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 6c8ddace 2022-01-03 op static void		 init_paths(void);
 62 50f03682 2022-01-03 op static void		 load_last_session(void);
 63 83ed72f1 2022-01-03 op static int		 last_time_crashed(void);
 64 eb722b50 2022-01-03 op static void		 load_certs(void);
 65 35e1f40a 2021-03-14 op 
 66 bc10f6a5 2021-07-12 op static struct imsgev		*iev_ui;
 67 c7107cec 2021-04-01 op static FILE			*session;
 68 eb2ed626 2021-10-07 op 
 69 f88fbabc 2021-11-27 op /*
 70 f88fbabc 2021-11-27 op  * Where to store user data.  These are all equal to ~/.telescope if
 71 f88fbabc 2021-11-27 op  * it exists.
 72 f88fbabc 2021-11-27 op  */
 73 fb3d08c1 2021-10-07 op char		config_path_base[PATH_MAX];
 74 fb3d08c1 2021-10-07 op char		data_path_base[PATH_MAX];
 75 fb3d08c1 2021-10-07 op char		cache_path_base[PATH_MAX];
 76 eb2ed626 2021-10-07 op 
 77 eb2ed626 2021-10-07 op char		config_path[PATH_MAX];
 78 fb3d08c1 2021-10-07 op char		lockfile_path[PATH_MAX];
 79 fb3d08c1 2021-10-07 op char		bookmark_file[PATH_MAX];
 80 fb3d08c1 2021-10-07 op char		known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
 81 fb3d08c1 2021-10-07 op char		crashed_file[PATH_MAX];
 82 fb3d08c1 2021-10-07 op char		session_file[PATH_MAX];
 83 740f578b 2021-03-15 op 
 84 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
 85 35e1f40a 2021-03-14 op 	[IMSG_GET] = handle_get,
 86 fb4dc49f 2021-08-13 op 	[IMSG_GET_FILE] = handle_get_file,
 87 50f03682 2022-01-03 op 	[IMSG_QUIT] = handle_misc,
 88 50f03682 2022-01-03 op 	[IMSG_INIT] = handle_misc,
 89 740f578b 2021-03-15 op 	[IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
 90 3a227e9a 2021-03-18 op 	[IMSG_SAVE_CERT] = handle_save_cert,
 91 288fd238 2021-04-25 op 	[IMSG_UPDATE_CERT] = handle_update_cert,
 92 de2a69bb 2021-05-17 op 	[IMSG_FILE_OPEN] = handle_file_open,
 93 c7107cec 2021-04-01 op 	[IMSG_SESSION_START] = handle_session_start,
 94 c7107cec 2021-04-01 op 	[IMSG_SESSION_TAB] = handle_session_tab,
 95 1040cc7f 2021-01-02 op 	[IMSG_SESSION_TAB_HIST] = handle_session_tab_hist,
 96 c7107cec 2021-04-01 op 	[IMSG_SESSION_END] = handle_session_end,
 97 35e1f40a 2021-03-14 op };
 98 35e1f40a 2021-03-14 op 
 99 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
100 35e1f40a 2021-03-14 op die(void)
101 35e1f40a 2021-03-14 op {
102 35e1f40a 2021-03-14 op 	abort(); 		/* TODO */
103 35e1f40a 2021-03-14 op }
104 35e1f40a 2021-03-14 op 
105 35e1f40a 2021-03-14 op static void
106 fb4dc49f 2021-08-13 op send_file(uint32_t peerid, FILE *f)
107 fb4dc49f 2021-08-13 op {
108 fb4dc49f 2021-08-13 op 	ssize_t	 r;
109 fb4dc49f 2021-08-13 op 	char	 buf[BUFSIZ];
110 fb4dc49f 2021-08-13 op 
111 fb4dc49f 2021-08-13 op 	for (;;) {
112 fb4dc49f 2021-08-13 op 		r = fread(buf, 1, sizeof(buf), f);
113 fb4dc49f 2021-08-13 op 		if (r != 0)
114 fb4dc49f 2021-08-13 op 			fs_send_ui(IMSG_BUF, peerid, -1, buf, r);
115 fb4dc49f 2021-08-13 op 		if (r != sizeof(buf))
116 fb4dc49f 2021-08-13 op 			break;
117 fb4dc49f 2021-08-13 op 	}
118 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
119 fb4dc49f 2021-08-13 op 	fclose(f);
120 fb4dc49f 2021-08-13 op }
121 fb4dc49f 2021-08-13 op 
122 fb4dc49f 2021-08-13 op static void
123 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
124 35e1f40a 2021-03-14 op {
125 56e7efb4 2021-07-21 op 	const char	*bpath = "bookmarks.gmi";
126 fb4dc49f 2021-08-13 op 	char		 path[PATH_MAX];
127 56e7efb4 2021-07-21 op 	FILE		*f;
128 a2728733 2021-07-18 op 	const char	*data, *p;
129 a2728733 2021-07-18 op 	size_t		 i;
130 a2728733 2021-07-18 op 	struct page {
131 a2728733 2021-07-18 op 		const char	*name;
132 56e7efb4 2021-07-21 op 		const char	*path;
133 a2728733 2021-07-18 op 		const uint8_t	*data;
134 a2728733 2021-07-18 op 		size_t		 len;
135 a2728733 2021-07-18 op 	} pages[] = {
136 56e7efb4 2021-07-21 op 		{"about",	NULL,	about_about,	about_about_len},
137 56e7efb4 2021-07-21 op 		{"blank",	NULL,	about_blank,	about_blank_len},
138 56e7efb4 2021-07-21 op 		{"bookmarks",	bpath,	bookmarks,	bookmarks_len},
139 56e7efb4 2021-07-21 op 		{"crash",	NULL,	about_crash,	about_crash_len},
140 56e7efb4 2021-07-21 op 		{"help",	NULL,	about_help,	about_help_len},
141 56e7efb4 2021-07-21 op 		{"license",	NULL,	about_license,	about_license_len},
142 56e7efb4 2021-07-21 op 		{"new",		NULL,	about_new,	about_new_len},
143 56e7efb4 2021-07-21 op 	}, *page = NULL;
144 35e1f40a 2021-03-14 op 
145 35e1f40a 2021-03-14 op 	data = imsg->data;
146 56e7efb4 2021-07-21 op 	if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
147 35e1f40a 2021-03-14 op 		die();
