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
40 * Inetd - Internet super-server
42 * This program invokes all internet services as needed.
43 * connection-oriented services are invoked each time a
44 * connection is made, by creating a process. This process
45 * is passed the connection as file descriptor 0 and is
46 * expected to do a getpeername to find out the source host
49 * Datagram oriented services are invoked when a datagram
50 * arrives; a process is created and passed a pending message
51 * on file descriptor 0. Datagram servers may either connect
52 * to their peer, freeing up the original socket for inetd
53 * to receive further messages on, or ``take over the socket'',
54 * processing all arriving datagrams and, eventually, timing
55 * out. The first type of server is said to be ``multi-threaded'';
56 * the second type of server ``single-threaded''.
58 * Inetd uses a configuration file which is read at startup
59 * and, possibly, at some later time in response to a hangup signal.
60 * The configuration file is ``free format'' with fields given in the
61 * order shown below. Continuation lines for an entry must begin with
62 * a space or tab. All fields must be present in each entry.
64 * service name must be in /etc/services
65 * socket type stream/dgram/raw/rdm/seqpacket
66 * protocol must be in /etc/protocols
67 * wait/nowait[.max] single-threaded/multi-threaded, max #
68 * user[.group] or user[:group] user/group to run daemon as
69 * server program full path name
70 * server program arguments maximum of MAXARGS (20)
73 * service name/version must be in /etc/rpc
74 * socket type stream/dgram/raw/rdm/seqpacket
75 * protocol must be in /etc/protocols
76 * wait/nowait[.max] single-threaded/multi-threaded
77 * user[.group] or user[:group] user to run daemon as
78 * server program full path name
79 * server program arguments maximum of MAXARGS (20)
81 * For non-RPC services, the "service name" can be of the form
82 * hostaddress:servicename, in which case the hostaddress is used
83 * as the host portion of the address to listen on. If hostaddress
84 * consists of a single `*' character, INADDR_ANY is used.
86 * A line can also consist of just
88 * where hostaddress is as in the preceding paragraph. Such a line must
89 * have no further fields; the specified hostaddress is remembered and
90 * used for all further lines that have no hostaddress specified,
91 * until the next such line (or EOF). (This is why * is provided to
92 * allow explicit specification of INADDR_ANY.) A line
94 * is implicitly in effect at the beginning of the file.
96 * The hostaddress specifier may (and often will) contain dots;
97 * the service name must not.
99 * For RPC services, host-address specifiers are accepted and will
100 * work to some extent; however, because of limitations in the
101 * portmapper interface, it will not work to try to give more than
102 * one line for any given RPC service, even if the host-address
103 * specifiers are different.
105 * Comment lines are indicated by a `#' in column 1.
109 * Here's the scoop concerning the user[.:]group feature:
111 * 1) set-group-option off.
113 * a) user = root: NO setuid() or setgid() is done
115 * b) other: setgid(primary group as found in passwd)
116 * initgroups(name, primary group)
119 * 2) set-group-option on.
121 * a) user = root: setgid(specified group)
125 * b) other: setgid(specified group)
126 * initgroups(name, specified group)
135 //#define CONFIG_FEATURE_INETD_RPC
136 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
137 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
138 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
139 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
140 //#define CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
141 //#define CONFIG_FEATURE_IPV6
143 #ifdef CONFIG_FEATURE_INETD_RPC
145 #include <rpc/pmap_clnt.h>
148 #define _PATH_INETDCONF "/etc/inetd.conf"
149 #define _PATH_INETDPID "/var/run/inetd.pid"
152 #define TOOMANY 0 /* don't start more than TOOMANY */
154 #define CNT_INTVL 60 /* servers in CNT_INTVL sec. */
155 #define RETRYTIME (60*10) /* retry after bind or server fail */
157 #ifndef RLIMIT_NOFILE
158 #define RLIMIT_NOFILE RLIMIT_OFILE
165 /* Reserve some descriptors, 3 stdio + at least: 1 log, 1 conf. file */
166 #define FD_MARGIN (8)
167 static rlim_t rlim_ofile_cur = OPEN_MAX;
168 static struct rlimit rlim_ofile;
171 /* Check unsupporting builtin */
172 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
173 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
174 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME || \
175 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME || \
176 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
177 # define INETD_FEATURE_ENABLED
180 #if defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO || \
181 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD || \
182 defined CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
183 # define INETD_SETPROCTITLE
186 typedef struct servtab
188 char *se_hostaddr; /* host address to listen on */
189 char *se_service; /* name of service */
190 int se_socktype; /* type of socket to use */
191 int se_family; /* address family */
192 char *se_proto; /* protocol used */
193 #ifdef CONFIG_FEATURE_INETD_RPC
194 int se_rpcprog; /* rpc program number */
195 int se_rpcversl; /* rpc program lowest version */
196 int se_rpcversh; /* rpc program highest version */
197 #define isrpcservice(sep) ((sep)->se_rpcversl != 0)
199 #define isrpcservice(sep) 0
201 pid_t se_wait; /* single threaded server */
202 short se_checked; /* looked at during merge */
203 char *se_user; /* user name to run as */
204 char *se_group; /* group name to run as */
205 #ifdef INETD_FEATURE_ENABLED
206 const struct builtin *se_bi; /* if built-in, description */
208 char *se_server; /* server program */
210 char *se_argv[MAXARGV + 1]; /* program arguments */
211 int se_fd; /* open descriptor */
