| 1 | /*- |
| 2 | * Copyright (c) 1983, 1988, 1989, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#) Copyright (c) 1983, 1988, 1989, 1993 The Regents of the University of California. All rights reserved. |
| 34 | * @(#)rlogind.c 8.1 (Berkeley) 6/4/93 |
| 35 | * $FreeBSD: src/libexec/rlogind/rlogind.c,v 1.29.2.5 2000/12/07 15:02:31 ru Exp $ |
| 36 | * $DragonFly: src/libexec/rlogind/rlogind.c,v 1.3 2003/11/14 03:54:31 dillon Exp $ |
| 37 | */ |
| 38 | |
| 39 | /* |
| 40 | * remote login server: |
| 41 | * \0 |
| 42 | * remuser\0 |
| 43 | * locuser\0 |
| 44 | * terminal_type/speed\0 |
| 45 | * data |
| 46 | */ |
| 47 | |
| 48 | #define FD_SETSIZE 16 /* don't need many bits for select */ |
| 49 | #include <sys/types.h> |
| 50 | #include <sys/param.h> |
| 51 | #include <sys/stat.h> |
| 52 | #include <sys/ioctl.h> |
| 53 | #include <signal.h> |
| 54 | #include <termios.h> |
| 55 | |
| 56 | #include <sys/socket.h> |
| 57 | #include <netinet/in.h> |
| 58 | #include <netinet/in_systm.h> |
| 59 | #include <netinet/ip.h> |
| 60 | #include <netinet/tcp.h> |
| 61 | #include <arpa/inet.h> |
| 62 | #include <netdb.h> |
| 63 | |
| 64 | #include <errno.h> |
| 65 | #include <libutil.h> |
| 66 | #include <pwd.h> |
| 67 | #include <syslog.h> |
| 68 | #include <stdio.h> |
| 69 | #include <stdlib.h> |
| 70 | #include <string.h> |
| 71 | #include <unistd.h> |
| 72 | #include "pathnames.h" |
| 73 | |
| 74 | |
| 75 | #ifndef TIOCPKT_WINDOW |
| 76 | #define TIOCPKT_WINDOW 0x80 |
| 77 | #endif |
| 78 | |
| 79 | #define ARGSTR "Dalnx" |
| 80 | |
| 81 | /* wrapper for KAME-special getnameinfo() */ |
| 82 | #ifndef NI_WITHSCOPEID |
| 83 | #define NI_WITHSCOPEID 0 |
| 84 | #endif |
| 85 | |
| 86 | char *env[2]; |
| 87 | #define NMAX 30 |
| 88 | char lusername[NMAX+1], rusername[NMAX+1]; |
| 89 | static char term[64] = "TERM="; |
| 90 | #define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */ |
| 91 | int keepalive = 1; |
| 92 | int check_all = 0; |
| 93 | int no_delay; |
| 94 | |
| 95 | struct passwd *pwd; |
| 96 | |
| 97 | union sockunion { |
| 98 | struct sockinet { |
| 99 | u_char si_len; |
| 100 | u_char si_family; |
| 101 | u_short si_port; |
| 102 | } su_si; |
| 103 | struct sockaddr_in su_sin; |
| 104 | struct sockaddr_in6 su_sin6; |
| 105 | }; |
| 106 | #define su_len su_si.si_len |
| 107 | #define su_family su_si.si_family |
| 108 | #define su_port su_si.si_port |
| 109 | |
| 110 | void doit (int, union sockunion *); |
| 111 | int control (int, char *, int); |
| 112 | void protocol (int, int); |
| 113 | void cleanup (int); |
| 114 | void fatal (int, char *, int); |
| 115 | int do_rlogin (union sockunion *); |
| 116 | void getstr (char *, int, char *); |
| 117 | void setup_term (int); |
| 118 | int do_krb_login (struct sockaddr_in *); |
| 119 | void usage (void); |
| 120 | |
| 121 | |
| 122 | int |
| 123 | main(argc, argv) |
| 124 | int argc; |
| 125 | char *argv[]; |
