1 /* $NetBSD: ftp.c,v 1.141 2006/10/07 10:49:14 elad Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2005 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Copyright (c) 1985, 1989, 1993, 1994 41 * The Regents of the University of California. All rights reserved. 42 * 43 * Redistribution and use in source and binary forms, with or without 44 * modification, are permitted provided that the following conditions 45 * are met: 46 * 1. Redistributions of source code must retain the above copyright 47 * notice, this list of conditions and the following disclaimer. 48 * 2. Redistributions in binary form must reproduce the above copyright 49 * notice, this list of conditions and the following disclaimer in the 50 * documentation and/or other materials provided with the distribution. 51 * 3. Neither the name of the University nor the names of its contributors 52 * may be used to endorse or promote products derived from this software 53 * without specific prior written permission. 54 * 55 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 56 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 57 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 58 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 59 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 60 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 61 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 62 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 63 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 64 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 65 * SUCH DAMAGE. 66 */ 67 68 /* 69 * Copyright (C) 1997 and 1998 WIDE Project. 70 * All rights reserved. 71 * 72 * Redistribution and use in source and binary forms, with or without 73 * modification, are permitted provided that the following conditions 74 * are met: 75 * 1. Redistributions of source code must retain the above copyright 76 * notice, this list of conditions and the following disclaimer. 77 * 2. Redistributions in binary form must reproduce the above copyright 78 * notice, this list of conditions and the following disclaimer in the 79 * documentation and/or other materials provided with the distribution. 80 * 3. Neither the name of the project nor the names of its contributors 81 * may be used to endorse or promote products derived from this software 82 * without specific prior written permission. 83 * 84 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 85 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 86 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 87 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 88 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 89 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 90 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 91 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 92 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 93 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 94 * SUCH DAMAGE. 95 */ 96 97 #include <sys/cdefs.h> 98 #ifndef lint 99 #if 0 100 static char sccsid[] = "@(#)ftp.c 8.6 (Berkeley) 10/27/94"; 101 #else 102 __RCSID("$NetBSD: ftp.c,v 1.141 2006/10/07 10:49:14 elad Exp $"); 103 #endif 104 #endif /* not lint */ 105 106 #include <sys/types.h> 107 #include <sys/stat.h> 108 #include <sys/socket.h> 109 #include <sys/time.h> 110 111 #include <netinet/in.h> 112 #include <netinet/in_systm.h> 113 #include <netinet/ip.h> 114 #include <arpa/inet.h> 115 #include <arpa/ftp.h> 116 #include <arpa/telnet.h> 117 118 #include <ctype.h> 119 #include <err.h> 120 #include <errno.h> 121 #include <fcntl.h> 122 #include <netdb.h> 123 #include <stdio.h> 124 #include <stdlib.h> 125 #include <string.h> 126 #include <time.h> 127 #include <unistd.h> 128 #include <stdarg.h> 129 130 #include "ftp_var.h" 131 132 volatile sig_atomic_t abrtflag; 133 volatile sig_atomic_t timeoutflag; 134 135 sigjmp_buf ptabort; 136 int ptabflg; 137 int ptflag = 0; 138 char pasv[BUFSIZ]; /* passive port for proxy data connection */ 139 140 static int empty(FILE *, FILE *, int); 141 142 struct sockinet { 143 union sockunion { 144 struct sockaddr_in su_sin; 145 #ifdef INET6 146 struct sockaddr_in6 su_sin6; 147 #endif 148 } si_su; 149 #if !HAVE_SOCKADDR_SA_LEN 150 int si_len; 151 #endif 152 }; 153 154 #if !HAVE_SOCKADDR_SA_LEN 155 # define su_len si_len 156 #else 157 # define su_len si_su.su_sin.sin_len 158 #endif 159 #define su_family si_su.su_sin.sin_family 160 #define su_port si_su.su_sin.sin_port 161 162 struct sockinet myctladdr, hisctladdr, data_addr; 163 164 char * 165 hookup(char *host, char *port) 166 { 167 int s = -1, error, portnum; 168 struct addrinfo hints, *res, *res0; 169 char hbuf[MAXHOSTNAMELEN]; 170 static char hostnamebuf[MAXHOSTNAMELEN]; 171 char *cause = "unknown"; 172 socklen_t len; 173 int on = 1; 174 175 memset((char *)&hisctladdr, 0, sizeof (hisctladdr)); 176 memset((char *)&myctladdr, 0, sizeof (myctladdr)); 177 memset(&hints, 0, sizeof(hints)); 178 portnum = parseport(port, FTP_PORT); 179 hints.ai_flags = AI_CANONNAME; 180 hints.ai_family = family; 181 hints.ai_socktype = SOCK_STREAM; 182 hints.ai_protocol = 0; 183 error = getaddrinfo(host, NULL, &hints, &res0); 184 if (error) { 185 warnx("%s: %s", host, gai_strerror(error)); 186 code = -1; 187 return (0); 188 } 189 190 if (res0->ai_canonname) 191 (void)strlcpy(hostnamebuf, res0->ai_canonname, 192 sizeof(hostnamebuf)); 193 else 194 (void)strlcpy(hostnamebuf, host, sizeof(hostnamebuf)); 195 hostname = hostnamebuf; 196 197 for (res = res0; res; res = res->ai_next) { 198 /* 199 * make sure that ai_addr is NOT an IPv4 mapped address. 200 * IPv4 mapped address complicates too many things in FTP 201 * protocol handling, as FTP protocol is defined differently 202 * between IPv4 and IPv6. 203 * 204 * This may not be the best way to handle this situation, 205 * since the semantics of IPv4 mapped address is defined in 206 * the kernel. There are configurations where we should use 207 * IPv4 mapped address as native IPv6 address, not as 208 * "an IPv6 address that embeds IPv4 address" (namely, SIIT). 209 * 210 * More complete solution would be to have an additional 211 * getsockopt to grab "real" peername/sockname. "real" 212 * peername/sockname will be AF_INET if IPv4 mapped address 213 * is used to embed IPv4 address, and will be AF_INET6 if 214 * we use it as native. What a mess! 215 */ 216 ai_unmapped(res); 217 if (verbose && res0->ai_next) { 218 /* if we have multiple possibilities */ 219 if (getnameinfo(res->ai_addr, res->ai_addrlen, 220 hbuf, sizeof(hbuf), NULL, 0, NI_NUMERICHOST)) 221 strlcpy(hbuf, "?", sizeof(hbuf)); 222 fprintf(ttyout, "Trying %s...