214 struct sockaddr se_un_ctrladdr;
215 struct sockaddr_in se_un_ctrladdr_in;
216 #ifdef CONFIG_FEATURE_IPV6
217 struct sockaddr_in6 se_un_ctrladdr_in6;
219 struct sockaddr_un se_un_ctrladdr_un;
220 } se_un; /* bound address */
221 #define se_ctrladdr se_un.se_un_ctrladdr
222 #define se_ctrladdr_in se_un.se_un_ctrladdr_in
223 #define se_ctrladdr_in6 se_un.se_un_ctrladdr_in6
224 #define se_ctrladdr_un se_un.se_un_ctrladdr_un
225 int se_ctrladdr_size;
226 int se_max; /* max # of instances of this service */
227 int se_count; /* number started since se_time */
228 struct timeval se_time; /* start of se_count */
229 struct servtab *se_next;
232 static servtab_t *servtab;
234 #ifdef INETD_FEATURE_ENABLED
237 const char *bi_service; /* internally provided service name */
238 int bi_socktype; /* type of socket supported */
239 short bi_fork; /* 1 if should fork before call */
240 short bi_wait; /* 1 if should wait for child */
241 void (*bi_fn) (int, servtab_t *);
244 /* Echo received data */
245 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
246 static void echo_stream (int, servtab_t *);
247 static void echo_dg (int, servtab_t *);
249 /* Internet /dev/null */
250 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
251 static void discard_stream (int, servtab_t *);
252 static void discard_dg (int, servtab_t *);
254 /* Return 32 bit time since 1900 */
255 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
256 static void machtime_stream (int, servtab_t *);
257 static void machtime_dg (int, servtab_t *);
259 /* Return human-readable time */
260 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
261 static void daytime_stream (int, servtab_t *);
262 static void daytime_dg (int, servtab_t *);
264 /* Familiar character generator */
265 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
266 static void chargen_stream (int, servtab_t *);
267 static void chargen_dg (int, servtab_t *);
270 static const struct builtin builtins[] = {
271 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO
272 /* Echo received data */
273 {"echo", SOCK_STREAM, 1, 0, echo_stream,},
274 {"echo", SOCK_DGRAM, 0, 0, echo_dg,},
276 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
277 /* Internet /dev/null */
278 {"discard", SOCK_STREAM, 1, 0, discard_stream,},
279 {"discard", SOCK_DGRAM, 0, 0, discard_dg,},
281 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
282 /* Return 32 bit time since 1900 */
283 {"time", SOCK_STREAM, 0, 0, machtime_stream,},
284 {"time", SOCK_DGRAM, 0, 0, machtime_dg,},
286 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
287 /* Return human-readable time */
288 {"daytime", SOCK_STREAM, 0, 0, daytime_stream,},
289 {"daytime", SOCK_DGRAM, 0, 0, daytime_dg,},
291 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
292 /* Familiar character generator */
293 {"chargen", SOCK_STREAM, 1, 0, chargen_stream,},
294 {"chargen", SOCK_DGRAM, 0, 0, chargen_dg,},
296 {NULL, 0, 0, 0, NULL}
298 #endif /* INETD_FEATURE_ENABLED */
300 static int global_queuelen = 128;
301 static int nsock, maxsock;
302 static fd_set allsock;
303 static int toomany = TOOMANY;
304 static int timingout;
305 static struct servent *sp;
308 static char *CONFIG = _PATH_INETDCONF;
310 static FILE *fconfig;
311 static char line[1024];
312 static char *defhost;
314 /* xstrdup(NULL) returns NULL, but this one
315 * will return newly-allocated "" if called with NULL arg
316 * TODO: audit whether this makes any real difference
318 static char *xxstrdup (char *cp)
320 return xstrdup (cp ? cp : "");
323 static int setconfig (void)
326 defhost = xstrdup ("*");
327 if (fconfig != NULL) {
328 fseek (fconfig, 0L, SEEK_SET);
331 fconfig = fopen (CONFIG, "r");
332 return (fconfig != NULL);
335 static void endconfig (void)
338 (void) fclose (fconfig);
345 #ifdef CONFIG_FEATURE_INETD_RPC
346 static void register_rpc (servtab_t *sep)
349 struct sockaddr_in ir_sin;
353 if ((pp = getprotobyname (sep->se_proto + 4)) == NULL) {
354 bb_perror_msg ("%s: getproto", sep->se_proto);
357 size = sizeof ir_sin;
358 if (getsockname (sep->se_fd, (struct sockaddr *) &ir_sin, &size) < 0) {
359 bb_perror_msg ("%s/%s: getsockname",
360 sep->se_service, sep->se_proto);
364 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
365 (void) pmap_unset (sep->se_rpcprog, n);
366 if (!pmap_set (sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port)))
367 bb_perror_msg ("%s %s: pmap_set: %u %u %u %u",
368 sep->se_service, sep->se_proto,
369 sep->se_rpcprog, n, pp->p_proto, ntohs (ir_sin.sin_port));
373 static void unregister_rpc (servtab_t *sep)
377 for (n = sep->se_rpcversl; n <= sep->se_rpcversh; n++) {
378 if (!pmap_unset (sep->se_rpcprog, n))
379 bb_error_msg ("pmap_unset(%u, %u)", sep->se_rpcprog, n);
382 #endif /* CONFIG_FEATURE_INETD_RPC */
384 static void freeconfig (servtab_t *cp)
388 free (cp->se_hostaddr);
389 free (cp->se_service);
393 free (cp->se_server);
394 for (i = 0; i < MAXARGV; i++)
395 free (cp->se_argv[i]);
398 static int bump_nofile (void)
404 if (getrlimit (RLIMIT_NOFILE, &rl) < 0) {
405 bb_perror_msg ("getrlimit");
408 rl.rlim_cur = MIN (rl.rlim_max, rl.rlim_cur + FD_CHUNK);
409 rl.rlim_cur = MIN (FD_SETSIZE, rl.rlim_cur + FD_CHUNK);
410 if (rl.rlim_cur <= rlim_ofile_cur) {
411 bb_error_msg ("bump_nofile: cannot extend file limit, max = %d",
416 if (setrlimit (RLIMIT_NOFILE, &rl) < 0) {
417 bb_perror_msg ("setrlimit");
421 rlim_ofile_cur = rl.rlim_cur;
425 static void setup (servtab_t *sep)
430 if ((sep->se_fd = socket (sep->se_family, sep->se_socktype, 0)) < 0) {
431 bb_perror_msg ("%s/%s: socket", sep->se_service, sep->se_proto);
434 #define turnon(fd, opt) \
435 setsockopt(fd, SOL_SOCKET, opt, (char *)&on, sizeof (on))
436 if (turnon (sep->se_fd, SO_REUSEADDR) < 0)
437 bb_perror_msg ("setsockopt (SO_REUSEADDR)");
440 #ifdef CONFIG_FEATURE_INETD_RPC
441 if (isrpcservice (sep)) {
445 * for RPC services, attempt to use a reserved port
446 * if they are going to be running as root.