| 126 | { |
| 127 | extern int __check_rhosts_file; |
| 128 | union sockunion from; |
| 129 | int ch, fromlen, on; |
| 130 | |
| 131 | openlog("rlogind", LOG_PID | LOG_CONS, LOG_AUTH); |
| 132 | |
| 133 | opterr = 0; |
| 134 | while ((ch = getopt(argc, argv, ARGSTR)) != -1) |
| 135 | switch (ch) { |
| 136 | case 'D': |
| 137 | no_delay = 1; |
| 138 | break; |
| 139 | case 'a': |
| 140 | check_all = 1; |
| 141 | break; |
| 142 | case 'l': |
| 143 | __check_rhosts_file = 0; |
| 144 | break; |
| 145 | case 'n': |
| 146 | keepalive = 0; |
| 147 | break; |
| 148 | #ifdef CRYPT |
| 149 | case 'x': |
| 150 | doencrypt = 1; |
| 151 | break; |
| 152 | #endif |
| 153 | case '?': |
| 154 | default: |
| 155 | usage(); |
| 156 | break; |
| 157 | } |
| 158 | argc -= optind; |
| 159 | argv += optind; |
| 160 | |
| 161 | fromlen = sizeof (from); |
| 162 | if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) { |
| 163 | syslog(LOG_ERR,"Can't get peer name of remote host: %m"); |
| 164 | fatal(STDERR_FILENO, "Can't get peer name of remote host", 1); |
| 165 | } |
| 166 | on = 1; |
| 167 | if (keepalive && |
| 168 | setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof (on)) < 0) |
| 169 | syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m"); |
| 170 | if (no_delay && |
| 171 | setsockopt(0, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0) |
| 172 | syslog(LOG_WARNING, "setsockopt (TCP_NODELAY): %m"); |
| 173 | if (from.su_family == AF_INET) |
| 174 | { |
| 175 | on = IPTOS_LOWDELAY; |
| 176 | if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0) |
| 177 | syslog(LOG_WARNING, "setsockopt (IP_TOS): %m"); |
| 178 | } |
| 179 | |
| 180 | doit(0, &from); |
| 181 | return 0; |
| 182 | } |
| 183 | |
| 184 | int child; |
| 185 | int netf; |
| 186 | char line[MAXPATHLEN]; |
| 187 | int confirmed; |
| 188 | |
| 189 | struct winsize win = { 0, 0, 0, 0 }; |
| 190 | |
| 191 | |
| 192 | void |
| 193 | doit(f, fromp) |
| 194 | int f; |
| 195 | union sockunion *fromp; |
| 196 | { |
| 197 | int master, pid, on = 1; |
| 198 | int authenticated = 0; |
| 199 | char hostname[2 * MAXHOSTNAMELEN + 1]; |
| 200 | char nameinfo[2 * INET6_ADDRSTRLEN + 1]; |
| 201 | char c; |
| 202 | |
| 203 | alarm(60); |
| 204 | read(f, &c, 1); |
| 205 | |
| 206 | if (c != 0) |
| 207 | exit(1); |
| 208 | |
| 209 | alarm(0); |
| 210 | |
| 211 | realhostname_sa(hostname, sizeof(hostname) - 1, |
| 212 | (struct sockaddr *)fromp, fromp->su_len); |
| 213 | /* error check ? */ |
| 214 | fromp->su_port = ntohs((u_short)fromp->su_port); |
| 215 | hostname[sizeof(hostname) - 1] = '\0'; |
| 216 | |
| 217 | { |
| 218 | if ((fromp->su_family != AF_INET |
| 219 | #ifdef INET6 |
| 220 | && fromp->su_family != AF_INET6 |
| 221 | #endif |
| 222 | ) || |
| 223 | fromp->su_port >= IPPORT_RESERVED || |
| 224 | fromp->su_port < IPPORT_RESERVED/2) { |
| 225 | getnameinfo((struct sockaddr *)fromp, |
