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1 /* $NetBSD: rlogind.c,v 1.38 2008/07/20 01:09:07 lukem Exp $ */
3 /*
4 * Copyright (C) 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by WIDE Project and
18 * its contributors.
19 * 4. Neither the name of the project nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
36 /*-
37 * Copyright (c) 1983, 1988, 1989, 1993
38 * The Regents of the University of California. All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
42 * are met:
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
65 #include <sys/cdefs.h>
66 #ifndef lint
67 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1989, 1993\
68 The Regents of the University of California. All rights reserved.");
69 #if 0
70 static char sccsid[] = "@(#)rlogind.c 8.2 (Berkeley) 4/28/95";
71 #else
72 __RCSID("$NetBSD: rlogind.c,v 1.38 2008/07/20 01:09:07 lukem Exp $");
73 #endif
74 #endif /* not lint */
77 * remote login server:
78 * \0
79 * remuser\0
80 * locuser\0
81 * terminal_type/speed\0
82 * data
85 #include <sys/param.h>
86 #include <sys/stat.h>
87 #include <sys/ioctl.h>
88 #include <signal.h>
89 #include <termios.h>
90 #include <poll.h>
91 #include <vis.h>
93 #include <sys/socket.h>
94 #include <netinet/in.h>
95 #include <netinet/in_systm.h>
96 #include <netinet/ip.h>
97 #include <arpa/inet.h>
98 #include <netdb.h>
100 #include <pwd.h>
101 #include <syslog.h>
102 #include <errno.h>
103 #include <stdio.h>
104 #include <unistd.h>
105 #include <stdlib.h>
106 #include <string.h>
107 #include <util.h>
108 #include "pathnames.h"
110 #ifndef TIOCPKT_WINDOW
111 #define TIOCPKT_WINDOW 0x80
112 #endif
114 #define OPTIONS "alnL"
116 char *env[2];
117 #define NMAX 30
118 char lusername[NMAX+1], rusername[NMAX+1];
119 static char term[64] = "TERM=";
120 #define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */
121 int keepalive = 1;
122 int check_all = 0;
123 int log_success = 0;
125 struct passwd *pwd;
127 void doit __P((int, struct sockaddr_storage *));
128 int control __P((int, char *, int));
129 void protocol __P((int, int));
130 void cleanup __P((int));
131 void fatal __P((int, const char *, int));
132 int do_rlogin __P((struct sockaddr *, char *));
133 void getstr __P((char *, int, const char *));
134 void setup_term __P((int));
135 #if 0
136 int do_krb_login __P((union sockunion *));
137 #endif
138 void usage __P((void));
139 int local_domain __P((char *));
140 char *topdomain __P((char *));
141 int main __P((int, char *[]));
143 extern int __check_rhosts_file;
144 extern char *__rcmd_errstr; /* syslog hook from libc/net/rcmd.c */
145 extern char **environ;
148 main(argc, argv)
149 int argc;
150 char *argv[];
152 struct sockaddr_storage from;
153 int ch, on;
154 socklen_t fromlen = sizeof(from);
156 openlog("rlogind", LOG_PID, LOG_AUTH);
158 opterr = 0;
159 while ((ch = getopt(argc, argv, OPTIONS)) != -1)
160 switch (ch) {
161 case 'a':
162 check_all = 1;
163 break;
164 case 'l':
165 __check_rhosts_file = 0;
166 break;
167 case 'n':
168 keepalive = 0;
169 break;
170 case 'L':
171 log_success = 1;
172 break;
173 case '?':
174 default:
175 usage();
176 break;
178 argc -= optind;
179 argv += optind;
181 if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
