1 a596b957 2022-07-14 tracey /*
  2 a596b957 2022-07-14 tracey  * Copyright (c) 2016, 2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
  3 a596b957 2022-07-14 tracey  * Copyright (c) 2015 Reyk Floeter <reyk@openbsd.org>
  4 a596b957 2022-07-14 tracey  *
  5 a596b957 2022-07-14 tracey  * Permission to use, copy, modify, and distribute this software for any
  6 a596b957 2022-07-14 tracey  * purpose with or without fee is hereby granted, provided that the above
  7 a596b957 2022-07-14 tracey  * copyright notice and this permission notice appear in all copies.
  8 a596b957 2022-07-14 tracey  *
  9 a596b957 2022-07-14 tracey  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 10 a596b957 2022-07-14 tracey  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 11 a596b957 2022-07-14 tracey  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 12 a596b957 2022-07-14 tracey  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 13 a596b957 2022-07-14 tracey  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 14 a596b957 2022-07-14 tracey  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 15 a596b957 2022-07-14 tracey  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 16 a596b957 2022-07-14 tracey  */
 17 a596b957 2022-07-14 tracey 
 18 a596b957 2022-07-14 tracey #include <sys/param.h>
 19 a596b957 2022-07-14 tracey #include <sys/queue.h>
 20 a596b957 2022-07-14 tracey #include <sys/socket.h>
 21 a596b957 2022-07-14 tracey #include <sys/wait.h>
 22 a596b957 2022-07-14 tracey 
 23 a596b957 2022-07-14 tracey #include <net/if.h>
 24 a596b957 2022-07-14 tracey #include <netinet/in.h>
 25 a596b957 2022-07-14 tracey 
 26 a596b957 2022-07-14 tracey #include <stdio.h>
 27 a596b957 2022-07-14 tracey #include <stdlib.h>
 28 a596b957 2022-07-14 tracey #include <string.h>
 29 a596b957 2022-07-14 tracey #include <termios.h>
 30 a596b957 2022-07-14 tracey #include <err.h>
 31 a596b957 2022-07-14 tracey #include <errno.h>
 32 a596b957 2022-07-14 tracey #include <event.h>
 33 a596b957 2022-07-14 tracey #include <fcntl.h>
 34 a596b957 2022-07-14 tracey #include <imsg.h>
 35 a596b957 2022-07-14 tracey #include <pwd.h>
 36 a596b957 2022-07-14 tracey #include <signal.h>
 37 a596b957 2022-07-14 tracey #include <syslog.h>
 38 a596b957 2022-07-14 tracey #include <unistd.h>
 39 a596b957 2022-07-14 tracey #include <ctype.h>
 40 a596b957 2022-07-14 tracey #include <util.h>
 41 a596b957 2022-07-14 tracey 
 42 a596b957 2022-07-14 tracey #include "got_opentemp.h"
 43 df2d3cd2 2023-03-11 op #include "got_reference.h"
 44 a596b957 2022-07-14 tracey 
 45 a596b957 2022-07-14 tracey #include "gotwebd.h"
 46 1220d7ea 2024-05-21 op #include "log.h"
 47 a596b957 2022-07-14 tracey 
 48 a596b957 2022-07-14 tracey __dead void usage(void);
 49 a596b957 2022-07-14 tracey 
 50 a596b957 2022-07-14 tracey int	 main(int, char **);
 51 a596b957 2022-07-14 tracey int	 gotwebd_configure(struct gotwebd *);
 52 a596b957 2022-07-14 tracey void	 gotwebd_configure_done(struct gotwebd *);
 53 a596b957 2022-07-14 tracey void	 gotwebd_sighdlr(int sig, short event, void *arg);
 54 a596b957 2022-07-14 tracey void	 gotwebd_shutdown(void);