\n", hbuf); 223 } 224 ((struct sockaddr_in *)res->ai_addr)->sin_port = htons(portnum); 225 s = socket(res->ai_family, SOCK_STREAM, res->ai_protocol); 226 if (s < 0) { 227 cause = "socket"; 228 continue; 229 } 230 error = ftp_connect(s, res->ai_addr, res->ai_addrlen); 231 if (error) { 232 /* this "if" clause is to prevent print warning twice */ 233 if (res->ai_next) { 234 if (getnameinfo(res->ai_addr, res->ai_addrlen, 235 hbuf, sizeof(hbuf), NULL, 0, 236 NI_NUMERICHOST)) 237 strlcpy(hbuf, "?", sizeof(hbuf)); 238 warn("connect to address %s", hbuf); 239 } 240 cause = "connect"; 241 close(s); 242 s = -1; 243 continue; 244 } 245 246 /* finally we got one */ 247 break; 248 } 249 if (s < 0) { 250 warn("%s", cause); 251 code = -1; 252 freeaddrinfo(res0); 253 return 0; 254 } 255 memcpy(&hisctladdr.si_su, res->ai_addr, res->ai_addrlen); 256 hisctladdr.su_len = res->ai_addrlen; 257 freeaddrinfo(res0); 258 res0 = res = NULL; 259 260 len = hisctladdr.su_len; 261 if (getsockname(s, (struct sockaddr *)&myctladdr.si_su, &len) == -1) { 262 warn("getsockname"); 263 code = -1; 264 goto bad; 265 } 266 myctladdr.su_len = len; 267 268 #ifdef IPTOS_LOWDELAY 269 if (hisctladdr.su_family == AF_INET) { 270 int tos = IPTOS_LOWDELAY; 271 if (setsockopt(s, IPPROTO_IP, IP_TOS, 272 (void *)&tos, sizeof(tos)) == -1) { 273 DWARN("setsockopt %s (ignored)", 274 "IPTOS_LOWDELAY"); 275 } 276 } 277 #endif 278 cin = fdopen(s, "r"); 279 cout = fdopen(s, "w"); 280 if (cin == NULL || cout == NULL) { 281 warnx("fdopen failed."); 282 if (cin) 283 (void)fclose(cin); 284 if (cout) 285 (void)fclose(cout); 286 code = -1; 287 goto bad; 288 } 289 if (verbose) 290 fprintf(ttyout, "Connected to %s.\n", hostname); 291 if (getreply(0) > 2) { /* read startup message from server */ 292 if (cin) 293 (void)fclose(cin); 294 if (cout) 295 (void)fclose(cout); 296 code = -1; 297 goto bad; 298 } 299 300 if (setsockopt(s, SOL_SOCKET, SO_OOBINLINE, 301 (void *)&on, sizeof(on)) == -1) { 302 DWARN("setsockopt %s (ignored)", "SO_OOBINLINE"); 303 } 304 305 return (hostname); 306 bad: 307 (void)close(s); 308 return (NULL); 309 } 310 311 void 312 cmdabort(int notused) 313 { 314 int oerrno = errno; 315 316 sigint_raised = 1; 317 alarmtimer(0); 318 if (fromatty) 319 write(fileno(ttyout), "\n", 1); 320 abrtflag++; 321 if (ptflag) 322 siglongjmp(ptabort, 1); 323 errno = oerrno; 324 } 325 326 void 327 cmdtimeout(int notused) 328 { 329 int oerrno = errno; 330 331 alarmtimer(0); 332 if (fromatty) 333 write(fileno(ttyout), "\n", 1); 334 timeoutflag++; 335 if (ptflag) 336 siglongjmp(ptabort, 1); 337 errno = oerrno; 338 } 339 340 /*VARARGS*/ 341 int 342 command(const char *fmt, ...) 343 { 344 va_list ap; 345 int r; 346 sigfunc oldsigint; 347 348 #ifndef NO_DEBUG 349 if (ftp_debug) { 350 fputs("---> ", ttyout); 351 va_start(ap, fmt); 352 if (strncmp("PASS ", fmt, 5) == 0) 353 fputs("PASS XXXX", ttyout); 354 else if (strncmp("ACCT ", fmt, 5) == 0) 355 fputs("ACCT XXXX", ttyout); 356 else 357 vfprintf(ttyout, fmt, ap); 358 va_end(ap); 359 putc('\n', ttyout); 360 } 361 #endif 362 if (cout == NULL) { 363 warnx("No control connection for command."); 364 code = -1; 365 return (0); 366 } 367 368 abrtflag = 0; 369 370 oldsigint = xsignal(SIGINT, cmdabort); 371 372 va_start(ap, fmt); 373 vfprintf(cout, fmt, ap); 374 va_end(ap); 375 fputs("\r\n", cout); 376 (void)fflush(cout); 377 cpend = 1; 378 r = getreply(!strcmp(fmt, "QUIT")); 379 if (abrtflag && oldsigint != SIG_IGN) 380 (*oldsigint)(SIGINT); 381 (void)xsignal(SIGINT, oldsigint); 382 return (r); 383 } 384 385 int 386 getreply(int expecteof) 387 { 388 char current_line[BUFSIZ]; /* last line of previous reply */ 389 int c, n, line; 390 int dig; 391 int originalcode = 0, continuation = 0; 392 sigfunc oldsigint, oldsigalrm; 393 int pflag = 0; 394 char *cp, *pt = pasv; 395 396 abrtflag = 0; 397 timeoutflag = 0; 398 399 oldsigint = xsignal(SIGINT, cmdabort); 400 oldsigalrm = xsignal(SIGALRM, cmdtimeout); 401 402 for (line = 0 ;; line++) { 403 dig = n = code = 0; 404 cp = current_line; 405 while (alarmtimer(quit_time ? quit_time : 60), 406 ((c = getc(cin)) != '\n')) { 407 if (c == IAC) { /* handle telnet commands */ 408 switch (c = getc(cin)) { 409 case WILL: 410 case WONT: 411 c = getc(cin); 412 fprintf(cout, "%c%c%c", IAC, DONT, c); 413 (void)fflush(cout); 414 break; 415 case DO: 416 case DONT: 417 c = getc(cin); 418 fprintf(cout, "%c%c%c", IAC, WONT, c); 419 (void)fflush(cout); 420 break; 421 default: 422 break; 423 } 424 continue; 425 } 426 dig++; 427 if (c == EOF) { 428 /* 429 * these will get trashed by pswitch() 430 * in lostpeer() 431 */ 432 int reply_timeoutflag = timeoutflag; 433 int reply_abrtflag = abrtflag; 434 435 alarmtimer(0); 436 if (expecteof && feof(cin)) { 437 (void)xsignal(SIGINT, oldsigint); 438 (void)xsignal(SIGALRM, oldsigalrm); 439 code = 221; 440 return (0); 441 } 442 cpend = 0; 443 lostpeer(0); 444 if (verbose) { 445 if (reply_timeoutflag) 446 fputs( 447 "421 Service not available, remote server timed out. Connection closed\n", 448 ttyout); 449 else if (reply_abrtflag) 450 fputs( 451 "421 Service not available, user interrupt. Connection closed.\n", 452 ttyout); 453 else 454 fputs( 455 "421 Service not available, remote server has closed connection.\n", 456 ttyout); 457 (void)fflush(ttyout); 458 } 459 code = 421; 460 (void)xsignal(SIGINT, oldsigint); 461 (void)xsignal(SIGALRM, oldsigalrm); 462 return (4); 463 } 464 if (c != '\r' && (verbose > 0 || 465 ((verbose > -1 && n == '5' && dig > 4) && 466 (((!n && c < '5') || (n && n < '5')) 467 || !retry_connect)))) { 468 if (proxflag && 469 (dig == 1 || (dig == 5 && verbose == 0))) 470 fprintf(ttyout, "%s:", hostname); 471 (void)putc(c, ttyout); 472 } 473 if (dig < 4 && isdigit(c)) 474 code = code * 10 + (c - '0'); 475 if (!pflag && (code == 227 || code == 228)) 476 pflag = 1; 477 else if (!pflag && code == 229) 478 pflag = 100; 479 if (dig > 4 && pflag == 1 && isdigit(c)) 480 pflag = 2; 481 if (pflag == 2) { 482 if (c != '\r' && c != ')') { 483 if (pt < &pasv[sizeof(pasv) - 1]) 484 *pt++ = c; 485 } else { 486 *pt = '\0'; 487 pflag = 3; 488 } 489 } 490 if (pflag == 100 && c == '(') 491 pflag = 2; 492 if (dig == 4 && c == '-') { 493 if (continuation) 494 code = 0; 495 continuation++; 496 } 497 if (n == 0) 498 n = c; 499 if (cp < ¤t_line[sizeof(current_line) - 1]) 500 *cp++ = c; 501 } 502 if (verbose > 0 || ((verbose > -1 && n == '5') && 503 (n < '5' || !retry_connect))) { 504 (void)putc(c, ttyout); 505 (void)fflush (ttyout); 506 } 507 if (cp[-1] == '\r') 508 cp[-1] = '\0'; 509 *cp = '\0'; 510 if (line == 0) 511 (void)strlcpy(reply_string, current_line, 512 sizeof(reply_string)); 513 if (line > 0 && code == 0 && reply_callback != NULL) 514 (*reply_callback)(current_line); 515 if (continuation && code != originalcode) { 516 if (originalcode == 0) 517 originalcode = code; 518 continue; 519 } 520 if (n != '1') 521 cpend = 0; 522 alarmtimer(0); 523 (void)xsignal(SIGINT, oldsigint); 524 (void)xsignal(SIGALRM, oldsigalrm); 525 if (code == 421 || originalcode == 421) 526 lostpeer(0); 527 if (abrtflag && oldsigint != cmdabort && oldsigint != SIG_IGN) 528 (*oldsigint)(SIGINT); 529 if (timeoutflag && oldsigalrm != cmdtimeout && 530 oldsigalrm != SIG_IGN) 531 (*oldsigalrm)(SIGINT); 532 return (n - '0'); 533 } 534 } 535 536 static int 537 empty(FILE *cin, FILE *din, int sec) 538 { 539 int nr, nfd; 540 struct pollfd pfd[2]; 541 542 nfd = 0; 543 if (cin) { 544 pfd[nfd].fd = fileno(cin); 545 pfd[nfd++].events = POLLIN; 546 } 547 548 if (din) { 549 pfd[nfd].fd = fileno(din); 550 pfd[nfd++].events = POLLIN; 551 } 552 553 if ((nr = ftp_poll(pfd, nfd, sec * 1000)) <= 0) 554 return nr; 555 556 nr = 0; 557 nfd = 0; 558 if (cin) 559 nr |= (pfd[nfd++].revents & POLLIN) ? 1 : 0; 560 if (din) 561 nr |= (pfd[nfd++].revents & POLLIN) ? 2 : 0; 562 return nr; 563 } 564 565 sigjmp_buf xferabort; 566 567 void 568 abortxfer(int notused) 569 { 570 char msgbuf[100]; 571 size_t len; 572 573 sigint_raised = 1; 574 alarmtimer(0); 575 mflag = 0; 576 abrtflag = 0; 577 switch (direction[0]) { 578 case 'r': 579 strlcpy(msgbuf, "\nreceive", sizeof(msgbuf)); 580 break; 581 case 's': 582 strlcpy(msgbuf, "\nsend", sizeof(msgbuf)); 583 break; 584 default: 585 errx(1, "abortxfer called with unknown direction `%s'", 586 direction); 587 } 588 len = strlcat(msgbuf, " aborted. Waiting for remote to finish abort.\n", 589 sizeof(msgbuf)); 590 write(fileno(ttyout), msgbuf, len); 591 siglongjmp(xferabort, 1); 592 } 593 594 void 595 sendrequest(const char *cmd, const char *local, const char *remote, 596 int printnames) 597 { 598 struct stat st; 599 int c, d; 600 FILE *fin, *dout; 601 int (*closefunc)(FILE *); 602 sigfunc oldintr, oldintp; 603 volatile off_t hashbytes; 604 char *lmode, *bufp; 605 static size_t bufsize; 606 static char *buf; 607 int oprogress; 608 609 #ifdef __GNUC__ /* to shut up gcc warnings */ 610 (void)&fin; 611 (void)&dout; 612 (void)&closefunc; 613 (void)&oldintr; 614 (void)&oldintp; 615 (void)&lmode; 616 fin = NULL; /* XXX gcc4 */ 617 #endif 618 619 hashbytes = mark; 620 direction = "sent"; 621 dout = NULL; 622 bytes = 0; 623 filesize = -1; 624 oprogress = progress; 625 if (verbose && printnames) { 626 if (*local != '-') 627 fprintf(ttyout, "local: %s ", local); 628 if (remote) 629 fprintf(ttyout, "remote: %s\n", remote); 630 } 631 if (proxy) { 632 proxtrans(cmd, local, remote); 633 return; 634 } 635 if (curtype != type) 636 changetype(type, 0); 637 closefunc = NULL; 638 oldintr = NULL; 639 oldintp = NULL; 640 lmode = "w"; 641 if (sigsetjmp(xferabort, 1)) { 642 while (cpend) 643 (void)getreply(0); 644 code = -1; 645 goto cleanupsend; 646 } 647 (void)xsignal(SIGQUIT, psummary); 648 oldintr = xsignal(SIGINT, abortxfer); 649 if (strcmp(local, "-") == 0) { 650 fin = stdin; 651 progress = 0; 652 } else if (*local == '|') { 653 oldintp = xsignal(SIGPIPE, SIG_IGN); 654 fin = popen(local + 1, "r"); 655 if (fin == NULL) { 656 warn("%s", local + 1); 657 code = -1; 658 goto cleanupsend; 659 } 660 progress = 0; 661 closefunc = pclose; 662 } else { 663 fin = fopen(local, "r"); 664 if (fin == NULL) { 665 warn("local: %s", local); 666 code = -1; 667 goto cleanupsend; 668 } 669 closefunc = fclose; 670 if (fstat(fileno(fin), &st) < 0 || !S_ISREG(st.st_mode)) { 671 fprintf(ttyout, "%s: not a plain file.\n", local); 672 code = -1; 673 goto cleanupsend; 674 } 675 filesize = st.st_size; 676 } 677 if (initconn()) { 678 code = -1; 679 goto cleanupsend; 680 } 681 if (sigsetjmp(xferabort, 1)) 682 goto abort; 683 684 if (restart_point && 685 (strcmp(cmd, "STOR") == 0 || strcmp(cmd, "APPE") == 0)) { 686 int rc; 687 688 rc = -1; 689 switch (curtype) { 690 case TYPE_A: 691 rc = fseeko(fin, restart_point, SEEK_SET); 692 break; 693 case TYPE_I: 694 case TYPE_L: 695 rc = lseek(fileno(fin), restart_point, SEEK_SET); 696 break; 697 } 698 if (rc < 0) { 699 warn("local: %s", local); 700 goto cleanupsend; 701 } 702 if (command("REST " LLF, (LLT)restart_point) != CONTINUE) 703 goto cleanupsend; 704 lmode = "r+"; 705 } 706 if (remote) { 707 if (command("%s %s", cmd, remote) != PRELIM) 708 goto cleanupsend; 709 } else { 710 if (command("%s", cmd) != PRELIM) 711 goto cleanupsend; 712 } 713 dirchange = 1; 714 dout = dataconn(lmode); 715 if (dout == NULL) 716 goto abort; 717 718 if (sndbuf_size > bufsize) { 719 if (buf) 720 (void)free(buf); 721 bufsize = sndbuf_size; 722 buf = ftp_malloc(bufsize); 723 } 724 725 progressmeter(-1); 726 oldintp = xsignal(SIGPIPE, SIG_IGN); 727 728 switch (curtype) { 729 730 case TYPE_I: 731 case TYPE_L: 732 if (rate_put) { /* rate limited */ 733 while (1) { 734 struct timeval then, now, td; 735 off_t bufrem; 736 737 (void)gettimeofday(&then, NULL); 738 errno = c = d = 0; 739 bufrem = rate_put; 740 while (bufrem > 0) { 741 if ((c = read(fileno(fin), buf, 742 MIN(bufsize, bufrem))) <= 0) 743 goto senddone; 744 bytes += c; 745 bufrem -= c; 746 for (bufp = buf; c > 0; 747 c -= d, bufp += d) 748 if ((d = write(fileno(dout), 749 bufp, c)) <= 0) 750 break; 751 if (d < 0) 752 goto senddone; 753 if (hash && 754 (!progress || filesize < 0) ) { 755 while (bytes >= hashbytes) { 756 (void)putc('#', ttyout); 757 hashbytes += mark; 758 } 759 (void)fflush(ttyout); 760 } 761 } 762 while (1) { 763 (void)gettimeofday(&now, NULL); 764 timersub(&now, &then, &td); 765 if (td.tv_sec > 0) 766 break; 767 usleep(1000000 - td.tv_usec); 768 } 769 } 770 } else { /* simpler/faster; no rate limit */ 771 while (1) { 772 errno = c = d = 0; 773 if ((c = read(fileno(fin), buf, bufsize)) <= 0) 774 goto senddone; 775 bytes += c; 776 for (bufp = buf; c > 0; c -= d, bufp += d) 777 if ((d = write(fileno(dout), bufp, c)) 778 <= 0) 779 break; 780 if (d < 0) 781 goto senddone; 782 if (hash && (!progress || filesize < 0) ) { 783 while (bytes >= hashbytes) { 784 (void)putc('#', ttyout); 785 hashbytes += mark; 786 } 787 (void)fflush(ttyout); 788 } 789 } 790 } 791 senddone: 792 if (hash && (!progress || filesize < 0) && bytes > 0) { 793 if (bytes < mark) 794 (void)putc('#', ttyout); 795 (void)putc('\n', ttyout); 796 } 797 if (c < 0) 798 warn("local: %s", local); 799 if (d < 0) { 800 if (errno != EPIPE) 801 warn("netout"); 802 bytes = -1; 803 } 804 break; 805 806 case