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 Mike Larkin <mlarkin@openbsd.org>
  4 a596b957 2022-07-14 tracey  * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
  5 a596b957 2022-07-14 tracey  * Copyright (c) 2013 Florian Obser <florian@openbsd.org>
  6 a596b957 2022-07-14 tracey  *
  7 a596b957 2022-07-14 tracey  * Permission to use, copy, modify, and distribute this software for any
  8 a596b957 2022-07-14 tracey  * purpose with or without fee is hereby granted, provided that the above
  9 a596b957 2022-07-14 tracey  * copyright notice and this permission notice appear in all copies.
 10 a596b957 2022-07-14 tracey  *
 11 a596b957 2022-07-14 tracey  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 12 a596b957 2022-07-14 tracey  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 13 a596b957 2022-07-14 tracey  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 14 a596b957 2022-07-14 tracey  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 15 a596b957 2022-07-14 tracey  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 16 a596b957 2022-07-14 tracey  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 17 a596b957 2022-07-14 tracey  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 18 a596b957 2022-07-14 tracey  */
 19 a596b957 2022-07-14 tracey 
 20 a596b957 2022-07-14 tracey #include <sys/param.h>
 21 a596b957 2022-07-14 tracey #include <sys/ioctl.h>
 22 a596b957 2022-07-14 tracey #include <sys/queue.h>
 23 a596b957 2022-07-14 tracey #include <sys/wait.h>
 24 a596b957 2022-07-14 tracey #include <sys/uio.h>
 25 a596b957 2022-07-14 tracey #include <sys/resource.h>
 26 a596b957 2022-07-14 tracey #include <sys/socket.h>
 27 a596b957 2022-07-14 tracey #include <sys/stat.h>
 28 a596b957 2022-07-14 tracey #include <sys/time.h>
 29 a596b957 2022-07-14 tracey #include <sys/types.h>
 30 a596b957 2022-07-14 tracey #include <sys/mman.h>
 31 a596b957 2022-07-14 tracey #include <sys/un.h>
 32 a596b957 2022-07-14 tracey 
 33 a596b957 2022-07-14 tracey #include <net/if.h>
 34 a596b957 2022-07-14 tracey #include <netinet/in.h>
 35 a596b957 2022-07-14 tracey 
 36 a596b957 2022-07-14 tracey #include <errno.h>
 37 a596b957 2022-07-14 tracey #include <event.h>
 38 a596b957 2022-07-14 tracey #include <fcntl.h>
 39 a596b957 2022-07-14 tracey #include <ifaddrs.h>
 40 a596b957 2022-07-14 tracey #include <imsg.h>
 41 a596b957 2022-07-14 tracey #include <limits.h>
 42 a596b957 2022-07-14 tracey #include <netdb.h>
 43 a596b957 2022-07-14 tracey #include <poll.h>
 44 a596b957 2022-07-14 tracey #include <pwd.h>
 45 a596b957 2022-07-14 tracey #include <stddef.h>
 46 a596b957 2022-07-14 tracey #include <stdio.h>
 47 a596b957 2022-07-14 tracey #include <stdlib.h>
 48 a596b957 2022-07-14 tracey #include <string.h>
 49 a596b957 2022-07-14 tracey #include <unistd.h>
 50 a596b957 2022-07-14 tracey #include <util.h>
 51 a596b957 2022-07-14 tracey 
 52 a596b957 2022-07-14 tracey #include "got_error.h"
 53 a596b957 2022-07-14 tracey #include "got_opentemp.h"
 54 df2d3cd2 2023-03-11 op #include "got_reference.h"
 55 b5c757f5 2022-09-01 stsp #include "got_repository.h"
 56 a596b957 2022-07-14 tracey 
 57 a596b957 2022-07-14 tracey #include "proc.h"
 58 a596b957 2022-07-14 tracey #include "gotwebd.h"
 59 ed619ca0 2022-12-14 op #include "tmpl.h"
 60 a596b957 2022-07-14 tracey 
 61 a596b957 2022-07-14 tracey #define SOCKS_BACKLOG 5
 62 a596b957 2022-07-14 tracey #define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))
 63 a596b957 2022-07-14 tracey 
 64 a596b957 2022-07-14 tracey 
 65 a596b957 2022-07-14 tracey volatile int client_cnt;
 66 a596b957 2022-07-14 tracey 
 67 026ac2c4 2022-08-20 stsp static struct timeval	timeout = { TIMEOUT_DEFAULT, 0 };
 68 a596b957 2022-07-14 tracey 
 69 026ac2c4 2022-08-20 stsp static void	 sockets_sighdlr(int, short, void *);
 70 026ac2c4 2022-08-20 stsp static void	 sockets_run(struct privsep *, struct privsep_proc *, void *);
 71 026ac2c4 2022-08-20 stsp static void	 sockets_launch(void);
 72 026ac2c4 2022-08-20 stsp static void	 sockets_purge(struct gotwebd *);
 73 026ac2c4 2022-08-20 stsp static void	 sockets_accept_paused(int, short, void *);
 74 026ac2c4 2022-08-20 stsp static void	 sockets_rlimit(int);
 75 a596b957 2022-07-14 tracey 
 76 026ac2c4 2022-08-20 stsp static int	 sockets_dispatch_gotwebd(int, struct privsep_proc *,
 77 026ac2c4 2022-08-20 stsp 		    struct imsg *);
 78 026ac2c4 2022-08-20 stsp static int	 sockets_unix_socket_listen(struct privsep *, struct socket *);