 55 26678add 2023-11-16 op void	 gotwebd_dispatch_sockets(int, short, void *);
 56 a596b957 2022-07-14 tracey 
 57 a596b957 2022-07-14 tracey struct gotwebd	*gotwebd_env;
 58 a596b957 2022-07-14 tracey 
 59 26678add 2023-11-16 op void
 60 26678add 2023-11-16 op imsg_event_add(struct imsgev *iev)
 61 26678add 2023-11-16 op {
 62 26678add 2023-11-16 op 	if (iev->handler == NULL) {
 63 26678add 2023-11-16 op 		imsg_flush(&iev->ibuf);
 64 26678add 2023-11-16 op 		return;
 65 26678add 2023-11-16 op 	}
 66 a596b957 2022-07-14 tracey 
 67 26678add 2023-11-16 op 	iev->events = EV_READ;
 68 26678add 2023-11-16 op 	if (iev->ibuf.w.queued)
 69 26678add 2023-11-16 op 		iev->events |= EV_WRITE;
 70 26678add 2023-11-16 op 
 71 26678add 2023-11-16 op 	event_del(&iev->ev);
 72 26678add 2023-11-16 op 	event_set(&iev->ev, iev->ibuf.fd, iev->events, iev->handler, iev->data);
 73 26678add 2023-11-16 op 	event_add(&iev->ev, NULL);
 74 26678add 2023-11-16 op }
 75 26678add 2023-11-16 op 
 76 a596b957 2022-07-14 tracey int
 77 26678add 2023-11-16 op imsg_compose_event(struct imsgev *iev, uint16_t type, uint32_t peerid,
 78 26678add 2023-11-16 op     pid_t pid, int fd, const void *data, uint16_t datalen)
 79 a596b957 2022-07-14 tracey {
 80 26678add 2023-11-16 op 	int ret;
 81 a596b957 2022-07-14 tracey 
 82 26678add 2023-11-16 op 	ret = imsg_compose(&iev->ibuf, type, peerid, pid, fd, data, datalen);
 83 26678add 2023-11-16 op 	if (ret == -1)
 84 26678add 2023-11-16 op 		return (ret);
 85 26678add 2023-11-16 op 	imsg_event_add(iev);
 86 26678add 2023-11-16 op 	return (ret);
 87 26678add 2023-11-16 op }
 88 26678add 2023-11-16 op 
 89 26678add 2023-11-16 op int
 90 26678add 2023-11-16 op main_compose_sockets(struct gotwebd *env, uint32_t type, int fd,
 91 26678add 2023-11-16 op     const void *data, uint16_t len)
 92 26678add 2023-11-16 op {
 93 26678add 2023-11-16 op 	size_t	 i;
 94 26678add 2023-11-16 op 	int	 ret, d;
 95 26678add 2023-11-16 op 
 96 26678add 2023-11-16 op 	for (i = 0; i < env->nserver; ++i) {
 97 26678add 2023-11-16 op 		d = -1;
 98 26678add 2023-11-16 op 		if (fd != -1 && (d = dup(fd)) == -1)
 99 b2ce8090 2023-11-16 op 			goto err;
100 26678add 2023-11-16 op 
101 26678add 2023-11-16 op 		ret = imsg_compose_event(&env->iev_server[i], type, 0, -1,
102 26678add 2023-11-16 op 		    d, data, len);
103 26678add 2023-11-16 op 		if (ret == -1)
104 b2ce8090 2023-11-16 op 			goto err;
105 26678add 2023-11-16 op 
106 26678add 2023-11-16 op 		/* prevent fd exhaustion */
107 26678add 2023-11-16 op 		if (d != -1) {
108 26678add 2023-11-16 op 			do {
109 26678add 2023-11-16 op 				ret = imsg_flush(&env->iev_server[i].ibuf);
110 26678add 2023-11-16 op 			} while (ret == -1 && errno == EAGAIN);
111 26678add 2023-11-16 op 			if (ret == -1)
112 b2ce8090 2023-11-16 op 				goto err;
113 26678add 2023-11-16 op 			imsg_event_add(&env->iev_server[i]);
114 26678add 2023-11-16 op 		}
115 a596b957 2022-07-14 tracey 	}
116 a596b957 2022-07-14 tracey 
117 26678add 2023-11-16 op 	if (fd != -1)
118 26678add 2023-11-16 op 		close(fd);
119 26678add 2023-11-16 op 	return 0;
120 b2ce8090 2023-11-16 op 
121 b2ce8090 2023-11-16 op err:
122 b2ce8090 2023-11-16 op 	if (fd != -1)
123 b2ce8090 2023-11-16 op 		close(fd);
