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Date:: Fri Feb 11 18:12:17 2022 UTC
Message:: remote open: open an url into telescope from outside of it if telescope is started with an url while there is already another instance of it running and the -S flag is not provided, the link will be automagically opened into the running instance of telescope. Telescope now listens on a UNIX domain socket in ~/.telescope/ctl (or ~/.cache/telescope/ctl if XDG is used) for commands.
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  1 35e1f40a 2021-03-14 op /*
  2 35e1f40a 2021-03-14 op  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
  3 35e1f40a 2021-03-14 op  *
  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.
  7 35e1f40a 2021-03-14 op  *
  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.
 15 35e1f40a 2021-03-14 op  */
 16 35e1f40a 2021-03-14 op 
 17 740f578b 2021-03-15 op /*
 18 eb2ed626 2021-10-07 op  * Handles config and runtime files
 19 740f578b 2021-03-15 op  */
 20 786e6deb 2021-07-21 op 
 21 786e6deb 2021-07-21 op #include "compat.h"
 22 35e1f40a 2021-03-14 op 
 23 6cd6a9e1 2021-03-20 op #include <sys/stat.h>
 24 65124267 2021-08-13 op #include <sys/types.h>
 25 6cd6a9e1 2021-03-20 op 
 26 65124267 2021-08-13 op #include <dirent.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 eb2ed626 2021-10-07 op #include <libgen.h>
 31 35e1f40a 2021-03-14 op #include <stdio.h>
 32 35e1f40a 2021-03-14 op #include <stdlib.h>
 33 35e1f40a 2021-03-14 op #include <string.h>
 34 35e1f40a 2021-03-14 op #include <unistd.h>
 35 4913b479 2021-07-12 op 
 36 eb2ed626 2021-10-07 op #include "fs.h"
 37 5a824be4 2021-07-13 op #include "pages.h"
 38 328e7915 2021-09-19 op #include "telescope.h"
 39 eb9cbcba 2022-01-03 op #include "session.h"
 40 9d65b1d9 2022-01-11 op #include "utils.h"
 41 35e1f40a 2021-03-14 op 
 42 35e1f40a 2021-03-14 op static void		 die(void) __attribute__((__noreturn__));
 43 fb4dc49f 2021-08-13 op static void		 send_file(uint32_t, FILE *);
 44 35e1f40a 2021-03-14 op static void		 handle_get(struct imsg*, size_t);
 45 5cbe1763 2021-08-13 op static int		 select_non_dot(const struct dirent *);
 46 5cbe1763 2021-08-13 op static int		 select_non_dotdot(const struct dirent *);
 47 fb4dc49f 2021-08-13 op static void		 handle_get_file(struct imsg*, size_t);
 48 50f03682 2022-01-03 op static void		 handle_misc(struct imsg *, size_t);
 49 740f578b 2021-03-15 op static void		 handle_bookmark_page(struct imsg*, size_t);
 50 3a227e9a 2021-03-18 op static void		 handle_save_cert(struct imsg*, size_t);
 51 288fd238 2021-04-25 op static void		 handle_update_cert(struct imsg*, size_t);
 52 de2a69bb 2021-05-17 op static void		 handle_file_open(struct imsg*, size_t);
 53 c7107cec 2021-04-01 op static void		 handle_session_start(struct imsg*, size_t);
 54 c7107cec 2021-04-01 op static void		 handle_session_tab(struct imsg*, size_t);
 55 1040cc7f 2021-01-02 op static void		 handle_session_tab_hist(struct imsg*, size_t);
 56 c7107cec 2021-04-01 op static void		 handle_session_end(struct imsg*, size_t);
 57 1304bbdd 2021-03-15 op static void		 handle_dispatch_imsg(int, short, void*);
 58 bc10f6a5 2021-07-12 op static int		 fs_send_ui(int, uint32_t, int, const void *, uint16_t);
 59 eb2ed626 2021-10-07 op static size_t		 join_path(char*, const char*, const char*, size_t);
 60 eb2ed626 2021-10-07 op static void		 getenv_default(char*, const char*, const char*, size_t);
 61 eb2ed626 2021-10-07 op static void		 mkdirs(const char*, mode_t);
 62 6c8ddace 2022-01-03 op static void		 init_paths(void);
 63 50f03682 2022-01-03 op static void		 load_last_session(void);
 64 83ed72f1 2022-01-03 op static int		 last_time_crashed(void);
 65 eb722b50 2022-01-03 op static void		 load_certs(void);
 66 35e1f40a 2021-03-14 op 
 67 bc10f6a5 2021-07-12 op static struct imsgev		*iev_ui;
 68 c7107cec 2021-04-01 op static FILE			*session;
 69 eb2ed626 2021-10-07 op 
 70 f88fbabc 2021-11-27 op /*
 71 f88fbabc 2021-11-27 op  * Where to store user data.  These are all equal to ~/.telescope if
 72 f88fbabc 2021-11-27 op  * it exists.
 73 f88fbabc 2021-11-27 op  */
 74 fb3d08c1 2021-10-07 op char		config_path_base[PATH_MAX];
 75 fb3d08c1 2021-10-07 op char		data_path_base[PATH_MAX];
 76 fb3d08c1 2021-10-07 op char		cache_path_base[PATH_MAX];
 77 eb2ed626 2021-10-07 op 
 78 4cf6ba13 2022-02-11 op char		ctlsock_path[PATH_MAX];
 79 eb2ed626 2021-10-07 op char		config_path[PATH_MAX];
 80 fb3d08c1 2021-10-07 op char		lockfile_path[PATH_MAX];
 81 fb3d08c1 2021-10-07 op char		bookmark_file[PATH_MAX];
 82 fb3d08c1 2021-10-07 op char		known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
 83 fb3d08c1 2021-10-07 op char		crashed_file[PATH_MAX];
 84 fb3d08c1 2021-10-07 op char		session_file[PATH_MAX];
 85 740f578b 2021-03-15 op 
 86 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
 87 35e1f40a 2021-03-14 op 	[IMSG_GET] = handle_get,
 88 fb4dc49f 2021-08-13 op 	[IMSG_GET_FILE] = handle_get_file,
 89 50f03682 2022-01-03 op 	[IMSG_QUIT] = handle_misc,
 90 50f03682 2022-01-03 op 	[IMSG_INIT] = handle_misc,
 91 740f578b 2021-03-15 op 	[IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
 92 3a227e9a 2021-03-18 op 	[IMSG_SAVE_CERT] = handle_save_cert,
 93 288fd238 2021-04-25 op 	[IMSG_UPDATE_CERT] = handle_update_cert,
 94 de2a69bb 2021-05-17 op 	[IMSG_FILE_OPEN] = handle_file_open,
 95 c7107cec 2021-04-01 op 	[IMSG_SESSION_START] = handle_session_start,
 96 c7107cec 2021-04-01 op 	[IMSG_SESSION_TAB] = handle_session_tab,
 97 1040cc7f 2021-01-02 op 	[IMSG_SESSION_TAB_HIST] = handle_session_tab_hist,
 98 c7107cec 2021-04-01 op 	[IMSG_SESSION_END] = handle_session_end,
 99 35e1f40a 2021-03-14 op };
100 35e1f40a 2021-03-14 op 
101 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
102 35e1f40a 2021-03-14 op die(void)