 79 026ac2c4 2022-08-20 stsp static int	 sockets_create_socket(struct address *, in_port_t);
 80 026ac2c4 2022-08-20 stsp static int	 sockets_accept_reserve(int, struct sockaddr *, socklen_t *,
 81 026ac2c4 2022-08-20 stsp 		    int, volatile int *);
 82 a596b957 2022-07-14 tracey 
 83 026ac2c4 2022-08-20 stsp static struct socket *sockets_conf_new_socket_unix(struct gotwebd *,
 84 026ac2c4 2022-08-20 stsp 		    struct server *, int);
 85 026ac2c4 2022-08-20 stsp static struct socket *sockets_conf_new_socket_fcgi(struct gotwebd *,
 86 026ac2c4 2022-08-20 stsp 		    struct server *, int, struct address *);
 87 a596b957 2022-07-14 tracey 
 88 a596b957 2022-07-14 tracey int cgi_inflight = 0;
 89 a596b957 2022-07-14 tracey 
 90 a596b957 2022-07-14 tracey static struct privsep_proc procs[] = {
 91 a596b957 2022-07-14 tracey 	{ "gotwebd",	PROC_GOTWEBD,	sockets_dispatch_gotwebd  },
 92 a596b957 2022-07-14 tracey };
 93 a596b957 2022-07-14 tracey 
 94 a596b957 2022-07-14 tracey void
 95 a596b957 2022-07-14 tracey sockets(struct privsep *ps, struct privsep_proc *p)
 96 a596b957 2022-07-14 tracey {
 97 a596b957 2022-07-14 tracey 	proc_run(ps, p, procs, nitems(procs), sockets_run, NULL);
 98 a596b957 2022-07-14 tracey }
 99 a596b957 2022-07-14 tracey 
100 026ac2c4 2022-08-20 stsp static void
101 a596b957 2022-07-14 tracey sockets_run(struct privsep *ps, struct privsep_proc *p, void *arg)
102 a596b957 2022-07-14 tracey {
103 a596b957 2022-07-14 tracey 	if (config_init(ps->ps_env) == -1)
104 a596b957 2022-07-14 tracey 		fatal("failed to initialize configuration");
105 a596b957 2022-07-14 tracey 
106 a596b957 2022-07-14 tracey 	p->p_shutdown = sockets_shutdown;
107 a596b957 2022-07-14 tracey 
108 a596b957 2022-07-14 tracey 	sockets_rlimit(-1);
109 a596b957 2022-07-14 tracey 
110 a596b957 2022-07-14 tracey 	signal_del(&ps->ps_evsigchld);
111 a596b957 2022-07-14 tracey 	signal_set(&ps->ps_evsigchld, SIGCHLD, sockets_sighdlr, ps);
112 a596b957 2022-07-14 tracey 	signal_add(&ps->ps_evsigchld, NULL);
113 a596b957 2022-07-14 tracey 
114 a596b957 2022-07-14 tracey #ifndef PROFILE
115 a596b957 2022-07-14 tracey 	if (pledge("stdio rpath wpath cpath inet recvfd proc exec sendfd",
116 a596b957 2022-07-14 tracey 	    NULL) == -1)
117 a596b957 2022-07-14 tracey 		fatal("pledge");
118 a596b957 2022-07-14 tracey #endif
119 a596b957 2022-07-14 tracey }
120 a596b957 2022-07-14 tracey 
121 a596b957 2022-07-14 tracey void
122 a596b957 2022-07-14 tracey sockets_parse_sockets(struct gotwebd *env)
123 a596b957 2022-07-14 tracey {
124 a596b957 2022-07-14 tracey 	struct server *srv;
125 610dd8c9 2022-08-19 stsp 	struct address *a;
126 4fcc9f74 2022-08-16 stsp 	struct socket *new_sock = NULL;
127 610dd8c9 2022-08-19 stsp 	int sock_id = 1;
128 a596b957 2022-07-14 tracey 
129 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH(srv, &env->servers, entry) {
130 a596b957 2022-07-14 tracey 		if (srv->unix_socket) {
131 610dd8c9 2022-08-19 stsp 			new_sock = sockets_conf_new_socket_unix(env, srv,
132 610dd8c9 2022-08-19 stsp 			    sock_id);
133 4fcc9f74 2022-08-16 stsp 			if (new_sock) {
134 610dd8c9 2022-08-19 stsp 				sock_id++;
135 4fcc9f74 2022-08-16 stsp 				TAILQ_INSERT_TAIL(&env->sockets, new_sock,
136 4fcc9f74 2022-08-16 stsp 				    entry);
137 a596b957 2022-07-14 tracey 			}
138 610dd8c9 2022-08-19 stsp 		}
139 a596b957 2022-07-14 tracey 
140 610dd8c9 2022-08-19 stsp 		if (srv->fcgi_socket) {
141 610dd8c9 2022-08-19 stsp 			if (TAILQ_EMPTY(&srv->al)) {
142 610dd8c9 2022-08-19 stsp 				fatalx("%s: server %s has no IP addresses to "
143 610dd8c9 2022-08-19 stsp 				    "listen for FCGI connections", __func__,
144 610dd8c9 2022-08-19 stsp 				    srv->name);
145 4fcc9f74 2022-08-16 stsp 			}
146 610dd8c9 2022-08-19 stsp 			TAILQ_FOREACH(a, &srv->al, entry) {
147 610dd8c9 2022-08-19 stsp 				if (a->ss.ss_family != AF_INET &&
148 610dd8c9 2022-08-19 stsp 				    a->ss.ss_family != AF_INET6)
149 610dd8c9 2022-08-19 stsp 					continue;
150 610dd8c9 2022-08-19 stsp 				new_sock = sockets_conf_new_socket_fcgi(env,
151 610dd8c9 2022-08-19 stsp 				    srv, sock_id, a);
152 610dd8c9 2022-08-19 stsp 				if (new_sock) {
153 610dd8c9 2022-08-19 stsp 					sock_id++;
154 610dd8c9 2022-08-19 stsp 					TAILQ_INSERT_TAIL(&env->sockets,
155 610dd8c9 2022-08-19 stsp 					    new_sock, entry);
156 610dd8c9 2022-08-19 stsp 				}
157 a596b957 2022-07-14 tracey 			}
158 a596b957 2022-07-14 tracey 		}
159 a596b957 2022-07-14 tracey 	}
160 a596b957 2022-07-14 tracey }
161 a596b957 2022-07-14 tracey 