124 b2ce8090 2023-11-16 op 	return -1;
125 a596b957 2022-07-14 tracey }
126 a596b957 2022-07-14 tracey 
127 26678add 2023-11-16 op int
128 26678add 2023-11-16 op sockets_compose_main(struct gotwebd *env, uint32_t type, const void *d,
129 26678add 2023-11-16 op     uint16_t len)
130 26678add 2023-11-16 op {
131 26678add 2023-11-16 op 	return (imsg_compose_event(env->iev_parent, type, 0, -1, -1, d, len));
132 26678add 2023-11-16 op }
133 26678add 2023-11-16 op 
134 a596b957 2022-07-14 tracey void
135 26678add 2023-11-16 op gotwebd_dispatch_sockets(int fd, short event, void *arg)
136 26678add 2023-11-16 op {
137 26678add 2023-11-16 op 	struct imsgev		*iev = arg;
138 26678add 2023-11-16 op 	struct imsgbuf		*ibuf;
139 26678add 2023-11-16 op 	struct imsg		 imsg;
140 26678add 2023-11-16 op 	struct gotwebd		*env = gotwebd_env;
141 26678add 2023-11-16 op 	ssize_t			 n;
142 26678add 2023-11-16 op 	int			 shut = 0;
143 26678add 2023-11-16 op 
144 26678add 2023-11-16 op 	ibuf = &iev->ibuf;
145 26678add 2023-11-16 op 
146 26678add 2023-11-16 op 	if (event & EV_READ) {
147 26678add 2023-11-16 op 		if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN)
148 26678add 2023-11-16 op 			fatal("imsg_read error");
149 26678add 2023-11-16 op 		if (n == 0)	/* Connection closed */
150 26678add 2023-11-16 op 			shut = 1;
151 26678add 2023-11-16 op 	}
152 26678add 2023-11-16 op 	if (event & EV_WRITE) {
153 26678add 2023-11-16 op 		if ((n = msgbuf_write(&ibuf->w)) == -1 && errno != EAGAIN)
154 26678add 2023-11-16 op 			fatal("msgbuf_write");
155 26678add 2023-11-16 op 		if (n == 0)	/* Connection closed */
156 26678add 2023-11-16 op 			shut = 1;
157 26678add 2023-11-16 op 	}
158 26678add 2023-11-16 op 
159 26678add 2023-11-16 op 	for (;;) {
160 26678add 2023-11-16 op 		if ((n = imsg_get(ibuf, &imsg)) == -1)
161 26678add 2023-11-16 op 			fatal("imsg_get");
162 26678add 2023-11-16 op 		if (n == 0)	/* No more messages. */
163 26678add 2023-11-16 op 			break;
164 26678add 2023-11-16 op 
165 26678add 2023-11-16 op 		switch (imsg.hdr.type) {
166 26678add 2023-11-16 op 		case IMSG_CFG_DONE:
167 26678add 2023-11-16 op 			gotwebd_configure_done(env);
168 26678add 2023-11-16 op 			break;
169 26678add 2023-11-16 op 		default:
170 26678add 2023-11-16 op 			fatalx("%s: unknown imsg type %d", __func__,
171 26678add 2023-11-16 op 			    imsg.hdr.type);
172 26678add 2023-11-16 op 		}
173 26678add 2023-11-16 op 
174 26678add 2023-11-16 op 		imsg_free(&imsg);
175 26678add 2023-11-16 op 	}
176 26678add 2023-11-16 op 
177 26678add 2023-11-16 op 	if (!shut)
178 26678add 2023-11-16 op 		imsg_event_add(iev);
179 26678add 2023-11-16 op 	else {
180 26678add 2023-11-16 op 		/* This pipe is dead.  Remove its event handler */
181 26678add 2023-11-16 op 		event_del(&iev->ev);
182 26678add 2023-11-16 op 		event_loopexit(NULL);
183 26678add 2023-11-16 op 	}
184 26678add 2023-11-16 op }
185 26678add 2023-11-16 op 
186 26678add 2023-11-16 op void
187 a596b957 2022-07-14 tracey gotwebd_sighdlr(int sig, short event, void *arg)
188 a596b957 2022-07-14 tracey {
189 a596b957 2022-07-14 tracey 	/* struct privsep	*ps = arg; */
190 a596b957 2022-07-14 tracey 
191 a596b957 2022-07-14 tracey 	switch (sig) {
