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 35e1f40a 2021-03-14 op 
 40 35e1f40a 2021-03-14 op static void		 die(void) __attribute__((__noreturn__));
 41 fb4dc49f 2021-08-13 op static void		 send_file(uint32_t, FILE *);
 42 35e1f40a 2021-03-14 op static void		 handle_get(struct imsg*, size_t);
 43 5cbe1763 2021-08-13 op static int		 select_non_dot(const struct dirent *);
 44 5cbe1763 2021-08-13 op static int		 select_non_dotdot(const struct dirent *);
 45 fb4dc49f 2021-08-13 op static void		 handle_get_file(struct imsg*, size_t);
 46 50f03682 2022-01-03 op static void		 handle_misc(struct imsg *, size_t);
 47 740f578b 2021-03-15 op static void		 handle_bookmark_page(struct imsg*, size_t);
 48 3a227e9a 2021-03-18 op static void		 handle_save_cert(struct imsg*, size_t);
 49 288fd238 2021-04-25 op static void		 handle_update_cert(struct imsg*, size_t);
 50 de2a69bb 2021-05-17 op static void		 handle_file_open(struct imsg*, size_t);
 51 c7107cec 2021-04-01 op static void		 handle_session_start(struct imsg*, size_t);
 52 c7107cec 2021-04-01 op static void		 handle_session_tab(struct imsg*, size_t);
 53 1040cc7f 2021-01-02 op static void		 handle_session_tab_hist(struct imsg*, size_t);
 54 c7107cec 2021-04-01 op static void		 handle_session_end(struct imsg*, size_t);
 55 1304bbdd 2021-03-15 op static void		 handle_dispatch_imsg(int, short, void*);
 56 bc10f6a5 2021-07-12 op static int		 fs_send_ui(int, uint32_t, int, const void *, uint16_t);
 57 eb2ed626 2021-10-07 op static size_t		 join_path(char*, const char*, const char*, size_t);
 58 eb2ed626 2021-10-07 op static void		 getenv_default(char*, const char*, const char*, size_t);
 59 eb2ed626 2021-10-07 op static void		 mkdirs(const char*, mode_t);
 60 eb2ed626 2021-10-07 op static void		 xdg_init(void);
 61 50f03682 2022-01-03 op static void		 load_last_session(void);
 62 eb722b50 2022-01-03 op static void		 load_certs(void);
 63 35e1f40a 2021-03-14 op 
 64 bc10f6a5 2021-07-12 op static struct imsgev		*iev_ui;
 65 c7107cec 2021-04-01 op static FILE			*session;
 66 c7107cec 2021-04-01 op 
 67 f88fbabc 2021-11-27 op /*
 68 f88fbabc 2021-11-27 op  * Note: these are empty if ~/.telescope exists, use *_path_base
 69 f88fbabc 2021-11-27 op  * below.
 70 f88fbabc 2021-11-27 op  */
 71 eb2ed626 2021-10-07 op static char	xdg_config_base[PATH_MAX];
 72 eb2ed626 2021-10-07 op static char	xdg_data_base[PATH_MAX];
 73 eb2ed626 2021-10-07 op static char	xdg_cache_base[PATH_MAX];
 74 eb2ed626 2021-10-07 op 
 75 f88fbabc 2021-11-27 op /*
 76 f88fbabc 2021-11-27 op  * Where to store user data.  These are all equal to ~/.telescope if
 77 f88fbabc 2021-11-27 op  * it exists.
 78 f88fbabc 2021-11-27 op  */
 79 fb3d08c1 2021-10-07 op char		config_path_base[PATH_MAX];
 80 fb3d08c1 2021-10-07 op char		data_path_base[PATH_MAX];
 81 fb3d08c1 2021-10-07 op char		cache_path_base[PATH_MAX];
 82 eb2ed626 2021-10-07 op 
 83 eb2ed626 2021-10-07 op char		config_path[PATH_MAX];
 84 fb3d08c1 2021-10-07 op char		lockfile_path[PATH_MAX];
 85 fb3d08c1 2021-10-07 op char		bookmark_file[PATH_MAX];
 86 fb3d08c1 2021-10-07 op char		known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
 87 fb3d08c1 2021-10-07 op char		crashed_file[PATH_MAX];
 88 fb3d08c1 2021-10-07 op char		session_file[PATH_MAX];
 89 740f578b 2021-03-15 op 
 90 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
 91 35e1f40a 2021-03-14 op 	[IMSG_GET] = handle_get,
 92 fb4dc49f 2021-08-13 op 	[IMSG_GET_FILE] = handle_get_file,
 93 50f03682 2022-01-03 op 	[IMSG_QUIT] = handle_misc,
 94 50f03682 2022-01-03 op 	[IMSG_INIT] = handle_misc,
 95 740f578b 2021-03-15 op 	[IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
 96 3a227e9a 2021-03-18 op 	[IMSG_SAVE_CERT] = handle_save_cert,
 97 288fd238 2021-04-25 op 	[IMSG_UPDATE_CERT] = handle_update_cert,
 98 de2a69bb 2021-05-17 op 	[IMSG_FILE_OPEN] = handle_file_open,
 99 c7107cec 2021-04-01 op 	[IMSG_SESSION_START] = handle_session_start,
100 c7107cec 2021-04-01 op 	[IMSG_SESSION_TAB] = handle_session_tab,
101 1040cc7f 2021-01-02 op 	[IMSG_SESSION_TAB_HIST] = handle_session_tab_hist,
102 c7107cec 2021-04-01 op 	[IMSG_SESSION_END] = handle_session_end,
103 35e1f40a 2021-03-14 op };
104 35e1f40a 2021-03-14 op 
105 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
106 35e1f40a 2021-03-14 op die(void)
107 35e1f40a 2021-03-14 op {
108 35e1f40a 2021-03-14 op 	abort(); 		/* TODO */
109 35e1f40a 2021-03-14 op }
110 35e1f40a 2021-03-14 op 
111 35e1f40a 2021-03-14 op static void
112 fb4dc49f 2021-08-13 op send_file(uint32_t peerid, FILE *f)
113 fb4dc49f 2021-08-13 op {
114 fb4dc49f 2021-08-13 op 	ssize_t	 r;
115 fb4dc49f 2021-08-13 op 	char	 buf[BUFSIZ];
116 fb4dc49f 2021-08-13 op 
117 fb4dc49f 2021-08-13 op 	for (;;) {
118 fb4dc49f 2021-08-13 op 		r = fread(buf, 1, sizeof(buf), f);
119 fb4dc49f 2021-08-13 op 		if (r != 0)
120 fb4dc49f 2021-08-13 op 			fs_send_ui(IMSG_BUF, peerid, -1, buf, r);
121 fb4dc49f 2021-08-13 op 		if (r != sizeof(buf))
122 fb4dc49f 2021-08-13 op 			break;
123 fb4dc49f 2021-08-13 op 	}
124 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
