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 35e1f40a 2021-03-14 op 
 41 35e1f40a 2021-03-14 op static void		 die(void) __attribute__((__noreturn__));
 42 fb4dc49f 2021-08-13 op static void		 send_file(uint32_t, FILE *);
 43 35e1f40a 2021-03-14 op static void		 handle_get(struct imsg*, size_t);
 44 5cbe1763 2021-08-13 op static int		 select_non_dot(const struct dirent *);
 45 5cbe1763 2021-08-13 op static int		 select_non_dotdot(const struct dirent *);
 46 fb4dc49f 2021-08-13 op static void		 handle_get_file(struct imsg*, size_t);
 47 50f03682 2022-01-03 op static void		 handle_misc(struct imsg *, size_t);
 48 740f578b 2021-03-15 op static void		 handle_bookmark_page(struct imsg*, size_t);
 49 3a227e9a 2021-03-18 op static void		 handle_save_cert(struct imsg*, size_t);
 50 288fd238 2021-04-25 op static void		 handle_update_cert(struct imsg*, size_t);
 51 de2a69bb 2021-05-17 op static void		 handle_file_open(struct imsg*, size_t);
 52 c7107cec 2021-04-01 op static void		 handle_session_start(struct imsg*, size_t);
 53 c7107cec 2021-04-01 op static void		 handle_session_tab(struct imsg*, size_t);
 54 1040cc7f 2021-01-02 op static void		 handle_session_tab_hist(struct imsg*, size_t);
 55 c7107cec 2021-04-01 op static void		 handle_session_end(struct imsg*, size_t);
 56 1304bbdd 2021-03-15 op static void		 handle_dispatch_imsg(int, short, void*);
 57 bc10f6a5 2021-07-12 op static int		 fs_send_ui(int, uint32_t, int, const void *, uint16_t);
 58 eb2ed626 2021-10-07 op static size_t		 join_path(char*, const char*, const char*, size_t);
 59 eb2ed626 2021-10-07 op static void		 getenv_default(char*, const char*, const char*, size_t);
 60 eb2ed626 2021-10-07 op static void		 mkdirs(const char*, mode_t);
 61 eb2ed626 2021-10-07 op static void		 xdg_init(void);
 62 50f03682 2022-01-03 op static void		 load_last_session(void);
 63 eb722b50 2022-01-03 op static void		 load_certs(void);
 64 35e1f40a 2021-03-14 op 
 65 bc10f6a5 2021-07-12 op static struct imsgev		*iev_ui;
 66 c7107cec 2021-04-01 op static FILE			*session;
 67 c7107cec 2021-04-01 op 
 68 f88fbabc 2021-11-27 op /*
 69 f88fbabc 2021-11-27 op  * Note: these are empty if ~/.telescope exists, use *_path_base
 70 f88fbabc 2021-11-27 op  * below.
 71 f88fbabc 2021-11-27 op  */
 72 eb2ed626 2021-10-07 op static char	xdg_config_base[PATH_MAX];
 73 eb2ed626 2021-10-07 op static char	xdg_data_base[PATH_MAX];
 74 eb2ed626 2021-10-07 op static char	xdg_cache_base[PATH_MAX];
 75 eb2ed626 2021-10-07 op 
 76 f88fbabc 2021-11-27 op /*
 77 f88fbabc 2021-11-27 op  * Where to store user data.  These are all equal to ~/.telescope if
 78 f88fbabc 2021-11-27 op  * it exists.
 79 f88fbabc 2021-11-27 op  */
 80 fb3d08c1 2021-10-07 op char		config_path_base[PATH_MAX];
 81 fb3d08c1 2021-10-07 op char		data_path_base[PATH_MAX];
 82 fb3d08c1 2021-10-07 op char		cache_path_base[PATH_MAX];
 83 eb2ed626 2021-10-07 op 
 84 eb2ed626 2021-10-07 op char		config_path[PATH_MAX];
 85 fb3d08c1 2021-10-07 op char		lockfile_path[PATH_MAX];
 86 fb3d08c1 2021-10-07 op char		bookmark_file[PATH_MAX];
 87 fb3d08c1 2021-10-07 op char		known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
 88 fb3d08c1 2021-10-07 op char		crashed_file[PATH_MAX];
 89 fb3d08c1 2021-10-07 op char		session_file[PATH_MAX];
 90 740f578b 2021-03-15 op 
 91 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
 92 35e1f40a 2021-03-14 op 	[IMSG_GET] = handle_get,
 93 fb4dc49f 2021-08-13 op 	[IMSG_GET_FILE] = handle_get_file,
 94 50f03682 2022-01-03 op 	[IMSG_QUIT] = handle_misc,
 95 50f03682 2022-01-03 op 	[IMSG_INIT] = handle_misc,
 96 740f578b 2021-03-15 op 	[IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
 97 3a227e9a 2021-03-18 op 	[IMSG_SAVE_CERT] = handle_save_cert,
 98 288fd238 2021-04-25 op 	[IMSG_UPDATE_CERT] = handle_update_cert,
 99 de2a69bb 2021-05-17 op 	[IMSG_FILE_OPEN] = handle_file_open,
100 c7107cec 2021-04-01 op 	[IMSG_SESSION_START] = handle_session_start,
101 c7107cec 2021-04-01 op 	[IMSG_SESSION_TAB] = handle_session_tab,
102 1040cc7f 2021-01-02 op 	[IMSG_SESSION_TAB_HIST] = handle_session_tab_hist,
103 c7107cec 2021-04-01 op 	[IMSG_SESSION_END] = handle_session_end,
104 35e1f40a 2021-03-14 op };
105 35e1f40a 2021-03-14 op 