182 syslog(LOG_ERR,"Can't get peer name of remote host: %m");
183 fatal(STDERR_FILENO, "Can't get peer name of remote host", 1);
185 #ifdef INET6
186 if (from.ss_family == AF_INET6 &&
187 IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&from)->sin6_addr) &&
188 sizeof(struct sockaddr_in) <= sizeof(from)) {
189 struct sockaddr_in sin4;
190 struct sockaddr_in6 *sin6;
191 const int off = sizeof(struct sockaddr_in6) -
192 sizeof(struct sockaddr_in);
194 sin6 = (struct sockaddr_in6 *)&from;
195 memset(&sin4, 0, sizeof(sin4));
196 sin4.sin_family = AF_INET;
197 sin4.sin_len = sizeof(struct sockaddr_in);
198 memcpy(&sin4.sin_addr, &sin6->sin6_addr.s6_addr[off],
199 sizeof(sin4.sin_addr));
200 memcpy(&from, &sin4, sizeof(sin4));
202 #else
203 if (from.ss_family == AF_INET6 &&
204 IN6_IS_ADDR_V4MAPPED(&((struct sockaddr_in6 *)&from)->sin6_addr)) {
205 char hbuf[NI_MAXHOST];
206 if (getnameinfo((struct sockaddr *)&from, fromlen, hbuf,
207 sizeof(hbuf), NULL, 0, NI_NUMERICHOST) != 0) {
208 strlcpy(hbuf, "invalid", sizeof(hbuf));
210 syslog(LOG_ERR, "malformed \"from\" address (v4 mapped, %s)\n",
211 hbuf);
212 exit(1);
214 #endif
215 on = 1;
216 if (keepalive &&
217 setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0)
218 syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
219 #if defined(IP_TOS)
220 if (from.ss_family == AF_INET) {
221 on = IPTOS_LOWDELAY;
222 if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
223 syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
225 #endif
226 doit(0, &from);
227 /* NOTREACHED */
228 #ifdef __GNUC__
229 exit(0);
230 #endif
233 int child;
234 int netf;
235 char line[MAXPATHLEN];
236 int confirmed;
238 struct winsize win = { 0, 0, 0, 0 };
241 void
242 doit(f, fromp)
243 int f;
244 struct sockaddr_storage *fromp;
246 int master, pid, on = 1;
247 int authenticated = 0;
248 char *hostname;
249 char hostnamebuf[2 * MAXHOSTNAMELEN + 1];
250 char hostaddrbuf[sizeof(*fromp) * 4 + 1];
251 char c;
252 char naddr[NI_MAXHOST];
253 char saddr[NI_MAXHOST];
254 char raddr[NI_MAXHOST];
255 int af = fromp->ss_family;
256 u_int16_t *portp;
257 struct addrinfo hints, *res, *res0;
258 int gaierror;
259 socklen_t fromlen = fromp->ss_len > sizeof(*fromp)
260 ? sizeof(*fromp) : fromp->ss_len;
261 const int niflags = NI_NUMERICHOST | NI_NUMERICSERV;
263 alarm(60);
264 read(f, &c, 1);
266 if (c != 0)
267 exit(1);
269 alarm(0);
270 switch (af) {
271 case AF_INET:
272 portp = &((struct sockaddr_in *)fromp)->sin_port;
273 break;
274 #ifdef INET6
275 case AF_INET6:
276 portp = &((struct sockaddr_in6 *)fromp)->sin6_port;
277 break;
278 #endif
279 default:
280 syslog(LOG_ERR, "malformed \"from\" address (af %d)\n", af);
281 exit(1);
283 if (getnameinfo((struct sockaddr *)fromp, fromlen,
284 naddr, sizeof(naddr), NULL, 0, niflags) != 0) {
285 syslog(LOG_ERR, "malformed \"from\" address (af %d)\n", af);
286 exit(1);
289 if (getnameinfo((struct sockaddr *)fromp, fromlen,
290 saddr, sizeof(saddr), NULL, 0, NI_NAMEREQD) == 0) {
292 * If name returned by getnameinfo is in our domain,
293 * attempt to verify that we haven't been fooled by someone
294 * in a remote net; look up the name and check that this
295 * address corresponds to the name.