103 35e1f40a 2021-03-14 op {
104 35e1f40a 2021-03-14 op 	abort(); 		/* TODO */
105 35e1f40a 2021-03-14 op }
106 35e1f40a 2021-03-14 op 
107 35e1f40a 2021-03-14 op static void
108 fb4dc49f 2021-08-13 op send_file(uint32_t peerid, FILE *f)
109 fb4dc49f 2021-08-13 op {
110 fb4dc49f 2021-08-13 op 	ssize_t	 r;
111 fb4dc49f 2021-08-13 op 	char	 buf[BUFSIZ];
112 fb4dc49f 2021-08-13 op 
113 fb4dc49f 2021-08-13 op 	for (;;) {
114 fb4dc49f 2021-08-13 op 		r = fread(buf, 1, sizeof(buf), f);
115 fb4dc49f 2021-08-13 op 		if (r != 0)
116 fb4dc49f 2021-08-13 op 			fs_send_ui(IMSG_BUF, peerid, -1, buf, r);
117 fb4dc49f 2021-08-13 op 		if (r != sizeof(buf))
118 fb4dc49f 2021-08-13 op 			break;
119 fb4dc49f 2021-08-13 op 	}
120 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
121 fb4dc49f 2021-08-13 op 	fclose(f);
122 fb4dc49f 2021-08-13 op }
123 fb4dc49f 2021-08-13 op 
124 fb4dc49f 2021-08-13 op static void
125 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
126 35e1f40a 2021-03-14 op {
127 56e7efb4 2021-07-21 op 	const char	*bpath = "bookmarks.gmi";
128 fb4dc49f 2021-08-13 op 	char		 path[PATH_MAX];
129 56e7efb4 2021-07-21 op 	FILE		*f;
130 a2728733 2021-07-18 op 	const char	*data, *p;
131 a2728733 2021-07-18 op 	size_t		 i;
132 a2728733 2021-07-18 op 	struct page {
133 a2728733 2021-07-18 op 		const char	*name;
134 56e7efb4 2021-07-21 op 		const char	*path;
135 a2728733 2021-07-18 op 		const uint8_t	*data;
136 a2728733 2021-07-18 op 		size_t		 len;
137 a2728733 2021-07-18 op 	} pages[] = {
138 56e7efb4 2021-07-21 op 		{"about",	NULL,	about_about,	about_about_len},
139 56e7efb4 2021-07-21 op 		{"blank",	NULL,	about_blank,	about_blank_len},
140 56e7efb4 2021-07-21 op 		{"bookmarks",	bpath,	bookmarks,	bookmarks_len},
141 56e7efb4 2021-07-21 op 		{"crash",	NULL,	about_crash,	about_crash_len},
142 56e7efb4 2021-07-21 op 		{"help",	NULL,	about_help,	about_help_len},
143 56e7efb4 2021-07-21 op 		{"license",	NULL,	about_license,	about_license_len},
144 56e7efb4 2021-07-21 op 		{"new",		NULL,	about_new,	about_new_len},
145 56e7efb4 2021-07-21 op 	}, *page = NULL;
146 35e1f40a 2021-03-14 op 
147 35e1f40a 2021-03-14 op 	data = imsg->data;
148 56e7efb4 2021-07-21 op 	if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
149 35e1f40a 2021-03-14 op 		die();
150 56e7efb4 2021-07-21 op 	if ((data = strchr(data, ':')) == NULL)
151 56e7efb4 2021-07-21 op 		goto notfound;
152 56e7efb4 2021-07-21 op 	data++;
153 35e1f40a 2021-03-14 op 
154 56e7efb4 2021-07-21 op 	for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
155 56e7efb4 2021-07-21 op 		if (!strcmp(data, pages[i].name)) {
156 56e7efb4 2021-07-21 op 			page = &pages[i];
157 56e7efb4 2021-07-21 op 			break;
158 56e7efb4 2021-07-21 op 		}
159 56e7efb4 2021-07-21 op 
160 56e7efb4 2021-07-21 op 	if (page == NULL)
161 56e7efb4 2021-07-21 op 		goto notfound;
162 56e7efb4 2021-07-21 op 
163 de04b178 2021-11-26 op 	strlcpy(path, data_path_base, sizeof(path));
164 56e7efb4 2021-07-21 op 	strlcat(path, "/", sizeof(path));
165 56e7efb4 2021-07-21 op 	if (page->path != NULL)
166 56e7efb4 2021-07-21 op 		strlcat(path, page->path, sizeof(path));
167 56e7efb4 2021-07-21 op 	else {
168 56e7efb4 2021-07-21 op 		strlcat(path, "pages/about_", sizeof(path));
169 56e7efb4 2021-07-21 op 		strlcat(path, page->name, sizeof(path));
170 56e7efb4 2021-07-21 op 		strlcat(path, ".gmi", sizeof(path));
171 56e7efb4 2021-07-21 op 	}
172 56e7efb4 2021-07-21 op 
173 56e7efb4 2021-07-21 op 	if ((f = fopen(path, "r")) == NULL) {
174 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
175 56e7efb4 2021-07-21 op 		    page->data, page->len);
176 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
177 56e7efb4 2021-07-21 op 		    NULL, 0);
178 a2728733 2021-07-18 op 		return;
179 35e1f40a 2021-03-14 op 	}
180 a2728733 2021-07-18 op 
181 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
182 56e7efb4 2021-07-21 op 	return;
183 56e7efb4 2021-07-21 op 
184 56e7efb4 2021-07-21 op notfound:
185 a2728733 2021-07-18 op 	p = "# not found!\n";
186 a2728733 2021-07-18 op 	fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
187 a2728733 2021-07-18 op 	fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
188 fb4dc49f 2021-08-13 op }
189 fb4dc49f 2021-08-13 op 
190 fb4dc49f 2021-08-13 op static inline void
191 fb4dc49f 2021-08-13 op send_hdr(uint32_t peerid, int code, const char *meta)
192 fb4dc49f 2021-08-13 op {
193 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_CODE, peerid, -1, &code, sizeof(code));
194 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_META, peerid, -1, meta, strlen(meta)+1);
195 fb4dc49f 2021-08-13 op }
196 fb4dc49f 2021-08-13 op 
197 24a68158 2021-08-13 op static inline void
198 24a68158 2021-08-13 op send_errno(uint32_t peerid, int code, const char *str, int no)
199 24a68158 2021-08-13 op {
200 24a68158 2021-08-13 op 	char *s;
201 24a68158 2021-08-13 op 
202 24a68158 2021-08-13 op 	if (asprintf(&s, "%s: %s", str, strerror(no)) == -1)
203 24a68158 2021-08-13 op 		s = NULL;
204 24a68158 2021-08-13 op 
205 24a68158 2021-08-13 op 	send_hdr(peerid, code, s == NULL ? str : s);
206 24a68158 2021-08-13 op 	free(s);
207 24a68158 2021-08-13 op }
208 24a68158 2021-08-13 op 
209 65124267 2021-08-13 op static inline const char *
210 65124267 2021-08-13 op file_type(const char *path)
211 fb4dc49f 2021-08-13 op {
212 fb4dc49f 2021-08-13 op 	struct mapping {
213 fb4dc49f 2021-08-13 op 		const char	*ext;
214 fb4dc49f 2021-08-13 op 		const char	*mime;
215 fb4dc49f 2021-08-13 op 	} ms[] = {
216 fb4dc49f 2021-08-13 op 		{"diff",	"text/x-patch"},
217 fb4dc49f 2021-08-13 op 		{"gemini",	"text/gemini"},
218 fb4dc49f 2021-08-13 op 		{"gmi",		"text/gemini"},
219 fb4dc49f 2021-08-13 op 		{"markdown",	"text/plain"},
220 fb4dc49f 2021-08-13 op 		{"md",		"text/plain"},
221 fb4dc49f 2021-08-13 op 		{"patch",	"text/x-patch"},