106 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
107 35e1f40a 2021-03-14 op die(void)
108 35e1f40a 2021-03-14 op {
109 35e1f40a 2021-03-14 op 	abort(); 		/* TODO */
110 35e1f40a 2021-03-14 op }
111 35e1f40a 2021-03-14 op 
112 35e1f40a 2021-03-14 op static void
113 fb4dc49f 2021-08-13 op send_file(uint32_t peerid, FILE *f)
114 fb4dc49f 2021-08-13 op {
115 fb4dc49f 2021-08-13 op 	ssize_t	 r;
116 fb4dc49f 2021-08-13 op 	char	 buf[BUFSIZ];
117 fb4dc49f 2021-08-13 op 
118 fb4dc49f 2021-08-13 op 	for (;;) {
119 fb4dc49f 2021-08-13 op 		r = fread(buf, 1, sizeof(buf), f);
120 fb4dc49f 2021-08-13 op 		if (r != 0)
121 fb4dc49f 2021-08-13 op 			fs_send_ui(IMSG_BUF, peerid, -1, buf, r);
122 fb4dc49f 2021-08-13 op 		if (r != sizeof(buf))
123 fb4dc49f 2021-08-13 op 			break;
124 fb4dc49f 2021-08-13 op 	}
125 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
126 fb4dc49f 2021-08-13 op 	fclose(f);
127 fb4dc49f 2021-08-13 op }
128 fb4dc49f 2021-08-13 op 
129 fb4dc49f 2021-08-13 op static void
130 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
131 35e1f40a 2021-03-14 op {
132 56e7efb4 2021-07-21 op 	const char	*bpath = "bookmarks.gmi";
133 fb4dc49f 2021-08-13 op 	char		 path[PATH_MAX];
134 56e7efb4 2021-07-21 op 	FILE		*f;
135 a2728733 2021-07-18 op 	const char	*data, *p;
136 a2728733 2021-07-18 op 	size_t		 i;
137 a2728733 2021-07-18 op 	struct page {
138 a2728733 2021-07-18 op 		const char	*name;
139 56e7efb4 2021-07-21 op 		const char	*path;
140 a2728733 2021-07-18 op 		const uint8_t	*data;
141 a2728733 2021-07-18 op 		size_t		 len;
142 a2728733 2021-07-18 op 	} pages[] = {
143 56e7efb4 2021-07-21 op 		{"about",	NULL,	about_about,	about_about_len},
144 56e7efb4 2021-07-21 op 		{"blank",	NULL,	about_blank,	about_blank_len},
145 56e7efb4 2021-07-21 op 		{"bookmarks",	bpath,	bookmarks,	bookmarks_len},
146 56e7efb4 2021-07-21 op 		{"crash",	NULL,	about_crash,	about_crash_len},
147 56e7efb4 2021-07-21 op 		{"help",	NULL,	about_help,	about_help_len},
148 56e7efb4 2021-07-21 op 		{"license",	NULL,	about_license,	about_license_len},
149 56e7efb4 2021-07-21 op 		{"new",		NULL,	about_new,	about_new_len},
150 56e7efb4 2021-07-21 op 	}, *page = NULL;
151 35e1f40a 2021-03-14 op 
152 35e1f40a 2021-03-14 op 	data = imsg->data;
153 56e7efb4 2021-07-21 op 	if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
154 35e1f40a 2021-03-14 op 		die();
155 56e7efb4 2021-07-21 op 	if ((data = strchr(data, ':')) == NULL)
156 56e7efb4 2021-07-21 op 		goto notfound;
157 56e7efb4 2021-07-21 op 	data++;
158 35e1f40a 2021-03-14 op 
159 56e7efb4 2021-07-21 op 	for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
160 56e7efb4 2021-07-21 op 		if (!strcmp(data, pages[i].name)) {
161 56e7efb4 2021-07-21 op 			page = &pages[i];
162 56e7efb4 2021-07-21 op 			break;
163 56e7efb4 2021-07-21 op 		}
164 56e7efb4 2021-07-21 op 
165 56e7efb4 2021-07-21 op 	if (page == NULL)
166 56e7efb4 2021-07-21 op 		goto notfound;
167 56e7efb4 2021-07-21 op 
168 de04b178 2021-11-26 op 	strlcpy(path, data_path_base, sizeof(path));
169 56e7efb4 2021-07-21 op 	strlcat(path, "/", sizeof(path));
170 56e7efb4 2021-07-21 op 	if (page->path != NULL)
171 56e7efb4 2021-07-21 op 		strlcat(path, page->path, sizeof(path));
172 56e7efb4 2021-07-21 op 	else {
173 56e7efb4 2021-07-21 op 		strlcat(path, "pages/about_", sizeof(path));
174 56e7efb4 2021-07-21 op 		strlcat(path, page->name, sizeof(path));
175 56e7efb4 2021-07-21 op 		strlcat(path, ".gmi", sizeof(path));
176 56e7efb4 2021-07-21 op 	}
177 56e7efb4 2021-07-21 op 
178 56e7efb4 2021-07-21 op 	if ((f = fopen(path, "r")) == NULL) {
179 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
180 56e7efb4 2021-07-21 op 		    page->data, page->len);
181 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
182 56e7efb4 2021-07-21 op 		    NULL, 0);
183 a2728733 2021-07-18 op 		return;
184 35e1f40a 2021-03-14 op 	}
185 a2728733 2021-07-18 op 
186 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
187 56e7efb4 2021-07-21 op 	return;
188 56e7efb4 2021-07-21 op 
189 56e7efb4 2021-07-21 op notfound:
190 a2728733 2021-07-18 op 	p = "# not found!\n";
191 a2728733 2021-07-18 op 	fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