125 fb4dc49f 2021-08-13 op 	fclose(f);
126 fb4dc49f 2021-08-13 op }
127 fb4dc49f 2021-08-13 op 
128 fb4dc49f 2021-08-13 op static void
129 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
130 35e1f40a 2021-03-14 op {
131 56e7efb4 2021-07-21 op 	const char	*bpath = "bookmarks.gmi";
132 fb4dc49f 2021-08-13 op 	char		 path[PATH_MAX];
133 56e7efb4 2021-07-21 op 	FILE		*f;
134 a2728733 2021-07-18 op 	const char	*data, *p;
135 a2728733 2021-07-18 op 	size_t		 i;
136 a2728733 2021-07-18 op 	struct page {
137 a2728733 2021-07-18 op 		const char	*name;
138 56e7efb4 2021-07-21 op 		const char	*path;
139 a2728733 2021-07-18 op 		const uint8_t	*data;
140 a2728733 2021-07-18 op 		size_t		 len;
141 a2728733 2021-07-18 op 	} pages[] = {
142 56e7efb4 2021-07-21 op 		{"about",	NULL,	about_about,	about_about_len},
143 56e7efb4 2021-07-21 op 		{"blank",	NULL,	about_blank,	about_blank_len},
144 56e7efb4 2021-07-21 op 		{"bookmarks",	bpath,	bookmarks,	bookmarks_len},
145 56e7efb4 2021-07-21 op 		{"crash",	NULL,	about_crash,	about_crash_len},
146 56e7efb4 2021-07-21 op 		{"help",	NULL,	about_help,	about_help_len},
147 56e7efb4 2021-07-21 op 		{"license",	NULL,	about_license,	about_license_len},
148 56e7efb4 2021-07-21 op 		{"new",		NULL,	about_new,	about_new_len},
149 56e7efb4 2021-07-21 op 	}, *page = NULL;
150 35e1f40a 2021-03-14 op 
151 35e1f40a 2021-03-14 op 	data = imsg->data;
152 56e7efb4 2021-07-21 op 	if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
153 35e1f40a 2021-03-14 op 		die();
154 56e7efb4 2021-07-21 op 	if ((data = strchr(data, ':')) == NULL)
155 56e7efb4 2021-07-21 op 		goto notfound;
156 56e7efb4 2021-07-21 op 	data++;
157 35e1f40a 2021-03-14 op 
158 56e7efb4 2021-07-21 op 	for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
159 56e7efb4 2021-07-21 op 		if (!strcmp(data, pages[i].name)) {
160 56e7efb4 2021-07-21 op 			page = &pages[i];
161 56e7efb4 2021-07-21 op 			break;
162 56e7efb4 2021-07-21 op 		}
163 56e7efb4 2021-07-21 op 
164 56e7efb4 2021-07-21 op 	if (page == NULL)
165 56e7efb4 2021-07-21 op 		goto notfound;
166 56e7efb4 2021-07-21 op 
167 de04b178 2021-11-26 op 	strlcpy(path, data_path_base, sizeof(path));
168 56e7efb4 2021-07-21 op 	strlcat(path, "/", sizeof(path));
169 56e7efb4 2021-07-21 op 	if (page->path != NULL)
170 56e7efb4 2021-07-21 op 		strlcat(path, page->path, sizeof(path));
171 56e7efb4 2021-07-21 op 	else {
172 56e7efb4 2021-07-21 op 		strlcat(path, "pages/about_", sizeof(path));
173 56e7efb4 2021-07-21 op 		strlcat(path, page->name, sizeof(path));
174 56e7efb4 2021-07-21 op 		strlcat(path, ".gmi", sizeof(path));
175 56e7efb4 2021-07-21 op 	}
176 56e7efb4 2021-07-21 op 
177 56e7efb4 2021-07-21 op 	if ((f = fopen(path, "r")) == NULL) {
178 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
179 56e7efb4 2021-07-21 op 		    page->data, page->len);
180 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
181 56e7efb4 2021-07-21 op 		    NULL, 0);
182 a2728733 2021-07-18 op 		return;
183 35e1f40a 2021-03-14 op 	}
184 a2728733 2021-07-18 op 
185 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
186 56e7efb4 2021-07-21 op 	return;
187 56e7efb4 2021-07-21 op 
188 56e7efb4 2021-07-21 op notfound:
189 a2728733 2021-07-18 op 	p = "# not found!\n";
190 a2728733 2021-07-18 op 	fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
191 a2728733 2021-07-18 op 	fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
192 fb4dc49f 2021-08-13 op }
193 fb4dc49f 2021-08-13 op 
194 fb4dc49f 2021-08-13 op static inline void
195 fb4dc49f 2021-08-13 op send_hdr(uint32_t peerid, int code, const char *meta)
196 fb4dc49f 2021-08-13 op {
197 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_CODE, peerid, -1, &code, sizeof(code));
198 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_META, peerid, -1, meta, strlen(meta)+1);
199 fb4dc49f 2021-08-13 op }
200 fb4dc49f 2021-08-13 op 
201 24a68158 2021-08-13 op static inline void
202 24a68158 2021-08-13 op send_errno(uint32_t peerid, int code, const char *str, int no)
203 24a68158 2021-08-13 op {
204 24a68158 2021-08-13 op 	char *s;
205 24a68158 2021-08-13 op 
206 24a68158 2021-08-13 op 	if (asprintf(&s, "%s: %s", str, strerror(no)) == -1)
207 24a68158 2021-08-13 op 		s = NULL;
208 24a68158 2021-08-13 op 
209 24a68158 2021-08-13 op 	send_hdr(peerid, code, s == NULL ? str : s);
210 24a68158 2021-08-13 op 	free(s);
211 24a68158 2021-08-13 op }
212 24a68158 2021-08-13 op 
213 65124267 2021-08-13 op static inline const char *
214 65124267 2021-08-13 op file_type(const char *path)
215 fb4dc49f 2021-08-13 op {
216 fb4dc49f 2021-08-13 op 	struct mapping {
217 fb4dc49f 2021-08-13 op 		const char	*ext;
218 fb4dc49f 2021-08-13 op 		const char	*mime;
219 fb4dc49f 2021-08-13 op 	} ms[] = {
220 fb4dc49f 2021-08-13 op 		{"diff",	"text/x-patch"},
221 fb4dc49f 2021-08-13 op 		{"gemini",	"text/gemini"},
222 fb4dc49f 2021-08-13 op 		{"gmi",		"text/gemini"},
223 fb4dc49f 2021-08-13 op 		{"markdown",	"text/plain"},
224 fb4dc49f 2021-08-13 op 		{"md",		"text/plain"},
225 fb4dc49f 2021-08-13 op 		{"patch",	"text/x-patch"},