148 56e7efb4 2021-07-21 op 	if ((data = strchr(data, ':')) == NULL)
149 56e7efb4 2021-07-21 op 		goto notfound;
150 56e7efb4 2021-07-21 op 	data++;
151 35e1f40a 2021-03-14 op 
152 56e7efb4 2021-07-21 op 	for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
153 56e7efb4 2021-07-21 op 		if (!strcmp(data, pages[i].name)) {
154 56e7efb4 2021-07-21 op 			page = &pages[i];
155 56e7efb4 2021-07-21 op 			break;
156 56e7efb4 2021-07-21 op 		}
157 56e7efb4 2021-07-21 op 
158 56e7efb4 2021-07-21 op 	if (page == NULL)
159 56e7efb4 2021-07-21 op 		goto notfound;
160 56e7efb4 2021-07-21 op 
161 de04b178 2021-11-26 op 	strlcpy(path, data_path_base, sizeof(path));
162 56e7efb4 2021-07-21 op 	strlcat(path, "/", sizeof(path));
163 56e7efb4 2021-07-21 op 	if (page->path != NULL)
164 56e7efb4 2021-07-21 op 		strlcat(path, page->path, sizeof(path));
165 56e7efb4 2021-07-21 op 	else {
166 56e7efb4 2021-07-21 op 		strlcat(path, "pages/about_", sizeof(path));
167 56e7efb4 2021-07-21 op 		strlcat(path, page->name, sizeof(path));
168 56e7efb4 2021-07-21 op 		strlcat(path, ".gmi", sizeof(path));
169 56e7efb4 2021-07-21 op 	}
170 56e7efb4 2021-07-21 op 
171 56e7efb4 2021-07-21 op 	if ((f = fopen(path, "r")) == NULL) {
172 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
173 56e7efb4 2021-07-21 op 		    page->data, page->len);
174 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
175 56e7efb4 2021-07-21 op 		    NULL, 0);
176 a2728733 2021-07-18 op 		return;
177 35e1f40a 2021-03-14 op 	}
178 a2728733 2021-07-18 op 
179 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
180 56e7efb4 2021-07-21 op 	return;
181 56e7efb4 2021-07-21 op 
182 56e7efb4 2021-07-21 op notfound:
183 a2728733 2021-07-18 op 	p = "# not found!\n";
184 a2728733 2021-07-18 op 	fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
185 a2728733 2021-07-18 op 	fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
186 fb4dc49f 2021-08-13 op }
187 fb4dc49f 2021-08-13 op 
188 fb4dc49f 2021-08-13 op static inline void
189 fb4dc49f 2021-08-13 op send_hdr(uint32_t peerid, int code, const char *meta)
190 fb4dc49f 2021-08-13 op {
191 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_CODE, peerid, -1, &code, sizeof(code));
192 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_META, peerid, -1, meta, strlen(meta)+1);
193 fb4dc49f 2021-08-13 op }
194 fb4dc49f 2021-08-13 op 
195 24a68158 2021-08-13 op static inline void
196 24a68158 2021-08-13 op send_errno(uint32_t peerid, int code, const char *str, int no)
197 24a68158 2021-08-13 op {
198 24a68158 2021-08-13 op 	char *s;
199 24a68158 2021-08-13 op 
200 24a68158 2021-08-13 op 	if (asprintf(&s, "%s: %s", str, strerror(no)) == -1)
201 24a68158 2021-08-13 op 		s = NULL;
202 24a68158 2021-08-13 op 
203 24a68158 2021-08-13 op 	send_hdr(peerid, code, s == NULL ? str : s);
204 24a68158 2021-08-13 op 	free(s);
205 24a68158 2021-08-13 op }
206 24a68158 2021-08-13 op 
207 65124267 2021-08-13 op static inline const char *
208 65124267 2021-08-13 op file_type(const char *path)
209 fb4dc49f 2021-08-13 op {
210 fb4dc49f 2021-08-13 op 	struct mapping {
211 fb4dc49f 2021-08-13 op 		const char	*ext;
212 fb4dc49f 2021-08-13 op 		const char	*mime;
213 fb4dc49f 2021-08-13 op 	} ms[] = {
214 fb4dc49f 2021-08-13 op 		{"diff",	"text/x-patch"},
215 fb4dc49f 2021-08-13 op 		{"gemini",	"text/gemini"},
216 fb4dc49f 2021-08-13 op 		{"gmi",		"text/gemini"},
217 fb4dc49f 2021-08-13 op 		{"markdown",	"text/plain"},
218 fb4dc49f 2021-08-13 op 		{"md",		"text/plain"},
219 fb4dc49f 2021-08-13 op 		{"patch",	"text/x-patch"},
220 fb4dc49f 2021-08-13 op 		{"txt",		"text/plain"},
221 fb4dc49f 2021-08-13 op 		{NULL, NULL},
222 65124267 2021-08-13 op 	}, *m;
223 65124267 2021-08-13 op 	char *dot;
224 65124267 2021-08-13 op 
225 65124267 2021-08-13 op 	if ((dot = strrchr(path, '.')) == NULL)
226 65124267 2021-08-13 op 		return NULL;
227 65124267 2021-08-13 op 
228 65124267 2021-08-13 op 	dot++;
229 65124267 2021-08-13 op 
230 65124267 2021-08-13 op 	for (m = ms; m->ext != NULL; ++m)
231 65124267 2021-08-13 op 		if (!strcmp(m->ext, dot))
232 65124267 2021-08-13 op 			return m->mime;
233 65124267 2021-08-13 op 
234 65124267 2021-08-13 op 	return NULL;
235 5cbe1763 2021-08-13 op }
236 5cbe1763 2021-08-13 op 
237 5cbe1763 2021-08-13 op static int
238 5cbe1763 2021-08-13 op select_non_dot(const struct dirent *d)
239 5cbe1763 2021-08-13 op {
240 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".");
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_dotdot(const struct dirent *d)
245 5cbe1763 2021-08-13 op {
