rlogind.c revision 1.35
1 /* $NetBSD: rlogind.c,v 1.35 2004/11/15 21:01:18 christos Exp $ */ 2 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. 22 * 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. 34 */ 35 36 /*- 37 * Copyright (c) 1983, 1988, 1989, 1993 38 * The Regents of the University of California. All rights reserved. 39 * 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. 51 * 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. 63 */ 64 65 #include <sys/cdefs.h> 66 #ifndef lint 67 __COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1989, 1993\n\ 68 The Regents of the University of California. All rights reserved.\n"); 69 #if 0 70 static char sccsid[] = "@(#)rlogind.c 8.2 (Berkeley) 4/28/95"; 71 #else 72 __RCSID("$NetBSD: rlogind.c,v 1.35 2004/11/15 21:01:18 christos Exp $"); 73 #endif 74 #endif /* not lint */ 75 76 /* 77 * remote login server: 78 * \0 79 * remuser\0 80 * locuser\0 81 * terminal_type/speed\0 82 * data 83 */ 84 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> 92 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> 99 100 #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" 109 110 #ifndef TIOCPKT_WINDOW 111 #define TIOCPKT_WINDOW 0x80 112 #endif 113 114 #define OPTIONS "alnL" 115 116 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; 124 125 struct passwd *pwd; 126 127 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 *[])); 142 143 extern int __check_rhosts_file; 144 extern char *__rcmd_errstr; /* syslog hook from libc/net/rcmd.c */ 145 extern char **environ; 146 147 int 148 main(argc, argv) 149 int argc; 150 char *argv[]; 151 { 152 struct sockaddr_storage from; 153 int ch, on; 154 socklen_t fromlen = sizeof(from); 155 156 openlog("rlogind", LOG_PID, LOG_AUTH); 157 158 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; 177 } 178 argc -= optind; 179 argv += optind; 180 181 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); 184 } 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); 193 194 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)); 201 } 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)); 209 } 210 syslog(LOG_ERR, "malformed \"from\" address (v4 mapped, %s)\n", 211 hbuf); 212 exit(1); 213 } 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"); 224 } 225 #endif 226 doit(0, &from); 227 /* NOTREACHED */ 228 #ifdef __GNUC__ 229 exit(0); 230 #endif 231 } 232 233 int child; 234 int netf; 235 char line[MAXPATHLEN]; 236 int confirmed; 237 238 struct winsize win = { 0, 0, 0, 0 }; 239 240 241 void 242 doit(f, fromp) 243 int f; 244 struct sockaddr_storage *fromp; 245 { 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 #ifdef NI_WITHSCOPEID 262 const int niflags = NI_NUMERICHOST | NI_NUMERICSERV | NI_WITHSCOPEID; 263 #else 264 const int niflags = NI_NUMERICHOST | NI_NUMERICSERV; 265 #endif 266 267 alarm(60); 268 read(f, &c, 1); 269 270 if (c != 0) 271 exit(1); 272 273 alarm(0); 274 switch (af) { 275 case AF_INET: 276 portp = &((struct sockaddr_in *)fromp)->sin_port; 277 break; 278 #ifdef INET6 279 case AF_INET6: 280 portp = &((struct sockaddr_in6 *)fromp)->sin6_port; 281 break; 282 #endif 283 default: 284 syslog(LOG_ERR, "malformed \"from\" address (af %d)\n", af); 285 exit(1); 286 } 287 if (getnameinfo((struct sockaddr *)fromp, fromlen, 288 naddr, sizeof(naddr), NULL, 0, niflags) != 0) { 289 syslog(LOG_ERR, "malformed \"from\" address (af %d)\n", af); 290 exit(1); 291 } 292 293 if (getnameinfo((struct sockaddr *)fromp, fromlen, 294 saddr, sizeof(saddr), NULL, 0, NI_NAMEREQD) == 0) { 295 /* 296 * If name returned by getnameinfo is in our domain, 297 * attempt to verify that we haven't been fooled by someone 298 * in a remote net; look up the name and check that this 299 * address corresponds to the name. 300 */ 301 hostname = saddr; 302 res0 = NULL; 303 if (check_all || local_domain(saddr)) { 304 strlcpy(hostnamebuf, saddr, sizeof(hostnamebuf)); 305 memset(&hints, 0, sizeof(hints)); 306 hints.ai_family = fromp->ss_family; 307 hints.ai_socktype = SOCK_STREAM; 308 hints.ai_flags = AI_CANONNAME; 309 gaierror = getaddrinfo(hostnamebuf, "0", &hints, &res0); 310 if (gaierror) { 311 syslog(LOG_NOTICE, 312 "Couldn't look up address for %s: %s", 313 hostnamebuf, gai_strerror(gaierror)); 314 hostname = naddr; 315 } else { 316 for (res = res0; res; res = res->ai_next) { 317 if (res->ai_family != fromp->ss_family) 318 continue; 319 if (res->ai_addrlen != fromp->ss_len) 320 continue; 321 if (getnameinfo(res->ai_addr, 322 res->ai_addrlen, 323 raddr, sizeof(raddr), NULL, 0, 324 niflags) == 0 325 && strcmp(naddr, raddr) == 0) { 326 hostname = res->ai_canonname 327 ? res->ai_canonname 328 : saddr; 329 break; 330 } 331 } 332 if (res == NULL) { 333 syslog(LOG_NOTICE, 334 "Host addr %s not listed for host %s", 335 naddr, res0->ai_canonname 336 ? res0->ai_canonname 337 : saddr); 338 hostname = naddr; 339 } 340 } 341 } 342 strlcpy(hostnamebuf, hostname, sizeof(hostnamebuf)); 343 hostname = hostnamebuf; 344 if (res0) 345 freeaddrinfo(res0); 346 } else { 347 strlcpy(hostnamebuf, naddr, sizeof(hostnamebuf)); 348 hostname = hostnamebuf; 349 } 350 351 if (ntohs(*portp) >= IPPORT_RESERVED || 352 ntohs(*portp) < IPPORT_RESERVED/2) { 353 syslog(LOG_NOTICE, "Connection from %s on illegal port", 354 naddr); 355 fatal(f, "Permission denied", 0); 356 } 357 #ifdef IP_OPTIONS 358 if (fromp->ss_family == AF_INET) { 359 u_char optbuf[BUFSIZ/3], *cp; 360 char lbuf[BUFSIZ], *lp, *ep; 361 int optsize = sizeof(optbuf), ipproto; 362 struct protoent *ip; 363 364 if ((ip = getprotobyname("ip")) != NULL) 365 ipproto = ip->p_proto; 366 else 367 ipproto = IPPROTO_IP; 368 if (getsockopt(0, ipproto, IP_OPTIONS, (char *)optbuf, 369 &optsize) == 0 && optsize != 0) { 370 lp = lbuf; 371 ep = lbuf + sizeof(lbuf); 372 for (cp = optbuf; optsize > 0; cp++, optsize--, lp += 3) 373 snprintf(lp, ep - lp, " %2.2x", *cp); 374 syslog(LOG_NOTICE, 375 "Connection received using IP options (ignored):%s", 376 lbuf); 377 if (setsockopt(0, ipproto, IP_OPTIONS, 378 (char *)NULL, optsize) != 0) { 379 syslog(LOG_ERR, 380 "setsockopt IP_OPTIONS NULL: %m"); 381 exit(1); 382 } 383 } 384 } 385 #endif 386 if (do_rlogin((struct sockaddr *)fromp, hostname) == 0) 387 authenticated++; 388 if (confirmed == 0) { 389 write(f, "", 1); 390 confirmed = 1; /* we sent the null! */ 391 } 392 netf = f; 393 394 pid = forkpty(&master, line, NULL, &win); 395 if (pid < 0) { 396 if (errno == ENOENT) 397 fatal(f, "Out of ptys", 0); 398 else 399 fatal(f, "Forkpty", 1); 400 } 401 if (pid == 0) { 402 if (f > 2) /* f should always be 0, but... */ 403 (void) close(f); 404 setup_term(0); 405 (void)strvisx(hostaddrbuf, (const char *)(const void *)fromp, 406 sizeof(*fromp), VIS_WHITE); 407 if (authenticated) 408 execl(_PATH_LOGIN, "login", "-p", 409 "-h", hostname, "-a", hostaddrbuf, 410 "-f", "--", lusername, (char *)0); 411 else 412 execl(_PATH_LOGIN, "login", "-p", 413 "-h", hostname, "-a", hostaddrbuf, 414 "--", lusername, (char *)0); 415 fatal(STDERR_FILENO, _PATH_LOGIN, 1); 416 /*NOTREACHED*/ 417 } 418 ioctl(f, FIONBIO, &on); 419 ioctl(master, FIONBIO, &on); 420 ioctl(master, TIOCPKT, &on); 421 signal(SIGCHLD, cleanup); 422 protocol(f, master); 423 signal(SIGCHLD, SIG_IGN); 424 cleanup(0); 425 } 426 427 char magic[2] = { 0377, 0377 }; 428 char oobdata[] = {TIOCPKT_WINDOW}; 429 430 /* 431 * Handle a "control" request (signaled by magic being present) 432 * in the data stream. For now, we are only willing to handle 433 * window size changes. 434 */ 435 int 436 control(pty, cp, n) 437 int pty; 438 char *cp; 439 int n; 440 { 441 struct winsize w; 442 443 if (n < 4+sizeof (w) || cp[2] != 's' || cp[3] != 's') 444 return (0); 445 oobdata[0] &= ~TIOCPKT_WINDOW; /* we know he heard */ 446 memmove(&w, cp+4, sizeof(w)); 447 w.ws_row = ntohs(w.ws_row); 448 w.ws_col = ntohs(w.ws_col); 449 w.ws_xpixel = ntohs(w.ws_xpixel); 450 w.ws_ypixel = ntohs(w.ws_ypixel); 451 (void)ioctl(pty, TIOCSWINSZ, &w); 452 return (4+sizeof (w)); 453 } 454 455 /* 456 * rlogin "protocol" machine. 457 */ 458 void 459 protocol(f, p) 460 int f, p; 461 { 462 char pibuf[1024+1], fibuf[1024], *pbp = NULL, *fbp = NULL; 463 /* XXX gcc above */ 464 int pcc = 0, fcc = 0; 465 int cc, nfd; 466 char cntl; 467 struct pollfd set[2]; 468 469 /* 470 * Must ignore SIGTTOU, otherwise we'll stop 471 * when we try and set slave pty's window shape 472 * (our controlling tty is the master pty). 473 */ 474 (void) signal(SIGTTOU, SIG_IGN); 475 send(f, oobdata, 1, MSG_OOB); /* indicate new rlogin */ 476 set[0].fd = p; 477 set[1].fd = f; 478 for (;;) { 479 set[0].events = POLLPRI; 480 set[1].events = 0; 481 if (fcc) 482 set[0].events |= POLLOUT; 483 else 484 set[1].events |= POLLIN; 485 if (pcc >= 0) { 486 if (pcc) 487 set[1].events |= POLLOUT; 488 else 489 set[0].events |= POLLIN; 490 } 491 if ((nfd = poll(set, 2, INFTIM)) < 0) { 492 if (errno == EINTR) 493 continue; 494 fatal(f, "poll", 1); 