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Date:: Wed Mar 3 17:22:01 2021 UTC
Message:: give each server process its own socket for the executor this fixes a bug introduced with the prefork mechanics: every server process shared the same socket, and this would cause a race condition when multiple server processes asked for a script cgi being executed. This gives each server process its own socket to talk to the executor, so the race cannot happen.
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  1 3e4749f7 2020-10-02 op /*
  2 3e4749f7 2020-10-02 op  * Copyright (c) 2020 Omar Polo <op@omarpolo.com>
  3 3e4749f7 2020-10-02 op  *
  4 3e4749f7 2020-10-02 op  * Permission to use, copy, modify, and distribute this software for any
  5 3e4749f7 2020-10-02 op  * purpose with or without fee is hereby granted, provided that the above
  6 3e4749f7 2020-10-02 op  * copyright notice and this permission notice appear in all copies.
  7 3e4749f7 2020-10-02 op  *
  8 3e4749f7 2020-10-02 op  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 3e4749f7 2020-10-02 op  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 3e4749f7 2020-10-02 op  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 3e4749f7 2020-10-02 op  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 3e4749f7 2020-10-02 op  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 3e4749f7 2020-10-02 op  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 3e4749f7 2020-10-02 op  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 3e4749f7 2020-10-02 op  */
 16 52418c8d 2021-02-12 op 
 17 52418c8d 2021-02-12 op #include "gmid.h"
 18 3e4749f7 2020-10-02 op 
 19 8443bff7 2021-01-25 op #include <sys/stat.h>
 20 8443bff7 2021-01-25 op 
 21 592fd624 2020-10-07 op #include <errno.h>
 22 3e4749f7 2020-10-02 op #include <fcntl.h>
 23 bcf5d929 2021-02-01 op #include <limits.h>
 24 ae08ec7d 2021-01-25 op #include <pwd.h>
 25 0cf902af 2020-11-03 op #include <signal.h>
 26 3e4749f7 2020-10-02 op #include <string.h>
 27 cc68fe70 2020-10-07 op 
 28 ca21e100 2021-02-04 op volatile sig_atomic_t hupped;
 29 ca21e100 2021-02-04 op 
 30 15902770 2021-01-15 op struct vhost hosts[HOSTSLEN];
 31 15902770 2021-01-15 op 
 32 2c3e53da 2021-03-03 op int exfd, logfd, sock4, sock6, servpipes[PROC_MAX];
 33 d672b8fb 2021-02-03 op 
 34 376a5407 2021-02-23 op struct imsgbuf logpibuf, logcibuf;
 35 376a5407 2021-02-23 op 
 36 d672b8fb 2021-02-03 op const char *config_path, *certs_dir, *hostname;
 37 881a9dd9 2021-01-16 op 
 38 15902770 2021-01-15 op struct conf conf;
 39 15902770 2021-01-15 op 
 40 ca21e100 2021-02-04 op struct tls_config *tlsconf;
 41 ae08ec7d 2021-01-25 op struct tls *ctx;
 42 0be51733 2021-01-20 op 
 43 120381c9 2020-11-06 op void
 44 4a28dd01 2020-12-28 op sig_handler(int sig)
 45 120381c9 2020-11-06 op {
 46 120381c9 2020-11-06 op 	(void)sig;
 47 ca21e100 2021-02-04 op 
 48 ca21e100 2021-02-04 op 	hupped = sig == SIGHUP;
 49 72f653b6 2020-11-06 op }
 50 72f653b6 2020-11-06 op 
 51 8443bff7 2021-01-25 op /* XXX: create recursively */
 52 8443bff7 2021-01-25 op void
 53 8443bff7 2021-01-25 op mkdirs(const char *path)
 54 8443bff7 2021-01-25 op {
 55 8443bff7 2021-01-25 op 	if (mkdir(path, 0755) == -1 && errno != EEXIST)