222 fb4dc49f 2021-08-13 op 		{"txt",		"text/plain"},
223 fb4dc49f 2021-08-13 op 		{NULL, NULL},
224 65124267 2021-08-13 op 	}, *m;
225 65124267 2021-08-13 op 	char *dot;
226 65124267 2021-08-13 op 
227 65124267 2021-08-13 op 	if ((dot = strrchr(path, '.')) == NULL)
228 65124267 2021-08-13 op 		return NULL;
229 65124267 2021-08-13 op 
230 65124267 2021-08-13 op 	dot++;
231 65124267 2021-08-13 op 
232 65124267 2021-08-13 op 	for (m = ms; m->ext != NULL; ++m)
233 65124267 2021-08-13 op 		if (!strcmp(m->ext, dot))
234 65124267 2021-08-13 op 			return m->mime;
235 65124267 2021-08-13 op 
236 65124267 2021-08-13 op 	return NULL;
237 5cbe1763 2021-08-13 op }
238 5cbe1763 2021-08-13 op 
239 5cbe1763 2021-08-13 op static int
240 5cbe1763 2021-08-13 op select_non_dot(const struct dirent *d)
241 5cbe1763 2021-08-13 op {
242 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".");
243 5cbe1763 2021-08-13 op }
244 5cbe1763 2021-08-13 op 
245 5cbe1763 2021-08-13 op static int
246 5cbe1763 2021-08-13 op select_non_dotdot(const struct dirent *d)
247 5cbe1763 2021-08-13 op {
248 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".") && strcmp(d->d_name, "..");
249 65124267 2021-08-13 op }
250 65124267 2021-08-13 op 
251 65124267 2021-08-13 op static inline void
252 65124267 2021-08-13 op send_dir(uint32_t peerid, const char *path)
253 65124267 2021-08-13 op {
254 65124267 2021-08-13 op 	struct dirent	**names;
255 65124267 2021-08-13 op 	struct evbuffer	 *ev;
256 5d43215b 2021-08-13 op 	char		 *s;
257 5cbe1763 2021-08-13 op 	int		(*selector)(const struct dirent *) = select_non_dot;
258 24a68158 2021-08-13 op 	int		  i, len, no;
259 65124267 2021-08-13 op 
260 5d43215b 2021-08-13 op 	if (!has_suffix(path, "/")) {
261 5d43215b 2021-08-13 op 		if (asprintf(&s, "%s/", path) == -1)
262 5d43215b 2021-08-13 op 			die();
263 5d43215b 2021-08-13 op 		send_hdr(peerid, 30, s);
264 5d43215b 2021-08-13 op 		free(s);
265 5d43215b 2021-08-13 op 		return;
266 5d43215b 2021-08-13 op 	}
267 5d43215b 2021-08-13 op 
268 5cbe1763 2021-08-13 op 	if (!strcmp(path, "/"))
269 5cbe1763 2021-08-13 op 		selector = select_non_dotdot;
270 5cbe1763 2021-08-13 op 
271 65124267 2021-08-13 op 	if ((ev = evbuffer_new()) == NULL ||
272 5cbe1763 2021-08-13 op 	    (len = scandir(path, &names, selector, alphasort)) == -1) {
273 24a68158 2021-08-13 op 		no = errno;
274 65124267 2021-08-13 op 		evbuffer_free(ev);
275 24a68158 2021-08-13 op 		send_errno(peerid, 40, "failure reading the directory", no);
276 65124267 2021-08-13 op 		return;
277 65124267 2021-08-13 op 	}
278 65124267 2021-08-13 op 
279 65124267 2021-08-13 op 	evbuffer_add_printf(ev, "# Index of %s\n\n", path);
280 65124267 2021-08-13 op 	for (i = 0; i < len; ++i) {
281 65124267 2021-08-13 op 		evbuffer_add_printf(ev, "=> %s", names[i]->d_name);
282 65124267 2021-08-13 op 		if (names[i]->d_type == DT_DIR)
283 65124267 2021-08-13 op 			evbuffer_add(ev, "/", 1);
284 65124267 2021-08-13 op 		evbuffer_add(ev, "\n", 1);
285 65124267 2021-08-13 op 	}
286 65124267 2021-08-13 op 
287 65124267 2021-08-13 op 	send_hdr(peerid, 20, "text/gemini");
288 65124267 2021-08-13 op 	fs_send_ui(IMSG_BUF, peerid, -1,
289 65124267 2021-08-13 op 	    EVBUFFER_DATA(ev), EVBUFFER_LENGTH(ev));
290 65124267 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
291 65124267 2021-08-13 op 
292 65124267 2021-08-13 op 	evbuffer_free(ev);
293 65124267 2021-08-13 op 	free(names);
294 65124267 2021-08-13 op }
295 65124267 2021-08-13 op 
296 65124267 2021-08-13 op static void
297 65124267 2021-08-13 op handle_get_file(struct imsg *imsg, size_t datalen)
298 65124267 2021-08-13 op {
299 65124267 2021-08-13 op 	struct stat	 sb;
300 fb4dc49f 2021-08-13 op 	FILE		*f;
301 65124267 2021-08-13 op 	char		*data;
302 fb4dc49f 2021-08-13 op 	const char	*meta = NULL;
303 fb4dc49f 2021-08-13 op 
304 fb4dc49f 2021-08-13 op 	data = imsg->data;
305 fb4dc49f 2021-08-13 op 	data[datalen-1] = '\0';
306 fb4dc49f 2021-08-13 op 
307 65124267 2021-08-13 op 	if ((f = fopen(data, "r")) == NULL) {
308 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 51, "can't open", errno);
309 fb4dc49f 2021-08-13 op 		return;
310 fb4dc49f 2021-08-13 op 	}
311 fb4dc49f 2021-08-13 op 
312 65124267 2021-08-13 op 	if (fstat(fileno(f), &sb) == -1) {
313 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 40, "fstat", errno);
314 65124267 2021-08-13 op 		return;
315 fb4dc49f 2021-08-13 op 	}
316 fb4dc49f 2021-08-13 op 
317 65124267 2021-08-13 op 	if (S_ISDIR(sb.st_mode)) {
318 65124267 2021-08-13 op 		fclose(f);
319 65124267 2021-08-13 op 		send_dir(imsg->hdr.peerid, data);
320 fb4dc49f 2021-08-13 op 		return;
321 fb4dc49f 2021-08-13 op 	}
322 fb4dc49f 2021-08-13 op 
323 65124267 2021-08-13 op 	if ((meta = file_type(data)) == NULL) {
324 65124267 2021-08-13 op 		fclose(f);
325 65124267 2021-08-13 op 		send_hdr(imsg->hdr.peerid, 51,
326 65124267 2021-08-13 op 		    "don't know how to visualize this file");
327 fb4dc49f 2021-08-13 op 		return;
328 fb4dc49f 2021-08-13 op 	}
329 fb4dc49f 2021-08-13 op 
330 fb4dc49f 2021-08-13 op 	send_hdr(imsg->hdr.peerid, 20, meta);
331 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
332 35e1f40a 2021-03-14 op }
333 35e1f40a 2021-03-14 op 
334 35e1f40a 2021-03-14 op static void
335 50f03682 2022-01-03 op handle_misc(struct imsg *imsg, size_t datalen)
336 50f03682 2022-01-03 op {
337 50f03682 2022-01-03 op 	switch (imsg->hdr.type) {
338 50f03682 2022-01-03 op 	case IMSG_INIT:
339 eb722b50 2022-01-03 op 		load_certs();
340 50f03682 2022-01-03 op 		load_last_session();
341 50f03682 2022-01-03 op 		break;
342 be97d6e6 2021-08-15 op 
343 50f03682 2022-01-03 op 	case IMSG_QUIT:
344 50f03682 2022-01-03 op 		if (!safe_mode)
345 50f03682 2022-01-03 op 			unlink(crashed_file);
346 50f03682 2022-01-03 op 		event_loopbreak();