192 a596b957 2022-07-14 tracey 	case SIGHUP:
193 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGHUP", __func__);
194 a596b957 2022-07-14 tracey 		break;
195 a596b957 2022-07-14 tracey 	case SIGPIPE:
196 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGPIPE", __func__);
197 a596b957 2022-07-14 tracey 		break;
198 a596b957 2022-07-14 tracey 	case SIGUSR1:
199 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGUSR1", __func__);
200 a596b957 2022-07-14 tracey 		break;
201 a596b957 2022-07-14 tracey 	case SIGTERM:
202 a596b957 2022-07-14 tracey 	case SIGINT:
203 a596b957 2022-07-14 tracey 		gotwebd_shutdown();
204 a596b957 2022-07-14 tracey 		break;
205 a596b957 2022-07-14 tracey 	default:
206 a596b957 2022-07-14 tracey 		fatalx("unexpected signal");
207 a596b957 2022-07-14 tracey 	}
208 a596b957 2022-07-14 tracey }
209 a596b957 2022-07-14 tracey 
210 26678add 2023-11-16 op static int
211 26678add 2023-11-16 op spawn_socket_process(struct gotwebd *env, const char *argv0, int n)
212 26678add 2023-11-16 op {
213 c89c70b6 2024-05-27 op 	const char	*argv[6];
214 26678add 2023-11-16 op 	int		 argc = 0;
215 26678add 2023-11-16 op 	int		 p[2];
216 26678add 2023-11-16 op 	pid_t		 pid;
217 26678add 2023-11-16 op 
218 26678add 2023-11-16 op 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, p) == -1)
219 26678add 2023-11-16 op 		fatal("socketpair");
220 26678add 2023-11-16 op 
221 26678add 2023-11-16 op 	switch (pid = fork()) {
222 26678add 2023-11-16 op 	case -1:
223 26678add 2023-11-16 op 		fatal("fork");
224 26678add 2023-11-16 op 	case 0:		/* child */
225 26678add 2023-11-16 op 		break;
226 26678add 2023-11-16 op 	default:	/* parent */
227 26678add 2023-11-16 op 		close(p[0]);
228 26678add 2023-11-16 op 		imsg_init(&env->iev_server[n].ibuf, p[1]);
229 26678add 2023-11-16 op 		env->iev_server[n].handler = gotwebd_dispatch_sockets;
230 26678add 2023-11-16 op 		env->iev_server[n].data = &env->iev_server[n];
231 26678add 2023-11-16 op 		event_set(&env->iev_server[n].ev, p[1], EV_READ,
232 26678add 2023-11-16 op 		    gotwebd_dispatch_sockets, &env->iev_server[n]);
233 26678add 2023-11-16 op 		event_add(&env->iev_server[n].ev, NULL);
234 26678add 2023-11-16 op 		return 0;
235 26678add 2023-11-16 op 	}
236 26678add 2023-11-16 op 
237 26678add 2023-11-16 op 	close(p[1]);
238 26678add 2023-11-16 op 
239 26678add 2023-11-16 op 	argv[argc++] = argv0;
240 26678add 2023-11-16 op 	argv[argc++] = "-S";
241 26678add 2023-11-16 op 	if (env->gotwebd_debug)
242 26678add 2023-11-16 op 		argv[argc++] = "-d";
243 c89c70b6 2024-05-27 op 	if (env->gotwebd_verbose > 0)
244 26678add 2023-11-16 op 		argv[argc++] = "-v";
245 c89c70b6 2024-05-27 op 	if (env->gotwebd_verbose > 1)
246 c89c70b6 2024-05-27 op 		argv[argc++] = "-v";
247 26678add 2023-11-16 op 	argv[argc] = NULL;
248 26678add 2023-11-16 op 
249 9ec8edf7 2023-11-16 op 	if (p[0] != GOTWEBD_SOCK_FILENO) {
250 9ec8edf7 2023-11-16 op 		if (dup2(p[0], GOTWEBD_SOCK_FILENO) == -1)
251 26678add 2023-11-16 op 			fatal("dup2");
252 26678add 2023-11-16 op 	} else if (fcntl(p[0], F_SETFD, 0) == -1)
253 26678add 2023-11-16 op 		fatal("fcntl");
254 26678add 2023-11-16 op 
