1 /* vi: set sw=4 ts=4: */
2 /* $Slackware: inetd.c 1.79s 2001/02/06 13:18:00 volkerdi Exp $ */
3 /* $OpenBSD: inetd.c,v 1.79 2001/01/30 08:30:57 deraadt Exp $ */
4 /* $NetBSD: inetd.c,v 1.11 1996/02/22 11:14:41 mycroft Exp $ */
5 /* Busybox port by Vladimir Oleynik (C) 2001-2005 <dzo@simtreas.ru> */
7 * Copyright (c) 1983,1991 The Regents of the University of California.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS "AS IS" AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 /* Inetd - Internet super-server
41 * This program invokes all internet services as needed.
42 * connection-oriented services are invoked each time a
43 * connection is made, by creating a process. This process
44 * is passed the connection as file descriptor 0 and is
45 * expected to do a getpeername to find out the source host
48 * Datagram oriented services are invoked when a datagram
49 * arrives; a process is created and passed a pending message
50 * on file descriptor 0. Datagram servers may either connect
51 * to their peer, freeing up the original socket for inetd
52 * to receive further messages on, or "take over the socket",
53 * processing all arriving datagrams and, eventually, timing
54 * out. The first type of server is said to be "multi-threaded";
55 * the second type of server "single-threaded".
57 * Inetd uses a configuration file which is read at startup
58 * and, possibly, at some later time in response to a hangup signal.
59 * The configuration file is "free format" with fields given in the
60 * order shown below. Continuation lines for an entry must begin with
61 * a space or tab. All fields must be present in each entry.
63 * service name must be in /etc/services
64 * socket type stream/dgram/raw/rdm/seqpacket
65 * protocol must be in /etc/protocols
66 * wait/nowait[.max] single-threaded/multi-threaded, max #
67 * user[.group] or user[:group] user/group to run daemon as
68 * server program full path name
69 * server program arguments maximum of MAXARGS (20)
72 * service name/version must be in /etc/rpc
73 * socket type stream/dgram/raw/rdm/seqpacket
74 * protocol must be in /etc/protocols
75 * wait/nowait[.max] single-threaded/multi-threaded
76 * user[.group] or user[:group] user to run daemon as
77 * server program full path name
78 * server program arguments maximum of MAXARGS (20)
80 * For non-RPC services, the "service name" can be of the form
81 * hostaddress:servicename, in which case the hostaddress is used
82 * as the host portion of the address to listen on. If hostaddress
83 * consists of a single `*' character, INADDR_ANY is used.
85 * A line can also consist of just
87 * where hostaddress is as in the preceding paragraph. Such a line must
88 * have no further fields; the specified hostaddress is remembered and
89 * used for all further lines that have no hostaddress specified,
90 * until the next such line (or EOF). (This is why * is provided to
91 * allow explicit specification of INADDR_ANY.) A line
93 * is implicitly in effect at the beginning of the file.
95 * The hostaddress specifier may (and often will) contain dots;
96 * the service name must not.
98 * For RPC services, host-address specifiers are accepted and will
99 * work to some extent; however, because of limitations in the
100 * portmapper interface, it will not work to try to give more than
101 * one line for any given RPC service, even if the host-address
102 * specifiers are different.
104 * Comment lines are indicated by a `#' in column 1.
107 /* inetd rules for passing file descriptors to children
108 * (http://www.freebsd.org/cgi/man.cgi?query=inetd):
110 * The wait/nowait entry specifies whether the server that is invoked by
111 * inetd will take over the socket associated with the service access point,
112 * and thus whether inetd should wait for the server to exit before listen-
113 * ing for new service requests. Datagram servers must use "wait", as
114 * they are always invoked with the original datagram socket bound to the
115 * specified service address. These servers must read at least one datagram
116 * from the socket before exiting. If a datagram server connects to its
117 * peer, freeing the socket so inetd can receive further messages on the
118 * socket, it is said to be a "multi-threaded" server; it should read one
119 * datagram from the socket and create a new socket connected to the peer.
120 * It should fork, and the parent should then exit to allow inetd to check
121 * for new service requests to spawn new servers. Datagram servers which
122 * process all incoming datagrams on a socket and eventually time out are
123 * said to be "single-threaded". The comsat(8), (biff(1)) and talkd(8)
124 * utilities are both examples of the latter type of datagram server. The
125 * tftpd(8) utility is an example of a multi-threaded datagram server.
127 * Servers using stream sockets generally are multi-threaded and use the
128 * "nowait" entry. Connection requests for these services are accepted by
129 * inetd, and the server is given only the newly-accepted socket connected
130 * to a client of the service. Most stream-based services operate in this
131 * manner. Stream-based servers that use "wait" are started with the lis-
132 * tening service socket, and must accept at least one connection request
133 * before exiting. Such a server would normally accept and process incoming
134 * connection requests until a timeout.
137 /* Here's the scoop concerning the user[.:]group feature:
139 * 1) set-group-option off.
141 * a) user = root: NO setuid() or setgid() is done
143 * b) other: setgid(primary group as found in passwd)
144 * initgroups(name, primary group)
147 * 2) set-group-option on.