347 50f03682 2022-01-03 op 		break;
348 50f03682 2022-01-03 op 
349 50f03682 2022-01-03 op 	default:
350 50f03682 2022-01-03 op 		die();
351 50f03682 2022-01-03 op 	}
352 35e1f40a 2021-03-14 op }
353 35e1f40a 2021-03-14 op 
354 35e1f40a 2021-03-14 op static void
355 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
356 740f578b 2021-03-15 op {
357 740f578b 2021-03-15 op 	char	*data;
358 740f578b 2021-03-15 op 	int	 res;
359 740f578b 2021-03-15 op 	FILE	*f;
360 740f578b 2021-03-15 op 
361 740f578b 2021-03-15 op 	data = imsg->data;
362 740f578b 2021-03-15 op 	if (data[datalen-1] != '\0')
363 740f578b 2021-03-15 op 		die();
364 740f578b 2021-03-15 op 
365 740f578b 2021-03-15 op 	if ((f = fopen(bookmark_file, "a")) == NULL) {
366 740f578b 2021-03-15 op 		res = errno;
367 740f578b 2021-03-15 op 		goto end;
368 740f578b 2021-03-15 op 	}
369 740f578b 2021-03-15 op 	fprintf(f, "=> %s\n", data);
370 740f578b 2021-03-15 op 	fclose(f);
371 740f578b 2021-03-15 op 
372 740f578b 2021-03-15 op 	res = 0;
373 740f578b 2021-03-15 op end:
374 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
375 740f578b 2021-03-15 op }
376 740f578b 2021-03-15 op 
377 740f578b 2021-03-15 op static void
378 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
379 3a227e9a 2021-03-18 op {
380 3a227e9a 2021-03-18 op 	struct tofu_entry	 e;
381 3a227e9a 2021-03-18 op 	FILE			*f;
382 3a227e9a 2021-03-18 op 	int			 res;
383 3a227e9a 2021-03-18 op 
384 3a227e9a 2021-03-18 op 	/* TODO: traverse the file to avoid duplications? */
385 3a227e9a 2021-03-18 op 
386 3a227e9a 2021-03-18 op 	if (datalen != sizeof(e))
387 3a227e9a 2021-03-18 op 		die();
388 3a227e9a 2021-03-18 op 	memcpy(&e, imsg->data, datalen);
389 3a227e9a 2021-03-18 op 
390 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "a")) == NULL) {
391 3a227e9a 2021-03-18 op 		res = errno;
392 3a227e9a 2021-03-18 op 		goto end;
393 3a227e9a 2021-03-18 op 	}
394 3a227e9a 2021-03-18 op 	fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
395 3a227e9a 2021-03-18 op 	fclose(f);
396 3a227e9a 2021-03-18 op 
397 3a227e9a 2021-03-18 op 	res = 0;
398 3a227e9a 2021-03-18 op end:
399 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
400 288fd238 2021-04-25 op 	    &res, sizeof(res));
401 288fd238 2021-04-25 op }
402 288fd238 2021-04-25 op 
403 288fd238 2021-04-25 op static void
404 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
405 288fd238 2021-04-25 op {
406 288fd238 2021-04-25 op 	FILE	*tmp, *f;
407 288fd238 2021-04-25 op 	struct	 tofu_entry entry;
408 288fd238 2021-04-25 op 	char	 sfn[PATH_MAX], *line = NULL, *t;
409 288fd238 2021-04-25 op 	size_t	 l, linesize = 0;
410 288fd238 2021-04-25 op 	ssize_t	 linelen;
411 288fd238 2021-04-25 op 	int	 fd, e, res = 0;
412 288fd238 2021-04-25 op 
413 288fd238 2021-04-25 op 	if (datalen != sizeof(entry))
414 288fd238 2021-04-25 op 		die();
415 288fd238 2021-04-25 op 	memcpy(&entry, imsg->data, datalen);
416 288fd238 2021-04-25 op 
417 288fd238 2021-04-25 op 	strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
418 288fd238 2021-04-25 op 	if ((fd = mkstemp(sfn)) == -1 ||
419 288fd238 2021-04-25 op 	    (tmp = fdopen(fd, "w")) == NULL) {
420 288fd238 2021-04-25 op 		if (fd != -1) {
421 288fd238 2021-04-25 op 			unlink(sfn);
422 288fd238 2021-04-25 op 			close(fd);
423 288fd238 2021-04-25 op 		}
424 288fd238 2021-04-25 op 		res = 0;
425 288fd238 2021-04-25 op 		goto end;
426 288fd238 2021-04-25 op 	}
427 288fd238 2021-04-25 op 
428 288fd238 2021-04-25 op 	if ((f = fopen(known_hosts_file, "r")) == NULL) {
429 288fd238 2021-04-25 op 		unlink(sfn);
430 288fd238 2021-04-25 op 		fclose(tmp);
431 288fd238 2021-04-25 op                 res = 0;
432 288fd238 2021-04-25 op 		goto end;
433 288fd238 2021-04-25 op 	}
434 288fd238 2021-04-25 op 
435 288fd238 2021-04-25 op 	l = strlen(entry.domain);
436 288fd238 2021-04-25 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
437 288fd238 2021-04-25 op 		if ((t = strstr(line, entry.domain)) != NULL &&
438 288fd238 2021-04-25 op 		    (line[l] == ' ' || line[l] == '\t'))
439 288fd238 2021-04-25 op 			continue;
440 288fd238 2021-04-25 op 		/* line has a trailing \n */
441 288fd238 2021-04-25 op 		fprintf(tmp, "%s", line);
442 288fd238 2021-04-25 op 	}
443 288fd238 2021-04-25 op 	fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
444 288fd238 2021-04-25 op 
445 288fd238 2021-04-25 op 	free(line);
446 288fd238 2021-04-25 op 	e = ferror(tmp);
447 288fd238 2021-04-25 op 
448 288fd238 2021-04-25 op 	fclose(tmp);
449 288fd238 2021-04-25 op 	fclose(f);
450 288fd238 2021-04-25 op 
451 288fd238 2021-04-25 op 	if (e) {
452 288fd238 2021-04-25 op 		unlink(sfn);
453 288fd238 2021-04-25 op 		res = 0;
454 288fd238 2021-04-25 op 		goto end;
455 288fd238 2021-04-25 op 	}
456 288fd238 2021-04-25 op 
457 288fd238 2021-04-25 op 	res = rename(sfn, known_hosts_file) != -1;
458 288fd238 2021-04-25 op 
459 288fd238 2021-04-25 op end:
460 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
461 3a227e9a 2021-03-18 op 	    &res, sizeof(res));
462 de2a69bb 2021-05-17 op }
463 de2a69bb 2021-05-17 op 
464 de2a69bb 2021-05-17 op static void
465 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
466 de2a69bb 2021-05-17 op {
467 de2a69bb 2021-05-17 op 	char	*path, *e;
468 de2a69bb 2021-05-17 op 	int	 fd;
469 de2a69bb 2021-05-17 op 
470 de2a69bb 2021-05-17 op 	path = imsg->data;
471 de2a69bb 2021-05-17 op 	if (path[datalen-1] != '\0')
472 de2a69bb 2021-05-17 op 		die();
473 de2a69bb 2021-05-17 op 
474 de2a69bb 2021-05-17 op 	if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
475 de2a69bb 2021-05-17 op 		e = strerror(errno);
476 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
477 de2a69bb 2021-05-17 op 		    e, strlen(e)+1);
478 de2a69bb 2021-05-17 op 	} else
479 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