246 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".") && strcmp(d->d_name, "..");
247 65124267 2021-08-13 op }
248 65124267 2021-08-13 op 
249 65124267 2021-08-13 op static inline void
250 65124267 2021-08-13 op send_dir(uint32_t peerid, const char *path)
251 65124267 2021-08-13 op {
252 65124267 2021-08-13 op 	struct dirent	**names;
253 65124267 2021-08-13 op 	struct evbuffer	 *ev;
254 5d43215b 2021-08-13 op 	char		 *s;
255 5cbe1763 2021-08-13 op 	int		(*selector)(const struct dirent *) = select_non_dot;
256 24a68158 2021-08-13 op 	int		  i, len, no;
257 65124267 2021-08-13 op 
258 5d43215b 2021-08-13 op 	if (!has_suffix(path, "/")) {
259 5d43215b 2021-08-13 op 		if (asprintf(&s, "%s/", path) == -1)
260 5d43215b 2021-08-13 op 			die();
261 5d43215b 2021-08-13 op 		send_hdr(peerid, 30, s);
262 5d43215b 2021-08-13 op 		free(s);
263 5d43215b 2021-08-13 op 		return;
264 5d43215b 2021-08-13 op 	}
265 5d43215b 2021-08-13 op 
266 5cbe1763 2021-08-13 op 	if (!strcmp(path, "/"))
267 5cbe1763 2021-08-13 op 		selector = select_non_dotdot;
268 5cbe1763 2021-08-13 op 
269 65124267 2021-08-13 op 	if ((ev = evbuffer_new()) == NULL ||
270 5cbe1763 2021-08-13 op 	    (len = scandir(path, &names, selector, alphasort)) == -1) {
271 24a68158 2021-08-13 op 		no = errno;
272 65124267 2021-08-13 op 		evbuffer_free(ev);
273 24a68158 2021-08-13 op 		send_errno(peerid, 40, "failure reading the directory", no);
274 65124267 2021-08-13 op 		return;
275 65124267 2021-08-13 op 	}
276 65124267 2021-08-13 op 
277 65124267 2021-08-13 op 	evbuffer_add_printf(ev, "# Index of %s\n\n", path);
278 65124267 2021-08-13 op 	for (i = 0; i < len; ++i) {
279 65124267 2021-08-13 op 		evbuffer_add_printf(ev, "=> %s", names[i]->d_name);
280 65124267 2021-08-13 op 		if (names[i]->d_type == DT_DIR)
281 65124267 2021-08-13 op 			evbuffer_add(ev, "/", 1);
282 65124267 2021-08-13 op 		evbuffer_add(ev, "\n", 1);
283 65124267 2021-08-13 op 	}
284 65124267 2021-08-13 op 
285 65124267 2021-08-13 op 	send_hdr(peerid, 20, "text/gemini");
286 65124267 2021-08-13 op 	fs_send_ui(IMSG_BUF, peerid, -1,
287 65124267 2021-08-13 op 	    EVBUFFER_DATA(ev), EVBUFFER_LENGTH(ev));
288 65124267 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
289 65124267 2021-08-13 op 
290 65124267 2021-08-13 op 	evbuffer_free(ev);
291 65124267 2021-08-13 op 	free(names);
292 65124267 2021-08-13 op }
293 65124267 2021-08-13 op 
294 65124267 2021-08-13 op static void
295 65124267 2021-08-13 op handle_get_file(struct imsg *imsg, size_t datalen)
296 65124267 2021-08-13 op {
297 65124267 2021-08-13 op 	struct stat	 sb;
298 fb4dc49f 2021-08-13 op 	FILE		*f;
299 65124267 2021-08-13 op 	char		*data;
300 fb4dc49f 2021-08-13 op 	const char	*meta = NULL;
301 fb4dc49f 2021-08-13 op 
302 fb4dc49f 2021-08-13 op 	data = imsg->data;
303 fb4dc49f 2021-08-13 op 	data[datalen-1] = '\0';
304 fb4dc49f 2021-08-13 op 
305 65124267 2021-08-13 op 	if ((f = fopen(data, "r")) == NULL) {
306 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 51, "can't open", errno);
307 fb4dc49f 2021-08-13 op 		return;
308 fb4dc49f 2021-08-13 op 	}
309 fb4dc49f 2021-08-13 op 
310 65124267 2021-08-13 op 	if (fstat(fileno(f), &sb) == -1) {
311 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 40, "fstat", errno);
312 65124267 2021-08-13 op 		return;
313 fb4dc49f 2021-08-13 op 	}
314 fb4dc49f 2021-08-13 op 
315 65124267 2021-08-13 op 	if (S_ISDIR(sb.st_mode)) {
316 65124267 2021-08-13 op 		fclose(f);
317 65124267 2021-08-13 op 		send_dir(imsg->hdr.peerid, data);
318 fb4dc49f 2021-08-13 op 		return;
319 fb4dc49f 2021-08-13 op 	}
320 fb4dc49f 2021-08-13 op 
321 65124267 2021-08-13 op 	if ((meta = file_type(data)) == NULL) {
322 65124267 2021-08-13 op 		fclose(f);
323 65124267 2021-08-13 op 		send_hdr(imsg->hdr.peerid, 51,
324 65124267 2021-08-13 op 		    "don't know how to visualize this file");
325 fb4dc49f 2021-08-13 op 		return;
326 fb4dc49f 2021-08-13 op 	}
327 fb4dc49f 2021-08-13 op 
328 fb4dc49f 2021-08-13 op 	send_hdr(imsg->hdr.peerid, 20, meta);
329 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
330 35e1f40a 2021-03-14 op }
331 35e1f40a 2021-03-14 op 
332 35e1f40a 2021-03-14 op static void
333 50f03682 2022-01-03 op handle_misc(struct imsg *imsg, size_t datalen)
334 50f03682 2022-01-03 op {
335 50f03682 2022-01-03 op 	switch (imsg->hdr.type) {
336 50f03682 2022-01-03 op 	case IMSG_INIT:
337 eb722b50 2022-01-03 op 		load_certs();
338 50f03682 2022-01-03 op 		load_last_session();
339 50f03682 2022-01-03 op 		break;
340 be97d6e6 2021-08-15 op 
341 50f03682 2022-01-03 op 	case IMSG_QUIT:
342 50f03682 2022-01-03 op 		if (!safe_mode)
343 50f03682 2022-01-03 op 			unlink(crashed_file);
344 50f03682 2022-01-03 op 		event_loopbreak();
345 50f03682 2022-01-03 op 		break;
346 50f03682 2022-01-03 op 
347 50f03682 2022-01-03 op 	default:
348 50f03682 2022-01-03 op 		die();
349 50f03682 2022-01-03 op 	}
350 35e1f40a 2021-03-14 op }
351 35e1f40a 2021-03-14 op 
352 35e1f40a 2021-03-14 op static void
353 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
354 740f578b 2021-03-15 op {
355 740f578b 2021-03-15 op 	char	*data;
356 740f578b 2021-03-15 op 	int	 res;
357 740f578b 2021-03-15 op 	FILE	*f;
358 740f578b 2021-03-15 op 
359 740f578b 2021-03-15 op 	data = imsg->data;
360 740f578b 2021-03-15 op 	if (data[datalen-1] != '\0')
361 740f578b 2021-03-15 op 		die();
362 740f578b 2021-03-15 op 
363 740f578b 2021-03-15 op 	if ((f = fopen(bookmark_file, "a")) == NULL) {
364 740f578b 2021-03-15 op 		res = errno;
365 740f578b 2021-03-15 op 		goto end;
366 740f578b 2021-03-15 op 	}
367 740f578b 2021-03-15 op 	fprintf(f, "=> %s\n", data);
368 740f578b 2021-03-15 op 	fclose(f);
369 740f578b 2021-03-15 op 
370 740f578b 2021-03-15 op 	res = 0;
371 740f578b 2021-03-15 op end:
372 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
373 740f578b 2021-03-15 op }
374 740f578b 2021-03-15 op 
375 740f578b 2021-03-15 op static void
376 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
377 3a227e9a 2021-03-18 op {
378 3a227e9a 2021-03-18 op 	struct tofu_entry	 e;
379 3a227e9a 2021-03-18 op 	FILE			*f;
380 3a227e9a 2021-03-18 op 	int			 res;
381 3a227e9a 2021-03-18 op 
382 3a227e9a 2021-03-18 op 	/* TODO: traverse the file to avoid duplications? */
383 3a227e9a 2021-03-18 op 
384 3a227e9a 2021-03-18 op 	if (datalen != sizeof(e))
385 3a227e9a 2021-03-18 op 		die();
386 3a227e9a 2021-03-18 op 	memcpy(&e, imsg->data, datalen);
387 3a227e9a 2021-03-18 op 
388 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "a")) == NULL) {
389 3a227e9a 2021-03-18 op 		res = errno;
390 3a227e9a 2021-03-18 op 		goto end;
391 3a227e9a 2021-03-18 op 	}
392 3a227e9a 2021-03-18 op 	fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
393 3a227e9a 2021-03-18 op 	fclose(f);
394 3a227e9a 2021-03-18 op 
395 3a227e9a 2021-03-18 op 	res = 0;
396 3a227e9a 2021-03-18 op end:
397 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
398 288fd238 2021-04-25 op 	    &res, sizeof(res));
399 288fd238 2021-04-25 op }
400 288fd238 2021-04-25 op 
401 288fd238 2021-04-25 op static void
402 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
403 288fd238 2021-04-25 op {
404 288fd238 2021-04-25 op 	FILE	*tmp, *f;
405 288fd238 2021-04-25 op 	struct	 tofu_entry entry;
406 288fd238 2021-04-25 op 	char	 sfn[PATH_MAX], *line = NULL, *t;
407 288fd238 2021-04-25 op 	size_t	 l, linesize = 0;
408 288fd238 2021-04-25 op 	ssize_t	 linelen;
409 288fd238 2021-04-25 op 	int	 fd, e, res = 0;
410 288fd238 2021-04-25 op 
411 288fd238 2021-04-25 op 	if (datalen != sizeof(entry))
412 288fd238 2021-04-25 op 		die();
413 288fd238 2021-04-25 op 	memcpy(&entry, imsg->data, datalen);
414 288fd238 2021-04-25 op 
415 288fd238 2021-04-25 op 	strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
416 288fd238 2021-04-25 op 	if ((fd = mkstemp(sfn)) == -1 ||
417 288fd238 2021-04-25 op 	    (tmp = fdopen(fd, "w")) == NULL) {
418 288fd238 2021-04-25 op 		if (fd != -1) {
419 288fd238 2021-04-25 op 			unlink(sfn);
420 288fd238 2021-04-25 op 			close(fd);
421 288fd238 2021-04-25 op 		}
422 288fd238 2021-04-25 op 		res = 0;
423 288fd238 2021-04-25 op 		goto end;
424 288fd238 2021-04-25 op 	}
425 288fd238 2021-04-25 op 
426 288fd238 2021-04-25 op 	if ((f = fopen(known_hosts_file, "r")) == NULL) {
427 288fd238 2021-04-25 op 		unlink(sfn);
428 288fd238 2021-04-25 op 		fclose(tmp);
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 	l = strlen(entry.domain);
434 288fd238 2021-04-25 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
435 288fd238 2021-04-25 op 		if ((t = strstr(line, entry.domain)) != NULL &&
436 288fd238 2021-04-25 op 		    (line[l] == ' ' || line[l] == '\t'))
437 288fd238 2021-04-25 op 			continue;
438 288fd238 2021-04-25 op 		/* line has a trailing \n */
439 288fd238 2021-04-25 op 		fprintf(tmp, "%s", line);
440 288fd238 2021-04-25 op 	}
441 288fd238 2021-04-25 op 	fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
442 288fd238 2021-04-25 op 
443 288fd238 2021-04-25 op 	free(line);
444 288fd238 2021-04-25 op 	e = ferror(tmp);
445 288fd238 2021-04-25 op 
446 288fd238 2021-04-25 op 	fclose(tmp);
447 288fd238 2021-04-25 op 	fclose(f);
