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 786e6deb 2021-07-21 op #include "compat.h"
25 6cd6a9e1 2021-03-20 op #include <sys/stat.h>
27 35e1f40a 2021-03-14 op #include <errno.h>
28 de2a69bb 2021-05-17 op #include <fcntl.h>
29 35e1f40a 2021-03-14 op #include <limits.h>
30 35e1f40a 2021-03-14 op #include <stdio.h>
31 35e1f40a 2021-03-14 op #include <stdlib.h>
32 35e1f40a 2021-03-14 op #include <string.h>
33 35e1f40a 2021-03-14 op #include <unistd.h>
35 4913b479 2021-07-12 op #include "telescope.h"
36 5a824be4 2021-07-13 op #include "pages.h"
38 35e1f40a 2021-03-14 op static void die(void) __attribute__((__noreturn__));
39 35e1f40a 2021-03-14 op static void handle_get(struct imsg*, size_t);
40 35e1f40a 2021-03-14 op static void handle_quit(struct imsg*, size_t);
41 740f578b 2021-03-15 op static void handle_bookmark_page(struct imsg*, size_t);
42 3a227e9a 2021-03-18 op static void handle_save_cert(struct imsg*, size_t);
43 288fd238 2021-04-25 op static void handle_update_cert(struct imsg*, size_t);
44 de2a69bb 2021-05-17 op static void handle_file_open(struct imsg*, size_t);
45 c7107cec 2021-04-01 op static void handle_session_start(struct imsg*, size_t);
46 c7107cec 2021-04-01 op static void handle_session_tab(struct imsg*, size_t);
47 2f524b17 2021-07-17 op static void handle_session_tab_title(struct imsg*, size_t);
48 c7107cec 2021-04-01 op static void handle_session_end(struct imsg*, size_t);
49 1304bbdd 2021-03-15 op static void handle_dispatch_imsg(int, short, void*);
50 bc10f6a5 2021-07-12 op static int fs_send_ui(int, uint32_t, int, const void *, uint16_t);
52 bc10f6a5 2021-07-12 op static struct imsgev *iev_ui;
53 c7107cec 2021-04-01 op static FILE *session;
55 56e7efb4 2021-07-21 op static char base_path[PATH_MAX];
56 d0fd368a 2021-07-15 op static char lockfile_path[PATH_MAX];
57 740f578b 2021-03-15 op static char bookmark_file[PATH_MAX];
58 288fd238 2021-04-25 op static char known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
59 ea080950 2021-07-20 op static char crashed_file[PATH_MAX];
61 87e3e801 2021-07-17 op char session_file[PATH_MAX];
63 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
64 35e1f40a 2021-03-14 op [IMSG_GET] = handle_get,
65 35e1f40a 2021-03-14 op [IMSG_QUIT] = handle_quit,
66 740f578b 2021-03-15 op [IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
67 3a227e9a 2021-03-18 op [IMSG_SAVE_CERT] = handle_save_cert,
68 288fd238 2021-04-25 op [IMSG_UPDATE_CERT] = handle_update_cert,
69 de2a69bb 2021-05-17 op [IMSG_FILE_OPEN] = handle_file_open,
70 c7107cec 2021-04-01 op [IMSG_SESSION_START] = handle_session_start,
71 c7107cec 2021-04-01 op [IMSG_SESSION_TAB] = handle_session_tab,
72 2f524b17 2021-07-17 op [IMSG_SESSION_TAB_TITLE] = handle_session_tab_title,
73 c7107cec 2021-04-01 op [IMSG_SESSION_END] = handle_session_end,
76 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
79 35e1f40a 2021-03-14 op abort(); /* TODO */
83 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
85 56e7efb4 2021-07-21 op const char *bpath = "bookmarks.gmi";
86 56e7efb4 2021-07-21 op char path[PATH_MAX], buf[BUFSIZ];
88 a2728733 2021-07-18 op const char *data, *p;
92 a2728733 2021-07-18 op const char *name;
93 56e7efb4 2021-07-21 op const char *path;
94 a2728733 2021-07-18 op const uint8_t *data;
97 56e7efb4 2021-07-21 op {"about", NULL, about_about, about_about_len},
98 56e7efb4 2021-07-21 op {"blank", NULL, about_blank, about_blank_len},
99 56e7efb4 2021-07-21 op {"bookmarks", bpath, bookmarks, bookmarks_len},
100 56e7efb4 2021-07-21 op {"crash", NULL, about_crash, about_crash_len},
101 56e7efb4 2021-07-21 op {"help", NULL, about_help, about_help_len},
102 56e7efb4 2021-07-21 op {"license", NULL, about_license, about_license_len},
103 56e7efb4 2021-07-21 op {"new", NULL, about_new, about_new_len},