 56 8443bff7 2021-01-25 op 		fatal("can't mkdir %s: %s", path, strerror(errno));
 57 8443bff7 2021-01-25 op }
 58 8443bff7 2021-01-25 op 
 59 8443bff7 2021-01-25 op /* $XDG_DATA_HOME/gmid */
 60 8443bff7 2021-01-25 op char *
 61 8443bff7 2021-01-25 op data_dir(void)
 62 8443bff7 2021-01-25 op {
 63 8443bff7 2021-01-25 op 	const char *home, *xdg;
 64 8443bff7 2021-01-25 op 	char *t;
 65 8443bff7 2021-01-25 op 
 66 8443bff7 2021-01-25 op 	if ((xdg = getenv("XDG_DATA_HOME")) == NULL) {
 67 8443bff7 2021-01-25 op 		if ((home = getenv("HOME")) == NULL)
 68 8443bff7 2021-01-25 op 			errx(1, "XDG_DATA_HOME and HOME both empty");
 69 8443bff7 2021-01-25 op 		if (asprintf(&t, "%s/.local/share/gmid", home) == -1)
 70 8443bff7 2021-01-25 op 			err(1, "asprintf");
 71 8443bff7 2021-01-25 op 		mkdirs(t);
 72 8443bff7 2021-01-25 op 		return t;
 73 8443bff7 2021-01-25 op 	}
 74 8443bff7 2021-01-25 op 
 75 8443bff7 2021-01-25 op 	if (asprintf(&t, "%s/gmid", xdg) == -1)
 76 8443bff7 2021-01-25 op 		err(1, "asprintf");
 77 8443bff7 2021-01-25 op 	mkdirs(t);
 78 8443bff7 2021-01-25 op 	return t;
 79 d3a08f4d 2021-01-17 op }
 80 a5d310bc 2020-11-10 op 
 81 d3a08f4d 2021-01-17 op void
 82 8443bff7 2021-01-25 op load_local_cert(const char *hostname, const char *dir)
 83 8443bff7 2021-01-25 op {
 84 8443bff7 2021-01-25 op 	char *cert, *key;
 85 8443bff7 2021-01-25 op 
 86 8443bff7 2021-01-25 op 	if (asprintf(&cert, "%s/%s.cert.pem", dir, hostname) == -1)
 87 8443bff7 2021-01-25 op 		errx(1, "asprintf");
 88 8443bff7 2021-01-25 op 	if (asprintf(&key, "%s/%s.key.pem", dir, hostname) == -1)
 89 8443bff7 2021-01-25 op 		errx(1, "asprintf");
 90 8443bff7 2021-01-25 op 
 91 8443bff7 2021-01-25 op 	if (access(cert, R_OK) == -1 || access(key, R_OK) == -1)
 92 8443bff7 2021-01-25 op 		gen_certificate(hostname, cert, key);
 93 8443bff7 2021-01-25 op 
 94 8443bff7 2021-01-25 op 	hosts[0].cert = cert;
 95 8443bff7 2021-01-25 op 	hosts[0].key = key;
 96 8443bff7 2021-01-25 op 	hosts[0].domain = hostname;
 97 8443bff7 2021-01-25 op }
 98 8443bff7 2021-01-25 op 
 99 8443bff7 2021-01-25 op void
100 ae08ec7d 2021-01-25 op load_vhosts(void)
101 3e4749f7 2020-10-02 op {
102 15902770 2021-01-15 op 	struct vhost *h;
103 15902770 2021-01-15 op 
104 15902770 2021-01-15 op 	for (h = hosts; h->domain != NULL; ++h) {
105 d3a08f4d 2021-01-17 op 		if ((h->dirfd = open(h->dir, O_RDONLY | O_DIRECTORY)) == -1)
106 132cae8c 2021-01-18 op 			fatal("open %s for domain %s", h->dir, h->domain);
107 9862b637 2021-01-13 op 	}
108 9862b637 2021-01-13 op }
109 592fd624 2020-10-07 op 
110 3e4749f7 2020-10-02 op int
111 9468027b 2020-10-15 op make_socket(int port, int family)
112 3e4749f7 2020-10-02 op {
113 3e4749f7 2020-10-02 op 	int sock, v;
114 9468027b 2020-10-15 op 	struct sockaddr_in addr4;
115 9468027b 2020-10-15 op 	struct sockaddr_in6 addr6;
116 9468027b 2020-10-15 op 	struct sockaddr *addr;
117 9468027b 2020-10-15 op 	socklen_t len;
118 3e4749f7 2020-10-02 op 
119 9468027b 2020-10-15 op         switch (family) {
120 9468027b 2020-10-15 op 	case AF_INET:
121 9468027b 2020-10-15 op 		bzero(&addr4, sizeof(addr4));
122 9468027b 2020-10-15 op 		addr4.sin_family = family;
123 9468027b 2020-10-15 op 		addr4.sin_port = htons(port);
124 9468027b 2020-10-15 op 		addr4.sin_addr.s_addr = INADDR_ANY;
