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 35e1f40a 2021-03-14 op static void		 handle_quit(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 2f524b17 2021-07-17 op static void		 handle_session_tab_title(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 35e1f40a 2021-03-14 op 
 62 bc10f6a5 2021-07-12 op static struct imsgev		*iev_ui;
 63 c7107cec 2021-04-01 op static FILE			*session;
 64 c7107cec 2021-04-01 op 
 65 f88fbabc 2021-11-27 op /*
 66 f88fbabc 2021-11-27 op  * Note: these are empty if ~/.telescope exists, use *_path_base
 67 f88fbabc 2021-11-27 op  * below.
 68 f88fbabc 2021-11-27 op  */
 69 eb2ed626 2021-10-07 op static char	xdg_config_base[PATH_MAX];
 70 eb2ed626 2021-10-07 op static char	xdg_data_base[PATH_MAX];
 71 eb2ed626 2021-10-07 op static char	xdg_cache_base[PATH_MAX];
 72 eb2ed626 2021-10-07 op 
 73 f88fbabc 2021-11-27 op /*
 74 f88fbabc 2021-11-27 op  * Where to store user data.  These are all equal to ~/.telescope if
 75 f88fbabc 2021-11-27 op  * it exists.
 76 f88fbabc 2021-11-27 op  */
 77 fb3d08c1 2021-10-07 op char		config_path_base[PATH_MAX];
 78 fb3d08c1 2021-10-07 op char		data_path_base[PATH_MAX];
 79 fb3d08c1 2021-10-07 op char		cache_path_base[PATH_MAX];
 80 eb2ed626 2021-10-07 op 
 81 eb2ed626 2021-10-07 op char		config_path[PATH_MAX];
 82 fb3d08c1 2021-10-07 op char		lockfile_path[PATH_MAX];
 83 fb3d08c1 2021-10-07 op char		bookmark_file[PATH_MAX];
 84 fb3d08c1 2021-10-07 op char		known_hosts_file[PATH_MAX], known_hosts_tmp[PATH_MAX];
 85 fb3d08c1 2021-10-07 op char		crashed_file[PATH_MAX];
 86 fb3d08c1 2021-10-07 op char		session_file[PATH_MAX];
 87 740f578b 2021-03-15 op 
 88 35e1f40a 2021-03-14 op static imsg_handlerfn *handlers[] = {
 89 35e1f40a 2021-03-14 op 	[IMSG_GET] = handle_get,
 90 fb4dc49f 2021-08-13 op 	[IMSG_GET_FILE] = handle_get_file,
 91 35e1f40a 2021-03-14 op 	[IMSG_QUIT] = handle_quit,
 92 740f578b 2021-03-15 op 	[IMSG_BOOKMARK_PAGE] = handle_bookmark_page,
 93 3a227e9a 2021-03-18 op 	[IMSG_SAVE_CERT] = handle_save_cert,
 94 288fd238 2021-04-25 op 	[IMSG_UPDATE_CERT] = handle_update_cert,
 95 de2a69bb 2021-05-17 op 	[IMSG_FILE_OPEN] = handle_file_open,
 96 c7107cec 2021-04-01 op 	[IMSG_SESSION_START] = handle_session_start,
 97 c7107cec 2021-04-01 op 	[IMSG_SESSION_TAB] = handle_session_tab,
 98 2f524b17 2021-07-17 op 	[IMSG_SESSION_TAB_TITLE] = handle_session_tab_title,
 99 c7107cec 2021-04-01 op 	[IMSG_SESSION_END] = handle_session_end,
100 35e1f40a 2021-03-14 op };
101 35e1f40a 2021-03-14 op 
102 35e1f40a 2021-03-14 op static void __attribute__((__noreturn__))
103 35e1f40a 2021-03-14 op die(void)
104 35e1f40a 2021-03-14 op {
105 35e1f40a 2021-03-14 op 	abort(); 		/* TODO */
106 35e1f40a 2021-03-14 op }
107 35e1f40a 2021-03-14 op 
108 35e1f40a 2021-03-14 op static void
109 fb4dc49f 2021-08-13 op send_file(uint32_t peerid, FILE *f)
110 fb4dc49f 2021-08-13 op {
111 fb4dc49f 2021-08-13 op 	ssize_t	 r;
112 fb4dc49f 2021-08-13 op 	char	 buf[BUFSIZ];
113 fb4dc49f 2021-08-13 op 
114 fb4dc49f 2021-08-13 op 	for (;;) {
115 fb4dc49f 2021-08-13 op 		r = fread(buf, 1, sizeof(buf), f);
116 fb4dc49f 2021-08-13 op 		if (r != 0)
117 fb4dc49f 2021-08-13 op 			fs_send_ui(IMSG_BUF, peerid, -1, buf, r);
118 fb4dc49f 2021-08-13 op 		if (r != sizeof(buf))
119 fb4dc49f 2021-08-13 op 			break;
120 fb4dc49f 2021-08-13 op 	}
121 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
122 fb4dc49f 2021-08-13 op 	fclose(f);
123 fb4dc49f 2021-08-13 op }
124 fb4dc49f 2021-08-13 op 
125 fb4dc49f 2021-08-13 op static void
126 35e1f40a 2021-03-14 op handle_get(struct imsg *imsg, size_t datalen)
127 35e1f40a 2021-03-14 op {
128 56e7efb4 2021-07-21 op 	const char	*bpath = "bookmarks.gmi";
129 fb4dc49f 2021-08-13 op 	char		 path[PATH_MAX];
130 56e7efb4 2021-07-21 op 	FILE		*f;
131 a2728733 2021-07-18 op 	const char	*data, *p;
132 a2728733 2021-07-18 op 	size_t		 i;
133 a2728733 2021-07-18 op 	struct page {
134 a2728733 2021-07-18 op 		const char	*name;
135 56e7efb4 2021-07-21 op 		const char	*path;
136 a2728733 2021-07-18 op 		const uint8_t	*data;
137 a2728733 2021-07-18 op 		size_t		 len;
138 a2728733 2021-07-18 op 	} pages[] = {
139 56e7efb4 2021-07-21 op 		{"about",	NULL,	about_about,	about_about_len},
140 56e7efb4 2021-07-21 op 		{"blank",	NULL,	about_blank,	about_blank_len},
141 56e7efb4 2021-07-21 op 		{"bookmarks",	bpath,	bookmarks,	bookmarks_len},
142 56e7efb4 2021-07-21 op 		{"crash",	NULL,	about_crash,	about_crash_len},
143 56e7efb4 2021-07-21 op 		{"help",	NULL,	about_help,	about_help_len},
144 56e7efb4 2021-07-21 op 		{"license",	NULL,	about_license,	about_license_len},
145 56e7efb4 2021-07-21 op 		{"new",		NULL,	about_new,	about_new_len},
146 56e7efb4 2021-07-21 op 	}, *page = NULL;
147 35e1f40a 2021-03-14 op 
148 35e1f40a 2021-03-14 op 	data = imsg->data;
149 56e7efb4 2021-07-21 op 	if (data[datalen-1] != '\0') /* make sure it's NUL-terminated */
150 35e1f40a 2021-03-14 op 		die();
151 56e7efb4 2021-07-21 op 	if ((data = strchr(data, ':')) == NULL)
152 56e7efb4 2021-07-21 op 		goto notfound;
153 56e7efb4 2021-07-21 op 	data++;
154 35e1f40a 2021-03-14 op 
155 56e7efb4 2021-07-21 op 	for (i = 0; i < sizeof(pages)/sizeof(pages[0]); ++i)
156 56e7efb4 2021-07-21 op 		if (!strcmp(data, pages[i].name)) {
157 56e7efb4 2021-07-21 op 			page = &pages[i];
158 56e7efb4 2021-07-21 op 			break;
159 56e7efb4 2021-07-21 op 		}
160 56e7efb4 2021-07-21 op 
161 56e7efb4 2021-07-21 op 	if (page == NULL)
162 56e7efb4 2021-07-21 op 		goto notfound;
163 56e7efb4 2021-07-21 op 
164 de04b178 2021-11-26 op 	strlcpy(path, data_path_base, sizeof(path));
165 56e7efb4 2021-07-21 op 	strlcat(path, "/", sizeof(path));
166 56e7efb4 2021-07-21 op 	if (page->path != NULL)
167 56e7efb4 2021-07-21 op 		strlcat(path, page->path, sizeof(path));
168 56e7efb4 2021-07-21 op 	else {
169 56e7efb4 2021-07-21 op 		strlcat(path, "pages/about_", sizeof(path));
170 56e7efb4 2021-07-21 op 		strlcat(path, page->name, sizeof(path));
171 56e7efb4 2021-07-21 op 		strlcat(path, ".gmi", sizeof(path));
172 56e7efb4 2021-07-21 op 	}
173 56e7efb4 2021-07-21 op 
174 56e7efb4 2021-07-21 op 	if ((f = fopen(path, "r")) == NULL) {
175 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1,
176 56e7efb4 2021-07-21 op 		    page->data, page->len);
177 56e7efb4 2021-07-21 op 		fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1,
178 56e7efb4 2021-07-21 op 		    NULL, 0);
179 a2728733 2021-07-18 op 		return;
180 35e1f40a 2021-03-14 op 	}
181 a2728733 2021-07-18 op 
182 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
183 56e7efb4 2021-07-21 op 	return;
184 56e7efb4 2021-07-21 op 
185 56e7efb4 2021-07-21 op notfound:
186 a2728733 2021-07-18 op 	p = "# not found!\n";
187 a2728733 2021-07-18 op 	fs_send_ui(IMSG_BUF, imsg->hdr.peerid, -1, p, strlen(p));
188 a2728733 2021-07-18 op 	fs_send_ui(IMSG_EOF, imsg->hdr.peerid, -1, NULL, 0);
189 fb4dc49f 2021-08-13 op }
190 fb4dc49f 2021-08-13 op 
191 fb4dc49f 2021-08-13 op static inline void
192 fb4dc49f 2021-08-13 op send_hdr(uint32_t peerid, int code, const char *meta)
193 fb4dc49f 2021-08-13 op {
194 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_CODE, peerid, -1, &code, sizeof(code));
195 fb4dc49f 2021-08-13 op 	fs_send_ui(IMSG_GOT_META, peerid, -1, meta, strlen(meta)+1);
196 fb4dc49f 2021-08-13 op }
197 fb4dc49f 2021-08-13 op 
198 24a68158 2021-08-13 op static inline void
199 24a68158 2021-08-13 op send_errno(uint32_t peerid, int code, const char *str, int no)
200 24a68158 2021-08-13 op {
201 24a68158 2021-08-13 op 	char *s;
202 24a68158 2021-08-13 op 
203 24a68158 2021-08-13 op 	if (asprintf(&s, "%s: %s", str, strerror(no)) == -1)
204 24a68158 2021-08-13 op 		s = NULL;
205 24a68158 2021-08-13 op 
206 24a68158 2021-08-13 op 	send_hdr(peerid, code, s == NULL ? str : s);
207 24a68158 2021-08-13 op 	free(s);
208 24a68158 2021-08-13 op }
209 24a68158 2021-08-13 op 
210 65124267 2021-08-13 op static inline const char *
211 65124267 2021-08-13 op file_type(const char *path)
212 fb4dc49f 2021-08-13 op {
213 fb4dc49f 2021-08-13 op 	struct mapping {
214 fb4dc49f 2021-08-13 op 		const char	*ext;
215 fb4dc49f 2021-08-13 op 		const char	*mime;
216 fb4dc49f 2021-08-13 op 	} ms[] = {
217 fb4dc49f 2021-08-13 op 		{"diff",	"text/x-patch"},
218 fb4dc49f 2021-08-13 op 		{"gemini",	"text/gemini"},
219 fb4dc49f 2021-08-13 op 		{"gmi",		"text/gemini"},
220 fb4dc49f 2021-08-13 op 		{"markdown",	"text/plain"},
221 fb4dc49f 2021-08-13 op 		{"md",		"text/plain"},
222 fb4dc49f 2021-08-13 op 		{"patch",	"text/x-patch"},
223 fb4dc49f 2021-08-13 op 		{"txt",		"text/plain"},
224 fb4dc49f 2021-08-13 op 		{NULL, NULL},
225 65124267 2021-08-13 op 	}, *m;
226 65124267 2021-08-13 op 	char *dot;
227 65124267 2021-08-13 op 
228 65124267 2021-08-13 op 	if ((dot = strrchr(path, '.')) == NULL)
229 65124267 2021-08-13 op 		return NULL;
230 65124267 2021-08-13 op 
231 65124267 2021-08-13 op 	dot++;
232 65124267 2021-08-13 op 
233 65124267 2021-08-13 op 	for (m = ms; m->ext != NULL; ++m)
234 65124267 2021-08-13 op 		if (!strcmp(m->ext, dot))
235 65124267 2021-08-13 op 			return m->mime;
236 65124267 2021-08-13 op 
237 65124267 2021-08-13 op 	return NULL;
238 5cbe1763 2021-08-13 op }
239 5cbe1763 2021-08-13 op 
240 5cbe1763 2021-08-13 op static int
241 5cbe1763 2021-08-13 op select_non_dot(const struct dirent *d)
242 5cbe1763 2021-08-13 op {
243 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".");
244 5cbe1763 2021-08-13 op }
245 5cbe1763 2021-08-13 op 
246 5cbe1763 2021-08-13 op static int
247 5cbe1763 2021-08-13 op select_non_dotdot(const struct dirent *d)
248 5cbe1763 2021-08-13 op {
249 5cbe1763 2021-08-13 op 	return strcmp(d->d_name, ".") && strcmp(d->d_name, "..");
250 65124267 2021-08-13 op }
251 65124267 2021-08-13 op 
252 65124267 2021-08-13 op static inline void
253 65124267 2021-08-13 op send_dir(uint32_t peerid, const char *path)
254 65124267 2021-08-13 op {
255 65124267 2021-08-13 op 	struct dirent	**names;
256 65124267 2021-08-13 op 	struct evbuffer	 *ev;
257 5d43215b 2021-08-13 op 	char		 *s;
258 5cbe1763 2021-08-13 op 	int		(*selector)(const struct dirent *) = select_non_dot;
259 24a68158 2021-08-13 op 	int		  i, len, no;
260 65124267 2021-08-13 op 
261 5d43215b 2021-08-13 op 	if (!has_suffix(path, "/")) {
262 5d43215b 2021-08-13 op 		if (asprintf(&s, "%s/", path) == -1)
263 5d43215b 2021-08-13 op 			die();
264 5d43215b 2021-08-13 op 		send_hdr(peerid, 30, s);
265 5d43215b 2021-08-13 op 		free(s);
266 5d43215b 2021-08-13 op 		return;
267 5d43215b 2021-08-13 op 	}
268 5d43215b 2021-08-13 op 
269 5cbe1763 2021-08-13 op 	if (!strcmp(path, "/"))
270 5cbe1763 2021-08-13 op 		selector = select_non_dotdot;
271 5cbe1763 2021-08-13 op 
272 65124267 2021-08-13 op 	if ((ev = evbuffer_new()) == NULL ||
273 5cbe1763 2021-08-13 op 	    (len = scandir(path, &names, selector, alphasort)) == -1) {
274 24a68158 2021-08-13 op 		no = errno;
275 65124267 2021-08-13 op 		evbuffer_free(ev);
276 24a68158 2021-08-13 op 		send_errno(peerid, 40, "failure reading the directory", no);
277 65124267 2021-08-13 op 		return;
278 65124267 2021-08-13 op 	}
279 65124267 2021-08-13 op 
280 65124267 2021-08-13 op 	evbuffer_add_printf(ev, "# Index of %s\n\n", path);
281 65124267 2021-08-13 op 	for (i = 0; i < len; ++i) {
282 65124267 2021-08-13 op 		evbuffer_add_printf(ev, "=> %s", names[i]->d_name);
283 65124267 2021-08-13 op 		if (names[i]->d_type == DT_DIR)
284 65124267 2021-08-13 op 			evbuffer_add(ev, "/", 1);
285 65124267 2021-08-13 op 		evbuffer_add(ev, "\n", 1);
286 65124267 2021-08-13 op 	}
287 65124267 2021-08-13 op 
288 65124267 2021-08-13 op 	send_hdr(peerid, 20, "text/gemini");
289 65124267 2021-08-13 op 	fs_send_ui(IMSG_BUF, peerid, -1,
290 65124267 2021-08-13 op 	    EVBUFFER_DATA(ev), EVBUFFER_LENGTH(ev));
291 65124267 2021-08-13 op 	fs_send_ui(IMSG_EOF, peerid, -1, NULL, 0);
292 65124267 2021-08-13 op 
293 65124267 2021-08-13 op 	evbuffer_free(ev);
294 65124267 2021-08-13 op 	free(names);
295 65124267 2021-08-13 op }
296 65124267 2021-08-13 op 
297 65124267 2021-08-13 op static void
298 65124267 2021-08-13 op handle_get_file(struct imsg *imsg, size_t datalen)
299 65124267 2021-08-13 op {
300 65124267 2021-08-13 op 	struct stat	 sb;
301 fb4dc49f 2021-08-13 op 	FILE		*f;
302 65124267 2021-08-13 op 	char		*data;
303 fb4dc49f 2021-08-13 op 	const char	*meta = NULL;
304 fb4dc49f 2021-08-13 op 
305 fb4dc49f 2021-08-13 op 	data = imsg->data;
306 fb4dc49f 2021-08-13 op 	data[datalen-1] = '\0';
307 fb4dc49f 2021-08-13 op 
308 65124267 2021-08-13 op 	if ((f = fopen(data, "r")) == NULL) {
309 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 51, "can't open", errno);
310 fb4dc49f 2021-08-13 op 		return;
311 fb4dc49f 2021-08-13 op 	}
312 fb4dc49f 2021-08-13 op 
313 65124267 2021-08-13 op 	if (fstat(fileno(f), &sb) == -1) {
314 24a68158 2021-08-13 op 		send_errno(imsg->hdr.peerid, 40, "fstat", errno);
315 65124267 2021-08-13 op 		return;
316 fb4dc49f 2021-08-13 op 	}
317 fb4dc49f 2021-08-13 op 
318 65124267 2021-08-13 op 	if (S_ISDIR(sb.st_mode)) {
319 65124267 2021-08-13 op 		fclose(f);
320 65124267 2021-08-13 op 		send_dir(imsg->hdr.peerid, data);
321 fb4dc49f 2021-08-13 op 		return;
322 fb4dc49f 2021-08-13 op 	}
323 fb4dc49f 2021-08-13 op 
324 65124267 2021-08-13 op 	if ((meta = file_type(data)) == NULL) {
325 65124267 2021-08-13 op 		fclose(f);
326 65124267 2021-08-13 op 		send_hdr(imsg->hdr.peerid, 51,
327 65124267 2021-08-13 op 		    "don't know how to visualize this file");
328 fb4dc49f 2021-08-13 op 		return;
329 fb4dc49f 2021-08-13 op 	}
330 fb4dc49f 2021-08-13 op 
331 fb4dc49f 2021-08-13 op 	send_hdr(imsg->hdr.peerid, 20, meta);
332 fb4dc49f 2021-08-13 op 	send_file(imsg->hdr.peerid, f);
333 35e1f40a 2021-03-14 op }
334 35e1f40a 2021-03-14 op 
335 35e1f40a 2021-03-14 op static void
336 35e1f40a 2021-03-14 op handle_quit(struct imsg *imsg, size_t datalen)
337 35e1f40a 2021-03-14 op {
338 2b409042 2021-09-15 op 	if (!safe_mode)
339 2b409042 2021-09-15 op 		unlink(crashed_file);
340 be97d6e6 2021-08-15 op 
341 35e1f40a 2021-03-14 op 	event_loopbreak();
342 35e1f40a 2021-03-14 op }
343 35e1f40a 2021-03-14 op 
344 35e1f40a 2021-03-14 op static void
345 740f578b 2021-03-15 op handle_bookmark_page(struct imsg *imsg, size_t datalen)
346 740f578b 2021-03-15 op {
347 740f578b 2021-03-15 op 	char	*data;
348 740f578b 2021-03-15 op 	int	 res;
349 740f578b 2021-03-15 op 	FILE	*f;
350 740f578b 2021-03-15 op 
351 740f578b 2021-03-15 op 	data = imsg->data;
352 740f578b 2021-03-15 op 	if (data[datalen-1] != '\0')
353 740f578b 2021-03-15 op 		die();
354 740f578b 2021-03-15 op 
355 740f578b 2021-03-15 op 	if ((f = fopen(bookmark_file, "a")) == NULL) {
356 740f578b 2021-03-15 op 		res = errno;
357 740f578b 2021-03-15 op 		goto end;
358 740f578b 2021-03-15 op 	}
359 740f578b 2021-03-15 op 	fprintf(f, "=> %s\n", data);
360 740f578b 2021-03-15 op 	fclose(f);
361 740f578b 2021-03-15 op 
362 740f578b 2021-03-15 op 	res = 0;
363 740f578b 2021-03-15 op end:
364 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_BOOKMARK_OK, 0, -1, &res, sizeof(res));
365 740f578b 2021-03-15 op }
366 740f578b 2021-03-15 op 
367 740f578b 2021-03-15 op static void
368 3a227e9a 2021-03-18 op handle_save_cert(struct imsg *imsg, size_t datalen)
369 3a227e9a 2021-03-18 op {
370 3a227e9a 2021-03-18 op 	struct tofu_entry	 e;
371 3a227e9a 2021-03-18 op 	FILE			*f;
372 3a227e9a 2021-03-18 op 	int			 res;
373 3a227e9a 2021-03-18 op 
374 3a227e9a 2021-03-18 op 	/* TODO: traverse the file to avoid duplications? */
375 3a227e9a 2021-03-18 op 
376 3a227e9a 2021-03-18 op 	if (datalen != sizeof(e))
377 3a227e9a 2021-03-18 op 		die();
378 3a227e9a 2021-03-18 op 	memcpy(&e, imsg->data, datalen);
379 3a227e9a 2021-03-18 op 
380 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "a")) == NULL) {
381 3a227e9a 2021-03-18 op 		res = errno;
382 3a227e9a 2021-03-18 op 		goto end;
383 3a227e9a 2021-03-18 op 	}
384 3a227e9a 2021-03-18 op 	fprintf(f, "%s %s %d\n", e.domain, e.hash, e.verified);
385 3a227e9a 2021-03-18 op 	fclose(f);
386 3a227e9a 2021-03-18 op 
387 3a227e9a 2021-03-18 op 	res = 0;
388 3a227e9a 2021-03-18 op end:
389 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_SAVE_CERT_OK, imsg->hdr.peerid, -1,
390 288fd238 2021-04-25 op 	    &res, sizeof(res));
391 288fd238 2021-04-25 op }
392 288fd238 2021-04-25 op 
393 288fd238 2021-04-25 op static void
394 288fd238 2021-04-25 op handle_update_cert(struct imsg *imsg, size_t datalen)
395 288fd238 2021-04-25 op {
396 288fd238 2021-04-25 op 	FILE	*tmp, *f;
397 288fd238 2021-04-25 op 	struct	 tofu_entry entry;
398 288fd238 2021-04-25 op 	char	 sfn[PATH_MAX], *line = NULL, *t;
399 288fd238 2021-04-25 op 	size_t	 l, linesize = 0;
400 288fd238 2021-04-25 op 	ssize_t	 linelen;
401 288fd238 2021-04-25 op 	int	 fd, e, res = 0;
402 288fd238 2021-04-25 op 
403 288fd238 2021-04-25 op 	if (datalen != sizeof(entry))
404 288fd238 2021-04-25 op 		die();
405 288fd238 2021-04-25 op 	memcpy(&entry, imsg->data, datalen);
406 288fd238 2021-04-25 op 
407 288fd238 2021-04-25 op 	strlcpy(sfn, known_hosts_tmp, sizeof(sfn));
408 288fd238 2021-04-25 op 	if ((fd = mkstemp(sfn)) == -1 ||
409 288fd238 2021-04-25 op 	    (tmp = fdopen(fd, "w")) == NULL) {
410 288fd238 2021-04-25 op 		if (fd != -1) {
411 288fd238 2021-04-25 op 			unlink(sfn);
412 288fd238 2021-04-25 op 			close(fd);
413 288fd238 2021-04-25 op 		}
414 288fd238 2021-04-25 op 		res = 0;
415 288fd238 2021-04-25 op 		goto end;
416 288fd238 2021-04-25 op 	}
417 288fd238 2021-04-25 op 
418 288fd238 2021-04-25 op 	if ((f = fopen(known_hosts_file, "r")) == NULL) {
419 288fd238 2021-04-25 op 		unlink(sfn);
420 288fd238 2021-04-25 op 		fclose(tmp);
421 288fd238 2021-04-25 op                 res = 0;
422 288fd238 2021-04-25 op 		goto end;
423 288fd238 2021-04-25 op 	}
424 288fd238 2021-04-25 op 
425 288fd238 2021-04-25 op 	l = strlen(entry.domain);
426 288fd238 2021-04-25 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
427 288fd238 2021-04-25 op 		if ((t = strstr(line, entry.domain)) != NULL &&
428 288fd238 2021-04-25 op 		    (line[l] == ' ' || line[l] == '\t'))
429 288fd238 2021-04-25 op 			continue;
430 288fd238 2021-04-25 op 		/* line has a trailing \n */
431 288fd238 2021-04-25 op 		fprintf(tmp, "%s", line);
432 288fd238 2021-04-25 op 	}
433 288fd238 2021-04-25 op 	fprintf(tmp, "%s %s %d\n", entry.domain, entry.hash, entry.verified);
434 288fd238 2021-04-25 op 
435 288fd238 2021-04-25 op 	free(line);
436 288fd238 2021-04-25 op 	e = ferror(tmp);
437 288fd238 2021-04-25 op 
438 288fd238 2021-04-25 op 	fclose(tmp);
439 288fd238 2021-04-25 op 	fclose(f);
440 288fd238 2021-04-25 op 
441 288fd238 2021-04-25 op 	if (e) {
442 288fd238 2021-04-25 op 		unlink(sfn);
443 288fd238 2021-04-25 op 		res = 0;
444 288fd238 2021-04-25 op 		goto end;
445 288fd238 2021-04-25 op 	}
446 288fd238 2021-04-25 op 
447 288fd238 2021-04-25 op 	res = rename(sfn, known_hosts_file) != -1;
448 288fd238 2021-04-25 op 
449 288fd238 2021-04-25 op end:
450 bc10f6a5 2021-07-12 op 	fs_send_ui(IMSG_UPDATE_CERT_OK, imsg->hdr.peerid, -1,
451 3a227e9a 2021-03-18 op 	    &res, sizeof(res));
452 de2a69bb 2021-05-17 op }
453 de2a69bb 2021-05-17 op 
454 de2a69bb 2021-05-17 op static void
455 de2a69bb 2021-05-17 op handle_file_open(struct imsg *imsg, size_t datalen)
456 de2a69bb 2021-05-17 op {
457 de2a69bb 2021-05-17 op 	char	*path, *e;
458 de2a69bb 2021-05-17 op 	int	 fd;
459 de2a69bb 2021-05-17 op 
460 de2a69bb 2021-05-17 op 	path = imsg->data;
461 de2a69bb 2021-05-17 op 	if (path[datalen-1] != '\0')
462 de2a69bb 2021-05-17 op 		die();
463 de2a69bb 2021-05-17 op 
464 de2a69bb 2021-05-17 op 	if ((fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0644)) == -1) {
465 de2a69bb 2021-05-17 op 		e = strerror(errno);
466 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, -1,
467 de2a69bb 2021-05-17 op 		    e, strlen(e)+1);
468 de2a69bb 2021-05-17 op 	} else
469 bc10f6a5 2021-07-12 op 		fs_send_ui(IMSG_FILE_OPENED, imsg->hdr.peerid, fd,
470 de2a69bb 2021-05-17 op 		    NULL, 0);
471 3a227e9a 2021-03-18 op }
472 3a227e9a 2021-03-18 op 
473 3a227e9a 2021-03-18 op static void
474 c7107cec 2021-04-01 op handle_session_start(struct imsg *imsg, size_t datalen)
475 c7107cec 2021-04-01 op {
476 c7107cec 2021-04-01 op 	if (datalen != 0)
477 c7107cec 2021-04-01 op 		die();
478 c7107cec 2021-04-01 op 
479 c7107cec 2021-04-01 op 	if ((session = fopen(session_file, "w")) == NULL)
480 c7107cec 2021-04-01 op 		die();
481 c7107cec 2021-04-01 op }
482 c7107cec 2021-04-01 op 
483 c7107cec 2021-04-01 op static void
484 c7107cec 2021-04-01 op handle_session_tab(struct imsg *imsg, size_t datalen)
485 c7107cec 2021-04-01 op {
486 87e3e801 2021-07-17 op 	char		*url;
487 87e3e801 2021-07-17 op 	uint32_t	 flags;
488 58df4f47 2021-07-17 op 
489 c7107cec 2021-04-01 op 	if (session == NULL)
490 c7107cec 2021-04-01 op 		die();
491 c7107cec 2021-04-01 op 
492 87e3e801 2021-07-17 op 	flags = imsg->hdr.peerid;
493 58df4f47 2021-07-17 op 	url = imsg->data;
494 58df4f47 2021-07-17 op 	if (datalen == 0 || url[datalen-1] != '\0')
495 c7107cec 2021-04-01 op 		die();
496 58df4f47 2021-07-17 op 	fprintf(session, "%s", url);
497 87e3e801 2021-07-17 op 
498 87e3e801 2021-07-17 op 	if (flags & TAB_CURRENT)
499 2f524b17 2021-07-17 op 		fprintf(session, " current ");
500 2f524b17 2021-07-17 op 	else
501 2f524b17 2021-07-17 op 		fprintf(session, " - ");
502 2f524b17 2021-07-17 op }
503 87e3e801 2021-07-17 op 
504 2f524b17 2021-07-17 op static void
505 2f524b17 2021-07-17 op handle_session_tab_title(struct imsg *imsg, size_t datalen)
506 2f524b17 2021-07-17 op {
507 2f524b17 2021-07-17 op 	const char	*title;
508 2f524b17 2021-07-17 op 
509 2f524b17 2021-07-17 op 	title = imsg->data;
510 2f524b17 2021-07-17 op 	if (title == NULL) {
511 2f524b17 2021-07-17 op 		datalen = 1;
512 2f524b17 2021-07-17 op 		title = "";
513 2f524b17 2021-07-17 op 	}
514 2f524b17 2021-07-17 op 
515 2f524b17 2021-07-17 op 	if (title[datalen-1] != '\0')
516 2f524b17 2021-07-17 op 		die();
517 2f524b17 2021-07-17 op 
518 2f524b17 2021-07-17 op 	fprintf(session, "%s\n", title);
519 c7107cec 2021-04-01 op }
520 c7107cec 2021-04-01 op 
521 c7107cec 2021-04-01 op static void
522 c7107cec 2021-04-01 op handle_session_end(struct imsg *imsg, size_t datalen)
523 c7107cec 2021-04-01 op {
524 c7107cec 2021-04-01 op 	if (session == NULL)
525 c7107cec 2021-04-01 op 		die();
526 c7107cec 2021-04-01 op 	fclose(session);
527 c7107cec 2021-04-01 op 	session = NULL;
528 c7107cec 2021-04-01 op }
529 c7107cec 2021-04-01 op 
530 c7107cec 2021-04-01 op static void
531 1304bbdd 2021-03-15 op handle_dispatch_imsg(int fd, short ev, void *d)
532 35e1f40a 2021-03-14 op {
533 bc10f6a5 2021-07-12 op 	struct imsgev	*iev = d;
534 ea080950 2021-07-20 op 	int		 e;
535 ea080950 2021-07-20 op 
536 ea080950 2021-07-20 op 	if (dispatch_imsg(iev, ev, handlers, sizeof(handlers)) == -1) {
537 ea080950 2021-07-20 op 		/*
538 eb2ed626 2021-10-07 op 		 * This should leave a ~/.cache/telescope/crashed file to
539 ea080950 2021-07-20 op 		 * trigger about:crash on next run.  Unfortunately, if
540 ea080950 2021-07-20 op 		 * the main process dies the fs sticks around and
541 ea080950 2021-07-20 op 		 * doesn't notice that the fd was closed.  Why EV_READ
542 ea080950 2021-07-20 op 		 * is not triggered when a fd is closed on the other end?
543 ea080950 2021-07-20 op 		 */
544 ea080950 2021-07-20 op 		e = errno;
545 ea080950 2021-07-20 op 		if ((fd = open(crashed_file, O_CREAT|O_TRUNC|O_WRONLY, 0600))
546 ea080950 2021-07-20 op 		    == -1)
547 ea080950 2021-07-20 op 			err(1, "open");
548 ea080950 2021-07-20 op 		close(fd);
549 ea080950 2021-07-20 op 		errx(1, "connection closed: %s", strerror(e));
550 ea080950 2021-07-20 op 	}
551 35e1f40a 2021-03-14 op }
552 35e1f40a 2021-03-14 op 
553 bc10f6a5 2021-07-12 op static int
554 bc10f6a5 2021-07-12 op fs_send_ui(int type, uint32_t peerid, int fd, const void *data,
555 bc10f6a5 2021-07-12 op     uint16_t datalen)
556 bc10f6a5 2021-07-12 op {
557 bc10f6a5 2021-07-12 op 	return imsg_compose_event(iev_ui, type, peerid, 0, fd,
558 bc10f6a5 2021-07-12 op 	    data, datalen);
559 bc10f6a5 2021-07-12 op }
560 bc10f6a5 2021-07-12 op 
561 eb2ed626 2021-10-07 op static size_t
562 eb2ed626 2021-10-07 op join_path(char *buf, const char *lhs, const char *rhs, size_t buflen)
563 35e1f40a 2021-03-14 op {
564 eb2ed626 2021-10-07 op 	strlcpy(buf, lhs, buflen);
565 eb2ed626 2021-10-07 op 	return strlcat(buf, rhs, buflen);
566 eb2ed626 2021-10-07 op }
567 d0fd368a 2021-07-15 op 
568 eb2ed626 2021-10-07 op static void
569 eb2ed626 2021-10-07 op getenv_default(char *buf, const char *name, const char *def, size_t buflen)
570 eb2ed626 2021-10-07 op {
571 eb2ed626 2021-10-07 op 	size_t ret;
572 eb2ed626 2021-10-07 op 	char *home, *env;
573 740f578b 2021-03-15 op 
574 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
575 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
576 3a227e9a 2021-03-18 op 
577 eb2ed626 2021-10-07 op 	if ((env = getenv(name)) != NULL)
578 eb2ed626 2021-10-07 op 		ret = strlcpy(buf, env, buflen);
579 eb2ed626 2021-10-07 op 	else
580 eb2ed626 2021-10-07 op 		ret = join_path(buf, home, def, buflen);
581 288fd238 2021-04-25 op 
582 eb2ed626 2021-10-07 op 	if (ret >= buflen)
583 eb2ed626 2021-10-07 op 		errx(1, "buffer too small for %s", name);
584 eb2ed626 2021-10-07 op }
585 c7107cec 2021-04-01 op 
586 eb2ed626 2021-10-07 op static void
587 eb2ed626 2021-10-07 op mkdirs(const char *path, mode_t mode)
588 eb2ed626 2021-10-07 op {
589 444dad86 2021-10-07 op 	char copy[PATH_MAX+1], orig[PATH_MAX+1], *parent;
590 ea080950 2021-07-20 op 
591 eb2ed626 2021-10-07 op 	strlcpy(copy, path, sizeof(copy));
592 444dad86 2021-10-07 op 	strlcpy(orig, path, sizeof(orig));
593 eb2ed626 2021-10-07 op 	parent = dirname(copy);
594 eb2ed626 2021-10-07 op 	if (!strcmp(parent, "/"))
595 eb2ed626 2021-10-07 op 		return;
596 eb2ed626 2021-10-07 op 	mkdirs(parent, mode);
597 eb2ed626 2021-10-07 op 
598 444dad86 2021-10-07 op 	if (mkdir(orig, mode) != 0) {
599 eb2ed626 2021-10-07 op 		if (errno == EEXIST)
600 eb2ed626 2021-10-07 op 			return;
601 444dad86 2021-10-07 op 		err(1, "can't mkdir %s", orig);
602 eb2ed626 2021-10-07 op 	}
603 eb2ed626 2021-10-07 op }
604 eb2ed626 2021-10-07 op 
605 eb2ed626 2021-10-07 op static void
606 eb2ed626 2021-10-07 op xdg_init(void)
607 eb2ed626 2021-10-07 op {
608 eb2ed626 2021-10-07 op 	char *home, old_path[PATH_MAX];
609 eb2ed626 2021-10-07 op 	struct stat info;
610 eb2ed626 2021-10-07 op 
611 eb2ed626 2021-10-07 op 	/* old path */
612 eb2ed626 2021-10-07 op 	if ((home = getenv("HOME")) == NULL)
613 eb2ed626 2021-10-07 op 		errx(1, "HOME is not defined");
614 eb2ed626 2021-10-07 op 	join_path(old_path, home, "/.telescope", sizeof(old_path));
615 eb2ed626 2021-10-07 op 
616 eb2ed626 2021-10-07 op 	/* if ~/.telescope exists, use that instead of xdg dirs */
617 eb2ed626 2021-10-07 op 	if (stat(old_path, &info) == 0 && S_ISDIR(info.st_mode)) {
618 eb2ed626 2021-10-07 op 		join_path(config_path_base, home, "/.telescope",
619 eb2ed626 2021-10-07 op 		    sizeof(config_path_base));
620 eb2ed626 2021-10-07 op 		join_path(data_path_base, home, "/.telescope",
621 eb2ed626 2021-10-07 op 		    sizeof(data_path_base));
622 eb2ed626 2021-10-07 op 		join_path(cache_path_base, home, "/.telescope",
623 eb2ed626 2021-10-07 op 		    sizeof(cache_path_base));
624 eb2ed626 2021-10-07 op 		return;
625 eb2ed626 2021-10-07 op 	}
626 eb2ed626 2021-10-07 op 
627 eb2ed626 2021-10-07 op 	/* xdg paths */
628 eb2ed626 2021-10-07 op 	getenv_default(xdg_config_base, "XDG_CONFIG_HOME", "/.config",
629 eb2ed626 2021-10-07 op 	    sizeof(xdg_config_base));
630 eb2ed626 2021-10-07 op 	getenv_default(xdg_data_base, "XDG_DATA_HOME", "/.local/share",
631 eb2ed626 2021-10-07 op 	    sizeof(xdg_data_base));
632 eb2ed626 2021-10-07 op 	getenv_default(xdg_cache_base, "XDG_CACHE_HOME", "/.cache",
633 eb2ed626 2021-10-07 op 	    sizeof(xdg_cache_base));
634 eb2ed626 2021-10-07 op 
635 eb2ed626 2021-10-07 op 	join_path(config_path_base, xdg_config_base, "/telescope",
636 eb2ed626 2021-10-07 op 	    sizeof(config_path_base));
637 eb2ed626 2021-10-07 op 	join_path(data_path_base, xdg_data_base, "/telescope",
638 eb2ed626 2021-10-07 op 	    sizeof(data_path_base));
639 eb2ed626 2021-10-07 op 	join_path(cache_path_base, xdg_cache_base, "/telescope",
640 eb2ed626 2021-10-07 op 	    sizeof(cache_path_base));
641 eb2ed626 2021-10-07 op 
642 eb2ed626 2021-10-07 op 	mkdirs(xdg_config_base, S_IRWXU);
643 eb2ed626 2021-10-07 op 	mkdirs(xdg_data_base, S_IRWXU);
644 eb2ed626 2021-10-07 op 	mkdirs(xdg_cache_base, S_IRWXU);
645 eb2ed626 2021-10-07 op 
646 eb2ed626 2021-10-07 op 	mkdirs(config_path_base, S_IRWXU);
647 eb2ed626 2021-10-07 op 	mkdirs(data_path_base, S_IRWXU);
648 eb2ed626 2021-10-07 op 	mkdirs(cache_path_base, S_IRWXU);
649 eb2ed626 2021-10-07 op }
650 eb2ed626 2021-10-07 op 
651 eb2ed626 2021-10-07 op int
652 eb2ed626 2021-10-07 op fs_init(void)
653 eb2ed626 2021-10-07 op {
654 eb2ed626 2021-10-07 op 	xdg_init();
655 eb2ed626 2021-10-07 op 
656 eb2ed626 2021-10-07 op 	join_path(config_path, config_path_base, "/config",
657 eb2ed626 2021-10-07 op 	    sizeof(config_path));
658 eb2ed626 2021-10-07 op 	join_path(lockfile_path, cache_path_base, "/lock",
659 eb2ed626 2021-10-07 op 	    sizeof(lockfile_path));
660 eb2ed626 2021-10-07 op 	join_path(bookmark_file, data_path_base, "/bookmarks.gmi",
661 eb2ed626 2021-10-07 op 	    sizeof(bookmark_file));
662 eb2ed626 2021-10-07 op 	join_path(known_hosts_file, data_path_base, "/known_hosts",
663 eb2ed626 2021-10-07 op 	    sizeof(known_hosts_file));
664 eb2ed626 2021-10-07 op 	join_path(known_hosts_tmp, cache_path_base,
665 eb2ed626 2021-10-07 op 	    "/known_hosts.tmp.XXXXXXXXXX", sizeof(known_hosts_tmp));
666 eb2ed626 2021-10-07 op 	join_path(session_file, cache_path_base, "/session",
667 eb2ed626 2021-10-07 op 	    sizeof(session_file));
668 eb2ed626 2021-10-07 op 	join_path(crashed_file, cache_path_base, "/crashed",
669 eb2ed626 2021-10-07 op 	    sizeof(crashed_file));
670 eb2ed626 2021-10-07 op 
671 3a227e9a 2021-03-18 op 	return 1;
672 3a227e9a 2021-03-18 op }
673 3a227e9a 2021-03-18 op 
674 3a227e9a 2021-03-18 op int
675 6cc5fcfe 2021-07-08 op fs_main(void)
676 3a227e9a 2021-03-18 op {
677 6cc5fcfe 2021-07-08 op 	setproctitle("fs");
678 3a227e9a 2021-03-18 op 
679 6cc5fcfe 2021-07-08 op 	fs_init();
680 6cc5fcfe 2021-07-08 op 
681 35e1f40a 2021-03-14 op 	event_init();
682 35e1f40a 2021-03-14 op 
683 bc10f6a5 2021-07-12 op 	/* Setup pipe and event handler to the main process */
684 bc10f6a5 2021-07-12 op 	if ((iev_ui = malloc(sizeof(*iev_ui))) == NULL)
685 6cc5fcfe 2021-07-08 op 		die();
686 bc10f6a5 2021-07-12 op 	imsg_init(&iev_ui->ibuf, 3);
687 bc10f6a5 2021-07-12 op 	iev_ui->handler = handle_dispatch_imsg;
688 bc10f6a5 2021-07-12 op 	iev_ui->events = EV_READ;
689 bc10f6a5 2021-07-12 op 	event_set(&iev_ui->ev, iev_ui->ibuf.fd, iev_ui->events,
690 bc10f6a5 2021-07-12 op 	    iev_ui->handler, iev_ui);
691 bc10f6a5 2021-07-12 op 	event_add(&iev_ui->ev, NULL);
692 35e1f40a 2021-03-14 op 
693 35e1f40a 2021-03-14 op 	sandbox_fs_process();
694 35e1f40a 2021-03-14 op 
695 35e1f40a 2021-03-14 op 	event_dispatch();
696 35e1f40a 2021-03-14 op 	return 0;
697 35e1f40a 2021-03-14 op }
698 3a227e9a 2021-03-18 op 
699 3a227e9a 2021-03-18 op 
700 d0fd368a 2021-07-15 op 
701 be97d6e6 2021-08-15 op /*
702 be97d6e6 2021-08-15 op  * Check if the last time telescope crashed.  The check is done by
703 be97d6e6 2021-08-15 op  * looking at `crashed_file': if it exists then last time we crashed.
704 be97d6e6 2021-08-15 op  * Then, while here, touch the file too.  During IMSG_QUIT we'll
705 be97d6e6 2021-08-15 op  * remove it.
706 be97d6e6 2021-08-15 op  */
707 d0fd368a 2021-07-15 op int
708 b6171794 2021-07-20 op last_time_crashed(void)
709 b6171794 2021-07-20 op {
710 be97d6e6 2021-08-15 op 	int fd, crashed = 1;
711 b6171794 2021-07-20 op 
712 2b409042 2021-09-15 op 	if (safe_mode)
713 2b409042 2021-09-15 op 		return 0;
714 2b409042 2021-09-15 op 
715 be97d6e6 2021-08-15 op 	if (unlink(crashed_file) == -1 && errno == ENOENT)
716 be97d6e6 2021-08-15 op 		crashed = 0;
717 be97d6e6 2021-08-15 op 
718 be97d6e6 2021-08-15 op 	if ((fd = open(crashed_file, O_CREAT|O_WRONLY, 0600)) == -1)
719 be97d6e6 2021-08-15 op 		return crashed;
720 b6171794 2021-07-20 op 	close(fd);
721 be97d6e6 2021-08-15 op 
722 be97d6e6 2021-08-15 op 	return crashed;
723 b6171794 2021-07-20 op }
724 b6171794 2021-07-20 op 
725 b6171794 2021-07-20 op int
726 d0fd368a 2021-07-15 op lock_session(void)
727 d0fd368a 2021-07-15 op {
728 d0fd368a 2021-07-15 op 	struct flock	lock;
729 d0fd368a 2021-07-15 op 	int		fd;
730 d0fd368a 2021-07-15 op 
731 d0fd368a 2021-07-15 op 	if ((fd = open(lockfile_path, O_WRONLY|O_CREAT, 0600)) == -1)
732 d0fd368a 2021-07-15 op 		return -1;
733 d0fd368a 2021-07-15 op 
734 d0fd368a 2021-07-15 op 	lock.l_start = 0;
735 d0fd368a 2021-07-15 op 	lock.l_len = 0;
736 d0fd368a 2021-07-15 op 	lock.l_type = F_WRLCK;
737 d0fd368a 2021-07-15 op 	lock.l_whence = SEEK_SET;
738 c6d03cf5 2021-04-25 op 
739 d0fd368a 2021-07-15 op 	if (fcntl(fd, F_SETLK, &lock) == -1) {
740 d0fd368a 2021-07-15 op 		close(fd);
741 d0fd368a 2021-07-15 op 		return -1;
742 d0fd368a 2021-07-15 op 	}
743 d0fd368a 2021-07-15 op 
744 d0fd368a 2021-07-15 op 	return fd;
745 d0fd368a 2021-07-15 op }
746 d0fd368a 2021-07-15 op 
747 c6d03cf5 2021-04-25 op static int
748 c6d03cf5 2021-04-25 op parse_khost_line(char *line, char *tmp[3])
749 c6d03cf5 2021-04-25 op {
750 c6d03cf5 2021-04-25 op 	char **ap;
751 c6d03cf5 2021-04-25 op 
752 c6d03cf5 2021-04-25 op 	for (ap = tmp; ap < &tmp[3] &&
753 c6d03cf5 2021-04-25 op 	    (*ap = strsep(&line, " \t\n")) != NULL;) {
754 c6d03cf5 2021-04-25 op 		if (**ap != '\0')
755 c6d03cf5 2021-04-25 op 			ap++;
756 c6d03cf5 2021-04-25 op 	}
757 3a227e9a 2021-03-18 op 
758 c6d03cf5 2021-04-25 op 	return ap == &tmp[3] && *line == '\0';
759 c6d03cf5 2021-04-25 op }
760 c6d03cf5 2021-04-25 op 
761 3a227e9a 2021-03-18 op int
762 3a227e9a 2021-03-18 op load_certs(struct ohash *h)
763 3a227e9a 2021-03-18 op {
764 c6d03cf5 2021-04-25 op 	char		*tmp[3], *line = NULL;
765 6cd6a9e1 2021-03-20 op 	const char	*errstr;
766 ec1fa0b0 2021-04-25 op 	size_t		 lineno = 0, linesize = 0;
767 3a227e9a 2021-03-18 op 	ssize_t		 linelen;
768 3a227e9a 2021-03-18 op 	FILE		*f;
769 3a227e9a 2021-03-18 op 	struct tofu_entry *e;
770 3a227e9a 2021-03-18 op 
771 3a227e9a 2021-03-18 op 	if ((f = fopen(known_hosts_file, "r")) == NULL)
772 3a227e9a 2021-03-18 op 		return 0;
773 3a227e9a 2021-03-18 op 
774 3a227e9a 2021-03-18 op 	while ((linelen = getline(&line, &linesize, f)) != -1) {
775 3a227e9a 2021-03-18 op 		if ((e = calloc(1, sizeof(*e))) == NULL)
776 3a227e9a 2021-03-18 op 			abort();
777 3a227e9a 2021-03-18 op 
778 ec1fa0b0 2021-04-25 op 		lineno++;
779 3a227e9a 2021-03-18 op 
780 c6d03cf5 2021-04-25 op 		if (parse_khost_line(line, tmp)) {
781 c6d03cf5 2021-04-25 op 			strlcpy(e->domain, tmp[0], sizeof(e->domain));
782 c6d03cf5 2021-04-25 op 			strlcpy(e->hash, tmp[1], sizeof(e->hash));
783 3a227e9a 2021-03-18 op 
784 c6d03cf5 2021-04-25 op 			e->verified = strtonum(tmp[2], 0, 1, &errstr);
785 c6d03cf5 2021-04-25 op 			if (errstr != NULL)
786 c6d03cf5 2021-04-25 op 				errx(1, "%s:%zu verification for %s is %s: %s",
787 c6d03cf5 2021-04-25 op 				    known_hosts_file, lineno,
788 c6d03cf5 2021-04-25 op 				    e->domain, errstr, tmp[2]);
789 c6d03cf5 2021-04-25 op 			tofu_add(h, e);
790 c6d03cf5 2021-04-25 op 		} else {
791 ec1fa0b0 2021-04-25 op 			warnx("%s:%zu invalid entry",
792 ec1fa0b0 2021-04-25 op 			    known_hosts_file, lineno);
793 ec1fa0b0 2021-04-25 op 			free(e);
794 c6d03cf5 2021-04-25 op 		}
795 3a227e9a 2021-03-18 op 	}
796 3a227e9a 2021-03-18 op 
797 3a227e9a 2021-03-18 op 	free(line);
798 3a227e9a 2021-03-18 op 	return ferror(f);
799 3a227e9a 2021-03-18 op }
800 c7107cec 2021-04-01 op