448 288fd238 2021-04-25 op 
449 288fd238 2021-04-25 op 	if (e) {
450 288fd238 2021-04-25 op 		unlink(sfn);
451 288fd238 2021-04-25 op 		res = 0;
452 288fd238 2021-04-25 op 		goto end;
453 288fd238 2021-04-25 op 	}
454 288fd238 2021-04-25 op 
455 288fd238 2021-04-25 op 	res = rename(sfn, known_hosts_file) != -1;
456 288fd238 2021-04-25 op 
457 288fd238 2021-04-25 op end:
458 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
459 3a227e9a 2021-03-18 op 	    &res, sizeof(res));
460 de2a69bb 2021-05-17 op }
461 de2a69bb 2021-05-17 op 
462 de2a69bb 2021-05-17 op static void
463 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
464 de2a69bb 2021-05-17 op {
465 de2a69bb 2021-05-17 op 	char	*path, *e;
466 de2a69bb 2021-05-17 op 	int	 fd;
467 de2a69bb 2021-05-17 op 
468 de2a69bb 2021-05-17 op 	path = imsg->data;
469 de2a69bb 2021-05-17 op 	if (path[datalen-1] != '\0')
470 de2a69bb 2021-05-17 op 		die();
471 de2a69bb 2021-05-17 op 
472 de2a69bb 2021-05-17 op 	if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
473 de2a69bb 2021-05-17 op 		e = strerror(errno);
474 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
475 de2a69bb 2021-05-17 op 		    e, strlen(e)+1);
476 de2a69bb 2021-05-17 op 	} else
477 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
478 de2a69bb 2021-05-17 op 		    NULL, 0);
479 3a227e9a 2021-03-18 op }
480 3a227e9a 2021-03-18 op 
481 3a227e9a 2021-03-18 op static void
482 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
483 c7107cec 2021-04-01 op {
484 c7107cec 2021-04-01 op 	if (datalen != 0)
485 c7107cec 2021-04-01 op 		die();
486 c7107cec 2021-04-01 op 
487 c7107cec 2021-04-01 op 	if ((session = fopen(session_file, "w")) == NULL)
488 c7107cec 2021-04-01 op 		die();
489 c7107cec 2021-04-01 op }
490 c7107cec 2021-04-01 op 
491 c7107cec 2021-04-01 op static void
492 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
493 c7107cec 2021-04-01 op {
494 f8c6e753 2021-12-30 op 	struct session_tab	tab;
495 58df4f47 2021-07-17 op 
496 c7107cec 2021-04-01 op 	if (session == NULL)
497 c7107cec 2021-04-01 op 		die();
498 c7107cec 2021-04-01 op 
499 f8c6e753 2021-12-30 op 	if (datalen != sizeof(tab))
500 c7107cec 2021-04-01 op 		die();
501 87e3e801 2021-07-17 op 
502 f8c6e753 2021-12-30 op 	memcpy(&tab, imsg->data, sizeof(tab));
503 f8c6e753 2021-12-30 op 	if (tab.uri[sizeof(tab.uri)-1] != '\0' ||
504 f8c6e753 2021-12-30 op 	    tab.title[sizeof(tab.title)-1] != '\0')
505 f8c6e753 2021-12-30 op 		die();
506 f8c6e753 2021-12-30 op 
507 f8c6e753 2021-12-30 op 	fprintf(session, "%s", tab.uri);
508 f8c6e753 2021-12-30 op 
509 6c74799d 2022-01-05 op 	if (tab.flags == 0)
510 2f524b17 2021-07-17 op 		fprintf(session, " - ");
511 6c74799d 2022-01-05 op 	else {
512 6c74799d 2022-01-05 op 		fprintf(session, " ");
513 6c74799d 2022-01-05 op 		if (tab.flags & TAB_CURRENT)
514 6c74799d 2022-01-05 op 			fprintf(session, "current,");
515 6c74799d 2022-01-05 op 		if (tab.flags & TAB_KILLED)
516 6c74799d 2022-01-05 op 			fprintf(session, "killed,");
517 6c74799d 2022-01-05 op 		fprintf(session, " ");
518 6c74799d 2022-01-05 op 	}
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 6c8ddace 2022-01-03 op init_paths(void)
627 eb2ed626 2021-10-07 op {
628 7e60a21a 2022-01-03 op 	char		 xdg_config_base[PATH_MAX];
629 7e60a21a 2022-01-03 op 	char		 xdg_data_base[PATH_MAX];
630 7e60a21a 2022-01-03 op 	char		 xdg_cache_base[PATH_MAX];
631 7e60a21a 2022-01-03 op 	char		 old_path[PATH_MAX];
632 7e60a21a 2022-01-03 op 	char		*home;
633 7e60a21a 2022-01-03 op 	struct stat	 info;
634 eb2ed626 2021-10-07 op 
635 eb2ed626 2021-10-07 op 	/* old path */
636 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
637 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
638 eb2ed626 2021-10-07 op 	join_path(old_path, home, "/.telescope", sizeof(old_path));
639 eb2ed626 2021-10-07 op 
640 eb2ed626 2021-10-07 op 	/* if ~/.telescope exists, use that instead of xdg dirs */
641 eb2ed626 2021-10-07 op 	if (stat(old_path, &info) == 0 && S_ISDIR(info.st_mode)) {
642 eb2ed626 2021-10-07 op 		join_path(config_path_base, home, "/.telescope",
643 eb2ed626 2021-10-07 op 		    sizeof(config_path_base));
644 eb2ed626 2021-10-07 op 		join_path(data_path_base, home, "/.telescope",
645 eb2ed626 2021-10-07 op 		    sizeof(data_path_base));
646 eb2ed626 2021-10-07 op 		join_path(cache_path_base, home, "/.telescope",
647 eb2ed626 2021-10-07 op 		    sizeof(cache_path_base));
648 eb2ed626 2021-10-07 op 		return;
649 eb2ed626 2021-10-07 op 	}
650 eb2ed626 2021-10-07 op 
651 eb2ed626 2021-10-07 op 	/* xdg paths */