162 026ac2c4 2022-08-20 stsp static struct socket *
163 610dd8c9 2022-08-19 stsp sockets_conf_new_socket_unix(struct gotwebd *env, struct server *srv, int id)
164 a596b957 2022-07-14 tracey {
165 a596b957 2022-07-14 tracey 	struct socket *sock;
166 a596b957 2022-07-14 tracey 	int n;
167 a596b957 2022-07-14 tracey 
168 a596b957 2022-07-14 tracey 	if ((sock = calloc(1, sizeof(*sock))) == NULL)
169 a596b957 2022-07-14 tracey 		fatalx("%s: calloc", __func__);
170 a596b957 2022-07-14 tracey 
171 a596b957 2022-07-14 tracey 	sock->conf.id = id;
172 a596b957 2022-07-14 tracey 	sock->fd = -1;
173 610dd8c9 2022-08-19 stsp 	sock->conf.af_type = AF_UNIX;
174 a596b957 2022-07-14 tracey 
175 610dd8c9 2022-08-19 stsp 	if (strlcpy(sock->conf.unix_socket_name,
176 610dd8c9 2022-08-19 stsp 	    srv->unix_socket_name,
177 610dd8c9 2022-08-19 stsp 	    sizeof(sock->conf.unix_socket_name)) >=
178 610dd8c9 2022-08-19 stsp 	    sizeof(sock->conf.unix_socket_name)) {
179 610dd8c9 2022-08-19 stsp 		free(sock);
180 610dd8c9 2022-08-19 stsp 		fatalx("%s: strlcpy", __func__);
181 4fcc9f74 2022-08-16 stsp 	}
182 a596b957 2022-07-14 tracey 
183 a596b957 2022-07-14 tracey 	n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
184 a596b957 2022-07-14 tracey 	    srv->name);
185 438d0cc3 2022-08-16 op 	if (n < 0 || (size_t)n >= GOTWEBD_MAXTEXT) {
186 a596b957 2022-07-14 tracey 		free(sock);
187 a596b957 2022-07-14 tracey 		fatalx("%s: snprintf", __func__);
188 a596b957 2022-07-14 tracey 	}
189 a596b957 2022-07-14 tracey 
190 a596b957 2022-07-14 tracey 	if (strlcpy(sock->conf.srv_name, srv->name,
191 a596b957 2022-07-14 tracey 	    sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
192 a596b957 2022-07-14 tracey 		free(sock);
193 a596b957 2022-07-14 tracey 		fatalx("%s: strlcpy", __func__);
194 a596b957 2022-07-14 tracey 	}
195 a596b957 2022-07-14 tracey 
196 610dd8c9 2022-08-19 stsp 	return sock;
197 610dd8c9 2022-08-19 stsp }
198 4fcc9f74 2022-08-16 stsp 
199 026ac2c4 2022-08-20 stsp static struct socket *
200 610dd8c9 2022-08-19 stsp sockets_conf_new_socket_fcgi(struct gotwebd *env, struct server *srv, int id,
201 610dd8c9 2022-08-19 stsp     struct address *a)
202 610dd8c9 2022-08-19 stsp {
203 610dd8c9 2022-08-19 stsp 	struct socket *sock;
204 610dd8c9 2022-08-19 stsp 	struct address *acp;
205 610dd8c9 2022-08-19 stsp 	int n;
206 a596b957 2022-07-14 tracey 
207 610dd8c9 2022-08-19 stsp 	if ((sock = calloc(1, sizeof(*sock))) == NULL)
208 610dd8c9 2022-08-19 stsp 		fatalx("%s: calloc", __func__);
209 4fcc9f74 2022-08-16 stsp 
210 610dd8c9 2022-08-19 stsp 	sock->conf.id = id;
211 610dd8c9 2022-08-19 stsp 	sock->fd = -1;
212 610dd8c9 2022-08-19 stsp 	sock->conf.af_type = a->ss.ss_family;
213 610dd8c9 2022-08-19 stsp 
214 67d8de2a 2022-08-29 stsp 	sock->conf.fcgi_socket_port = a->port;
215 610dd8c9 2022-08-19 stsp 
216 610dd8c9 2022-08-19 stsp 	n = snprintf(sock->conf.name, GOTWEBD_MAXTEXT, "%s_parent",
217 610dd8c9 2022-08-19 stsp 	    srv->name);
218 610dd8c9 2022-08-19 stsp 	if (n < 0 || (size_t)n >= GOTWEBD_MAXTEXT) {
219 4fcc9f74 2022-08-16 stsp 		free(sock);
220 610dd8c9 2022-08-19 stsp 		fatalx("%s: snprintf", __func__);
221 4fcc9f74 2022-08-16 stsp 	}
222 4fcc9f74 2022-08-16 stsp 
223 610dd8c9 2022-08-19 stsp 	if (strlcpy(sock->conf.srv_name, srv->name,
224 610dd8c9 2022-08-19 stsp 	    sizeof(sock->conf.srv_name)) >= sizeof(sock->conf.srv_name)) {
225 610dd8c9 2022-08-19 stsp 		free(sock);
226 610dd8c9 2022-08-19 stsp 		fatalx("%s: strlcpy", __func__);
227 610dd8c9 2022-08-19 stsp 	}
228 610dd8c9 2022-08-19 stsp 
229 610dd8c9 2022-08-19 stsp 	acp = &sock->conf.addr;
230 610dd8c9 2022-08-19 stsp 
231 610dd8c9 2022-08-19 stsp 	memcpy(&acp->ss, &a->ss, sizeof(acp->ss));
232 610dd8c9 2022-08-19 stsp 	acp->ipproto = a->ipproto;
233 610dd8c9 2022-08-19 stsp 	acp->port = a->port;
234 610dd8c9 2022-08-19 stsp 	if (strlen(a->ifname) != 0) {
235 610dd8c9 2022-08-19 stsp 		if (strlcpy(acp->ifname, a->ifname,
236 610dd8c9 2022-08-19 stsp 		    sizeof(acp->ifname)) >= sizeof(acp->ifname)) {
237 610dd8c9 2022-08-19 stsp 			fatalx("%s: interface name truncated",
238 610dd8c9 2022-08-19 stsp 			    __func__);
239 610dd8c9 2022-08-19 stsp 		}
240 610dd8c9 2022-08-19 stsp 	}
241 610dd8c9 2022-08-19 stsp 
242 a596b957 2022-07-14 tracey 	return (sock);
243 a596b957 2022-07-14 tracey }
244 a596b957 2022-07-14 tracey 
245 026ac2c4 2022-08-20 stsp static void
246 a596b957 2022-07-14 tracey sockets_launch(void)
247 a596b957 2022-07-14 tracey {