104 56e7efb4 2021-07-21 op }, *page = NULL;
106 35e1f40a 2021-03-14 op data = imsg->data;
107 56e7efb4 2021-07-21 op if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
109 56e7efb4 2021-07-21 op if ((data = strchr(data, ':')) == NULL)
110 56e7efb4 2021-07-21 op goto notfound;
113 56e7efb4 2021-07-21 op for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
114 56e7efb4 2021-07-21 op if (!strcmp(data, pages[i].name)) {
115 56e7efb4 2021-07-21 op page = &pages[i];
119 56e7efb4 2021-07-21 op if (page == NULL)
120 56e7efb4 2021-07-21 op goto notfound;
122 56e7efb4 2021-07-21 op strlcpy(path, base_path, sizeof(path));
123 56e7efb4 2021-07-21 op strlcat(path, "/", sizeof(path));
124 56e7efb4 2021-07-21 op if (page->path != NULL)
125 56e7efb4 2021-07-21 op strlcat(path, page->path, sizeof(path));
127 56e7efb4 2021-07-21 op strlcat(path, "pages/about_", sizeof(path));
128 56e7efb4 2021-07-21 op strlcat(path, page->name, sizeof(path));
129 56e7efb4 2021-07-21 op strlcat(path, ".gmi", sizeof(path));
132 56e7efb4 2021-07-21 op if ((f = fopen(path, "r")) == NULL) {
133 56e7efb4 2021-07-21 op fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
134 56e7efb4 2021-07-21 op page->data, page->len);
135 56e7efb4 2021-07-21 op fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
141 56e7efb4 2021-07-21 op r = fread(buf, 1, sizeof(buf), f);
142 56e7efb4 2021-07-21 op fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, buf, r);
143 56e7efb4 2021-07-21 op if (r != sizeof(buf))
146 56e7efb4 2021-07-21 op fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
151 a2728733 2021-07-18 op p = "# not found!\n";
152 a2728733 2021-07-18 op fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
153 a2728733 2021-07-18 op fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
157 35e1f40a 2021-03-14 op handle_quit(struct imsg *imsg, size_t datalen)
159 35e1f40a 2021-03-14 op event_loopbreak();
163 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
169 740f578b 2021-03-15 op data = imsg->data;
170 740f578b 2021-03-15 op if (data[datalen-1] != '\0')
173 740f578b 2021-03-15 op if ((f = fopen(bookmark_file, "a")) == NULL) {
177 740f578b 2021-03-15 op fprintf(f, "=> %s\n", data);
182 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
186 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
188 3a227e9a 2021-03-18 op struct tofu_entry e;
192 3a227e9a 2021-03-18 op /* TODO: traverse the file to avoid duplications? */
194 3a227e9a 2021-03-18 op if (datalen != sizeof(e))
196 3a227e9a 2021-03-18 op memcpy(&e, imsg->data, datalen);
198 3a227e9a 2021-03-18 op if ((f = fopen(known_hosts_file, "a")) == NULL) {
202 3a227e9a 2021-03-18 op fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
207 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
208 288fd238 2021-04-25 op &res, sizeof(res));
212 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
214 288fd238 2021-04-25 op FILE *tmp, *f;
215 288fd238 2021-04-25 op struct tofu_entry entry;
216 288fd238 2021-04-25 op char sfn[PATH_MAX], *line = NULL, *t;
217 288fd238 2021-04-25 op size_t l, linesize = 0;
218 288fd238 2021-04-25 op ssize_t linelen;
219 288fd238 2021-04-25 op int fd, e, res = 0;
221 288fd238 2021-04-25 op if (datalen != sizeof(entry))
223 288fd238 2021-04-25 op memcpy(&entry, imsg->data, datalen);
225 288fd238 2021-04-25 op strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
226 288fd238 2021-04-25 op if ((fd = mkstemp(sfn)) == -1 ||
227 288fd238 2021-04-25 op (tmp = fdopen(fd, "w")) == NULL) {
228 288fd238 2021-04-25 op if (fd != -1) {
236 288fd238 2021-04-25 op if ((f = fopen(known_hosts_file, "r")) == NULL) {
243 288fd238 2021-04-25 op l = strlen(entry.domain);
244 288fd238 2021-04-25 op while ((linelen = getline(&line, &linesize, f)) != -1) {
245 288fd238 2021-04-25 op if ((t = strstr(line, entry.domain)) != NULL &&
