1 /* $NetBSD: ftp.c,v 1.163 2011/12/10 05:53:58 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * Copyright (c) 1985, 1989, 1993, 1994 34 * The Regents of the University of California. All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 */ 60 61 /* 62 * Copyright (C) 1997 and 1998 WIDE Project. 63 * All rights reserved. 64 * 65 * Redistribution and use in source and binary forms, with or without 66 * modification, are permitted provided that the following conditions 67 * are met: 68 * 1. Redistributions of source code must retain the above copyright 69 * notice, this list of conditions and the following disclaimer. 70 * 2. Redistributions in binary form must reproduce the above copyright 71 * notice, this list of conditions and the following disclaimer in the 72 * documentation and/or other materials provided with the distribution. 73 * 3. Neither the name of the project nor the names of its contributors 74 * may be used to endorse or promote products derived from this software 75 * without specific prior written permission. 76 * 77 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 78 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 79 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 80 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 81 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 82 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 83 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 84 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 85 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 86 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 87 * SUCH DAMAGE. 88 */ 89 90 #include <sys/cdefs.h> 91 #ifndef lint 92 #if 0 93 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 94 #else 95 __RCSID("$NetBSD: ftp.c,v 1.163 2011/12/10 05:53:58 lukem Exp $"); 96 #endif 97 #endif /* not lint */ 98 99 #include <sys/types.h> 100 #include <sys/stat.h> 101 #include <sys/socket.h> 102 #include <sys/time.h> 103 104 #include <netinet/in.h> 105 #include <netinet/in_systm.h> 106 #include <netinet/ip.h> 107 #include <arpa/inet.h> 108 #include <arpa/ftp.h> 109 #include <arpa/telnet.h> 110 111 #include <assert.h> 112 #include <ctype.h> 113 #include <err.h> 114 #include <errno.h> 115 #include <fcntl.h> 116 #include <netdb.h> 117 #include <stdio.h> 118 #include <stdlib.h> 119 #include <string.h> 120 #include <time.h> 121 #include <unistd.h> 122 #include <stdarg.h> 123 124 #include "ftp_var.h" 125 126 volatile sig_atomic_t abrtflag; 127 volatile sig_atomic_t timeoutflag; 128 129 sigjmp_buf ptabort; 130 int ptabflg; 131 int ptflag = 0; 132 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 133 134 static int empty(FILE *, FILE *, int); 135 __dead static void abort_squared(int); 136 137 struct sockinet { 138 union sockunion { 139 struct sockaddr_in su_sin; 140 #ifdef INET6 141 struct sockaddr_in6 su_sin6; 142 #endif 143 } si_su; 144 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 145 int si_len; 146 #endif 147 }; 148 149 #if !defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 150 # define su_len si_len 151 #else 152 # define su_len si_su.su_sin.sin_len 153 #endif 154 #define su_family si_su.su_sin.sin_family 155 #define su_port si_su.su_sin.sin_port 156 157 struct sockinet myctladdr, hisctladdr, data_addr; 158 159 char * 160 hookup(const char *host, const char *port) 161 { 162 int s = -1, error; 163 struct addrinfo hints, *res, *res0; 164 static char hostnamebuf[MAXHOSTNAMELEN]; 165 socklen_t len; 166 int on = 1; 167 168 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 169 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 170 memset(&hints, 0, sizeof(hints)); 171 hints.ai_flags = AI_CANONNAME; 172 hints.ai_family = family; 173 hints.ai_socktype = SOCK_STREAM; 174 hints.ai_protocol = 0; 175 error = getaddrinfo(host, port, &hints, &res0); 176 if (error) { 177 warnx("Can't lookup `%s:%s': %s", host, port, 178 (error == EAI_SYSTEM) ? strerror(errno) 179 : gai_strerror(error)); 180 code = -1; 181 return (0); 182 } 183 184 if (res0->ai_canonname) 185 (void)strlcpy(hostnamebuf, res0->ai_canonname, 186 sizeof(hostnamebuf)); 187 else 188 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 189 hostname = hostnamebuf; 190 191 for (res = res0; res; res = res->ai_next) { 192 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 193 194 ai_unmapped(res); 195 if (getnameinfo(res->ai_addr, res->ai_addrlen, 196 hname, sizeof(hname), sname, sizeof(sname), 197 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 198 strlcpy(hname, "?", sizeof(hname)); 199 strlcpy(sname, "?", sizeof(sname)); 200 } 201 if (verbose && res0->ai_next) { 202 /* if we have multiple possibilities */ 203 fprintf(ttyout, "Trying %s:%s ...\n", hname, sname); 204 } 205 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 206 if (s < 0) { 207 warn("Can't create socket for connection to `%s:%s'", 208 hname, sname); 209 continue; 210 } 211 if (ftp_connect(s, res->ai_addr, res->ai_addrlen) < 0) { 212 close(s); 213 s = -1; 214 continue; 215 } 216 217 /* finally we got one */ 218 break; 219 } 220 if (s < 0) { 221 warnx("Can't connect to `%s:%s'", host, port); 222 code = -1; 223 freeaddrinfo(res0); 224 return 0; 225 } 226 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 227 hisctladdr.su_len = res->ai_addrlen; 228 freeaddrinfo(res0); 229 res0 = res = NULL; 230 231 len = hisctladdr.su_len; 232 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 233 warn("Can't determine my address of connection to `%s:%s'", 234 host, port); 235 code = -1; 236 goto bad; 237 } 238 myctladdr.su_len = len; 239 240 #ifdef IPTOS_LOWDELAY 241 if (hisctladdr.su_family == AF_INET) { 242 int tos = IPTOS_LOWDELAY; 243 if (setsockopt(s, IPPROTO_IP, IP_TOS, 244 (void *)&tos, sizeof(tos)) == -1) { 245 DWARN("setsockopt %s (ignored)", 246 "IPTOS_LOWDELAY"); 247 } 248 } 249 #endif 250 cin = fdopen(s, "r"); 251 cout = fdopen(s, "w"); 252 if (cin == NULL || cout == NULL) { 253 warnx("Can't fdopen socket"); 254 if (cin) 255 (void)fclose(cin); 256 if (cout) 257 (void)fclose(cout); 258 code = -1; 259 goto bad; 260 } 261 if (verbose) 262 fprintf(ttyout, "Connected to %s.