192 a2728733 2021-07-18 op 	fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
193 fb4dc49f 2021-08-13 op }
194 fb4dc49f 2021-08-13 op 
195 fb4dc49f 2021-08-13 op static inline void
196 fb4dc49f 2021-08-13 op send_hdr(uint32_t peerid, int code, const char *meta)
197 fb4dc49f 2021-08-13 op {
198 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_CODE, peerid, -1, &code, sizeof(code));
199 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_META, peerid, -1, meta, strlen(meta)+1);
200 fb4dc49f 2021-08-13 op }
201 fb4dc49f 2021-08-13 op 
202 24a68158 2021-08-13 op static inline void
203 24a68158 2021-08-13 op send_errno(uint32_t peerid, int code, const char *str, int no)
204 24a68158 2021-08-13 op {
205 24a68158 2021-08-13 op 	char *s;
206 24a68158 2021-08-13 op 
207 24a68158 2021-08-13 op 	if (asprintf(&s, "%s: %s", str, strerror(no)) == -1)
208 24a68158 2021-08-13 op 		s = NULL;
209 24a68158 2021-08-13 op 
210 24a68158 2021-08-13 op 	send_hdr(peerid, code, s == NULL ? str : s);
211 24a68158 2021-08-13 op 	free(s);
212 24a68158 2021-08-13 op }
213 24a68158 2021-08-13 op 
214 65124267 2021-08-13 op static inline const char *
215 65124267 2021-08-13 op file_type(const char *path)
216 fb4dc49f 2021-08-13 op {
217 fb4dc49f 2021-08-13 op 	struct mapping {
218 fb4dc49f 2021-08-13 op 		const char	*ext;
219 fb4dc49f 2021-08-13 op 		const char	*mime;
220 fb4dc49f 2021-08-13 op 	} ms[] = {
221 fb4dc49f 2021-08-13 op 		{"diff",	"text/x-patch"},
222 fb4dc49f 2021-08-13 op 		{"gemini",	"text/gemini"},
223 fb4dc49f 2021-08-13 op 		{"gmi",		"text/gemini"},
224 fb4dc49f 2021-08-13 op 		{"markdown",	"text/plain"},
225 fb4dc49f 2021-08-13 op 		{"md",		"text/plain"},
226 fb4dc49f 2021-08-13 op 		{"patch",	"text/x-patch"},
227 fb4dc49f 2021-08-13 op 		{"txt",		"text/plain"},
228 fb4dc49f 2021-08-13 op 		{NULL, NULL},
229 65124267 2021-08-13 op 	}, *m;
230 65124267 2021-08-13 op 	char *dot;
231 65124267 2021-08-13 op 
232 65124267 2021-08-13 op 	if ((dot = strrchr(path, '.')) == NULL)
233 65124267 2021-08-13 op 		return NULL;
234 65124267 2021-08-13 op 
235 65124267 2021-08-13 op 	dot++;
236 65124267 2021-08-13 op 
237 65124267 2021-08-13 op 	for (m = ms; m->ext != NULL; ++m)
238 65124267 2021-08-13 op 		if (!strcmp(m->ext, dot))
239 65124267 2021-08-13 op 			return m->mime;
240 65124267 2021-08-13 op 
241 65124267 2021-08-13 op 	return NULL;
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_dot(const struct dirent *d)
246 5cbe1763 2021-08-13 op {
247 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".");
248 5cbe1763 2021-08-13 op }
249 5cbe1763 2021-08-13 op 
250 5cbe1763 2021-08-13 op static int
251 5cbe1763 2021-08-13 op select_non_dotdot(const struct dirent *d)
252 5cbe1763 2021-08-13 op {
253 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".") && strcmp(d->d_name, "..");
254 65124267 2021-08-13 op }
255 65124267 2021-08-13 op 
256 65124267 2021-08-13 op static inline void
257 65124267 2021-08-13 op send_dir(uint32_t peerid, const char *path)
258 65124267 2021-08-13 op {
259 65124267 2021-08-13 op 	struct dirent	**names;
260 65124267 2021-08-13 op 	struct evbuffer	 *ev;
261 5d43215b 2021-08-13 op 	char		 *s;
262 5cbe1763 2021-08-13 op 	int		(*selector)(const struct dirent *) = select_non_dot;
263 24a68158 2021-08-13 op 	int		  i, len, no;
264 65124267 2021-08-13 op 
265 5d43215b 2021-08-13 op 	if (!has_suffix(path, "/")) {
266 5d43215b 2021-08-13 op 		if (asprintf(&s, "%s/", path) == -1)
267 5d43215b 2021-08-13 op 			die();
268 5d43215b 2021-08-13 op 		send_hdr(peerid, 30, s);
269 5d43215b 2021-08-13 op 		free(s);
270 5d43215b 2021-08-13 op 		return;
271 5d43215b 2021-08-13 op 	}
272 5d43215b 2021-08-13 op 
273 5cbe1763 2021-08-13 op 	if (!strcmp(path, "/"))
274 5cbe1763 2021-08-13 op 		selector = select_non_dotdot;
275 5cbe1763 2021-08-13 op 
276 65124267 2021-08-13 op 	if ((ev = evbuffer_new()) == NULL ||
277 5cbe1763 2021-08-13 op 	    (len = scandir(path, &names, selector, alphasort)) == -1) {
278 24a68158 2021-08-13 op 		no = errno;
279 65124267 2021-08-13 op 		evbuffer_free(ev);
280 24a68158 2021-08-13 op 		send_errno(peerid, 40, "failure reading the directory", no);
281 65124267 2021-08-13 op 		return;
282 65124267 2021-08-13 op 	}
283 65124267 2021-08-13 op 