652 eb2ed626 2021-10-07 op 	getenv_default(xdg_config_base, "XDG_CONFIG_HOME", "/.config",
653 eb2ed626 2021-10-07 op 	    sizeof(xdg_config_base));
654 eb2ed626 2021-10-07 op 	getenv_default(xdg_data_base, "XDG_DATA_HOME", "/.local/share",
655 eb2ed626 2021-10-07 op 	    sizeof(xdg_data_base));
656 eb2ed626 2021-10-07 op 	getenv_default(xdg_cache_base, "XDG_CACHE_HOME", "/.cache",
657 eb2ed626 2021-10-07 op 	    sizeof(xdg_cache_base));
658 eb2ed626 2021-10-07 op 
659 eb2ed626 2021-10-07 op 	join_path(config_path_base, xdg_config_base, "/telescope",
660 eb2ed626 2021-10-07 op 	    sizeof(config_path_base));
661 eb2ed626 2021-10-07 op 	join_path(data_path_base, xdg_data_base, "/telescope",
662 eb2ed626 2021-10-07 op 	    sizeof(data_path_base));
663 eb2ed626 2021-10-07 op 	join_path(cache_path_base, xdg_cache_base, "/telescope",
664 eb2ed626 2021-10-07 op 	    sizeof(cache_path_base));
665 eb2ed626 2021-10-07 op 
666 eb2ed626 2021-10-07 op 	mkdirs(xdg_config_base, S_IRWXU);
667 eb2ed626 2021-10-07 op 	mkdirs(xdg_data_base, S_IRWXU);
668 eb2ed626 2021-10-07 op 	mkdirs(xdg_cache_base, S_IRWXU);
669 eb2ed626 2021-10-07 op 
670 eb2ed626 2021-10-07 op 	mkdirs(config_path_base, S_IRWXU);
671 eb2ed626 2021-10-07 op 	mkdirs(data_path_base, S_IRWXU);
672 eb2ed626 2021-10-07 op 	mkdirs(cache_path_base, S_IRWXU);
673 eb2ed626 2021-10-07 op }
674 eb2ed626 2021-10-07 op 
675 eb2ed626 2021-10-07 op int
676 eb2ed626 2021-10-07 op fs_init(void)
677 eb2ed626 2021-10-07 op {
678 6c8ddace 2022-01-03 op 	init_paths();
679 eb2ed626 2021-10-07 op 
680 eb2ed626 2021-10-07 op 	join_path(config_path, config_path_base, "/config",
681 eb2ed626 2021-10-07 op 	    sizeof(config_path));
682 eb2ed626 2021-10-07 op 	join_path(lockfile_path, cache_path_base, "/lock",
683 eb2ed626 2021-10-07 op 	    sizeof(lockfile_path));
684 eb2ed626 2021-10-07 op 	join_path(bookmark_file, data_path_base, "/bookmarks.gmi",
685 eb2ed626 2021-10-07 op 	    sizeof(bookmark_file));
686 eb2ed626 2021-10-07 op 	join_path(known_hosts_file, data_path_base, "/known_hosts",
687 eb2ed626 2021-10-07 op 	    sizeof(known_hosts_file));
688 eb2ed626 2021-10-07 op 	join_path(known_hosts_tmp, cache_path_base,
689 eb2ed626 2021-10-07 op 	    "/known_hosts.tmp.XXXXXXXXXX", sizeof(known_hosts_tmp));
690 eb2ed626 2021-10-07 op 	join_path(session_file, cache_path_base, "/session",
691 eb2ed626 2021-10-07 op 	    sizeof(session_file));
692 eb2ed626 2021-10-07 op 	join_path(crashed_file, cache_path_base, "/crashed",
693 eb2ed626 2021-10-07 op 	    sizeof(crashed_file));
694 eb2ed626 2021-10-07 op 
695 3a227e9a 2021-03-18 op 	return 1;
696 3a227e9a 2021-03-18 op }
697 bb28f1c2 2021-12-30 op 
698 bb28f1c2 2021-12-30 op /*
699 bb28f1c2 2021-12-30 op  * Parse a line of the session file.  The format is:
700 bb28f1c2 2021-12-30 op  *
701 bb28f1c2 2021-12-30 op  *	URL [flags,...] [title]\n
702 bb28f1c2 2021-12-30 op  */
703 bb28f1c2 2021-12-30 op static void
704 bb28f1c2 2021-12-30 op parse_session_line(char *line, const char **title, uint32_t *flags)
705 bb28f1c2 2021-12-30 op {
706 bb28f1c2 2021-12-30 op 	char *s, *t, *ap;
707 bb28f1c2 2021-12-30 op 
708 bb28f1c2 2021-12-30 op 	*title = "";
709 bb28f1c2 2021-12-30 op 	*flags = 0;
710 bb28f1c2 2021-12-30 op 	if ((s = strchr(line, ' ')) == NULL)
711 bb28f1c2 2021-12-30 op 		return;
712 3a227e9a 2021-03-18 op 
713 bb28f1c2 2021-12-30 op 	*s++ = '\0';
714 bb28f1c2 2021-12-30 op 
715 bb28f1c2 2021-12-30 op 	if ((t = strchr(s, ' ')) != NULL) {
716 bb28f1c2 2021-12-30 op 		*t++ = '\0';
717 bb28f1c2 2021-12-30 op 		*title = t;
718 bb28f1c2 2021-12-30 op 	}
719 bb28f1c2 2021-12-30 op 
720 bb28f1c2 2021-12-30 op 	while ((ap = strsep(&s, ",")) != NULL) {
721 bb28f1c2 2021-12-30 op 		if (!strcmp(ap, "current"))
722 bb28f1c2 2021-12-30 op 			*flags |= TAB_CURRENT;
723 6c74799d 2022-01-05 op 		else if (!strcmp(ap, "killed"))
724 6c74799d 2022-01-05 op 			*flags |= TAB_KILLED;
725 bb28f1c2 2021-12-30 op 	}
726 bb28f1c2 2021-12-30 op }
727 bb28f1c2 2021-12-30 op 
728 bb28f1c2 2021-12-30 op static inline void
729 bb28f1c2 2021-12-30 op sendtab(uint32_t flags, const char *uri, const char *title)
730 bb28f1c2 2021-12-30 op {
731 bb28f1c2 2021-12-30 op 	struct session_tab tab;
732 bb28f1c2 2021-12-30 op 
733 bb28f1c2 2021-12-30 op 	memset(&tab, 0, sizeof(tab));
734 bb28f1c2 2021-12-30 op 	tab.flags = flags;
735 bb28f1c2 2021-12-30 op 
736 bb28f1c2 2021-12-30 op 	if (strlcpy(tab.uri, uri, sizeof(tab.uri)) >= sizeof(tab.uri))
737 bb28f1c2 2021-12-30 op 		return;
738 bb28f1c2 2021-12-30 op 
739 bb28f1c2 2021-12-30 op 	/* don't worry about cached title truncation */
740 bb28f1c2 2021-12-30 op 	if (title != NULL)
741 bb28f1c2 2021-12-30 op 		strlcpy(tab.title, title, sizeof(tab.title));
742 bb28f1c2 2021-12-30 op 
743 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_TAB, 0, -1, &tab, sizeof(tab));
744 1040cc7f 2021-01-02 op }
745 1040cc7f 2021-01-02 op 
746 1040cc7f 2021-01-02 op static inline void
747 1040cc7f 2021-01-02 op sendhist(const char *uri, int future)
748 1040cc7f 2021-01-02 op {
749 1040cc7f 2021-01-02 op 	struct session_tab_hist sth;
750 1040cc7f 2021-01-02 op 
751 1040cc7f 2021-01-02 op 	memset(&sth, 0, sizeof(sth));
752 1040cc7f 2021-01-02 op 	sth.future = future;
753 1040cc7f 2021-01-02 op 
754 1040cc7f 2021-01-02 op 	if (strlcpy(sth.uri, uri, sizeof(sth.uri)) >= sizeof(sth.uri))
755 1040cc7f 2021-01-02 op 		return;
756 1040cc7f 2021-01-02 op 
757 1040cc7f 2021-01-02 op 	fs_send_ui(IMSG_SESSION_TAB_HIST, 0, -1, &sth, sizeof(sth));
758 bb28f1c2 2021-12-30 op }
759 bb28f1c2 2021-12-30 op 
760 bb28f1c2 2021-12-30 op static void
761 50f03682 2022-01-03 op load_last_session(void)
762 bb28f1c2 2021-12-30 op {
763 bb28f1c2 2021-12-30 op 	FILE		*session;
764 bb28f1c2 2021-12-30 op 	uint32_t	 flags;
765 bb28f1c2 2021-12-30 op 	size_t		 linesize = 0;
766 bb28f1c2 2021-12-30 op 	ssize_t		 linelen;
767 bb28f1c2 2021-12-30 op 	int		 first_time = 0;
768 1040cc7f 2021-01-02 op 	int		 future;
769 bb28f1c2 2021-12-30 op 	const char	*title;
770 1040cc7f 2021-01-02 op 	char		*nl, *s, *line = NULL;
771 bb28f1c2 2021-12-30 op 
772 bb28f1c2 2021-12-30 op 	if ((session = fopen(session_file, "r")) == NULL) {
773 bb28f1c2 2021-12-30 op 		/* first time? */
774 bb28f1c2 2021-12-30 op 		first_time = 1;
775 bb28f1c2 2021-12-30 op 		goto end;
776 bb28f1c2 2021-12-30 op 	}
777 bb28f1c2 2021-12-30 op 
778 bb28f1c2 2021-12-30 op 	while ((linelen = getline(&line, &linesize, session)) != -1) {
779 bb28f1c2 2021-12-30 op 		if ((nl = strchr(line, '\n')) != NULL)
780 bb28f1c2 2021-12-30 op 			*nl = '\0';
781 1040cc7f 2021-01-02 op 
782 1040cc7f 2021-01-02 op 		if (*line == '<' || *line == '>') {
783 1040cc7f 2021-01-02 op 			future = *line == '>';
784 1040cc7f 2021-01-02 op 			s = line+1;
785 1040cc7f 2021-01-02 op 			if (*s != ' ')
786 1040cc7f 2021-01-02 op 				continue;
787 1040cc7f 2021-01-02 op 			sendhist(++s, future);
788 1040cc7f 2021-01-02 op 		} else {
789 1040cc7f 2021-01-02 op 			parse_session_line(line, &title, &flags);
790 1040cc7f 2021-01-02 op 			sendtab(flags, line, title);
791 1040cc7f 2021-01-02 op 		}
792 bb28f1c2 2021-12-30 op 	}
793 bb28f1c2 2021-12-30 op 
794 bb28f1c2 2021-12-30 op 	fclose(session);
795 bb28f1c2 2021-12-30 op 	free(line);
796 bb28f1c2 2021-12-30 op 
797 bb28f1c2 2021-12-30 op 	if (last_time_crashed())
798 bb28f1c2 2021-12-30 op 		sendtab(TAB_CURRENT, "about:crash", NULL);
799 bb28f1c2 2021-12-30 op 
800 bb28f1c2 2021-12-30 op end:
801 bb28f1c2 2021-12-30 op 	fs_send_ui(IMSG_SESSION_END, 0, -1, &first_time, sizeof(first_time));
802 bb28f1c2 2021-12-30 op }
803 bb28f1c2 2021-12-30 op 
804 3a227e9a 2021-03-18 op int
805 6cc5fcfe 2021-07-08 op fs_main(void)
806 3a227e9a 2021-03-18 op {
807 6cc5fcfe 2021-07-08 op 	setproctitle("fs");
808 3a227e9a 2021-03-18 op 
809 6cc5fcfe 2021-07-08 op 	fs_init();
810 6cc5fcfe 2021-07-08 op 
811 35e1f40a 2021-03-14 op 	event_init();
812 35e1f40a 2021-03-14 op 
813 bc10f6a5 2021-07-12 op 	/* Setup pipe and event handler to the main process */
814 bc10f6a5 2021-07-12 op 	if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
815 6cc5fcfe 2021-07-08 op 		die();
816 bc10f6a5 2021-07-12 op 	imsg_init(&iev_ui->ibuf, 3);
817 bc10f6a5 2021-07-12 op 	iev_ui->handler = handle_dispatch_imsg;
818 bc10f6a5 2021-07-12 op 	iev_ui->events = EV_READ;
819 bc10f6a5 2021-07-12 op 	event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
820 bc10f6a5 2021-07-12 op 	    iev_ui->handler, iev_ui);
821 bc10f6a5 2021-07-12 op 	event_add(&iev_ui->ev, NULL);
822 35e1f40a 2021-03-14 op 
823 35e1f40a 2021-03-14 op 	sandbox_fs_process();
824 35e1f40a 2021-03-14 op 
825 35e1f40a 2021-03-14 op 	event_dispatch();
826 35e1f40a 2021-03-14 op 	return 0;
827 35e1f40a 2021-03-14 op }
828 3a227e9a 2021-03-18 op 
829 be97d6e6 2021-08-15 op /*
830 be97d6e6 2021-08-15 op  * Check if the last time telescope crashed.  The check is done by
831 be97d6e6 2021-08-15 op  * looking at `crashed_file': if it exists then last time we crashed.
832 be97d6e6 2021-08-15 op  * Then, while here, touch the file too.  During IMSG_QUIT we'll
833 be97d6e6 2021-08-15 op  * remove it.