149 * a) user = root: setgid(specified group)
153 * b) other: setgid(specified group)
154 * initgroups(name, specified group)
162 //#define ENABLE_FEATURE_INETD_RPC 1
163 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO 1
164 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD 1
165 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME 1
166 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME 1
167 //#define ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN 1
168 //#define ENABLE_FEATURE_IPV6 1
170 #if ENABLE_FEATURE_INETD_RPC
172 #include <rpc/pmap_clnt.h>
175 #define _PATH_INETDPID "/var/run/inetd.pid"
178 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
179 #define RETRYTIME (60*10) /* retry after bind or server fail */
181 #ifndef RLIMIT_NOFILE
182 #define RLIMIT_NOFILE RLIMIT_OFILE
189 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
191 static rlim_t rlim_ofile_cur = OPEN_MAX;
192 static struct rlimit rlim_ofile;
195 /* Check unsupporting builtin */
196 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
197 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
198 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
199 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
200 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
201 # define INETD_FEATURE_ENABLED
204 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
205 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
206 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
207 # define INETD_SETPROCTITLE
210 typedef struct servtab {
211 char *se_hostaddr; /* host address to listen on */
212 char *se_service; /* name of service */
213 int se_socktype; /* type of socket to use */
214 int se_family; /* address family */
215 char *se_proto; /* protocol used */
216 #if ENABLE_FEATURE_INETD_RPC
217 int se_rpcprog; /* rpc program number */
218 int se_rpcversl; /* rpc program lowest version */
219 int se_rpcversh; /* rpc program highest version */
220 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
222 #define isrpcservice(sep) 0
224 pid_t se_wait; /* single threaded server */
225 short se_checked; /* looked at during merge */
226 char *se_user; /* user name to run as */
227 char *se_group; /* group name to run as */
228 #ifdef INETD_FEATURE_ENABLED
229 const struct builtin *se_bi; /* if built-in, description */
231 char *se_server; /* server program */
233 char *se_argv[MAXARGV + 1]; /* program arguments */
234 int se_fd; /* open descriptor */
236 struct sockaddr se_un_ctrladdr;
237 struct sockaddr_in se_un_ctrladdr_in;
238 #if ENABLE_FEATURE_IPV6
239 struct sockaddr_in6 se_un_ctrladdr_in6;
241 struct sockaddr_un se_un_ctrladdr_un;
242 } se_un; /* bound address */
243 #define se_ctrladdr se_un.se_un_ctrladdr
244 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
245 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
246 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
247 int se_ctrladdr_size;
248 int se_max; /* max # of instances of this service */
249 int se_count; /* number started since se_time */
250 struct timeval se_time; /* start of se_count */
251 struct servtab *se_next;
254 static servtab_t *servtab;
256 #ifdef INETD_FEATURE_ENABLED
258 const char *bi_service; /* internally provided service name */
259 int bi_socktype; /* type of socket supported */
260 short bi_fork; /* 1 if should fork before call */
261 short bi_wait; /* 1 if should wait for child */
262 void (*bi_fn) (int, servtab_t *);
265 /* Echo received data */
266 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
267 static void echo_stream(int, servtab_t *);
268 static void echo_dg(int, servtab_t *);
270 /* Internet /dev/null */
271 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
272 static void discard_stream(int, servtab_t *);
273 static void discard_dg(int, servtab_t *);
275 /* Return 32 bit time since 1900 */
276 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
277 static void machtime_stream(int, servtab_t *);
278 static void machtime_dg(int, servtab_t *);
280 /* Return human-readable time */
281 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
282 static void daytime_stream(int, servtab_t *);
283 static void daytime_dg(int, servtab_t *);
285 /* Familiar character generator */
286 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
287 static void chargen_stream(int, servtab_t *);
288 static void chargen_dg(int, servtab_t *);
291 static const struct builtin builtins[] = {
292 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
293 /* Echo received data */
294 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
295 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
297 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
298 /* Internet /dev/null */
299 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
300 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
302 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
303 /* Return 32 bit time since 1900 */
304 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
305 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
307 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
308 /* Return human-readable time */
309 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
310 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
312 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
313 /* Familiar character generator */
314 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
315 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