448 * Also, zero out the port for all RPC services; let bind()
451 sep->se_ctrladdr_in.sin_port = 0;
452 if (sep->se_user && (pwd = getpwnam (sep->se_user)) &&
453 pwd->pw_uid == 0 && uid == 0)
454 r = bindresvport (sep->se_fd, &sep->se_ctrladdr_in);
456 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
458 socklen_t len = sep->se_ctrladdr_size;
459 int saveerrno = errno;
461 /* update se_ctrladdr_in.sin_port */
462 r = getsockname (sep->se_fd, &sep->se_ctrladdr, &len);
469 r = bind (sep->se_fd, &sep->se_ctrladdr, sep->se_ctrladdr_size);
471 bb_perror_msg ("%s/%s (%d): bind",
472 sep->se_service, sep->se_proto, sep->se_ctrladdr.sa_family);
481 if (sep->se_socktype == SOCK_STREAM)
482 listen (sep->se_fd, global_queuelen);
484 FD_SET (sep->se_fd, &allsock);
486 if (sep->se_fd > maxsock) {
487 maxsock = sep->se_fd;
488 if ((rlim_t)maxsock > rlim_ofile_cur - FD_MARGIN)
493 static char *nextline (void)
498 if (fgets (line, sizeof (line), fd) == NULL)
500 cp = strchr (line, '\n');
506 static char *skip (char **cpp) /* int report; */
514 /* bb_error_msg ("syntax error in inetd config file"); */
519 while (*cp == ' ' || *cp == '\t')
525 (void) ungetc (c, fconfig);
526 if (c == ' ' || c == '\t')
527 if ((cp = nextline ()))
534 while (*cp && *cp != ' ' && *cp != '\t')
538 /* if ((*cpp = cp) == NULL) */
545 static servtab_t *new_servtab(void)
547 return xmalloc (sizeof (servtab_t));
550 static servtab_t *dupconfig (servtab_t *sep)
555 newtab = new_servtab();
556 memset (newtab, 0, sizeof (servtab_t));
557 newtab->se_service = xstrdup (sep->se_service);
558 newtab->se_socktype = sep->se_socktype;
559 newtab->se_family = sep->se_family;
560 newtab->se_proto = xstrdup (sep->se_proto);
561 #ifdef CONFIG_FEATURE_INETD_RPC
562 newtab->se_rpcprog = sep->se_rpcprog;
563 newtab->se_rpcversl = sep->se_rpcversl;
564 newtab->se_rpcversh = sep->se_rpcversh;
566 newtab->se_wait = sep->se_wait;
567 newtab->se_user = xstrdup (sep->se_user);
568 newtab->se_group = xstrdup (sep->se_group);
569 #ifdef INETD_FEATURE_ENABLED
570 newtab->se_bi = sep->se_bi;
572 newtab->se_server = xstrdup (sep->se_server);
574 for (argc = 0; argc <= MAXARGV; argc++)
575 newtab->se_argv[argc] = xstrdup (sep->se_argv[argc]);
576 newtab->se_max = sep->se_max;
581 static servtab_t *getconfigent (void)
592 /* memset(sep, 0, sizeof *sep); */
594 /* freeconfig(sep); */
596 while ((cp = nextline ()) && *cp == '#');
602 memset ((char *) sep, 0, sizeof *sep);
609 /* Check for a host name. */
610 hostdelim = strrchr (arg, ':');
613 sep->se_hostaddr = xstrdup (arg);
616 * If the line is of the form `host:', then just change the
617 * default host for the following lines.
