Gotweb

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Date:: Sun Jul 17 19:08:31 2022 UTC
Message:: fix potential type mismatch between format specifier and argument Cast argument of type rlim_t to unsigned long long to match the %llu format specifier on platforms where this might not be the case.
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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/queue.h>
23 #include <sys/wait.h>
24 #include <sys/uio.h>
25 #include <sys/resource.h>
26 #include <sys/socket.h>
27 #include <sys/stat.h>
28 #include <sys/time.h>
29 #include <sys/types.h>
30 #include <sys/mman.h>
31 #include <sys/un.h>
32 
33 #include <net/if.h>
34 #include <netinet/in.h>
35 
36 #include <errno.h>
37 #include <event.h>
38 #include <fcntl.h>
39 #include <ifaddrs.h>
40 #include <limits.h>
41 #include <netdb.h>
42 #include <poll.h>
43 #include <pwd.h>
44 #include <stddef.h>
45 #include <stdio.h>
46 #include <stdlib.h>
47 #include <string.h>
48 #include <unistd.h>
49 
50 #include "got_error.h"
51 #include "got_opentemp.h"
52 
53 #include "proc.h"
54 #include "gotwebd.h"
55 
56 #include "got_compat.h"
57 
58 #define SOCKS_BACKLOG 5
59 #define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))
60 
61 
62 volatile int client_cnt;
63 
64 struct timeval	timeout = { TIMEOUT_DEFAULT, 0 };
65 
66 void	 sockets_sighdlr(int, short, void *);
67 void	 sockets_run(struct privsep *, struct privsep_proc *, void *);
68 void	 sockets_launch(void);
69 void	 sockets_purge(struct gotwebd *);
70 void	 sockets_accept_paused(int, short, void *);
71 void	 sockets_dup_new_socket(struct socket *, struct socket *);
72 void	 sockets_rlimit(int);
73 
74 
75 int	 sockets_dispatch_gotwebd(int, struct privsep_proc *, struct imsg *);
76 int	 sockets_unix_socket_listen(struct privsep *, struct socket *);
77 int	 sockets_create_socket(struct addresslist *, in_port_t);
78 int	 sockets_socket_af(struct sockaddr_storage *, in_port_t);
79 int	 sockets_accept_reserve(int, struct sockaddr *, socklen_t *, int,
80 	    volatile int *);
81 
82 struct socket
83 	*sockets_conf_new_socket(struct gotwebd *, struct server *, int, int,
84 	    int);
85 
86 int cgi_inflight = 0;
87 
88 static struct privsep_proc procs[] = {
89 	{ "gotwebd",	PROC_GOTWEBD,	sockets_dispatch_gotwebd  },
90 };
91 
92 void
93 sockets(struct privsep *ps, struct privsep_proc *p)
94 {
95 	proc_run(ps, p, procs, nitems(procs), sockets_run, NULL);
96 }
97 
98 void
99 sockets_run(struct privsep *ps, struct privsep_proc *p, void *arg)
100 {
101 	if (config_init(ps->ps_env) == -1)
102 		fatal("failed to initialize configuration");
103 
104 	p->p_shutdown = sockets_shutdown;
105 
106 	sockets_rlimit(-1);
107 
108 	signal_del(&ps->ps_evsigchld);
109 	signal_set(&ps->ps_evsigchld, SIGCHLD, sockets_sighdlr, ps);
110 	signal_add(&ps->ps_evsigchld, NULL);
111 
112 #ifndef PROFILE
113 	if (pledge("stdio rpath wpath cpath inet recvfd proc exec sendfd",
114 	    NULL) == -1)
115 		fatal("pledge");
116 #endif
117 }
118 
119 void
120 sockets_parse_sockets(struct gotwebd *env)
121 {
122 	struct server *srv;
123 	struct socket *sock, *new_sock = NULL;
124 	struct address *a;
125 	int sock_id = 0, ipv4 = 0, ipv6 = 0;