226 fb4dc49f 2021-08-13 op 		{"txt",		"text/plain"},
227 fb4dc49f 2021-08-13 op 		{NULL, NULL},
228 65124267 2021-08-13 op 	}, *m;
229 65124267 2021-08-13 op 	char *dot;
230 65124267 2021-08-13 op 
231 65124267 2021-08-13 op 	if ((dot = strrchr(path, '.')) == NULL)
232 65124267 2021-08-13 op 		return NULL;
233 65124267 2021-08-13 op 
234 65124267 2021-08-13 op 	dot++;
235 65124267 2021-08-13 op 
236 65124267 2021-08-13 op 	for (m = ms; m->ext != NULL; ++m)
237 65124267 2021-08-13 op 		if (!strcmp(m->ext, dot))
238 65124267 2021-08-13 op 			return m->mime;
239 65124267 2021-08-13 op 
240 65124267 2021-08-13 op 	return NULL;
241 5cbe1763 2021-08-13 op }
242 5cbe1763 2021-08-13 op 
243 5cbe1763 2021-08-13 op static int
244 5cbe1763 2021-08-13 op select_non_dot(const struct dirent *d)
245 5cbe1763 2021-08-13 op {
246 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".");
247 5cbe1763 2021-08-13 op }
248 5cbe1763 2021-08-13 op 
249 5cbe1763 2021-08-13 op static int
250 5cbe1763 2021-08-13 op select_non_dotdot(const struct dirent *d)
251 5cbe1763 2021-08-13 op {
252 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".") && strcmp(d->d_name, "..");
253 65124267 2021-08-13 op }
254 65124267 2021-08-13 op 
255 65124267 2021-08-13 op static inline void
256 65124267 2021-08-13 op send_dir(uint32_t peerid, const char *path)
257 65124267 2021-08-13 op {
258 65124267 2021-08-13 op 	struct dirent	**names;
259 65124267 2021-08-13 op 	struct evbuffer	 *ev;
260 5d43215b 2021-08-13 op 	char		 *s;
261 5cbe1763 2021-08-13 op 	int		(*selector)(const struct dirent *) = select_non_dot;
262 24a68158 2021-08-13 op 	int		  i, len, no;
263 65124267 2021-08-13 op 
264 5d43215b 2021-08-13 op 	if (!has_suffix(path, "/")) {
265 5d43215b 2021-08-13 op 		if (asprintf(&s, "%s/", path) == -1)
266 5d43215b 2021-08-13 op 			die();
267 5d43215b 2021-08-13 op 		send_hdr(peerid, 30, s);
268 5d43215b 2021-08-13 op 		free(s);
269 5d43215b 2021-08-13 op 		return;
270 5d43215b 2021-08-13 op 	}
271 5d43215b 2021-08-13 op 
272 5cbe1763 2021-08-13 op 	if (!strcmp(path, "/"))
273 5cbe1763 2021-08-13 op 		selector = select_non_dotdot;
274 5cbe1763 2021-08-13 op 
275 65124267 2021-08-13 op 	if ((ev = evbuffer_new()) == NULL ||
276 5cbe1763 2021-08-13 op 	    (len = scandir(path, &names, selector, alphasort)) == -1) {
277 24a68158 2021-08-13 op 		no = errno;
278 65124267 2021-08-13 op 		evbuffer_free(ev);
279 24a68158 2021-08-13 op 		send_errno(peerid, 40, "failure reading the directory", no);
280 65124267 2021-08-13 op 		return;
281 65124267 2021-08-13 op 	}
282 65124267 2021-08-13 op 
283 65124267 2021-08-13 op 	evbuffer_add_printf(ev, "# Index of %s\n\n", path);
284 65124267 2021-08-13 op 	for (i = 0; i < len; ++i) {
285 65124267 2021-08-13 op 		evbuffer_add_printf(ev, "=> %s", names[i]->d_name);
286 65124267 2021-08-13 op 		if (names[i]->d_type == DT_DIR)
287 65124267 2021-08-13 op 			evbuffer_add(ev, "/", 1);
288 65124267 2021-08-13 op 		evbuffer_add(ev, "\n", 1);
289 65124267 2021-08-13 op 	}
290 65124267 2021-08-13 op 
291 65124267 2021-08-13 op 	send_hdr(peerid, 20, "text/gemini");
292 65124267 2021-08-13 op 	fs_send_ui(IMSG_BUF, peerid, -1,
293 65124267 2021-08-13 op 	    EVBUFFER_DATA(ev), EVBUFFER_LENGTH(ev));
294 65124267 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
295 65124267 2021-08-13 op 
296 65124267 2021-08-13 op 	evbuffer_free(ev);
297 65124267 2021-08-13 op 	free(names);
298 65124267 2021-08-13 op }
299 65124267 2021-08-13 op 
300 65124267 2021-08-13 op static void
301 65124267 2021-08-13 op handle_get_file(struct imsg *imsg, size_t datalen)
302 65124267 2021-08-13 op {
303 65124267 2021-08-13 op 	struct stat	 sb;
304 fb4dc49f 2021-08-13 op 	FILE		*f;
305 65124267 2021-08-13 op 	char		*data;
306 fb4dc49f 2021-08-13 op 	const char	*meta = NULL;
307 fb4dc49f 2021-08-13 op 
308 fb4dc49f 2021-08-13 op 	data = imsg->data;
309 fb4dc49f 2021-08-13 op 	data[datalen-1] = '\0';
310 fb4dc49f 2021-08-13 op 
311 65124267 2021-08-13 op 	if ((f = fopen(data, "r")) == NULL) {
312 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 51, "can't open", errno);
313 fb4dc49f 2021-08-13 op 		return;
314 fb4dc49f 2021-08-13 op 	}
315 fb4dc49f 2021-08-13 op 
316 65124267 2021-08-13 op 	if (fstat(fileno(f), &sb) == -1) {
317 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 40, "fstat", errno);
318 65124267 2021-08-13 op 		return;
319 fb4dc49f 2021-08-13 op 	}
320 fb4dc49f 2021-08-13 op 
321 65124267 2021-08-13 op 	if (S_ISDIR(sb.st_mode)) {
322 65124267 2021-08-13 op 		fclose(f);
323 65124267 2021-08-13 op 		send_dir(imsg->hdr.peerid, data);
324 fb4dc49f 2021-08-13 op 		return;
325 fb4dc49f 2021-08-13 op 	}
326 fb4dc49f 2021-08-13 op 
327 65124267 2021-08-13 op 	if ((meta = file_type(data)) == NULL) {
328 65124267 2021-08-13 op 		fclose(f);
329 65124267 2021-08-13 op 		send_hdr(imsg->hdr.peerid, 51,
330 65124267 2021-08-13 op 		    "don't know how to visualize this file");
331 fb4dc49f 2021-08-13 op 		return;
332 fb4dc49f 2021-08-13 op 	}
333 fb4dc49f 2021-08-13 op 
334 fb4dc49f 2021-08-13 op 	send_hdr(imsg->hdr.peerid, 20, meta);