623 defhost = sep->se_hostaddr;
628 sep->se_hostaddr = xxstrdup (defhost);
630 sep->se_service = xxstrdup (arg);
633 if (strcmp (arg, "stream") == 0)
634 sep->se_socktype = SOCK_STREAM;
635 else if (strcmp (arg, "dgram") == 0)
636 sep->se_socktype = SOCK_DGRAM;
637 else if (strcmp (arg, "rdm") == 0)
638 sep->se_socktype = SOCK_RDM;
639 else if (strcmp (arg, "seqpacket") == 0)
640 sep->se_socktype = SOCK_SEQPACKET;
641 else if (strcmp (arg, "raw") == 0)
642 sep->se_socktype = SOCK_RAW;
644 sep->se_socktype = -1;
646 sep->se_proto = xxstrdup (skip (&cp));
648 if (strcmp (sep->se_proto, "unix") == 0) {
649 sep->se_family = AF_UNIX;
651 sep->se_family = AF_INET;
652 if (sep->se_proto[strlen (sep->se_proto) - 1] == '6')
653 #ifdef CONFIG_FEATURE_IPV6
654 sep->se_family = AF_INET6;
656 bb_error_msg ("%s: IPV6 not supported", sep->se_proto);
658 if (strncmp (sep->se_proto, "rpc/", 4) == 0) {
659 #ifdef CONFIG_FEATURE_INETD_RPC
663 p = strchr (sep->se_service, '/');
665 bb_error_msg ("%s: no rpc version", sep->se_service);
669 l = strtol (p, &ccp, 0);
670 if (ccp == p || l < 0 || l > INT_MAX) {
672 bb_error_msg ("%s/%s: bad rpc version", sep->se_service, p);
675 sep->se_rpcversl = sep->se_rpcversh = l;
678 l = strtol (p, &ccp, 0);
679 if (ccp == p || l < 0 || l > INT_MAX || l < sep->se_rpcversl || *ccp)
681 sep->se_rpcversh = l;
682 } else if (*ccp != '\0')
685 bb_error_msg ("%s: rpc services not supported", sep->se_service);
694 char *s = strchr (arg, '.');
697 sep->se_max = atoi (s);
699 sep->se_max = toomany;
701 sep->se_wait = strcmp (arg, "wait") == 0;
702 /* if ((arg = skip(&cp, 1)) == NULL) */
704 sep->se_user = xxstrdup (skip (&cp));
705 arg = strchr (sep->se_user, '.');
707 arg = strchr (sep->se_user, ':');
710 sep->se_group = xstrdup (arg);
712 /* if ((arg = skip(&cp, 1)) == NULL) */
715 sep->se_server = xxstrdup (skip (&cp));
716 if (strcmp (sep->se_server, "internal") == 0) {
717 #ifdef INETD_FEATURE_ENABLED
718 const struct builtin *bi;
720 for (bi = builtins; bi->bi_service; bi++)
721 if (bi->bi_socktype == sep->se_socktype &&
722 strcmp (bi->bi_service, sep->se_service) == 0)
724 if (bi->bi_service == 0) {
725 bb_error_msg ("internal service %s unknown", sep->se_service);
729 sep->se_wait = bi->bi_wait;
731 bb_perror_msg ("internal service %s unknown", sep->se_service);
735 #ifdef INETD_FEATURE_ENABLED
740 for (arg = skip (&cp); cp; arg = skip (&cp)) {
742 sep->se_argv[argc++] = xxstrdup (arg);
744 while (argc <= MAXARGV)
745 sep->se_argv[argc++] = NULL;
748 * Now that we've processed the entire line, check if the hostname
749 * specifier was a comma separated list of hostnames. If so
750 * we'll make new entries for each address.
752 while ((hostdelim = strrchr (sep->se_hostaddr, ',')) != NULL) {
753 nsep = dupconfig (sep);
756 * NULL terminate the hostname field of the existing entry,
757 * and make a dup for the new entry.
760 nsep->se_hostaddr = xstrdup (hostdelim);
762 nsep->se_next = sep->se_next;
767 while (nsep != NULL) {
768 nsep->se_checked = 1;
769 if (nsep->se_family == AF_INET) {
770 if (!strcmp (nsep->se_hostaddr, "*"))
771 nsep->se_ctrladdr_in.sin_addr.s_addr = INADDR_ANY;
772 else if (!inet_aton (nsep->se_hostaddr, &nsep->se_ctrladdr_in.sin_addr)) {
775 hp = gethostbyname (nsep->se_hostaddr);
777 bb_error_msg ("%s: unknown host", nsep->se_hostaddr);
778 nsep->se_checked = 0;
780 } else if (hp->h_addrtype != AF_INET) {
781 bb_error_msg ("%s: address isn't an Internet "
782 "address", nsep->se_hostaddr);
783 nsep->se_checked = 0;
788 memmove (&nsep->se_ctrladdr_in.sin_addr,
789 hp->h_addr_list[0], sizeof (struct in_addr));
790 while (hp->h_addr_list[i] != NULL) {
791 psep = dupconfig (nsep);
792 psep->se_hostaddr = xxstrdup (nsep->se_hostaddr);
793 psep->se_checked = 1;
794 memmove (&psep->se_ctrladdr_in.sin_addr,
795 hp->h_addr_list[i], sizeof (struct in_addr));
796 psep->se_ctrladdr_size = sizeof (psep->se_ctrladdr_in);
798 /* Prepend to list, don't want to look up its */
799 /* hostname again. */
806 /* XXX BUG?: is this skip: label supposed to remain? */
808 nsep = nsep->se_next;
812 * Finally, free any entries which failed the gethostbyname
817 while (nsep != NULL) {
820 if (nsep->se_checked == 0) {
826 nsep = nsep->se_next;
827 psep->se_next = nsep;
831 nsep->se_checked = 0;
833 nsep = nsep->se_next;
840 #define Block_Using_Signals(m) do { sigemptyset(&m); \
841 sigaddset(&m, SIGCHLD); \
842 sigaddset(&m, SIGHUP); \
843 sigaddset(&m, SIGALRM); \
844 sigprocmask(SIG_BLOCK, &m, NULL); \
848 static servtab_t *enter (servtab_t *cp)
856 #ifdef CONFIG_FEATURE_INETD_RPC
857 sep->se_rpcprog = -1;
859 Block_Using_Signals(omask);
860 sep->se_next = servtab;
862 sigprocmask(SIG_UNBLOCK, &omask, NULL);