284 65124267 2021-08-13 op 	evbuffer_add_printf(ev, "# Index of %s\n\n", path);
285 65124267 2021-08-13 op 	for (i = 0; i < len; ++i) {
286 65124267 2021-08-13 op 		evbuffer_add_printf(ev, "=> %s", names[i]->d_name);
287 65124267 2021-08-13 op 		if (names[i]->d_type == DT_DIR)
288 65124267 2021-08-13 op 			evbuffer_add(ev, "/", 1);
289 65124267 2021-08-13 op 		evbuffer_add(ev, "\n", 1);
290 65124267 2021-08-13 op 	}
291 65124267 2021-08-13 op 
292 65124267 2021-08-13 op 	send_hdr(peerid, 20, "text/gemini");
293 65124267 2021-08-13 op 	fs_send_ui(IMSG_BUF, peerid, -1,
294 65124267 2021-08-13 op 	    EVBUFFER_DATA(ev), EVBUFFER_LENGTH(ev));
295 65124267 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
296 65124267 2021-08-13 op 
297 65124267 2021-08-13 op 	evbuffer_free(ev);
298 65124267 2021-08-13 op 	free(names);
299 65124267 2021-08-13 op }
300 65124267 2021-08-13 op 
301 65124267 2021-08-13 op static void
302 65124267 2021-08-13 op handle_get_file(struct imsg *imsg, size_t datalen)
303 65124267 2021-08-13 op {
304 65124267 2021-08-13 op 	struct stat	 sb;
305 fb4dc49f 2021-08-13 op 	FILE		*f;
306 65124267 2021-08-13 op 	char		*data;
307 fb4dc49f 2021-08-13 op 	const char	*meta = NULL;
308 fb4dc49f 2021-08-13 op 
309 fb4dc49f 2021-08-13 op 	data = imsg->data;
310 fb4dc49f 2021-08-13 op 	data[datalen-1] = '\0';
311 fb4dc49f 2021-08-13 op 
312 65124267 2021-08-13 op 	if ((f = fopen(data, "r")) == NULL) {
313 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 51, "can't open", errno);
314 fb4dc49f 2021-08-13 op 		return;
315 fb4dc49f 2021-08-13 op 	}
316 fb4dc49f 2021-08-13 op 
317 65124267 2021-08-13 op 	if (fstat(fileno(f), &sb) == -1) {
318 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 40, "fstat", errno);
319 65124267 2021-08-13 op 		return;
320 fb4dc49f 2021-08-13 op 	}
321 fb4dc49f 2021-08-13 op 
322 65124267 2021-08-13 op 	if (S_ISDIR(sb.st_mode)) {
323 65124267 2021-08-13 op 		fclose(f);
324 65124267 2021-08-13 op 		send_dir(imsg->hdr.peerid, data);
325 fb4dc49f 2021-08-13 op 		return;
326 fb4dc49f 2021-08-13 op 	}
327 fb4dc49f 2021-08-13 op 
328 65124267 2021-08-13 op 	if ((meta = file_type(data)) == NULL) {
329 65124267 2021-08-13 op 		fclose(f);
330 65124267 2021-08-13 op 		send_hdr(imsg->hdr.peerid, 51,
331 65124267 2021-08-13 op 		    "don't know how to visualize this file");
332 fb4dc49f 2021-08-13 op 		return;
333 fb4dc49f 2021-08-13 op 	}
334 fb4dc49f 2021-08-13 op 
335 fb4dc49f 2021-08-13 op 	send_hdr(imsg->hdr.peerid, 20, meta);
336 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
337 35e1f40a 2021-03-14 op }
338 35e1f40a 2021-03-14 op 
339 35e1f40a 2021-03-14 op static void
340 50f03682 2022-01-03 op handle_misc(struct imsg *imsg, size_t datalen)
341 50f03682 2022-01-03 op {
342 50f03682 2022-01-03 op 	switch (imsg->hdr.type) {
343 50f03682 2022-01-03 op 	case IMSG_INIT:
344 eb722b50 2022-01-03 op 		load_certs();
345 50f03682 2022-01-03 op 		load_last_session();
346 50f03682 2022-01-03 op 		break;
347 be97d6e6 2021-08-15 op 
348 50f03682 2022-01-03 op 	case IMSG_QUIT:
349 50f03682 2022-01-03 op 		if (!safe_mode)
350 50f03682 2022-01-03 op 			unlink(crashed_file);
351 50f03682 2022-01-03 op 		event_loopbreak();
352 50f03682 2022-01-03 op 		break;
353 50f03682 2022-01-03 op 
354 50f03682 2022-01-03 op 	default:
355 50f03682 2022-01-03 op 		die();
356 50f03682 2022-01-03 op 	}
357 35e1f40a 2021-03-14 op }
358 35e1f40a 2021-03-14 op 
359 35e1f40a 2021-03-14 op static void
360 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
361 740f578b 2021-03-15 op {
362 740f578b 2021-03-15 op 	char	*data;
363 740f578b 2021-03-15 op 	int	 res;
364 740f578b 2021-03-15 op 	FILE	*f;
365 740f578b 2021-03-15 op 
366 740f578b 2021-03-15 op 	data = imsg->data;
367 740f578b 2021-03-15 op 	if (data[datalen-1] != '\0')
368 740f578b 2021-03-15 op 		die();
369 740f578b 2021-03-15 op 
370 740f578b 2021-03-15 op 	if ((f = fopen(bookmark_file, "a")) == NULL) {
371 740f578b 2021-03-15 op 		res = errno;
372 740f578b 2021-03-15 op 		goto end;
373 740f578b 2021-03-15 op 	}
374 740f578b 2021-03-15 op 	fprintf(f, "=> %s\n", data);
375 740f578b 2021-03-15 op 	fclose(f);
376 740f578b 2021-03-15 op 
377 740f578b 2021-03-15 op 	res = 0;