335 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
336 35e1f40a 2021-03-14 op }
337 35e1f40a 2021-03-14 op 
338 35e1f40a 2021-03-14 op static void
339 50f03682 2022-01-03 op handle_misc(struct imsg *imsg, size_t datalen)
340 50f03682 2022-01-03 op {
341 50f03682 2022-01-03 op 	switch (imsg->hdr.type) {
342 50f03682 2022-01-03 op 	case IMSG_INIT:
343 eb722b50 2022-01-03 op 		load_certs();
344 50f03682 2022-01-03 op 		load_last_session();
345 50f03682 2022-01-03 op 		break;
346 be97d6e6 2021-08-15 op 
347 50f03682 2022-01-03 op 	case IMSG_QUIT:
348 50f03682 2022-01-03 op 		if (!safe_mode)
349 50f03682 2022-01-03 op 			unlink(crashed_file);
350 50f03682 2022-01-03 op 		event_loopbreak();
351 50f03682 2022-01-03 op 		break;
352 50f03682 2022-01-03 op 
353 50f03682 2022-01-03 op 	default:
354 50f03682 2022-01-03 op 		die();
355 50f03682 2022-01-03 op 	}
356 35e1f40a 2021-03-14 op }
357 35e1f40a 2021-03-14 op 
358 35e1f40a 2021-03-14 op static void
359 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
360 740f578b 2021-03-15 op {
361 740f578b 2021-03-15 op 	char	*data;
362 740f578b 2021-03-15 op 	int	 res;
363 740f578b 2021-03-15 op 	FILE	*f;
364 740f578b 2021-03-15 op 
365 740f578b 2021-03-15 op 	data = imsg->data;
366 740f578b 2021-03-15 op 	if (data[datalen-1] != '\0')
367 740f578b 2021-03-15 op 		die();
368 740f578b 2021-03-15 op 
369 740f578b 2021-03-15 op 	if ((f = fopen(bookmark_file, "a")) == NULL) {
370 740f578b 2021-03-15 op 		res = errno;
371 740f578b 2021-03-15 op 		goto end;
372 740f578b 2021-03-15 op 	}
373 740f578b 2021-03-15 op 	fprintf(f, "=> %s\n", data);
374 740f578b 2021-03-15 op 	fclose(f);
375 740f578b 2021-03-15 op 
376 740f578b 2021-03-15 op 	res = 0;
377 740f578b 2021-03-15 op end:
378 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
379 740f578b 2021-03-15 op }
380 740f578b 2021-03-15 op 
381 740f578b 2021-03-15 op static void
382 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
383 3a227e9a 2021-03-18 op {
384 3a227e9a 2021-03-18 op 	struct tofu_entry	 e;
385 3a227e9a 2021-03-18 op 	FILE			*f;
386 3a227e9a 2021-03-18 op 	int			 res;
387 3a227e9a 2021-03-18 op 
388 3a227e9a 2021-03-18 op 	/* TODO: traverse the file to avoid duplications? */
389 3a227e9a 2021-03-18 op 
390 3a227e9a 2021-03-18 op 	if (datalen != sizeof(e))
391 3a227e9a 2021-03-18 op 		die();
392 3a227e9a 2021-03-18 op 	memcpy(&e, imsg->data, datalen);
393 3a227e9a 2021-03-18 op 
394 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "a")) == NULL) {
395 3a227e9a 2021-03-18 op 		res = errno;
396 3a227e9a 2021-03-18 op 		goto end;
397 3a227e9a 2021-03-18 op 	}
398 3a227e9a 2021-03-18 op 	fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
399 3a227e9a 2021-03-18 op 	fclose(f);
400 3a227e9a 2021-03-18 op 
401 3a227e9a 2021-03-18 op 	res = 0;
402 3a227e9a 2021-03-18 op end:
403 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
404 288fd238 2021-04-25 op 	    &res, sizeof(res));
405 288fd238 2021-04-25 op }
406 288fd238 2021-04-25 op 
407 288fd238 2021-04-25 op static void
408 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
409 288fd238 2021-04-25 op {
410 288fd238 2021-04-25 op 	FILE	*tmp, *f;
411 288fd238 2021-04-25 op 	struct	 tofu_entry entry;
412 288fd238 2021-04-25 op 	char	 sfn[PATH_MAX], *line = NULL, *t;
413 288fd238 2021-04-25 op 	size_t	 l, linesize = 0;
414 288fd238 2021-04-25 op 	ssize_t	 linelen;
415 288fd238 2021-04-25 op 	int	 fd, e, res = 0;
416 288fd238 2021-04-25 op 
417 288fd238 2021-04-25 op 	if (datalen != sizeof(entry))
418 288fd238 2021-04-25 op 		die();
419 288fd238 2021-04-25 op 	memcpy(&entry, imsg->data, datalen);
420 288fd238 2021-04-25 op 
421 288fd238 2021-04-25 op 	strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
422 288fd238 2021-04-25 op 	if ((fd = mkstemp(sfn)) == -1 ||
423 288fd238 2021-04-25 op 	    (tmp = fdopen(fd, "w")) == NULL) {
424 288fd238 2021-04-25 op 		if (fd != -1) {
425 288fd238 2021-04-25 op 			unlink(sfn);
426 288fd238 2021-04-25 op 			close(fd);
427 288fd238 2021-04-25 op 		}
428 288fd238 2021-04-25 op 		res = 0;
429 288fd238 2021-04-25 op 		goto end;
430 288fd238 2021-04-25 op 	}
431 288fd238 2021-04-25 op 
432 288fd238 2021-04-25 op 	if ((f = fopen(known_hosts_file, "r")) == NULL) {
433 288fd238 2021-04-25 op 		unlink(sfn);
434 288fd238 2021-04-25 op 		fclose(tmp);
435 288fd238 2021-04-25 op                 res = 0;
436 288fd238 2021-04-25 op 		goto end;
437 288fd238 2021-04-25 op 	}
438 288fd238 2021-04-25 op 
439 288fd238 2021-04-25 op 	l = strlen(entry.domain);
440 288fd238 2021-04-25 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
441 288fd238 2021-04-25 op 		if ((t = strstr(line, entry.domain)) != NULL &&
442 288fd238 2021-04-25 op 		    (line[l] == ' ' || line[l] == '\t'))
443 288fd238 2021-04-25 op 			continue;
444 288fd238 2021-04-25 op 		/* line has a trailing \n */
445 288fd238 2021-04-25 op 		fprintf(tmp, "%s", line);
446 288fd238 2021-04-25 op 	}
447 288fd238 2021-04-25 op 	fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
448 288fd238 2021-04-25 op 
449 288fd238 2021-04-25 op 	free(line);