480 de2a69bb 2021-05-17 op 		    NULL, 0);
481 3a227e9a 2021-03-18 op }
482 3a227e9a 2021-03-18 op 
483 3a227e9a 2021-03-18 op static void
484 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
485 c7107cec 2021-04-01 op {
486 c7107cec 2021-04-01 op 	if (datalen != 0)
487 c7107cec 2021-04-01 op 		die();
488 c7107cec 2021-04-01 op 
489 c7107cec 2021-04-01 op 	if ((session = fopen(session_file, "w")) == NULL)
490 c7107cec 2021-04-01 op 		die();
491 c7107cec 2021-04-01 op }
492 c7107cec 2021-04-01 op 
493 c7107cec 2021-04-01 op static void
494 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
495 c7107cec 2021-04-01 op {
496 f8c6e753 2021-12-30 op 	struct session_tab	tab;
497 58df4f47 2021-07-17 op 
498 c7107cec 2021-04-01 op 	if (session == NULL)
499 c7107cec 2021-04-01 op 		die();
500 c7107cec 2021-04-01 op 
501 f8c6e753 2021-12-30 op 	if (datalen != sizeof(tab))
502 c7107cec 2021-04-01 op 		die();
503 87e3e801 2021-07-17 op 
504 f8c6e753 2021-12-30 op 	memcpy(&tab, imsg->data, sizeof(tab));
505 f8c6e753 2021-12-30 op 	if (tab.uri[sizeof(tab.uri)-1] != '\0' ||
506 f8c6e753 2021-12-30 op 	    tab.title[sizeof(tab.title)-1] != '\0')
507 f8c6e753 2021-12-30 op 		die();
508 f8c6e753 2021-12-30 op 
509 e795e935 2022-01-18 op 	fprintf(session, "%s ", tab.uri);
510 f8c6e753 2021-12-30 op 
511 e795e935 2022-01-18 op 	if (tab.flags & TAB_CURRENT)
512 e795e935 2022-01-18 op 		fprintf(session, "current,");
513 e795e935 2022-01-18 op 	if (tab.flags & TAB_KILLED)
514 e795e935 2022-01-18 op 		fprintf(session, "killed,");
515 87e3e801 2021-07-17 op 
516 e795e935 2022-01-18 op 	fprintf(session, "top=%zu,cur=%zu %s\n", tab.top_line,
517 e795e935 2022-01-18 op 	    tab.current_line, tab.title);
518 c7107cec 2021-04-01 op }
519 c7107cec 2021-04-01 op 
520 c7107cec 2021-04-01 op static void
521 1040cc7f 2021-01-02 op handle_session_tab_hist(struct imsg *imsg, size_t datalen)
522 1040cc7f 2021-01-02 op {
523 1040cc7f 2021-01-02 op 	struct session_tab_hist th;
524 1040cc7f 2021-01-02 op 
525 1040cc7f 2021-01-02 op 	if (session == NULL)
526 1040cc7f 2021-01-02 op 		die();
527 1040cc7f 2021-01-02 op 
528 1040cc7f 2021-01-02 op 	if (datalen != sizeof(th))
529 1040cc7f 2021-01-02 op 		die();
530 1040cc7f 2021-01-02 op 
531 1040cc7f 2021-01-02 op 	memcpy(&th, imsg->data, sizeof(th));
532 1040cc7f 2021-01-02 op 	if (th.uri[sizeof(th.uri)-1] != '\0')
533 1040cc7f 2021-01-02 op 		die();
534 1040cc7f 2021-01-02 op 
535 1040cc7f 2021-01-02 op 	fprintf(session, "%s %s\n", th.future ? ">" : "<", th.uri);
536 1040cc7f 2021-01-02 op }
537 1040cc7f 2021-01-02 op 
538 1040cc7f 2021-01-02 op static void
539 c7107cec 2021-04-01 op handle_session_end(struct imsg *imsg, size_t datalen)
540 c7107cec 2021-04-01 op {
541 c7107cec 2021-04-01 op 	if (session == NULL)
542 c7107cec 2021-04-01 op 		die();
543 c7107cec 2021-04-01 op 	fclose(session);
544 c7107cec 2021-04-01 op 	session = NULL;
545 c7107cec 2021-04-01 op }
546 c7107cec 2021-04-01 op 
547 c7107cec 2021-04-01 op static void
548 1304bbdd 2021-03-15 op handle_dispatch_imsg(int fd, short ev, void *d)
549 35e1f40a 2021-03-14 op {
550 bc10f6a5 2021-07-12 op 	struct imsgev	*iev = d;
551 ea080950 2021-07-20 op 	int		 e;
552 ea080950 2021-07-20 op 
553 ea080950 2021-07-20 op 	if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
554 ea080950 2021-07-20 op 		/*
555 eb2ed626 2021-10-07 op 		 * This should leave a ~/.cache/telescope/crashed file to
556 ea080950 2021-07-20 op 		 * trigger about:crash on next run.  Unfortunately, if
557 ea080950 2021-07-20 op 		 * the main process dies the fs sticks around and
558 ea080950 2021-07-20 op 		 * doesn't notice that the fd was closed.  Why EV_READ
559 ea080950 2021-07-20 op 		 * is not triggered when a fd is closed on the other end?
560 ea080950 2021-07-20 op 		 */
561 ea080950 2021-07-20 op 		e = errno;
562 ea080950 2021-07-20 op 		if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
563 ea080950 2021-07-20 op 		    == -1)
564 ea080950 2021-07-20 op 			err(1, "open");
565 ea080950 2021-07-20 op 		close(fd);
566 ea080950 2021-07-20 op 		errx(1, "connection closed: %s", strerror(e));
567 ea080950 2021-07-20 op 	}
568 35e1f40a 2021-03-14 op }
569 35e1f40a 2021-03-14 op 
570 bc10f6a5 2021-07-12 op static int
571 bc10f6a5 2021-07-12 op fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
572 bc10f6a5 2021-07-12 op     uint16_t datalen)
573 bc10f6a5 2021-07-12 op {
574 bc10f6a5 2021-07-12 op 	return imsg_compose_event(iev_ui, type, peerid, 0, fd,
575 bc10f6a5 2021-07-12 op 	    data, datalen);
576 bc10f6a5 2021-07-12 op }
577 bc10f6a5 2021-07-12 op 
578 eb2ed626 2021-10-07 op static size_t
579 eb2ed626 2021-10-07 op join_path(char *buf, const char *lhs, const char *rhs, size_t buflen)
580 35e1f40a 2021-03-14 op {
581 eb2ed626 2021-10-07 op 	strlcpy(buf, lhs, buflen);
582 eb2ed626 2021-10-07 op 	return strlcat(buf, rhs, buflen);
583 eb2ed626 2021-10-07 op }
584 d0fd368a 2021-07-15 op 
585 eb2ed626 2021-10-07 op static void
586 eb2ed626 2021-10-07 op getenv_default(char *buf, const char *name, const char *def, size_t buflen)
587 eb2ed626 2021-10-07 op {
588 eb2ed626 2021-10-07 op 	size_t ret;
589 eb2ed626 2021-10-07 op 	char *home, *env;
590 740f578b 2021-03-15 op 
591 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
592 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
593 3a227e9a 2021-03-18 op 
594 eb2ed626 2021-10-07 op 	if ((env = getenv(name)) != NULL)
595 eb2ed626 2021-10-07 op 		ret = strlcpy(buf, env, buflen);
596 eb2ed626 2021-10-07 op 	else
597 eb2ed626 2021-10-07 op 		ret = join_path(buf, home, def, buflen);
598 288fd238 2021-04-25 op 
599 eb2ed626 2021-10-07 op 	if (ret >= buflen)
600 eb2ed626 2021-10-07 op 		errx(1, "buffer too small for %s", name);
601 eb2ed626 2021-10-07 op }
602 c7107cec 2021-04-01 op 
