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