450 288fd238 2021-04-25 op 	e = ferror(tmp);
451 288fd238 2021-04-25 op 
452 288fd238 2021-04-25 op 	fclose(tmp);
453 288fd238 2021-04-25 op 	fclose(f);
454 288fd238 2021-04-25 op 
455 288fd238 2021-04-25 op 	if (e) {
456 288fd238 2021-04-25 op 		unlink(sfn);
457 288fd238 2021-04-25 op 		res = 0;
458 288fd238 2021-04-25 op 		goto end;
459 288fd238 2021-04-25 op 	}
460 288fd238 2021-04-25 op 
461 288fd238 2021-04-25 op 	res = rename(sfn, known_hosts_file) != -1;
462 288fd238 2021-04-25 op 
463 288fd238 2021-04-25 op end:
464 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
465 3a227e9a 2021-03-18 op 	    &res, sizeof(res));
466 de2a69bb 2021-05-17 op }
467 de2a69bb 2021-05-17 op 
468 de2a69bb 2021-05-17 op static void
469 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
470 de2a69bb 2021-05-17 op {
471 de2a69bb 2021-05-17 op 	char	*path, *e;
472 de2a69bb 2021-05-17 op 	int	 fd;
473 de2a69bb 2021-05-17 op 
474 de2a69bb 2021-05-17 op 	path = imsg->data;
475 de2a69bb 2021-05-17 op 	if (path[datalen-1] != '\0')
476 de2a69bb 2021-05-17 op 		die();
477 de2a69bb 2021-05-17 op 
478 de2a69bb 2021-05-17 op 	if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
479 de2a69bb 2021-05-17 op 		e = strerror(errno);
480 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
481 de2a69bb 2021-05-17 op 		    e, strlen(e)+1);
482 de2a69bb 2021-05-17 op 	} else
483 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
484 de2a69bb 2021-05-17 op 		    NULL, 0);
485 3a227e9a 2021-03-18 op }
486 3a227e9a 2021-03-18 op 
487 3a227e9a 2021-03-18 op static void
488 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
489 c7107cec 2021-04-01 op {
490 c7107cec 2021-04-01 op 	if (datalen != 0)
491 c7107cec 2021-04-01 op 		die();
492 c7107cec 2021-04-01 op 
493 c7107cec 2021-04-01 op 	if ((session = fopen(session_file, "w")) == NULL)
494 c7107cec 2021-04-01 op 		die();
495 c7107cec 2021-04-01 op }
496 c7107cec 2021-04-01 op 
497 c7107cec 2021-04-01 op static void
498 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
499 c7107cec 2021-04-01 op {
500 f8c6e753 2021-12-30 op 	struct session_tab	tab;
501 58df4f47 2021-07-17 op 
502 c7107cec 2021-04-01 op 	if (session == NULL)
503 c7107cec 2021-04-01 op 		die();
504 c7107cec 2021-04-01 op 
505 f8c6e753 2021-12-30 op 	if (datalen != sizeof(tab))
506 c7107cec 2021-04-01 op 		die();
507 87e3e801 2021-07-17 op 
508 f8c6e753 2021-12-30 op 	memcpy(&tab, imsg->data, sizeof(tab));
509 f8c6e753 2021-12-30 op 	if (tab.uri[sizeof(tab.uri)-1] != '\0' ||
510 f8c6e753 2021-12-30 op 	    tab.title[sizeof(tab.title)-1] != '\0')
511 f8c6e753 2021-12-30 op 		die();
512 f8c6e753 2021-12-30 op 
513 f8c6e753 2021-12-30 op 	fprintf(session, "%s", tab.uri);
514 f8c6e753 2021-12-30 op 
515 f8c6e753 2021-12-30 op 	if (tab.flags & TAB_CURRENT)
516 2f524b17 2021-07-17 op 		fprintf(session, " current ");
517 2f524b17 2021-07-17 op 	else
518 2f524b17 2021-07-17 op 		fprintf(session, " - ");
519 87e3e801 2021-07-17 op 
520 f8c6e753 2021-12-30 op 	fprintf(session, "%s\n", tab.title);
521 c7107cec 2021-04-01 op }
522 c7107cec 2021-04-01 op 
523 c7107cec 2021-04-01 op static void
524 1040cc7f 2021-01-02 op handle_session_tab_hist(struct imsg *imsg, size_t datalen)
525 1040cc7f 2021-01-02 op {
526 1040cc7f 2021-01-02 op 	struct session_tab_hist th;
527 1040cc7f 2021-01-02 op 
528 1040cc7f 2021-01-02 op 	if (session == NULL)
529 1040cc7f 2021-01-02 op 		die();
530 1040cc7f 2021-01-02 op 
531 1040cc7f 2021-01-02 op 	if (datalen != sizeof(th))
532 1040cc7f 2021-01-02 op 		die();
533 1040cc7f 2021-01-02 op 
534 1040cc7f 2021-01-02 op 	memcpy(&th, imsg->data, sizeof(th));
535 1040cc7f 2021-01-02 op 	if (th.uri[sizeof(th.uri)-1] != '\0')
536 1040cc7f 2021-01-02 op 		die();
537 1040cc7f 2021-01-02 op 
538 1040cc7f 2021-01-02 op 	fprintf(session, "%s %s\n", th.future ? ">" : "<", th.uri);
539 1040cc7f 2021-01-02 op }
540 1040cc7f 2021-01-02 op 
541 1040cc7f 2021-01-02 op static void
542 c7107cec 2021-04-01 op handle_session_end(struct imsg *imsg, size_t datalen)
543 c7107cec 2021-04-01 op {
544 c7107cec 2021-04-01 op 	if (session == NULL)
545 c7107cec 2021-04-01 op 		die();
546 c7107cec 2021-04-01 op 	fclose(session);
547 c7107cec 2021-04-01 op 	session = NULL;
548 c7107cec 2021-04-01 op }
549 c7107cec 2021-04-01 op 
550 c7107cec 2021-04-01 op static void
551 1304bbdd 2021-03-15 op handle_dispatch_imsg(int fd, short ev, void *d)
552 35e1f40a 2021-03-14 op {
553 bc10f6a5 2021-07-12 op 	struct imsgev	*iev = d;
554 ea080950 2021-07-20 op 	int		 e;
555 ea080950 2021-07-20 op 
556 ea080950 2021-07-20 op 	if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
557 ea080950 2021-07-20 op 		/*
558 eb2ed626 2021-10-07 op 		 * This should leave a ~/.cache/telescope/crashed file to
559 ea080950 2021-07-20 op 		 * trigger about:crash on next run.  Unfortunately, if
560 ea080950 2021-07-20 op 		 * the main process dies the fs sticks around and
561 ea080950 2021-07-20 op 		 * doesn't notice that the fd was closed.  Why EV_READ
562 ea080950 2021-07-20 op 		 * is not triggered when a fd is closed on the other end?