TYPE_A: 807 while ((c = getc(fin)) != EOF) { 808 if (c == '\n') { 809 while (hash && (!progress || filesize < 0) && 810 (bytes >= hashbytes)) { 811 (void)putc('#', ttyout); 812 (void)fflush(ttyout); 813 hashbytes += mark; 814 } 815 if (ferror(dout)) 816 break; 817 (void)putc('\r', dout); 818 bytes++; 819 } 820 (void)putc(c, dout); 821 bytes++; 822 #if 0 /* this violates RFC */ 823 if (c == '\r') { 824 (void)putc('\0', dout); 825 bytes++; 826 } 827 #endif 828 } 829 if (hash && (!progress || filesize < 0)) { 830 if (bytes < hashbytes) 831 (void)putc('#', ttyout); 832 (void)putc('\n', ttyout); 833 } 834 if (ferror(fin)) 835 warn("local: %s", local); 836 if (ferror(dout)) { 837 if (errno != EPIPE) 838 warn("netout"); 839 bytes = -1; 840 } 841 break; 842 } 843 844 progressmeter(1); 845 if (closefunc != NULL) { 846 (*closefunc)(fin); 847 fin = NULL; 848 } 849 (void)fclose(dout); 850 dout = NULL; 851 (void)getreply(0); 852 if (bytes > 0) 853 ptransfer(0); 854 goto cleanupsend; 855 856 abort: 857 (void)xsignal(SIGINT, oldintr); 858 oldintr = NULL; 859 if (!cpend) { 860 code = -1; 861 goto cleanupsend; 862 } 863 if (data >= 0) { 864 (void)close(data); 865 data = -1; 866 } 867 if (dout) { 868 (void)fclose(dout); 869 dout = NULL; 870 } 871 (void)getreply(0); 872 code = -1; 873 if (bytes > 0) 874 ptransfer(0); 875 876 cleanupsend: 877 if (oldintr) 878 (void)xsignal(SIGINT, oldintr); 879 if (oldintp) 880 (void)xsignal(SIGPIPE, oldintp); 881 if (data >= 0) { 882 (void)close(data); 883 data = -1; 884 } 885 if (closefunc != NULL && fin != NULL) 886 (*closefunc)(fin); 887 if (dout) 888 (void)fclose(dout); 889 progress = oprogress; 890 restart_point = 0; 891 bytes = 0; 892 } 893 894 void 895 recvrequest(const char *cmd, const char *local, const char *remote, 896 const char *lmode, int printnames, int ignorespecial) 897 { 898 FILE *fout, *din; 899 int (*closefunc)(FILE *); 900 sigfunc oldintr, oldintp; 901 int c, d; 902 volatile int is_retr, tcrflag, bare_lfs; 903 static size_t bufsize; 904 static char *buf; 905 volatile off_t hashbytes; 906 struct stat st; 907 time_t mtime; 908 struct timeval tval[2]; 909 int oprogress; 910 int opreserve; 911 912 #ifdef __GNUC__ /* to shut up gcc warnings */ 913 (void)&local; 914 (void)&fout; 915 (void)&din; 916 (void)&closefunc; 917 (void)&oldintr; 918 (void)&oldintp; 919 #endif 920 921 fout = NULL; 922 din = NULL; 923 hashbytes = mark; 924 direction = "received"; 925 bytes = 0; 926 bare_lfs = 0; 927 filesize = -1; 928 oprogress = progress; 929 opreserve = preserve; 930 is_retr = (strcmp(cmd, "RETR") == 0); 931 if (is_retr && verbose && printnames) { 932 if (ignorespecial || *local != '-') 933 fprintf(ttyout, "local: %s ", local); 934 if (remote) 935 fprintf(ttyout, "remote: %s\n", remote); 936 } 937 if (proxy && is_retr) { 938 proxtrans(cmd, local, remote); 939 return; 940 } 941 closefunc = NULL; 942 oldintr = NULL; 943 oldintp = NULL; 944 tcrflag = !crflag && is_retr; 945 if (sigsetjmp(xferabort, 1)) { 946 while (cpend) 947 (void)getreply(0); 948 code = -1; 949 goto cleanuprecv; 950 } 951 (void)xsignal(SIGQUIT, psummary); 952 oldintr = xsignal(SIGINT, abortxfer); 953 if (ignorespecial || (strcmp(local, "-") && *local != '|')) { 954 if (access(local, W_OK) < 0) { 955 char *dir = strrchr(local, '/'); 956 957 if (errno != ENOENT && errno != EACCES) { 958 warn("local: %s", local); 959 code = -1; 960 goto cleanuprecv; 961 } 962 if (dir != NULL) 963 *dir = 0; 964 d = access(dir == local ? "/" : 965 dir ? local : ".", W_OK); 966 if (dir != NULL) 967 *dir = '/'; 968 if (d < 0) { 969 warn("local: %s", local); 970 code = -1; 971 goto cleanuprecv; 972 } 973 if (!runique && errno == EACCES && 974 chmod(local, (S_IRUSR|S_IWUSR)) < 0) { 975 warn("local: %s", local); 976 code = -1; 977 goto cleanuprecv; 978 } 979 if (runique && errno == EACCES && 980 (local = gunique(local)) == NULL) { 981 code = -1; 982 goto cleanuprecv; 983 } 984 } 985 else if (runique && (local = gunique(local)) == NULL) { 986 code = -1; 987 goto cleanuprecv; 988 } 989 } 990 if (!is_retr) { 991 if (curtype != TYPE_A) 992 changetype(TYPE_A, 0); 993 } else { 994 if (curtype != type) 995 changetype(type, 0); 996 filesize = remotesize(remote, 0); 997 if (code == 421 || code == -1) 998 goto cleanuprecv; 999 } 1000 if (initconn()) { 1001 code = -1; 1002 goto cleanuprecv; 1003 } 1004 if (sigsetjmp(xferabort, 1)) 1005 goto abort; 1006 if (is_retr && restart_point && 1007 command("REST " LLF, (LLT) restart_point) != CONTINUE) 1008 goto cleanuprecv; 1009 if (! EMPTYSTRING(remote)) { 1010 if (command("%s %s", cmd, remote) != PRELIM) 1011 goto cleanuprecv; 1012 } else { 1013 if (command("%s", cmd) != PRELIM) 1014 goto cleanuprecv; 1015 } 1016 din = dataconn("r"); 1017 if (din == NULL) 1018 goto abort; 1019 if (!ignorespecial && strcmp(local, "-") == 0) { 1020 fout = stdout; 1021 progress = 0; 1022 preserve = 0; 1023 } else if (!ignorespecial && *local == '|') { 1024 oldintp = xsignal(SIGPIPE, SIG_IGN); 1025 fout = popen(local + 1, "w"); 1026 if (fout == NULL) { 1027 warn("%s", local+1); 1028 goto abort; 1029 } 1030 progress = 0; 1031 preserve = 0; 1032 closefunc = pclose; 1033 } else { 1034 fout = fopen(local, lmode); 1035 if (fout == NULL) { 1036 warn("local: %s", local); 1037 goto abort; 1038 } 1039 closefunc = fclose; 1040 } 1041 1042 if (fstat(fileno(fout), &st) != -1 && !S_ISREG(st.st_mode)) { 1043 progress = 0; 1044 preserve = 0; 1045 } 1046 if (rcvbuf_size > bufsize) { 1047 if (buf) 1048 (void)free(buf); 1049 bufsize = rcvbuf_size; 1050 buf = ftp_malloc(bufsize); 1051 } 1052 1053 progressmeter(-1); 1054 1055 switch (curtype) { 1056 1057 case TYPE_I: 1058 case TYPE_L: 1059 if (is_retr && restart_point && 1060 lseek(fileno(fout), restart_point, SEEK_SET) < 0) { 1061 warn("local: %s", local); 1062 goto cleanuprecv; 1063 } 1064 if (rate_get) { /* rate limiting */ 1065 while (1) { 1066 struct timeval then, now, td; 1067 off_t bufrem; 1068 1069 (void)gettimeofday(&then, NULL); 1070 errno = c = d = 0; 1071 for (bufrem = rate_get; bufrem > 0; ) { 1072 if ((c = read(fileno(din), buf, 1073 MIN(bufsize, bufrem))) <= 0) 1074 goto recvdone; 1075 bytes += c; 1076 bufrem -=c; 1077 if ((d = write(fileno(fout), buf, c)) 1078 != c) 1079 goto recvdone; 1080 if (hash && 1081 (!progress || filesize < 0)) { 1082 while (bytes >= hashbytes) { 1083 (void)putc('#', ttyout); 1084 hashbytes += mark; 1085 } 1086 (void)fflush(ttyout); 1087 } 1088 } 1089 /* sleep until time is up */ 1090 while (1) { 1091 (void)gettimeofday(&now, NULL); 1092 timersub(&now, &then, &td); 1093 if (td.tv_sec > 0) 1094 break; 1095 usleep(1000000 - td.tv_usec); 