866 static int matchconf (servtab_t *old, servtab_t *new)
868 if (strcmp (old->se_service, new->se_service) != 0)
871 if (strcmp (old->se_hostaddr, new->se_hostaddr) != 0)
874 if (strcmp (old->se_proto, new->se_proto) != 0)
878 * If the new servtab is bound to a specific address, check that the
879 * old servtab is bound to the same entry. If the new service is not
880 * bound to a specific address then the check of se_hostaddr above
884 if (old->se_family == AF_INET && new->se_family == AF_INET &&
885 memcmp (&old->se_ctrladdr_in.sin_addr,
886 &new->se_ctrladdr_in.sin_addr,
887 sizeof (new->se_ctrladdr_in.sin_addr)) != 0)
890 #ifdef CONFIG_FEATURE_IPV6
891 if (old->se_family == AF_INET6 && new->se_family == AF_INET6 &&
892 memcmp (&old->se_ctrladdr_in6.sin6_addr,
893 &new->se_ctrladdr_in6.sin6_addr,
894 sizeof (new->se_ctrladdr_in6.sin6_addr)) != 0)
900 static void config (int sig ATTRIBUTE_UNUSED)
902 servtab_t *sep, *cp, **sepp;
908 bb_perror_msg ("%s", CONFIG);
911 for (sep = servtab; sep; sep = sep->se_next)
913 cp = getconfigent ();
915 for (sep = servtab; sep; sep = sep->se_next)
916 if (matchconf (sep, cp))
922 #define SWAP(type, a, b) do {type c=(type)a; a=(type)b; b=(type)c;} while (0)
924 Block_Using_Signals(omask);
926 * sep->se_wait may be holding the pid of a daemon
927 * that we're waiting for. If so, don't overwrite
928 * it unless the config file explicitly says don't
932 #ifdef INETD_FEATURE_ENABLED
935 (sep->se_wait == 1 || cp->se_wait == 0))
936 sep->se_wait = cp->se_wait;
937 SWAP (int, cp->se_max, sep->se_max);
938 SWAP (char *, sep->se_user, cp->se_user);
939 SWAP (char *, sep->se_group, cp->se_group);
940 SWAP (char *, sep->se_server, cp->se_server);
941 for (i = 0; i < MAXARGV; i++)
942 SWAP (char *, sep->se_argv[i], cp->se_argv[i]);
945 #ifdef CONFIG_FEATURE_INETD_RPC
946 if (isrpcservice (sep))
947 unregister_rpc (sep);
948 sep->se_rpcversl = cp->se_rpcversl;
949 sep->se_rpcversh = cp->se_rpcversh;
951 sigprocmask(SIG_UNBLOCK, &omask, NULL);
958 switch (sep->se_family) {
960 if (sep->se_fd != -1)
962 (void) unlink (sep->se_service);
963 n = strlen (sep->se_service);
964 if (n > sizeof sep->se_ctrladdr_un.sun_path - 1)
965 n = sizeof sep->se_ctrladdr_un.sun_path - 1;
966 safe_strncpy (sep->se_ctrladdr_un.sun_path, sep->se_service, n + 1);
967 sep->se_ctrladdr_un.sun_family = AF_UNIX;
968 sep->se_ctrladdr_size = n + sizeof sep->se_ctrladdr_un.sun_family;
972 sep->se_ctrladdr_in.sin_family = AF_INET;
973 /* se_ctrladdr_in was set in getconfigent */
974 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in;
976 #ifdef CONFIG_FEATURE_INETD_RPC
977 if (isrpcservice (sep)) {
980 sep->se_rpcprog = atoi (sep->se_service);
981 if (sep->se_rpcprog == 0) {
982 rp = getrpcbyname (sep->se_service);
984 bb_error_msg ("%s: unknown rpc service", sep->se_service);
987 sep->se_rpcprog = rp->r_number;
989 if (sep->se_fd == -1)
991 if (sep->se_fd != -1)
996 u_short port = htons (atoi (sep->se_service));
999 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1000 if (isdigit (protoname[strlen (protoname) - 1]))
1001 protoname[strlen (protoname) - 1] = '\0';
1002 sp = getservbyname (sep->se_service, protoname);
1004 bb_error_msg ("%s/%s: unknown service",
1005 sep->se_service, sep->se_proto);
1010 if (port != sep->se_ctrladdr_in.sin_port) {
1011 sep->se_ctrladdr_in.sin_port = port;
1012 if (sep->se_fd != -1) {
1013 FD_CLR (sep->se_fd, &allsock);
1015 (void) close (sep->se_fd);
1019 if (sep->se_fd == -1)
1023 #ifdef CONFIG_FEATURE_IPV6
1025 sep->se_ctrladdr_in6.sin6_family = AF_INET6;
1026 /* se_ctrladdr_in was set in getconfigent */
1027 sep->se_ctrladdr_size = sizeof sep->se_ctrladdr_in6;
1029 #ifdef CONFIG_FEATURE_INETD_RPC
1030 if (isrpcservice (sep)) {
1033 sep->se_rpcprog = atoi (sep->se_service);
1034 if (sep->se_rpcprog == 0) {
1035 rp = getrpcbyname (sep->se_service);
1037 bb_error_msg ("%s: unknown rpc service", sep->se_service);
1040 sep->se_rpcprog = rp->r_number;
1042 if (sep->se_fd == -1)
1044 if (sep->se_fd != -1)
1049 u_short port = htons (atoi (sep->se_service));
1052 /*XXX*/ strncpy (protoname, sep->se_proto, sizeof (protoname));
1053 if (isdigit (protoname[strlen (protoname) - 1]))
1054 protoname[strlen (protoname) - 1] = '\0';
1055 sp = getservbyname (sep->se_service, protoname);
1057 bb_error_msg ("%s/%s: unknown service",
1058 sep->se_service, sep->se_proto);
1063 if (port != sep->se_ctrladdr_in6.sin6_port) {
1064 sep->se_ctrladdr_in6.sin6_port = port;
1065 if (sep->se_fd != -1) {
1066 FD_CLR (sep->se_fd, &allsock);
1068 (void) close (sep->se_fd);
1072 if (sep->se_fd == -1)
1076 #endif /* CONFIG_FEATURE_IPV6 */
1079 if (cp->se_next != NULL) {
1080 servtab_t *tmp = cp;
1086 cp = getconfigent ();
1091 * Purge anything not looked at above.