125 9468027b 2020-10-15 op 		addr = (struct sockaddr*)&addr4;
126 9468027b 2020-10-15 op 		len = sizeof(addr4);
127 9468027b 2020-10-15 op 		break;
128 9468027b 2020-10-15 op 
129 9468027b 2020-10-15 op 	case AF_INET6:
130 9468027b 2020-10-15 op 		bzero(&addr6, sizeof(addr6));
131 9468027b 2020-10-15 op 		addr6.sin6_family = AF_INET6;
132 9468027b 2020-10-15 op 		addr6.sin6_port = htons(port);
133 9468027b 2020-10-15 op 		addr6.sin6_addr = in6addr_any;
134 9468027b 2020-10-15 op 		addr = (struct sockaddr*)&addr6;
135 9468027b 2020-10-15 op 		len = sizeof(addr6);
136 9468027b 2020-10-15 op 		break;
137 9468027b 2020-10-15 op 
138 9468027b 2020-10-15 op 	default:
139 9468027b 2020-10-15 op 		/* unreachable */
140 9468027b 2020-10-15 op 		abort();
141 9468027b 2020-10-15 op 	}
142 9468027b 2020-10-15 op 
143 9468027b 2020-10-15 op 	if ((sock = socket(family, SOCK_STREAM, 0)) == -1)
144 80bbcad5 2021-01-10 op 		fatal("socket: %s", strerror(errno));
145 3e4749f7 2020-10-02 op 
146 3e4749f7 2020-10-02 op 	v = 1;
147 3e4749f7 2020-10-02 op 	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &v, sizeof(v)) == -1)
148 80bbcad5 2021-01-10 op 		fatal("setsockopt(SO_REUSEADDR): %s", strerror(errno));
149 3e4749f7 2020-10-02 op 
150 3e4749f7 2020-10-02 op 	v = 1;
151 3e4749f7 2020-10-02 op 	if (setsockopt(sock, SOL_SOCKET, SO_REUSEPORT, &v, sizeof(v)) == -1)
152 80bbcad5 2021-01-10 op 		fatal("setsockopt(SO_REUSEPORT): %s", strerror(errno));
153 3e4749f7 2020-10-02 op 
154 592fd624 2020-10-07 op 	mark_nonblock(sock);
155 592fd624 2020-10-07 op 
156 9468027b 2020-10-15 op 	if (bind(sock, addr, len) == -1)
157 80bbcad5 2021-01-10 op 		fatal("bind: %s", strerror(errno));
158 3e4749f7 2020-10-02 op 
159 3e4749f7 2020-10-02 op 	if (listen(sock, 16) == -1)
160 80bbcad5 2021-01-10 op 		fatal("listen: %s", strerror(errno));
161 3e4749f7 2020-10-02 op 
162 3e4749f7 2020-10-02 op 	return sock;
163 3e4749f7 2020-10-02 op }
164 3e4749f7 2020-10-02 op 
165 ae08ec7d 2021-01-25 op void
166 ae08ec7d 2021-01-25 op setup_tls(void)
167 881a9dd9 2021-01-16 op {
168 ae08ec7d 2021-01-25 op 	struct vhost *h;
169 881a9dd9 2021-01-16 op 
170 881a9dd9 2021-01-16 op 	if ((tlsconf = tls_config_new()) == NULL)
171 132cae8c 2021-01-18 op 		fatal("tls_config_new");
172 881a9dd9 2021-01-16 op 
173 881a9dd9 2021-01-16 op 	/* optionally accept client certs, but don't try to verify them */
174 881a9dd9 2021-01-16 op 	tls_config_verify_client_optional(tlsconf);
175 881a9dd9 2021-01-16 op 	tls_config_insecure_noverifycert(tlsconf);
176 881a9dd9 2021-01-16 op 
177 881a9dd9 2021-01-16 op 	if (tls_config_set_protocols(tlsconf, conf.protos) == -1)
178 132cae8c 2021-01-18 op 		fatal("tls_config_set_protocols");
179 881a9dd9 2021-01-16 op 
180 881a9dd9 2021-01-16 op 	if ((ctx = tls_server()) == NULL)
181 132cae8c 2021-01-18 op 		fatal("tls_server failure");
182 881a9dd9 2021-01-16 op 
183 ae08ec7d 2021-01-25 op 	/* we need to set something, then we can add how many key we want */
184 ae08ec7d 2021-01-25 op 	if (tls_config_set_keypair_file(tlsconf, hosts->cert, hosts->key))
185 ca21e100 2021-02-04 op 		fatal("tls_config_set_keypair_file failed for (%s, %s)",
186 ca21e100 2021-02-04 op 		    hosts->cert, hosts->key);