317 {NULL, 0, 0, 0, NULL}
319 #endif /* INETD_FEATURE_ENABLED */
321 static int global_queuelen = 128;
322 static int nsock, maxsock;
323 static fd_set allsock;
325 static int timingout;
326 static struct servent *sp;
329 static const char *config_filename = "/etc/inetd.conf";
331 static FILE *fconfig;
332 static char *defhost;
334 /* xstrdup(NULL) returns NULL, but this one
335 * will return newly-allocated "" if called with NULL arg
336 * TODO: audit whether this makes any real difference
338 static char *xxstrdup(char *cp)
340 return xstrdup(cp ? cp : "");
343 static int setconfig(void)
346 defhost = xstrdup("*");
347 if (fconfig != NULL) {
348 fseek(fconfig, 0L, SEEK_SET);
351 fconfig = fopen(config_filename, "r");
352 return (fconfig != NULL);
355 static void endconfig(void)
358 (void) fclose(fconfig);
365 #if ENABLE_FEATURE_INETD_RPC
366 static void register_rpc(servtab_t *sep)
369 struct sockaddr_in ir_sin;
373 if ((pp = getprotobyname(sep->se_proto + 4)) == NULL) {
374 bb_perror_msg("%s: getproto", sep->se_proto);
377 size = sizeof ir_sin;
378 if (getsockname(sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
379 bb_perror_msg("%s/%s: getsockname",
380 sep->se_service, sep->se_proto);
384 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
385 (void) pmap_unset(sep->se_rpcprog, n);
386 if (!pmap_set(sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port)))
387 bb_perror_msg("%s %s: pmap_set: %u %u %u %u",
388 sep->se_service, sep->se_proto,
389 sep->se_rpcprog, n, pp->p_proto, ntohs(ir_sin.sin_port));
393 static void unregister_rpc(servtab_t *sep)
397 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
398 if (!pmap_unset(sep->se_rpcprog, n))
399 bb_error_msg("pmap_unset(%u, %u)", sep->se_rpcprog, n);
402 #endif /* FEATURE_INETD_RPC */
404 static void freeconfig(servtab_t *cp)
408 free(cp->se_hostaddr);
409 free(cp->se_service);
414 for (i = 0; i < MAXARGV; i++)
415 free(cp->se_argv[i]);
418 static int bump_nofile(void)
424 if (getrlimit(RLIMIT_NOFILE, &rl) < 0) {
425 bb_perror_msg("getrlimit");
428 rl.rlim_cur = MIN(rl.rlim_max, rl.rlim_cur + FD_CHUNK);
429 rl.rlim_cur = MIN(FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
430 if (rl.rlim_cur <= rlim_ofile_cur) {
431 bb_error_msg("bump_nofile: cannot extend file limit, max = %d",
436 if (setrlimit(RLIMIT_NOFILE, &rl) < 0) {
437 bb_perror_msg("setrlimit");
441 rlim_ofile_cur = rl.rlim_cur;
445 static void setup(servtab_t *sep)
449 sep->se_fd = socket(sep->se_family, sep->se_socktype, 0);
450 if (sep->se_fd < 0) {
451 bb_perror_msg("%s/%s: socket", sep->se_service, sep->se_proto);
454 if (setsockopt_reuseaddr(sep->se_fd) < 0)
455 bb_perror_msg("setsockopt(SO_REUSEADDR)");
457 #if ENABLE_FEATURE_INETD_RPC
458 if (isrpcservice(sep)) {
462 * for RPC services, attempt to use a reserved port
463 * if they are going to be running as root.
465 * Also, zero out the port for all RPC services; let bind()
468 sep->se_ctrladdr_in.sin_port = 0;
469 if (sep->se_user && (pwd = getpwnam(sep->se_user)) &&
470 pwd->pw_uid == 0 && uid == 0)
471 r = bindresvport(sep->se_fd, &sep->se_ctrladdr_in);
473 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
475 socklen_t len = sep->se_ctrladdr_size;
476 int saveerrno = errno;
478 /* update se_ctrladdr_in.sin_port */
479 r = getsockname(sep->se_fd, &sep->se_ctrladdr, &len);
486 r = bind(sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
488 bb_perror_msg("%s/%s (%d): bind",
489 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
498 if (sep->se_socktype == SOCK_STREAM)
499 listen(sep->se_fd, global_queuelen);
501 FD_SET(sep->se_fd, &allsock);
503 if (sep->se_fd > maxsock) {
504 maxsock = sep->se_fd;
505 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
510 static char *nextline(void)
512 #define line bb_common_bufsiz1
517 if (fgets(line, sizeof(line), fd) == NULL)
519 cp = strchr(line, '\n');
525 static char *skip(char **cpp) /* int report; */
533 /* bb_error_msg("syntax error in inetd config file"); */
538 while (*cp == ' ' || *cp == '\t')
545 if (c == ' ' || c == '\t') {
555 while (*cp && *cp != ' ' && *cp != '\t')
559 /* if ((*cpp = cp) == NULL) */
566 static servtab_t *new_servtab(void)
568 return xmalloc(sizeof(servtab_t));
571 static servtab_t *dupconfig(servtab_t *sep)
576 newtab = new_servtab();
577 memset(newtab, 0, sizeof(servtab_t));
578 newtab->se_service = xstrdup(sep->se_service);
579 newtab->se_socktype = sep->se_socktype;
580 newtab->se_family = sep->se_family;
581 newtab->se_proto = xstrdup(sep->se_proto);
582 #if ENABLE_FEATURE_INETD_RPC
583 newtab->se_rpcprog = sep->se_rpcprog;
584 newtab->se_rpcversl = sep->se_rpcversl;
585 newtab->se_rpcversh = sep->se_rpcversh;
587 newtab->se_wait = sep->se_wait;
588 newtab->se_user = xstrdup(sep->se_user);
589 newtab->se_group = xstrdup(sep->se_group);
590 #ifdef INETD_FEATURE_ENABLED
591 newtab->se_bi = sep->se_bi;
593 newtab->se_server = xstrdup(sep->se_server);
595 for (argc = 0; argc <= MAXARGV; argc++)
596 newtab->se_argv[argc] = xstrdup(sep->se_argv[argc]);
597 newtab->se_max = sep->se_max;
602 static servtab_t *getconfigent(void)
613 /* memset(sep, 0, sizeof *sep); */
615 /* freeconfig(sep); */
617 while ((cp = nextline()) && *cp == '#') /* skip comment line */;
623 memset((char *) sep, 0, sizeof *sep);
630 /* Check for a host name. */
631 hostdelim = strrchr(arg, ':');
634 sep->se_hostaddr = xstrdup(arg);
637 * If the line is of the form `host:', then just change the
638 * default host for the following lines.