563 ea080950 2021-07-20 op 		 */
564 ea080950 2021-07-20 op 		e = errno;
565 ea080950 2021-07-20 op 		if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
566 ea080950 2021-07-20 op 		    == -1)
567 ea080950 2021-07-20 op 			err(1, "open");
568 ea080950 2021-07-20 op 		close(fd);
569 ea080950 2021-07-20 op 		errx(1, "connection closed: %s", strerror(e));
570 ea080950 2021-07-20 op 	}
571 35e1f40a 2021-03-14 op }
572 35e1f40a 2021-03-14 op 
573 bc10f6a5 2021-07-12 op static int
574 bc10f6a5 2021-07-12 op fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
575 bc10f6a5 2021-07-12 op     uint16_t datalen)
576 bc10f6a5 2021-07-12 op {
577 bc10f6a5 2021-07-12 op 	return imsg_compose_event(iev_ui, type, peerid, 0, fd,
578 bc10f6a5 2021-07-12 op 	    data, datalen);
579 bc10f6a5 2021-07-12 op }
580 bc10f6a5 2021-07-12 op 
581 eb2ed626 2021-10-07 op static size_t
582 eb2ed626 2021-10-07 op join_path(char *buf, const char *lhs, const char *rhs, size_t buflen)
583 35e1f40a 2021-03-14 op {
584 eb2ed626 2021-10-07 op 	strlcpy(buf, lhs, buflen);
585 eb2ed626 2021-10-07 op 	return strlcat(buf, rhs, buflen);
586 eb2ed626 2021-10-07 op }
587 d0fd368a 2021-07-15 op 
588 eb2ed626 2021-10-07 op static void
589 eb2ed626 2021-10-07 op getenv_default(char *buf, const char *name, const char *def, size_t buflen)
590 eb2ed626 2021-10-07 op {
591 eb2ed626 2021-10-07 op 	size_t ret;
592 eb2ed626 2021-10-07 op 	char *home, *env;
593 740f578b 2021-03-15 op 
594 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
595 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
596 3a227e9a 2021-03-18 op 
597 eb2ed626 2021-10-07 op 	if ((env = getenv(name)) != NULL)
598 eb2ed626 2021-10-07 op 		ret = strlcpy(buf, env, buflen);
599 eb2ed626 2021-10-07 op 	else
600 eb2ed626 2021-10-07 op 		ret = join_path(buf, home, def, buflen);
601 288fd238 2021-04-25 op 
602 eb2ed626 2021-10-07 op 	if (ret >= buflen)
603 eb2ed626 2021-10-07 op 		errx(1, "buffer too small for %s", name);
604 eb2ed626 2021-10-07 op }
605 c7107cec 2021-04-01 op 
606 eb2ed626 2021-10-07 op static void
607 eb2ed626 2021-10-07 op mkdirs(const char *path, mode_t mode)
608 eb2ed626 2021-10-07 op {
609 444dad86 2021-10-07 op 	char copy[PATH_MAX+1], orig[PATH_MAX+1], *parent;
610 ea080950 2021-07-20 op 
611 eb2ed626 2021-10-07 op 	strlcpy(copy, path, sizeof(copy));
612 444dad86 2021-10-07 op 	strlcpy(orig, path, sizeof(orig));
613 eb2ed626 2021-10-07 op 	parent = dirname(copy);
614 eb2ed626 2021-10-07 op 	if (!strcmp(parent, "/"))
615 eb2ed626 2021-10-07 op 		return;
616 eb2ed626 2021-10-07 op 	mkdirs(parent, mode);
617 eb2ed626 2021-10-07 op 
618 444dad86 2021-10-07 op 	if (mkdir(orig, mode) != 0) {
619 eb2ed626 2021-10-07 op 		if (errno == EEXIST)
620 eb2ed626 2021-10-07 op 			return;
621 444dad86 2021-10-07 op 		err(1, "can't mkdir %s", orig);
622 eb2ed626 2021-10-07 op 	}
623 eb2ed626 2021-10-07 op }
624 eb2ed626 2021-10-07 op 
625 eb2ed626 2021-10-07 op static void
626 eb2ed626 2021-10-07 op xdg_init(void)
627 eb2ed626 2021-10-07 op {
628 eb2ed626 2021-10-07 op 	char *home, old_path[PATH_MAX];
629 eb2ed626 2021-10-07 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 eb2ed626 2021-10-07 op 	xdg_init();
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 bb28f1c2 2021-12-30 op parse_session_line(char *line, const char **title, uint32_t *flags)
701 bb28f1c2 2021-12-30 op {
702 bb28f1c2 2021-12-30 op 	char *s, *t, *ap;
703 bb28f1c2 2021-12-30 op 
704 bb28f1c2 2021-12-30 op 	*title = "";
705 bb28f1c2 2021-12-30 op 	*flags = 0;
706 bb28f1c2 2021-12-30 op 	if ((s = strchr(line, ' ')) == NULL)
707 bb28f1c2 2021-12-30 op 		return;
708 3a227e9a 2021-03-18 op 
709 bb28f1c2 2021-12-30 op 	*s++ = '\0';
710 bb28f1c2 2021-12-30 op 
711 bb28f1c2 2021-12-30 op 	if ((t = strchr(s, ' ')) != NULL) {
712 bb28f1c2 2021-12-30 op 		*t++ = '\0';
713 bb28f1c2 2021-12-30 op 		*title = t;
714 bb28f1c2 2021-12-30 op 	}
715 bb28f1c2 2021-12-30 op 
716 bb28f1c2 2021-12-30 op 	while ((ap = strsep(&s, ",")) != NULL) {
717 bb28f1c2 2021-12-30 op 		if (!strcmp(ap, "current"))
718 bb28f1c2 2021-12-30 op 			*flags |= TAB_CURRENT;
719 bb28f1c2 2021-12-30 op 	}
720 bb28f1c2 2021-12-30 op }
721 bb28f1c2 2021-12-30 op 
722 bb28f1c2 2021-12-30 op static inline void
723 bb28f1c2 2021-12-30 op sendtab(uint32_t flags, const char *uri, const char *title)
724 bb28f1c2 2021-12-30 op {
725 bb28f1c2 2021-12-30 op 	struct session_tab tab;
726 bb28f1c2 2021-12-30 op 
727 bb28f1c2 2021-12-30 op 	memset(&tab, 0, sizeof(tab));
728 bb28f1c2 2021-12-30 op 	tab.flags = flags;
