Gotweb

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Date:: Fri Jul 15 09:57:55 2022 UTC
Message:: portable: gotwebd: macos accept4 -> accept accept4() doesn't exist on MacOS, so will likely need to set fcntl() on the FD.
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1 /*
2  * Copyright (c) 2016, 2019, 2020-2021 Tracey Emery <tracey@traceyemery.net>
3  * Copyright (c) 2015 Mike Larkin <mlarkin@openbsd.org>
4  * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
5  * Copyright (c) 2013 Florian Obser <florian@openbsd.org>
6  *
7  * Permission to use, copy, modify, and distribute this software for any
8  * purpose with or without fee is hereby granted, provided that the above
9  * copyright notice and this permission notice appear in all copies.
10  *
11  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18  */
19 
20 #include <sys/param.h>
21 #include <sys/ioctl.h>
22 #include <sys/wait.h>
23 #include <sys/uio.h>
24 #include <sys/resource.h>
25 #include <sys/socket.h>
26 #include <sys/stat.h>
27 #include <sys/time.h>
28 #include <sys/types.h>
29 #include <sys/mman.h>
30 #include <sys/un.h>
31 
32 #include <net/if.h>
33 #include <netinet/in.h>
34 
35 #include <errno.h>
36 #include <event.h>
37 #include <fcntl.h>
38 #include <ifaddrs.h>
39 #include <limits.h>
40 #include <netdb.h>
41 #include <poll.h>
42 #include <pwd.h>
43 #include <stddef.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <string.h>
47 #include <unistd.h>
48 
49 #include "got_error.h"
50 #include "got_opentemp.h"
51 
52 #include "proc.h"
53 #include "gotwebd.h"
54 
55 #include "got_compat.h"
56 
57 #define SOCKS_BACKLOG 5
58 #define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))
59 
60 
61 volatile int client_cnt;
62 
63 struct timeval	timeout = { TIMEOUT_DEFAULT, 0 };
64 
65 void	 sockets_sighdlr(int, short, void *);
66 void	 sockets_run(struct privsep *, struct privsep_proc *, void *);
67 void	 sockets_launch(void);
68 void	 sockets_purge(struct gotwebd *);
69 void	 sockets_accept_paused(int, short, void *);
70 void	 sockets_dup_new_socket(struct socket *, struct socket *);
71 void	 sockets_rlimit(int);
72 
73 
74 int	 sockets_dispatch_gotwebd(int, struct privsep_proc *, struct imsg *);
75 int	 sockets_unix_socket_listen(struct privsep *, struct socket *);
76 int	 sockets_create_socket(struct addresslist *, in_port_t);
77 int	 sockets_socket_af(struct sockaddr_storage *, in_port_t);
78 int	 sockets_accept_reserve(int, struct sockaddr *, socklen_t *, int,
79 	    volatile int *);
80 
81 struct socket
82 	*sockets_conf_new_socket(struct gotwebd *, struct server *, int, int,
83 	    int);
84 
85 int cgi_inflight = 0;
86 
87 static struct privsep_proc procs[] = {
88 	{ "gotwebd",	PROC_GOTWEBD,	sockets_dispatch_gotwebd  },
89 };
90 
91 void
92 sockets(struct privsep *ps, struct privsep_proc *p)
93 {
94 	proc_run(ps, p, procs, nitems(procs), sockets_run, NULL);
95 }
96 
97 void
98 sockets_run(struct privsep *ps, struct privsep_proc *p, void *arg)
99 {
100 	if (config_init(ps->ps_env) == -1)
101 		fatal("failed to initialize configuration");
102 
103 	p->p_shutdown = sockets_shutdown;
104 
105 	sockets_rlimit(-1);
106 
107 	signal_del(&ps->ps_evsigchld);
108 	signal_set(&ps->ps_evsigchld, SIGCHLD, sockets_sighdlr, ps);
109 	signal_add(&ps->ps_evsigchld, NULL);
110 
111 #ifndef PROFILE
112 	if (pledge("stdio rpath wpath cpath inet recvfd proc exec sendfd",
113 	    NULL) == -1)
114 		fatal("pledge");
115 #endif
116 }
117 
118 void
119 sockets_parse_sockets(struct gotwebd *env)
120 {
121 	struct server *srv;
122 	struct socket *sock, *new_sock = NULL;
123 	struct address *a;
124 	int sock_id = 0, ipv4 = 0, ipv6 = 0;
125 
126 	TAILQ_FOREACH(srv, env->servers, entry) {
127 		if (srv->unix_socket) {
128 			sock_id++;
129 			new_sock = sockets_conf_new_socket(env, srv,
130 			    sock_id, UNIX, 0);
131 			TAILQ_INSERT_TAIL(env->sockets, new_sock, entry);
132 		}
133 
134 		if (srv->fcgi_socket) {
135 			sock_id++;
136 			new_sock = sockets_conf_new_socket(env, srv,
137 			    sock_id, FCGI, 0);
138 			TAILQ_INSERT_TAIL(env->sockets, new_sock, entry);
139 
140 			/* add ipv6 children */
141 			TAILQ_FOREACH(sock, env->sockets, entry) {
142 				ipv4 = ipv6 = 0;
143 
144 				TAILQ_FOREACH(a, sock->conf.al, entry) {
145 					if (a->ss.ss_family == AF_INET)
146 						ipv4 = 1;
147 					if (a->ss.ss_family == AF_INET6)
148 						ipv6 = 1;
149 				}
150 
151 				/* create ipv6 sock */
152 				if (ipv4 == 1 && ipv6 == 1) {
153 					sock_id++;
154 					sock->conf.child_id = sock_id;
155 					new_sock = sockets_conf_new_socket(env,
156 					    srv, sock_id, FCGI, 1);
157 					sockets_dup_new_socket(sock, new_sock);
158 					TAILQ_INSERT_TAIL(env->sockets,
159 					    new_sock, entry);
160 					continue;
161 				}
162 			}
163 		}
164 	}
165 }
166 
167 void
168 sockets_dup_new_socket(struct socket *p_sock, struct socket *sock)
169 {
170 	struct address *a, *acp;
171 	int n;
172 
173 	sock->conf.parent_id = p_sock->conf.id;
174 	sock->conf.ipv4 = 0;
175 	sock->conf.ipv6 = 1;
176 
177 	memcpy(&sock->conf.srv_name, p_sock->conf.srv_name,
178 	    sizeof(sock->conf.srv_name));
179 
180 	n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_child",
181 	    p_sock->conf.srv_name);
182 	if (n < 0) {
183 		free(p_sock->conf.al);
184 		free(p_sock);
185 		free(sock->conf.al);
186 		free(sock);
187 		fatalx("%s: snprintf", __func__);
188 	}
189 
190 	TAILQ_FOREACH(a, p_sock->conf.al, entry) {
191 		if (a->ss.ss_family == AF_INET)
192 			continue;
193 
194 		if ((acp = calloc(1, sizeof(*acp))) == NULL)
195 			fatal("%s: calloc", __func__);
196 		memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
197 		acp->ipproto = a->ipproto;
198 		acp->prefixlen = a->prefixlen;
199 		acp->port = a->port;
200 		if (strlen(a->ifname) != 0) {
201 			if (strlcpy(acp->ifname, a->ifname,
202 			    sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
203 				fatalx("%s: interface name truncated",
204 				    __func__);
205 			}
206 		}
207 
208 		TAILQ_INSERT_TAIL(sock->conf.al, acp, entry);
209 	}
210 }
211 
212 struct socket *
213 sockets_conf_new_socket(struct gotwebd *env, struct server *srv, int id,
214     int type, int is_dup)
215 {
216 	struct socket *sock;
217 	struct address *a, *acp;
218 	int n;
219 
220 	if ((sock = calloc(1, sizeof(*sock))) == NULL)
221 		fatalx("%s: calloc", __func__);
222 
223 	if ((sock->conf.al = calloc(1, sizeof(*sock->conf.al))) == NULL) {
224 		free(sock);
225 		fatalx("%s: calloc", __func__);
226 	}
227 	TAILQ_INIT(sock->conf.al);
228 
229 	sock->conf.parent_id = 0;
230 	sock->conf.id = id;
231 
232 	sock->fd = -1;
233 
234 	sock->conf.type = type;
235 
236 	if (type == UNIX) {
237 		if (strlcpy(sock->conf.unix_socket_name,
238 		    srv->unix_socket_name,
239 		    sizeof(sock->conf.unix_socket_name)) >=
240 		    sizeof(sock->conf.unix_socket_name)) {
241 			free(sock->conf.al);
242 			free(sock);
243 			fatalx("%s: strlcpy", __func__);
244 		}
245 	} else
246 		sock->conf.ipv4 = 1;
247 
248 	sock->conf.fcgi_socket_port = srv->fcgi_socket_port;
249 
250 	if (is_dup)
251 		goto done;
252 
253 	n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
254 	    srv->name);
255 	if (n < 0) {
256 		free(sock->conf.al);
257 		free(sock);
258 		fatalx("%s: snprintf", __func__);
259 	}
260 
261 	if (strlcpy(sock->conf.srv_name, srv->name,
262 	    sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
263 		free(sock->conf.al);
264 		free(sock);
265 		fatalx("%s: strlcpy", __func__);
266 	}
267 
268 	TAILQ_FOREACH(a, srv->al, entry) {
269 		if ((acp = calloc(1, sizeof(*acp))) == NULL) {
270 			free(sock->conf.al);
271 			free(sock);
272 			fatal("%s: calloc", __func__);
273 		}
274 		memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
275 		acp->ipproto = a->ipproto;
276 		acp->prefixlen = a->prefixlen;
277 		acp->port = a->port;
278 		if (strlen(a->ifname) != 0) {
279 			if (strlcpy(acp->ifname, a->ifname,
280 			    sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
281 				fatalx("%s: interface name truncated",
282 				    __func__);
283 			}
284 		}
285 
286 		TAILQ_INSERT_TAIL(sock->conf.al, acp, entry);
287 	}
288 done:
289 	return (sock);
290 }
291 
292 int
293 sockets_socket_af(struct sockaddr_storage *ss, in_port_t port)
294 {
295 	switch (ss->ss_family) {
296 	case AF_INET:
297 		((struct sockaddr_in *)ss)->sin_port = port;
298 /* TA: Iffy... */
299 #ifndef __linux__
300 		((struct sockaddr_in *)ss)->sin_len =
301 		    sizeof(struct sockaddr_in);
302 #endif
303 		break;
304 	case AF_INET6:
305 		((struct sockaddr_in6 *)ss)->sin6_port = port;
306 /* TA: Iffy... */
307 #ifndef __linux__
308 		((struct sockaddr_in6 *)ss)->sin6_len =
309 		    sizeof(struct sockaddr_in6);
310 #endif
311 		break;
312 	default:
313 		return -1;
314 	}
315 
316 	return 0;
317 }
318 
319 void
320 sockets_launch(void)
321 {
322 	struct socket *sock;
323 
324 	TAILQ_FOREACH(sock, gotwebd_env->sockets, entry) {
325 		log_debug("%s: configuring socket %d (%d)", __func__,
326 		    sock->conf.id, sock->fd);
327 
328 		event_set(&sock->ev, sock->fd, EV_READ | EV_PERSIST,
329 		    sockets_socket_accept, sock);
330 
331 		if (event_add(&sock->ev, NULL))
332 			fatalx("event add sock");
333 
334 		evtimer_set(&sock->pause, sockets_accept_paused, sock);
335 
336 		log_debug("%s: running socket listener %d", __func__,
337 		    sock->conf.id);
338 	}
339 }
340 
341 void
342 sockets_purge(struct gotwebd *env)
343 {
344 	struct socket *sock, *tsock;
345 
346 	/* shutdown and remove sockets */
347 	TAILQ_FOREACH_SAFE(sock, env->sockets, entry, tsock) {
348 		if (event_initialized(&sock->ev))
349 			event_del(&sock->ev);
350 		if (evtimer_initialized(&sock->evt))
351 			evtimer_del(&sock->evt);
352 		if (evtimer_initialized(&sock->pause))
353 			evtimer_del(&sock->pause);
354 		if (sock->fd != -1)
355 			close(sock->fd);
356 		TAILQ_REMOVE(env->sockets, sock, entry);
357 	}
358 }
359 
360 int
361 sockets_dispatch_gotwebd(int fd, struct privsep_proc *p, struct imsg *imsg)
362 {
363 	struct privsep *ps = p->p_ps;
364 	int res = 0, cmd = 0, verbose;
365 
366 	switch (imsg->hdr.type) {
367 	case IMSG_CFG_SRV:
368 		config_getserver(gotwebd_env, imsg);
369 		break;
370 	case IMSG_CFG_SOCK:
371 		config_getsock(gotwebd_env, imsg);
372 		break;
373 	case IMSG_CFG_FD:
374 		config_getfd(gotwebd_env, imsg);
375 		break;
376 	case IMSG_CFG_DONE:
377 		config_getcfg(gotwebd_env, imsg);
378 		break;
379 	case IMSG_CTL_START:
380 		sockets_launch();
381 		break;
382 	case IMSG_CTL_VERBOSE:
383 		IMSG_SIZE_CHECK(imsg, &verbose);
384 		memcpy(&verbose, imsg->data, sizeof(verbose));
385 		log_setverbose(verbose);
386 		break;
387 	default:
388 		return -1;
389 	}
390 
391 	switch (cmd) {
392 	case 0:
393 		break;
394 	default:
395 		if (proc_compose_imsg(ps, PROC_GOTWEBD, -1, cmd,
396 		    imsg->hdr.peerid, -1, &res, sizeof(res)) == -1)
397 			return -1;
398 		break;
399 	}
400 
401 	return 0;
402 }
403 
404 void
405 sockets_sighdlr(int sig, short event, void *arg)
406 {
407 	switch (sig) {
408 	case SIGHUP:
409 		log_info("%s: ignoring SIGHUP", __func__);
410 		break;
411 	case SIGPIPE:
412 		log_info("%s: ignoring SIGPIPE", __func__);
413 		break;
414 	case SIGUSR1:
415 		log_info("%s: ignoring SIGUSR1", __func__);
416 		break;
417 	case SIGCHLD:
418 		break;
419 	default:
420 		log_info("SIGNAL: %d", sig);
421 		fatalx("unexpected signal");
422 	}
423 }
424 
425 void
426 sockets_shutdown(void)
427 {
428 	struct server *srv, *tsrv;
429 	struct socket *sock, *tsock;
430 
431 	sockets_purge(gotwebd_env);
432 
433 	/* clean sockets */
434 	TAILQ_FOREACH_SAFE(sock, gotwebd_env->sockets, entry, tsock) {
435 		TAILQ_REMOVE(gotwebd_env->sockets, sock, entry);
436 		close(sock->fd);
437 		free(sock);
438 	}
439 
440 	/* clean servers */
441 	TAILQ_FOREACH_SAFE(srv, gotwebd_env->servers, entry, tsrv)
442 		free(srv);
443 
444 	free(gotwebd_env->sockets);
445 	free(gotwebd_env->servers);
446 	free(gotwebd_env);
447 }
448 
449 int
450 sockets_privinit(struct gotwebd *env, struct socket *sock)
451 {
452 	struct privsep *ps = env->gotwebd_ps;
453 
454 	if (sock->conf.type == UNIX) {
455 		log_debug("%s: initializing unix socket %s", __func__,
456 		    sock->conf.unix_socket_name);
457 		sock->fd = sockets_unix_socket_listen(ps, sock);
458 		if (sock->fd == -1) {
459 			log_warnx("%s: create unix socket failed", __func__);
460 			return -1;
461 		}
462 	}
463 
464 	if (sock->conf.type == FCGI) {
465 		log_debug("%s: initializing fcgi socket for %s", __func__,
466 		    sock->conf.name);
467 		sock->fd = sockets_create_socket(sock->conf.al,
468 		    sock->conf.fcgi_socket_port);
469 		if (sock->fd == -1) {
470 			log_warnx("%s: create unix socket failed", __func__);
471 			return -1;
472 		}
473 	}
474 
475 	return 0;
476 }
477 
478 int
479 sockets_unix_socket_listen(struct privsep *ps, struct socket *sock)
480 {
481 	struct gotwebd *env = ps->ps_env;
482 	struct sockaddr_un sun;
483 	struct socket *tsock;
484 	int u_fd = -1;
485 	mode_t old_umask, mode;
486 
487 	TAILQ_FOREACH(tsock, env->sockets, entry) {
488 		if (strcmp(tsock->conf.unix_socket_name,
489 		    sock->conf.unix_socket_name) == 0 &&
490 		    tsock->fd != -1)
491 			return (tsock->fd);
492 	}
493 
494 	/* TA: FIXME:  this needs upstreaming. */
495 	int socket_flags = SOCK_STREAM | SOCK_NONBLOCK;
496 #ifdef SOCK_CLOEXEC
497 	socket_flags |= SOCK_CLOEXEC;
498 #endif
499 	u_fd = socket(AF_UNIX, socket_flags, 0);
500 	if (u_fd == -1) {
501 		log_warn("%s: socket", __func__);
502 		return -1;
503 	}
504 
505 	sun.sun_family = AF_UNIX;
506 	if (strlcpy(sun.sun_path, sock->conf.unix_socket_name,
507 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
508 		log_warn("%s: %s name too long", __func__,
509 		    sock->conf.unix_socket_name);
510 		close(u_fd);
511 		return -1;
512 	}
513 
514 	if (unlink(sock->conf.unix_socket_name) == -1) {
515 		if (errno != ENOENT) {
516 			log_warn("%s: unlink %s", __func__,
517 			    sock->conf.unix_socket_name);
518 			close(u_fd);
519 			return -1;
520 		}
521 	}
522 
523 	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
524 	mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
525 
526 	if (bind(u_fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
527 		log_warn("%s: bind: %s", __func__, sock->conf.unix_socket_name);
528 		close(u_fd);
529 		(void)umask(old_umask);
530 		return -1;
531 	}
532 
533 	(void)umask(old_umask);
534 
535 	if (chmod(sock->conf.unix_socket_name, mode) == -1) {
536 		log_warn("%s: chmod", __func__);
537 		close(u_fd);
538 		(void)unlink(sock->conf.unix_socket_name);
539 		return -1;
540 	}
541 
542 	if (chown(sock->conf.unix_socket_name, ps->ps_pw->pw_uid,
543 	    ps->ps_pw->pw_gid) == -1) {
544 		log_warn("%s: chown", __func__);
545 		close(u_fd);
546 		(void)unlink(sock->conf.unix_socket_name);
547 		return -1;
548 	}
549 
550 	if (listen(u_fd, SOCKS_BACKLOG) == -1) {
551 		log_warn("%s: listen", __func__);
552 		return -1;
553 	}
554 
555 	return u_fd;
556 }
557 
558 int
559 sockets_create_socket(struct addresslist *al, in_port_t port)
560 {
561 	struct addrinfo hints;
562 	struct address *a;
563 	int fd = -1, o_val = 1, flags;
564 
565 	memset(&hints, 0, sizeof(hints));
566 	hints.ai_family = AF_UNSPEC;
567 	hints.ai_socktype = SOCK_STREAM;
568 	hints.ai_flags |= AI_PASSIVE;
569 
570 	TAILQ_FOREACH(a, al, entry) {
571 		if (sockets_socket_af(&a->ss, port) == -1) {
572 			log_warnx("%s: sockets_socket_af", __func__);
573 			goto fail;
574 		}
575 
576 		fd = socket(a->ss.ss_family, hints.ai_socktype,
577 		    a->ipproto);
578 			log_debug("%s: opening socket (%d) for %s", __func__,
579 			    fd, a->ifname);
580 
581 		if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &o_val,
582 		    sizeof(int)) == -1) {
583 			log_warn("%s: setsockopt error", __func__);
584 			return -1;
585 		}
586 
587 		/* non-blocking */
588 		flags = fcntl(fd, F_GETFL);
589 		flags |= O_NONBLOCK;
590 		fcntl(fd, F_SETFL, flags);
591 
592 		/* TA: 'sizeof a' vs a->ss.len */ 
593 		if (bind(fd, (struct sockaddr *)&a->ss, sizeof a) == -1) {
594 			close(fd);
595 			log_info("%s: can't bind to port %d", __func__,
596 			    ntohs(port));
597 			goto fail;
598 		}
599 
600 		if (listen(fd, SOMAXCONN) == -1) {
601 			log_warn("%s, unable to listen on socket", __func__);
602 			goto fail;
603 		}
604 	}
605 
606 	free(a);
607 	return (fd);
608 fail:
609 	free(a);
610 	return -1;
611 }
612 
613 int
614 sockets_accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
615     int reserve, volatile int *counter)
616 {
617 	int ret;
618 
619 	if (getdtablecount() + reserve +
620 	    ((*counter + 1) * FD_NEEDED) >= getdtablesize()) {
621 		log_debug("inflight fds exceeded");
622 		errno = EMFILE;
623 		return -1;
624 	}
625 /* TA:  This needs fixing upstream. */
626 #ifdef __APPLE__
627 	ret = accept(sockfd, addr, addrlen);
628 #else
629 	ret = accept4(sockfd, addr, addrlen, SOCK_NONBLOCK | SOCK_CLOEXEC);
630 #endif
631 
632 	if (ret > -1) {
633 		(*counter)++;
634 		log_debug("inflight incremented, now %d", *counter);
635 	}
636 
637 	return ret;
638 }
639 
640 void
641 sockets_accept_paused(int fd, short events, void *arg)
642 {
643 	struct socket *sock = (struct socket *)arg;
644 
645 	event_add(&sock->ev, NULL);
646 }
647 
648 void
649 sockets_socket_accept(int fd, short event, void *arg)
650 {
651 	struct socket *sock = (struct socket *)arg;
652 	struct sockaddr_storage ss;
653 	struct timeval backoff;
654 	struct request *c = NULL;
655 	socklen_t len;
656 	int s;
657 
658 	backoff.tv_sec = 1;
659 	backoff.tv_usec = 0;
660 
661 	event_add(&sock->ev, NULL);
662 	if (event & EV_TIMEOUT)
663 		return;
664 
665 	len = sizeof(ss);
666 
667 	s = sockets_accept_reserve(fd, (struct sockaddr *)&ss, &len,
668 	    FD_RESERVE, &cgi_inflight);
669 
670 	if (s == -1) {
671 		switch (errno) {
672 		case EINTR:
673 		case EWOULDBLOCK:
674 		case ECONNABORTED:
675 			return;
676 		case EMFILE:
677 		case ENFILE:
678 			event_del(&sock->ev);
679 			evtimer_add(&sock->pause, &backoff);
680 			return;
681 		default:
682 			log_warn("%s: accept", __func__);
683 		}
684 	}
685 
686 	if (client_cnt > GOTWEBD_MAXCLIENTS)
687 		goto err;
688 
689 	c = calloc(1, sizeof(struct request));
690 	if (c == NULL) {
691 		log_warn("%s", __func__);
692 		close(s);
693 		cgi_inflight--;
694 		return;
695 	}
696 
697 	c->fd = s;
698 	c->sock = sock;
699 	memcpy(c->priv_fd, sock->priv_fd, sizeof(c->priv_fd));
700 	c->buf_pos = 0;
701 	c->buf_len = 0;
702 	c->request_started = 0;
703 	c->sock->client_status = CLIENT_CONNECT;
704 
705 	event_set(&c->ev, s, EV_READ, fcgi_request, c);
706 	event_add(&c->ev, NULL);
707 
708 	evtimer_set(&c->tmo, fcgi_timeout, c);
709 	evtimer_add(&c->tmo, &timeout);
710 
711 	client_cnt++;
712 
713 	return;
714 err:
715 	cgi_inflight--;
716 	close(s);
717 	if (c != NULL)
718 		free(c);
719 }
720 
721 void
722 sockets_rlimit(int maxfd)
723 {
724 	struct rlimit rl;
725 
726 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
727 		fatal("%s: failed to get resource limit", __func__);
728 	log_debug("%s: max open files %llu", __func__, rl.rlim_max);
729 
730 	/*
731 	 * Allow the maximum number of open file descriptors for this
732 	 * login class (which should be the class "daemon" by default).
733 	 */
734 	if (maxfd == -1)
735 		rl.rlim_cur = rl.rlim_max;
736 	else
737 		rl.rlim_cur = MAXIMUM(rl.rlim_max, (rlim_t)maxfd);
738 	if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
739 		fatal("%s: failed to set resource limit", __func__);
740 }