644 defhost = sep->se_hostaddr;
649 sep->se_hostaddr = xxstrdup(defhost);
651 sep->se_service = xxstrdup(arg);
654 if (strcmp(arg, "stream") == 0)
655 sep->se_socktype = SOCK_STREAM;
656 else if (strcmp(arg, "dgram") == 0)
657 sep->se_socktype = SOCK_DGRAM;
658 else if (strcmp(arg, "rdm") == 0)
659 sep->se_socktype = SOCK_RDM;
660 else if (strcmp(arg, "seqpacket") == 0)
661 sep->se_socktype = SOCK_SEQPACKET;
662 else if (strcmp(arg, "raw") == 0)
663 sep->se_socktype = SOCK_RAW;
665 sep->se_socktype = -1;
667 sep->se_proto = xxstrdup(skip(&cp));
669 if (strcmp(sep->se_proto, "unix") == 0) {
670 sep->se_family = AF_UNIX;
672 sep->se_family = AF_INET;
673 if (sep->se_proto[strlen(sep->se_proto) - 1] == '6')
674 #if ENABLE_FEATURE_IPV6
675 sep->se_family = AF_INET6;
677 bb_error_msg("%s: IPV6 not supported", sep->se_proto);
679 if (strncmp(sep->se_proto, "rpc/", 4) == 0) {
680 #if ENABLE_FEATURE_INETD_RPC
684 p = strchr(sep->se_service, '/');
686 bb_error_msg("%s: no rpc version", sep->se_service);
690 l = strtol(p, &ccp, 0);
691 if (ccp == p || l < 0 || l > INT_MAX) {
693 bb_error_msg("%s/%s: bad rpc version", sep->se_service, p);
696 sep->se_rpcversl = sep->se_rpcversh = l;
699 l = strtol(p, &ccp, 0);
700 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
702 sep->se_rpcversh = l;
703 } else if (*ccp != '\0')
706 bb_error_msg("%s: rpc services not supported", sep->se_service);
715 char *s = strchr(arg, '.');
718 sep->se_max = xatoi(s);
720 sep->se_max = toomany;
722 sep->se_wait = strcmp(arg, "wait") == 0;
723 /* if ((arg = skip(&cp, 1)) == NULL) */
725 sep->se_user = xxstrdup(skip(&cp));
726 arg = strchr(sep->se_user, '.');
728 arg = strchr(sep->se_user, ':');
731 sep->se_group = xstrdup(arg);
733 /* if ((arg = skip(&cp, 1)) == NULL) */
736 sep->se_server = xxstrdup(skip(&cp));
737 if (strcmp(sep->se_server, "internal") == 0) {
738 #ifdef INETD_FEATURE_ENABLED
739 const struct builtin *bi;
741 for (bi = builtins; bi->bi_service; bi++)
742 if (bi->bi_socktype == sep->se_socktype &&
743 strcmp(bi->bi_service, sep->se_service) == 0)
745 if (bi->bi_service == 0) {
746 bb_error_msg("internal service %s unknown", sep->se_service);
750 sep->se_wait = bi->bi_wait;
752 bb_perror_msg("internal service %s unknown", sep->se_service);
756 #ifdef INETD_FEATURE_ENABLED
761 for (arg = skip(&cp); cp; arg = skip(&cp)) {
763 sep->se_argv[argc++] = xxstrdup(arg);
765 while (argc <= MAXARGV)
766 sep->se_argv[argc++] = NULL;
769 * Now that we've processed the entire line, check if the hostname
770 * specifier was a comma separated list of hostnames. If so
771 * we'll make new entries for each address.
773 while ((hostdelim = strrchr(sep->se_hostaddr, ',')) != NULL) {
774 nsep = dupconfig(sep);
777 * NULL terminate the hostname field of the existing entry,
778 * and make a dup for the new entry.