378 740f578b 2021-03-15 op end:
379 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
380 740f578b 2021-03-15 op }
381 740f578b 2021-03-15 op 
382 740f578b 2021-03-15 op static void
383 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
384 3a227e9a 2021-03-18 op {
385 3a227e9a 2021-03-18 op 	struct tofu_entry	 e;
386 3a227e9a 2021-03-18 op 	FILE			*f;
387 3a227e9a 2021-03-18 op 	int			 res;
388 3a227e9a 2021-03-18 op 
389 3a227e9a 2021-03-18 op 	/* TODO: traverse the file to avoid duplications? */
390 3a227e9a 2021-03-18 op 
391 3a227e9a 2021-03-18 op 	if (datalen != sizeof(e))
392 3a227e9a 2021-03-18 op 		die();
393 3a227e9a 2021-03-18 op 	memcpy(&e, imsg->data, datalen);
394 3a227e9a 2021-03-18 op 
395 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "a")) == NULL) {
396 3a227e9a 2021-03-18 op 		res = errno;
397 3a227e9a 2021-03-18 op 		goto end;
398 3a227e9a 2021-03-18 op 	}
399 3a227e9a 2021-03-18 op 	fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
400 3a227e9a 2021-03-18 op 	fclose(f);
401 3a227e9a 2021-03-18 op 
402 3a227e9a 2021-03-18 op 	res = 0;
403 3a227e9a 2021-03-18 op end:
404 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
405 288fd238 2021-04-25 op 	    &res, sizeof(res));
406 288fd238 2021-04-25 op }
407 288fd238 2021-04-25 op 
408 288fd238 2021-04-25 op static void
409 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
410 288fd238 2021-04-25 op {
411 288fd238 2021-04-25 op 	FILE	*tmp, *f;
412 288fd238 2021-04-25 op 	struct	 tofu_entry entry;
413 288fd238 2021-04-25 op 	char	 sfn[PATH_MAX], *line = NULL, *t;
414 288fd238 2021-04-25 op 	size_t	 l, linesize = 0;
415 288fd238 2021-04-25 op 	ssize_t	 linelen;
416 288fd238 2021-04-25 op 	int	 fd, e, res = 0;
417 288fd238 2021-04-25 op 
418 288fd238 2021-04-25 op 	if (datalen != sizeof(entry))
419 288fd238 2021-04-25 op 		die();
420 288fd238 2021-04-25 op 	memcpy(&entry, imsg->data, datalen);
421 288fd238 2021-04-25 op 
422 288fd238 2021-04-25 op 	strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
423 288fd238 2021-04-25 op 	if ((fd = mkstemp(sfn)) == -1 ||
424 288fd238 2021-04-25 op 	    (tmp = fdopen(fd, "w")) == NULL) {
425 288fd238 2021-04-25 op 		if (fd != -1) {
426 288fd238 2021-04-25 op 			unlink(sfn);
427 288fd238 2021-04-25 op 			close(fd);
428 288fd238 2021-04-25 op 		}
429 288fd238 2021-04-25 op 		res = 0;
430 288fd238 2021-04-25 op 		goto end;
431 288fd238 2021-04-25 op 	}
432 288fd238 2021-04-25 op 
433 288fd238 2021-04-25 op 	if ((f = fopen(known_hosts_file, "r")) == NULL) {
434 288fd238 2021-04-25 op 		unlink(sfn);
435 288fd238 2021-04-25 op 		fclose(tmp);
436 288fd238 2021-04-25 op                 res = 0;
437 288fd238 2021-04-25 op 		goto end;
438 288fd238 2021-04-25 op 	}
439 288fd238 2021-04-25 op 
440 288fd238 2021-04-25 op 	l = strlen(entry.domain);
441 288fd238 2021-04-25 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
442 288fd238 2021-04-25 op 		if ((t = strstr(line, entry.domain)) != NULL &&
443 288fd238 2021-04-25 op 		    (line[l] == ' ' || line[l] == '\t'))
444 288fd238 2021-04-25 op 			continue;
445 288fd238 2021-04-25 op 		/* line has a trailing \n */
446 288fd238 2021-04-25 op 		fprintf(tmp, "%s", line);
447 288fd238 2021-04-25 op 	}
448 288fd238 2021-04-25 op 	fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
449 288fd238 2021-04-25 op 
450 288fd238 2021-04-25 op 	free(line);
451 288fd238 2021-04-25 op 	e = ferror(tmp);
452 288fd238 2021-04-25 op 
453 288fd238 2021-04-25 op 	fclose(tmp);
454 288fd238 2021-04-25 op 	fclose(f);
455 288fd238 2021-04-25 op 
456 288fd238 2021-04-25 op 	if (e) {
457 288fd238 2021-04-25 op 		unlink(sfn);
458 288fd238 2021-04-25 op 		res = 0;
459 288fd238 2021-04-25 op 		goto end;
460 288fd238 2021-04-25 op 	}
461 288fd238 2021-04-25 op 
462 288fd238 2021-04-25 op 	res = rename(sfn, known_hosts_file) != -1;
463 288fd238 2021-04-25 op 
464 288fd238 2021-04-25 op end:
465 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
466 3a227e9a 2021-03-18 op 	    &res, sizeof(res));
467 de2a69bb 2021-05-17 op }
468 de2a69bb 2021-05-17 op 
469 de2a69bb 2021-05-17 op static void
470 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
471 de2a69bb 2021-05-17 op {
472 de2a69bb 2021-05-17 op 	char	*path, *e;