729 bb28f1c2 2021-12-30 op 
730 bb28f1c2 2021-12-30 op 	if (strlcpy(tab.uri, uri, sizeof(tab.uri)) >= sizeof(tab.uri))
731 bb28f1c2 2021-12-30 op 		return;
732 bb28f1c2 2021-12-30 op 
733 bb28f1c2 2021-12-30 op 	/* don't worry about cached title truncation */
734 bb28f1c2 2021-12-30 op 	if (title != NULL)
735 bb28f1c2 2021-12-30 op 		strlcpy(tab.title, title, sizeof(tab.title));
736 bb28f1c2 2021-12-30 op 
737 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_TAB, 0, -1, &tab, sizeof(tab));
738 1040cc7f 2021-01-02 op }
739 1040cc7f 2021-01-02 op 
740 1040cc7f 2021-01-02 op static inline void
741 1040cc7f 2021-01-02 op sendhist(const char *uri, int future)
742 1040cc7f 2021-01-02 op {
743 1040cc7f 2021-01-02 op 	struct session_tab_hist sth;
744 1040cc7f 2021-01-02 op 
745 1040cc7f 2021-01-02 op 	memset(&sth, 0, sizeof(sth));
746 1040cc7f 2021-01-02 op 	sth.future = future;
747 1040cc7f 2021-01-02 op 
748 1040cc7f 2021-01-02 op 	if (strlcpy(sth.uri, uri, sizeof(sth.uri)) >= sizeof(sth.uri))
749 1040cc7f 2021-01-02 op 		return;
750 1040cc7f 2021-01-02 op 
751 1040cc7f 2021-01-02 op 	fs_send_ui(IMSG_SESSION_TAB_HIST, 0, -1, &sth, sizeof(sth));
752 bb28f1c2 2021-12-30 op }
753 bb28f1c2 2021-12-30 op 
754 bb28f1c2 2021-12-30 op static void
755 50f03682 2022-01-03 op load_last_session(void)
756 bb28f1c2 2021-12-30 op {
757 bb28f1c2 2021-12-30 op 	FILE		*session;
758 bb28f1c2 2021-12-30 op 	uint32_t	 flags;
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 bb28f1c2 2021-12-30 op 	const char	*title;
764 1040cc7f 2021-01-02 op 	char		*nl, *s, *line = NULL;
765 bb28f1c2 2021-12-30 op 
766 bb28f1c2 2021-12-30 op 	if ((session = fopen(session_file, "r")) == NULL) {
767 bb28f1c2 2021-12-30 op 		/* first time? */
768 bb28f1c2 2021-12-30 op 		first_time = 1;
769 bb28f1c2 2021-12-30 op 		goto end;
770 bb28f1c2 2021-12-30 op 	}
771 bb28f1c2 2021-12-30 op 
772 bb28f1c2 2021-12-30 op 	while ((linelen = getline(&line, &linesize, session)) != -1) {
773 bb28f1c2 2021-12-30 op 		if ((nl = strchr(line, '\n')) != NULL)
774 bb28f1c2 2021-12-30 op 			*nl = '\0';
775 1040cc7f 2021-01-02 op 
776 1040cc7f 2021-01-02 op 		if (*line == '<' || *line == '>') {
777 1040cc7f 2021-01-02 op 			future = *line == '>';
778 1040cc7f 2021-01-02 op 			s = line+1;
779 1040cc7f 2021-01-02 op 			if (*s != ' ')
780 1040cc7f 2021-01-02 op 				continue;
781 1040cc7f 2021-01-02 op 			sendhist(++s, future);
782 1040cc7f 2021-01-02 op 		} else {
783 1040cc7f 2021-01-02 op 			parse_session_line(line, &title, &flags);
784 1040cc7f 2021-01-02 op 			sendtab(flags, line, title);
785 1040cc7f 2021-01-02 op 		}
786 bb28f1c2 2021-12-30 op 	}
787 bb28f1c2 2021-12-30 op 
788 bb28f1c2 2021-12-30 op 	fclose(session);
789 bb28f1c2 2021-12-30 op 	free(line);
790 bb28f1c2 2021-12-30 op 
791 bb28f1c2 2021-12-30 op 	if (last_time_crashed())
792 bb28f1c2 2021-12-30 op 		sendtab(TAB_CURRENT, "about:crash", NULL);
793 bb28f1c2 2021-12-30 op 
794 bb28f1c2 2021-12-30 op end:
795 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_END, 0, -1, &first_time, sizeof(first_time));
796 bb28f1c2 2021-12-30 op }
797 bb28f1c2 2021-12-30 op 
798 3a227e9a 2021-03-18 op int
799 6cc5fcfe 2021-07-08 op fs_main(void)
800 3a227e9a 2021-03-18 op {
801 6cc5fcfe 2021-07-08 op 	setproctitle("fs");
802 3a227e9a 2021-03-18 op 
803 6cc5fcfe 2021-07-08 op 	fs_init();
804 6cc5fcfe 2021-07-08 op 
805 35e1f40a 2021-03-14 op 	event_init();
806 35e1f40a 2021-03-14 op 
807 bc10f6a5 2021-07-12 op 	/* Setup pipe and event handler to the main process */
808 bc10f6a5 2021-07-12 op 	if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
809 6cc5fcfe 2021-07-08 op 		die();
810 bc10f6a5 2021-07-12 op 	imsg_init(&iev_ui->ibuf, 3);
811 bc10f6a5 2021-07-12 op 	iev_ui->handler = handle_dispatch_imsg;
812 bc10f6a5 2021-07-12 op 	iev_ui->events = EV_READ;
813 bc10f6a5 2021-07-12 op 	event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
814 bc10f6a5 2021-07-12 op 	    iev_ui->handler, iev_ui);
815 bc10f6a5 2021-07-12 op 	event_add(&iev_ui->ev, NULL);
816 35e1f40a 2021-03-14 op 
817 35e1f40a 2021-03-14 op 	sandbox_fs_process();
818 35e1f40a 2021-03-14 op 
819 35e1f40a 2021-03-14 op 	event_dispatch();
820 35e1f40a 2021-03-14 op 	return 0;
821 35e1f40a 2021-03-14 op }
822 3a227e9a 2021-03-18 op 
823 3a227e9a 2021-03-18 op 
824 d0fd368a 2021-07-15 op 
825 be97d6e6 2021-08-15 op /*
826 be97d6e6 2021-08-15 op  * Check if the last time telescope crashed.  The check is done by
827 be97d6e6 2021-08-15 op  * looking at `crashed_file': if it exists then last time we crashed.