248 a596b957 2022-07-14 tracey 	struct socket *sock;
249 a596b957 2022-07-14 tracey 
250 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH(sock, &gotwebd_env->sockets, entry) {
251 a596b957 2022-07-14 tracey 		log_debug("%s: configuring socket %d (%d)", __func__,
252 a596b957 2022-07-14 tracey 		    sock->conf.id, sock->fd);
253 a596b957 2022-07-14 tracey 
254 a596b957 2022-07-14 tracey 		event_set(&sock->ev, sock->fd, EV_READ | EV_PERSIST,
255 a596b957 2022-07-14 tracey 		    sockets_socket_accept, sock);
256 a596b957 2022-07-14 tracey 
257 a596b957 2022-07-14 tracey 		if (event_add(&sock->ev, NULL))
258 a596b957 2022-07-14 tracey 			fatalx("event add sock");
259 a596b957 2022-07-14 tracey 
260 a596b957 2022-07-14 tracey 		evtimer_set(&sock->pause, sockets_accept_paused, sock);
261 a596b957 2022-07-14 tracey 
262 a596b957 2022-07-14 tracey 		log_debug("%s: running socket listener %d", __func__,
263 a596b957 2022-07-14 tracey 		    sock->conf.id);
264 a596b957 2022-07-14 tracey 	}
265 a596b957 2022-07-14 tracey }
266 a596b957 2022-07-14 tracey 
267 026ac2c4 2022-08-20 stsp static void
268 a596b957 2022-07-14 tracey sockets_purge(struct gotwebd *env)
269 a596b957 2022-07-14 tracey {
270 a596b957 2022-07-14 tracey 	struct socket *sock, *tsock;
271 a596b957 2022-07-14 tracey 
272 a596b957 2022-07-14 tracey 	/* shutdown and remove sockets */
273 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH_SAFE(sock, &env->sockets, entry, tsock) {
274 a596b957 2022-07-14 tracey 		if (event_initialized(&sock->ev))
275 a596b957 2022-07-14 tracey 			event_del(&sock->ev);
276 a596b957 2022-07-14 tracey 		if (evtimer_initialized(&sock->evt))
277 a596b957 2022-07-14 tracey 			evtimer_del(&sock->evt);
278 a596b957 2022-07-14 tracey 		if (evtimer_initialized(&sock->pause))
279 a596b957 2022-07-14 tracey 			evtimer_del(&sock->pause);
280 a596b957 2022-07-14 tracey 		if (sock->fd != -1)
281 a596b957 2022-07-14 tracey 			close(sock->fd);
282 2ad48e9a 2022-08-16 stsp 		TAILQ_REMOVE(&env->sockets, sock, entry);
283 a596b957 2022-07-14 tracey 	}
284 a596b957 2022-07-14 tracey }
285 a596b957 2022-07-14 tracey 
286 026ac2c4 2022-08-20 stsp static int
287 a596b957 2022-07-14 tracey sockets_dispatch_gotwebd(int fd, struct privsep_proc *p, struct imsg *imsg)
288 a596b957 2022-07-14 tracey {
289 a596b957 2022-07-14 tracey 	struct privsep *ps = p->p_ps;
290 a596b957 2022-07-14 tracey 	int res = 0, cmd = 0, verbose;
291 a596b957 2022-07-14 tracey 
292 a596b957 2022-07-14 tracey 	switch (imsg->hdr.type) {
293 a596b957 2022-07-14 tracey 	case IMSG_CFG_SRV:
294 a596b957 2022-07-14 tracey 		config_getserver(gotwebd_env, imsg);
295 a596b957 2022-07-14 tracey 		break;
296 a596b957 2022-07-14 tracey 	case IMSG_CFG_SOCK:
297 a596b957 2022-07-14 tracey 		config_getsock(gotwebd_env, imsg);
298 a596b957 2022-07-14 tracey 		break;
299 a596b957 2022-07-14 tracey 	case IMSG_CFG_FD:
300 a596b957 2022-07-14 tracey 		config_getfd(gotwebd_env, imsg);
301 a596b957 2022-07-14 tracey 		break;
302 a596b957 2022-07-14 tracey 	case IMSG_CFG_DONE:
303 a596b957 2022-07-14 tracey 		config_getcfg(gotwebd_env, imsg);
304 a596b957 2022-07-14 tracey 		break;
305 a596b957 2022-07-14 tracey 	case IMSG_CTL_START:
306 a596b957 2022-07-14 tracey 		sockets_launch();
307 a596b957 2022-07-14 tracey 		break;
308 a596b957 2022-07-14 tracey 	case IMSG_CTL_VERBOSE:
309 a596b957 2022-07-14 tracey 		IMSG_SIZE_CHECK(imsg, &verbose);
310 a596b957 2022-07-14 tracey 		memcpy(&verbose, imsg->data, sizeof(verbose));
311 a596b957 2022-07-14 tracey 		log_setverbose(verbose);
312 a596b957 2022-07-14 tracey 		break;
313 a596b957 2022-07-14 tracey 	default:
314 a596b957 2022-07-14 tracey 		return -1;
315 a596b957 2022-07-14 tracey 	}
316 a596b957 2022-07-14 tracey 
317 a596b957 2022-07-14 tracey 	switch (cmd) {
318 a596b957 2022-07-14 tracey 	case 0:
319 a596b957 2022-07-14 tracey 		break;
320 a596b957 2022-07-14 tracey 	default:
321 a596b957 2022-07-14 tracey 		if (proc_compose_imsg(ps, PROC_GOTWEBD, -1, cmd,
322 a596b957 2022-07-14 tracey 		    imsg->hdr.peerid, -1, &res, sizeof(res)) == -1)
323 a596b957 2022-07-14 tracey 			return -1;
324 a596b957 2022-07-14 tracey 		break;
325 a596b957 2022-07-14 tracey 	}
326 a596b957 2022-07-14 tracey 
327 a596b957 2022-07-14 tracey 	return 0;
328 a596b957 2022-07-14 tracey }
329 a596b957 2022-07-14 tracey 
330 026ac2c4 2022-08-20 stsp static void
331 a596b957 2022-07-14 tracey sockets_sighdlr(int sig, short event, void *arg)
332 a596b957 2022-07-14 tracey {
333 a596b957 2022-07-14 tracey 	switch (sig) {