495 } 496 if (nfd == 0) { 497 /* shouldn't happen... */ 498 sleep(5); 499 continue; 500 } 501 #define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP)) 502 if (set[0].revents & POLLPRI) { 503 cc = read(p, &cntl, 1); 504 if (cc == 1 && pkcontrol(cntl)) { 505 cntl |= oobdata[0]; 506 send(f, &cntl, 1, MSG_OOB); 507 if (cntl & TIOCPKT_FLUSHWRITE) 508 pcc = 0; 509 } 510 } 511 if (set[1].revents & POLLIN) { 512 fcc = read(f, fibuf, sizeof(fibuf)); 513 if (fcc < 0 && errno == EWOULDBLOCK) 514 fcc = 0; 515 else { 516 char *cp; 517 int left, n; 518 519 if (fcc <= 0) 520 break; 521 fbp = fibuf; 522 523 top: 524 for (cp = fibuf; cp < fibuf+fcc-1; cp++) 525 if (cp[0] == magic[0] && 526 cp[1] == magic[1]) { 527 left = fcc - (cp-fibuf); 528 n = control(p, cp, left); 529 if (n) { 530 left -= n; 531 if (left > 0) 532 memmove(cp, 533 cp+n, 534 left); 535 fcc -= n; 536 goto top; /* n^2 */ 537 } 538 } 539 } 540 } 541 542 if (set[0].revents & POLLOUT && fcc > 0) { 543 cc = write(p, fbp, fcc); 544 if (cc > 0) { 545 fcc -= cc; 546 fbp += cc; 547 } 548 } 549 550 if (set[0].revents & POLLIN) { 551 pcc = read(p, pibuf, sizeof (pibuf)); 552 pbp = pibuf; 553 if (pcc < 0 && errno == EWOULDBLOCK) 554 pcc = 0; 555 else if (pcc <= 0) 556 break; 557 else if (pibuf[0] == 0) { 558 pbp++, pcc--; 559 } else { 560 if (pkcontrol(pibuf[0])) { 561 pibuf[0] |= oobdata[0]; 562 send(f, &pibuf[0], 1, MSG_OOB); 563 } 564 pcc = 0; 565 } 566 } 567 if (set[1].revents & POLLOUT && pcc > 0) { 568 cc = write(f, pbp, pcc); 569 if (cc > 0) { 570 pcc -= cc; 571 pbp += cc; 572 } 573 } 574 } 575 } 576 577 void 578 cleanup(signo) 579 int signo; 580 { 581 char *p, c; 582 583 p = line + sizeof(_PATH_DEV) - 1; 584 #ifdef SUPPORT_UTMP 585 if (logout(p)) 586 logwtmp(p, "", ""); 587 #endif 588 #ifdef SUPPORT_UTMPX 589 if (logoutx(p, 0, DEAD_PROCESS)) 590 logwtmpx(p, "", "", 0, DEAD_PROCESS); 591 #endif 592 (void)chmod(line, 0666); 593 (void)chown(line, 0, 0); 594 c = *p; *p = 'p'; 595 (void)chmod(line, 0666); 596 (void)chown(line, 0, 0); 597 *p = c; 598 if (ttyaction(line, "rlogind", "root")) 599 syslog(LOG_ERR, "%s: ttyaction failed", line); 600 shutdown(netf, 2); 601 exit(1); 602 } 603 604 void 605 fatal(f, msg, syserr) 606 int f; 607 const char *msg; 608 int syserr; 609 { 610 int len; 611 char buf[BUFSIZ], *bp, *ep; 612 613 bp = buf; 614 ep = buf + sizeof(buf); 615 616 /* 617 * Prepend binary one to message if we haven't sent 618 * the magic null as confirmation. 619 */ 620 if (!confirmed) 621 *bp++ = '\001'; /* error indicator */ 622 if (syserr) 623 len = snprintf(bp, ep - bp, "rlogind: %s: %s.\r\n", 624 msg, strerror(errno)); 625 else 626 len = snprintf(bp, ep - bp, "rlogind: %s.