781 nsep->se_hostaddr = xstrdup(hostdelim);
783 nsep->se_next = sep->se_next;
788 while (nsep != NULL) {
789 nsep->se_checked = 1;
790 if (nsep->se_family == AF_INET) {
791 if (LONE_CHAR(nsep->se_hostaddr, '*'))
792 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
793 else if (!inet_aton(nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
796 hp = gethostbyname(nsep->se_hostaddr);
798 bb_error_msg("%s: unknown host", nsep->se_hostaddr);
799 nsep->se_checked = 0;
801 } else if (hp->h_addrtype != AF_INET) {
802 bb_error_msg("%s: address isn't an Internet "
803 "address", nsep->se_hostaddr);
804 nsep->se_checked = 0;
809 memmove(&nsep->se_ctrladdr_in.sin_addr,
810 hp->h_addr_list[0], sizeof(struct in_addr));
811 while (hp->h_addr_list[i] != NULL) {
812 psep = dupconfig(nsep);
813 psep->se_hostaddr = xxstrdup(nsep->se_hostaddr);
814 psep->se_checked = 1;
815 memmove(&psep->se_ctrladdr_in.sin_addr,
816 hp->h_addr_list[i], sizeof(struct in_addr));
817 psep->se_ctrladdr_size = sizeof(psep->se_ctrladdr_in);
819 /* Prepend to list, don't want to look up */
820 /* its hostname again. */
827 /* XXX BUG?: is this skip: label supposed to remain? */
829 nsep = nsep->se_next;
833 * Finally, free any entries which failed the gethostbyname
838 while (nsep != NULL) {
841 if (nsep->se_checked == 0) {
847 nsep = nsep->se_next;
848 psep->se_next = nsep;
852 nsep->se_checked = 0;
854 nsep = nsep->se_next;
861 #define Block_Using_Signals(m) do { \
863 sigaddset(&m, SIGCHLD); \
864 sigaddset(&m, SIGHUP); \
865 sigaddset(&m, SIGALRM); \
866 sigprocmask(SIG_BLOCK, &m, NULL); \
869 static servtab_t *enter(servtab_t *cp)
877 #if ENABLE_FEATURE_INETD_RPC
878 sep->se_rpcprog = -1;
880 Block_Using_Signals(omask);
881 sep->se_next = servtab;
883 sigprocmask(SIG_UNBLOCK, &omask, NULL);
887 static int matchconf(servtab_t *old, servtab_t *new)
889 if (strcmp(old->se_service, new->se_service) != 0)
892 if (strcmp(old->se_hostaddr, new->se_hostaddr) != 0)
895 if (strcmp(old->se_proto, new->se_proto) != 0)
899 * If the new servtab is bound to a specific address, check that the
900 * old servtab is bound to the same entry. If the new service is not
901 * bound to a specific address then the check of se_hostaddr above
905 if (old->se_family == AF_INET && new->se_family == AF_INET &&
906 memcmp(&old->se_ctrladdr_in.sin_addr,
907 &new->se_ctrladdr_in.sin_addr,
908 sizeof(new->se_ctrladdr_in.sin_addr)) != 0)
911 #if ENABLE_FEATURE_IPV6
912 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
913 memcmp(&old->se_ctrladdr_in6.sin6_addr,
914 &new->se_ctrladdr_in6.sin6_addr,
915 sizeof(new->se_ctrladdr_in6.sin6_addr)) != 0)
921 static void config(int sig ATTRIBUTE_UNUSED)
923 servtab_t *sep, *cp, **sepp;
929 bb_perror_msg("%s", config_filename);
932 for (sep = servtab; sep; sep = sep->se_next)
936 for (sep = servtab; sep; sep = sep->se_next)
937 if (matchconf(sep, cp))
943 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
945 Block_Using_Signals(omask);
947 * sep->se_wait may be holding the pid of a daemon
948 * that we're waiting for. If so, don't overwrite
949 * it unless the config file explicitly says don't
953 #ifdef INETD_FEATURE_ENABLED
956 (sep->se_wait == 1 || cp->se_wait == 0))
957 sep->se_wait = cp->se_wait;
958 SWAP(int, cp->se_max, sep->se_max);
959 SWAP(char *, sep->se_user, cp->se_user);
960 SWAP(char *, sep->se_group, cp->se_group);
961 SWAP(char *, sep->se_server, cp->se_server);
962 for (i = 0; i < MAXARGV; i++)
963 SWAP(char *, sep->se_argv[i], cp->se_argv[i]);
966 #if ENABLE_FEATURE_INETD_RPC
967 if (isrpcservice(sep))
969 sep->se_rpcversl = cp->se_rpcversl;
970 sep->se_rpcversh = cp->se_rpcversh;
972 sigprocmask(SIG_UNBLOCK, &omask, NULL);
979 switch (sep->se_family) {
981 if (sep->se_fd != -1)
983 (void) unlink(sep->se_service);
984 n = strlen(sep->se_service);
985 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
986 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
987 safe_strncpy(sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
988 sep->se_ctrladdr_un.sun_family = AF_UNIX;
989 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
993 sep->se_ctrladdr_in.sin_family = AF_INET;
994 /* se_ctrladdr_in was set in getconfigent */
995 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
997 #if ENABLE_FEATURE_INETD_RPC
998 if (isrpcservice(sep)) {
1000 // FIXME: atoi_or_else(str, 0) would be handy here
1001 sep->se_rpcprog = atoi(sep->se_service);
1002 if (sep->se_rpcprog == 0) {
1003 rp = getrpcbyname(sep->se_service);
1005 bb_error_msg("%s: unknown rpc service", sep->se_service);
1008 sep->se_rpcprog = rp->r_number;
1010 if (sep->se_fd == -1)
1012 if (sep->se_fd != -1)
1017 uint16_t port = htons(atoi(sep->se_service));