334 a596b957 2022-07-14 tracey 	case SIGHUP:
335 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGHUP", __func__);
336 a596b957 2022-07-14 tracey 		break;
337 a596b957 2022-07-14 tracey 	case SIGPIPE:
338 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGPIPE", __func__);
339 a596b957 2022-07-14 tracey 		break;
340 a596b957 2022-07-14 tracey 	case SIGUSR1:
341 a596b957 2022-07-14 tracey 		log_info("%s: ignoring SIGUSR1", __func__);
342 a596b957 2022-07-14 tracey 		break;
343 a596b957 2022-07-14 tracey 	case SIGCHLD:
344 a596b957 2022-07-14 tracey 		break;
345 a596b957 2022-07-14 tracey 	default:
346 a596b957 2022-07-14 tracey 		log_info("SIGNAL: %d", sig);
347 a596b957 2022-07-14 tracey 		fatalx("unexpected signal");
348 a596b957 2022-07-14 tracey 	}
349 a596b957 2022-07-14 tracey }
350 a596b957 2022-07-14 tracey 
351 a596b957 2022-07-14 tracey void
352 a596b957 2022-07-14 tracey sockets_shutdown(void)
353 a596b957 2022-07-14 tracey {
354 a596b957 2022-07-14 tracey 	struct server *srv, *tsrv;
355 a596b957 2022-07-14 tracey 	struct socket *sock, *tsock;
356 b5c757f5 2022-09-01 stsp 	int i;
357 a596b957 2022-07-14 tracey 
358 a596b957 2022-07-14 tracey 	sockets_purge(gotwebd_env);
359 a596b957 2022-07-14 tracey 
360 a596b957 2022-07-14 tracey 	/* clean sockets */
361 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH_SAFE(sock, &gotwebd_env->sockets, entry, tsock) {
362 2ad48e9a 2022-08-16 stsp 		TAILQ_REMOVE(&gotwebd_env->sockets, sock, entry);
363 a596b957 2022-07-14 tracey 		close(sock->fd);
364 a596b957 2022-07-14 tracey 		free(sock);
365 a596b957 2022-07-14 tracey 	}
366 a596b957 2022-07-14 tracey 
367 a596b957 2022-07-14 tracey 	/* clean servers */
368 b5c757f5 2022-09-01 stsp 	TAILQ_FOREACH_SAFE(srv, &gotwebd_env->servers, entry, tsrv) {
369 b5c757f5 2022-09-01 stsp 		for (i = 0; i < srv->ncached_repos; i++)
370 b5c757f5 2022-09-01 stsp 			got_repo_close(srv->cached_repos[i].repo);
371 a596b957 2022-07-14 tracey 		free(srv);
372 b5c757f5 2022-09-01 stsp 	}
373 a596b957 2022-07-14 tracey 
374 a596b957 2022-07-14 tracey 	free(gotwebd_env);
375 a596b957 2022-07-14 tracey }
376 a596b957 2022-07-14 tracey 
377 a596b957 2022-07-14 tracey int
378 a596b957 2022-07-14 tracey sockets_privinit(struct gotwebd *env, struct socket *sock)
379 a596b957 2022-07-14 tracey {
380 a596b957 2022-07-14 tracey 	struct privsep *ps = env->gotwebd_ps;
381 a596b957 2022-07-14 tracey 
382 4fcc9f74 2022-08-16 stsp 	if (sock->conf.af_type == AF_UNIX) {
383 a596b957 2022-07-14 tracey 		log_debug("%s: initializing unix socket %s", __func__,
384 a596b957 2022-07-14 tracey 		    sock->conf.unix_socket_name);
385 a596b957 2022-07-14 tracey 		sock->fd = sockets_unix_socket_listen(ps, sock);
386 a596b957 2022-07-14 tracey 		if (sock->fd == -1) {
387 a596b957 2022-07-14 tracey 			log_warnx("%s: create unix socket failed", __func__);
388 a596b957 2022-07-14 tracey 			return -1;
389 a596b957 2022-07-14 tracey 		}
390 a596b957 2022-07-14 tracey 	}
391 a596b957 2022-07-14 tracey 
392 4fcc9f74 2022-08-16 stsp 	if (sock->conf.af_type == AF_INET || sock->conf.af_type == AF_INET6) {
393 4fcc9f74 2022-08-16 stsp 		log_debug("%s: initializing %s FCGI socket on port %d for %s",
394 4fcc9f74 2022-08-16 stsp 		    __func__, sock->conf.af_type == AF_INET ? "inet" : "inet6",
395 4fcc9f74 2022-08-16 stsp 		    sock->conf.fcgi_socket_port, sock->conf.name);
396 610dd8c9 2022-08-19 stsp 		sock->fd = sockets_create_socket(&sock->conf.addr,
397 a596b957 2022-07-14 tracey 		    sock->conf.fcgi_socket_port);
398 a596b957 2022-07-14 tracey 		if (sock->fd == -1) {
399 610dd8c9 2022-08-19 stsp 			log_warnx("%s: create FCGI socket failed", __func__);
400 a596b957 2022-07-14 tracey 			return -1;
401 a596b957 2022-07-14 tracey 		}
402 a596b957 2022-07-14 tracey 	}
403 a596b957 2022-07-14 tracey 
404 a596b957 2022-07-14 tracey 	return 0;
405 a596b957 2022-07-14 tracey }
406 a596b957 2022-07-14 tracey 
407 026ac2c4 2022-08-20 stsp static int
408 a596b957 2022-07-14 tracey sockets_unix_socket_listen(struct privsep *ps, struct socket *sock)
409 a596b957 2022-07-14 tracey {
410 a596b957 2022-07-14 tracey 	struct gotwebd *env = ps->ps_env;
411 a596b957 2022-07-14 tracey 	struct sockaddr_un sun;
412 a596b957 2022-07-14 tracey 	struct socket *tsock;
413 a596b957 2022-07-14 tracey 	int u_fd = -1;
414 a596b957 2022-07-14 tracey 	mode_t old_umask, mode;
415 a596b957 2022-07-14 tracey 
416 2ad48e9a 2022-08-16 stsp 	TAILQ_FOREACH(tsock, &env->sockets, entry) {