187 881a9dd9 2021-01-16 op 
188 8443bff7 2021-01-25 op 	for (h = &hosts[1]; h->domain != NULL; ++h) {
189 ae08ec7d 2021-01-25 op 		if (tls_config_add_keypair_file(tlsconf, h->cert, h->key) == -1)
190 ae08ec7d 2021-01-25 op 			fatal("failed to load the keypair (%s, %s)",
191 ae08ec7d 2021-01-25 op 			    h->cert, h->key);
192 ae08ec7d 2021-01-25 op 	}
193 ae08ec7d 2021-01-25 op 
194 881a9dd9 2021-01-16 op 	if (tls_configure(ctx, tlsconf) == -1)
195 132cae8c 2021-01-18 op 		fatal("tls_configure: %s", tls_error(ctx));
196 ae08ec7d 2021-01-25 op }
197 881a9dd9 2021-01-16 op 
198 d672b8fb 2021-02-03 op static int
199 ae08ec7d 2021-01-25 op listener_main(void)
200 ae08ec7d 2021-01-25 op {
201 a709ddf5 2021-02-07 op 	drop_priv();
202 a709ddf5 2021-02-07 op 	unblock_signals();
203 ae08ec7d 2021-01-25 op 	load_default_mime(&conf.mime);
204 ae08ec7d 2021-01-25 op 	load_vhosts();
205 881a9dd9 2021-01-16 op 	loop(ctx, sock4, sock6);
206 881a9dd9 2021-01-16 op 	return 0;
207 3e4749f7 2020-10-02 op }
208 3e4749f7 2020-10-02 op 
209 8d6ae384 2021-01-24 op void
210 8d6ae384 2021-01-24 op init_config(void)
211 3e4749f7 2020-10-02 op {
212 15902770 2021-01-15 op 	size_t i;
213 120381c9 2020-11-06 op 
214 15902770 2021-01-15 op 	bzero(hosts, sizeof(hosts));
215 15902770 2021-01-15 op 	for (i = 0; i < HOSTSLEN; ++i)
216 15902770 2021-01-15 op 		hosts[i].dirfd = -1;
217 51d876f0 2020-12-21 op 
218 15902770 2021-01-15 op 	conf.port = 1965;
219 15902770 2021-01-15 op 	conf.ipv6 = 0;
220 5bc3c98e 2021-01-15 op 	conf.protos = TLS_PROTOCOL_TLSv1_2 | TLS_PROTOCOL_TLSv1_3;
221 85dff1f9 2021-01-11 op 
222 b2a6b613 2021-01-21 op 	init_mime(&conf.mime);
223 ae08ec7d 2021-01-25 op 
224 ae08ec7d 2021-01-25 op 	conf.chroot = NULL;
225 ae08ec7d 2021-01-25 op 	conf.user = NULL;
226 a709ddf5 2021-02-07 op 
227 a709ddf5 2021-02-07 op 	/* we'll change this to 0 when running without config. */
228 a709ddf5 2021-02-07 op 	conf.prefork = 3;
229 8d6ae384 2021-01-24 op }
230 0fbe79b3 2021-01-18 op 
231 2030e314 2021-01-25 op void
232 ca21e100 2021-02-04 op free_config(void)
233 ca21e100 2021-02-04 op {
234 ca21e100 2021-02-04 op 	struct vhost *h;
235 ca21e100 2021-02-04 op 	struct location *l;
236 ca21e100 2021-02-04 op 
237 ca21e100 2021-02-04 op 	free(conf.chroot);
238 ca21e100 2021-02-04 op 	free(conf.user);
239 ca21e100 2021-02-04 op 	memset(&conf, 0, sizeof(conf));
240 ca21e100 2021-02-04 op 
241 ca21e100 2021-02-04 op 	for (h = hosts; h->domain != NULL; ++h) {
242 ca21e100 2021-02-04 op 		free((char*)h->domain);
243 ca21e100 2021-02-04 op 		free((char*)h->cert);
244 ca21e100 2021-02-04 op 		free((char*)h->key);
245 ca21e100 2021-02-04 op 		free((char*)h->dir);
246 ca21e100 2021-02-04 op 		free((char*)h->cgi);
247 e3ddf390 2021-02-06 op 		free((char*)h->entrypoint);
248 ca21e100 2021-02-04 op 
249 ca21e100 2021-02-04 op 		for (l = h->locations; l->match != NULL; ++l) {
250 ca21e100 2021-02-04 op 			free((char*)l->match);
251 ca21e100 2021-02-04 op 			free((char*)l->lang);
252 ca21e100 2021-02-04 op 			free((char*)l->default_mime);
253 ca21e100 2021-02-04 op 			free((char*)l->index);
254 6abda252 2021-02-06 op 			free((char*)l->block_fmt);
255 ca21e100 2021-02-04 op 		}
256 ca21e100 2021-02-04 op 	}
257 ca21e100 2021-02-04 op 	memset(hosts, 0, sizeof(hosts));