297 hostname = saddr;
298 res0 = NULL;
299 if (check_all || local_domain(saddr)) {
300 strlcpy(hostnamebuf, saddr, sizeof(hostnamebuf));
301 memset(&hints, 0, sizeof(hints));
302 hints.ai_family = fromp->ss_family;
303 hints.ai_socktype = SOCK_STREAM;
304 hints.ai_flags = AI_CANONNAME;
305 gaierror = getaddrinfo(hostnamebuf, "0", &hints, &res0);
306 if (gaierror) {
307 syslog(LOG_NOTICE,
308 "Couldn't look up address for %s: %s",
309 hostnamebuf, gai_strerror(gaierror));
310 hostname = naddr;
311 } else {
312 for (res = res0; res; res = res->ai_next) {
313 if (res->ai_family != fromp->ss_family)
314 continue;
315 if (res->ai_addrlen != fromp->ss_len)
316 continue;
317 if (getnameinfo(res->ai_addr,
318 res->ai_addrlen,
319 raddr, sizeof(raddr), NULL, 0,
320 niflags) == 0
321 && strcmp(naddr, raddr) == 0) {
322 hostname = res->ai_canonname
323 ? res->ai_canonname
324 : saddr;
325 break;
328 if (res == NULL) {
329 syslog(LOG_NOTICE,
330 "Host addr %s not listed for host %s",
331 naddr, res0->ai_canonname
332 ? res0->ai_canonname
333 : saddr);
334 hostname = naddr;
338 strlcpy(hostnamebuf, hostname, sizeof(hostnamebuf));
339 hostname = hostnamebuf;
340 if (res0)
341 freeaddrinfo(res0);
342 } else {
343 strlcpy(hostnamebuf, naddr, sizeof(hostnamebuf));
344 hostname = hostnamebuf;
347 if (ntohs(*portp) >= IPPORT_RESERVED ||
348 ntohs(*portp) < IPPORT_RESERVED/2) {
349 syslog(LOG_NOTICE, "Connection from %s on illegal port",
350 naddr);
351 fatal(f, "Permission denied", 0);
353 #ifdef IP_OPTIONS
354 if (fromp->ss_family == AF_INET) {
355 u_char optbuf[BUFSIZ/3], *cp;
356 char lbuf[BUFSIZ], *lp, *ep;
357 socklen_t optsize = sizeof(optbuf);
358 int ipproto;
359 struct protoent *ip;
361 if ((ip = getprotobyname("ip")) != NULL)
362 ipproto = ip->p_proto;
363 else
364 ipproto = IPPROTO_IP;
365 if (getsockopt(0, ipproto, IP_OPTIONS, (char *)optbuf,
366 &optsize) == 0 && optsize != 0) {
367 lp = lbuf;
368 ep = lbuf + sizeof(lbuf);
369 for (cp = optbuf; optsize > 0; cp++, optsize--, lp += 3)
370 snprintf(lp, ep - lp, " %2.2x", *cp);
371 syslog(LOG_NOTICE,
372 "Connection received using IP options (ignored):%s",
373 lbuf);
374 if (setsockopt(0, ipproto, IP_OPTIONS,
375 (char *)NULL, optsize) != 0) {
376 syslog(LOG_ERR,
377 "setsockopt IP_OPTIONS NULL: %m");
378 exit(1);
382 #endif
383 if (do_rlogin((struct sockaddr *)fromp, hostname) == 0)
384 authenticated++;
385 if (confirmed == 0) {
386 write(f, "", 1);
387 confirmed = 1; /* we sent the null! */
389 netf = f;
391 pid = forkpty(&master, line, NULL, &win);
392 if (pid < 0) {
393 if (errno == ENOENT)
394 fatal(f, "Out of ptys", 0);
395 else
396 fatal(f, "Forkpty", 1);
398 if (pid == 0) {
399 if (f > 2) /* f should always be 0, but... */
400 (void) close(f);
401 setup_term(0);
402 (void)strvisx(hostaddrbuf, (const char *)(const void *)fromp,
403 sizeof(*fromp), VIS_WHITE);
404 if (authenticated)
405 execl(_PATH_LOGIN, "login", "-p",
406 "-h", hostname, "-a", hostaddrbuf,
407 "-f", "--", lusername, (char *)0);
408 else
409 execl(_PATH_LOGIN, "login", "-p",
410 "-h", hostname, "-a", hostaddrbuf,
411 "--", lusername, (char *)0);
412 fatal(STDERR_FILENO, _PATH_LOGIN, 1);
413 /*NOTREACHED*/
415 ioctl(f, FIONBIO, &on);
416 ioctl(master, FIONBIO, &on);
417 ioctl(master, TIOCPKT, &on);
418 signal(SIGCHLD, cleanup);
419 protocol(f, master);
420 signal(SIGCHLD, SIG_IGN);
421 cleanup(0);
424 char magic[2] = { 0377, 0377 };
425 char oobdata[] = {TIOCPKT_WINDOW};
428 * Handle a "control" request (signaled by magic being present)
429 * in the data stream. For now, we are only willing to handle
430 * window size changes.
433 control(pty, cp, n)
434 int pty;
435 char *cp;
436 int n;
438 struct winsize w;
440 if (n < (int)(4+sizeof (w)) || cp[2] != 's' || cp[3] != 's')
441 return (0);
442 oobdata[0] &= ~TIOCPKT_WINDOW; /* we know he heard */
443 memmove(&w, cp+4, sizeof(w));
444 w.ws_row = ntohs(w.ws_row);
445 w.ws_col = ntohs(w.ws_col);
446 w.ws_xpixel = ntohs(w.ws_xpixel);
447 w.ws_ypixel = ntohs(w.ws_ypixel);
448 (void)ioctl(pty, TIOCSWINSZ, &w);
449 return (4+sizeof (w));
453 * rlogin "protocol" machine.