828 be97d6e6 2021-08-15 op  * Then, while here, touch the file too.  During IMSG_QUIT we'll
829 be97d6e6 2021-08-15 op  * remove it.
830 be97d6e6 2021-08-15 op  */
831 d0fd368a 2021-07-15 op int
832 b6171794 2021-07-20 op last_time_crashed(void)
833 b6171794 2021-07-20 op {
834 be97d6e6 2021-08-15 op 	int fd, crashed = 1;
835 b6171794 2021-07-20 op 
836 2b409042 2021-09-15 op 	if (safe_mode)
837 2b409042 2021-09-15 op 		return 0;
838 2b409042 2021-09-15 op 
839 be97d6e6 2021-08-15 op 	if (unlink(crashed_file) == -1 && errno == ENOENT)
840 be97d6e6 2021-08-15 op 		crashed = 0;
841 be97d6e6 2021-08-15 op 
842 be97d6e6 2021-08-15 op 	if ((fd = open(crashed_file, O_CREAT|O_WRONLY, 0600)) == -1)
843 be97d6e6 2021-08-15 op 		return crashed;
844 b6171794 2021-07-20 op 	close(fd);
845 be97d6e6 2021-08-15 op 
846 be97d6e6 2021-08-15 op 	return crashed;
847 b6171794 2021-07-20 op }
848 b6171794 2021-07-20 op 
849 b6171794 2021-07-20 op int
850 d0fd368a 2021-07-15 op lock_session(void)
851 d0fd368a 2021-07-15 op {
852 d0fd368a 2021-07-15 op 	struct flock	lock;
853 d0fd368a 2021-07-15 op 	int		fd;
854 d0fd368a 2021-07-15 op 
855 d0fd368a 2021-07-15 op 	if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
856 d0fd368a 2021-07-15 op 		return -1;
857 d0fd368a 2021-07-15 op 
858 d0fd368a 2021-07-15 op 	lock.l_start = 0;
859 d0fd368a 2021-07-15 op 	lock.l_len = 0;
860 d0fd368a 2021-07-15 op 	lock.l_type = F_WRLCK;
861 d0fd368a 2021-07-15 op 	lock.l_whence = SEEK_SET;
862 c6d03cf5 2021-04-25 op 
863 d0fd368a 2021-07-15 op 	if (fcntl(fd, F_SETLK, &lock) == -1) {
864 d0fd368a 2021-07-15 op 		close(fd);
865 d0fd368a 2021-07-15 op 		return -1;
866 d0fd368a 2021-07-15 op 	}
867 d0fd368a 2021-07-15 op 
868 d0fd368a 2021-07-15 op 	return fd;
869 d0fd368a 2021-07-15 op }
870 d0fd368a 2021-07-15 op 
871 6400962b 2022-01-03 op static inline int
872 c6d03cf5 2021-04-25 op parse_khost_line(char *line, char *tmp[3])
873 c6d03cf5 2021-04-25 op {
874 c6d03cf5 2021-04-25 op 	char **ap;
875 c6d03cf5 2021-04-25 op 
876 c6d03cf5 2021-04-25 op 	for (ap = tmp; ap < &tmp[3] &&
877 c6d03cf5 2021-04-25 op 	    (*ap = strsep(&line, " \t\n")) != NULL;) {
878 c6d03cf5 2021-04-25 op 		if (**ap != '\0')
879 c6d03cf5 2021-04-25 op 			ap++;
880 c6d03cf5 2021-04-25 op 	}
881 3a227e9a 2021-03-18 op 
882 c6d03cf5 2021-04-25 op 	return ap == &tmp[3] && *line == '\0';
883 c6d03cf5 2021-04-25 op }
884 c6d03cf5 2021-04-25 op 
885 eb722b50 2022-01-03 op static void
886 eb722b50 2022-01-03 op load_certs(void)
887 3a227e9a 2021-03-18 op {
888 c6d03cf5 2021-04-25 op 	char		*tmp[3], *line = NULL;
889 6cd6a9e1 2021-03-20 op 	const char	*errstr;
890 ec1fa0b0 2021-04-25 op 	size_t		 lineno = 0, linesize = 0;
891 3a227e9a 2021-03-18 op 	ssize_t		 linelen;
892 3a227e9a 2021-03-18 op 	FILE		*f;
893 eb722b50 2022-01-03 op 	struct tofu_entry e;
894 3a227e9a 2021-03-18 op 
895 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "r")) == NULL)
896 eb722b50 2022-01-03 op 		return;
897 3a227e9a 2021-03-18 op 
898 3a227e9a 2021-03-18 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
899 ec1fa0b0 2021-04-25 op 		lineno++;
900 3a227e9a 2021-03-18 op 
901 eb722b50 2022-01-03 op 		memset(&e, 0, sizeof(e));
902 eb722b50 2022-01-03 op 		if (parse_khost_line(line, tmp)) {
903 eb722b50 2022-01-03 op 			strlcpy(e.domain, tmp[0], sizeof(e.domain));
904 eb722b50 2022-01-03 op 			strlcpy(e.hash, tmp[1], sizeof(e.hash));
905 3a227e9a 2021-03-18 op 
906 eb722b50 2022-01-03 op 			e.verified = strtonum(tmp[2], 0, 1, &errstr);
907 c6d03cf5 2021-04-25 op 			if (errstr != NULL)
908 c6d03cf5 2021-04-25 op 				errx(1, "%s:%zu verification for %s is %s: %s",
909 c6d03cf5 2021-04-25 op 				    known_hosts_file, lineno,
910 eb722b50 2022-01-03 op 				    e.domain, errstr, tmp[2]);
911 eb722b50 2022-01-03 op 
912 eb722b50 2022-01-03 op 			fs_send_ui(IMSG_TOFU, 0, -1, &e, sizeof(e));
913 c6d03cf5 2021-04-25 op 		} else {
914 ec1fa0b0 2021-04-25 op 			warnx("%s:%zu invalid entry",
915 ec1fa0b0 2021-04-25 op 			    known_hosts_file, lineno);
916 c6d03cf5 2021-04-25 op 		}
917 3a227e9a 2021-03-18 op 	}
918 3a227e9a 2021-03-18 op 
919 3a227e9a 2021-03-18 op 	free(line);
920 eb722b50 2022-01-03 op 	fclose(f);
921 eb722b50 2022-01-03 op 	return;
922 3a227e9a 2021-03-18 op }
923 c7107cec 2021-04-01 op