603 eb2ed626 2021-10-07 op static void
604 eb2ed626 2021-10-07 op mkdirs(const char *path, mode_t mode)
605 eb2ed626 2021-10-07 op {
606 444dad86 2021-10-07 op 	char copy[PATH_MAX+1], orig[PATH_MAX+1], *parent;
607 ea080950 2021-07-20 op 
608 eb2ed626 2021-10-07 op 	strlcpy(copy, path, sizeof(copy));
609 444dad86 2021-10-07 op 	strlcpy(orig, path, sizeof(orig));
610 eb2ed626 2021-10-07 op 	parent = dirname(copy);
611 eb2ed626 2021-10-07 op 	if (!strcmp(parent, "/"))
612 eb2ed626 2021-10-07 op 		return;
613 eb2ed626 2021-10-07 op 	mkdirs(parent, mode);
614 eb2ed626 2021-10-07 op 
615 444dad86 2021-10-07 op 	if (mkdir(orig, mode) != 0) {
616 eb2ed626 2021-10-07 op 		if (errno == EEXIST)
617 eb2ed626 2021-10-07 op 			return;
618 444dad86 2021-10-07 op 		err(1, "can't mkdir %s", orig);
619 eb2ed626 2021-10-07 op 	}
620 eb2ed626 2021-10-07 op }
621 eb2ed626 2021-10-07 op 
622 eb2ed626 2021-10-07 op static void
623 6c8ddace 2022-01-03 op init_paths(void)
624 eb2ed626 2021-10-07 op {
625 7e60a21a 2022-01-03 op 	char		 xdg_config_base[PATH_MAX];
626 7e60a21a 2022-01-03 op 	char		 xdg_data_base[PATH_MAX];
627 7e60a21a 2022-01-03 op 	char		 xdg_cache_base[PATH_MAX];
628 7e60a21a 2022-01-03 op 	char		 old_path[PATH_MAX];
629 7e60a21a 2022-01-03 op 	char		*home;
630 7e60a21a 2022-01-03 op 	struct stat	 info;
631 eb2ed626 2021-10-07 op 
632 eb2ed626 2021-10-07 op 	/* old path */
633 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
634 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
635 eb2ed626 2021-10-07 op 	join_path(old_path, home, "/.telescope", sizeof(old_path));
636 eb2ed626 2021-10-07 op 
637 eb2ed626 2021-10-07 op 	/* if ~/.telescope exists, use that instead of xdg dirs */
638 eb2ed626 2021-10-07 op 	if (stat(old_path, &info) == 0 && S_ISDIR(info.st_mode)) {
639 eb2ed626 2021-10-07 op 		join_path(config_path_base, home, "/.telescope",
640 eb2ed626 2021-10-07 op 		    sizeof(config_path_base));
641 eb2ed626 2021-10-07 op 		join_path(data_path_base, home, "/.telescope",
642 eb2ed626 2021-10-07 op 		    sizeof(data_path_base));
643 eb2ed626 2021-10-07 op 		join_path(cache_path_base, home, "/.telescope",
644 eb2ed626 2021-10-07 op 		    sizeof(cache_path_base));
645 eb2ed626 2021-10-07 op 		return;
646 eb2ed626 2021-10-07 op 	}
647 eb2ed626 2021-10-07 op 
648 eb2ed626 2021-10-07 op 	/* xdg paths */
649 eb2ed626 2021-10-07 op 	getenv_default(xdg_config_base, "XDG_CONFIG_HOME", "/.config",
650 eb2ed626 2021-10-07 op 	    sizeof(xdg_config_base));
651 eb2ed626 2021-10-07 op 	getenv_default(xdg_data_base, "XDG_DATA_HOME", "/.local/share",
652 eb2ed626 2021-10-07 op 	    sizeof(xdg_data_base));
653 eb2ed626 2021-10-07 op 	getenv_default(xdg_cache_base, "XDG_CACHE_HOME", "/.cache",
654 eb2ed626 2021-10-07 op 	    sizeof(xdg_cache_base));
655 eb2ed626 2021-10-07 op 
656 eb2ed626 2021-10-07 op 	join_path(config_path_base, xdg_config_base, "/telescope",
657 eb2ed626 2021-10-07 op 	    sizeof(config_path_base));
658 eb2ed626 2021-10-07 op 	join_path(data_path_base, xdg_data_base, "/telescope",
659 eb2ed626 2021-10-07 op 	    sizeof(data_path_base));
660 eb2ed626 2021-10-07 op 	join_path(cache_path_base, xdg_cache_base, "/telescope",
661 eb2ed626 2021-10-07 op 	    sizeof(cache_path_base));
662 eb2ed626 2021-10-07 op 
663 eb2ed626 2021-10-07 op 	mkdirs(xdg_config_base, S_IRWXU);
664 eb2ed626 2021-10-07 op 	mkdirs(xdg_data_base, S_IRWXU);
665 eb2ed626 2021-10-07 op 	mkdirs(xdg_cache_base, S_IRWXU);
666 eb2ed626 2021-10-07 op 
667 eb2ed626 2021-10-07 op 	mkdirs(config_path_base, S_IRWXU);
668 eb2ed626 2021-10-07 op 	mkdirs(data_path_base, S_IRWXU);
669 eb2ed626 2021-10-07 op 	mkdirs(cache_path_base, S_IRWXU);
670 eb2ed626 2021-10-07 op }
671 eb2ed626 2021-10-07 op 
672 eb2ed626 2021-10-07 op int
673 eb2ed626 2021-10-07 op fs_init(void)
674 eb2ed626 2021-10-07 op {
675 6c8ddace 2022-01-03 op 	init_paths();
676 eb2ed626 2021-10-07 op 
677 4cf6ba13 2022-02-11 op 	join_path(ctlsock_path, cache_path_base, "/ctl",
678 4cf6ba13 2022-02-11 op 	    sizeof(ctlsock_path));
679 eb2ed626 2021-10-07 op 	join_path(config_path, config_path_base, "/config",
680 eb2ed626 2021-10-07 op 	    sizeof(config_path));
681 eb2ed626 2021-10-07 op 	join_path(lockfile_path, cache_path_base, "/lock",
682 eb2ed626 2021-10-07 op 	    sizeof(lockfile_path));
683 eb2ed626 2021-10-07 op 	join_path(bookmark_file, data_path_base, "/bookmarks.gmi",
684 eb2ed626 2021-10-07 op 	    sizeof(bookmark_file));
685 eb2ed626 2021-10-07 op 	join_path(known_hosts_file, data_path_base, "/known_hosts",
686 eb2ed626 2021-10-07 op 	    sizeof(known_hosts_file));
687 eb2ed626 2021-10-07 op 	join_path(known_hosts_tmp, cache_path_base,
688 eb2ed626 2021-10-07 op 	    "/known_hosts.tmp.XXXXXXXXXX", sizeof(known_hosts_tmp));
689 eb2ed626 2021-10-07 op 	join_path(session_file, cache_path_base, "/session",
690 eb2ed626 2021-10-07 op 	    sizeof(session_file));
691 eb2ed626 2021-10-07 op 	join_path(crashed_file, cache_path_base, "/crashed",
692 eb2ed626 2021-10-07 op 	    sizeof(crashed_file));
693 eb2ed626 2021-10-07 op 
694 3a227e9a 2021-03-18 op 	return 1;
695 3a227e9a 2021-03-18 op }
696 bb28f1c2 2021-12-30 op 
697 bb28f1c2 2021-12-30 op /*
698 bb28f1c2 2021-12-30 op  * Parse a line of the session file.  The format is:
699 bb28f1c2 2021-12-30 op  *
700 bb28f1c2 2021-12-30 op  *	URL [flags,...] [title]\n
701 bb28f1c2 2021-12-30 op  */
702 bb28f1c2 2021-12-30 op static void
703 8f1633da 2022-01-18 op parse_session_line(char *line)
704 bb28f1c2 2021-12-30 op {
705 8f1633da 2022-01-18 op 	struct session_tab tab;
706 bb28f1c2 2021-12-30 op 	char *s, *t, *ap;
707 bb28f1c2 2021-12-30 op 
708 8f1633da 2022-01-18 op 	memset(&tab, 0, sizeof(tab));
709 8f1633da 2022-01-18 op 
710 bb28f1c2 2021-12-30 op 	if ((s = strchr(line, ' ')) == NULL)
711 bb28f1c2 2021-12-30 op 		return;