455 void
456 protocol(f, p)
457 int f, p;
459 char pibuf[1024+1], fibuf[1024], *pbp = NULL, *fbp = NULL;
460 /* XXX gcc above */
461 int pcc = 0, fcc = 0;
462 int cc, nfd;
463 char cntl;
464 struct pollfd set[2];
467 * Must ignore SIGTTOU, otherwise we'll stop
468 * when we try and set slave pty's window shape
469 * (our controlling tty is the master pty).
471 (void) signal(SIGTTOU, SIG_IGN);
472 send(f, oobdata, 1, MSG_OOB); /* indicate new rlogin */
473 set[0].fd = p;
474 set[1].fd = f;
475 for (;;) {
476 set[0].events = POLLPRI;
477 set[1].events = 0;
478 if (fcc)
479 set[0].events |= POLLOUT;
480 else
481 set[1].events |= POLLIN;
482 if (pcc >= 0) {
483 if (pcc)
484 set[1].events |= POLLOUT;
485 else
486 set[0].events |= POLLIN;
488 if ((nfd = poll(set, 2, INFTIM)) < 0) {
489 if (errno == EINTR)
490 continue;
491 fatal(f, "poll", 1);
493 if (nfd == 0) {
494 /* shouldn't happen... */
495 sleep(5);
496 continue;
498 #define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))
499 if (set[0].revents & POLLPRI) {
500 cc = read(p, &cntl, 1);
501 if (cc == 1 && pkcontrol(cntl)) {
502 cntl |= oobdata[0];
503 send(f, &cntl, 1, MSG_OOB);
504 if (cntl & TIOCPKT_FLUSHWRITE)
505 pcc = 0;
508 if (set[1].revents & POLLIN) {
509 fcc = read(f, fibuf, sizeof(fibuf));
510 if (fcc < 0 && errno == EWOULDBLOCK)
511 fcc = 0;
512 else {
513 char *cp;
514 int left, n;
516 if (fcc <= 0)
517 break;
518 fbp = fibuf;
520 top:
521 for (cp = fibuf; cp < fibuf+fcc-1; cp++)
522 if (cp[0] == magic[0] &&
523 cp[1] == magic[1]) {
524 left = fcc - (cp-fibuf);
525 n = control(p, cp, left);
526 if (n) {
527 left -= n;
528 if (left > 0)
529 memmove(cp,
530 cp+n,
531 left);
532 fcc -= n;
533 goto top; /* n^2 */
539 if (set[0].revents & POLLOUT && fcc > 0) {
540 cc = write(p, fbp, fcc);
541 if (cc > 0) {
542 fcc -= cc;
543 fbp += cc;
547 if (set[0].revents & POLLIN) {
548 pcc = read(p, pibuf, sizeof (pibuf));
549 pbp = pibuf;
550 if (pcc < 0 && errno == EWOULDBLOCK)
551 pcc = 0;
552 else if (pcc <= 0)
553 break;
554 else if (pibuf[0] == 0) {
555 pbp++, pcc--;
556 } else {
557 if (pkcontrol(pibuf[0])) {
558 pibuf[0] |= oobdata[0];
559 send(f, &pibuf[0], 1, MSG_OOB);
561 pcc = 0;
564 if (set[1].revents & POLLOUT && pcc > 0) {
565 cc = write(f, pbp, pcc);
566 if (cc > 0) {
567 pcc -= cc;
568 pbp += cc;
574 void
575 cleanup(signo)
576 int signo;
578 char *p, c;
580 p = line + sizeof(_PATH_DEV) - 1;
581 #ifdef SUPPORT_UTMP
582 if (logout(p))
583 logwtmp(p, "", "");
584 #endif
585 #ifdef SUPPORT_UTMPX
586 if (logoutx(p, 0, DEAD_PROCESS))
587 logwtmpx(p, "", "", 0, DEAD_PROCESS);
588 #endif
589 (void)chmod(line, 0666);
590 (void)chown(line, 0, 0);
591 c = *p; *p = 'p';
592 (void)chmod(line, 0666);
593 (void)chown(line, 0, 0);
594 *p = c;
595 if (ttyaction(line, "rlogind", "root"))
596 syslog(LOG_ERR, "%s: ttyaction failed", line);
597 shutdown(netf, 2);
598 exit(1);
601 void
602 fatal(f, msg, syserr)
603 int f;
604 const char *msg;
605 int syserr;
607 int len;
608 char buf[BUFSIZ], *bp, *ep;
610 bp = buf;
611 ep = buf + sizeof(buf);
614 * Prepend binary one to message if we haven't sent
615 * the magic null as confirmation.