255 26678add 2023-11-16 op 	/* obnoxious cast */
256 26678add 2023-11-16 op 	execvp(argv0, (char * const *)argv);
257 26678add 2023-11-16 op 	fatal("execvp %s", argv0);
258 26678add 2023-11-16 op }
259 26678add 2023-11-16 op 
260 a596b957 2022-07-14 tracey __dead void
261 a596b957 2022-07-14 tracey usage(void)
262 a596b957 2022-07-14 tracey {
263 a596b957 2022-07-14 tracey 	fprintf(stderr, "usage: %s [-dnv] [-D macro=value] [-f file]\n",
264 a596b957 2022-07-14 tracey 	    getprogname());
265 a596b957 2022-07-14 tracey 	exit(1);
266 a596b957 2022-07-14 tracey }
267 a596b957 2022-07-14 tracey 
268 a596b957 2022-07-14 tracey int
269 a596b957 2022-07-14 tracey main(int argc, char **argv)
270 a596b957 2022-07-14 tracey {
271 26678add 2023-11-16 op 	struct event		 sigint, sigterm, sighup, sigpipe, sigusr1;
272 26678add 2023-11-16 op 	struct gotwebd		*env;
273 26678add 2023-11-16 op 	struct passwd		*pw;
274 26678add 2023-11-16 op 	int			 ch, i;
275 26678add 2023-11-16 op 	int			 no_action = 0;
276 26678add 2023-11-16 op 	int			 server_proc = 0;
277 26678add 2023-11-16 op 	const char		*conffile = GOTWEBD_CONF;
278 9bc2ee80 2024-05-21 op 	const char		*username = GOTWEBD_DEFAULT_USER;
279 26678add 2023-11-16 op 	const char		*argv0;
280 a596b957 2022-07-14 tracey 
281 26678add 2023-11-16 op 	if ((argv0 = argv[0]) == NULL)
282 26678add 2023-11-16 op 		argv0 = "gotwebd";
283 ba5f8ecf 2023-11-16 op 
284 ba5f8ecf 2023-11-16 op 	/* log to stderr until daemonized */
285 ba5f8ecf 2023-11-16 op 	log_init(1, LOG_DAEMON);
286 26678add 2023-11-16 op 
287 a596b957 2022-07-14 tracey 	env = calloc(1, sizeof(*env));
288 a596b957 2022-07-14 tracey 	if (env == NULL)
289 a596b957 2022-07-14 tracey 		fatal("%s: calloc", __func__);
290 26678add 2023-11-16 op 	config_init(env);
291 5abbba2d 2023-11-15 op 
292 26678add 2023-11-16 op 	while ((ch = getopt(argc, argv, "D:df:nSv")) != -1) {
293 a596b957 2022-07-14 tracey 		switch (ch) {
294 a596b957 2022-07-14 tracey 		case 'D':
295 a596b957 2022-07-14 tracey 			if (cmdline_symset(optarg) < 0)
296 a596b957 2022-07-14 tracey 				log_warnx("could not parse macro definition %s",
297 a596b957 2022-07-14 tracey 				    optarg);
298 a596b957 2022-07-14 tracey 			break;
299 a596b957 2022-07-14 tracey 		case 'd':
300 26678add 2023-11-16 op 			env->gotwebd_debug = 1;
301 a596b957 2022-07-14 tracey 			break;
302 a596b957 2022-07-14 tracey 		case 'f':
303 a596b957 2022-07-14 tracey 			conffile = optarg;
304 a596b957 2022-07-14 tracey 			break;
305 a596b957 2022-07-14 tracey 		case 'n':
306 26678add 2023-11-16 op 			no_action = 1;
307 a596b957 2022-07-14 tracey 			break;
308 26678add 2023-11-16 op 		case 'S':
309 26678add 2023-11-16 op 			server_proc = 1;
310 a596b957 2022-07-14 tracey 			break;
311 6f319063 2022-10-27 stsp 		case 'v':
312 c89c70b6 2024-05-27 op 			if (env->gotwebd_verbose < 3)
313 c89c70b6 2024-05-27 op 				env->gotwebd_verbose++;
314 a596b957 2022-07-14 tracey 			break;
315 a596b957 2022-07-14 tracey 		default:
316 a596b957 2022-07-14 tracey 			usage();
317 a596b957 2022-07-14 tracey 		}
318 a596b957 2022-07-14 tracey 	}
319 a596b957 2022-07-14 tracey 
320 a596b957 2022-07-14 tracey 	argc -= optind;