| 226 | fromp->su_len, |
| 227 | nameinfo, sizeof(nameinfo), NULL, 0, |
| 228 | NI_NUMERICHOST|NI_WITHSCOPEID); |
| 229 | /* error check ? */ |
| 230 | syslog(LOG_NOTICE, "Connection from %s on illegal port", |
| 231 | nameinfo); |
| 232 | fatal(f, "Permission denied", 0); |
| 233 | } |
| 234 | #ifdef IP_OPTIONS |
| 235 | if (fromp->su_family == AF_INET) |
| 236 | { |
| 237 | u_char optbuf[BUFSIZ/3]; |
| 238 | int optsize = sizeof(optbuf), ipproto, i; |
| 239 | struct protoent *ip; |
| 240 | |
| 241 | if ((ip = getprotobyname("ip")) != NULL) |
| 242 | ipproto = ip->p_proto; |
| 243 | else |
| 244 | ipproto = IPPROTO_IP; |
| 245 | if (getsockopt(0, ipproto, IP_OPTIONS, (char *)optbuf, |
| 246 | &optsize) == 0 && optsize != 0) { |
| 247 | for (i = 0; i < optsize; ) { |
| 248 | u_char c = optbuf[i]; |
| 249 | if (c == IPOPT_LSRR || c == IPOPT_SSRR) { |
| 250 | syslog(LOG_NOTICE, |
| 251 | "Connection refused from %s with IP option %s", |
| 252 | inet_ntoa(fromp->su_sin.sin_addr), |
| 253 | c == IPOPT_LSRR ? "LSRR" : "SSRR"); |
| 254 | exit(1); |
| 255 | } |
| 256 | if (c == IPOPT_EOL) |
| 257 | break; |
| 258 | i += (c == IPOPT_NOP) ? 1 : optbuf[i+1]; |
| 259 | } |
| 260 | } |
| 261 | } |
| 262 | #endif |
| 263 | if (do_rlogin(fromp) == 0) |
| 264 | authenticated++; |
| 265 | } |
| 266 | if (confirmed == 0) { |
| 267 | write(f, "", 1); |
| 268 | confirmed = 1; /* we sent the null! */ |
| 269 | } |
| 270 | #ifdef CRYPT |
| 271 | if (doencrypt) |
| 272 | (void) des_enc_write(f, |
| 273 | SECURE_MESSAGE, |
| 274 | strlen(SECURE_MESSAGE), |
| 275 | schedule, &kdata->session); |
| 276 | #endif |
| 277 | netf = f; |
| 278 | |
| 279 | pid = forkpty(&master, line, NULL, &win); |
| 280 | if (pid < 0) { |
| 281 | if (errno == ENOENT) |
| 282 | fatal(f, "Out of ptys", 0); |
| 283 | else |
| 284 | fatal(f, "Forkpty", 1); |
| 285 | } |
| 286 | if (pid == 0) { |
| 287 | if (f > 2) /* f should always be 0, but... */ |
| 288 | (void) close(f); |
| 289 | setup_term(0); |
| 290 | if (*lusername=='-') { |
| 291 | syslog(LOG_ERR, "tried to pass user \"%s\" to login", |
| 292 | lusername); |
| 293 | fatal(STDERR_FILENO, "invalid user", 0); |
| 294 | } |
| 295 | if (authenticated) { |
| 296 | execl(_PATH_LOGIN, "login", "-p", |
| 297 | "-h", hostname, "-f", lusername, (char *)NULL); |
| 298 | } else |
| 299 | execl(_PATH_LOGIN, "login", "-p", |
| 300 | "-h", hostname, lusername, (char *)NULL); |
| 301 | fatal(STDERR_FILENO, _PATH_LOGIN, 1); |
| 302 | /*NOTREACHED*/ |
| 303 | } |
| 304 | #ifdef CRYPT |
| 305 | /* |
| 306 | * If encrypted, don't turn on NBIO or the des read/write |
| 307 | * routines will croak. |
| 308 | */ |
| 309 | |
| 310 | if (!doencrypt) |
| 311 | #endif |
| 312 | ioctl(f, FIONBIO, &on); |
| 313 | ioctl(master, FIONBIO, &on); |
| 314 | ioctl(master, TIOCPKT, &on); |
| 315 | signal(SIGCHLD, cleanup); |
| 316 | protocol(f, master); |