1018 // FIXME: atoi_or_else(str, 0) would be handy here
1020 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1021 if (isdigit(protoname[strlen(protoname) - 1]))
1022 protoname[strlen(protoname) - 1] = '\0';
1023 sp = getservbyname(sep->se_service, protoname);
1025 bb_error_msg("%s/%s: unknown service",
1026 sep->se_service, sep->se_proto);
1031 if (port != sep->se_ctrladdr_in.sin_port) {
1032 sep->se_ctrladdr_in.sin_port = port;
1033 if (sep->se_fd != -1) {
1034 FD_CLR(sep->se_fd, &allsock);
1036 (void) close(sep->se_fd);
1040 if (sep->se_fd == -1)
1044 #if ENABLE_FEATURE_IPV6
1046 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1047 /* se_ctrladdr_in was set in getconfigent */
1048 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1050 #if ENABLE_FEATURE_INETD_RPC
1051 if (isrpcservice(sep)) {
1054 sep->se_rpcprog = atoi(sep->se_service);
1055 if (sep->se_rpcprog == 0) {
1056 rp = getrpcbyname(sep->se_service);
1058 bb_error_msg("%s: unknown rpc service", sep->se_service);
1061 sep->se_rpcprog = rp->r_number;
1063 if (sep->se_fd == -1)
1065 if (sep->se_fd != -1)
1070 uint16_t port = htons(atoi(sep->se_service));
1073 /*XXX*/ strncpy(protoname, sep->se_proto, sizeof(protoname));
1074 if (isdigit(protoname[strlen(protoname) - 1]))
1075 protoname[strlen(protoname) - 1] = '\0';
1076 sp = getservbyname(sep->se_service, protoname);
1078 bb_error_msg("%s/%s: unknown service",
1079 sep->se_service, sep->se_proto);
1084 if (port != sep->se_ctrladdr_in6.sin6_port) {
1085 sep->se_ctrladdr_in6.sin6_port = port;
1086 if (sep->se_fd != -1) {
1087 FD_CLR(sep->se_fd, &allsock);
1089 (void) close(sep->se_fd);
1093 if (sep->se_fd == -1)
1097 #endif /* FEATURE_IPV6 */
1100 if (cp->se_next != NULL) {
1101 servtab_t *tmp = cp;
1107 cp = getconfigent();
1112 * Purge anything not looked at above.
1114 Block_Using_Signals(omask);
1116 while ((sep = *sepp)) {
1117 if (sep->se_checked) {
1118 sepp = &sep->se_next;
1121 *sepp = sep->se_next;
1122 if (sep->se_fd != -1) {
1123 FD_CLR(sep->se_fd, &allsock);
1125 (void) close(sep->se_fd);
1127 #if ENABLE_FEATURE_INETD_RPC
1128 if (isrpcservice(sep))
1129 unregister_rpc(sep);
1131 if (sep->se_family == AF_UNIX)
1132 (void) unlink(sep->se_service);
1136 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1140 static void reapchild(int sig ATTRIBUTE_UNUSED)
1143 int save_errno = errno, status;
1147 pid = wait3(&status, WNOHANG, NULL);
1150 for (sep = servtab; sep; sep = sep->se_next)
1151 if (sep->se_wait == pid) {
1152 if (WIFEXITED(status) && WEXITSTATUS(status))
1153 bb_error_msg("%s: exit status 0x%x",
1154 sep->se_server, WEXITSTATUS(status));
1155 else if (WIFSIGNALED(status))
1156 bb_error_msg("%s: exit signal 0x%x",
1157 sep->se_server, WTERMSIG(status));
1159 FD_SET(sep->se_fd, &allsock);
1166 static void retry(int sig ATTRIBUTE_UNUSED)
1171 for (sep = servtab; sep; sep = sep->se_next) {
1172 if (sep->se_fd == -1) {
1173 switch (sep->se_family) {
1176 #if ENABLE_FEATURE_IPV6
1180 #if ENABLE_FEATURE_INETD_RPC
1181 if (sep->se_fd != -1 && isrpcservice(sep))
1190 static void goaway(int sig ATTRIBUTE_UNUSED)
1194 /* XXX signal race walking sep list */
1195 for (sep = servtab; sep; sep = sep->se_next) {
1196 if (sep->se_fd == -1)
1199 switch (sep->se_family) {
1201 (void) unlink(sep->se_service);
1204 #if ENABLE_FEATURE_IPV6
1207 #if ENABLE_FEATURE_INETD_RPC
1208 if (sep->se_wait == 1 && isrpcservice(sep))
1209 unregister_rpc(sep); /* XXX signal race */
1213 (void) close(sep->se_fd);
1215 remove_pidfile(_PATH_INETDPID);
1220 #ifdef INETD_SETPROCTITLE
1222 static char *LastArg;
1225 inetd_setproctitle(char *a, int s)
1229 struct sockaddr_in prt_sin;
1233 size = sizeof(prt_sin);
1234 (void) snprintf(buf, sizeof buf, "-%s", a);
1235 if (getpeername(s, (struct sockaddr *) &prt_sin, &size) == 0) {
1236 char *sa = inet_ntoa(prt_sin.sin_addr);
1238 buf[sizeof(buf) - 1 - strlen(sa) - 3] = '\0';
1243 strncpy(cp, buf, LastArg - cp);
1245 while (cp < LastArg)
1251 int inetd_main(int argc, char **argv);
1252 int inetd_main(int argc, char **argv)
1256 struct group *grp = NULL;
1258 struct sigaction sa, sapipe;
1263 sigset_t omask, wait_mask;
1265 #ifdef INETD_SETPROCTITLE
1266 extern char **environ;
1267 char **envp = environ;
1270 if (envp == 0 || *envp == 0)
1274 LastArg = envp[-1] + strlen(envp[-1]);
1279 config_filename = NULL;
1281 opt = getopt32(argc, argv, "R:f", &stoomany);
1283 toomany = xatoi_u(stoomany);
1287 config_filename = argv[0];
1288 if (config_filename == NULL)
1289 bb_error_msg_and_die("non-root must specify a config file");
1292 bb_daemonize_or_rexec(0, argv - optind);
1294 bb_sanitize_stdio();
1295 openlog(applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1296 logmode = LOGMODE_SYSLOG;
1299 /* If run by hand, ensure groups vector gets trashed */