473 de2a69bb 2021-05-17 op 	int	 fd;
474 de2a69bb 2021-05-17 op 
475 de2a69bb 2021-05-17 op 	path = imsg->data;
476 de2a69bb 2021-05-17 op 	if (path[datalen-1] != '\0')
477 de2a69bb 2021-05-17 op 		die();
478 de2a69bb 2021-05-17 op 
479 de2a69bb 2021-05-17 op 	if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
480 de2a69bb 2021-05-17 op 		e = strerror(errno);
481 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
482 de2a69bb 2021-05-17 op 		    e, strlen(e)+1);
483 de2a69bb 2021-05-17 op 	} else
484 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
485 de2a69bb 2021-05-17 op 		    NULL, 0);
486 3a227e9a 2021-03-18 op }
487 3a227e9a 2021-03-18 op 
488 3a227e9a 2021-03-18 op static void
489 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
490 c7107cec 2021-04-01 op {
491 c7107cec 2021-04-01 op 	if (datalen != 0)
492 c7107cec 2021-04-01 op 		die();
493 c7107cec 2021-04-01 op 
494 c7107cec 2021-04-01 op 	if ((session = fopen(session_file, "w")) == NULL)
495 c7107cec 2021-04-01 op 		die();
496 c7107cec 2021-04-01 op }
497 c7107cec 2021-04-01 op 
498 c7107cec 2021-04-01 op static void
499 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
500 c7107cec 2021-04-01 op {
501 f8c6e753 2021-12-30 op 	struct session_tab	tab;
502 58df4f47 2021-07-17 op 
503 c7107cec 2021-04-01 op 	if (session == NULL)
504 c7107cec 2021-04-01 op 		die();
505 c7107cec 2021-04-01 op 
506 f8c6e753 2021-12-30 op 	if (datalen != sizeof(tab))
507 c7107cec 2021-04-01 op 		die();
508 87e3e801 2021-07-17 op 
509 f8c6e753 2021-12-30 op 	memcpy(&tab, imsg->data, sizeof(tab));
510 f8c6e753 2021-12-30 op 	if (tab.uri[sizeof(tab.uri)-1] != '\0' ||
511 f8c6e753 2021-12-30 op 	    tab.title[sizeof(tab.title)-1] != '\0')
512 f8c6e753 2021-12-30 op 		die();
513 f8c6e753 2021-12-30 op 
514 f8c6e753 2021-12-30 op 	fprintf(session, "%s", tab.uri);
515 f8c6e753 2021-12-30 op 
516 f8c6e753 2021-12-30 op 	if (tab.flags & TAB_CURRENT)
517 2f524b17 2021-07-17 op 		fprintf(session, " current ");
518 2f524b17 2021-07-17 op 	else
519 2f524b17 2021-07-17 op 		fprintf(session, " - ");
520 87e3e801 2021-07-17 op 
521 f8c6e753 2021-12-30 op 	fprintf(session, "%s\n", tab.title);
522 c7107cec 2021-04-01 op }
523 c7107cec 2021-04-01 op 
524 c7107cec 2021-04-01 op static void
525 1040cc7f 2021-01-02 op handle_session_tab_hist(struct imsg *imsg, size_t datalen)
526 1040cc7f 2021-01-02 op {
527 1040cc7f 2021-01-02 op 	struct session_tab_hist th;
528 1040cc7f 2021-01-02 op 
529 1040cc7f 2021-01-02 op 	if (session == NULL)
530 1040cc7f 2021-01-02 op 		die();
531 1040cc7f 2021-01-02 op 
532 1040cc7f 2021-01-02 op 	if (datalen != sizeof(th))
533 1040cc7f 2021-01-02 op 		die();
534 1040cc7f 2021-01-02 op 
535 1040cc7f 2021-01-02 op 	memcpy(&th, imsg->data, sizeof(th));
536 1040cc7f 2021-01-02 op 	if (th.uri[sizeof(th.uri)-1] != '\0')
537 1040cc7f 2021-01-02 op 		die();
538 1040cc7f 2021-01-02 op 
539 1040cc7f 2021-01-02 op 	fprintf(session, "%s %s\n", th.future ? ">" : "<", th.uri);
540 1040cc7f 2021-01-02 op }
541 1040cc7f 2021-01-02 op 
542 1040cc7f 2021-01-02 op static void
543 c7107cec 2021-04-01 op handle_session_end(struct imsg *imsg, size_t datalen)
544 c7107cec 2021-04-01 op {
545 c7107cec 2021-04-01 op 	if (session == NULL)
546 c7107cec 2021-04-01 op 		die();
547 c7107cec 2021-04-01 op 	fclose(session);
548 c7107cec 2021-04-01 op 	session = NULL;
549 c7107cec 2021-04-01 op }
550 c7107cec 2021-04-01 op 
551 c7107cec 2021-04-01 op static void
552 1304bbdd 2021-03-15 op handle_dispatch_imsg(int fd, short ev, void *d)
553 35e1f40a 2021-03-14 op {
554 bc10f6a5 2021-07-12 op 	struct imsgev	*iev = d;
555 ea080950 2021-07-20 op 	int		 e;
556 ea080950 2021-07-20 op 
557 ea080950 2021-07-20 op 	if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
558 ea080950 2021-07-20 op 		/*
559 eb2ed626 2021-10-07 op 		 * This should leave a ~/.cache/telescope/crashed file to
560 ea080950 2021-07-20 op 		 * trigger about:crash on next run.  Unfortunately, if
561 ea080950 2021-07-20 op 		 * the main process dies the fs sticks around and
562 ea080950 2021-07-20 op 		 * doesn't notice that the fd was closed.  Why EV_READ
563 ea080950 2021-07-20 op 		 * is not triggered when a fd is closed on the other end?