\n", hostname); 263 if (getreply(0) > 2) { /* read startup message from server */ 264 if (cin) 265 (void)fclose(cin); 266 if (cout) 267 (void)fclose(cout); 268 code = -1; 269 goto bad; 270 } 271 272 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 273 (void *)&on, sizeof(on)) == -1) { 274 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 275 } 276 277 return (hostname); 278 bad: 279 (void)close(s); 280 return (NULL); 281 } 282 283 void 284 cmdabort(int notused) 285 { 286 int oerrno = errno; 287 288 sigint_raised = 1; 289 alarmtimer(0); 290 if (fromatty) 291 write(fileno(ttyout), "\n", 1); 292 abrtflag++; 293 if (ptflag) 294 siglongjmp(ptabort, 1); 295 errno = oerrno; 296 } 297 298 void 299 cmdtimeout(int notused) 300 { 301 int oerrno = errno; 302 303 alarmtimer(0); 304 if (fromatty) 305 write(fileno(ttyout), "\n", 1); 306 timeoutflag++; 307 if (ptflag) 308 siglongjmp(ptabort, 1); 309 errno = oerrno; 310 } 311 312 /*VARARGS*/ 313 int 314 command(const char *fmt, ...) 315 { 316 va_list ap; 317 int r; 318 sigfunc oldsigint; 319 320 #ifndef NO_DEBUG 321 if (ftp_debug) { 322 fputs("---> ", ttyout); 323 va_start(ap, fmt); 324 if (strncmp("PASS ", fmt, 5) == 0) 325 fputs("PASS XXXX", ttyout); 326 else if (strncmp("ACCT ", fmt, 5) == 0) 327 fputs("ACCT XXXX", ttyout); 328 else 329 vfprintf(ttyout, fmt, ap); 330 va_end(ap); 331 putc('\n', ttyout); 332 } 333 #endif 334 if (cout == NULL) { 335 warnx("No control connection for command"); 336 code = -1; 337 return (0); 338 } 339 340 abrtflag = 0; 341 342 oldsigint = xsignal(SIGINT, cmdabort); 343 344 va_start(ap, fmt); 345 vfprintf(cout, fmt, ap); 346 va_end(ap); 347 fputs("\r\n", cout); 348 (void)fflush(cout); 349 cpend = 1; 350 r = getreply(!strcmp(fmt, "QUIT")); 351 if (abrtflag && oldsigint != SIG_IGN) 352 (*oldsigint)(SIGINT); 353 (void)xsignal(SIGINT, oldsigint); 354 return (r); 355 } 356 357 static const char *m421[] = { 358 "remote server timed out. Connection closed", 359 "user interrupt. Connection closed", 360 "remote server has closed connection", 361 }; 362 363 int 364 getreply(int expecteof) 365 { 366 char current_line[BUFSIZ]; /* last line of previous reply */ 367 int c, n, lineno; 368 int dig; 369 int originalcode = 0, continuation = 0; 370 sigfunc oldsigint, oldsigalrm; 371 int pflag = 0; 372 char *cp, *pt = pasv; 373 374 abrtflag = 0; 375 timeoutflag = 0; 376 377 oldsigint = xsignal(SIGINT, cmdabort); 378 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 379 380 for (lineno = 0 ;; lineno++) { 381 dig = n = code = 0; 382 cp = current_line; 383 while (alarmtimer(quit_time ? quit_time : 60), 384 ((c = getc(cin)) != '\n')) { 385 if (c == IAC) { /* handle telnet commands */ 386 switch (c = getc(cin)) { 387 case WILL: 388 case WONT: 389 c = getc(cin); 390 fprintf(cout, "%c%c%c", IAC, DONT, c); 391 (void)fflush(cout); 392 break; 393 case DO: 394 case DONT: 395 c = getc(cin); 396 fprintf(cout, "%c%c%c", IAC, WONT, c); 397 (void)fflush(cout); 398 break; 399 default: 400 break; 401 } 402 continue; 403 } 404 dig++; 405 if (c == EOF) { 406 /* 407 * these will get trashed by pswitch() 408 * in lostpeer() 409 */ 410 int reply_timeoutflag = timeoutflag; 411 int reply_abrtflag = abrtflag; 412 413 alarmtimer(0); 414 if (expecteof && feof(cin)) { 415 (void)xsignal(SIGINT, oldsigint); 416 (void)xsignal(SIGALRM, oldsigalrm); 417 code = 221; 418 return (0); 419 } 420 cpend = 0; 421 lostpeer(0); 422 if (verbose) { 423 size_t midx; 424 if (reply_timeoutflag) 425 midx = 0; 426 else if (reply_abrtflag) 427 midx = 1; 428 else 429 midx = 2; 430 (void)fprintf(ttyout, 431 "421 Service not available, %s.\n", m421[midx]); 432 (void)fflush(ttyout); 433 } 434 code = 421; 435 (void)xsignal(SIGINT, oldsigint); 436 (void)xsignal(SIGALRM, oldsigalrm); 437 return (4); 438 } 439 if (c != '\r' && (verbose > 0 || 440 ((verbose > -1 && n == '5' && dig > 4) && 441 (((!n && c < '5') || (n && n < '5')) 442 || !retry_connect)))) { 443 if (proxflag && 444 (dig == 1 || (dig == 5 && verbose == 0))) 445 fprintf(ttyout, "%s:", hostname); 446 (void)putc(c, ttyout); 447 } 448 if (dig < 4 && isdigit(c)) 449 code = code * 10 + (c - '0'); 450 if (!pflag && (code == 227 || code == 228)) 451 pflag = 1; 452 else if (!pflag && code == 229) 453 pflag = 100; 454 if (dig > 4 && pflag == 1 && isdigit(c)) 455 pflag = 2; 456 if (pflag == 2) { 457 if (c != '\r' && c != ')') { 458 if (pt < &pasv[sizeof(pasv) - 1]) 459 *pt++ = c; 460 } else { 461 *pt = '\0'; 462 pflag = 3; 463 } 464 } 465 if (pflag == 100 && c == '(') 466 pflag = 2; 467 if (dig == 4 && c == '-') { 468 if (continuation) 469 code = 0; 470 continuation++; 471 } 472 if (n == 0) 473 n = c; 474 if (cp < ¤t_line[sizeof(current_line) - 1]) 475 *cp++ = c; 476 } 477 if (verbose > 0 || ((verbose > -1 && n == '5') && 478 (n < '5' || !retry_connect))) { 479 (void)putc(c, ttyout); 480 (void)fflush(ttyout); 481 } 482 if (cp[-1] == '\r') 483 cp[-1] = '\0'; 484 *cp = '\0'; 485 if (lineno == 0) 486 (void)strlcpy(reply_string, current_line, 487 sizeof(reply_string)); 488 if (lineno > 0 && code == 0 && reply_callback != NULL) 489 (*reply_callback)(current_line); 490 if (continuation && code != originalcode) { 491 if (originalcode == 0) 492 originalcode = code; 493 continue; 494 } 495 if (n != '1') 496 cpend = 0; 497 alarmtimer(0); 498 (void)xsignal(SIGINT, oldsigint); 499 (void)xsignal(SIGALRM, oldsigalrm); 500 if (code == 421 || originalcode == 421) 501 lostpeer(0); 502 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 503 (*oldsigint)(SIGINT); 504 if (timeoutflag && oldsigalrm != cmdtimeout && 505 oldsigalrm != SIG_IGN) 506 (*oldsigalrm)(SIGINT); 507 return (n - '0'); 508 } 509 } 510 511 static int 512 empty(FILE *ecin, FILE *din, int sec) 513 { 514 int nr, nfd; 515 struct pollfd pfd[2]; 516 517 nfd = 0; 518 if (ecin) { 519 pfd[nfd].fd = fileno(ecin); 520 pfd[nfd++].events = POLLIN; 521 } 522 523 if (din) { 524 pfd[nfd].fd = fileno(din); 525 pfd[nfd++].events = POLLIN; 526 } 527 528 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 529 return nr; 530 531 nr = 0; 532 nfd = 0; 533 if (ecin) 534 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 535 if (din) 536 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 537 return nr; 538 } 539 540 sigjmp_buf xferabort; 541 542 __dead static void 543 abortxfer(int notused) 544 { 545 char msgbuf[100]; 546 size_t len; 547 548 sigint_raised = 1; 549 alarmtimer(0); 550 mflag = 0; 551 abrtflag = 0; 552 switch (direction[0]) { 553 case 'r': 554 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 555 break; 556 case 's': 557 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 558 break; 559 default: 560 errx(1, "abortxfer: unknown direction `%s'", direction); 561 } 562 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 563 sizeof(msgbuf)); 564 write(fileno(ttyout), msgbuf, len); 565 siglongjmp(xferabort, 1); 566 } 567 568 /* 569 * Read data from infd & write to outfd, using buf/bufsize as the temporary 570 * buffer, dealing with short writes. 571 * If rate_limit != 0, rate-limit the transfer. 572 * If hash_interval != 0, fputc('c', ttyout) every hash_interval bytes. 573 * Updates global variables: bytes. 574 * Returns 0 if ok, 1 if there was a read error, 2 if there was a write error. 575 * In the case of error, errno contains the appropriate error code. 576 */ 577 static int 578 copy_bytes(int infd, int outfd, char *buf, size_t bufsize, 579 int rate_limit, int hash_interval) 580 { 581 volatile off_t hashc; 582 ssize_t inc, outc; 583 char *bufp; 584 struct timeval tvthen, tvnow, tvdiff; 585 off_t bufrem, bufchunk; 586 int serr; 587 588 hashc = hash_interval; 589 if (rate_limit) 590 bufchunk = rate_limit; 591 else 592 bufchunk = bufsize; 593 594 while (1) { 595 if (rate_limit) { 596 (void)gettimeofday(&tvthen, NULL); 597 } 598 errno = 0; 599 inc = outc = 0; 600 /* copy bufchunk at a time */ 601 bufrem = bufchunk; 602 while (bufrem > 0) { 603 inc = read(infd, buf, MIN((off_t)bufsize, bufrem)); 604 if (inc <= 0) 605 goto copy_done; 606 bytes += inc; 607 bufrem -= inc; 608 bufp = buf; 609 while (inc > 0) { 610 outc = write(outfd, bufp, inc); 611 if (outc < 0) 612 goto copy_done; 613 inc -= outc; 614 bufp += outc; 615 } 616 if (hash_interval) { 617 while (bytes >= hashc) { 618 (void)putc('#', ttyout); 619 hashc += hash_interval; 620 } 621 (void)fflush(ttyout); 622 } 623 } 624 if (rate_limit) { /* rate limited; wait if necessary */ 625 while (1) { 626 (void)gettimeofday(&tvnow, NULL); 627 timersub(&tvnow, &tvthen, &tvdiff); 628 if (tvdiff.tv_sec > 0) 629 break; 630 usleep(1000000 - tvdiff.tv_usec); 631 } 632 } 633 } 634 635 copy_done: 636 serr = errno; 637 if (hash_interval && bytes > 0) { 638 if (bytes < hash_interval) 639 (void)putc('#', ttyout); 640 (void)putc('\n', ttyout); 641 (void)fflush(ttyout); 642 } 643 errno = serr; 644 if (inc == -1) 645 return 1; 646 if (outc == -1) 647 return 2; 648 649 return 0; 650 } 651 652 void 653 sendrequest(const char *cmd, const char *local, const char *remote, 654 int printnames) 655 { 656 struct stat st; 657 int c; 658 FILE *volatile fin; 659 FILE *volatile dout; 660 int (*volatile closefunc)(FILE *); 661 sigfunc volatile oldintr; 662 sigfunc volatile oldintp; 663 off_t volatile hashbytes; 664 int hash_interval; 665 const char *lmode; 666 static size_t bufsize; 667 static char *buf; 668 int oprogress; 669 670 hashbytes = mark; 671 direction = "sent"; 672 dout = NULL; 673 bytes = 0; 674 filesize = -1; 675 oprogress = progress; 676 if (verbose && printnames) { 677 if (*local != '-') 678 fprintf(ttyout, "local: %s ", local); 679 if (remote) 680 fprintf(ttyout, "remote: %s\n", remote); 681 } 682 if (proxy) { 683 proxtrans(cmd, local, remote); 684 return; 685 } 686 if (curtype != type) 687 changetype(type, 0); 688 closefunc = NULL; 689 oldintr = NULL; 690 oldintp = NULL; 691 lmode = "w"; 692 if (sigsetjmp(xferabort, 1)) { 693 while (cpend) 694 (void)getreply(0); 695 code = -1; 696 goto cleanupsend; 697 } 698 (void)xsignal(SIGQUIT, psummary); 699 oldintr = xsignal(SIGINT, abortxfer); 700 if (strcmp(local, "-") == 0) { 701 fin = stdin; 702 progress = 0; 703 } else if (*local == '|') { 704 oldintp = xsignal(SIGPIPE, SIG_IGN); 705 fin = popen(local + 1, "r"); 706 if (fin == NULL) { 707 warn("Can't execute `%s'", local + 1); 708 code = -1; 709 goto cleanupsend; 710 } 711 progress = 0; 712 closefunc = pclose; 713 } else { 714 fin = fopen(local, "r"); 715 if (fin == NULL) { 716 warn("Can't open `%s'", local); 717 code = -1; 718 goto cleanupsend; 719 } 720 closefunc = fclose; 721 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 722 fprintf(ttyout, "%s: not a plain file.\n", local); 723 code = -1; 724 goto cleanupsend; 725 } 726 filesize = st.st_size; 727 } 728 if (initconn()) { 729 code = -1; 730 goto cleanupsend; 731 } 732 if (sigsetjmp(xferabort, 1)) 733 goto abort; 734 735 if (restart_point && 736 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 737 int rc; 738 739 rc = -1; 740 switch (curtype) { 741 case TYPE_A: 742 rc = fseeko(fin, restart_point, SEEK_SET); 743 break; 744 case TYPE_I: 745 case TYPE_L: 746 rc = lseek(fileno(fin), restart_point, SEEK_SET); 747 break; 748 } 749 if (rc < 0) { 750 warn("Can't seek to restart `%s'", local); 751 goto cleanupsend; 752 } 753 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 754 goto cleanupsend; 755 lmode = "r+"; 756 } 757 if (remote) { 758 if (command("%s %s", cmd, remote) != PRELIM) 759 goto cleanupsend; 760 } else { 761 if (command("%s", cmd) != PRELIM) 762 goto cleanupsend; 763 } 764 dirchange = 1; 765 dout = dataconn(lmode); 766 if (dout == NULL) 767 goto abort; 768 769 assert(sndbuf_size > 0); 770 if ((size_t)sndbuf_size > bufsize) { 771 if (buf) 772 (void)free(buf); 773 bufsize = sndbuf_size; 774 buf = ftp_malloc(bufsize); 775 } 776 777 progressmeter(-1); 778 oldintp = xsignal(SIGPIPE, SIG_IGN); 779 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 780 781 switch (curtype) { 782 783 case TYPE_I: 784 case TYPE_L: 785 c = copy_bytes(fileno(fin), fileno(dout), buf, bufsize, 786 rate_put, hash_interval); 787 if (c == 1) { 788 warn("Reading `%s'", local); 789 } else if (c == 2) { 790 if (errno != EPIPE) 791 warn("Writing to network"); 792 bytes = -1; 793 } 794 break; 795 796 case TYPE_A: 797 while ((c = getc(fin)) != EOF) { 798 if (c == '\n') { 799 while (hash_interval && bytes >= hashbytes) { 800 (void)putc('#', ttyout); 801 (void)fflush(ttyout); 802 hashbytes += mark; 803 } 804 if (ferror(dout)) 805 break; 806 (void)putc('\r', dout); 807 bytes++; 808 } 809 (void)putc(c, dout); 810 bytes++; 811 #if 0 /* this violates RFC 959 */ 812 if (c == '\r') { 813 (void)putc('\0', dout); 814 bytes++; 815 } 816 #endif 817 } 818 if (hash_interval) { 819 if (bytes < hashbytes) 820 (void)putc('#', ttyout); 821 (void)putc('\n', ttyout); 822 } 823 if (ferror(fin)) 824 warn("Reading `%s'", local); 825 if (ferror(dout)) { 826 if (errno != EPIPE) 827 warn("Writing to network"); 828 bytes = -1; 829 } 830 break; 831 } 832 833 progressmeter(1); 834 if (closefunc != NULL) { 835 (*closefunc)(fin); 836 fin = NULL; 837 } 838 (void)fclose(dout); 839 dout = NULL; 840 (void)getreply(0); 841 if (bytes > 0) 842 ptransfer(0); 843 goto cleanupsend; 844 845 abort: 846 (void)xsignal(SIGINT, oldintr); 847 oldintr = NULL; 848 if (!cpend) { 849 code = -1; 850 goto cleanupsend; 851 } 852 if (data >= 0) { 853 (void)close(data); 854 data = -1; 855 } 856 if (dout) { 857 (void)fclose(dout); 858 dout = NULL; 859 } 860 (void)getreply(0); 861 code = -1; 862 if (bytes > 0) 863 ptransfer(0); 864 865 cleanupsend: 866 if (oldintr) 867 (void)xsignal(SIGINT, oldintr); 868 if (oldintp) 869 (void)xsignal(SIGPIPE, oldintp); 870 if (data >= 0) { 871 (void)close(data); 872 data = -1; 873 } 874 if (closefunc != NULL && fin != NULL) 875 (*closefunc)(fin); 876 if (dout) 877 (void)fclose(dout); 878 progress = oprogress; 879 restart_point = 0; 880 bytes = 0; 881 } 882 883 void 884 recvrequest(const char *cmd, const char *volatile local, const char *remote, 885 const char *lmode, int printnames, int ignorespecial) 886 { 887 FILE *volatile fout; 888 FILE *volatile din; 889 int (*volatile closefunc)(FILE *); 890 sigfunc volatile oldintr; 891 sigfunc volatile oldintp; 892 int c, d; 893 int volatile is_retr; 894 int volatile tcrflag; 895 int volatile bare_lfs; 896 static size_t bufsize; 897 static char *buf; 898 off_t volatile hashbytes; 899 int hash_interval; 900 struct stat st; 901 time_t mtime; 902 struct timeval tval[2]; 903 int oprogress; 904 int opreserve; 905 906 fout = NULL; 907 din = NULL; 908 hashbytes = mark; 909 direction = "received"; 910 bytes = 0; 911 bare_lfs = 0; 912 filesize = -1; 913 oprogress = progress; 914 opreserve = preserve; 915 is_retr = (strcmp(cmd, "RETR") == 0); 916 if (is_retr && verbose && printnames) { 917 if (ignorespecial || *local != '-') 918 fprintf(ttyout, "local: %s ", local); 919 if (remote) 920 fprintf(ttyout, "remote: %s\n", remote); 921 } 922 if (proxy && is_retr) { 923 proxtrans(cmd, local, remote); 924 return; 925 } 926 closefunc = NULL; 927 oldintr = NULL; 928 oldintp = NULL; 929 tcrflag = !crflag && is_retr; 930 if (sigsetjmp(xferabort, 1)) { 931 while (cpend) 932 (void)getreply(0); 933 code = -1; 934 goto cleanuprecv; 935 } 936 (void)xsignal(SIGQUIT, psummary); 937 oldintr = xsignal(SIGINT, abortxfer); 938 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 939 if (access(local, W_OK) < 0) { 940 char *dir = strrchr(local, '/'); 941 942 if (errno != ENOENT && errno != EACCES) { 943 warn("Can't access `%s'", local); 944 code = -1; 945 goto cleanuprecv; 946 } 947 if (dir != NULL) 948 *dir = 0; 949 d = access(dir == local ? "/" : 950 dir ? local : ".", W_OK); 951 if (dir != NULL) 952 *dir = '/'; 953 if (d < 0) { 954 warn("Can't access `%s'", local); 955 code = -1; 956 goto cleanuprecv; 957 } 958 if (!runique && errno == EACCES && 959 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 960 warn("Can't chmod `%s'", local); 961 code = -1; 962 goto cleanuprecv; 963 } 964 if (runique && errno == EACCES && 965 (local = gunique(local)) == NULL) { 966 code = -1; 967 goto cleanuprecv; 968 } 969 } 970 else if (runique && (local = gunique(local)) == NULL) { 971 code = -1; 972 goto cleanuprecv; 973 } 974 } 975 if (!is_retr) { 976 if (curtype != TYPE_A) 977 changetype(TYPE_A, 0); 978 } else { 979 if (curtype != type) 980 changetype(type, 0); 981 filesize = remotesize(remote, 0); 982 if (code == 421 || code == -1) 983 goto cleanuprecv; 984 } 985 if (initconn()) { 986 code = -1; 987 goto cleanuprecv; 988 } 989 if (sigsetjmp(xferabort, 1)) 990 goto abort; 991 if (is_retr && restart_point && 992 command("REST " LLF, (LLT) restart_point) != CONTINUE) 993 goto cleanuprecv; 994 if (! EMPTYSTRING(remote)) { 995 if (command("%s %s", cmd, remote) != PRELIM) 996 goto cleanuprecv; 997 } else { 998 if (command("%s", cmd) != PRELIM) 999 goto cleanuprecv; 1000 } 1001 din = dataconn("r"); 1002 if (din == NULL) 1003 goto abort; 1004 if (!ignorespecial && strcmp(local, "-") == 0) { 1005 fout = stdout; 1006 progress = 0; 1007 preserve = 0; 1008 } else if (!ignorespecial && *local == '|') { 1009 oldintp = xsignal(SIGPIPE, SIG_IGN); 1010 fout = popen(local + 1, "w"); 1011 if (fout == NULL) { 1012 warn("Can't execute `%s'", local+1); 1013 goto abort; 1014 } 1015 progress = 0; 1016 preserve = 0; 1017 closefunc = pclose; 1018 } else { 1019 fout = fopen(local, lmode); 1020 if (fout == NULL) { 1021 warn("Can't open `%s'", local); 1022 goto abort; 1023 } 1024 closefunc = fclose; 1025 } 1026 1027 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1028 progress = 0; 1029 preserve = 0; 1030 } 1031 assert(rcvbuf_size > 0); 1032 if ((size_t)rcvbuf_size > bufsize) { 1033 if (buf) 1034 (void)free(buf); 1035 bufsize = rcvbuf_size; 1036 buf = ftp_malloc(bufsize); 1037 } 1038 1039 progressmeter(-1); 1040 hash_interval = (hash && (!progress || filesize < 0)) ? mark : 0; 1041 1042 switch (curtype) { 1043 1044 case TYPE_I: 1045 case TYPE_L: 1046 if (is_retr && restart_point && 1047 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1048 warn("Can't seek to restart `%s'", local); 1049 goto cleanuprecv; 1050 } 1051 c = copy_bytes(fileno(din), fileno(fout), buf, bufsize, 1052 rate_get, hash_interval); 1053 if (c == 1) { 1054 if (errno != EPIPE) 1055 warn("Reading from network"); 1056 bytes = -1; 1057 } else if (c == 2) { 1058 warn("Writing `%s'", local); 1059 } 1060 break; 1061 1062 case TYPE_A: 1063 if (is_retr && restart_point) { 1064 int ch; 1065 off_t i; 1066 1067 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1068 goto done; 1069 for (i = 0; i++ < restart_point;) { 1070 if ((ch = getc(fout)) == EOF) 1071 goto done; 1072 if (ch == '\n') 1073 i++; 1074 } 1075 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1076 done: 1077 warn("Can't seek to restart `%s'", local); 1078 goto cleanuprecv; 1079 } 1080 } 1081 while ((c = getc(din)) != EOF) { 1082 if (c == '\n') 1083 bare_lfs++; 1084 while (c == '\r') { 1085 while (hash_interval && bytes >= hashbytes) { 1086 (void)putc('#', ttyout); 1087 (void)fflush(ttyout); 1088 hashbytes += mark; 1089 } 1090 bytes++; 1091 if ((c = getc(din)) != '\n' || tcrflag) { 1092 if (ferror(fout)) 1093 goto break2; 1094 (void)putc('\r', fout); 1095 if (c == '\0') { 1096 bytes++; 1097 goto contin2; 1098 } 1099 if (c == EOF) 1100 goto contin2; 1101 } 1102 } 1103 (void)putc(c, fout); 1104 bytes++; 1105 contin2: ; 1106 } 1107 break2: 1108 if (hash_interval) { 1109 if (bytes < hashbytes) 1110 (void)putc('#', ttyout); 1111 (void)putc('\n', ttyout); 1112 } 1113 if (ferror(din)) { 1114 if (errno != EPIPE) 1115 warn("Reading from network"); 1116 bytes = -1; 1117 } 1118 if (ferror(fout)) 1119 warn("Writing `%s'", local); 1120 break; 1121 } 1122 1123 progressmeter(1); 1124 if (closefunc != NULL) { 1125 (*closefunc)(fout); 1126 fout = NULL; 1127 } 1128 (void)fclose(din); 1129 din = NULL; 1130 (void)getreply(0); 1131 if (bare_lfs) { 1132 fprintf(ttyout, 1133 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1134 bare_lfs); 1135 fputs("File may not have transferred correctly.\n", ttyout); 1136 } 1137 if (bytes >= 0 && is_retr) { 1138 if (bytes > 0) 1139 ptransfer(0); 1140 if (preserve && (closefunc == fclose)) { 1141 mtime = remotemodtime(remote, 0); 1142 if (mtime != -1) { 1143 (void)gettimeofday(&tval[0], NULL); 1144 tval[1].tv_sec = mtime; 1145 tval[1].tv_usec = 0; 1146 if (utimes(local, tval) == -1) { 1147 fprintf(ttyout, 1148 "Can't change modification time on %s to %s", 1149 local, 1150 rfc2822time(localtime(&mtime))); 1151 } 1152 } 1153 } 1154 } 1155 goto cleanuprecv; 1156 1157 abort: 1158 /* 1159 * abort using RFC 959 recommended IP,SYNC sequence 1160 */ 1161 if (! sigsetjmp(xferabort, 1)) { 1162 /* this is the first call */ 1163 (void)xsignal(SIGINT, abort_squared); 1164 if (!cpend) { 1165 code = -1; 1166 goto cleanuprecv; 1167 } 1168 abort_remote(din); 1169 } 1170 code = -1; 1171 if (bytes > 0) 1172 ptransfer(0); 1173 1174 cleanuprecv: 1175 if (oldintr) 1176 (void)xsignal(SIGINT, oldintr); 1177 if (oldintp) 1178 (void)xsignal(SIGPIPE, oldintp); 1179 if (data >= 0) { 1180 (void)close(data); 1181 data = -1; 1182 } 1183 if (closefunc != NULL && fout != NULL) 1184 (*closefunc)(fout); 1185 if (din) 1186 (void)fclose(din); 1187 progress = oprogress; 1188 preserve = opreserve; 1189 bytes = 0; 1190 } 1191 1192 /* 1193 * Need to start a listen on the data channel before we send the command, 1194 * otherwise the server's connect may fail. 1195 */ 1196 int 1197 initconn(void) 1198 { 1199 char *p, *a; 1200 int result, tmpno = 0; 1201 int on = 1; 1202 int error; 1203 unsigned int addr[16], port[2]; 1204 unsigned int af, hal, pal; 1205 socklen_t len; 1206 const char *pasvcmd = NULL; 1207 int overbose; 1208 1209 #ifdef INET6 1210 #ifndef NO_DEBUG 1211 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1212 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1213 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1214 warnx("Use of scoped addresses can be troublesome"); 1215 } 1216 #endif 1217 #endif 1218 1219 reinit: 1220 if (passivemode) { 1221 data_addr = myctladdr; 1222 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1223 if (data < 0) { 1224 warn("Can't create socket for data connection"); 1225 return (1); 1226 } 1227 if ((options & SO_DEBUG) && 1228 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1229 (void *)&on, sizeof(on)) == -1) { 1230 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1231 } 1232 result = COMPLETE + 1; 1233 switch (data_addr.su_family) { 1234 case AF_INET: 1235 if (epsv4 && !epsv4bad) { 1236 pasvcmd = "EPSV"; 1237 overbose = verbose; 1238 if (ftp_debug == 0) 1239 verbose = -1; 1240 result = command("EPSV"); 1241 verbose = overbose; 1242 if (verbose > 0 && 1243 (result == COMPLETE || !connected)) 1244 fprintf(ttyout, "%s\n", reply_string); 1245 if (!connected) 1246 return (1); 1247 /* 1248 * this code is to be friendly with broken 1249 * BSDI ftpd 1250 */ 1251 if (code / 10 == 22 && code != 229) { 1252 fputs( 1253 "wrong server: return code must be 229\n", 1254 ttyout); 1255 result = COMPLETE + 1; 1256 } 1257 if (result != COMPLETE) { 1258 epsv4bad = 1; 1259 DPRINTF("disabling epsv4 for this " 1260 "connection\n"); 1261 } 1262 } 1263 if (result != COMPLETE) { 1264 pasvcmd = "PASV"; 1265 result = command("PASV"); 1266 if (!connected) 1267 return (1); 1268 } 1269 break; 1270 #ifdef INET6 1271 case AF_INET6: 1272 if (epsv6 && !epsv6bad) { 1273 pasvcmd = "EPSV"; 1274 overbose = verbose; 1275 if (ftp_debug == 0) 1276 verbose = -1; 1277 result = command("EPSV"); 1278 verbose = overbose; 1279 if (verbose > 0 && 1280 (result == COMPLETE || !connected)) 1281 fprintf(ttyout, "%s\n", reply_string); 1282 if (!connected) 1283 return (1); 1284 /* 1285 * this code is to be friendly with 1286 * broken BSDI ftpd 1287 */ 1288 if (code / 10 == 22 && code != 229) { 1289 fputs( 1290 "wrong server: return code must be 229\n", 1291 ttyout); 1292 result = COMPLETE + 1; 1293 } 1294 if (result != COMPLETE) { 1295 epsv6bad = 1; 1296 DPRINTF("disabling epsv6 for this " 1297 "connection\n"); 1298 } 1299 } 1300 if (result != COMPLETE) { 1301 pasvcmd = "LPSV"; 1302 result = command("LPSV"); 1303 } 1304 if (!connected) 1305 return (1); 1306 break; 1307 #endif 1308 default: 1309 result = COMPLETE + 1; 1310 break; 1311 } 1312 if (result != COMPLETE) { 1313 if (activefallback) { 1314 (void)close(data); 1315 data = -1; 1316 passivemode = 0; 1317 #if 0 1318 activefallback = 0; 1319 #endif 1320 goto reinit; 1321 } 1322 fputs("Passive mode refused.\n", ttyout); 1323 goto bad; 1324 } 1325 1326 #define pack2(var, off) \ 1327 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1328 #define pack4(var, off) \ 1329 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1330 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1331 #define UC(b) (((int)b)&0xff) 1332 1333 /* 1334 * What we've got at this point is a string of comma separated 1335 * one-byte unsigned integer values, separated by commas. 1336 */ 1337 if (strcmp(pasvcmd, "PASV") == 0) { 1338 if (data_addr.su_family != AF_INET) { 1339 fputs( 1340 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1341 error = 1; 1342 goto bad; 1343 } 1344 if (code / 10 == 22 && code != 227) { 1345 fputs("wrong server: return code must be 227\n", 1346 ttyout); 1347 error = 1; 1348 goto bad; 1349 } 1350 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1351 &addr[0], &addr[1], &addr[2], &addr[3], 1352 &port[0], &port[1]); 1353 if (error != 6) { 1354 fputs( 1355 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1356 error = 1; 1357 goto bad; 1358 } 1359 error = 0; 1360 memset(&data_addr, 0, sizeof(data_addr)); 1361 data_addr.su_family = AF_INET; 1362 data_addr.su_len = sizeof(struct sockaddr_in); 1363 data_addr.si_su.su_sin.sin_addr.s_addr = 1364 htonl(pack4(addr, 0)); 1365 data_addr.su_port = htons(pack2(port, 0)); 1366 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1367 if (code / 10 == 22 && code != 228) { 1368 fputs("wrong server: return code must be 228\n", 1369 ttyout); 1370 error = 1; 1371 goto bad; 1372 } 1373 switch (data_addr.su_family) { 1374 case AF_INET: 1375 error = sscanf(pasv, 1376 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1377 &af, &hal, 1378 &addr[0], &addr[1], &addr[2], &addr[3], 1379 &pal, &port[0], &port[1]); 1380 if (error != 9) { 1381 fputs( 1382 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1383 error = 1; 1384 goto bad; 1385 } 1386 if (af != 4 || hal != 4 || pal != 2) { 1387 fputs( 1388 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1389 error = 1; 1390 goto bad; 1391 } 1392 1393 error = 0; 1394 memset(&data_addr, 0, sizeof(data_addr)); 1395 data_addr.su_family = AF_INET; 1396 data_addr.su_len = sizeof(struct sockaddr_in); 1397 data_addr.si_su.su_sin.sin_addr.s_addr = 1398 htonl(pack4(addr, 0)); 1399 data_addr.su_port = htons(pack2(port, 0)); 1400 break; 1401 #ifdef INET6 1402 case AF_INET6: 1403 error = sscanf(pasv, 1404 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1405 &af, &hal, 1406 &addr[0], &addr[1], &addr[2], &addr[3], 1407 &addr[4], &addr[5], &addr[6], &addr[7], 1408 &addr[8], &addr[9], &addr[10], 1409 &addr[11], &addr[12], &addr[13], 1410 &addr[14], &addr[15], 1411 &pal, &port[0], &port[1]); 1412 if (error != 21) { 1413 fputs( 1414 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1415 error = 1; 1416 goto bad; 1417 } 1418 if (af != 6 || hal != 16 || pal != 2) { 1419 fputs( 1420 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1421 error = 1; 1422 goto bad; 1423 } 1424 1425 error = 0; 1426 memset(&data_addr, 0, sizeof(data_addr)); 1427 data_addr.su_family = AF_INET6; 1428 data_addr.su_len = sizeof(struct sockaddr_in6); 1429 { 1430 size_t i; 1431 for (i = 0; i < sizeof(struct in6_addr); i++) { 1432 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1433 UC(addr[i]); 1434 } 1435 } 1436 data_addr.su_port = htons(pack2(port, 0)); 1437 break; 1438 #endif 1439 default: 1440 error = 1; 1441 } 1442 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1443 char delim[4]; 1444 1445 port[0] = 0; 1446 if (code / 10 == 22 && code != 229) { 1447 fputs("wrong server: return code must be 229\n", 1448 ttyout); 1449 error = 1; 1450 goto bad; 1451 } 1452 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1453 &delim[1], &delim[2], &port[1], 1454 &delim[3]) != 5) { 1455 fputs("parse error!\n", ttyout); 1456 error = 1; 1457 goto bad; 1458 } 1459 if (delim[0] != delim[1] || delim[0] != delim[2] 1460 || delim[0] != delim[3]) { 1461 fputs("parse error!\n", ttyout); 1462 error = 1; 1463 goto bad; 1464 } 1465 data_addr = hisctladdr; 1466 data_addr.su_port = htons(port[1]); 1467 } else 1468 goto bad; 1469 1470 if (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1471 data_addr.su_len) < 0) { 1472 if (activefallback) { 1473 (void)close(data); 1474 data = -1; 1475 passivemode = 0; 1476 #if 0 1477 activefallback = 0; 1478 #endif 1479 goto reinit; 1480 } 1481 goto bad; 1482 } 1483 #ifdef IPTOS_THROUGHPUT 1484 if (data_addr.su_family == AF_INET) { 1485 on = IPTOS_THROUGHPUT; 1486 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1487 (void *)&on, sizeof(on)) == -1) { 1488 DWARN("setsockopt %s (ignored)", 1489 "IPTOS_THROUGHPUT"); 1490 } 1491 } 1492 #endif 1493 return (0); 1494 } 1495 1496 noport: 1497 data_addr = myctladdr; 1498 if (sendport) 1499 data_addr.su_port = 0; /* let system pick one */ 1500 if (data != -1) 1501 (void)close(data); 1502 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1503 if (data < 0) { 1504 warn("Can't create socket for data connection"); 1505 if (tmpno) 1506 sendport = 1; 1507 return (1); 1508 } 1509 if (!sendport) 1510 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1511 (void *)&on, sizeof(on)) == -1) { 1512 warn("Can't set SO_REUSEADDR on data connection"); 1513 goto bad; 1514 } 1515 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1516 data_addr.su_len) < 0) { 1517 warn("Can't bind for data connection"); 1518 goto bad; 1519 } 1520 if ((options & SO_DEBUG) && 1521 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1522 (void *)&on, sizeof(on)) == -1) { 1523 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1524 } 1525 len = sizeof(data_addr.si_su); 1526 memset((char *)&data_addr, 0, sizeof (data_addr)); 1527 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1528 warn("Can't determine my address of data connection"); 1529 goto bad; 1530 } 1531 data_addr.su_len = len; 1532 if (ftp_listen(data, 1) < 0) 1533 warn("Can't listen to data connection"); 1534 1535 if (sendport) { 1536 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1537 struct sockinet tmp; 1538 1539 switch (data_addr.su_family) { 1540 case AF_INET: 1541 if (!epsv4 || epsv4bad) { 1542 result = COMPLETE + 1; 1543 break; 1544 } 1545 /* FALLTHROUGH */ 1546 #ifdef INET6 1547 case AF_INET6: 1548 if (!epsv6 || epsv6bad) { 1549 result = COMPLETE + 1; 1550 break; 1551 } 1552 #endif 1553 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1554 tmp = data_addr; 1555 #ifdef INET6 1556 if (tmp.su_family == AF_INET6) 1557 tmp.si_su.su_sin6.sin6_scope_id = 0; 1558 #endif 1559 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1560 tmp.su_len, hname, sizeof(hname), sname, 1561 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1562 result = ERROR; 1563 } else { 1564 overbose = verbose; 1565 if (ftp_debug == 0) 1566 verbose = -1; 1567 result = command("EPRT |%u|%s|%s|", af, hname, 1568 sname); 1569 verbose = overbose; 1570 if (verbose > 0 && 1571 (result == COMPLETE || !connected)) 1572 fprintf(ttyout, "%s\n", reply_string); 1573 if (!connected) 1574 return (1); 1575 if (result != COMPLETE) { 1576 epsv4bad = 1; 1577 DPRINTF("disabling epsv4 for this " 1578 "connection\n"); 1579 } 1580 } 1581 break; 1582 default: 1583 result = COMPLETE + 1; 1584 break; 1585 } 1586 if (result == COMPLETE) 1587 goto skip_port; 1588 1589 switch (data_addr.su_family) { 1590 case AF_INET: 1591 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1592 p = (char *)&data_addr.su_port; 1593 result = command("PORT %d,%d,%d,%d,%d,%d", 1594 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1595 UC(p[0]), UC(p[1])); 1596 break; 1597 #ifdef INET6 1598 case AF_INET6: { 1599 uint8_t ua[sizeof(data_addr.si_su.su_sin6.sin6_addr)]; 1600 uint8_t up[sizeof(data_addr.su_port)]; 1601 1602 memcpy(ua, &data_addr.si_su.su_sin6.sin6_addr, 1603 sizeof(ua)); 1604 memcpy(up, &data_addr.su_port, sizeof(up)); 1605 1606 result = command( 1607 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1608 6, 16, 1609 ua[0], ua[1], ua[2], ua[3], 1610 ua[4], ua[5], ua[6], ua[7], 1611 ua[8], ua[9], ua[10], ua[11], 1612 ua[12], ua[13], ua[14], ua[15], 1613 2, 1614 up[0], up[1]); 1615 break; 1616 } 1617 #endif 1618 default: 1619 result = COMPLETE + 1; /* xxx */ 1620 } 1621 if (!connected) 1622 return (1); 1623 skip_port: 1624 1625 if (result == ERROR && sendport == -1) { 1626 sendport = 0; 1627 tmpno = 1; 1628 goto noport; 1629 } 1630 return (result != COMPLETE); 1631 } 1632 if (tmpno) 1633 sendport = 1; 1634 #ifdef IPTOS_THROUGHPUT 1635 if (data_addr.su_family == AF_INET) { 1636 on = IPTOS_THROUGHPUT; 1637 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1638 (void *)&on, sizeof(on)) == -1) { 1639 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1640 } 1641 } 1642 #endif 1643 return (0); 1644 bad: 1645 (void)close(data); 1646 data = -1; 1647 if (tmpno) 1648 sendport = 1; 1649 return (1); 1650 } 1651 1652 FILE * 1653 dataconn(const char *lmode) 1654 { 1655 struct sockinet from; 1656 int s, flags, rv, timeout; 1657 struct timeval endtime, now, td; 1658 struct pollfd pfd[1]; 1659 socklen_t fromlen; 1660 1661 if (passivemode) /* passive data connection */ 1662 return (fdopen(data, lmode)); 1663 1664 /* active mode data connection */ 1665 1666 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1667 goto dataconn_failed; /* get current socket flags */ 1668 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1669 goto dataconn_failed; /* set non-blocking connect */ 1670 1671 /* NOTE: we now must restore socket flags on successful exit */ 1672 1673 /* limit time waiting on listening socket */ 1674 pfd[0].fd = data; 1675 pfd[0].events = POLLIN; 1676 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1677 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1678 /* without -q, default to 60s */ 1679 do { 1680 (void)gettimeofday(&now, NULL); 1681 timersub(&endtime, &now, &td); 1682 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1683 if (timeout < 0) 1684 timeout = 0; 1685 rv = ftp_poll(pfd, 1, timeout); 1686 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1687 if (rv == -1) { 1688 warn("Can't poll waiting before accept"); 1689 goto dataconn_failed; 1690 } 1691 if (rv == 0) { 1692 warnx("Poll timeout waiting before accept"); 1693 goto dataconn_failed; 1694 } 1695 1696 /* (non-blocking) accept the connection */ 1697 fromlen = myctladdr.su_len; 1698 do { 1699 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1700 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1701 if (s == -1) { 1702 warn("Can't accept data connection"); 1703 goto dataconn_failed; 1704 } 1705 1706 (void)close(data); 1707 data = s; 1708 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1709 goto dataconn_failed; 1710 1711 #ifdef IPTOS_THROUGHPUT 1712 if (from.su_family == AF_INET) { 1713 int tos = IPTOS_THROUGHPUT; 1714 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1715 (void *)&tos, sizeof(tos)) == -1) { 1716 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1717 } 1718 } 1719 #endif 1720 return (fdopen(data, lmode)); 1721 1722 dataconn_failed: 1723 (void)close(data); 1724 data = -1; 1725 return (NULL); 1726 } 1727 1728 void 1729 psabort(int notused) 1730 { 1731 int oerrno = errno; 1732 1733 sigint_raised = 1; 1734 alarmtimer(0); 1735 abrtflag++; 1736 errno = oerrno; 1737 } 1738 1739 void 1740 pswitch(int flag) 1741 { 1742 sigfunc oldintr; 1743 static struct comvars { 1744 int connect; 1745 char name[MAXHOSTNAMELEN]; 1746 struct sockinet mctl; 1747 struct sockinet hctl; 1748 FILE *in; 1749 FILE *out; 1750 int tpe; 1751 int curtpe; 1752 int cpnd; 1753 int sunqe; 1754 int runqe; 1755 int mcse; 1756 int ntflg; 1757 char nti[17]; 1758 char nto[17]; 1759 int mapflg; 1760 char mi[MAXPATHLEN]; 1761 char mo[MAXPATHLEN]; 1762 } proxstruct, tmpstruct; 1763 struct comvars *ip, *op; 1764 1765 abrtflag = 0; 1766 oldintr = xsignal(SIGINT, psabort); 1767 if (flag) { 1768 if (proxy) 1769 return; 1770 ip = &tmpstruct; 1771 op = &proxstruct; 1772 proxy++; 1773 } else { 1774 if (!proxy) 1775 return; 1776 ip = &proxstruct; 1777 op = &tmpstruct; 1778 proxy = 0; 1779 } 1780 ip->connect = connected; 1781 connected = op->connect; 1782 if (hostname) 1783 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1784 else 1785 ip->name[0] = '\0'; 1786 hostname = op->name; 1787 ip->hctl = hisctladdr; 1788 hisctladdr = op->hctl; 1789 ip->mctl = myctladdr; 1790 myctladdr = op->mctl; 1791 ip->in = cin; 1792 cin = op->in; 1793 ip->out = cout; 1794 cout = op->out; 1795 ip->tpe = type; 1796 type = op->tpe; 1797 ip->curtpe = curtype; 1798 curtype = op->curtpe; 1799 ip->cpnd = cpend; 1800 cpend = op->cpnd; 1801 ip->sunqe = sunique; 1802 sunique = op->sunqe; 1803 ip->runqe = runique; 1804 runique = op->runqe; 1805 ip->mcse = mcase; 1806 mcase = op->mcse; 1807 ip->ntflg = ntflag; 1808 ntflag = op->ntflg; 1809 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1810 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1811 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1812 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1813 ip->mapflg = mapflag; 1814 mapflag = op->mapflg; 1815 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1816 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1817 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1818 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1819 (void)xsignal(SIGINT, oldintr); 1820 if (abrtflag) { 1821 abrtflag = 0; 1822 (*oldintr)(SIGINT); 1823 } 1824 } 1825 1826 __dead static void 1827 abortpt(int notused) 1828 { 1829 1830 sigint_raised = 1; 1831 alarmtimer(0); 1832 if (fromatty) 1833 write(fileno(ttyout), "\n", 1); 1834 ptabflg++; 1835 mflag = 0; 1836 abrtflag = 0; 1837 siglongjmp(ptabort, 1); 1838 } 1839 1840 void 1841 proxtrans(const char *cmd, const char *local, const char *remote) 1842 { 1843 sigfunc volatile oldintr; 1844 int prox_type, nfnd; 1845 int volatile secndflag; 1846 const char *volatile cmd2; 1847 1848 oldintr = NULL; 1849 secndflag = 0; 1850 if (strcmp(cmd, "RETR")) 1851 cmd2 = "RETR"; 1852 else 1853 cmd2 = runique ? "STOU" : "STOR"; 1854 if ((prox_type = type) == 0) { 1855 if (unix_server && unix_proxy) 1856 prox_type = TYPE_I; 1857 else 1858 prox_type = TYPE_A; 1859 } 1860 if (curtype != prox_type) 1861 changetype(prox_type, 1); 1862 if (command("PASV") != COMPLETE) { 1863 fputs("proxy server does not support third party transfers.\n", 1864 ttyout); 1865 return; 1866 } 1867 pswitch(0); 1868 if (!connected) { 1869 fputs("No primary connection.