258 ca21e100 2021-02-04 op 
259 ca21e100 2021-02-04 op 	tls_free(ctx);
260 ca21e100 2021-02-04 op 	tls_config_free(tlsconf);
261 ca21e100 2021-02-04 op }
262 ca21e100 2021-02-04 op 
263 ca21e100 2021-02-04 op static void
264 ca21e100 2021-02-04 op wait_sighup(void)
265 ca21e100 2021-02-04 op {
266 ca21e100 2021-02-04 op 	sigset_t mask;
267 ca21e100 2021-02-04 op 	int signo;
268 ca21e100 2021-02-04 op 
269 ca21e100 2021-02-04 op 	sigemptyset(&mask);
270 ca21e100 2021-02-04 op 	sigaddset(&mask, SIGHUP);
271 ca21e100 2021-02-04 op 	sigwait(&mask, &signo);
272 ca21e100 2021-02-04 op }
273 ca21e100 2021-02-04 op 
274 ca21e100 2021-02-04 op void
275 ae08ec7d 2021-01-25 op drop_priv(void)
276 ae08ec7d 2021-01-25 op {
277 ae08ec7d 2021-01-25 op 	struct passwd *pw = NULL;
278 ae08ec7d 2021-01-25 op 
279 ae08ec7d 2021-01-25 op 	if (conf.chroot != NULL && conf.user == NULL)
280 ae08ec7d 2021-01-25 op 		fatal("can't chroot without an user to switch to after.");
281 ae08ec7d 2021-01-25 op 
282 ae08ec7d 2021-01-25 op 	if (conf.user != NULL) {
283 ae08ec7d 2021-01-25 op 		if ((pw = getpwnam(conf.user)) == NULL)
284 ae08ec7d 2021-01-25 op 			fatal("can't find user %s", conf.user);
285 ae08ec7d 2021-01-25 op 	}
286 ae08ec7d 2021-01-25 op 
287 ae08ec7d 2021-01-25 op 	if (conf.chroot != NULL) {
288 ae08ec7d 2021-01-25 op 		if (chroot(conf.chroot) != 0 || chdir("/") != 0)
289 ae08ec7d 2021-01-25 op 			fatal("%s: %s", conf.chroot, strerror(errno));
290 ae08ec7d 2021-01-25 op 	}
291 ae08ec7d 2021-01-25 op 
292 ae08ec7d 2021-01-25 op 	if (pw != NULL) {
293 ae08ec7d 2021-01-25 op 		if (setresuid(pw->pw_uid, pw->pw_uid, pw->pw_uid) == -1)
294 ae08ec7d 2021-01-25 op 			fatal("setresuid(%d): %s", pw->pw_uid,
295 ae08ec7d 2021-01-25 op 			    strerror(errno));
296 ae08ec7d 2021-01-25 op 	}
297 ae08ec7d 2021-01-25 op 
298 ae08ec7d 2021-01-25 op 	if (getuid() == 0)
299 3abf91b0 2021-02-07 op 		log_warn(NULL, "not a good idea to run a network daemon as root");
300 2030e314 2021-01-25 op }
301 d672b8fb 2021-02-03 op 
302 3abf91b0 2021-02-07 op static void
303 3abf91b0 2021-02-07 op usage(const char *me)
304 3abf91b0 2021-02-07 op {
305 3abf91b0 2021-02-07 op 	fprintf(stderr,
306 3abf91b0 2021-02-07 op 	    "USAGE: %s [-fn] [-c config] | [-6h] [-d certs-dir] [-H host]"
307 aa372875 2021-02-10 op 	    "       [-p port] [-x cgi] [dir]\n",
308 3abf91b0 2021-02-07 op 	    me);
309 3abf91b0 2021-02-07 op }
310 3abf91b0 2021-02-07 op 
311 376a5407 2021-02-23 op static void
312 376a5407 2021-02-23 op logger_init(void)
313 376a5407 2021-02-23 op {
314 376a5407 2021-02-23 op 	int p[2];
315 376a5407 2021-02-23 op 
316 376a5407 2021-02-23 op 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, p) == -1)
317 376a5407 2021-02-23 op 		err(1, "socketpair");
318 376a5407 2021-02-23 op 
319 376a5407 2021-02-23 op 	switch (fork()) {
320 376a5407 2021-02-23 op 	case -1:
321 376a5407 2021-02-23 op 		err(1, "fork");
322 376a5407 2021-02-23 op 	case 0:
323 376a5407 2021-02-23 op 		logfd = p[1];
324 376a5407 2021-02-23 op 		close(p[0]);
325 376a5407 2021-02-23 op 		setproctitle("logger");
326 376a5407 2021-02-23 op 		imsg_init(&logcibuf, p[1]);
327 376a5407 2021-02-23 op 		drop_priv();
328 376a5407 2021-02-23 op 		_exit(logger_main(p[1], &logcibuf));
329 376a5407 2021-02-23 op 	default:
330 376a5407 2021-02-23 op 		logfd = p[0];
331 376a5407 2021-02-23 op 		close(p[1]);
332 376a5407 2021-02-23 op 		imsg_init(&logpibuf, p[0]);
333 376a5407 2021-02-23 op 		return;
334 376a5407 2021-02-23 op 	}
335 376a5407 2021-02-23 op }
336 376a5407 2021-02-23 op 
337 d672b8fb 2021-02-03 op static int
338 2c3e53da 2021-03-03 op serve(int argc, char **argv)
339 d672b8fb 2021-02-03 op {
340 2c3e53da 2021-03-03 op 	char	path[PATH_MAX];
341 2c3e53da 2021-03-03 op 	int	i, p[2];
342 d672b8fb 2021-02-03 op 
343 2c3e53da 2021-03-03 op         if (config_path == NULL) {
344 d672b8fb 2021-02-03 op 		if (hostname == NULL)
345 d672b8fb 2021-02-03 op 			hostname = "localhost";
346 d672b8fb 2021-02-03 op 		if (certs_dir == NULL)
347 d672b8fb 2021-02-03 op 			certs_dir = data_dir();
348 d672b8fb 2021-02-03 op 		load_local_cert(hostname, certs_dir);
349 d672b8fb 2021-02-03 op 
350 d672b8fb 2021-02-03 op 		hosts[0].domain = "*";
351 d672b8fb 2021-02-03 op 		hosts[0].locations[0].auto_index = 1;
352 d672b8fb 2021-02-03 op 		hosts[0].locations[0].match = "*";
353 d672b8fb 2021-02-03 op 
354 d672b8fb 2021-02-03 op 		switch (argc) {
355 d672b8fb 2021-02-03 op 		case 0:
356 d672b8fb 2021-02-03 op 			hosts[0].dir = getcwd(path, sizeof(path));
357 d672b8fb 2021-02-03 op 			break;
358 d672b8fb 2021-02-03 op 		case 1:
359 d672b8fb 2021-02-03 op 			hosts[0].dir = absolutify_path(argv[0]);
360 d672b8fb 2021-02-03 op 			break;
361 d672b8fb 2021-02-03 op 		default:
362 d672b8fb 2021-02-03 op 			usage(getprogname());
363 d672b8fb 2021-02-03 op 			return 1;
364 d672b8fb 2021-02-03 op 		}
365 2030e314 2021-01-25 op 
366 3abf91b0 2021-02-07 op 		log_notice(NULL, "serving %s on port %d", hosts[0].dir, conf.port);
367 d672b8fb 2021-02-03 op 	}
368 d672b8fb 2021-02-03 op 
369 d672b8fb 2021-02-03 op 	/* setup tls before dropping privileges: we don't want user
370 d672b8fb 2021-02-03 op 	 * to put private certs inside the chroot. */
371 d672b8fb 2021-02-03 op 	setup_tls();
372 d672b8fb 2021-02-03 op 
373 2c3e53da 2021-03-03 op 	for (i = 0; i < conf.prefork; ++i) {
374 2c3e53da 2021-03-03 op 		if (socketpair(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC,
375 2c3e53da 2021-03-03 op 		    PF_UNSPEC, p) == -1)
376 2c3e53da 2021-03-03 op 			fatal("socketpair: %s", strerror(errno));
377 d672b8fb 2021-02-03 op 
378 2c3e53da 2021-03-03 op 		switch (fork()) {
379 2c3e53da 2021-03-03 op 		case -1:
380 2c3e53da 2021-03-03 op 			fatal("fork: %s", strerror(errno));
381 2c3e53da 2021-03-03 op 		case 0:		/* child */
382 2c3e53da 2021-03-03 op 			close(p[0]);
383 2c3e53da 2021-03-03 op 			exfd = p[1];
384 2c3e53da 2021-03-03 op 			setproctitle("server");
385 2c3e53da 2021-03-03 op 			_exit(listener_main());
386 2c3e53da 2021-03-03 op 		default:
387 2c3e53da 2021-03-03 op 			servpipes[i] = p[0];
388 2c3e53da 2021-03-03 op 			close(p[1]);
389 2c3e53da 2021-03-03 op 		}
390 d672b8fb 2021-02-03 op 	}
391 2c3e53da 2021-03-03 op 
392 2c3e53da 2021-03-03 op 	setproctitle("executor");
393 2c3e53da 2021-03-03 op 	drop_priv();
394 2c3e53da 2021-03-03 op 	unblock_signals();
395 2c3e53da 2021-03-03 op 	_exit(executor_main());
396 d672b8fb 2021-02-03 op }
397 d672b8fb 2021-02-03 op 
398 8d6ae384 2021-01-24 op int
399 8d6ae384 2021-01-24 op main(int argc, char **argv)
400 8d6ae384 2021-01-24 op {
401 2c3e53da 2021-03-03 op 	int ch, conftest = 0, configless = 0;
402 ca21e100 2021-02-04 op 	int old_ipv6, old_port;
403 501e489c 2021-01-24 op 
404 501e489c 2021-01-24 op 	init_config();
405 8d6ae384 2021-01-24 op 
406 8904fa0e 2021-01-27 op 	while ((ch = getopt(argc, argv, "6c:d:fH:hnp:vx:")) != -1) {
407 3e4749f7 2020-10-02 op 		switch (ch) {
408 85dff1f9 2021-01-11 op 		case '6':
409 15902770 2021-01-15 op 			conf.ipv6 = 1;
410 8443bff7 2021-01-25 op 			configless = 1;
411 85dff1f9 2021-01-11 op 			break;
412 85dff1f9 2021-01-11 op 
413 3e4749f7 2020-10-02 op 		case 'c':
414 ca21e100 2021-02-04 op 			config_path = absolutify_path(optarg);
415 3e4749f7 2020-10-02 op 			break;
416 3e4749f7 2020-10-02 op 
417 3e4749f7 2020-10-02 op 		case 'd':
418 8443bff7 2021-01-25 op 			certs_dir = optarg;
419 8443bff7 2021-01-25 op 			configless = 1;
420 3e4749f7 2020-10-02 op 			break;
421 3e4749f7 2020-10-02 op 
422 46af8c6c 2021-01-27 op 		case 'f':
423 3abf91b0 2021-02-07 op 			conf.foreground = 1;
424 46af8c6c 2021-01-27 op 			break;
425 46af8c6c 2021-01-27 op 
426 8443bff7 2021-01-25 op 		case 'H':
427 8443bff7 2021-01-25 op 			hostname = optarg;
428 8443bff7 2021-01-25 op 			configless = 1;
429 d7802bb4 2020-12-02 op 			break;
430 d7802bb4 2020-12-02 op 
431 3e4749f7 2020-10-02 op 		case 'h':
432 3e4749f7 2020-10-02 op 			usage(*argv);
433 3e4749f7 2020-10-02 op 			return 0;
434 3e4749f7 2020-10-02 op 
435 15902770 2021-01-15 op 		case 'n':
436 15902770 2021-01-15 op 			conftest = 1;
437 721e2325 2020-11-18 op 			break;
438 721e2325 2020-11-18 op 
439 15902770 2021-01-15 op 		case 'p':
440 15902770 2021-01-15 op 			conf.port = parse_portno(optarg);
441 8443bff7 2021-01-25 op 			configless = 1;
442 7146dd55 2021-01-17 op 			break;
443 15902770 2021-01-15 op 
444 8904fa0e 2021-01-27 op 		case 'v':
445 3abf91b0 2021-02-07 op 			conf.verbose++;
446 8904fa0e 2021-01-27 op 			break;
447 8904fa0e 2021-01-27 op 
448 72342dc9 2020-11-06 op 		case 'x':
449 15902770 2021-01-15 op 			/* drop the starting / (if any) */
450 15902770 2021-01-15 op 			if (*optarg == '/')
451 15902770 2021-01-15 op 				optarg++;
452 15902770 2021-01-15 op 			hosts[0].cgi = optarg;
453 8443bff7 2021-01-25 op 			configless = 1;
454 72342dc9 2020-11-06 op 			break;
455 72342dc9 2020-11-06 op 
456 3e4749f7 2020-10-02 op 		default:
457 3e4749f7 2020-10-02 op 			usage(*argv);
458 3e4749f7 2020-10-02 op 			return 1;
459 3e4749f7 2020-10-02 op 		}
460 3e4749f7 2020-10-02 op 	}
461 8443bff7 2021-01-25 op 	argc -= optind;
462 8443bff7 2021-01-25 op 	argv += optind;
463 3e4749f7 2020-10-02 op 
464 d672b8fb 2021-02-03 op 	if (config_path == NULL) {
465 72bbed91 2021-01-27 op 		configless = 1;
466 3abf91b0 2021-02-07 op 		conf.foreground = 1;
467 2c3e53da 2021-03-03 op 		conf.prefork = 1;
468 3abf91b0 2021-02-07 op 		conf.verbose++;
469 15902770 2021-01-15 op 	}
470 15902770 2021-01-15 op 
471 d672b8fb 2021-02-03 op 	if (config_path != NULL && (argc > 0 || configless))
472 d672b8fb 2021-02-03 op 		err(1, "can't specify options in config mode.");
473 d672b8fb 2021-02-03 op 
474 132cae8c 2021-01-18 op 	if (conftest) {
475 d672b8fb 2021-02-03 op 		parse_conf(config_path);
476 132cae8c 2021-01-18 op 		puts("config OK");
477 132cae8c 2021-01-18 op 		return 0;
478 132cae8c 2021-01-18 op 	}
479 15902770 2021-01-15 op 
480 4a28dd01 2020-12-28 op 	signal(SIGPIPE, SIG_IGN);
481 4a28dd01 2020-12-28 op 	signal(SIGCHLD, SIG_IGN);
482 4a28dd01 2020-12-28 op 
483 4a28dd01 2020-12-28 op #ifdef SIGINFO
484 4a28dd01 2020-12-28 op 	signal(SIGINFO, sig_handler);
485 4a28dd01 2020-12-28 op #endif
486 4a28dd01 2020-12-28 op 	signal(SIGUSR2, sig_handler);
487 ca21e100 2021-02-04 op 	signal(SIGHUP, sig_handler);
488 4a28dd01 2020-12-28 op 
489 3abf91b0 2021-02-07 op 	if (!conf.foreground && !configless) {
490 0170ba02 2021-01-17 op 		if (daemon(1, 1) == -1)
491 d278a0c3 2021-02-23 op 			err(1, "daemon");
492 0170ba02 2021-01-17 op 	}
493 4a28dd01 2020-12-28 op 
494 d672b8fb 2021-02-03 op 	if (config_path != NULL)
495 d672b8fb 2021-02-03 op 		parse_conf(config_path);
496 677afbd3 2020-12-02 op 
497 d278a0c3 2021-02-23 op 	logger_init();
498 d278a0c3 2021-02-23 op 
499 d672b8fb 2021-02-03 op 	sock4 = make_socket(conf.port, AF_INET);
500 d672b8fb 2021-02-03 op 	sock6 = -1;
501 d672b8fb 2021-02-03 op 	if (conf.ipv6)
502 d672b8fb 2021-02-03 op 		sock6 = make_socket(conf.port, AF_INET6);
503 3e4749f7 2020-10-02 op 
504 3abf91b0 2021-02-07 op 	if (configless)
505 2c3e53da 2021-03-03 op 		return serve(argc, argv);
506 ca21e100 2021-02-04 op 
507 ca21e100 2021-02-04 op 	/* wait a sighup and reload the daemon */
508 ca21e100 2021-02-04 op 	for (;;) {
509 ca21e100 2021-02-04 op 		block_signals();
510 ca21e100 2021-02-04 op 
511 ca21e100 2021-02-04 op 		hupped = 0;
512 ca21e100 2021-02-04 op 		switch (fork()) {
513 ca21e100 2021-02-04 op 		case -1:
514 ca21e100 2021-02-04 op 			fatal("fork: %s", strerror(errno));
515 ca21e100 2021-02-04 op 		case 0:
516 2c3e53da 2021-03-03 op 			return serve(argc, argv);
517 ca21e100 2021-02-04 op 		}
518 ca21e100 2021-02-04 op 
519 ca21e100 2021-02-04 op 		wait_sighup();
520 9543e3fb 2021-02-04 op 		unblock_signals();
521 3abf91b0 2021-02-07 op 		log_info(NULL, "reloading configuration %s", config_path);
522 ca21e100 2021-02-04 op 
523 ca21e100 2021-02-04 op 		old_ipv6 = conf.ipv6;
524 ca21e100 2021-02-04 op 		old_port = conf.port;
525 ca21e100 2021-02-04 op 
526 ca21e100 2021-02-04 op 		free_config();
527 ca21e100 2021-02-04 op 		init_config();
528 ca21e100 2021-02-04 op 		parse_conf(config_path);
529 ca21e100 2021-02-04 op 
530 ca21e100 2021-02-04 op 		if (old_port != conf.port) {
531 ca21e100 2021-02-04 op 			close(sock4);
532 ca21e100 2021-02-04 op 			close(sock6);
533 ca21e100 2021-02-04 op 			sock4 = -1;
534 ca21e100 2021-02-04 op 			sock6 = -1;
535 ca21e100 2021-02-04 op 		}
536 ca21e100 2021-02-04 op 
537 ca21e100 2021-02-04 op 		if (sock6 != -1 && old_ipv6 != conf.ipv6) {
538 ca21e100 2021-02-04 op 			close(sock6);
539 ca21e100 2021-02-04 op 			sock6 = -1;
540 ca21e100 2021-02-04 op 		}
541 ca21e100 2021-02-04 op 
542 ca21e100 2021-02-04 op 		if (sock4 == -1)
543 ca21e100 2021-02-04 op 			sock4 = make_socket(conf.port, AF_INET);
544 ca21e100 2021-02-04 op 		if (sock6 == -1 && conf.ipv6)
545 ca21e100 2021-02-04 op 			sock6 = make_socket(conf.port, AF_INET6);
546 ca21e100 2021-02-04 op 	}
547 3e4749f7 2020-10-02 op }