417 a596b957 2022-07-14 tracey 		if (strcmp(tsock->conf.unix_socket_name,
418 a596b957 2022-07-14 tracey 		    sock->conf.unix_socket_name) == 0 &&
419 a596b957 2022-07-14 tracey 		    tsock->fd != -1)
420 a596b957 2022-07-14 tracey 			return (tsock->fd);
421 a596b957 2022-07-14 tracey 	}
422 a596b957 2022-07-14 tracey 
423 a596b957 2022-07-14 tracey 	u_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_NONBLOCK| SOCK_CLOEXEC, 0);
424 a596b957 2022-07-14 tracey 	if (u_fd == -1) {
425 a596b957 2022-07-14 tracey 		log_warn("%s: socket", __func__);
426 a596b957 2022-07-14 tracey 		return -1;
427 a596b957 2022-07-14 tracey 	}
428 a596b957 2022-07-14 tracey 
429 a596b957 2022-07-14 tracey 	sun.sun_family = AF_UNIX;
430 a596b957 2022-07-14 tracey 	if (strlcpy(sun.sun_path, sock->conf.unix_socket_name,
431 a596b957 2022-07-14 tracey 	    sizeof(sun.sun_path)) >= sizeof(sun.sun_path)) {
432 a596b957 2022-07-14 tracey 		log_warn("%s: %s name too long", __func__,
433 a596b957 2022-07-14 tracey 		    sock->conf.unix_socket_name);
434 a596b957 2022-07-14 tracey 		close(u_fd);
435 a596b957 2022-07-14 tracey 		return -1;
436 a596b957 2022-07-14 tracey 	}
437 a596b957 2022-07-14 tracey 
438 a596b957 2022-07-14 tracey 	if (unlink(sock->conf.unix_socket_name) == -1) {
439 a596b957 2022-07-14 tracey 		if (errno != ENOENT) {
440 a596b957 2022-07-14 tracey 			log_warn("%s: unlink %s", __func__,
441 a596b957 2022-07-14 tracey 			    sock->conf.unix_socket_name);
442 a596b957 2022-07-14 tracey 			close(u_fd);
443 a596b957 2022-07-14 tracey 			return -1;
444 a596b957 2022-07-14 tracey 		}
445 a596b957 2022-07-14 tracey 	}
446 a596b957 2022-07-14 tracey 
447 a596b957 2022-07-14 tracey 	old_umask = umask(S_IXUSR|S_IXGRP|S_IWOTH|S_IROTH|S_IXOTH);
448 a596b957 2022-07-14 tracey 	mode = S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP;
449 a596b957 2022-07-14 tracey 
450 a596b957 2022-07-14 tracey 	if (bind(u_fd, (struct sockaddr *)&sun, sizeof(sun)) == -1) {
451 a596b957 2022-07-14 tracey 		log_warn("%s: bind: %s", __func__, sock->conf.unix_socket_name);
452 a596b957 2022-07-14 tracey 		close(u_fd);
453 a596b957 2022-07-14 tracey 		(void)umask(old_umask);
454 a596b957 2022-07-14 tracey 		return -1;
455 a596b957 2022-07-14 tracey 	}
456 a596b957 2022-07-14 tracey 
457 a596b957 2022-07-14 tracey 	(void)umask(old_umask);
458 a596b957 2022-07-14 tracey 
459 a596b957 2022-07-14 tracey 	if (chmod(sock->conf.unix_socket_name, mode) == -1) {
460 a596b957 2022-07-14 tracey 		log_warn("%s: chmod", __func__);
461 a596b957 2022-07-14 tracey 		close(u_fd);
462 a596b957 2022-07-14 tracey 		(void)unlink(sock->conf.unix_socket_name);
463 a596b957 2022-07-14 tracey 		return -1;
464 a596b957 2022-07-14 tracey 	}
465 a596b957 2022-07-14 tracey 
466 a596b957 2022-07-14 tracey 	if (chown(sock->conf.unix_socket_name, ps->ps_pw->pw_uid,
467 a596b957 2022-07-14 tracey 	    ps->ps_pw->pw_gid) == -1) {
468 a596b957 2022-07-14 tracey 		log_warn("%s: chown", __func__);
469 a596b957 2022-07-14 tracey 		close(u_fd);
470 a596b957 2022-07-14 tracey 		(void)unlink(sock->conf.unix_socket_name);
471 a596b957 2022-07-14 tracey 		return -1;
472 a596b957 2022-07-14 tracey 	}
473 a596b957 2022-07-14 tracey 
474 a596b957 2022-07-14 tracey 	if (listen(u_fd, SOCKS_BACKLOG) == -1) {
475 a596b957 2022-07-14 tracey 		log_warn("%s: listen", __func__);
476 a596b957 2022-07-14 tracey 		return -1;
477 a596b957 2022-07-14 tracey 	}
478 a596b957 2022-07-14 tracey 
479 a596b957 2022-07-14 tracey 	return u_fd;
480 a596b957 2022-07-14 tracey }
481 a596b957 2022-07-14 tracey 
482 026ac2c4 2022-08-20 stsp static int
483 610dd8c9 2022-08-19 stsp sockets_create_socket(struct address *a, in_port_t port)
484 a596b957 2022-07-14 tracey {
485 a596b957 2022-07-14 tracey 	struct addrinfo hints;
486 a596b957 2022-07-14 tracey 	int fd = -1, o_val = 1, flags;
487 a596b957 2022-07-14 tracey 
488 a596b957 2022-07-14 tracey 	memset(&hints, 0, sizeof(hints));
489 a596b957 2022-07-14 tracey 	hints.ai_family = AF_UNSPEC;
490 a596b957 2022-07-14 tracey 	hints.ai_socktype = SOCK_STREAM;
491 a596b957 2022-07-14 tracey 	hints.ai_flags |= AI_PASSIVE;
492 a596b957 2022-07-14 tracey 
493 610dd8c9 2022-08-19 stsp 	switch (a->ss.ss_family) {
494 610dd8c9 2022-08-19 stsp 	case AF_INET:
495 859aa9f4 2022-08-19 stsp 		((struct sockaddr_in *)(&a->ss))->sin_port = htons(port);
496 610dd8c9 2022-08-19 stsp 		break;
497 610dd8c9 2022-08-19 stsp 	case AF_INET6:
498 859aa9f4 2022-08-19 stsp 		((struct sockaddr_in6 *)(&a->ss))->sin6_port = htons(port);