617 if (!confirmed)
618 *bp++ = '\001'; /* error indicator */
619 if (syserr)
620 len = snprintf(bp, ep - bp, "rlogind: %s: %s.\r\n",
621 msg, strerror(errno));
622 else
623 len = snprintf(bp, ep - bp, "rlogind: %s.\r\n", msg);
624 (void) write(f, buf, bp + len - buf);
625 exit(1);
629 do_rlogin(dest, host)
630 struct sockaddr *dest;
631 char *host;
633 int retval;
635 getstr(rusername, sizeof(rusername), "remuser too long");
636 getstr(lusername, sizeof(lusername), "locuser too long");
637 getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long");
639 pwd = getpwnam(lusername);
640 if (pwd == NULL) {
641 syslog(LOG_INFO,
642 "%s@%s as %s: unknown login.", rusername, host, lusername);
643 return (-1);
646 retval = iruserok_sa(dest, dest->sa_len, pwd->pw_uid == 0, rusername,
647 lusername);
648 /* XXX put inet_ntoa(dest->sin_addr.s_addr) into all messages below */
649 if (retval == 0) {
650 if (log_success)
651 syslog(LOG_INFO, "%s@%s as %s: iruserok succeeded",
652 rusername, host, lusername);
653 } else {
654 if (__rcmd_errstr)
655 syslog(LOG_INFO, "%s@%s as %s: iruserok failed (%s)",
656 rusername, host, lusername, __rcmd_errstr);
657 else
658 syslog(LOG_INFO, "%s@%s as %s: iruserok failed",
659 rusername, host, lusername);
661 return(retval);
664 void
665 getstr(buf, cnt, errmsg)
666 char *buf;
667 int cnt;
668 const char *errmsg;
670 char c;
672 do {
673 if (read(0, &c, 1) != 1)
674 exit(1);
675 if (--cnt < 0)
676 fatal(STDOUT_FILENO, errmsg, 0);
677 *buf++ = c;
678 } while (c != 0);
682 void
683 setup_term(fd)
684 int fd;
686 char *cp = index(term+ENVSIZE, '/');
687 char *speed;
688 struct termios tt;
690 #ifndef notyet
691 tcgetattr(fd, &tt);
692 if (cp) {
693 *cp++ = '\0';
694 speed = cp;
695 cp = index(speed, '/');
696 if (cp)
697 *cp++ = '\0';
698 cfsetspeed(&tt, atoi(speed));
701 tt.c_iflag = TTYDEF_IFLAG;
702 tt.c_oflag = TTYDEF_OFLAG;
703 tt.c_lflag = TTYDEF_LFLAG;
704 tcsetattr(fd, TCSAFLUSH, &tt);
705 #else
706 if (cp) {
707 *cp++ = '\0';
708 speed = cp;
709 cp = index(speed, '/');
710 if (cp)
711 *cp++ = '\0';
712 tcgetattr(fd, &tt);
713 cfsetspeed(&tt, atoi(speed));
714 tcsetattr(fd, TCSAFLUSH, &tt);
716 #endif
718 env[0] = term;
719 env[1] = 0;
720 environ = env;
724 void
725 usage()
727 syslog(LOG_ERR, "usage: rlogind [-alnL]");
731 * Check whether host h is in our local domain,
732 * defined as sharing the last two components of the domain part,
733 * or the entire domain part if the local domain has only one component.
734 * If either name is unqualified (contains no '.'),
735 * assume that the host is local, as it will be
736 * interpreted as such.
739 local_domain(h)
740 char *h;
742 char localhost[MAXHOSTNAMELEN + 1];
743 char *p1, *p2;
745 localhost[0] = 0;
746 (void) gethostname(localhost, sizeof(localhost));
747 localhost[sizeof(localhost) - 1] = '\0';
748 p1 = topdomain(localhost);
749 p2 = topdomain(h);
750 if (p1 == NULL || p2 == NULL || !strcasecmp(p1, p2))
751 return (1);
752 return (0);
755 char *
756 topdomain(h)
757 char *h;
759 char *p;
760 char *maybe = NULL;
761 int dots = 0;
763 for (p = h + strlen(h); p >= h; p--) {
764 if (*p == '.') {
765 if (++dots == 2)
766 return (p);
767 maybe = p;
770 return (maybe);