712 3a227e9a 2021-03-18 op 
713 bb28f1c2 2021-12-30 op 	*s++ = '\0';
714 bb28f1c2 2021-12-30 op 
715 8f1633da 2022-01-18 op 	if (strlcpy(tab.uri, line, sizeof(tab.uri)) >= sizeof(tab.uri))
716 8f1633da 2022-01-18 op 		return;
717 8f1633da 2022-01-18 op 
718 bb28f1c2 2021-12-30 op 	if ((t = strchr(s, ' ')) != NULL) {
719 bb28f1c2 2021-12-30 op 		*t++ = '\0';
720 8f1633da 2022-01-18 op 
721 8f1633da 2022-01-18 op 		/* don't worry about cached title truncation */
722 8f1633da 2022-01-18 op 		strlcpy(tab.title, t, sizeof(tab.title));
723 bb28f1c2 2021-12-30 op 	}
724 bb28f1c2 2021-12-30 op 
725 bb28f1c2 2021-12-30 op 	while ((ap = strsep(&s, ",")) != NULL) {
726 bb28f1c2 2021-12-30 op 		if (!strcmp(ap, "current"))
727 8f1633da 2022-01-18 op 			tab.flags |= TAB_CURRENT;
728 6c74799d 2022-01-05 op 		else if (!strcmp(ap, "killed"))
729 8f1633da 2022-01-18 op 			tab.flags |= TAB_KILLED;
730 e795e935 2022-01-18 op 		else if (has_prefix(ap, "top="))
731 4aaf5de0 2022-01-18 op 			tab.top_line = strtonum(ap+4, 0, UINT32_MAX, NULL);
732 e795e935 2022-01-18 op 		else if (has_prefix(ap, "cur="))
733 4aaf5de0 2022-01-18 op 			tab.current_line = strtonum(ap+4, 0, UINT32_MAX, NULL);
734 bb28f1c2 2021-12-30 op 	}
735 bb28f1c2 2021-12-30 op 
736 e795e935 2022-01-18 op 	if (tab.top_line > tab.current_line) {
737 e795e935 2022-01-18 op 		tab.top_line = 0;
738 e795e935 2022-01-18 op 		tab.current_line = 0;
739 e795e935 2022-01-18 op 	}
740 e795e935 2022-01-18 op 
741 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_TAB, 0, -1, &tab, sizeof(tab));
742 1040cc7f 2021-01-02 op }
743 1040cc7f 2021-01-02 op 
744 1040cc7f 2021-01-02 op static inline void
745 1040cc7f 2021-01-02 op sendhist(const char *uri, int future)
746 1040cc7f 2021-01-02 op {
747 1040cc7f 2021-01-02 op 	struct session_tab_hist sth;
748 1040cc7f 2021-01-02 op 
749 1040cc7f 2021-01-02 op 	memset(&sth, 0, sizeof(sth));
750 1040cc7f 2021-01-02 op 	sth.future = future;
751 1040cc7f 2021-01-02 op 
752 1040cc7f 2021-01-02 op 	if (strlcpy(sth.uri, uri, sizeof(sth.uri)) >= sizeof(sth.uri))
753 1040cc7f 2021-01-02 op 		return;
754 1040cc7f 2021-01-02 op 
755 1040cc7f 2021-01-02 op 	fs_send_ui(IMSG_SESSION_TAB_HIST, 0, -1, &sth, sizeof(sth));
756 bb28f1c2 2021-12-30 op }
757 bb28f1c2 2021-12-30 op 
758 bb28f1c2 2021-12-30 op static void
759 50f03682 2022-01-03 op load_last_session(void)
760 bb28f1c2 2021-12-30 op {
761 bb28f1c2 2021-12-30 op 	FILE		*session;
762 bb28f1c2 2021-12-30 op 	size_t		 linesize = 0;
763 bb28f1c2 2021-12-30 op 	ssize_t		 linelen;
764 bb28f1c2 2021-12-30 op 	int		 first_time = 0;
765 1040cc7f 2021-01-02 op 	int		 future;
766 1040cc7f 2021-01-02 op 	char		*nl, *s, *line = NULL;
767 bb28f1c2 2021-12-30 op 
768 bb28f1c2 2021-12-30 op 	if ((session = fopen(session_file, "r")) == NULL) {
769 bb28f1c2 2021-12-30 op 		/* first time? */
770 bb28f1c2 2021-12-30 op 		first_time = 1;
771 bb28f1c2 2021-12-30 op 		goto end;
772 bb28f1c2 2021-12-30 op 	}
773 bb28f1c2 2021-12-30 op 
774 bb28f1c2 2021-12-30 op 	while ((linelen = getline(&line, &linesize, session)) != -1) {
775 bb28f1c2 2021-12-30 op 		if ((nl = strchr(line, '\n')) != NULL)
776 bb28f1c2 2021-12-30 op 			*nl = '\0';
777 1040cc7f 2021-01-02 op 
778 1040cc7f 2021-01-02 op 		if (*line == '<' || *line == '>') {
779 1040cc7f 2021-01-02 op 			future = *line == '>';
780 1040cc7f 2021-01-02 op 			s = line+1;
781 1040cc7f 2021-01-02 op 			if (*s != ' ')
782 1040cc7f 2021-01-02 op 				continue;
783 1040cc7f 2021-01-02 op 			sendhist(++s, future);
784 1040cc7f 2021-01-02 op 		} else {
785 8f1633da 2022-01-18 op 			parse_session_line(line);
786 1040cc7f 2021-01-02 op 		}
787 bb28f1c2 2021-12-30 op 	}
788 bb28f1c2 2021-12-30 op 
789 bb28f1c2 2021-12-30 op 	fclose(session);
790 bb28f1c2 2021-12-30 op 	free(line);
791 bb28f1c2 2021-12-30 op 
792 8f1633da 2022-01-18 op 	if (last_time_crashed()) {
793 8f1633da 2022-01-18 op 		struct session_tab tab;
794 8f1633da 2022-01-18 op 		memset(&tab, 0, sizeof(tab));
795 8f1633da 2022-01-18 op 		tab.flags = TAB_CURRENT;
796 8f1633da 2022-01-18 op 		strlcpy(tab.uri, "about:crash", sizeof(tab.uri));
797 8f1633da 2022-01-18 op 		fs_send_ui(IMSG_SESSION_TAB, 0, -1, &tab, sizeof(tab));
798 8f1633da 2022-01-18 op 	}
799 bb28f1c2 2021-12-30 op 
800 bb28f1c2 2021-12-30 op end:
801 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_END, 0, -1, &first_time, sizeof(first_time));
802 bb28f1c2 2021-12-30 op }
803 bb28f1c2 2021-12-30 op 
804 3a227e9a 2021-03-18 op int
805 6cc5fcfe 2021-07-08 op fs_main(void)
806 3a227e9a 2021-03-18 op {
807 6cc5fcfe 2021-07-08 op 	setproctitle("fs");
808 3a227e9a 2021-03-18 op 
809 6cc5fcfe 2021-07-08 op 	fs_init();
810 6cc5fcfe 2021-07-08 op 
811 35e1f40a 2021-03-14 op 	event_init();
812 35e1f40a 2021-03-14 op 
813 bc10f6a5 2021-07-12 op 	/* Setup pipe and event handler to the main process */
814 bc10f6a5 2021-07-12 op 	if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
815 6cc5fcfe 2021-07-08 op 		die();
816 bc10f6a5 2021-07-12 op 	imsg_init(&iev_ui->ibuf, 3);
817 bc10f6a5 2021-07-12 op 	iev_ui->handler = handle_dispatch_imsg;
818 bc10f6a5 2021-07-12 op 	iev_ui->events = EV_READ;
819 bc10f6a5 2021-07-12 op 	event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
820 bc10f6a5 2021-07-12 op 	    iev_ui->handler, iev_ui);
821 bc10f6a5 2021-07-12 op 	event_add(&iev_ui->ev, NULL);
822 35e1f40a 2021-03-14 op 
823 35e1f40a 2021-03-14 op 	sandbox_fs_process();
824 35e1f40a 2021-03-14 op 
825 35e1f40a 2021-03-14 op 	event_dispatch();
826 35e1f40a 2021-03-14 op 	return 0;
827 35e1f40a 2021-03-14 op }
828 3a227e9a 2021-03-18 op 
829 be97d6e6 2021-08-15 op /*
830 be97d6e6 2021-08-15 op  * Check if the last time telescope crashed.  The check is done by
831 be97d6e6 2021-08-15 op  * looking at `crashed_file': if it exists then last time we crashed.