499 610dd8c9 2022-08-19 stsp 		break;
500 610dd8c9 2022-08-19 stsp 	default:
501 610dd8c9 2022-08-19 stsp 		log_warnx("%s: unknown address family", __func__);
502 610dd8c9 2022-08-19 stsp 		return -1;
503 610dd8c9 2022-08-19 stsp 	}
504 a596b957 2022-07-14 tracey 
505 610dd8c9 2022-08-19 stsp 	fd = socket(a->ss.ss_family, hints.ai_socktype, a->ipproto);
506 610dd8c9 2022-08-19 stsp 	if (fd == -1)
507 610dd8c9 2022-08-19 stsp 		return -1;
508 a596b957 2022-07-14 tracey 
509 610dd8c9 2022-08-19 stsp 	log_debug("%s: opened socket (%d) for %s", __func__,
510 610dd8c9 2022-08-19 stsp 	    fd, a->ifname);
511 a596b957 2022-07-14 tracey 
512 610dd8c9 2022-08-19 stsp 	if (setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &o_val,
513 610dd8c9 2022-08-19 stsp 	    sizeof(int)) == -1) {
514 610dd8c9 2022-08-19 stsp 		log_warn("%s: setsockopt error", __func__);
515 610dd8c9 2022-08-19 stsp 		close(fd);
516 610dd8c9 2022-08-19 stsp 		return -1;
517 610dd8c9 2022-08-19 stsp 	}
518 a596b957 2022-07-14 tracey 
519 610dd8c9 2022-08-19 stsp 	/* non-blocking */
520 610dd8c9 2022-08-19 stsp 	flags = fcntl(fd, F_GETFL);
521 610dd8c9 2022-08-19 stsp 	flags |= O_NONBLOCK;
522 610dd8c9 2022-08-19 stsp 	if (fcntl(fd, F_SETFL, flags) == -1) {
523 610dd8c9 2022-08-19 stsp 		log_info("%s: could not enable non-blocking I/O", __func__);
524 610dd8c9 2022-08-19 stsp 		close(fd);
525 610dd8c9 2022-08-19 stsp 		return -1;
526 610dd8c9 2022-08-19 stsp 	}
527 a596b957 2022-07-14 tracey 
528 610dd8c9 2022-08-19 stsp 	if (bind(fd, (struct sockaddr *)&a->ss, a->ss.ss_len) == -1) {
529 610dd8c9 2022-08-19 stsp 		close(fd);
530 610dd8c9 2022-08-19 stsp 		log_info("%s: can't bind to port %d", __func__,
531 610dd8c9 2022-08-19 stsp 		    ntohs(port));
532 610dd8c9 2022-08-19 stsp 		return -1;
533 a596b957 2022-07-14 tracey 	}
534 a596b957 2022-07-14 tracey 
535 610dd8c9 2022-08-19 stsp 	if (listen(fd, SOMAXCONN) == -1) {
536 610dd8c9 2022-08-19 stsp 		log_warn("%s, unable to listen on socket", __func__);
537 610dd8c9 2022-08-19 stsp 		close(fd);
538 610dd8c9 2022-08-19 stsp 		return -1;
539 610dd8c9 2022-08-19 stsp 	}
540 610dd8c9 2022-08-19 stsp 
541 a596b957 2022-07-14 tracey 	return (fd);
542 a596b957 2022-07-14 tracey }
543 a596b957 2022-07-14 tracey 
544 026ac2c4 2022-08-20 stsp static int
545 a596b957 2022-07-14 tracey sockets_accept_reserve(int sockfd, struct sockaddr *addr, socklen_t *addrlen,
546 a596b957 2022-07-14 tracey     int reserve, volatile int *counter)
547 a596b957 2022-07-14 tracey {
548 a596b957 2022-07-14 tracey 	int ret;
549 a596b957 2022-07-14 tracey 
550 a596b957 2022-07-14 tracey 	if (getdtablecount() + reserve +
551 a596b957 2022-07-14 tracey 	    ((*counter + 1) * FD_NEEDED) >= getdtablesize()) {
552 a596b957 2022-07-14 tracey 		log_debug("inflight fds exceeded");
553 a596b957 2022-07-14 tracey 		errno = EMFILE;
554 a596b957 2022-07-14 tracey 		return -1;
555 a596b957 2022-07-14 tracey 	}
556 a596b957 2022-07-14 tracey 
557 a596b957 2022-07-14 tracey 	if ((ret = accept4(sockfd, addr, addrlen,
558 a596b957 2022-07-14 tracey 	    SOCK_NONBLOCK | SOCK_CLOEXEC)) > -1) {
559 a596b957 2022-07-14 tracey 		(*counter)++;
560 a596b957 2022-07-14 tracey 		log_debug("inflight incremented, now %d", *counter);
561 a596b957 2022-07-14 tracey 	}
562 a596b957 2022-07-14 tracey 
563 a596b957 2022-07-14 tracey 	return ret;
564 a596b957 2022-07-14 tracey }
565 a596b957 2022-07-14 tracey 
566 026ac2c4 2022-08-20 stsp static void
567 a596b957 2022-07-14 tracey sockets_accept_paused(int fd, short events, void *arg)
568 a596b957 2022-07-14 tracey {
569 a596b957 2022-07-14 tracey 	struct socket *sock = (struct socket *)arg;
570 a596b957 2022-07-14 tracey 
571 a596b957 2022-07-14 tracey 	event_add(&sock->ev, NULL);
572 a596b957 2022-07-14 tracey }
573 a596b957 2022-07-14 tracey 
574 a596b957 2022-07-14 tracey void
575 a596b957 2022-07-14 tracey sockets_socket_accept(int fd, short event, void *arg)
576 a596b957 2022-07-14 tracey {
577 a596b957 2022-07-14 tracey 	struct socket *sock = (struct socket *)arg;
578 a596b957 2022-07-14 tracey 	struct sockaddr_storage ss;
579 a596b957 2022-07-14 tracey 	struct timeval backoff;
580 a596b957 2022-07-14 tracey 	struct request *c = NULL;
581 a596b957 2022-07-14 tracey 	socklen_t len;
582 a596b957 2022-07-14 tracey 	int s;
583 a596b957 2022-07-14 tracey 
584 a596b957 2022-07-14 tracey 	backoff.tv_sec = 1;
585 a596b957 2022-07-14 tracey 	backoff.tv_usec = 0;
586 a596b957 2022-07-14 tracey 
587 a596b957 2022-07-14 tracey 	event_add(&sock->ev, NULL);