| 317 | signal(SIGCHLD, SIG_IGN); |
| 318 | cleanup(0); |
| 319 | } |
| 320 | |
| 321 | char magic[2] = { 0377, 0377 }; |
| 322 | char oobdata[] = {TIOCPKT_WINDOW}; |
| 323 | |
| 324 | /* |
| 325 | * Handle a "control" request (signaled by magic being present) |
| 326 | * in the data stream. For now, we are only willing to handle |
| 327 | * window size changes. |
| 328 | */ |
| 329 | int |
| 330 | control(pty, cp, n) |
| 331 | int pty; |
| 332 | char *cp; |
| 333 | int n; |
| 334 | { |
| 335 | struct winsize w; |
| 336 | |
| 337 | if (n < 4+sizeof (w) || cp[2] != 's' || cp[3] != 's') |
| 338 | return (0); |
| 339 | oobdata[0] &= ~TIOCPKT_WINDOW; /* we know he heard */ |
| 340 | bcopy(cp+4, (char *)&w, sizeof(w)); |
| 341 | w.ws_row = ntohs(w.ws_row); |
| 342 | w.ws_col = ntohs(w.ws_col); |
| 343 | w.ws_xpixel = ntohs(w.ws_xpixel); |
| 344 | w.ws_ypixel = ntohs(w.ws_ypixel); |
| 345 | (void)ioctl(pty, TIOCSWINSZ, &w); |
| 346 | return (4+sizeof (w)); |
| 347 | } |
| 348 | |
| 349 | /* |
| 350 | * rlogin "protocol" machine. |
| 351 | */ |
| 352 | void |
| 353 | protocol(f, p) |
| 354 | register int f, p; |
| 355 | { |
| 356 | char pibuf[1024+1], fibuf[1024], *pbp = NULL, *fbp = NULL; |
| 357 | int pcc = 0, fcc = 0; |
| 358 | int cc, nfd, n; |
| 359 | char cntl; |
| 360 | |
| 361 | /* |
| 362 | * Must ignore SIGTTOU, otherwise we'll stop |
| 363 | * when we try and set slave pty's window shape |
| 364 | * (our controlling tty is the master pty). |
| 365 | */ |
| 366 | (void) signal(SIGTTOU, SIG_IGN); |
| 367 | send(f, oobdata, 1, MSG_OOB); /* indicate new rlogin */ |
| 368 | if (f > p) |
| 369 | nfd = f + 1; |
| 370 | else |
| 371 | nfd = p + 1; |
| 372 | if (nfd > FD_SETSIZE) { |
| 373 | syslog(LOG_ERR, "select mask too small, increase FD_SETSIZE"); |
| 374 | fatal(f, "internal error (select mask too small)", 0); |
| 375 | } |
| 376 | for (;;) { |
| 377 | fd_set ibits, obits, ebits, *omask; |
| 378 | |
| 379 | FD_ZERO(&ebits); |
| 380 | FD_ZERO(&ibits); |
| 381 | FD_ZERO(&obits); |
| 382 | omask = (fd_set *)NULL; |
| 383 | if (fcc) { |
| 384 | FD_SET(p, &obits); |
| 385 | omask = &obits; |
| 386 | } else |
| 387 | FD_SET(f, &ibits); |
| 388 | if (pcc >= 0) { |
| 389 | if (pcc) { |
| 390 | FD_SET(f, &obits); |
| 391 | omask = &obits; |
| 392 | } else |
| 393 | FD_SET(p, &ibits); |
| 394 | } |
| 395 | FD_SET(p, &ebits); |
| 396 | if ((n = select(nfd, &ibits, omask, &ebits, 0)) < 0) { |
| 397 | if (errno == EINTR) |
| 398 | continue; |
| 399 | fatal(f, "select", 1); |
| 400 | } |
| 401 | if (n == 0) { |
| 402 | /* shouldn't happen... */ |
| 403 | sleep(5); |
| 404 | continue; |
| 405 | } |
| 406 | #define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP)) |
| 407 | if (FD_ISSET(p, &ebits)) { |
| 408 | cc = read(p, &cntl, 1); |
| 409 | if (cc == 1 && pkcontrol(cntl)) { |
| 410 | cntl |= oobdata[0]; |
| 411 | send(f, &cntl, 1, MSG_OOB); |
| 412 | if (cntl & TIOCPKT_FLUSHWRITE) { |