1096 } 1097 } 1098 } else { /* faster code (no limiting) */ 1099 while (1) { 1100 errno = c = d = 0; 1101 if ((c = read(fileno(din), buf, bufsize)) <= 0) 1102 goto recvdone; 1103 bytes += c; 1104 if ((d = write(fileno(fout), buf, c)) != c) 1105 goto recvdone; 1106 if (hash && (!progress || filesize < 0)) { 1107 while (bytes >= hashbytes) { 1108 (void)putc('#', ttyout); 1109 hashbytes += mark; 1110 } 1111 (void)fflush(ttyout); 1112 } 1113 } 1114 } 1115 recvdone: 1116 if (hash && (!progress || filesize < 0) && bytes > 0) { 1117 if (bytes < mark) 1118 (void)putc('#', ttyout); 1119 (void)putc('\n', ttyout); 1120 } 1121 if (c < 0) { 1122 if (errno != EPIPE) 1123 warn("netin"); 1124 bytes = -1; 1125 } 1126 if (d < c) { 1127 if (d < 0) 1128 warn("local: %s", local); 1129 else 1130 warnx("%s: short write", local); 1131 } 1132 break; 1133 1134 case TYPE_A: 1135 if (is_retr && restart_point) { 1136 int ch; 1137 off_t i; 1138 1139 if (fseeko(fout, (off_t)0, SEEK_SET) < 0) 1140 goto done; 1141 for (i = 0; i++ < restart_point;) { 1142 if ((ch = getc(fout)) == EOF) 1143 goto done; 1144 if (ch == '\n') 1145 i++; 1146 } 1147 if (fseeko(fout, (off_t)0, SEEK_CUR) < 0) { 1148 done: 1149 warn("local: %s", local); 1150 goto cleanuprecv; 1151 } 1152 } 1153 while ((c = getc(din)) != EOF) { 1154 if (c == '\n') 1155 bare_lfs++; 1156 while (c == '\r') { 1157 while (hash && (!progress || filesize < 0) && 1158 (bytes >= hashbytes)) { 1159 (void)putc('#', ttyout); 1160 (void)fflush(ttyout); 1161 hashbytes += mark; 1162 } 1163 bytes++; 1164 if ((c = getc(din)) != '\n' || tcrflag) { 1165 if (ferror(fout)) 1166 goto break2; 1167 (void)putc('\r', fout); 1168 if (c == '\0') { 1169 bytes++; 1170 goto contin2; 1171 } 1172 if (c == EOF) 1173 goto contin2; 1174 } 1175 } 1176 (void)putc(c, fout); 1177 bytes++; 1178 contin2: ; 1179 } 1180 break2: 1181 if (hash && (!progress || filesize < 0)) { 1182 if (bytes < hashbytes) 1183 (void)putc('#', ttyout); 1184 (void)putc('\n', ttyout); 1185 } 1186 if (ferror(din)) { 1187 if (errno != EPIPE) 1188 warn("netin"); 1189 bytes = -1; 1190 } 1191 if (ferror(fout)) 1192 warn("local: %s", local); 1193 break; 1194 } 1195 1196 progressmeter(1); 1197 if (closefunc != NULL) { 1198 (*closefunc)(fout); 1199 fout = NULL; 1200 } 1201 (void)fclose(din); 1202 din = NULL; 1203 (void)getreply(0); 1204 if (bare_lfs) { 1205 fprintf(ttyout, 1206 "WARNING! %d bare linefeeds received in ASCII mode.\n", 1207 bare_lfs); 1208 fputs("File may not have transferred correctly.\n", ttyout); 1209 } 1210 if (bytes >= 0 && is_retr) { 1211 if (bytes > 0) 1212 ptransfer(0); 1213 if (preserve && (closefunc == fclose)) { 1214 mtime = remotemodtime(remote, 0); 1215 if (mtime != -1) { 1216 (void)gettimeofday(&tval[0], NULL); 1217 tval[1].tv_sec = mtime; 1218 tval[1].tv_usec = 0; 1219 if (utimes(local, tval) == -1) { 1220 fprintf(ttyout, 1221 "Can't change modification time on %s to %s", 1222 local, asctime(localtime(&mtime))); 1223 } 1224 } 1225 } 1226 } 1227 goto cleanuprecv; 1228 1229 abort: 1230 /* 1231 * abort using RFC 959 recommended IP,SYNC sequence 1232 */ 1233 if (! sigsetjmp(xferabort, 1)) { 1234 /* this is the first call */ 1235 (void)xsignal(SIGINT, abort_squared); 1236 if (!cpend) { 1237 code = -1; 1238 goto cleanuprecv; 1239 } 1240 abort_remote(din); 1241 } 1242 code = -1; 1243 if (bytes > 0) 1244 ptransfer(0); 1245 1246 cleanuprecv: 1247 if (oldintr) 1248 (void)xsignal(SIGINT, oldintr); 1249 if (oldintp) 1250 (void)xsignal(SIGPIPE, oldintp); 1251 if (data >= 0) { 1252 (void)close(data); 1253 data = -1; 1254 } 1255 if (closefunc != NULL && fout != NULL) 1256 (*closefunc)(fout); 1257 if (din) 1258 (void)fclose(din); 1259 progress = oprogress; 1260 preserve = opreserve; 1261 bytes = 0; 1262 } 1263 1264 /* 1265 * Need to start a listen on the data channel before we send the command, 1266 * otherwise the server's connect may fail. 1267 */ 1268 int 1269 initconn(void) 1270 { 1271 char *p, *a; 1272 int result, tmpno = 0; 1273 int on = 1; 1274 int error; 1275 unsigned int addr[16], port[2]; 1276 unsigned int af, hal, pal; 1277 socklen_t len; 1278 char *pasvcmd = NULL; 1279 1280 #ifdef INET6 1281 #ifndef NO_DEBUG 1282 if (myctladdr.su_family == AF_INET6 && ftp_debug && 1283 (IN6_IS_ADDR_LINKLOCAL(&myctladdr.si_su.su_sin6.sin6_addr) || 1284 IN6_IS_ADDR_SITELOCAL(&myctladdr.si_su.su_sin6.sin6_addr))) { 1285 warnx("use of scoped address can be troublesome"); 1286 } 1287 #endif 1288 #endif 1289 reinit: 1290 if (passivemode) { 1291 data_addr = myctladdr; 1292 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1293 if (data < 0) { 1294 warn("socket"); 1295 return (1); 1296 } 1297 if ((options & SO_DEBUG) && 1298 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1299 (void *)&on, sizeof(on)) == -1) { 1300 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1301 } 1302 result = COMPLETE + 1; 1303 switch (data_addr.su_family) { 1304 case AF_INET: 1305 if (epsv4 && !epsv4bad) { 1306 pasvcmd = "EPSV"; 1307 result = command("EPSV"); 1308 if (!connected) 1309 return (1); 1310 /* 1311 * this code is to be friendly with broken 1312 * BSDI ftpd 1313 */ 1314 if (code / 10 == 22 && code != 229) { 1315 fputs( 1316 "wrong server: return code must be 229\n", 1317 ttyout); 1318 result = COMPLETE + 1; 1319 } 1320 if (result != COMPLETE) { 1321 epsv4bad = 1; 1322 DPRINTF("disabling epsv4 for this " 1323 "connection\n"); 1324 } 1325 } 1326 if (result != COMPLETE) { 1327 pasvcmd = "PASV"; 1328 result = command("PASV"); 1329 if (!connected) 1330 return (1); 1331 } 1332 break; 1333 #ifdef INET6 1334 case AF_INET6: 1335 pasvcmd = "EPSV"; 1336 result = command("EPSV"); 1337 if (!connected) 1338 return (1); 1339 /* this code is to be friendly with broken BSDI ftpd */ 1340 if (code / 10 == 22 && code != 229) { 1341 fputs( 1342 "wrong server: return code must be 229\n", 1343 ttyout); 1344 result = COMPLETE + 1; 1345 } 1346 if (result != COMPLETE) { 1347 pasvcmd = "LPSV"; 1348 result = command("LPSV"); 1349 } 1350 if (!connected) 1351 return (1); 1352 break; 1353 #endif 1354 default: 1355 result = COMPLETE + 1; 1356 break; 1357 } 1358 if (result != COMPLETE) { 1359 if (activefallback) { 1360 (void)close(data); 1361 data = -1; 1362 passivemode = 0; 1363 #if 0 1364 activefallback = 0; 1365 #endif 1366 goto reinit; 1367 } 1368 fputs("Passive mode refused.\n", ttyout); 1369 goto bad; 1370 } 1371 1372 #define pack2(var, off) \ 1373 (((var[(off) + 0] & 0xff) << 8) | ((var[(off) + 1] & 0xff) << 0)) 1374 #define pack4(var, off) \ 1375 (((var[(off) + 0] & 0xff) << 24) | ((var[(off) + 1] & 0xff) << 16) | \ 1376 ((var[(off) + 2] & 0xff) << 8) | ((var[(off) + 3] & 0xff) << 0)) 1377 #define UC(b) (((int)b)&0xff) 1378 1379 /* 1380 * What we've got at this point is a string of comma separated 1381 * one-byte unsigned integer values, separated by commas. 