1300 gid_t gid = getgid();
1304 write_pidfile(_PATH_INETDPID);
1306 if (getrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0) {
1307 bb_perror_msg("getrlimit");
1309 rlim_ofile_cur = rlim_ofile.rlim_cur;
1310 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1311 rlim_ofile_cur = OPEN_MAX;
1314 memset((char *) &sa, 0, sizeof(sa));
1315 sigemptyset(&sa.sa_mask);
1316 sigaddset(&sa.sa_mask, SIGALRM);
1317 sigaddset(&sa.sa_mask, SIGCHLD);
1318 sigaddset(&sa.sa_mask, SIGHUP);
1319 sa.sa_handler = retry;
1320 sigaction(SIGALRM, &sa, NULL);
1322 sa.sa_handler = config;
1323 sigaction(SIGHUP, &sa, NULL);
1324 sa.sa_handler = reapchild;
1325 sigaction(SIGCHLD, &sa, NULL);
1326 sa.sa_handler = goaway;
1327 sigaction(SIGTERM, &sa, NULL);
1328 sa.sa_handler = goaway;
1329 sigaction(SIGINT, &sa, NULL);
1330 sa.sa_handler = SIG_IGN;
1331 sigaction(SIGPIPE, &sa, &sapipe);
1332 memset(&wait_mask, 0, sizeof(wait_mask));
1334 /* space for daemons to overwrite environment for ps */
1335 #define DUMMYSIZE 100
1336 char dummy[DUMMYSIZE];
1338 (void) memset(dummy, 'x', DUMMYSIZE - 1);
1339 dummy[DUMMYSIZE - 1] = '\0';
1341 (void) setenv("inetd_dummy", dummy, 1);
1349 Block_Using_Signals(omask);
1351 sigsuspend(&wait_mask);
1352 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1356 n = select(maxsock + 1, &readable, NULL, NULL, NULL);
1358 if (n < 0 && errno != EINTR) {
1359 bb_perror_msg("select");
1365 for (sep = servtab; n && sep; sep = sep->se_next) {
1366 if (sep->se_fd == -1 || !FD_ISSET(sep->se_fd, &readable))
1370 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1371 ctrl = accept(sep->se_fd, NULL, NULL);
1375 bb_perror_msg("accept (for %s)", sep->se_service);
1378 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1379 struct sockaddr_in peer;
1380 socklen_t plen = sizeof(peer);
1382 if (getpeername(ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1383 bb_error_msg("cannot getpeername");
1387 if (ntohs(peer.sin_port) == 20) {
1388 /* XXX ftp bounce */
1396 Block_Using_Signals(omask);
1398 #ifdef INETD_FEATURE_ENABLED
1399 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1402 if (sep->se_count++ == 0)
1403 (void) gettimeofday(&sep->se_time, NULL);
1404 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1407 (void) gettimeofday(&now, NULL);
1408 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1412 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1414 if (sep->se_family == AF_INET &&
1415 ntohs(sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1417 * Cannot close it -- there are
1418 * thieves on the system.
1419 * Simply ignore the connection.
1424 bb_error_msg("%s/%s server failing (looping), service terminated",
1425 sep->se_service, sep->se_proto);
1426 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1428 FD_CLR(sep->se_fd, &allsock);
1429 (void) close(sep->se_fd);
1433 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1444 bb_perror_msg("fork");
1445 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1447 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1451 if (pid && sep->se_wait) {
1453 FD_CLR(sep->se_fd, &allsock);
1456 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1458 #ifdef INETD_FEATURE_ENABLED
1460 (*sep->se_bi->bi_fn)(ctrl, sep);
1464 pwd = getpwnam(sep->se_user);
1466 bb_error_msg("getpwnam: %s: no such user", sep->se_user);
1470 bb_perror_msg("%s: setsid", sep->se_service);
1471 if (sep->se_group && (grp = getgrnam(sep->se_group)) == NULL) {
1472 bb_error_msg("getgrnam: %s: no such group", sep->se_group);
1476 /* a user running private inetd */
1477 if (uid != pwd->pw_uid)
1479 } else if (pwd->pw_uid) {
1481 pwd->pw_gid = grp->gr_gid;
1482 xsetgid((gid_t) pwd->pw_gid);
1483 initgroups(pwd->pw_name, pwd->pw_gid);
1484 xsetuid((uid_t) pwd->pw_uid);
1485 } else if (sep->se_group) {
1486 xsetgid(grp->gr_gid);
1487 setgroups(1, &grp->gr_gid);
1490 if (ctrl) close(ctrl);
1493 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1494 if (setrlimit(RLIMIT_NOFILE, &rlim_ofile) < 0)
1495 bb_perror_msg("setrlimit");
1497 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1498 (void) close(tmpint);
1499 sigaction(SIGPIPE, &sapipe, NULL);
1500 execv(sep->se_server, sep->se_argv);
1501 bb_perror_msg("execv %s", sep->se_server);
1503 if (sep->se_socktype != SOCK_STREAM)
1504 recv(0, buf, sizeof(buf), 0);
1508 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1510 } /* for (sep = servtab...) */
1515 * Internet services provided internally by inetd:
1517 #define BUFSIZE 4096
1519 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
1520 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN || \
1521 ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1522 static int dg_badinput(struct sockaddr_in *dg_sin)