| 413 | pcc = 0; |
| 414 | FD_CLR(p, &ibits); |
| 415 | } |
| 416 | } |
| 417 | } |
| 418 | if (FD_ISSET(f, &ibits)) { |
| 419 | #ifdef CRYPT |
| 420 | if (doencrypt) |
| 421 | fcc = des_enc_read(f, fibuf, sizeof(fibuf), |
| 422 | schedule, &kdata->session); |
| 423 | else |
| 424 | #endif |
| 425 | fcc = read(f, fibuf, sizeof(fibuf)); |
| 426 | if (fcc < 0 && errno == EWOULDBLOCK) |
| 427 | fcc = 0; |
| 428 | else { |
| 429 | register char *cp; |
| 430 | int left, n; |
| 431 | |
| 432 | if (fcc <= 0) |
| 433 | break; |
| 434 | fbp = fibuf; |
| 435 | |
| 436 | top: |
| 437 | for (cp = fibuf; cp < fibuf+fcc-1; cp++) |
| 438 | if (cp[0] == magic[0] && |
| 439 | cp[1] == magic[1]) { |
| 440 | left = fcc - (cp-fibuf); |
| 441 | n = control(p, cp, left); |
| 442 | if (n) { |
| 443 | left -= n; |
| 444 | if (left > 0) |
| 445 | bcopy(cp+n, cp, left); |
| 446 | fcc -= n; |
| 447 | goto top; /* n^2 */ |
| 448 | } |
| 449 | } |
| 450 | FD_SET(p, &obits); /* try write */ |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | if (FD_ISSET(p, &obits) && fcc > 0) { |
| 455 | cc = write(p, fbp, fcc); |
| 456 | if (cc > 0) { |
| 457 | fcc -= cc; |
| 458 | fbp += cc; |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | if (FD_ISSET(p, &ibits)) { |
| 463 | pcc = read(p, pibuf, sizeof (pibuf)); |
| 464 | pbp = pibuf; |
| 465 | if (pcc < 0 && errno == EWOULDBLOCK) |
| 466 | pcc = 0; |
| 467 | else if (pcc <= 0) |
| 468 | break; |
| 469 | else if (pibuf[0] == 0) { |
| 470 | pbp++, pcc--; |
| 471 | #ifdef CRYPT |
| 472 | if (!doencrypt) |
| 473 | #endif |
| 474 | FD_SET(f, &obits); /* try write */ |
| 475 | } else { |
| 476 | if (pkcontrol(pibuf[0])) { |
| 477 | pibuf[0] |= oobdata[0]; |
| 478 | send(f, &pibuf[0], 1, MSG_OOB); |
| 479 | } |
| 480 | pcc = 0; |
| 481 | } |
| 482 | } |
| 483 | if ((FD_ISSET(f, &obits)) && pcc > 0) { |
| 484 | #ifdef CRYPT |
| 485 | if (doencrypt) |
| 486 | cc = des_enc_write(f, pbp, pcc, |
| 487 | schedule, &kdata->session); |
| 488 | else |
| 489 | #endif |
| 490 | cc = write(f, pbp, pcc); |
| 491 | if (cc < 0 && errno == EWOULDBLOCK) { |
| 492 | /* |
| 493 | * This happens when we try write after read |
| 494 | * from p, but some old kernels balk at large |
| 495 | * writes even when select returns true. |
| 496 | */ |
| 497 | if (!FD_ISSET(p, &ibits)) |
| 498 | sleep(5); |
| 499 | continue; |
| 500 | } |
| 501 | if (cc > 0) { |
| 502 | pcc -= cc; |
| 503 | pbp += cc; |
| 504 | } |
| 505 | } |
| 506 | } |
| 507 | } |
| 508 | |
| 509 | void |
| 510 | cleanup(signo) |
| 511 | int signo; |
| 512 | { |
| 513 | char *p; |
| 514 | |
| 515 | p = line + sizeof(_PATH_DEV) - 1; |
| 516 | if (logout(p)) |
| 517 | logwtmp(p, "", ""); |
| 518 | (void)chflags(line, 0); |
| 519 | (void)chmod(line, 0666); |
| 520 | (void)chown(line, 0, 0); |
| 521 | *p = 'p'; |
| 522 | (void)chflags(line, 0); |
| 523 | (void)chmod(line, 0666); |