126 
127 	TAILQ_FOREACH(srv, env->servers, entry) {
128 		if (srv->unix_socket) {
129 			sock_id++;
130 			new_sock = sockets_conf_new_socket(env, srv,
131 			    sock_id, UNIX, 0);
132 			TAILQ_INSERT_TAIL(env->sockets, new_sock, entry);
133 		}
134 
135 		if (srv->fcgi_socket) {
136 			sock_id++;
137 			new_sock = sockets_conf_new_socket(env, srv,
138 			    sock_id, FCGI, 0);
139 			TAILQ_INSERT_TAIL(env->sockets, new_sock, entry);
140 
141 			/* add ipv6 children */
142 			TAILQ_FOREACH(sock, env->sockets, entry) {
143 				ipv4 = ipv6 = 0;
144 
145 				TAILQ_FOREACH(a, sock->conf.al, entry) {
146 					if (a->ss.ss_family == AF_INET)
147 						ipv4 = 1;
148 					if (a->ss.ss_family == AF_INET6)
149 						ipv6 = 1;
150 				}
151 
152 				/* create ipv6 sock */
153 				if (ipv4 == 1 && ipv6 == 1) {
154 					sock_id++;
155 					sock->conf.child_id = sock_id;
156 					new_sock = sockets_conf_new_socket(env,
157 					    srv, sock_id, FCGI, 1);
158 					sockets_dup_new_socket(sock, new_sock);
159 					TAILQ_INSERT_TAIL(env->sockets,
160 					    new_sock, entry);
161 					continue;
162 				}
163 			}
164 		}
165 	}
166 }
167 
168 void
169 sockets_dup_new_socket(struct socket *p_sock, struct socket *sock)
170 {
171 	struct address *a, *acp;
172 	int n;
173 
174 	sock->conf.parent_id = p_sock->conf.id;
175 	sock->conf.ipv4 = 0;
176 	sock->conf.ipv6 = 1;
177 
178 	memcpy(&sock->conf.srv_name, p_sock->conf.srv_name,
179 	    sizeof(sock->conf.srv_name));
180 
181 	n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_child",
182 	    p_sock->conf.srv_name);
183 	if (n < 0) {
184 		free(p_sock->conf.al);
185 		free(p_sock);
186 		free(sock->conf.al);
187 		free(sock);
188 		fatalx("%s: snprintf", __func__);
189 	}
190 
191 	TAILQ_FOREACH(a, p_sock->conf.al, entry) {
192 		if (a->ss.ss_family == AF_INET)
193 			continue;
194 
195 		if ((acp = calloc(1, sizeof(*acp))) == NULL)
196 			fatal("%s: calloc", __func__);
197 		memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
198 		acp->ipproto = a->ipproto;
199 		acp->prefixlen = a->prefixlen;
200 		acp->port = a->port;
201 		if (strlen(a->ifname) != 0) {
202 			if (strlcpy(acp->ifname, a->ifname,
203 			    sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
204 				fatalx("%s: interface name truncated",
205 				    __func__);
206 			}
207 		}
208 
209 		TAILQ_INSERT_TAIL(sock->conf.al, acp, entry);
210 	}
211 }
212 
213 struct socket *
214 sockets_conf_new_socket(struct gotwebd *env, struct server *srv, int id,
215     int type, int is_dup)
216 {
217 	struct socket *sock;
218 	struct address *a, *acp;
219 	int n;
220 
221 	if ((sock = calloc(1, sizeof(*sock))) == NULL)
222 		fatalx("%s: calloc", __func__);
223 
224 	if ((sock->conf.al = calloc(1, sizeof(*sock->conf.al))) == NULL) {
225 		free(sock);
226 		fatalx("%s: calloc", __func__);
227 	}
228 	TAILQ_INIT(sock->conf.al);
229 
230 	sock->conf.parent_id = 0;
231 	sock->conf.id = id;
232 
233 	sock->fd = -1;
234 
235 	sock->conf.type = type;
236 
237 	if (type == UNIX) {
238 		if (strlcpy(sock->conf.unix_socket_name,
239 		    srv->unix_socket_name,
240 		    sizeof(sock->conf.unix_socket_name)) >=
241 		    sizeof(sock->conf.unix_socket_name)) {
242 			free(sock->conf.al);
243 			free(sock);
244 			fatalx("%s: strlcpy", __func__);
245 		}
246 	} else
247 		sock->conf.ipv4 = 1;
248 
249 	sock->conf.fcgi_socket_port = srv->fcgi_socket_port;
250 
251 	if (is_dup)
252 		goto done;
253 
254 	n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
255 	    srv->name);
256 	if (n < 0) {
257 		free(sock->conf.al);
258 		free(sock);
259 		fatalx("%s: snprintf", __func__);
260 	}
261 
262 	if (strlcpy(sock->conf.srv_name, srv->name,
263 	    sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
264 		free(sock->conf.al);
265 		free(sock);
266 		fatalx("%s: strlcpy", __func__);
267 	}
268 
269 	TAILQ_FOREACH(a, srv->al, entry) {
270 		if ((acp = calloc(1, sizeof(*acp))) == NULL) {
271 			free(sock->conf.al);
272 			free(sock);
273 			fatal("%s: calloc", __func__);
274 		}
275 		memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
276 		acp->ipproto = a->ipproto;
277 		acp->prefixlen = a->prefixlen;
278 		acp->port = a->port;
279 		if (strlen(a->ifname) != 0) {
280 			if (strlcpy(acp->ifname, a->ifname,
281 			    sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
282 				fatalx("%s: interface name truncated",
283 				    __func__);
284 			}
285 		}
286 
287 		TAILQ_INSERT_TAIL(sock->conf.al, acp, entry);
288 	}
289 done:
290 	return (sock);
291 }
292 
293 int
294 sockets_socket_af(struct sockaddr_storage *ss, in_port_t port)
295 {
296 	switch (ss->ss_family) {
297 	case AF_INET:
298 		((struct sockaddr_in *)ss)->sin_port = port;
299 /* TA: Iffy... */
300 #ifndef __linux__
301 		((struct sockaddr_in *)ss)->sin_len =
302 		    sizeof(struct sockaddr_in);
303 #endif
304 		break;
305 	case AF_INET6:
306 		((struct sockaddr_in6 *)ss)->sin6_port = port;
307 /* TA: Iffy... */
308 #ifndef __linux__
309 		((struct sockaddr_in6 *)ss)->sin6_len =
310 		    sizeof(struct sockaddr_in6);
311 #endif
312 		break;
313 	default:
314 		return -1;
315 	}
316 
317 	return 0;
318 }
319 
320 void
321 sockets_launch(void)
322 {
323 	struct socket *sock;
324 
325 	TAILQ_FOREACH(sock, gotwebd_env->sockets, entry) {
326 		log_debug("%s: configuring socket %d (%d)", __func__,
327 		    sock->conf.id, sock->fd);
328 
329 		event_set(&sock->ev, sock->fd, EV_READ | EV_PERSIST,
330 		    sockets_socket_accept, sock);
331 
332 		if (event_add(&sock->ev, NULL))
333 			fatalx("event add sock");
334 
335 		evtimer_set(&sock->pause, sockets_accept_paused, sock);
336 
337 		log_debug("%s: running socket listener %d", __func__,
338 		    sock->conf.id);
339 	}
340 }
341 
342 void
343 sockets_purge(struct gotwebd *env)
344 {
345 	struct socket *sock, *tsock;
346 
347 	/* shutdown and remove sockets */
348 	TAILQ_FOREACH_SAFE(sock, env->sockets, entry, tsock) {
349 		if (event_initialized(&sock->ev))
350 			event_del(&sock->ev);
351 		if (evtimer_initialized(&sock->evt))
352 			evtimer_del(&sock->evt);
353 		if (evtimer_initialized(&sock->pause))
354 			evtimer_del(&sock->pause);
355 		if (sock->fd != -1)
356 			close(sock->fd);
357 		TAILQ_REMOVE(env->sockets, sock, entry);
358 	}
359 }
360 
361 int
362 sockets_dispatch_gotwebd(int fd, struct privsep_proc *p, struct imsg *imsg)
363 {
364 	struct privsep *ps = p->p_ps;
365 	int res = 0, cmd = 0, verbose;
366 
367 	switch (imsg->hdr.type) {
368 	case IMSG_CFG_SRV:
369 		config_getserver(gotwebd_env, imsg);
370 		break;
371 	case IMSG_CFG_SOCK:
372 		config_getsock(gotwebd_env, imsg);
373 		break;
374 	case IMSG_CFG_FD:
375 		config_getfd(gotwebd_env, imsg);
376 		break;
377 	case IMSG_CFG_DONE:
378 		config_getcfg(gotwebd_env, imsg);
379 		break;
380 	case IMSG_CTL_START:
381 		sockets_launch();
382 		break;
383 	case IMSG_CTL_VERBOSE:
384 		IMSG_SIZE_CHECK(imsg, &verbose);
385 		memcpy(&verbose, imsg->data, sizeof(verbose));
386 		log_setverbose(verbose);
387 		break;
388 	default:
389 		return -1;
390 	}
391 
392 	switch (cmd) {
393 	case 0:
394 		break;
395 	default:
396 		if (proc_compose_imsg(ps, PROC_GOTWEBD, -1, cmd,
397 		    imsg->hdr.peerid, -1, &res, sizeof(res)) == -1)
398 			return -1;
399 		break;
400 	}
401 
402 	return 0;
403 }
404 
405 void
406 sockets_sighdlr(int sig, short event, void *arg)
407 {
408 	switch (sig) {
409 	case SIGHUP:
410 		log_info("%s: ignoring SIGHUP", __func__);
411 		break;
412 	case SIGPIPE:
413 		log_info("%s: ignoring SIGPIPE", __func__);
414 		break;
415 	case SIGUSR1:
416 		log_info("%s: ignoring SIGUSR1", __func__);
417 		break;
418 	case SIGCHLD:
419 		break;
420 	default:
421 		log_info("SIGNAL: %d", sig);
422 		fatalx("unexpected signal");
423 	}
424 }
425 
426 void
427 sockets_shutdown(void)
428 {
429 	struct server *srv, *tsrv;
430 	struct socket *sock, *tsock;
431 
432 	sockets_purge(gotwebd_env);
433 
434 	/* clean sockets */
435 	TAILQ_FOREACH_SAFE(sock, gotwebd_env->sockets, entry, tsock) {
436 		TAILQ_REMOVE(gotwebd_env->sockets, sock, entry);
437 		close(sock->fd);
438 		free(sock);
439 	}
440 
441 	/* clean servers */
442 	TAILQ_FOREACH_SAFE(srv, gotwebd_env->servers, entry, tsrv)
443 		free(srv);
444 
445 	free(gotwebd_env->sockets);
446 	free(gotwebd_env->servers);
447 	free(gotwebd_env);
448 }
449 
450 int
451 sockets_privinit(struct gotwebd *env, struct socket *sock)
452 {
453 	struct privsep *ps = env->gotwebd_ps;
454 
455 	if (sock->conf.type == UNIX) {
456 		log_debug("%s: initializing unix socket %s", __func__,
457 		    sock->conf.unix_socket_name);
458 		sock->fd = sockets_unix_socket_listen(ps, sock);
459 		if (sock->fd == -1) {
460 			log_warnx("%s: create unix socket failed", __func__);
461 			return -1;
462 		}
463 	}
464 
465 	if (sock->conf.type == FCGI) {
466 		log_debug("%s: initializing fcgi socket for %s", __func__,
467 		    sock->conf.name);
468 		sock->fd = sockets_create_socket(sock->conf.al,
469 		    sock->conf.fcgi_socket_port);
470 		if (sock->fd == -1) {
471 			log_warnx("%s: create unix socket failed", __func__);
472 			return -1;
473 		}
474 	}
475 
476 	return 0;
477 }
478 
479 int
480 sockets_unix_socket_listen(struct privsep *ps, struct socket *sock)
481 {
482 	struct gotwebd *env = ps->ps_env;
483 	struct sockaddr_un sun;
484 	struct socket *tsock;
485 	int u_fd = -1;
486 	mode_t old_umask, mode;
487 
488 	TAILQ_FOREACH(tsock, env->sockets, entry) {
489 		if (strcmp(tsock->conf.unix_socket_name,
490 		    sock->conf.unix_socket_name) == 0 &&
491 		    tsock->fd != -1)
492 			return (tsock->fd);
493 	}
494 
495 	/* TA: FIXME:  this needs upstreaming. */
496 	int socket_flags = SOCK_STREAM | SOCK_NONBLOCK;
497 #ifdef SOCK_CLOEXEC
498 	socket_flags |= SOCK_CLOEXEC;
499 #endif
500 	u_fd = socket(AF_UNIX, socket_flags, 0);
501 	if (u_fd == -1) {
502 		log_warn("%s: socket", __func__);
503 		return -1;
504 	}
505 
506 	sun.sun_family = AF_UNIX;
507 	if (strlcpy(sun.sun_path, sock->conf.unix_socket_name,
508 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
509 		log_warn("%s: %s name too long", __func__,
510 		    sock->conf.unix_socket_name);
511 		close(u_fd);
512 		return -1;
513 	}
514 
515 	if (unlink(sock->conf.unix_socket_name) == -1) {
516 		if (errno != ENOENT) {
517 			log_warn("%s: unlink %s", __func__,
518 			    sock->conf.unix_socket_name);
519 			close(u_fd);
520 			return -1;
521 		}
522 	}
523 
524 	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
525 	mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
526 
527 	if (bind(u_fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
528 		log_warn("%s: bind: %s", __func__, sock->conf.unix_socket_name);
529 		close(u_fd);
530 		(void)umask(old_umask);
531 		return -1;
532 	}
533 
534 	(void)umask(old_umask);
535 
536 	if (chmod(sock->conf.unix_socket_name, mode) == -1) {
537 		log_warn("%s: chmod", __func__);
538 		close(u_fd);
539 		(void)unlink(sock->conf.unix_socket_name);
540 		return -1;
541 	}
542 
543 	if (chown(sock->conf.unix_socket_name, ps->ps_pw->pw_uid,
544 	    ps->ps_pw->pw_gid) == -1) {
545 		log_warn("%s: chown", __func__);
546 		close(u_fd);
547 		(void)unlink(sock->conf.unix_socket_name);
548 		return -1;
549 	}
550 
551 	if (listen(u_fd, SOCKS_BACKLOG) == -1) {
552 		log_warn("%s: listen", __func__);
553 		return -1;
554 	}
555 
556 	return u_fd;
557 }
558 
559 int
560 sockets_create_socket(struct addresslist *al, in_port_t port)
561 {
562 	struct addrinfo hints;
563 	struct address *a;
564 	int fd = -1, o_val = 1, flags;
565 
566 	memset(&hints, 0, sizeof(hints));
567 	hints.ai_family = AF_UNSPEC;
568 	hints.ai_socktype = SOCK_STREAM;
569 	hints.ai_flags |= AI_PASSIVE;
570 
571 	TAILQ_FOREACH(a, al, entry) {
572 		if (sockets_socket_af(&a->ss, port) == -1) {
573 			log_warnx("%s: sockets_socket_af", __func__);
574 			goto fail;
575 		}
576 
577 		fd = socket(a->ss.ss_family, hints.ai_socktype,
578 		    a->ipproto);
579 			log_debug("%s: opening socket (%d) for %s", __func__,
580 			    fd, a->ifname);
581 
582 		if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &o_val,
583 		    sizeof(int)) == -1) {
584 			log_warn("%s: setsockopt error", __func__);
585 			return -1;
586 		}
587 
588 		/* non-blocking */
589 		flags = fcntl(fd, F_GETFL);
590 		flags |= O_NONBLOCK;
591 		fcntl(fd, F_SETFL, flags);
592 
593 		/* TA: 'sizeof a' vs a->ss.len */ 
594 		if (bind(fd, (struct sockaddr *)&a->ss, sizeof a) == -1) {
595 			close(fd);
596 			log_info("%s: can't bind to port %d", __func__,
597 			    ntohs(port));
598 			goto fail;
599 		}
600 
601 		if (listen(fd, SOMAXCONN) == -1) {
602 			log_warn("%s, unable to listen on socket", __func__);
603 			goto fail;
604 		}
605 	}
606 
607 	free(a);
608 	return (fd);