1093 Block_Using_Signals(omask);
1095 while ((sep = *sepp)) {
1096 if (sep->se_checked) {
1097 sepp = &sep->se_next;
1100 *sepp = sep->se_next;
1101 if (sep->se_fd != -1) {
1102 FD_CLR (sep->se_fd, &allsock);
1104 (void) close (sep->se_fd);
1106 #ifdef CONFIG_FEATURE_INETD_RPC
1107 if (isrpcservice (sep))
1108 unregister_rpc (sep);
1110 if (sep->se_family == AF_UNIX)
1111 (void) unlink (sep->se_service);
1115 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1119 static void reapchild (int sig ATTRIBUTE_UNUSED)
1122 int save_errno = errno, status;
1126 pid = wait3 (&status, WNOHANG, NULL);
1129 for (sep = servtab; sep; sep = sep->se_next)
1130 if (sep->se_wait == pid) {
1131 if (WIFEXITED (status) && WEXITSTATUS (status))
1132 bb_error_msg("%s: exit status 0x%x",
1133 sep->se_server, WEXITSTATUS (status));
1134 else if (WIFSIGNALED (status))
1135 bb_error_msg("%s: exit signal 0x%x",
1136 sep->se_server, WTERMSIG (status));
1138 FD_SET (sep->se_fd, &allsock);
1145 static void retry (int sig ATTRIBUTE_UNUSED)
1150 for (sep = servtab; sep; sep = sep->se_next) {
1151 if (sep->se_fd == -1) {
1152 switch (sep->se_family) {
1155 #ifdef CONFIG_FEATURE_IPV6
1159 #ifdef CONFIG_FEATURE_INETD_RPC
1160 if (sep->se_fd != -1 && isrpcservice (sep))
1169 static void goaway (int sig ATTRIBUTE_UNUSED)
1173 /* XXX signal race walking sep list */
1174 for (sep = servtab; sep; sep = sep->se_next) {
1175 if (sep->se_fd == -1)
1178 switch (sep->se_family) {
1180 (void) unlink (sep->se_service);
1183 #ifdef CONFIG_FEATURE_IPV6
1186 #ifdef CONFIG_FEATURE_INETD_RPC
1187 if (sep->se_wait == 1 && isrpcservice (sep))
1188 unregister_rpc (sep); /* XXX signal race */
1192 (void) close (sep->se_fd);
1194 (void) unlink (_PATH_INETDPID);
1199 #ifdef INETD_SETPROCTITLE
1201 static char *LastArg;
1204 inetd_setproctitle (char *a, int s)
1208 struct sockaddr_in prt_sin;
1212 size = sizeof (prt_sin);
1213 (void) snprintf (buf, sizeof buf, "-%s", a);
1214 if (getpeername (s, (struct sockaddr *) &prt_sin, &size) == 0) {
1215 char *sa = inet_ntoa (prt_sin.sin_addr);
1217 buf[sizeof (buf) - 1 - strlen (sa) - 3] = '\0';
1222 strncpy (cp, buf, LastArg - cp);
1224 while (cp < LastArg)
1231 inetd_main (int argc, char *argv[])
1235 struct group *grp = NULL;
1237 struct sigaction sa, sapipe;
1242 sigset_t omask, wait_mask;
1244 #ifdef INETD_SETPROCTITLE
1245 extern char **environ;
1246 char **envp = environ;
1249 if (envp == 0 || *envp == 0)
1253 LastArg = envp[-1] + strlen (envp[-1]);
1256 openlog (bb_applet_name, LOG_PID | LOG_NOWAIT, LOG_DAEMON);
1258 opt = bb_getopt_ulflags (argc, argv, "R:f", &stoomany);
1262 toomany = strtoul (stoomany, &e, 0);
1263 if (!(toomany >= 0 && *e == '\0')) {
1265 bb_perror_msg ("-R %s: bad value for service invocation rate", stoomany);
1277 bb_error_msg_and_die ("non-root must specify a config file");
1281 /* reexec for vfork() do continue parent */
1282 vfork_daemon_rexec (0, 0, argc, argv, "-f");
1289 logmode = LOGMODE_SYSLOG;
1292 gid_t gid = getgid ();
1294 /* If run by hand, ensure groups vector gets trashed */
1295 setgroups (1, &gid);
1301 if ((fp = fopen (_PATH_INETDPID, "w")) != NULL) {
1302 fprintf (fp, "%u\n", getpid ());
1307 if (getrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0) {
1308 bb_perror_msg ("getrlimit");
1310 rlim_ofile_cur = rlim_ofile.rlim_cur;
1311 if (rlim_ofile_cur == RLIM_INFINITY) /* ! */
1312 rlim_ofile_cur = OPEN_MAX;
1315 memset ((char *) &sa, 0, sizeof (sa));
1316 sigemptyset (&sa.sa_mask);
1317 sigaddset (&sa.sa_mask, SIGALRM);
1318 sigaddset (&sa.sa_mask, SIGCHLD);
1319 sigaddset (&sa.sa_mask, SIGHUP);
1320 sa.sa_handler = retry;
1321 sigaction (SIGALRM, &sa, NULL);
1324 sa.sa_handler = config;
1325 sigaction (SIGHUP, &sa, NULL);
1326 sa.sa_handler = reapchild;
1327 sigaction (SIGCHLD, &sa, NULL);
1328 sa.sa_handler = goaway;
1329 sigaction (SIGTERM, &sa, NULL);
1330 sa.sa_handler = goaway;
1331 sigaction (SIGINT, &sa, NULL);
1332 sa.sa_handler = SIG_IGN;
1333 sigaction (SIGPIPE, &sa, &sapipe);
1334 memset(&wait_mask, 0, sizeof(wait_mask));
1336 /* space for daemons to overwrite environment for ps */
1337 #define DUMMYSIZE 100