321 a596b957 2022-07-14 tracey 	if (argc > 0)
322 a596b957 2022-07-14 tracey 		usage();
323 a596b957 2022-07-14 tracey 
324 a596b957 2022-07-14 tracey 	gotwebd_env = env;
325 a596b957 2022-07-14 tracey 	env->gotwebd_conffile = conffile;
326 a596b957 2022-07-14 tracey 
327 a596b957 2022-07-14 tracey 	if (parse_config(env->gotwebd_conffile, env) == -1)
328 a596b957 2022-07-14 tracey 		exit(1);
329 a596b957 2022-07-14 tracey 
330 26678add 2023-11-16 op 	if (no_action) {
331 26678add 2023-11-16 op 		fprintf(stderr, "configuration OK\n");
332 26678add 2023-11-16 op 		exit(0);
333 26678add 2023-11-16 op 	}
334 a596b957 2022-07-14 tracey 
335 a596b957 2022-07-14 tracey 	/* check for root privileges */
336 26678add 2023-11-16 op 	if (geteuid())
337 26678add 2023-11-16 op 		fatalx("need root privileges");
338 a596b957 2022-07-14 tracey 
339 9bc2ee80 2024-05-21 op 	if (env->user)
340 9bc2ee80 2024-05-21 op 		username = env->user;
341 9bc2ee80 2024-05-21 op 	pw = getpwnam(username);
342 26678add 2023-11-16 op 	if (pw == NULL)
343 9bc2ee80 2024-05-21 op 		fatalx("unknown user %s", username);
344 26678add 2023-11-16 op 	env->pw = pw;
345 a596b957 2022-07-14 tracey 
346 a596b957 2022-07-14 tracey 	log_init(env->gotwebd_debug, LOG_DAEMON);
347 a596b957 2022-07-14 tracey 	log_setverbose(env->gotwebd_verbose);
348 a596b957 2022-07-14 tracey 
349 26678add 2023-11-16 op 	if (server_proc) {
350 26678add 2023-11-16 op 		setproctitle("sockets");
351 26678add 2023-11-16 op 		log_procinit("sockets");
352 a596b957 2022-07-14 tracey 
353 60594467 2023-12-08 stsp 		if (chroot(env->httpd_chroot) == -1)
354 60594467 2023-12-08 stsp 			fatal("chroot %s", env->httpd_chroot);
355 26678add 2023-11-16 op 		if (chdir("/") == -1)
356 26678add 2023-11-16 op 			fatal("chdir /");
357 26678add 2023-11-16 op 		if (setgroups(1, &pw->pw_gid) == -1 ||
358 26678add 2023-11-16 op 		    setresgid(pw->pw_gid, pw->pw_gid, pw->pw_gid) == -1 ||
359 26678add 2023-11-16 op 		    setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1)
360 26678add 2023-11-16 op 			fatal("failed to drop privileges");
361 a596b957 2022-07-14 tracey 
362 9ec8edf7 2023-11-16 op 		sockets(env, GOTWEBD_SOCK_FILENO);
363 26678add 2023-11-16 op 		return 1;
364 26678add 2023-11-16 op 	}
365 a596b957 2022-07-14 tracey 
366 4056db63 2023-11-16 op 	if (!env->gotwebd_debug && daemon(1, 0) == -1)
367 26678add 2023-11-16 op 		fatal("daemon");
368 a596b957 2022-07-14 tracey 
369 a596b957 2022-07-14 tracey 	event_init();
370 a596b957 2022-07-14 tracey 
371 26678add 2023-11-16 op 	env->nserver = env->prefork_gotwebd;
372 26678add 2023-11-16 op 	env->iev_server = calloc(env->nserver, sizeof(*env->iev_server));
373 26678add 2023-11-16 op 	if (env->iev_server == NULL)
374 26678add 2023-11-16 op 		fatal("calloc");
375 a596b957 2022-07-14 tracey 
376 26678add 2023-11-16 op 	for (i = 0; i < env->nserver; ++i) {
377 26678add 2023-11-16 op 		if (spawn_socket_process(env, argv0, i) == -1)
378 26678add 2023-11-16 op 			fatal("spawn_socket_process");
379 26678add 2023-11-16 op 	}
380 a596b957 2022-07-14 tracey 
381 4056db63 2023-11-16 op 	if (chdir("/") == -1)
382 4056db63 2023-11-16 op 		fatal("chdir /");
383 4056db63 2023-11-16 op 
384 26678add 2023-11-16 op 	log_procinit("gotwebd");
385 a596b957 2022-07-14 tracey 
386 26678add 2023-11-16 op 	log_info("%s startup", getprogname());
387 26678add 2023-11-16 op 
388 26678add 2023-11-16 op 	signal_set(&sigint, SIGINT, gotwebd_sighdlr, env);
389 26678add 2023-11-16 op 	signal_set(&sigterm, SIGTERM, gotwebd_sighdlr, env);
390 26678add 2023-11-16 op 	signal_set(&sighup, SIGHUP, gotwebd_sighdlr, env);
391 26678add 2023-11-16 op 	signal_set(&sigpipe, SIGPIPE, gotwebd_sighdlr, env);
392 26678add 2023-11-16 op 	signal_set(&sigusr1, SIGUSR1, gotwebd_sighdlr, env);
393 26678add 2023-11-16 op 
394 26678add 2023-11-16 op 	signal_add(&sigint, NULL);
395 26678add 2023-11-16 op 	signal_add(&sigterm, NULL);
396 26678add 2023-11-16 op 	signal_add(&sighup, NULL);
397 26678add 2023-11-16 op 	signal_add(&sigpipe, NULL);
398 26678add 2023-11-16 op 	signal_add(&sigusr1, NULL);
399 26678add 2023-11-16 op 
400 a596b957 2022-07-14 tracey 	if (gotwebd_configure(env) == -1)
401 a596b957 2022-07-14 tracey 		fatalx("configuration failed");
402 a596b957 2022-07-14 tracey 
403 a596b957 2022-07-14 tracey #ifdef PROFILE
404 a596b957 2022-07-14 tracey 	if (unveil("gmon.out", "rwc") != 0)
405 a596b957 2022-07-14 tracey 		err(1, "gmon.out");
406 a596b957 2022-07-14 tracey #endif
407 a596b957 2022-07-14 tracey 
408 6fe3b58a 2023-11-14 stsp 	if (unveil(env->httpd_chroot, "r") == -1)
409 a596b957 2022-07-14 tracey 		err(1, "unveil");
410 a596b957 2022-07-14 tracey 
411 a596b957 2022-07-14 tracey 	if (unveil(GOTWEBD_CONF, "r") == -1)
412 a596b957 2022-07-14 tracey 		err(1, "unveil");
413 a596b957 2022-07-14 tracey 
414 a596b957 2022-07-14 tracey 	if (unveil(NULL, NULL) != 0)
415 a596b957 2022-07-14 tracey 		err(1, "unveil");
416 a596b957 2022-07-14 tracey 
417 a596b957 2022-07-14 tracey #ifndef PROFILE
418 63c6b10f 2023-11-14 stsp 	if (pledge("stdio", NULL) == -1)
419 a596b957 2022-07-14 tracey 		err(1, "pledge");
420 a596b957 2022-07-14 tracey #endif
421 a596b957 2022-07-14 tracey 
422 a596b957 2022-07-14 tracey 	event_dispatch();
423 a596b957 2022-07-14 tracey 
424 a596b957 2022-07-14 tracey 	log_debug("%s gotwebd exiting", getprogname());
425 a596b957 2022-07-14 tracey 
426 a596b957 2022-07-14 tracey 	return (0);
427 a596b957 2022-07-14 tracey }
428 a596b957 2022-07-14 tracey 
429 a596b957 2022-07-14 tracey int
430 a596b957 2022-07-14 tracey gotwebd_configure(struct gotwebd *env)
431 a596b957 2022-07-14 tracey {
432 a596b957 2022-07-14 tracey 	struct server *srv;
433 a596b957 2022-07-14 tracey 	struct socket *sock;
434 a596b957 2022-07-14 tracey 
435 a596b957 2022-07-14 tracey 	/* gotweb need to reload its config. */
436 a596b957 2022-07-14 tracey 	env->gotwebd_reload = env->prefork_gotwebd;
437 a596b957 2022-07-14 tracey 
438 a596b957 2022-07-14 tracey 	/* send our gotweb servers */
439 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH(srv, &env->servers, entry) {
440 a596b957 2022-07-14 tracey 		if (config_setserver(env, srv) == -1)
441 a596b957 2022-07-14 tracey 			fatalx("%s: send server error", __func__);
442 a596b957 2022-07-14 tracey 	}
443 a596b957 2022-07-14 tracey 
444 a596b957 2022-07-14 tracey 	/* send our sockets */
