2 35e1f40a 2021-03-14 op * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
4 35e1f40a 2021-03-14 op * Permission to use, copy, modify, and distribute this software for any
5 35e1f40a 2021-03-14 op * purpose with or without fee is hereby granted, provided that the above
6 35e1f40a 2021-03-14 op * copyright notice and this permission notice appear in all copies.
8 35e1f40a 2021-03-14 op * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 35e1f40a 2021-03-14 op * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 35e1f40a 2021-03-14 op * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 35e1f40a 2021-03-14 op * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 35e1f40a 2021-03-14 op * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 35e1f40a 2021-03-14 op * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 35e1f40a 2021-03-14 op * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 740f578b 2021-03-15 op * Handles the data in ~/.telescope
20 3a227e9a 2021-03-18 op * TODO: add some form of locking on the files
23 6cd6a9e1 2021-03-20 op #include <sys/stat.h>
25 35e1f40a 2021-03-14 op #include <errno.h>
26 de2a69bb 2021-05-17 op #include <fcntl.h>
27 35e1f40a 2021-03-14 op #include <limits.h>
28 35e1f40a 2021-03-14 op #include <stdio.h>
29 35e1f40a 2021-03-14 op #include <stdlib.h>
30 35e1f40a 2021-03-14 op #include <string.h>
31 35e1f40a 2021-03-14 op #include <unistd.h>
33 4913b479 2021-07-12 op #include "telescope.h"
34 5a824be4 2021-07-13 op #include "pages.h"
36 35e1f40a 2021-03-14 op static void die(void) __attribute__((__noreturn__));
37 35e1f40a 2021-03-14 op static void handle_get(struct imsg*, size_t);
38 35e1f40a 2021-03-14 op static void handle_quit(struct imsg*, size_t);
39 740f578b 2021-03-15 op static void handle_bookmark_page(struct imsg*, size_t);
40 3a227e9a 2021-03-18 op static void handle_save_cert(struct imsg*, size_t);
41 288fd238 2021-04-25 op static void handle_update_cert(struct imsg*, size_t);
42 de2a69bb 2021-05-17 op static void handle_file_open(struct imsg*, size_t);
43 c7107cec 2021-04-01 op static void handle_session_start(struct imsg*, size_t);
44 c7107cec 2021-04-01 op static void handle_session_tab(struct imsg*, size_t);
45 2f524b17 2021-07-17 op static void handle_session_tab_title(struct imsg*, size_t);
46 c7107cec 2021-04-01 op static void handle_session_end(struct imsg*, size_t);
47 1304bbdd 2021-03-15 op static void handle_dispatch_imsg(int, short, void*);
48 bc10f6a5 2021-07-12 op static int fs_send_ui(int, uint32_t, int, const void *, uint16_t);
50 bc10f6a5 2021-07-12 op static struct imsgev *iev_ui;
51 c7107cec 2021-04-01 op static FILE *session;
53 56e7efb4 2021-07-21 op static char base_path[PATH_MAX];
54 d0fd368a 2021-07-15 op static char lockfile_path[PATH_MAX];
55 740f578b 2021-03-15 op static char bookmark_file[PATH_MAX];
56 288fd238 2021-04-25 op static char known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
57 ea080950 2021-07-20 op static char crashed_file[PATH_MAX];
59 87e3e801 2021-07-17 op char session_file[PATH_MAX];
61 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
62 35e1f40a 2021-03-14 op [IMSG_GET] = handle_get,
63 35e1f40a 2021-03-14 op [IMSG_QUIT] = handle_quit,