246 288fd238 2021-04-25 op (line[l] == ' ' || line[l] == '\t'))
248 288fd238 2021-04-25 op /* line has a trailing \n */
249 288fd238 2021-04-25 op fprintf(tmp, "%s", line);
251 288fd238 2021-04-25 op fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
254 288fd238 2021-04-25 op e = ferror(tmp);
265 288fd238 2021-04-25 op res = rename(sfn, known_hosts_file) != -1;
268 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
269 3a227e9a 2021-03-18 op &res, sizeof(res));
273 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
275 de2a69bb 2021-05-17 op char *path, *e;
278 de2a69bb 2021-05-17 op path = imsg->data;
279 de2a69bb 2021-05-17 op if (path[datalen-1] != '\0')
282 de2a69bb 2021-05-17 op if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
283 de2a69bb 2021-05-17 op e = strerror(errno);
284 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
285 de2a69bb 2021-05-17 op e, strlen(e)+1);
287 bc10f6a5 2021-07-12 op fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
292 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
294 c7107cec 2021-04-01 op if (datalen != 0)
297 c7107cec 2021-04-01 op if ((session = fopen(session_file, "w")) == NULL)
302 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
305 87e3e801 2021-07-17 op uint32_t flags;
307 c7107cec 2021-04-01 op if (session == NULL)
310 87e3e801 2021-07-17 op flags = imsg->hdr.peerid;
311 58df4f47 2021-07-17 op url = imsg->data;
312 58df4f47 2021-07-17 op if (datalen == 0 || url[datalen-1] != '\0')
314 58df4f47 2021-07-17 op fprintf(session, "%s", url);
316 87e3e801 2021-07-17 op if (flags & TAB_CURRENT)
317 2f524b17 2021-07-17 op fprintf(session, " current ");
319 2f524b17 2021-07-17 op fprintf(session, " - ");
323 2f524b17 2021-07-17 op handle_session_tab_title(struct imsg *imsg, size_t datalen)
325 2f524b17 2021-07-17 op const char *title;
327 2f524b17 2021-07-17 op title = imsg->data;
328 2f524b17 2021-07-17 op if (title == NULL) {
333 2f524b17 2021-07-17 op if (title[datalen-1] != '\0')
336 2f524b17 2021-07-17 op fprintf(session, "%s\n", title);
340 c7107cec 2021-04-01 op handle_session_end(struct imsg *imsg, size_t datalen)
342 c7107cec 2021-04-01 op if (session == NULL)
344 c7107cec 2021-04-01 op fclose(session);
345 c7107cec 2021-04-01 op session = NULL;
349 1304bbdd 2021-03-15 op handle_dispatch_imsg(int fd, short ev, void *d)
351 bc10f6a5 2021-07-12 op struct imsgev *iev = d;
354 ea080950 2021-07-20 op if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
356 ea080950 2021-07-20 op * This should leave a ~/.telescope/crashed file to
357 ea080950 2021-07-20 op * trigger about:crash on next run. Unfortunately, if
358 ea080950 2021-07-20 op * the main process dies the fs sticks around and
359 ea080950 2021-07-20 op * doesn't notice that the fd was closed. Why EV_READ
360 ea080950 2021-07-20 op * is not triggered when a fd is closed on the other end?
363 ea080950 2021-07-20 op if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
365 ea080950 2021-07-20 op err(1, "open");
367 ea080950 2021-07-20 op errx(1, "connection closed: %s", strerror(e));
372 bc10f6a5 2021-07-12 op fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
373 bc10f6a5 2021-07-12 op uint16_t datalen)
375 bc10f6a5 2021-07-12 op return imsg_compose_event(iev_ui, type, peerid, 0, fd,
376 bc10f6a5 2021-07-12 op data, datalen);
380 3a227e9a 2021-03-18 op fs_init(void)
382 56e7efb4 2021-07-21 op strlcpy(base_path, getenv("HOME"), sizeof(base_path));
383 56e7efb4 2021-07-21 op strlcat(base_path, "/.telescope", sizeof(base_path));
384 56e7efb4 2021-07-21 op mkdir(base_path, 0700);
386 56e7efb4 2021-07-21 op strlcpy(lockfile_path, base_path, sizeof(lockfile_path));
387 56e7efb4 2021-07-21 op strlcat(lockfile_path, "/lock", sizeof(lockfile_path));
389 56e7efb4 2021-07-21 op strlcpy(bookmark_file, base_path, sizeof(bookmark_file));
390 56e7efb4 2021-07-21 op strlcat(bookmark_file, "/bookmarks.gmi", sizeof(bookmark_file));
392 56e7efb4 2021-07-21 op strlcpy(known_hosts_file, base_path, sizeof(known_hosts_file));
393 56e7efb4 2021-07-21 op strlcat(known_hosts_file, "/known_hosts", sizeof(known_hosts_file));
395 56e7efb4 2021-07-21 op strlcpy(known_hosts_tmp, base_path, sizeof(known_hosts_tmp));
396 56e7efb4 2021-07-21 op strlcat(known_hosts_tmp, "/known_hosts.tmp.XXXXXXXXXX",
397 288fd238 2021-04-25 op sizeof(known_hosts_file));
399 56e7efb4 2021-07-21 op strlcpy(session_file, base_path, sizeof(session_file));
400 56e7efb4 2021-07-21 op strlcat(session_file, "/session", sizeof(session_file));
402 56e7efb4 2021-07-21 op strlcpy(crashed_file, base_path, sizeof(crashed_file));
403 56e7efb4 2021-07-21 op strlcat(crashed_file, "/crashed", sizeof(crashed_file));
409 6cc5fcfe 2021-07-08 op fs_main(void)
411 6cc5fcfe 2021-07-08 op setproctitle("fs");
415 35e1f40a 2021-03-14 op event_init();
417 bc10f6a5 2021-07-12 op /* Setup pipe and event handler to the main process */
418 bc10f6a5 2021-07-12 op if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
420 bc10f6a5 2021-07-12 op imsg_init(&iev_ui->ibuf, 3);
421 bc10f6a5 2021-07-12 op iev_ui->handler = handle_dispatch_imsg;
422 bc10f6a5 2021-07-12 op iev_ui->events = EV_READ;
423 bc10f6a5 2021-07-12 op event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
424 bc10f6a5 2021-07-12 op iev_ui->handler, iev_ui);
425 bc10f6a5 2021-07-12 op event_add(&iev_ui->ev, NULL);
427 35e1f40a 2021-03-14 op sandbox_fs_process();
429 35e1f40a 2021-03-14 op event_dispatch();
436 b6171794 2021-07-20 op last_time_crashed(void)
440 b6171794 2021-07-20 op if ((fd = open(crashed_file, O_RDONLY)) == -1)
444 b6171794 2021-07-20 op unlink(crashed_file);
449 d0fd368a 2021-07-15 op lock_session(void)
451 d0fd368a 2021-07-15 op struct flock lock;
454 d0fd368a 2021-07-15 op if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
457 d0fd368a 2021-07-15 op lock.l_start = 0;
458 d0fd368a 2021-07-15 op lock.l_len = 0;
459 d0fd368a 2021-07-15 op lock.l_type = F_WRLCK;
460 d0fd368a 2021-07-15 op lock.l_whence = SEEK_SET;
462 d0fd368a 2021-07-15 op if (fcntl(fd, F_SETLK, &lock) == -1) {
471 c6d03cf5 2021-04-25 op parse_khost_line(char *line, char *tmp[3])
475 c6d03cf5 2021-04-25 op for (ap = tmp; ap < &tmp[3] &&
476 c6d03cf5 2021-04-25 op (*ap = strsep(&line, " \t\n")) != NULL;) {
477 c6d03cf5 2021-04-25 op if (**ap != '\0')
481 c6d03cf5 2021-04-25 op return ap == &tmp[3] && *line == '\0';
485 3a227e9a 2021-03-18 op load_certs(struct ohash *h)
487 c6d03cf5 2021-04-25 op char *tmp[3], *line = NULL;
488 6cd6a9e1 2021-03-20 op const char *errstr;
489 ec1fa0b0 2021-04-25 op size_t lineno = 0, linesize = 0;
490 3a227e9a 2021-03-18 op ssize_t linelen;
492 3a227e9a 2021-03-18 op struct tofu_entry *e;
494 3a227e9a 2021-03-18 op if ((f = fopen(known_hosts_file, "r")) == NULL)
497 3a227e9a 2021-03-18 op while ((linelen = getline(&line, &linesize, f)) != -1) {
498 3a227e9a 2021-03-18 op if ((e = calloc(1, sizeof(*e))) == NULL)
503 c6d03cf5 2021-04-25 op if (parse_khost_line(line, tmp)) {
504 c6d03cf5 2021-04-25 op strlcpy(e->domain, tmp[0], sizeof(e->domain));
505 c6d03cf5 2021-04-25 op strlcpy(e->hash, tmp[1], sizeof(e->hash));
507 c6d03cf5 2021-04-25 op e->verified = strtonum(tmp[2], 0, 1, &errstr);
508 c6d03cf5 2021-04-25 op if (errstr != NULL)
509 c6d03cf5 2021-04-25 op errx(1, "%s:%zu verification for %s is %s: %s",
510 c6d03cf5 2021-04-25 op known_hosts_file, lineno,
511 c6d03cf5 2021-04-25 op e->domain, errstr, tmp[2]);
512 c6d03cf5 2021-04-25 op tofu_add(h, e);
514 ec1fa0b0 2021-04-25 op warnx("%s:%zu invalid entry",
515 ec1fa0b0 2021-04-25 op known_hosts_file, lineno);
521 3a227e9a 2021-03-18 op return ferror(f);