| 524 | (void)chown(line, 0, 0); |
| 525 | shutdown(netf, 2); |
| 526 | exit(1); |
| 527 | } |
| 528 | |
| 529 | void |
| 530 | fatal(f, msg, syserr) |
| 531 | int f; |
| 532 | char *msg; |
| 533 | int syserr; |
| 534 | { |
| 535 | int len; |
| 536 | char buf[BUFSIZ], *bp = buf; |
| 537 | |
| 538 | /* |
| 539 | * Prepend binary one to message if we haven't sent |
| 540 | * the magic null as confirmation. |
| 541 | */ |
| 542 | if (!confirmed) |
| 543 | *bp++ = '\01'; /* error indicator */ |
| 544 | if (syserr) |
| 545 | len = snprintf(bp, sizeof(buf), "rlogind: %s: %s.\r\n", |
| 546 | msg, strerror(errno)); |
| 547 | else |
| 548 | len = snprintf(bp, sizeof(buf), "rlogind: %s.\r\n", msg); |
| 549 | (void) write(f, buf, bp + len - buf); |
| 550 | exit(1); |
| 551 | } |
| 552 | |
| 553 | int |
| 554 | do_rlogin(dest) |
| 555 | union sockunion *dest; |
| 556 | { |
| 557 | |
| 558 | getstr(rusername, sizeof(rusername), "remuser too long"); |
| 559 | getstr(lusername, sizeof(lusername), "locuser too long"); |
| 560 | getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long"); |
| 561 | |
| 562 | pwd = getpwnam(lusername); |
| 563 | if (pwd == NULL) |
| 564 | return (-1); |
| 565 | /* XXX why don't we syslog() failure? */ |
| 566 | |
| 567 | return (iruserok_sa(dest, dest->su_len, pwd->pw_uid == 0, rusername, |
| 568 | lusername)); |
| 569 | } |
| 570 | |
| 571 | void |
| 572 | getstr(buf, cnt, errmsg) |
| 573 | char *buf; |
| 574 | int cnt; |
| 575 | char *errmsg; |
| 576 | { |
| 577 | char c; |
| 578 | |
| 579 | do { |
| 580 | if (read(0, &c, 1) != 1) |
| 581 | exit(1); |
| 582 | if (--cnt < 0) |
| 583 | fatal(STDOUT_FILENO, errmsg, 0); |
| 584 | *buf++ = c; |
| 585 | } while (c != 0); |
| 586 | } |
| 587 | |
| 588 | extern char **environ; |
| 589 | |
| 590 | void |
| 591 | setup_term(fd) |
| 592 | int fd; |
| 593 | { |
| 594 | register char *cp = index(term+ENVSIZE, '/'); |
| 595 | char *speed; |
| 596 | struct termios tt; |
| 597 | |
| 598 | #ifndef notyet |
| 599 | tcgetattr(fd, &tt); |
| 600 | if (cp) { |
| 601 | *cp++ = '\0'; |
| 602 | speed = cp; |
| 603 | cp = index(speed, '/'); |
| 604 | if (cp) |
| 605 | *cp++ = '\0'; |
| 606 | cfsetspeed(&tt, atoi(speed)); |
| 607 | } |
| 608 | |
| 609 | tt.c_iflag = TTYDEF_IFLAG; |
| 610 | tt.c_oflag = TTYDEF_OFLAG; |
| 611 | tt.c_lflag = TTYDEF_LFLAG; |
| 612 | tcsetattr(fd, TCSAFLUSH, &tt); |
| 613 | #else |
| 614 | if (cp) { |
| 615 | *cp++ = '\0'; |
| 616 | speed = cp; |
| 617 | cp = index(speed, '/'); |
| 618 | if (cp) |
| 619 | *cp++ = '\0'; |
| 620 | tcgetattr(fd, &tt); |
| 621 | cfsetspeed(&tt, atoi(speed)); |
| 622 | tcsetattr(fd, TCSAFLUSH, &tt); |
| 623 | } |
| 624 | #endif |
| 625 | |
| 626 | env[0] = term; |
| 627 | env[1] = 0; |
| 628 | environ = env; |
| 629 | } |
| 630 | |
| 631 | void |
| 632 | usage() |
| 633 | { |
| 634 | syslog(LOG_ERR, "usage: rlogind [-" ARGSTR "]"); |
| 635 | } |