1338 char dummy[DUMMYSIZE];
1340 (void) memset (dummy, 'x', DUMMYSIZE - 1);
1341 dummy[DUMMYSIZE - 1] = '\0';
1343 (void) setenv ("inetd_dummy", dummy, 1);
1351 Block_Using_Signals(omask);
1353 sigsuspend (&wait_mask);
1354 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1358 if ((n = select (maxsock + 1, &readable, NULL, NULL, NULL)) <= 0) {
1359 if (n < 0 && errno != EINTR) {
1360 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)) {
1368 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM) {
1369 ctrl = accept (sep->se_fd, NULL, NULL);
1373 bb_perror_msg("accept (for %s)", sep->se_service);
1376 if (sep->se_family == AF_INET && sep->se_socktype == SOCK_STREAM) {
1377 struct sockaddr_in peer;
1378 socklen_t plen = sizeof (peer);
1380 if (getpeername (ctrl, (struct sockaddr *) &peer, &plen) < 0) {
1381 bb_error_msg("could not getpeername");
1385 if (ntohs (peer.sin_port) == 20) {
1386 /* XXX ftp bounce */
1393 Block_Using_Signals(omask);
1395 #ifdef INETD_FEATURE_ENABLED
1396 if (sep->se_bi == 0 || sep->se_bi->bi_fork)
1399 if (sep->se_count++ == 0)
1400 (void) gettimeofday (&sep->se_time, NULL);
1401 else if (toomany > 0 && sep->se_count >= sep->se_max) {
1404 (void) gettimeofday (&now, NULL);
1405 if (now.tv_sec - sep->se_time.tv_sec > CNT_INTVL) {
1409 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1411 if (sep->se_family == AF_INET &&
1412 ntohs (sep->se_ctrladdr_in.sin_port) >= IPPORT_RESERVED) {
1414 * Cannot close it -- there are
1415 * thieves on the system.
1416 * Simply ignore the connection.
1421 bb_error_msg ("%s/%s server failing (looping), service terminated",
1422 sep->se_service, sep->se_proto);
1423 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1425 FD_CLR (sep->se_fd, &allsock);
1426 (void) close (sep->se_fd);
1430 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1441 bb_perror_msg ("fork");
1442 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1444 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1448 if (pid && sep->se_wait) {
1450 FD_CLR (sep->se_fd, &allsock);
1453 sigprocmask(SIG_UNBLOCK, &omask, NULL);
1455 #ifdef INETD_FEATURE_ENABLED
1457 (*sep->se_bi->bi_fn) (ctrl, sep);
1461 if ((pwd = getpwnam (sep->se_user)) == NULL) {
1462 bb_error_msg ("getpwnam: %s: no such user", sep->se_user);
1463 if (sep->se_socktype != SOCK_STREAM)
1464 recv (0, buf, sizeof (buf), 0);
1468 bb_perror_msg ("%s: setsid", sep->se_service);
1469 if (sep->se_group && (grp = getgrnam (sep->se_group)) == NULL) {
1470 bb_error_msg ("getgrnam: %s: no such group", sep->se_group);
1471 if (sep->se_socktype != SOCK_STREAM)
1472 recv (0, buf, sizeof (buf), 0);
1476 /* a user running private inetd */
1477 if (uid != pwd->pw_uid)
1479 } else if (pwd->pw_uid) {
1480 if (sep->se_group) {
1481 pwd->pw_gid = grp->gr_gid;
1483 xsetgid ((gid_t) pwd->pw_gid);
1484 initgroups (pwd->pw_name, pwd->pw_gid);
1485 xsetuid((uid_t) pwd->pw_uid);
1486 } else if (sep->se_group) {
1487 xsetgid(grp->gr_gid);
1488 setgroups (1, &grp->gr_gid);
1494 if (rlim_ofile.rlim_cur != rlim_ofile_cur)
1495 if (setrlimit (RLIMIT_NOFILE, &rlim_ofile) < 0)
1496 bb_perror_msg ("setrlimit");
1498 for (tmpint = rlim_ofile_cur - 1; --tmpint > 2;)
1499 (void) close (tmpint);
1500 sigaction (SIGPIPE, &sapipe, NULL);
1501 execv (sep->se_server, sep->se_argv);
1502 if (sep->se_socktype != SOCK_STREAM)
1503 recv (0, buf, sizeof (buf), 0);
1504 bb_perror_msg ("execv %s", sep->se_server);
1508 if (!sep->se_wait && sep->se_socktype == SOCK_STREAM)
1515 * Internet services provided internally by inetd:
1517 #define BUFSIZE 4096
1519 #if defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO) || \
1520 defined(CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN) || \
1521 defined(CONFIG_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 #ifdef CONFIG_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);
1543 while ((i = read (s, buffer, sizeof (buffer))) > 0 &&
1544 write (s, buffer, i) > 0);
1548 /* Echo service -- echo data back */
1551 echo_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1553 char buffer[BUFSIZE];
1556 /* struct sockaddr_storage ss; */
