2 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
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.
18 * Handles the data in ~/.telescope
20 * TODO: add some form of locking on the files
35 #include "telescope.h"
38 static void die(void) __attribute__((__noreturn__));
39 static void send_file(uint32_t, FILE *);
40 static void handle_get(struct imsg*, size_t);
41 static void handle_get_file(struct imsg*, size_t);
42 static void handle_quit(struct imsg*, size_t);
43 static void handle_bookmark_page(struct imsg*, size_t);
44 static void handle_save_cert(struct imsg*, size_t);
45 static void handle_update_cert(struct imsg*, size_t);
46 static void handle_file_open(struct imsg*, size_t);
47 static void handle_session_start(struct imsg*, size_t);
48 static void handle_session_tab(struct imsg*, size_t);
49 static void handle_session_tab_title(struct imsg*, size_t);
50 static void handle_session_end(struct imsg*, size_t);
51 static void handle_dispatch_imsg(int, short, void*);
52 static int fs_send_ui(int, uint32_t, int, const void *, uint16_t);
54 static struct imsgev *iev_ui;
57 static char base_path[PATH_MAX];
58 static char lockfile_path[PATH_MAX];
59 static char bookmark_file[PATH_MAX];
60 static char known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
61 static char crashed_file[PATH_MAX];
63 char session_file[PATH_MAX];
65 static imsg_handlerfn *handlers[] = {
66 [IMSG_GET] = handle_get,
67 [IMSG_GET_FILE] = handle_get_file,
68 [IMSG_QUIT] = handle_quit,
69 [IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
70 [IMSG_SAVE_CERT] = handle_save_cert,
71 [IMSG_UPDATE_CERT] = handle_update_cert,
72 [IMSG_FILE_OPEN] = handle_file_open,
73 [IMSG_SESSION_START] = handle_session_start,
74 [IMSG_SESSION_TAB] = handle_session_tab,
75 [IMSG_SESSION_TAB_TITLE] = handle_session_tab_title,
76 [IMSG_SESSION_END] = handle_session_end,
79 static void __attribute__((__noreturn__))
86 send_file(uint32_t peerid, FILE *f)
92 r = fread(buf, 1, sizeof(buf), f);
94 fs_send_ui(IMSG_BUF, peerid, -1, buf, r);
98 fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
103 handle_get(struct imsg *imsg, size_t datalen)
105 const char *bpath = "bookmarks.gmi";
108 const char *data, *p;
116 {"about", NULL, about_about, about_about_len},
117 {"blank", NULL, about_blank, about_blank_len},
118 {"bookmarks", bpath, bookmarks, bookmarks_len},
119 {"crash", NULL, about_crash, about_crash_len},
120 {"help", NULL, about_help, about_help_len},
121 {"license", NULL, about_license, about_license_len},
122 {"new", NULL, about_new, about_new_len},
126 if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
128 if ((data = strchr(data, ':')) == NULL)
132 for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
133 if (!strcmp(data, pages[i].name)) {
141 strlcpy(path, base_path, sizeof(path));
142 strlcat(path, "/", sizeof(path));
143 if (page->path != NULL)
144 strlcat(path, page->path, sizeof(path));
146 strlcat(path, "pages/about_", sizeof(path));
147 strlcat(path, page->name, sizeof(path));
148 strlcat(path, ".gmi", sizeof(path));
151 if ((f = fopen(path, "r")) == NULL) {
152 fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
153 page->data, page->len);
154 fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
159 send_file(imsg->hdr.peerid, f);
163 p = "# not found!\n";
164 fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
165 fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
169 send_hdr(uint32_t peerid, int code, const char *meta)
171 fs_send_ui(IMSG_GOT_CODE, peerid, -1, &code, sizeof(code));
172 fs_send_ui(IMSG_GOT_META, peerid, -1, meta, strlen(meta)+1);
176 handle_get_file(struct imsg *imsg, size_t datalen)
182 {"diff", "text/x-patch"},
183 {"gemini", "text/gemini"},
184 {"gmi", "text/gemini"},
185 {"markdown", "text/plain"},
186 {"md", "text/plain"},
187 {"patch", "text/x-patch"},
188 {"txt", "text/plain"},
193 const char *meta = NULL;
197 data[datalen-1] = '\0';
199 if ((dot = strrchr(data, '.')) == NULL) {
200 send_hdr(imsg->hdr.peerid, 51,
201 "don't know how to visualize this file");
206 for (m = ms; m->ext != NULL; ++m) {
207 if (!strcmp(m->ext, dot)) {
214 send_hdr(imsg->hdr.peerid, 51,
215 "don't know how to visualize this file");
219 if ((f = fopen(data, "r")) == NULL) {
221 * If errno is EDIR it would be nice to serve the
222 * directory listing. See how it's done in gmid.
224 send_hdr(imsg->hdr.peerid, 51, "can't open the file");
228 send_hdr(imsg->hdr.peerid, 20, meta);
229 send_file(imsg->hdr.peerid, f);
233 handle_quit(struct imsg *imsg, size_t datalen)
239 handle_bookmark_page(struct imsg *imsg, size_t datalen)
246 if (data[datalen-1] != '\0')
249 if ((f = fopen(bookmark_file, "a")) == NULL) {
253 fprintf(f, "=> %s\n", data);
258 fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
262 handle_save_cert(struct imsg *imsg, size_t datalen)
268 /* TODO: traverse the file to avoid duplications? */
270 if (datalen != sizeof(e))
272 memcpy(&e, imsg->data, datalen);
274 if ((f = fopen(known_hosts_file, "a")) == NULL) {
278 fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
283 fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
288 handle_update_cert(struct imsg *imsg, size_t datalen)
291 struct tofu_entry entry;
292 char sfn[PATH_MAX], *line = NULL, *t;
293 size_t l, linesize = 0;
297 if (datalen != sizeof(entry))
299 memcpy(&entry, imsg->data, datalen);
301 strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
302 if ((fd = mkstemp(sfn)) == -1 ||
303 (tmp = fdopen(fd, "w")) == NULL) {
312 if ((f = fopen(known_hosts_file, "r")) == NULL) {
319 l = strlen(entry.domain);
320 while ((linelen = getline(&line, &linesize, f)) != -1) {
321 if ((t = strstr(line, entry.domain)) != NULL &&
322 (line[l] == ' ' || line[l] == '\t'))
324 /* line has a trailing \n */
325 fprintf(tmp, "%s", line);
327 fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
341 res = rename(sfn, known_hosts_file) != -1;
344 fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
349 handle_file_open(struct imsg *imsg, size_t datalen)
355 if (path[datalen-1] != '\0')
358 if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
360 fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
363 fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
368 handle_session_start(struct imsg *imsg, size_t datalen)
373 if ((session = fopen(session_file, "w")) == NULL)
378 handle_session_tab(struct imsg *imsg, size_t datalen)
386 flags = imsg->hdr.peerid;
388 if (datalen == 0 || url[datalen-1] != '\0')
390 fprintf(session, "%s", url);
392 if (flags & TAB_CURRENT)
393 fprintf(session, " current ");
395 fprintf(session, " - ");
399 handle_session_tab_title(struct imsg *imsg, size_t datalen)
409 if (title[datalen-1] != '\0')
412 fprintf(session, "%s\n", title);
416 handle_session_end(struct imsg *imsg, size_t datalen)
425 handle_dispatch_imsg(int fd, short ev, void *d)
427 struct imsgev *iev = d;
430 if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
432 * This should leave a ~/.telescope/crashed file to
433 * trigger about:crash on next run. Unfortunately, if
434 * the main process dies the fs sticks around and
435 * doesn't notice that the fd was closed. Why EV_READ
436 * is not triggered when a fd is closed on the other end?
439 if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
443 errx(1, "connection closed: %s", strerror(e));
448 fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
451 return imsg_compose_event(iev_ui, type, peerid, 0, fd,
458 strlcpy(base_path, getenv("HOME"), sizeof(base_path));
459 strlcat(base_path, "/.telescope", sizeof(base_path));
460 mkdir(base_path, 0700);
462 strlcpy(lockfile_path, base_path, sizeof(lockfile_path));
463 strlcat(lockfile_path, "/lock", sizeof(lockfile_path));
465 strlcpy(bookmark_file, base_path, sizeof(bookmark_file));
466 strlcat(bookmark_file, "/bookmarks.gmi", sizeof(bookmark_file));
468 strlcpy(known_hosts_file, base_path, sizeof(known_hosts_file));
469 strlcat(known_hosts_file, "/known_hosts", sizeof(known_hosts_file));
471 strlcpy(known_hosts_tmp, base_path, sizeof(known_hosts_tmp));
472 strlcat(known_hosts_tmp, "/known_hosts.tmp.XXXXXXXXXX",
473 sizeof(known_hosts_file));
475 strlcpy(session_file, base_path, sizeof(session_file));
476 strlcat(session_file, "/session", sizeof(session_file));
478 strlcpy(crashed_file, base_path, sizeof(crashed_file));
479 strlcat(crashed_file, "/crashed", sizeof(crashed_file));
493 /* Setup pipe and event handler to the main process */
494 if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
496 imsg_init(&iev_ui->ibuf, 3);
497 iev_ui->handler = handle_dispatch_imsg;
498 iev_ui->events = EV_READ;
499 event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
500 iev_ui->handler, iev_ui);
501 event_add(&iev_ui->ev, NULL);
503 sandbox_fs_process();
512 last_time_crashed(void)
516 if ((fd = open(crashed_file, O_RDONLY)) == -1)
520 unlink(crashed_file);
530 if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
535 lock.l_type = F_WRLCK;
536 lock.l_whence = SEEK_SET;
538 if (fcntl(fd, F_SETLK, &lock) == -1) {
547 parse_khost_line(char *line, char *tmp[3])
551 for (ap = tmp; ap < &tmp[3] &&
552 (*ap = strsep(&line, " \t\n")) != NULL;) {
557 return ap == &tmp[3] && *line == '\0';
561 load_certs(struct ohash *h)
563 char *tmp[3], *line = NULL;
565 size_t lineno = 0, linesize = 0;
568 struct tofu_entry *e;
570 if ((f = fopen(known_hosts_file, "r")) == NULL)
573 while ((linelen = getline(&line, &linesize, f)) != -1) {
574 if ((e = calloc(1, sizeof(*e))) == NULL)
579 if (parse_khost_line(line, tmp)) {
580 strlcpy(e->domain, tmp[0], sizeof(e->domain));
581 strlcpy(e->hash, tmp[1], sizeof(e->hash));
583 e->verified = strtonum(tmp[2], 0, 1, &errstr);
585 errx(1, "%s:%zu verification for %s is %s: %s",
586 known_hosts_file, lineno,
587 e->domain, errstr, tmp[2]);
590 warnx("%s:%zu invalid entry",
591 known_hosts_file, lineno);