64 740f578b 2021-03-15 op [IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
65 3a227e9a 2021-03-18 op [IMSG_SAVE_CERT] = handle_save_cert,
66 288fd238 2021-04-25 op [IMSG_UPDATE_CERT] = handle_update_cert,
67 de2a69bb 2021-05-17 op [IMSG_FILE_OPEN] = handle_file_open,
68 c7107cec 2021-04-01 op [IMSG_SESSION_START] = handle_session_start,
69 c7107cec 2021-04-01 op [IMSG_SESSION_TAB] = handle_session_tab,
70 2f524b17 2021-07-17 op [IMSG_SESSION_TAB_TITLE] = handle_session_tab_title,
71 c7107cec 2021-04-01 op [IMSG_SESSION_END] = handle_session_end,
74 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
77 35e1f40a 2021-03-14 op abort(); /* TODO */
81 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
83 56e7efb4 2021-07-21 op const char *bpath = "bookmarks.gmi";
84 56e7efb4 2021-07-21 op char path[PATH_MAX], buf[BUFSIZ];
86 a2728733 2021-07-18 op const char *data, *p;
90 a2728733 2021-07-18 op const char *name;
91 56e7efb4 2021-07-21 op const char *path;
92 a2728733 2021-07-18 op const uint8_t *data;
95 56e7efb4 2021-07-21 op {"about", NULL, about_about, about_about_len},
96 56e7efb4 2021-07-21 op {"blank", NULL, about_blank, about_blank_len},
97 56e7efb4 2021-07-21 op {"bookmarks", bpath, bookmarks, bookmarks_len},
98 56e7efb4 2021-07-21 op {"crash", NULL, about_crash, about_crash_len},
99 56e7efb4 2021-07-21 op {"help", NULL, about_help, about_help_len},
100 56e7efb4 2021-07-21 op {"license", NULL, about_license, about_license_len},
101 56e7efb4 2021-07-21 op {"new", NULL, about_new, about_new_len},
102 56e7efb4 2021-07-21 op }, *page = NULL;
104 35e1f40a 2021-03-14 op data = imsg->data;
105 56e7efb4 2021-07-21 op if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
107 56e7efb4 2021-07-21 op if ((data = strchr(data, ':')) == NULL)
108 56e7efb4 2021-07-21 op goto notfound;
111 56e7efb4 2021-07-21 op for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
112 56e7efb4 2021-07-21 op if (!strcmp(data, pages[i].name)) {
113 56e7efb4 2021-07-21 op page = &pages[i];
117 56e7efb4 2021-07-21 op if (page == NULL)
118 56e7efb4 2021-07-21 op goto notfound;
120 56e7efb4 2021-07-21 op strlcpy(path, base_path, sizeof(path));
121 56e7efb4 2021-07-21 op strlcat(path, "/", sizeof(path));
122 56e7efb4 2021-07-21 op if (page->path != NULL)
123 56e7efb4 2021-07-21 op strlcat(path, page->path, sizeof(path));
125 56e7efb4 2021-07-21 op strlcat(path, "pages/about_", sizeof(path));
126 56e7efb4 2021-07-21 op strlcat(path, page->name, sizeof(path));
127 56e7efb4 2021-07-21 op strlcat(path, ".gmi", sizeof(path));
130 56e7efb4 2021-07-21 op if ((f = fopen(path, "r")) == NULL) {
131 56e7efb4 2021-07-21 op fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
132 56e7efb4 2021-07-21 op page->data, page->len);
133 56e7efb4 2021-07-21 op fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
139 56e7efb4 2021-07-21 op r = fread(buf, 1, sizeof(buf), f);
140 56e7efb4 2021-07-21 op fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, buf, r);
141 56e7efb4 2021-07-21 op if (r != sizeof(buf))
144 56e7efb4 2021-07-21 op fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
149 a2728733 2021-07-18 op p = "# not found!\n";
150 a2728733 2021-07-18 op fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
151 a2728733 2021-07-18 op fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
155 35e1f40a 2021-03-14 op handle_quit(struct imsg *imsg, size_t datalen)
157 35e1f40a 2021-03-14 op event_loopbreak();
161 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
167 740f578b 2021-03-15 op data = imsg->data;
168 740f578b 2021-03-15 op if (data[datalen-1] != '\0')
171 740f578b 2021-03-15 op if ((f = fopen(bookmark_file, "a")) == NULL) {
175 740f578b 2021-03-15 op fprintf(f, "=> %s\n", data);
180 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
184 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
186 3a227e9a 2021-03-18 op struct tofu_entry e;
190 3a227e9a 2021-03-18 op /* TODO: traverse the file to avoid duplications? */
192 3a227e9a 2021-03-18 op if (datalen != sizeof(e))
194 3a227e9a 2021-03-18 op memcpy(&e, imsg->data, datalen);
196 3a227e9a 2021-03-18 op if ((f = fopen(known_hosts_file, "a")) == NULL) {
200 3a227e9a 2021-03-18 op fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
205 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
206 288fd238 2021-04-25 op &res, sizeof(res));
210 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
212 288fd238 2021-04-25 op FILE *tmp, *f;
213 288fd238 2021-04-25 op struct tofu_entry entry;
214 288fd238 2021-04-25 op char sfn[PATH_MAX], *line = NULL, *t;
215 288fd238 2021-04-25 op size_t l, linesize = 0;
216 288fd238 2021-04-25 op ssize_t linelen;
217 288fd238 2021-04-25 op int fd, e, res = 0;
219 288fd238 2021-04-25 op if (datalen != sizeof(entry))
221 288fd238 2021-04-25 op memcpy(&entry, imsg->data, datalen);
223 288fd238 2021-04-25 op strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
224 288fd238 2021-04-25 op if ((fd = mkstemp(sfn)) == -1 ||
225 288fd238 2021-04-25 op (tmp = fdopen(fd, "w")) == NULL) {
226 288fd238 2021-04-25 op if (fd != -1) {
234 288fd238 2021-04-25 op if ((f = fopen(known_hosts_file, "r")) == NULL) {
241 288fd238 2021-04-25 op l = strlen(entry.domain);
242 288fd238 2021-04-25 op while ((linelen = getline(&line, &linesize, f)) != -1) {
243 288fd238 2021-04-25 op if ((t = strstr(line, entry.domain)) != NULL &&
244 288fd238 2021-04-25 op (line[l] == ' ' || line[l] == '\t'))
246 288fd238 2021-04-25 op /* line has a trailing \n */
247 288fd238 2021-04-25 op fprintf(tmp, "%s", line);
249 288fd238 2021-04-25 op fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
252 288fd238 2021-04-25 op e = ferror(tmp);
263 288fd238 2021-04-25 op res = rename(sfn, known_hosts_file) != -1;
266 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
267 3a227e9a 2021-03-18 op &res, sizeof(res));
271 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
273 de2a69bb 2021-05-17 op char *path, *e;
276 de2a69bb 2021-05-17 op path = imsg->data;
277 de2a69bb 2021-05-17 op if (path[datalen-1] != '\0')
280 de2a69bb 2021-05-17 op if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
281 de2a69bb 2021-05-17 op e = strerror(errno);
282 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
283 de2a69bb 2021-05-17 op e, strlen(e)+1);
285 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
290 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
292 c7107cec 2021-04-01 op if (datalen != 0)