1524 if (ntohs(dg_sin->sin_port) < IPPORT_RESERVED)
1526 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST))
1528 /* XXX compare against broadcast addresses in SIOCGIFCONF list? */
1533 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
1534 /* Echo service -- echo data back */
1537 echo_stream(int s, servtab_t *sep)
1539 char buffer[BUFSIZE];
1542 inetd_setproctitle(sep->se_service, s);
1544 i = read(s, buffer, sizeof(buffer));
1546 /* FIXME: this isnt correct - safe_write()? */
1547 if (write(s, buffer, i) <= 0) break;
1552 /* Echo service -- echo data back */
1555 echo_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1557 char buffer[BUFSIZE];
1560 /* struct sockaddr_storage ss; */
1564 i = recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size);
1567 if (dg_badinput((struct sockaddr_in *) &sa))
1569 (void) sendto(s, buffer, i, 0, &sa, sizeof(sa));
1571 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1573 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1574 /* Discard service -- ignore data */
1577 discard_stream(int s, servtab_t *sep)
1579 char buffer[BUFSIZE];
1581 inetd_setproctitle(sep->se_service, s);
1584 if (read(s, buffer, sizeof(buffer)) <= 0 && errno != EINTR)
1589 /* Discard service -- ignore data */
1592 discard_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1594 char buffer[BUFSIZE];
1596 (void) read(s, buffer, sizeof(buffer));
1598 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1601 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1603 static char ring[128];
1604 static char *endring;
1613 for (i = 0; i <= 128; ++i)
1618 /* Character generator */
1621 chargen_stream(int s, servtab_t *sep)
1625 char text[LINESIZ + 2];
1627 inetd_setproctitle(sep->se_service, s);
1634 text[LINESIZ] = '\r';
1635 text[LINESIZ + 1] = '\n';
1640 memmove(text, rs, LINESIZ);
1642 memmove(text, rs, len);
1643 memmove(text + len, ring, LINESIZ - len);
1645 if (++rs == endring)
1647 if (write(s, text, sizeof(text)) != sizeof(text))
1653 /* Character generator */
1656 chargen_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1658 /* struct sockaddr_storage ss; */
1662 char text[LINESIZ + 2];
1671 if (recvfrom(s, text, sizeof(text), 0, &sa, &size) < 0)
1673 if (dg_badinput((struct sockaddr_in *) &sa))
1676 if ((len = endring - rs) >= LINESIZ)
1677 memmove(text, rs, LINESIZ);
1679 memmove(text, rs, len);
1680 memmove(text + len, ring, LINESIZ - len);
1682 if (++rs == endring)
1684 text[LINESIZ] = '\r';
1685 text[LINESIZ + 1] = '\n';
1686 (void) sendto(s, text, sizeof(text), 0, &sa, sizeof(sa));
1688 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1691 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1693 * Return a machine readable date and time, in the form of the
1694 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1695 * returns the number of seconds since midnight, Jan 1, 1970,
1696 * we must add 2208988800 seconds to this figure to make up for
1697 * some seventy years Bell Labs was asleep.
1700 static unsigned machtime(void)
1704 if (gettimeofday(&tv, NULL) < 0) {
1705 fprintf(stderr, "Unable to get time of day\n");
1708 return htonl((unsigned) tv.tv_sec + 2208988800UL);
1713 machtime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1717 result = machtime();
1718 (void) write(s, (char *) &result, sizeof(result));
1723 machtime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1726 /* struct sockaddr_storage ss; */
1728 struct sockaddr_in *dg_sin;
1732 if (recvfrom(s, (char *) &result, sizeof(result), 0, &sa, &size) < 0)
1734 /* if (dg_badinput((struct sockaddr *)&ss)) */
1735 dg_sin = (struct sockaddr_in *) &sa;
1736 if (dg_sin->sin_addr.s_addr == htonl(INADDR_BROADCAST) ||
1737 ntohs(dg_sin->sin_port) < IPPORT_RESERVED / 2)
1739 result = machtime();
1740 (void) sendto(s, (char *) &result, sizeof(result), 0, &sa, sizeof(sa));
1742 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1745 #if ENABLE_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1746 /* Return human-readable time of day */
1748 static void daytime_stream(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1755 // fdprintf instead?
1756 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1757 (void) write(s, buffer, strlen(buffer));
1760 /* Return human-readable time of day */
1763 daytime_dg(int s, servtab_t *sep ATTRIBUTE_UNUSED)
1767 /* struct sockaddr_storage ss; */
1774 if (recvfrom(s, buffer, sizeof(buffer), 0, &sa, &size) < 0)
1776 if (dg_badinput((struct sockaddr_in *) &sa))
1778 (void) sprintf(buffer, "%.24s\r\n", ctime(&t));
1779 (void) sendto(s, buffer, strlen(buffer), 0, &sa, sizeof(sa));
1781 #endif /* FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */