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