\r\n", msg); 627 (void) write(f, buf, bp + len - buf); 628 exit(1); 629 } 630 631 int 632 do_rlogin(dest, host) 633 struct sockaddr *dest; 634 char *host; 635 { 636 int retval; 637 638 getstr(rusername, sizeof(rusername), "remuser too long"); 639 getstr(lusername, sizeof(lusername), "locuser too long"); 640 getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long"); 641 642 pwd = getpwnam(lusername); 643 if (pwd == NULL) { 644 syslog(LOG_INFO, 645 "%s@%s as %s: unknown login.", rusername, host, lusername); 646 return (-1); 647 } 648 649 retval = iruserok_sa(dest, dest->sa_len, pwd->pw_uid == 0, rusername, 650 lusername); 651 /* XXX put inet_ntoa(dest->sin_addr.s_addr) into all messages below */ 652 if (retval == 0) { 653 if (log_success) 654 syslog(LOG_INFO, "%s@%s as %s: iruserok succeeded", 655 rusername, host, lusername); 656 } else { 657 if (__rcmd_errstr) 658 syslog(LOG_INFO, "%s@%s as %s: iruserok failed (%s)", 659 rusername, host, lusername, __rcmd_errstr); 660 else 661 syslog(LOG_INFO, "%s@%s as %s: iruserok failed", 662 rusername, host, lusername); 663 } 664 return(retval); 665 } 666 667 void 668 getstr(buf, cnt, errmsg) 669 char *buf; 670 int cnt; 671 const char *errmsg; 672 { 673 char c; 674 675 do { 676 if (read(0, &c, 1) != 1) 677 exit(1); 678 if (--cnt < 0) 679 fatal(STDOUT_FILENO, errmsg, 0); 680 *buf++ = c; 681 } while (c != 0); 682 } 683 684 685 void 686 setup_term(fd) 687 int fd; 688 { 689 char *cp = index(term+ENVSIZE, '/'); 690 char *speed; 691 struct termios tt; 692 693 #ifndef notyet 694 tcgetattr(fd, &tt); 695 if (cp) { 696 *cp++ = '\0'; 697 speed = cp; 698 cp = index(speed, '/'); 699 if (cp) 700 *cp++ = '\0'; 701 cfsetspeed(&tt, atoi(speed)); 702 } 703 704 tt.c_iflag = TTYDEF_IFLAG; 705 tt.c_oflag = TTYDEF_OFLAG; 706 tt.c_lflag = TTYDEF_LFLAG; 707 tcsetattr(fd, TCSAFLUSH, &tt); 708 #else 709 if (cp) { 710 *cp++ = '\0'; 711 speed = cp; 712 cp = index(speed, '/'); 713 if (cp) 714 *cp++ = '\0'; 715 tcgetattr(fd, &tt); 716 cfsetspeed(&tt, atoi(speed)); 717 tcsetattr(fd, TCSAFLUSH, &tt); 718 } 719 #endif 720 721 env[0] = term; 722 env[1] = 0; 723 environ = env; 724 } 725 726 727 void 728 usage() 729 { 730 syslog(LOG_ERR, "usage: rlogind [-alnL]"); 731 } 732 733 /* 734 * Check whether host h is in our local domain, 735 * defined as sharing the last two components of the domain part, 736 * or the entire domain part if the local domain has only one component. 737 * If either name is unqualified (contains no '.'), 738 * assume that the host is local, as it will be 739 * interpreted as such. 740 */ 741 int 742 local_domain(h) 743 char *h; 744 { 745 char localhost[MAXHOSTNAMELEN + 1]; 746 char *p1, *p2; 747 748 localhost[0] = 0; 749 (void) gethostname(localhost, sizeof(localhost)); 750 localhost[sizeof(localhost) - 1] = '\0'; 751 p1 = topdomain(localhost); 752 p2 = topdomain(h); 753 if (p1 == NULL || p2 == NULL || !strcasecmp(p1, p2)) 754 return (1); 755 return (0); 756 } 757 758 char * 759 topdomain(h) 760 char *h; 761 { 762 char *p; 763 char *maybe = NULL; 764 int dots = 0; 765 766 for (p = h + strlen(h); p >= h; p--) { 767 if (*p == '.') { 768 if (++dots == 2) 769 return (p); 770 maybe = p; 771 } 772 } 773 return (maybe); 774 } 775
Indexes created Wed Sep 24 15:09:51 GMT 2025