445 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH(sock, &env->sockets, entry) {
446 a596b957 2022-07-14 tracey 		if (config_setsock(env, sock) == -1)
447 a596b957 2022-07-14 tracey 			fatalx("%s: send socket error", __func__);
448 a596b957 2022-07-14 tracey 	}
449 2a83fef7 2024-05-27 op 
450 2a83fef7 2024-05-27 op 	/* send the temp files */
451 2a83fef7 2024-05-27 op 	if (config_setfd(env) == -1)
452 2a83fef7 2024-05-27 op 		fatalx("%s: send priv_fd error", __func__);
453 a596b957 2022-07-14 tracey 
454 26678add 2023-11-16 op 	if (main_compose_sockets(env, IMSG_CFG_DONE, -1, NULL, 0) == -1)
455 26678add 2023-11-16 op 		fatal("main_compose_sockets IMSG_CFG_DONE");
456 a596b957 2022-07-14 tracey 
457 a596b957 2022-07-14 tracey 	return (0);
458 a596b957 2022-07-14 tracey }
459 a596b957 2022-07-14 tracey 
460 a596b957 2022-07-14 tracey void
461 a596b957 2022-07-14 tracey gotwebd_configure_done(struct gotwebd *env)
462 a596b957 2022-07-14 tracey {
463 a596b957 2022-07-14 tracey 	if (env->gotwebd_reload == 0) {
464 a596b957 2022-07-14 tracey 		log_warnx("%s: configuration already finished", __func__);
465 a596b957 2022-07-14 tracey 		return;
466 a596b957 2022-07-14 tracey 	}
467 a596b957 2022-07-14 tracey 
468 a596b957 2022-07-14 tracey 	env->gotwebd_reload--;
469 26678add 2023-11-16 op 	if (env->gotwebd_reload == 0 &&
470 26678add 2023-11-16 op 	    main_compose_sockets(env, IMSG_CTL_START, -1, NULL, 0) == -1)
471 26678add 2023-11-16 op 		fatal("main_compose_sockets IMSG_CTL_START");
472 a596b957 2022-07-14 tracey }
473 a596b957 2022-07-14 tracey 
474 a596b957 2022-07-14 tracey void
475 a596b957 2022-07-14 tracey gotwebd_shutdown(void)
476 a596b957 2022-07-14 tracey {
477 26678add 2023-11-16 op 	struct gotwebd	*env = gotwebd_env;
478 26678add 2023-11-16 op 	pid_t		 pid;
479 26678add 2023-11-16 op 	int		 i, status;
480 a596b957 2022-07-14 tracey 
481 26678add 2023-11-16 op 	for (i = 0; i < env->nserver; ++i) {
482 26678add 2023-11-16 op 		event_del(&env->iev_server[i].ev);
483 26678add 2023-11-16 op 		imsg_clear(&env->iev_server[i].ibuf);
484 26678add 2023-11-16 op 		close(env->iev_server[i].ibuf.fd);
485 26678add 2023-11-16 op 		env->iev_server[i].ibuf.fd = -1;
486 26678add 2023-11-16 op 	}
487 26678add 2023-11-16 op 
488 26678add 2023-11-16 op 	do {
489 26678add 2023-11-16 op 		pid = waitpid(WAIT_ANY, &status, 0);
490 26678add 2023-11-16 op 		if (pid <= 0)
491 26678add 2023-11-16 op 			continue;
492 26678add 2023-11-16 op 
493 26678add 2023-11-16 op 		if (WIFSIGNALED(status))
494 26678add 2023-11-16 op 			log_warnx("lost child: pid %u terminated; signal %d",
495 26678add 2023-11-16 op 			    pid, WTERMSIG(status));
496 26678add 2023-11-16 op 		else if (WIFEXITED(status) && WEXITSTATUS(status) != 0)
497 26678add 2023-11-16 op 			log_warnx("lost child: pid %u exited abnormally",
498 26678add 2023-11-16 op 			    pid);
499 26678add 2023-11-16 op 	} while (pid != -1 || (pid == -1 && errno == EINTR));
500 26678add 2023-11-16 op 
501 a596b957 2022-07-14 tracey 	free(gotwebd_env);
502 a596b957 2022-07-14 tracey 
503 a596b957 2022-07-14 tracey 	log_warnx("gotwebd terminating");
504 a596b957 2022-07-14 tracey 	exit(0);
505 a596b957 2022-07-14 tracey }