\n", ttyout); 1870 pswitch(1); 1871 code = -1; 1872 return; 1873 } 1874 if (curtype != prox_type) 1875 changetype(prox_type, 1); 1876 if (command("PORT %s", pasv) != COMPLETE) { 1877 pswitch(1); 1878 return; 1879 } 1880 if (sigsetjmp(ptabort, 1)) 1881 goto abort; 1882 oldintr = xsignal(SIGINT, abortpt); 1883 if ((restart_point && 1884 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1885 || (command("%s %s", cmd, remote) != PRELIM)) { 1886 (void)xsignal(SIGINT, oldintr); 1887 pswitch(1); 1888 return; 1889 } 1890 sleep(2); 1891 pswitch(1); 1892 secndflag++; 1893 if ((restart_point && 1894 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1895 || (command("%s %s", cmd2, local) != PRELIM)) 1896 goto abort; 1897 ptflag++; 1898 (void)getreply(0); 1899 pswitch(0); 1900 (void)getreply(0); 1901 (void)xsignal(SIGINT, oldintr); 1902 pswitch(1); 1903 ptflag = 0; 1904 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1905 return; 1906 abort: 1907 if (sigsetjmp(xferabort, 1)) { 1908 (void)xsignal(SIGINT, oldintr); 1909 return; 1910 } 1911 (void)xsignal(SIGINT, abort_squared); 1912 ptflag = 0; 1913 if (strcmp(cmd, "RETR") && !proxy) 1914 pswitch(1); 1915 else if (!strcmp(cmd, "RETR") && proxy) 1916 pswitch(0); 1917 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1918 if (command("%s %s", cmd2, local) != PRELIM) { 1919 pswitch(0); 1920 if (cpend) 1921 abort_remote(NULL); 1922 } 1923 pswitch(1); 1924 if (ptabflg) 1925 code = -1; 1926 (void)xsignal(SIGINT, oldintr); 1927 return; 1928 } 1929 if (cpend) 1930 abort_remote(NULL); 1931 pswitch(!proxy); 1932 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1933 if (command("%s %s", cmd2, local) != PRELIM) { 1934 pswitch(0); 1935 if (cpend) 1936 abort_remote(NULL); 1937 pswitch(1); 1938 if (ptabflg) 1939 code = -1; 1940 (void)xsignal(SIGINT, oldintr); 1941 return; 1942 } 1943 } 1944 if (cpend) 1945 abort_remote(NULL); 1946 pswitch(!proxy); 1947 if (cpend) { 1948 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1949 if (nfnd < 0) 1950 warn("Error aborting proxy command"); 1951 if (ptabflg) 1952 code = -1; 1953 lostpeer(0); 1954 } 1955 (void)getreply(0); 1956 (void)getreply(0); 1957 } 1958 if (proxy) 1959 pswitch(0); 1960 pswitch(1); 1961 if (ptabflg) 1962 code = -1; 1963 (void)xsignal(SIGINT, oldintr); 1964 } 1965 1966 void 1967 reset(int argc, char *argv[]) 1968 { 1969 int nfnd = 1; 1970 1971 if (argc == 0 && argv != NULL) { 1972 UPRINTF("usage: %s\n", argv[0]); 1973 code = -1; 1974 return; 1975 } 1976 while (nfnd > 0) { 1977 if ((nfnd = empty(cin, NULL, 0)) < 0) { 1978 warn("Error resetting connection"); 1979 code = -1; 1980 lostpeer(0); 1981 } else if (nfnd) 1982 (void)getreply(0); 1983 } 1984 } 1985 1986 char * 1987 gunique(const char *local) 1988 { 1989 static char new[MAXPATHLEN]; 1990 char *cp = strrchr(local, '/'); 1991 int d, count=0, len; 1992 char ext = '1'; 1993 1994 if (cp) 1995 *cp = '\0'; 1996 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 1997 if (cp) 1998 *cp = '/'; 1999 if (d < 0) { 2000 warn("Can't access `%s'", local); 2001 return (NULL); 2002 } 2003 len = strlcpy(new, local, sizeof(new)); 2004 cp = &new[len]; 2005 *cp++ = '.'; 2006 while (!d) { 2007 if (++count == 100) { 2008 fputs("runique: can't find unique file name.\n", 2009 ttyout); 2010 return (NULL); 2011 } 2012 *cp++ = ext; 2013 *cp = '\0'; 2014 if (ext == '9') 2015 ext = '0'; 2016 else 2017 ext++; 2018 if ((d = access(new, F_OK)) < 0) 2019 break; 2020 if (ext != '0') 2021 cp--; 2022 else if (*(cp - 2) == '.') 2023 *(cp - 1) = '1'; 2024 else { 2025 *(cp - 2) = *(cp - 2) + 1; 2026 cp--; 2027 } 2028 } 2029 return (new); 2030 } 2031 2032 /* 2033 * abort_squared -- 2034 * aborts abort_remote(). lostpeer() is called because if the user is 2035 * too impatient to wait or there's another problem then ftp really 2036 * needs to get back to a known state. 2037 */ 2038 static void 2039 abort_squared(int dummy) 2040 { 2041 char msgbuf[100]; 2042 size_t len; 2043 2044 sigint_raised = 1; 2045 alarmtimer(0); 2046 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2047 sizeof(msgbuf)); 2048 write(fileno(ttyout), msgbuf, len); 2049 lostpeer(0); 2050 siglongjmp(xferabort, 1); 2051 } 2052 2053 void 2054 abort_remote(FILE *din) 2055 { 2056 char buf[BUFSIZ]; 2057 int nfnd; 2058 2059 if (cout == NULL) { 2060 warnx("Lost control connection for abort"); 2061 if (ptabflg) 2062 code = -1; 2063 lostpeer(0); 2064 return; 2065 } 2066 /* 2067 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2068 * after urgent byte rather than before as is protocol now 2069 */ 2070 buf[0] = IAC; 2071 buf[1] = IP; 2072 buf[2] = IAC; 2073 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2074 warn("Can't send abort message"); 2075 fprintf(cout, "%cABOR\r\n", DM); 2076 (void)fflush(cout); 2077 if ((nfnd = empty(cin, din, 10)) <= 0) { 2078 if (nfnd < 0) 2079 warn("Can't send abort message"); 2080 if (ptabflg) 2081 code = -1; 2082 lostpeer(0); 2083 } 2084 if (din && (nfnd & 2)) { 2085 while (read(fileno(din), buf, BUFSIZ) > 0) 2086 continue; 2087 } 2088 if (getreply(0) == ERROR && code == 552) { 2089 /* 552 needed for nic style abort */ 2090 (void)getreply(0); 2091 } 2092 (void)getreply(0); 2093 } 2094 2095 /* 2096 * Ensure that ai->ai_addr is NOT an IPv4 mapped address. 2097 * IPv4 mapped address complicates too many things in FTP 2098 * protocol handling, as FTP protocol is defined differently 2099 * between IPv4 and IPv6. 2100 * 2101 * This may not be the best way to handle this situation, 2102 * since the semantics of IPv4 mapped address is defined in 2103 * the kernel. There are configurations where we should use 2104 * IPv4 mapped address as native IPv6 address, not as 2105 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 2106 * 2107 * More complete solution would be to have an additional 2108 * getsockopt to grab "real" peername/sockname. "real" 2109 * peername/sockname will be AF_INET if IPv4 mapped address 2110 * is used to embed IPv4 address, and will be AF_INET6 if 2111 * we use it as native. What a mess! 2112 */ 2113 void 2114 ai_unmapped(struct addrinfo *ai) 2115 { 2116 #ifdef INET6 2117 struct sockaddr_in6 *sin6; 2118 struct sockaddr_in sin; 2119 socklen_t len; 2120 2121 if (ai->ai_family != AF_INET6) 2122 return; 2123 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2124 sizeof(sin) > ai->ai_addrlen) 2125 return; 2126 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2127 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2128 return; 2129 2130 memset(&sin, 0, sizeof(sin)); 2131 sin.sin_family = AF_INET; 2132 len = sizeof(struct sockaddr_in); 2133 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2134 sizeof(sin.sin_addr)); 2135 sin.sin_port = sin6->sin6_port; 2136 2137 ai->ai_family = AF_INET; 2138 #if defined(HAVE_STRUCT_SOCKADDR_IN_SIN_LEN) 2139 sin.sin_len = len; 2140 #endif 2141 memcpy(ai->ai_addr, &sin, len); 2142 ai->ai_addrlen = len; 2143 #endif 2144 } 2145 2146 #ifdef NO_USAGE 2147 void 2148 xusage(void) 2149 { 2150 fputs("Usage error\n", ttyout); 2151 } 2152 #endif 2153