1560 if ((i = recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size)) < 0)
1562 if (dg_badinput ((struct sockaddr_in *) &sa))
1564 (void) sendto (s, buffer, i, 0, &sa, sizeof (sa));
1566 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_ECHO */
1568 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD
1569 /* Discard service -- ignore data */
1572 discard_stream (int s, servtab_t *sep)
1574 char buffer[BUFSIZE];
1576 inetd_setproctitle (sep->se_service, s);
1577 while ((errno = 0, read (s, buffer, sizeof (buffer)) > 0) ||
1582 /* Discard service -- ignore data */
1585 discard_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1587 char buffer[BUFSIZE];
1589 (void) read (s, buffer, sizeof (buffer));
1591 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DISCARD */
1594 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN
1596 static char ring[128];
1597 static char *endring;
1606 for (i = 0; i <= 128; ++i)
1611 /* Character generator */
1614 chargen_stream (int s, servtab_t *sep)
1618 char text[LINESIZ + 2];
1620 inetd_setproctitle (sep->se_service, s);
1627 text[LINESIZ] = '\r';
1628 text[LINESIZ + 1] = '\n';
1630 if ((len = endring - rs) >= LINESIZ)
1631 memmove (text, rs, LINESIZ);
1633 memmove (text, rs, len);
1634 memmove (text + len, ring, LINESIZ - len);
1636 if (++rs == endring)
1638 if (write (s, text, sizeof (text)) != sizeof (text))
1644 /* Character generator */
1647 chargen_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1649 /* struct sockaddr_storage ss; */
1653 char text[LINESIZ + 2];
1662 if (recvfrom (s, text, sizeof (text), 0, &sa, &size) < 0)
1664 if (dg_badinput ((struct sockaddr_in *) &sa))
1667 if ((len = endring - rs) >= LINESIZ)
1668 memmove (text, rs, LINESIZ);
1670 memmove (text, rs, len);
1671 memmove (text + len, ring, LINESIZ - len);
1673 if (++rs == endring)
1675 text[LINESIZ] = '\r';
1676 text[LINESIZ + 1] = '\n';
1677 (void) sendto (s, text, sizeof (text), 0, &sa, sizeof (sa));
1679 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_CHARGEN */
1682 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME
1684 * Return a machine readable date and time, in the form of the
1685 * number of seconds since midnight, Jan 1, 1900. Since gettimeofday
1686 * returns the number of seconds since midnight, Jan 1, 1970,
1687 * we must add 2208988800 seconds to this figure to make up for
1688 * some seventy years Bell Labs was asleep.
1691 static u_int machtime (void)
1695 if (gettimeofday (&tv, NULL) < 0) {
1696 fprintf (stderr, "Unable to get time of day\n");
1699 return (htonl ((u_int) tv.tv_sec + 2208988800UL));
1704 machtime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1708 result = machtime ();
1709 (void) write (s, (char *) &result, sizeof (result));
1714 machtime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1717 /* struct sockaddr_storage ss; */
1719 struct sockaddr_in *dg_sin;
1723 if (recvfrom (s, (char *) &result, sizeof (result), 0, &sa, &size) < 0)
1725 /* if (dg_badinput((struct sockaddr *)&ss)) */
1726 dg_sin = (struct sockaddr_in *) &sa;
1727 if (dg_sin->sin_addr.s_addr == htonl (INADDR_BROADCAST) ||
1728 ntohs (dg_sin->sin_port) < IPPORT_RESERVED / 2)
1730 result = machtime ();
1731 (void) sendto (s, (char *) &result, sizeof (result), 0, &sa, sizeof (sa));
1733 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_TIME */
1736 #ifdef CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME
1737 /* Return human-readable time of day */
1739 static void daytime_stream (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1746 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1747 (void) write (s, buffer, strlen (buffer));
1750 /* Return human-readable time of day */
1753 daytime_dg (int s, servtab_t *sep ATTRIBUTE_UNUSED)
1757 /* struct sockaddr_storage ss; */
1761 t = time ((time_t *) 0);
1764 if (recvfrom (s, buffer, sizeof (buffer), 0, &sa, &size) < 0)
1766 if (dg_badinput ((struct sockaddr_in *) &sa))
1768 (void) sprintf (buffer, "%.24s\r\n", ctime (&t));
1769 (void) sendto (s, buffer, strlen (buffer), 0, &sa, sizeof (sa));
1771 #endif /* CONFIG_FEATURE_INETD_SUPPORT_BUILTIN_DAYTIME */