609 fail:
610 	free(a);
611 	return -1;
612 }
613 
614 int
615 sockets_accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
616     int reserve, volatile int *counter)
617 {
618 	int ret;
619 
620 	if (getdtablecount() + reserve +
621 	    ((*counter + 1) * FD_NEEDED) >= getdtablesize()) {
622 		log_debug("inflight fds exceeded");
623 		errno = EMFILE;
624 		return -1;
625 	}
626 /* TA:  This needs fixing upstream. */
627 #ifdef __APPLE__
628 	ret = accept(sockfd, addr, addrlen);
629 #else
630 	ret = accept4(sockfd, addr, addrlen, SOCK_NONBLOCK | SOCK_CLOEXEC);
631 #endif
632 
633 	if (ret > -1) {
634 		(*counter)++;
635 		log_debug("inflight incremented, now %d", *counter);
636 	}
637 
638 	return ret;
639 }
640 
641 void
642 sockets_accept_paused(int fd, short events, void *arg)
643 {
644 	struct socket *sock = (struct socket *)arg;
645 
646 	event_add(&sock->ev, NULL);
647 }
648 
649 void
650 sockets_socket_accept(int fd, short event, void *arg)
651 {
652 	struct socket *sock = (struct socket *)arg;
653 	struct sockaddr_storage ss;
654 	struct timeval backoff;
655 	struct request *c = NULL;
656 	socklen_t len;
657 	int s;
658 
659 	backoff.tv_sec = 1;
660 	backoff.tv_usec = 0;
661 
662 	event_add(&sock->ev, NULL);
663 	if (event & EV_TIMEOUT)
664 		return;
665 
666 	len = sizeof(ss);
667 
668 	s = sockets_accept_reserve(fd, (struct sockaddr *)&ss, &len,
669 	    FD_RESERVE, &cgi_inflight);
670 
671 	if (s == -1) {
672 		switch (errno) {
673 		case EINTR:
674 		case EWOULDBLOCK:
675 		case ECONNABORTED:
676 			return;
677 		case EMFILE:
678 		case ENFILE:
679 			event_del(&sock->ev);
680 			evtimer_add(&sock->pause, &backoff);
681 			return;
682 		default:
683 			log_warn("%s: accept", __func__);
684 		}
685 	}
686 
687 	if (client_cnt > GOTWEBD_MAXCLIENTS)
688 		goto err;
689 
690 	c = calloc(1, sizeof(struct request));
691 	if (c == NULL) {
692 		log_warn("%s", __func__);
693 		close(s);
694 		cgi_inflight--;
695 		return;
696 	}
697 
698 	c->fd = s;
699 	c->sock = sock;
700 	memcpy(c->priv_fd, sock->priv_fd, sizeof(c->priv_fd));
701 	c->buf_pos = 0;
702 	c->buf_len = 0;
703 	c->request_started = 0;
704 	c->sock->client_status = CLIENT_CONNECT;
705 
706 	event_set(&c->ev, s, EV_READ, fcgi_request, c);
707 	event_add(&c->ev, NULL);
708 
709 	evtimer_set(&c->tmo, fcgi_timeout, c);
710 	evtimer_add(&c->tmo, &timeout);
711 
712 	client_cnt++;
713 
714 	return;
715 err:
716 	cgi_inflight--;
717 	close(s);
718 	if (c != NULL)
719 		free(c);
720 }
721 
722 void
723 sockets_rlimit(int maxfd)
724 {
725 	struct rlimit rl;
726 
727 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
728 		fatal("%s: failed to get resource limit", __func__);
729 	log_debug("%s: max open files %llu", __func__,
730 	    (unsigned long long)rl.rlim_max);
731 
732 	/*
733 	 * Allow the maximum number of open file descriptors for this
734 	 * login class (which should be the class "daemon" by default).
735 	 */
736 	if (maxfd == -1)
737 		rl.rlim_cur = rl.rlim_max;
738 	else
739 		rl.rlim_cur = MAXIMUM(rl.rlim_max, (rlim_t)maxfd);
740 	if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
741 		fatal("%s: failed to set resource limit", __func__);
742 }