1382 */ 1383 if (strcmp(pasvcmd, "PASV") == 0) { 1384 if (data_addr.su_family != AF_INET) { 1385 fputs( 1386 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1387 error = 1; 1388 goto bad; 1389 } 1390 if (code / 10 == 22 && code != 227) { 1391 fputs("wrong server: return code must be 227\n", 1392 ttyout); 1393 error = 1; 1394 goto bad; 1395 } 1396 error = sscanf(pasv, "%u,%u,%u,%u,%u,%u", 1397 &addr[0], &addr[1], &addr[2], &addr[3], 1398 &port[0], &port[1]); 1399 if (error != 6) { 1400 fputs( 1401 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1402 error = 1; 1403 goto bad; 1404 } 1405 error = 0; 1406 memset(&data_addr, 0, sizeof(data_addr)); 1407 data_addr.su_family = AF_INET; 1408 data_addr.su_len = sizeof(struct sockaddr_in); 1409 data_addr.si_su.su_sin.sin_addr.s_addr = 1410 htonl(pack4(addr, 0)); 1411 data_addr.su_port = htons(pack2(port, 0)); 1412 } else if (strcmp(pasvcmd, "LPSV") == 0) { 1413 if (code / 10 == 22 && code != 228) { 1414 fputs("wrong server: return code must be 228\n", 1415 ttyout); 1416 error = 1; 1417 goto bad; 1418 } 1419 switch (data_addr.su_family) { 1420 case AF_INET: 1421 error = sscanf(pasv, 1422 "%u,%u,%u,%u,%u,%u,%u,%u,%u", 1423 &af, &hal, 1424 &addr[0], &addr[1], &addr[2], &addr[3], 1425 &pal, &port[0], &port[1]); 1426 if (error != 9) { 1427 fputs( 1428 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1429 error = 1; 1430 goto bad; 1431 } 1432 if (af != 4 || hal != 4 || pal != 2) { 1433 fputs( 1434 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1435 error = 1; 1436 goto bad; 1437 } 1438 1439 error = 0; 1440 memset(&data_addr, 0, sizeof(data_addr)); 1441 data_addr.su_family = AF_INET; 1442 data_addr.su_len = sizeof(struct sockaddr_in); 1443 data_addr.si_su.su_sin.sin_addr.s_addr = 1444 htonl(pack4(addr, 0)); 1445 data_addr.su_port = htons(pack2(port, 0)); 1446 break; 1447 #ifdef INET6 1448 case AF_INET6: 1449 error = sscanf(pasv, 1450 "%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u,%u", 1451 &af, &hal, 1452 &addr[0], &addr[1], &addr[2], &addr[3], 1453 &addr[4], &addr[5], &addr[6], &addr[7], 1454 &addr[8], &addr[9], &addr[10], 1455 &addr[11], &addr[12], &addr[13], 1456 &addr[14], &addr[15], 1457 &pal, &port[0], &port[1]); 1458 if (error != 21) { 1459 fputs( 1460 "Passive mode address scan failure. Shouldn't happen!\n", ttyout); 1461 error = 1; 1462 goto bad; 1463 } 1464 if (af != 6 || hal != 16 || pal != 2) { 1465 fputs( 1466 "Passive mode AF mismatch. Shouldn't happen!\n", ttyout); 1467 error = 1; 1468 goto bad; 1469 } 1470 1471 error = 0; 1472 memset(&data_addr, 0, sizeof(data_addr)); 1473 data_addr.su_family = AF_INET6; 1474 data_addr.su_len = sizeof(struct sockaddr_in6); 1475 { 1476 int i; 1477 for (i = 0; i < sizeof(struct in6_addr); i++) { 1478 data_addr.si_su.su_sin6.sin6_addr.s6_addr[i] = 1479 UC(addr[i]); 1480 } 1481 } 1482 data_addr.su_port = htons(pack2(port, 0)); 1483 break; 1484 #endif 1485 default: 1486 error = 1; 1487 } 1488 } else if (strcmp(pasvcmd, "EPSV") == 0) { 1489 char delim[4]; 1490 1491 port[0] = 0; 1492 if (code / 10 == 22 && code != 229) { 1493 fputs("wrong server: return code must be 229\n", 1494 ttyout); 1495 error = 1; 1496 goto bad; 1497 } 1498 if (sscanf(pasv, "%c%c%c%d%c", &delim[0], 1499 &delim[1], &delim[2], &port[1], 1500 &delim[3]) != 5) { 1501 fputs("parse error!\n", ttyout); 1502 error = 1; 1503 goto bad; 1504 } 1505 if (delim[0] != delim[1] || delim[0] != delim[2] 1506 || delim[0] != delim[3]) { 1507 fputs("parse error!\n", ttyout); 1508 error = 1; 1509 goto bad; 1510 } 1511 data_addr = hisctladdr; 1512 data_addr.su_port = htons(port[1]); 1513 } else 1514 goto bad; 1515 1516 while (ftp_connect(data, (struct sockaddr *)&data_addr.si_su, 1517 data_addr.su_len) < 0) { 1518 if (activefallback) { 1519 (void)close(data); 1520 data = -1; 1521 passivemode = 0; 1522 #if 0 1523 activefallback = 0; 1524 #endif 1525 goto reinit; 1526 } 1527 warn("connect for data channel"); 1528 goto bad; 1529 } 1530 #ifdef IPTOS_THROUGHPUT 1531 if (data_addr.su_family == AF_INET) { 1532 on = IPTOS_THROUGHPUT; 1533 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1534 (void *)&on, sizeof(on)) == -1) { 1535 DWARN("setsockopt %s (ignored)", 1536 "IPTOS_THROUGHPUT"); 1537 } 1538 } 1539 #endif 1540 return (0); 1541 } 1542 1543 noport: 1544 data_addr = myctladdr; 1545 if (sendport) 1546 data_addr.su_port = 0; /* let system pick one */ 1547 if (data != -1) 1548 (void)close(data); 1549 data = socket(data_addr.su_family, SOCK_STREAM, 0); 1550 if (data < 0) { 1551 warn("socket"); 1552 if (tmpno) 1553 sendport = 1; 1554 return (1); 1555 } 1556 if (!sendport) 1557 if (setsockopt(data, SOL_SOCKET, SO_REUSEADDR, 1558 (void *)&on, sizeof(on)) == -1) { 1559 warn("setsockopt %s", "SO_REUSEADDR"); 1560 goto bad; 1561 } 1562 if (bind(data, (struct sockaddr *)&data_addr.si_su, 1563 data_addr.su_len) < 0) { 1564 warn("bind"); 1565 goto bad; 1566 } 1567 if ((options & SO_DEBUG) && 1568 setsockopt(data, SOL_SOCKET, SO_DEBUG, 1569 (void *)&on, sizeof(on)) == -1) { 1570 DWARN("setsockopt %s (ignored)", "SO_DEBUG"); 1571 } 1572 len = sizeof(data_addr.si_su); 1573 memset((char *)&data_addr, 0, sizeof (data_addr)); 1574 if (getsockname(data, (struct sockaddr *)&data_addr.si_su, &len) == -1) { 1575 warn("getsockname"); 1576 goto bad; 1577 } 1578 data_addr.su_len = len; 1579 if (ftp_listen(data, 1) < 0) 1580 warn("listen"); 1581 1582 if (sendport) { 1583 char hname[NI_MAXHOST], sname[NI_MAXSERV]; 1584 int af; 1585 struct sockinet tmp; 1586 1587 switch (data_addr.su_family) { 1588 case AF_INET: 1589 if (!epsv4 || epsv4bad) { 1590 result = COMPLETE + 1; 1591 break; 1592 } 1593 /* FALLTHROUGH */ 1594 #ifdef INET6 1595 case AF_INET6: 1596 #endif 1597 af = (data_addr.su_family == AF_INET) ? 