295 c7107cec 2021-04-01 op if ((session = fopen(session_file, "w")) == NULL)
300 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
303 87e3e801 2021-07-17 op uint32_t flags;
305 c7107cec 2021-04-01 op if (session == NULL)
308 87e3e801 2021-07-17 op flags = imsg->hdr.peerid;
309 58df4f47 2021-07-17 op url = imsg->data;
310 58df4f47 2021-07-17 op if (datalen == 0 || url[datalen-1] != '\0')
312 58df4f47 2021-07-17 op fprintf(session, "%s", url);
314 87e3e801 2021-07-17 op if (flags & TAB_CURRENT)
315 2f524b17 2021-07-17 op fprintf(session, " current ");
317 2f524b17 2021-07-17 op fprintf(session, " - ");
321 2f524b17 2021-07-17 op handle_session_tab_title(struct imsg *imsg, size_t datalen)
323 2f524b17 2021-07-17 op const char *title;
325 2f524b17 2021-07-17 op title = imsg->data;
326 2f524b17 2021-07-17 op if (title == NULL) {
331 2f524b17 2021-07-17 op if (title[datalen-1] != '\0')
334 2f524b17 2021-07-17 op fprintf(session, "%s\n", title);
338 c7107cec 2021-04-01 op handle_session_end(struct imsg *imsg, size_t datalen)
340 c7107cec 2021-04-01 op if (session == NULL)
342 c7107cec 2021-04-01 op fclose(session);
343 c7107cec 2021-04-01 op session = NULL;
347 1304bbdd 2021-03-15 op handle_dispatch_imsg(int fd, short ev, void *d)
349 bc10f6a5 2021-07-12 op struct imsgev *iev = d;
352 ea080950 2021-07-20 op if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
354 ea080950 2021-07-20 op * This should leave a ~/.telescope/crashed file to
355 ea080950 2021-07-20 op * trigger about:crash on next run. Unfortunately, if
356 ea080950 2021-07-20 op * the main process dies the fs sticks around and
357 ea080950 2021-07-20 op * doesn't notice that the fd was closed. Why EV_READ
358 ea080950 2021-07-20 op * is not triggered when a fd is closed on the other end?
361 ea080950 2021-07-20 op if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
363 ea080950 2021-07-20 op err(1, "open");
365 ea080950 2021-07-20 op errx(1, "connection closed: %s", strerror(e));
370 bc10f6a5 2021-07-12 op fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
371 bc10f6a5 2021-07-12 op uint16_t datalen)
373 bc10f6a5 2021-07-12 op return imsg_compose_event(iev_ui, type, peerid, 0, fd,
374 bc10f6a5 2021-07-12 op data, datalen);
378 3a227e9a 2021-03-18 op fs_init(void)
380 56e7efb4 2021-07-21 op strlcpy(base_path, getenv("HOME"), sizeof(base_path));
381 56e7efb4 2021-07-21 op strlcat(base_path, "/.telescope", sizeof(base_path));
382 56e7efb4 2021-07-21 op mkdir(base_path, 0700);
384 56e7efb4 2021-07-21 op strlcpy(lockfile_path, base_path, sizeof(lockfile_path));
385 56e7efb4 2021-07-21 op strlcat(lockfile_path, "/lock", sizeof(lockfile_path));
387 56e7efb4 2021-07-21 op strlcpy(bookmark_file, base_path, sizeof(bookmark_file));
388 56e7efb4 2021-07-21 op strlcat(bookmark_file, "/bookmarks.gmi", sizeof(bookmark_file));
390 56e7efb4 2021-07-21 op strlcpy(known_hosts_file, base_path, sizeof(known_hosts_file));
391 56e7efb4 2021-07-21 op strlcat(known_hosts_file, "/known_hosts", sizeof(known_hosts_file));
393 56e7efb4 2021-07-21 op strlcpy(known_hosts_tmp, base_path, sizeof(known_hosts_tmp));
394 56e7efb4 2021-07-21 op strlcat(known_hosts_tmp, "/known_hosts.tmp.XXXXXXXXXX",
395 288fd238 2021-04-25 op sizeof(known_hosts_file));
