB, 0,
664 		    tab->hist_cur->h, strlen(tab->hist_cur->h)+1);
665 	}
666 
667 	ui_send_fs(IMSG_SESSION_END, 0, NULL, 0);
668 }
669 
670 static void
671 session_new_tab_cb(const char *url)
672 {
673 	new_tab(url);
674 }
675 
676 static pid_t
677 start_child(enum telescope_process p, const char *argv0, int fd)
678 {
679 	const char	*argv[4];
680 	int		 argc = 0;
681 	pid_t		 pid;
682 
683 	switch (pid = fork()) {
684 	case -1:
685 		die();
686 	case 0:
687 		break;
688 	default:
689 		close(fd);
690 		return pid;
691 	}
692 
693 	if (dup2(fd, 3) == -1)
694 		err(1, "cannot setup imsg fd");
695 
696 	argv[argc++] = argv0;
697 	switch (p) {
698 	case PROC_UI:
699 		errx(1, "Can't start ui process");
700 	case PROC_FS:
701 		argv[argc++] = "-Tf";
702 		break;
703 	case PROC_NET:
704 		argv[argc++] = "-Tn";
705 		break;
706 	}
707 
708 	argv[argc++] = NULL;
709 	execvp(argv0, (char *const *)argv);
710 	err(1, "execvp(%s)", argv0);
711 }
712 
713 static int
714 ui_send_net(int type, uint32_t peerid, const void *data,
715     uint16_t datalen)
716 {
717 	return imsg_compose_event(iev_net, type, peerid, 0, -1, data,
718 	    datalen);
719 }
720 
721 static int
722 ui_send_fs(int type, uint32_t peerid, const void *data, uint16_t datalen)
723 {
724 	return imsg_compose_event(iev_fs, type, peerid, 0, -1, data,
725 	    datalen);
726 }
727 
728 static void __attribute__((noreturn))
729 usage(int r)
730 {
731 	fprintf(stderr, "USAGE: %s [-hn] [-c config] [url]\n", getprogname());
732 	fprintf(stderr, "version: " PACKAGE " " VERSION "\n");
733 	exit(r);
734 }
735 
736 int
737 main(int argc, char * const *argv)
738 {
739 	struct imsgev	 net_ibuf, fs_ibuf;
740 	int		 pipe2net[2], pipe2fs[2];
741 	int		 ch, configtest = 0, fail = 0;
742 	int		 has_url = 0;
743 	int		 proc = -1;
744 	char		 path[PATH_MAX];
745 	const char	*url = NEW_TAB_URL;
746 	const char	*argv0;
747 
748 	argv0 = argv[0];
749 
750 	signal(SIGCHLD, SIG_IGN);
751 	signal(SIGPIPE, SIG_IGN);
752 
753 	if (getenv("NO_COLOR") != NULL)
754 		enable_colors = 0;
755 
756 	strlcpy(path, getenv("HOME"), sizeof(path));
757 	strlcat(path, "/.telescope/config", sizeof(path));
758 
759 	while ((ch = getopt(argc, argv, "c:hnT:")) != -1) {
760 		switch (ch) {
761 		case 'c':
762 			fail = 1;
763 			strlcpy(path, optarg, sizeof(path));
764 			break;
765 		case 'n':
766 			configtest = 1;
767 			break;
768 		case 'h':
769 			usage(0);
770 		case 'T':
771 			switch (*optarg) {
772 			case 'f':
773 				proc = PROC_FS;
774 				break;
775 			case 'n':
776 				proc = PROC_NET;
777 				break;
778 			default:
779 				errx(1, "invalid process spec %c",
780 				    *optarg);
781 			}
782 			break;
783 		default:
784 			usage(1);
785 		}
786 	}
787 
788 	argc -= optind;
789 	argv += optind;
790 
791 	if (proc != -1) {
792 		if (argc > 0)
793 			usage(1);
794 		else if (proc == PROC_FS)
795 			return fs_main();
796 		else if (proc == PROC_NET)
797 			return client_main();
798 		else
799 			usage(1);
800 	}
801 
802 	if (argc != 0) {
803 		has_url = 1;
804 		url = argv[0];
805 	}
806 
807 	/* setup keys before reading the config */
808 	TAILQ_INIT(&global_map.m);
809 	global_map.unhandled_input = global_key_unbound;
810 	TAILQ_INIT(&minibuffer_map.m);
811 
812 	config_init();
813 	parseconfig(path, fail);
814 	if (configtest){
815 		puts("config OK");
816 		exit(0);
817 	}
818 
819 	/* Start children. */
820 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe2fs) == -1)
821 		err(1, "socketpair");
822 	start_child(PROC_FS, argv0, pipe2fs[1]);
823 	imsg_init(&fs_ibuf.ibuf, pipe2fs[0]);
824 	iev_fs = &fs_ibuf;
825 	iev_fs->handler = handle_dispatch_imsg;
826 
827 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe2net) == -1)
828 		err(1, "socketpair");
829 	start_child(PROC_NET, argv0, pipe2net[1]);
830 	imsg_init(&net_ibuf.ibuf, pipe2net[0]);
831 	iev_net = &net_ibuf;
832 	iev_net->handler = handle_dispatch_imsg;
833 
834 	setproctitle("ui");
835 
836 	/* initialize tofu & load certificates */
837 	fs_init();
838 	tofu_init(&certs, 5, offsetof(struct tofu_entry, domain));
839 	load_certs(&certs);
840 
841 	event_init();
842 
843 	/* Setup event handlers for pipes to fs/net */
844 	iev_fs->events = EV_READ;
845 	event_set(&iev_fs->ev, iev_fs->ibuf.fd, iev_fs->events,
846 	    iev_fs->handler, iev_fs);
847 	event_add(&iev_fs->ev, NULL);
848 
849 	iev_net->events = EV_READ;
850 	event_set(&iev_net->ev, iev_net->ibuf.fd, iev_net->events,
851 	    iev_net->handler, iev_net);
852 	event_add(&iev_net->ev, NULL);
853 
854 	if (ui_init()) {
855 		load_last_session(session_new_tab_cb);
856 		if (has_url || TAILQ_EMPTY(&tabshead))
857 			new_tab(url);
858 
859 		sandbox_ui_process();
860 		event_dispatch();
861 		ui_end();
862 	}
863 
864 	ui_send_fs(IMSG_QUIT, 0, NULL, 0);
865 	ui_send_net(IMSG_QUIT, 0, NULL, 0);
866 	imsg_flush(&iev_fs->ibuf);
867 
868 	return 0;
869 }