834 be97d6e6 2021-08-15 op  */
835 83ed72f1 2022-01-03 op static int
836 b6171794 2021-07-20 op last_time_crashed(void)
837 b6171794 2021-07-20 op {
838 be97d6e6 2021-08-15 op 	int fd, crashed = 1;
839 b6171794 2021-07-20 op 
840 2b409042 2021-09-15 op 	if (safe_mode)
841 2b409042 2021-09-15 op 		return 0;
842 2b409042 2021-09-15 op 
843 be97d6e6 2021-08-15 op 	if (unlink(crashed_file) == -1 && errno == ENOENT)
844 be97d6e6 2021-08-15 op 		crashed = 0;
845 be97d6e6 2021-08-15 op 
846 be97d6e6 2021-08-15 op 	if ((fd = open(crashed_file, O_CREAT|O_WRONLY, 0600)) == -1)
847 be97d6e6 2021-08-15 op 		return crashed;
848 b6171794 2021-07-20 op 	close(fd);
849 be97d6e6 2021-08-15 op 
850 be97d6e6 2021-08-15 op 	return crashed;
851 b6171794 2021-07-20 op }
852 b6171794 2021-07-20 op 
853 b6171794 2021-07-20 op int
854 d0fd368a 2021-07-15 op lock_session(void)
855 d0fd368a 2021-07-15 op {
856 d0fd368a 2021-07-15 op 	struct flock	lock;
857 d0fd368a 2021-07-15 op 	int		fd;
858 d0fd368a 2021-07-15 op 
859 d0fd368a 2021-07-15 op 	if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
860 d0fd368a 2021-07-15 op 		return -1;
861 d0fd368a 2021-07-15 op 
862 d0fd368a 2021-07-15 op 	lock.l_start = 0;
863 d0fd368a 2021-07-15 op 	lock.l_len = 0;
864 d0fd368a 2021-07-15 op 	lock.l_type = F_WRLCK;
865 d0fd368a 2021-07-15 op 	lock.l_whence = SEEK_SET;
866 c6d03cf5 2021-04-25 op 
867 d0fd368a 2021-07-15 op 	if (fcntl(fd, F_SETLK, &lock) == -1) {
868 d0fd368a 2021-07-15 op 		close(fd);
869 d0fd368a 2021-07-15 op 		return -1;
870 d0fd368a 2021-07-15 op 	}
871 d0fd368a 2021-07-15 op 
872 d0fd368a 2021-07-15 op 	return fd;
873 d0fd368a 2021-07-15 op }
874 d0fd368a 2021-07-15 op 
875 6400962b 2022-01-03 op static inline int
876 c6d03cf5 2021-04-25 op parse_khost_line(char *line, char *tmp[3])
877 c6d03cf5 2021-04-25 op {
878 c6d03cf5 2021-04-25 op 	char **ap;
879 c6d03cf5 2021-04-25 op 
880 c6d03cf5 2021-04-25 op 	for (ap = tmp; ap < &tmp[3] &&
881 c6d03cf5 2021-04-25 op 	    (*ap = strsep(&line, " \t\n")) != NULL;) {
882 c6d03cf5 2021-04-25 op 		if (**ap != '\0')
883 c6d03cf5 2021-04-25 op 			ap++;
884 c6d03cf5 2021-04-25 op 	}
885 3a227e9a 2021-03-18 op 
886 c6d03cf5 2021-04-25 op 	return ap == &tmp[3] && *line == '\0';
887 c6d03cf5 2021-04-25 op }
888 c6d03cf5 2021-04-25 op 
889 eb722b50 2022-01-03 op static void
890 eb722b50 2022-01-03 op load_certs(void)
891 3a227e9a 2021-03-18 op {
892 c6d03cf5 2021-04-25 op 	char		*tmp[3], *line = NULL;
893 6cd6a9e1 2021-03-20 op 	const char	*errstr;
894 ec1fa0b0 2021-04-25 op 	size_t		 lineno = 0, linesize = 0;
895 3a227e9a 2021-03-18 op 	ssize_t		 linelen;
896 3a227e9a 2021-03-18 op 	FILE		*f;
897 eb722b50 2022-01-03 op 	struct tofu_entry e;
898 3a227e9a 2021-03-18 op 
899 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "r")) == NULL)
900 eb722b50 2022-01-03 op 		return;
901 3a227e9a 2021-03-18 op 
902 3a227e9a 2021-03-18 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
903 ec1fa0b0 2021-04-25 op 		lineno++;
904 3a227e9a 2021-03-18 op 
905 eb722b50 2022-01-03 op 		memset(&e, 0, sizeof(e));
906 eb722b50 2022-01-03 op 		if (parse_khost_line(line, tmp)) {
907 eb722b50 2022-01-03 op 			strlcpy(e.domain, tmp[0], sizeof(e.domain));
908 eb722b50 2022-01-03 op 			strlcpy(e.hash, tmp[1], sizeof(e.hash));
909 3a227e9a 2021-03-18 op 
910 eb722b50 2022-01-03 op 			e.verified = strtonum(tmp[2], 0, 1, &errstr);
911 c6d03cf5 2021-04-25 op 			if (errstr != NULL)
912 c6d03cf5 2021-04-25 op 				errx(1, "%s:%zu verification for %s is %s: %s",
913 c6d03cf5 2021-04-25 op 				    known_hosts_file, lineno,
914 eb722b50 2022-01-03 op 				    e.domain, errstr, tmp[2]);
915 eb722b50 2022-01-03 op 
916 eb722b50 2022-01-03 op 			fs_send_ui(IMSG_TOFU, 0, -1, &e, sizeof(e));
917 c6d03cf5 2021-04-25 op 		} else {
918 ec1fa0b0 2021-04-25 op 			warnx("%s:%zu invalid entry",
919 ec1fa0b0 2021-04-25 op 			    known_hosts_file, lineno);
920 c6d03cf5 2021-04-25 op 		}
921 3a227e9a 2021-03-18 op 	}
922 3a227e9a 2021-03-18 op 
923 3a227e9a 2021-03-18 op 	free(line);
924 eb722b50 2022-01-03 op 	fclose(f);
925 eb722b50 2022-01-03 op 	return;
926 3a227e9a 2021-03-18 op }
927 c7107cec 2021-04-01 op