397 56e7efb4 2021-07-21 op strlcpy(session_file, base_path, sizeof(session_file));
398 56e7efb4 2021-07-21 op strlcat(session_file, "/session", sizeof(session_file));
400 56e7efb4 2021-07-21 op strlcpy(crashed_file, base_path, sizeof(crashed_file));
401 56e7efb4 2021-07-21 op strlcat(crashed_file, "/crashed", sizeof(crashed_file));
407 6cc5fcfe 2021-07-08 op fs_main(void)
409 6cc5fcfe 2021-07-08 op setproctitle("fs");
413 35e1f40a 2021-03-14 op event_init();
415 bc10f6a5 2021-07-12 op /* Setup pipe and event handler to the main process */
416 bc10f6a5 2021-07-12 op if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
418 bc10f6a5 2021-07-12 op imsg_init(&iev_ui->ibuf, 3);
419 bc10f6a5 2021-07-12 op iev_ui->handler = handle_dispatch_imsg;
420 bc10f6a5 2021-07-12 op iev_ui->events = EV_READ;
421 bc10f6a5 2021-07-12 op event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
422 bc10f6a5 2021-07-12 op iev_ui->handler, iev_ui);
423 bc10f6a5 2021-07-12 op event_add(&iev_ui->ev, NULL);
425 35e1f40a 2021-03-14 op sandbox_fs_process();
427 35e1f40a 2021-03-14 op event_dispatch();
434 b6171794 2021-07-20 op last_time_crashed(void)
438 b6171794 2021-07-20 op if ((fd = open(crashed_file, O_RDONLY)) == -1)
442 b6171794 2021-07-20 op unlink(crashed_file);
447 d0fd368a 2021-07-15 op lock_session(void)
449 d0fd368a 2021-07-15 op struct flock lock;
452 d0fd368a 2021-07-15 op if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
455 d0fd368a 2021-07-15 op lock.l_start = 0;
456 d0fd368a 2021-07-15 op lock.l_len = 0;
457 d0fd368a 2021-07-15 op lock.l_type = F_WRLCK;
458 d0fd368a 2021-07-15 op lock.l_whence = SEEK_SET;
460 d0fd368a 2021-07-15 op if (fcntl(fd, F_SETLK, &lock) == -1) {
469 c6d03cf5 2021-04-25 op parse_khost_line(char *line, char *tmp[3])
473 c6d03cf5 2021-04-25 op for (ap = tmp; ap < &tmp[3] &&
474 c6d03cf5 2021-04-25 op (*ap = strsep(&line, " \t\n")) != NULL;) {
475 c6d03cf5 2021-04-25 op if (**ap != '\0')
479 c6d03cf5 2021-04-25 op return ap == &tmp[3] && *line == '\0';
483 3a227e9a 2021-03-18 op load_certs(struct ohash *h)
485 c6d03cf5 2021-04-25 op char *tmp[3], *line = NULL;
486 6cd6a9e1 2021-03-20 op const char *errstr;
487 ec1fa0b0 2021-04-25 op size_t lineno = 0, linesize = 0;
488 3a227e9a 2021-03-18 op ssize_t linelen;
490 3a227e9a 2021-03-18 op struct tofu_entry *e;
492 3a227e9a 2021-03-18 op if ((f = fopen(known_hosts_file, "r")) == NULL)
495 3a227e9a 2021-03-18 op while ((linelen = getline(&line, &linesize, f)) != -1) {
496 3a227e9a 2021-03-18 op if ((e = calloc(1, sizeof(*e))) == NULL)
501 c6d03cf5 2021-04-25 op if (parse_khost_line(line, tmp)) {
502 c6d03cf5 2021-04-25 op strlcpy(e->domain, tmp[0], sizeof(e->domain));
503 c6d03cf5 2021-04-25 op strlcpy(e->hash, tmp[1], sizeof(e->hash));
505 c6d03cf5 2021-04-25 op e->verified = strtonum(tmp[2], 0, 1, &errstr);
506 c6d03cf5 2021-04-25 op if (errstr != NULL)
507 c6d03cf5 2021-04-25 op errx(1, "%s:%zu verification for %s is %s: %s",
508 c6d03cf5 2021-04-25 op known_hosts_file, lineno,
509 c6d03cf5 2021-04-25 op e->domain, errstr, tmp[2]);
510 c6d03cf5 2021-04-25 op tofu_add(h, e);
512 ec1fa0b0 2021-04-25 op warnx("%s:%zu invalid entry",
513 ec1fa0b0 2021-04-25 op known_hosts_file, lineno);
519 3a227e9a 2021-03-18 op return ferror(f);