564 ea080950 2021-07-20 op 		 */
565 ea080950 2021-07-20 op 		e = errno;
566 ea080950 2021-07-20 op 		if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
567 ea080950 2021-07-20 op 		    == -1)
568 ea080950 2021-07-20 op 			err(1, "open");
569 ea080950 2021-07-20 op 		close(fd);
570 ea080950 2021-07-20 op 		errx(1, "connection closed: %s", strerror(e));
571 ea080950 2021-07-20 op 	}
572 35e1f40a 2021-03-14 op }
573 35e1f40a 2021-03-14 op 
574 bc10f6a5 2021-07-12 op static int
575 bc10f6a5 2021-07-12 op fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
576 bc10f6a5 2021-07-12 op     uint16_t datalen)
577 bc10f6a5 2021-07-12 op {
578 bc10f6a5 2021-07-12 op 	return imsg_compose_event(iev_ui, type, peerid, 0, fd,
579 bc10f6a5 2021-07-12 op 	    data, datalen);
580 bc10f6a5 2021-07-12 op }
581 bc10f6a5 2021-07-12 op 
582 eb2ed626 2021-10-07 op static size_t
583 eb2ed626 2021-10-07 op join_path(char *buf, const char *lhs, const char *rhs, size_t buflen)
584 35e1f40a 2021-03-14 op {
585 eb2ed626 2021-10-07 op 	strlcpy(buf, lhs, buflen);
586 eb2ed626 2021-10-07 op 	return strlcat(buf, rhs, buflen);
587 eb2ed626 2021-10-07 op }
588 d0fd368a 2021-07-15 op 
589 eb2ed626 2021-10-07 op static void
590 eb2ed626 2021-10-07 op getenv_default(char *buf, const char *name, const char *def, size_t buflen)
591 eb2ed626 2021-10-07 op {
592 eb2ed626 2021-10-07 op 	size_t ret;
593 eb2ed626 2021-10-07 op 	char *home, *env;
594 740f578b 2021-03-15 op 
595 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
596 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
597 3a227e9a 2021-03-18 op 
598 eb2ed626 2021-10-07 op 	if ((env = getenv(name)) != NULL)
599 eb2ed626 2021-10-07 op 		ret = strlcpy(buf, env, buflen);
600 eb2ed626 2021-10-07 op 	else
601 eb2ed626 2021-10-07 op 		ret = join_path(buf, home, def, buflen);
602 288fd238 2021-04-25 op 
603 eb2ed626 2021-10-07 op 	if (ret >= buflen)
604 eb2ed626 2021-10-07 op 		errx(1, "buffer too small for %s", name);
605 eb2ed626 2021-10-07 op }
606 c7107cec 2021-04-01 op 
607 eb2ed626 2021-10-07 op static void
608 eb2ed626 2021-10-07 op mkdirs(const char *path, mode_t mode)
609 eb2ed626 2021-10-07 op {
610 444dad86 2021-10-07 op 	char copy[PATH_MAX+1], orig[PATH_MAX+1], *parent;
611 ea080950 2021-07-20 op 
612 eb2ed626 2021-10-07 op 	strlcpy(copy, path, sizeof(copy));
613 444dad86 2021-10-07 op 	strlcpy(orig, path, sizeof(orig));
614 eb2ed626 2021-10-07 op 	parent = dirname(copy);
615 eb2ed626 2021-10-07 op 	if (!strcmp(parent, "/"))
616 eb2ed626 2021-10-07 op 		return;
617 eb2ed626 2021-10-07 op 	mkdirs(parent, mode);
618 eb2ed626 2021-10-07 op 
619 444dad86 2021-10-07 op 	if (mkdir(orig, mode) != 0) {
620 eb2ed626 2021-10-07 op 		if (errno == EEXIST)
621 eb2ed626 2021-10-07 op 			return;
622 444dad86 2021-10-07 op 		err(1, "can't mkdir %s", orig);
623 eb2ed626 2021-10-07 op 	}
624 eb2ed626 2021-10-07 op }
625 eb2ed626 2021-10-07 op 
626 eb2ed626 2021-10-07 op static void
627 eb2ed626 2021-10-07 op xdg_init(void)
628 eb2ed626 2021-10-07 op {
629 eb2ed626 2021-10-07 op 	char *home, old_path[PATH_MAX];
630 eb2ed626 2021-10-07 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 eb2ed626 2021-10-07 op 	xdg_init();
676 eb2ed626 2021-10-07 op 
677 eb2ed626 2021-10-07 op 	join_path(config_path, config_path_base, "/config",
678 eb2ed626 2021-10-07 op 	    sizeof(config_path));
679 eb2ed626 2021-10-07 op 	join_path(lockfile_path, cache_path_base, "/lock",
680 eb2ed626 2021-10-07 op 	    sizeof(lockfile_path));
681 eb2ed626 2021-10-07 op 	join_path(bookmark_file, data_path_base, "/bookmarks.gmi",
682 eb2ed626 2021-10-07 op 	    sizeof(bookmark_file));
683 eb2ed626 2021-10-07 op 	join_path(known_hosts_file, data_path_base, "/known_hosts",
684 eb2ed626 2021-10-07 op 	    sizeof(known_hosts_file));
685 eb2ed626 2021-10-07 op 	join_path(known_hosts_tmp, cache_path_base,
686 eb2ed626 2021-10-07 op 	    "/known_hosts.tmp.XXXXXXXXXX", sizeof(known_hosts_tmp));
687 eb2ed626 2021-10-07 op 	join_path(session_file, cache_path_base, "/session",
688 eb2ed626 2021-10-07 op 	    sizeof(session_file));
689 eb2ed626 2021-10-07 op 	join_path(crashed_file, cache_path_base, "/crashed",
690 eb2ed626 2021-10-07 op 	    sizeof(crashed_file));
691 eb2ed626 2021-10-07 op 
692 3a227e9a 2021-03-18 op 	return 1;
693 3a227e9a 2021-03-18 op }
694 bb28f1c2 2021-12-30 op 
695 bb28f1c2 2021-12-30 op /*
696 bb28f1c2 2021-12-30 op  * Parse a line of the session file.  The format is:
697 bb28f1c2 2021-12-30 op  *
698 bb28f1c2 2021-12-30 op  *	URL [flags,...] [title]\n
699 bb28f1c2 2021-12-30 op  */
700 bb28f1c2 2021-12-30 op static void