832 be97d6e6 2021-08-15 op  * Then, while here, touch the file too.  During IMSG_QUIT we'll
833 be97d6e6 2021-08-15 op  * remove it.
834 be97d6e6 2021-08-15 op  */
835 83ed72f1 2022-01-03 op static int
836 b6171794 2021-07-20 op last_time_crashed(void)
837 b6171794 2021-07-20 op {
838 be97d6e6 2021-08-15 op 	int fd, crashed = 1;
839 b6171794 2021-07-20 op 
840 2b409042 2021-09-15 op 	if (safe_mode)
841 2b409042 2021-09-15 op 		return 0;
842 2b409042 2021-09-15 op 
843 be97d6e6 2021-08-15 op 	if (unlink(crashed_file) == -1 && errno == ENOENT)
844 be97d6e6 2021-08-15 op 		crashed = 0;
845 be97d6e6 2021-08-15 op 
846 be97d6e6 2021-08-15 op 	if ((fd = open(crashed_file, O_CREAT|O_WRONLY, 0600)) == -1)
847 be97d6e6 2021-08-15 op 		return crashed;
848 b6171794 2021-07-20 op 	close(fd);
849 be97d6e6 2021-08-15 op 
850 be97d6e6 2021-08-15 op 	return crashed;
851 b6171794 2021-07-20 op }
852 b6171794 2021-07-20 op 
853 b6171794 2021-07-20 op int
854 d0fd368a 2021-07-15 op lock_session(void)
855 d0fd368a 2021-07-15 op {
856 d0fd368a 2021-07-15 op 	struct flock	lock;
857 d0fd368a 2021-07-15 op 	int		fd;
858 d0fd368a 2021-07-15 op 
859 d0fd368a 2021-07-15 op 	if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
860 d0fd368a 2021-07-15 op 		return -1;
861 d0fd368a 2021-07-15 op 
862 d0fd368a 2021-07-15 op 	lock.l_start = 0;
863 d0fd368a 2021-07-15 op 	lock.l_len = 0;
864 d0fd368a 2021-07-15 op 	lock.l_type = F_WRLCK;
865 d0fd368a 2021-07-15 op 	lock.l_whence = SEEK_SET;
866 c6d03cf5 2021-04-25 op 
867 d0fd368a 2021-07-15 op 	if (fcntl(fd, F_SETLK, &lock) == -1) {
868 d0fd368a 2021-07-15 op 		close(fd);
869 d0fd368a 2021-07-15 op 		return -1;
870 d0fd368a 2021-07-15 op 	}
871 d0fd368a 2021-07-15 op 
872 d0fd368a 2021-07-15 op 	return fd;
873 d0fd368a 2021-07-15 op }
874 d0fd368a 2021-07-15 op 
875 6400962b 2022-01-03 op static inline int
876 c6d03cf5 2021-04-25 op parse_khost_line(char *line, char *tmp[3])
877 c6d03cf5 2021-04-25 op {
878 c6d03cf5 2021-04-25 op 	char **ap;
879 c6d03cf5 2021-04-25 op 
880 c6d03cf5 2021-04-25 op 	for (ap = tmp; ap < &tmp[3] &&
881 c6d03cf5 2021-04-25 op 	    (*ap = strsep(&line, " \t\n")) != NULL;) {
882 c6d03cf5 2021-04-25 op 		if (**ap != '\0')
883 c6d03cf5 2021-04-25 op 			ap++;
884 c6d03cf5 2021-04-25 op 	}
885 3a227e9a 2021-03-18 op 
886 c6d03cf5 2021-04-25 op 	return ap == &tmp[3] && *line == '\0';
887 c6d03cf5 2021-04-25 op }
888 c6d03cf5 2021-04-25 op 
889 eb722b50 2022-01-03 op static void
890 eb722b50 2022-01-03 op load_certs(void)
891 3a227e9a 2021-03-18 op {
892 c6d03cf5 2021-04-25 op 	char		*tmp[3], *line = NULL;
893 6cd6a9e1 2021-03-20 op 	const char	*errstr;
894 ec1fa0b0 2021-04-25 op 	size_t		 lineno = 0, linesize = 0;
895 3a227e9a 2021-03-18 op 	ssize_t		 linelen;
896 3a227e9a 2021-03-18 op 	FILE		*f;
897 eb722b50 2022-01-03 op 	struct tofu_entry e;
898 3a227e9a 2021-03-18 op 
899 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "r")) == NULL)
900 eb722b50 2022-01-03 op 		return;
901 3a227e9a 2021-03-18 op 
902 3a227e9a 2021-03-18 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
903 ec1fa0b0 2021-04-25 op 		lineno++;
904 3a227e9a 2021-03-18 op 
905 eb722b50 2022-01-03 op 		memset(&e, 0, sizeof(e));
906 eb722b50 2022-01-03 op 		if (parse_khost_line(line, tmp)) {
907 eb722b50 2022-01-03 op 			strlcpy(e.domain, tmp[0], sizeof(e.domain));
908 eb722b50 2022-01-03 op 			strlcpy(e.hash, tmp[1], sizeof(e.hash));
909 3a227e9a 2021-03-18 op 
910 eb722b50 2022-01-03 op 			e.verified = strtonum(tmp[2], 0, 1, &errstr);
911 c6d03cf5 2021-04-25 op 			if (errstr != NULL)
912 c6d03cf5 2021-04-25 op 				errx(1, "%s:%zu verification for %s is %s: %s",
913 c6d03cf5 2021-04-25 op 				    known_hosts_file, lineno,
914 eb722b50 2022-01-03 op 				    e.domain, errstr, tmp[2]);
915 eb722b50 2022-01-03 op 
916 eb722b50 2022-01-03 op 			fs_send_ui(IMSG_TOFU, 0, -1, &e, sizeof(e));
917 c6d03cf5 2021-04-25 op 		} else {
918 ec1fa0b0 2021-04-25 op 			warnx("%s:%zu invalid entry",
919 ec1fa0b0 2021-04-25 op 			    known_hosts_file, lineno);
920 c6d03cf5 2021-04-25 op 		}
921 3a227e9a 2021-03-18 op 	}
922 3a227e9a 2021-03-18 op 
923 3a227e9a 2021-03-18 op 	free(line);
924 eb722b50 2022-01-03 op 	fclose(f);
925 eb722b50 2022-01-03 op 	return;
926 3a227e9a 2021-03-18 op }
927 c7107cec 2021-04-01 op