1 : 2; 1598 tmp = data_addr; 1599 #ifdef INET6 1600 if (tmp.su_family == AF_INET6) 1601 tmp.si_su.su_sin6.sin6_scope_id = 0; 1602 #endif 1603 if (getnameinfo((struct sockaddr *)&tmp.si_su, 1604 tmp.su_len, hname, sizeof(hname), sname, 1605 sizeof(sname), NI_NUMERICHOST | NI_NUMERICSERV)) { 1606 result = ERROR; 1607 } else { 1608 result = command("EPRT |%d|%s|%s|", af, hname, 1609 sname); 1610 if (!connected) 1611 return (1); 1612 if (result != COMPLETE) { 1613 epsv4bad = 1; 1614 DPRINTF("disabling epsv4 for this " 1615 "connection\n"); 1616 } 1617 } 1618 break; 1619 default: 1620 result = COMPLETE + 1; 1621 break; 1622 } 1623 if (result == COMPLETE) 1624 goto skip_port; 1625 1626 switch (data_addr.su_family) { 1627 case AF_INET: 1628 a = (char *)&data_addr.si_su.su_sin.sin_addr; 1629 p = (char *)&data_addr.su_port; 1630 result = command("PORT %d,%d,%d,%d,%d,%d", 1631 UC(a[0]), UC(a[1]), UC(a[2]), UC(a[3]), 1632 UC(p[0]), UC(p[1])); 1633 break; 1634 #ifdef INET6 1635 case AF_INET6: 1636 a = (char *)&data_addr.si_su.su_sin6.sin6_addr; 1637 p = (char *)&data_addr.su_port; 1638 result = command( 1639 "LPRT %d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d", 1640 6, 16, 1641 UC(a[0]),UC(a[1]),UC(a[2]),UC(a[3]), 1642 UC(a[4]),UC(a[5]),UC(a[6]),UC(a[7]), 1643 UC(a[8]),UC(a[9]),UC(a[10]),UC(a[11]), 1644 UC(a[12]),UC(a[13]),UC(a[14]),UC(a[15]), 1645 2, UC(p[0]), UC(p[1])); 1646 break; 1647 #endif 1648 default: 1649 result = COMPLETE + 1; /* xxx */ 1650 } 1651 if (!connected) 1652 return (1); 1653 skip_port: 1654 1655 if (result == ERROR && sendport == -1) { 1656 sendport = 0; 1657 tmpno = 1; 1658 goto noport; 1659 } 1660 return (result != COMPLETE); 1661 } 1662 if (tmpno) 1663 sendport = 1; 1664 #ifdef IPTOS_THROUGHPUT 1665 if (data_addr.su_family == AF_INET) { 1666 on = IPTOS_THROUGHPUT; 1667 if (setsockopt(data, IPPROTO_IP, IP_TOS, 1668 (void *)&on, sizeof(on)) == -1) 1669 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1670 } 1671 #endif 1672 return (0); 1673 bad: 1674 (void)close(data); 1675 data = -1; 1676 if (tmpno) 1677 sendport = 1; 1678 return (1); 1679 } 1680 1681 FILE * 1682 dataconn(const char *lmode) 1683 { 1684 struct sockinet from; 1685 int s, flags, rv, timeout; 1686 struct timeval endtime, now, td; 1687 struct pollfd pfd[1]; 1688 socklen_t fromlen; 1689 1690 if (passivemode) /* passive data connection */ 1691 return (fdopen(data, lmode)); 1692 1693 /* active mode data connection */ 1694 1695 if ((flags = fcntl(data, F_GETFL, 0)) == -1) 1696 goto dataconn_failed; /* get current socket flags */ 1697 if (fcntl(data, F_SETFL, flags | O_NONBLOCK) == -1) 1698 goto dataconn_failed; /* set non-blocking connect */ 1699 1700 /* NOTE: we now must restore socket flags on successful exit */ 1701 1702 /* limit time waiting on listening socket */ 1703 pfd[0].fd = data; 1704 pfd[0].events = POLLIN; 1705 (void)gettimeofday(&endtime, NULL); /* determine end time */ 1706 endtime.tv_sec += (quit_time > 0) ? quit_time: 60; 1707 /* without -q, default to 60s */ 1708 do { 1709 (void)gettimeofday(&now, NULL); 1710 timersub(&endtime, &now, &td); 1711 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1712 if (timeout < 0) 1713 timeout = 0; 1714 rv = ftp_poll(pfd, 1, timeout); 1715 } while (rv == -1 && errno == EINTR); /* loop until poll ! EINTR */ 1716 if (rv == -1) { 1717 warn("poll waiting before accept"); 1718 goto dataconn_failed; 1719 } 1720 if (rv == 0) { 1721 warn("poll timeout waiting before accept"); 1722 goto dataconn_failed; 1723 } 1724 1725 /* (non-blocking) accept the connection */ 1726 fromlen = myctladdr.su_len; 1727 do { 1728 s = accept(data, (struct sockaddr *) &from.si_su, &fromlen); 1729 } while (s == -1 && errno == EINTR); /* loop until accept ! EINTR */ 1730 if (s == -1) { 1731 warn("accept"); 1732 goto dataconn_failed; 1733 } 1734 1735 (void)close(data); 1736 data = s; 1737 if (fcntl(data, F_SETFL, flags) == -1) /* restore socket flags */ 1738 goto dataconn_failed; 1739 1740 #ifdef IPTOS_THROUGHPUT 1741 if (from.su_family == AF_INET) { 1742 int tos = IPTOS_THROUGHPUT; 1743 if (setsockopt(s, IPPROTO_IP, IP_TOS, 1744 (void *)&tos, sizeof(tos)) == -1) { 1745 DWARN("setsockopt %s (ignored)", "IPTOS_THROUGHPUT"); 1746 } 1747 } 1748 #endif 1749 return (fdopen(data, lmode)); 1750 1751 dataconn_failed: 1752 (void)close(data); 1753 data = -1; 1754 return (NULL); 1755 } 1756 1757 void 1758 psabort(int notused) 1759 { 1760 int oerrno = errno; 1761 1762 sigint_raised = 1; 1763 alarmtimer(0); 1764 abrtflag++; 1765 errno = oerrno; 1766 } 1767 1768 void 1769 pswitch(int flag) 1770 { 1771 sigfunc oldintr; 1772 static struct comvars { 1773 int connect; 1774 char name[MAXHOSTNAMELEN]; 1775 struct sockinet mctl; 1776 struct sockinet hctl; 1777 FILE *in; 1778 FILE *out; 1779 int tpe; 1780 int curtpe; 1781 int cpnd; 1782 int sunqe; 1783 int runqe; 1784 int mcse; 1785 int ntflg; 1786 char nti[17]; 1787 char nto[17]; 1788 int mapflg; 1789 char mi[MAXPATHLEN]; 1790 char mo[MAXPATHLEN]; 1791 } proxstruct, tmpstruct; 1792 struct comvars *ip, *op; 1793 1794 abrtflag = 0; 1795 oldintr = xsignal(SIGINT, psabort); 1796 if (flag) { 1797 if (proxy) 1798 return; 1799 ip = &tmpstruct; 1800 op = &proxstruct; 1801 proxy++; 1802 } else { 1803 if (!proxy) 1804 return; 1805 ip = &proxstruct; 1806 op = &tmpstruct; 1807 proxy = 0; 1808 } 1809 ip->connect = connected; 1810 connected = op->connect; 1811 if (hostname) 1812 (void)strlcpy(ip->name, hostname, sizeof(ip->name)); 1813 else 1814 ip->name[0] = '\0'; 1815 hostname = op->name; 1816 ip->hctl = hisctladdr; 1817 hisctladdr = op->hctl; 1818 ip->mctl = myctladdr; 1819 myctladdr = op->mctl; 1820 ip->in = cin; 1821 cin = op->in; 1822 ip->out = cout; 1823 cout = op->out; 1824 ip->tpe = type; 1825 type = op->tpe; 1826 ip->curtpe = curtype; 1827 curtype = op->curtpe; 1828 ip->cpnd = cpend; 1829 cpend = op->cpnd; 1830 ip->sunqe = sunique; 1831 sunique = op->sunqe; 1832 ip->runqe = runique; 1833 runique = op->runqe; 1834 ip->mcse = mcase; 1835 mcase = op->mcse; 1836 ip->ntflg = ntflag; 1837 ntflag = op->ntflg; 1838 (void)strlcpy(ip->nti, ntin, sizeof(ip->nti)); 1839 (void)strlcpy(ntin, op->nti, sizeof(ntin)); 1840 (void)strlcpy(ip->nto, ntout, sizeof(ip->nto)); 1841 (void)strlcpy(ntout, op->nto, sizeof(ntout)); 1842 ip->mapflg = mapflag; 1843 mapflag = op->mapflg; 1844 (void)strlcpy(ip->mi, mapin, sizeof(ip->mi)); 1845 (void)strlcpy(mapin, op->mi, sizeof(mapin)); 1846 (void)strlcpy(ip->mo, mapout, sizeof(ip->mo)); 1847 (void)strlcpy(mapout, op->mo, sizeof(mapout)); 1848 (void)xsignal(SIGINT, oldintr); 1849 if (abrtflag) { 1850 abrtflag = 0; 1851 (*oldintr)(SIGINT); 1852 } 1853 } 1854 1855 void 1856 abortpt(int notused) 1857 { 1858 1859 sigint_raised = 1; 1860 alarmtimer(0); 1861 if (fromatty) 1862 write(fileno(ttyout), "\n", 1); 1863 ptabflg++; 1864 mflag = 0; 1865 abrtflag = 0; 1866 siglongjmp(ptabort, 1); 1867 } 1868 1869 void 1870 proxtrans(const char *cmd, const char *local, const char *remote) 1871 { 1872 sigfunc oldintr; 1873 int prox_type, nfnd; 1874 volatile int secndflag; 1875 char *cmd2; 1876 1877 #ifdef __GNUC__ /* to shut up gcc warnings */ 1878 (void)&oldintr; 1879 (void)&cmd2; 1880 #endif 1881 1882 oldintr = NULL; 1883 secndflag = 0; 1884 if (strcmp(cmd, "RETR")) 1885 cmd2 = "RETR"; 1886 else 1887 cmd2 = runique ? "STOU" : "STOR"; 1888 if ((prox_type = type) == 0) { 1889 if (unix_server && unix_proxy) 1890 prox_type = TYPE_I; 1891 else 1892 prox_type = TYPE_A; 1893 } 1894 if (curtype != prox_type) 1895 changetype(prox_type, 1); 1896 if (command("PASV") != COMPLETE) { 1897 fputs("proxy server does not support third party transfers.\n", 1898 ttyout); 1899 return; 1900 } 1901 pswitch(0); 1902 if (!connected) { 1903 fputs("No primary connection.\n", ttyout); 1904 pswitch(1); 1905 code = -1; 1906 return; 1907 } 1908 if (curtype != prox_type) 1909 changetype(prox_type, 1); 1910 if (command("PORT %s", pasv) != COMPLETE) { 1911 pswitch(1); 1912 return; 1913 } 1914 if (sigsetjmp(ptabort, 1)) 1915 goto abort; 1916 oldintr = xsignal(SIGINT, abortpt); 1917 if ((restart_point && 1918 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1919 || (command("%s %s", cmd, remote) != PRELIM)) { 1920 (void)xsignal(SIGINT, oldintr); 1921 pswitch(1); 1922 return; 1923 } 1924 sleep(2); 1925 pswitch(1); 1926 secndflag++; 1927 if ((restart_point && 1928 (command("REST " LLF, (LLT) restart_point) != CONTINUE)) 1929 || (command("%s %s", cmd2, local) != PRELIM)) 1930 goto abort; 1931 ptflag++; 1932 (void)getreply(0); 1933 pswitch(0); 1934 (void)getreply(0); 1935 (void)xsignal(SIGINT, oldintr); 1936 pswitch(1); 1937 ptflag = 0; 1938 fprintf(ttyout, "local: %s remote: %s\n", local, remote); 1939 return; 1940 abort: 1941 if (sigsetjmp(xferabort, 1)) { 1942 (void)xsignal(SIGINT, oldintr); 1943 return; 1944 } 1945 (void)xsignal(SIGINT, abort_squared); 1946 ptflag = 0; 1947 if (strcmp(cmd, "RETR") && !proxy) 1948 pswitch(1); 1949 else if (!strcmp(cmd, "RETR") && proxy) 1950 pswitch(0); 1951 if (!cpend && !secndflag) { /* only here if cmd = "STOR" (proxy=1) */ 1952 if (command("%s %s", cmd2, local) != PRELIM) { 1953 pswitch(0); 1954 if (cpend) 1955 abort_remote(NULL); 1956 } 1957 pswitch(1); 1958 if (ptabflg) 1959 code = -1; 1960 (void)xsignal(SIGINT, oldintr); 1961 return; 1962 } 1963 if (cpend) 1964 abort_remote(NULL); 1965 pswitch(!proxy); 1966 if (!cpend && !secndflag) { /* only if cmd = "RETR" (proxy=1) */ 1967 if (command("%s %s", cmd2, local) != PRELIM) { 1968 pswitch(0); 1969 if (cpend) 1970 abort_remote(NULL); 1971 pswitch(1); 1972 if (ptabflg) 1973 code = -1; 1974 (void)xsignal(SIGINT, oldintr); 1975 return; 1976 } 1977 } 1978 if (cpend) 1979 abort_remote(NULL); 1980 pswitch(!proxy); 1981 if (cpend) { 1982 if ((nfnd = empty(cin, NULL, 10)) <= 0) { 1983 if (nfnd < 0) 1984 warn("abort"); 1985 if (ptabflg) 1986 code = -1; 1987 lostpeer(0); 1988 } 1989 (void)getreply(0); 1990 (void)getreply(0); 1991 } 1992 if (proxy) 1993 pswitch(0); 1994 pswitch(1); 1995 if (ptabflg) 1996 code = -1; 1997 (void)xsignal(SIGINT, oldintr); 1998 } 1999 2000 void 2001 reset(int argc, char *argv[]) 2002 { 2003 int nfnd = 1; 2004 2005 if (argc == 0 && argv != NULL) { 2006 UPRINTF("usage: %s\n", argv[0]); 2007 code = -1; 2008 return; 2009 } 2010 while (nfnd > 0) { 2011 if ((nfnd = empty(cin, NULL, 0)) < 0) { 2012 warn("reset"); 2013 code = -1; 2014 lostpeer(0); 2015 } else if (nfnd) 2016 (void)getreply(0); 2017 } 2018 } 2019 2020 char * 2021 gunique(const char *local) 2022 { 2023 static char new[MAXPATHLEN]; 2024 char *cp = strrchr(local, '/'); 2025 int d, count=0, len; 2026 char ext = '1'; 2027 2028 if (cp) 2029 *cp = '\0'; 2030 d = access(cp == local ? "/" : cp ? local : ".", W_OK); 2031 if (cp) 2032 *cp = '/'; 2033 if (d < 0) { 2034 warn("local: %s", local); 2035 return (NULL); 2036 } 2037 len = strlcpy(new, local, sizeof(new)); 2038 cp = &new[len]; 2039 *cp++ = '.'; 2040 while (!d) { 2041 if (++count == 100) { 2042 fputs("runique: can't find unique file name.\n", 2043 ttyout); 2044 return (NULL); 2045 } 2046 *cp++ = ext; 2047 *cp = '\0'; 2048 if (ext == '9') 2049 ext = '0'; 2050 else 2051 ext++; 2052 if ((d = access(new, F_OK)) < 0) 2053 break; 2054 if (ext != '0') 2055 cp--; 2056 else if (*(cp - 2) == '.') 2057 *(cp - 1) = '1'; 2058 else { 2059 *(cp - 2) = *(cp - 2) + 1; 2060 cp--; 2061 } 2062 } 2063 return (new); 2064 } 2065 2066 /* 2067 * abort_squared -- 2068 * aborts abort_remote(). lostpeer() is called because if the user is 2069 * too impatient to wait or there's another problem then ftp really 2070 * needs to get back to a known state. 2071 */ 2072 void 2073 abort_squared(int dummy) 2074 { 2075 char msgbuf[100]; 2076 size_t len; 2077 2078 sigint_raised = 1; 2079 alarmtimer(0); 2080 len = strlcpy(msgbuf, "\nremote abort aborted; closing connection.\n", 2081 sizeof(msgbuf)); 2082 write(fileno(ttyout), msgbuf, len); 2083 lostpeer(0); 2084 siglongjmp(xferabort, 1); 2085 } 2086 2087 void 2088 abort_remote(FILE *din) 2089 { 2090 char buf[BUFSIZ]; 2091 int nfnd; 2092 2093 if (cout == NULL) { 2094 warnx("Lost control connection for abort."); 2095 if (ptabflg) 2096 code = -1; 2097 lostpeer(0); 2098 return; 2099 } 2100 /* 2101 * send IAC in urgent mode instead of DM because 4.3BSD places oob mark 2102 * after urgent byte rather than before as is protocol now 2103 */ 2104 buf[0] = IAC; 2105 buf[1] = IP; 2106 buf[2] = IAC; 2107 if (send(fileno(cout), buf, 3, MSG_OOB) != 3) 2108 warn("abort"); 2109 fprintf(cout, "%cABOR\r\n", DM); 2110 (void)fflush(cout); 2111 if ((nfnd = empty(cin, din, 10)) <= 0) { 2112 if (nfnd < 0) 2113 warn("abort"); 2114 if (ptabflg) 2115 code = -1; 2116 lostpeer(0); 2117 } 2118 if (din && (nfnd & 2)) { 2119 while (read(fileno(din), buf, BUFSIZ) > 0) 2120 continue; 2121 } 2122 if (getreply(0) == ERROR && code == 552) { 2123 /* 552 needed for nic style abort */ 2124 (void)getreply(0); 2125 } 2126 (void)getreply(0); 2127 } 2128 2129 void 2130 ai_unmapped(struct addrinfo *ai) 2131 { 2132 #ifdef INET6 2133 struct sockaddr_in6 *sin6; 2134 struct sockaddr_in sin; 2135 socklen_t len; 2136 2137 if (ai->ai_family != AF_INET6) 2138 return; 2139 if (ai->ai_addrlen != sizeof(struct sockaddr_in6) || 2140 sizeof(sin) > ai->ai_addrlen) 2141 return; 2142 sin6 = (struct sockaddr_in6 *)ai->ai_addr; 2143 if (!IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) 2144 return; 2145 2146 memset(&sin, 0, sizeof(sin)); 2147 sin.sin_family = AF_INET; 2148 len = sizeof(struct sockaddr_in); 2149 memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12], 2150 sizeof(sin.sin_addr)); 2151 sin.sin_port = sin6->sin6_port; 2152 2153 ai->ai_family = AF_INET; 2154 #if HAVE_SOCKADDR_SA_LEN 2155 sin.sin_len = len; 2156 #endif 2157 memcpy(ai->ai_addr, &sin, len); 2158 ai->ai_addrlen = len; 2159 #endif 2160 } 2161 2162 #ifdef NO_USAGE 2163 void 2164 xusage(void) 2165 { 2166 fputs("Usage error\n", ttyout); 2167 } 2168 #endif 2169