588 a596b957 2022-07-14 tracey 	if (event & EV_TIMEOUT)
589 a596b957 2022-07-14 tracey 		return;
590 a596b957 2022-07-14 tracey 
591 a596b957 2022-07-14 tracey 	len = sizeof(ss);
592 a596b957 2022-07-14 tracey 
593 a596b957 2022-07-14 tracey 	s = sockets_accept_reserve(fd, (struct sockaddr *)&ss, &len,
594 a596b957 2022-07-14 tracey 	    FD_RESERVE, &cgi_inflight);
595 a596b957 2022-07-14 tracey 
596 a596b957 2022-07-14 tracey 	if (s == -1) {
597 a596b957 2022-07-14 tracey 		switch (errno) {
598 a596b957 2022-07-14 tracey 		case EINTR:
599 a596b957 2022-07-14 tracey 		case EWOULDBLOCK:
600 a596b957 2022-07-14 tracey 		case ECONNABORTED:
601 a596b957 2022-07-14 tracey 			return;
602 a596b957 2022-07-14 tracey 		case EMFILE:
603 a596b957 2022-07-14 tracey 		case ENFILE:
604 a596b957 2022-07-14 tracey 			event_del(&sock->ev);
605 a596b957 2022-07-14 tracey 			evtimer_add(&sock->pause, &backoff);
606 a596b957 2022-07-14 tracey 			return;
607 a596b957 2022-07-14 tracey 		default:
608 a596b957 2022-07-14 tracey 			log_warn("%s: accept", __func__);
609 a596b957 2022-07-14 tracey 		}
610 a596b957 2022-07-14 tracey 	}
611 a596b957 2022-07-14 tracey 
612 a596b957 2022-07-14 tracey 	if (client_cnt > GOTWEBD_MAXCLIENTS)
613 a596b957 2022-07-14 tracey 		goto err;
614 a596b957 2022-07-14 tracey 
615 a596b957 2022-07-14 tracey 	c = calloc(1, sizeof(struct request));
616 a596b957 2022-07-14 tracey 	if (c == NULL) {
617 ed619ca0 2022-12-14 op 		log_warn("%s", __func__);
618 ed619ca0 2022-12-14 op 		close(s);
619 ed619ca0 2022-12-14 op 		cgi_inflight--;
620 ed619ca0 2022-12-14 op 		return;
621 ed619ca0 2022-12-14 op 	}
622 ed619ca0 2022-12-14 op 
623 ed619ca0 2022-12-14 op 	c->tp = template(c, fcgi_puts, fcgi_putc);
624 ed619ca0 2022-12-14 op 	if (c->tp == NULL) {
625 a596b957 2022-07-14 tracey 		log_warn("%s", __func__);
626 a596b957 2022-07-14 tracey 		close(s);
627 a596b957 2022-07-14 tracey 		cgi_inflight--;
628 ed619ca0 2022-12-14 op 		free(c);
629 a596b957 2022-07-14 tracey 		return;
630 a596b957 2022-07-14 tracey 	}
631 a596b957 2022-07-14 tracey 
632 a596b957 2022-07-14 tracey 	c->fd = s;
633 a596b957 2022-07-14 tracey 	c->sock = sock;
634 a596b957 2022-07-14 tracey 	memcpy(c->priv_fd, sock->priv_fd, sizeof(c->priv_fd));
635 a596b957 2022-07-14 tracey 	c->buf_pos = 0;
636 a596b957 2022-07-14 tracey 	c->buf_len = 0;
637 a596b957 2022-07-14 tracey 	c->request_started = 0;
638 a596b957 2022-07-14 tracey 	c->sock->client_status = CLIENT_CONNECT;
639 a596b957 2022-07-14 tracey 
640 5add7f42 2023-03-10 op 	event_set(&c->ev, s, EV_READ|EV_PERSIST, fcgi_request, c);
641 a596b957 2022-07-14 tracey 	event_add(&c->ev, NULL);
642 a596b957 2022-07-14 tracey 
643 a596b957 2022-07-14 tracey 	evtimer_set(&c->tmo, fcgi_timeout, c);
644 a596b957 2022-07-14 tracey 	evtimer_add(&c->tmo, &timeout);
645 a596b957 2022-07-14 tracey 
646 a596b957 2022-07-14 tracey 	client_cnt++;
647 a596b957 2022-07-14 tracey 
648 a596b957 2022-07-14 tracey 	return;
649 a596b957 2022-07-14 tracey err:
650 a596b957 2022-07-14 tracey 	cgi_inflight--;
651 a596b957 2022-07-14 tracey 	close(s);
652 a596b957 2022-07-14 tracey 	if (c != NULL)
653 a596b957 2022-07-14 tracey 		free(c);
654 a596b957 2022-07-14 tracey }
655 a596b957 2022-07-14 tracey 
656 026ac2c4 2022-08-20 stsp static void
657 a596b957 2022-07-14 tracey sockets_rlimit(int maxfd)
658 a596b957 2022-07-14 tracey {
659 a596b957 2022-07-14 tracey 	struct rlimit rl;
660 a596b957 2022-07-14 tracey 
661 a596b957 2022-07-14 tracey 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
662 a596b957 2022-07-14 tracey 		fatal("%s: failed to get resource limit", __func__);
663 d6267a62 2022-07-17 naddy 	log_debug("%s: max open files %llu", __func__,
664 d6267a62 2022-07-17 naddy 	    (unsigned long long)rl.rlim_max);
665 a596b957 2022-07-14 tracey 
666 a596b957 2022-07-14 tracey 	/*
667 a596b957 2022-07-14 tracey 	 * Allow the maximum number of open file descriptors for this
668 a596b957 2022-07-14 tracey 	 * login class (which should be the class "daemon" by default).
669 a596b957 2022-07-14 tracey 	 */
670 a596b957 2022-07-14 tracey 	if (maxfd == -1)
671 a596b957 2022-07-14 tracey 		rl.rlim_cur = rl.rlim_max;
672 a596b957 2022-07-14 tracey 	else
673 a596b957 2022-07-14 tracey 		rl.rlim_cur = MAXIMUM(rl.rlim_max, (rlim_t)maxfd);
674 a596b957 2022-07-14 tracey 	if (setrlimit(RLIMIT_NOFILE, &rl) == -1)
675 a596b957 2022-07-14 tracey 		fatal("%s: failed to set resource limit", __func__);
676 d6267a62 2022-07-17 naddy }