701 bb28f1c2 2021-12-30 op parse_session_line(char *line, const char **title, uint32_t *flags)
702 bb28f1c2 2021-12-30 op {
703 bb28f1c2 2021-12-30 op 	char *s, *t, *ap;
704 bb28f1c2 2021-12-30 op 
705 bb28f1c2 2021-12-30 op 	*title = "";
706 bb28f1c2 2021-12-30 op 	*flags = 0;
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 bb28f1c2 2021-12-30 op 	if ((t = strchr(s, ' ')) != NULL) {
713 bb28f1c2 2021-12-30 op 		*t++ = '\0';
714 bb28f1c2 2021-12-30 op 		*title = t;
715 bb28f1c2 2021-12-30 op 	}
716 bb28f1c2 2021-12-30 op 
717 bb28f1c2 2021-12-30 op 	while ((ap = strsep(&s, ",")) != NULL) {
718 bb28f1c2 2021-12-30 op 		if (!strcmp(ap, "current"))
719 bb28f1c2 2021-12-30 op 			*flags |= TAB_CURRENT;
720 bb28f1c2 2021-12-30 op 	}
721 bb28f1c2 2021-12-30 op }
722 bb28f1c2 2021-12-30 op 
723 bb28f1c2 2021-12-30 op static inline void
724 bb28f1c2 2021-12-30 op sendtab(uint32_t flags, const char *uri, const char *title)
725 bb28f1c2 2021-12-30 op {
726 bb28f1c2 2021-12-30 op 	struct session_tab tab;
727 bb28f1c2 2021-12-30 op 
728 bb28f1c2 2021-12-30 op 	memset(&tab, 0, sizeof(tab));
729 bb28f1c2 2021-12-30 op 	tab.flags = flags;
730 bb28f1c2 2021-12-30 op 
731 bb28f1c2 2021-12-30 op 	if (strlcpy(tab.uri, uri, sizeof(tab.uri)) >= sizeof(tab.uri))
732 bb28f1c2 2021-12-30 op 		return;
733 bb28f1c2 2021-12-30 op 
734 bb28f1c2 2021-12-30 op 	/* don't worry about cached title truncation */
735 bb28f1c2 2021-12-30 op 	if (title != NULL)
736 bb28f1c2 2021-12-30 op 		strlcpy(tab.title, title, sizeof(tab.title));
737 bb28f1c2 2021-12-30 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 	uint32_t	 flags;
760 bb28f1c2 2021-12-30 op 	size_t		 linesize = 0;
761 bb28f1c2 2021-12-30 op 	ssize_t		 linelen;
762 bb28f1c2 2021-12-30 op 	int		 first_time = 0;
763 1040cc7f 2021-01-02 op 	int		 future;
764 bb28f1c2 2021-12-30 op 	const char	*title;
765 1040cc7f 2021-01-02 op 	char		*nl, *s, *line = NULL;
766 bb28f1c2 2021-12-30 op 
767 bb28f1c2 2021-12-30 op 	if ((session = fopen(session_file, "r")) == NULL) {
768 bb28f1c2 2021-12-30 op 		/* first time? */
769 bb28f1c2 2021-12-30 op 		first_time = 1;
770 bb28f1c2 2021-12-30 op 		goto end;
771 bb28f1c2 2021-12-30 op 	}
772 bb28f1c2 2021-12-30 op 
773 bb28f1c2 2021-12-30 op 	while ((linelen = getline(&line, &linesize, session)) != -1) {
774 bb28f1c2 2021-12-30 op 		if ((nl = strchr(line, '\n')) != NULL)
775 bb28f1c2 2021-12-30 op 			*nl = '\0';
776 1040cc7f 2021-01-02 op 
777 1040cc7f 2021-01-02 op 		if (*line == '<' || *line == '>') {
778 1040cc7f 2021-01-02 op 			future = *line == '>';
779 1040cc7f 2021-01-02 op 			s = line+1;
780 1040cc7f 2021-01-02 op 			if (*s != ' ')
781 1040cc7f 2021-01-02 op 				continue;
782 1040cc7f 2021-01-02 op 			sendhist(++s, future);
783 1040cc7f 2021-01-02 op 		} else {
784 1040cc7f 2021-01-02 op 			parse_session_line(line, &title, &flags);
785 1040cc7f 2021-01-02 op 			sendtab(flags, line, title);
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 bb28f1c2 2021-12-30 op 	if (last_time_crashed())
793 bb28f1c2 2021-12-30 op 		sendtab(TAB_CURRENT, "about:crash", NULL);
794 bb28f1c2 2021-12-30 op 
795 bb28f1c2 2021-12-30 op end:
796 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_END, 0, -1, &first_time, sizeof(first_time));
797 bb28f1c2 2021-12-30 op }
798 bb28f1c2 2021-12-30 op 
799 3a227e9a 2021-03-18 op int
800 6cc5fcfe 2021-07-08 op fs_main(void)
801 3a227e9a 2021-03-18 op {
802 6cc5fcfe 2021-07-08 op 	setproctitle("fs");
803 3a227e9a 2021-03-18 op 
804 6cc5fcfe 2021-07-08 op 	fs_init();
805 6cc5fcfe 2021-07-08 op 
806 35e1f40a 2021-03-14 op 	event_init();
807 35e1f40a 2021-03-14 op 
808 bc10f6a5 2021-07-12 op 	/* Setup pipe and event handler to the main process */
809 bc10f6a5 2021-07-12 op 	if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
810 6cc5fcfe 2021-07-08 op 		die();
811 bc10f6a5 2021-07-12 op 	imsg_init(&iev_ui->ibuf, 3);
812 bc10f6a5 2021-07-12 op 	iev_ui->handler = handle_dispatch_imsg;
813 bc10f6a5 2021-07-12 op 	iev_ui->events = EV_READ;
814 bc10f6a5 2021-07-12 op 	event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
815 bc10f6a5 2021-07-12 op 	    iev_ui->handler, iev_ui);
816 bc10f6a5 2021-07-12 op 	event_add(&iev_ui->ev, NULL);
817 35e1f40a 2021-03-14 op 
818 35e1f40a 2021-03-14 op 	sandbox_fs_process();
819 35e1f40a 2021-03-14 op 
820 35e1f40a 2021-03-14 op 	event_dispatch();
821 35e1f40a 2021-03-14 op 	return 0;
822 35e1f40a 2021-03-14 op }
823 3a227e9a 2021-03-18 op 
824 3a227e9a 2021-03-18 op 
825 d0fd368a 2021-07-15 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 d0fd368a 2021-07-15 op 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