1 /* $NetBSD: util.c,v 1.145 2008/04/22 12:59:33 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2008 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 * This code is derived from software contributed to The NetBSD Foundation 11 * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility, 12 * NASA Ames Research Center. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 3. All advertising materials mentioning features or use of this software 23 * must display the following acknowledgement: 24 * This product includes software developed by the NetBSD 25 * Foundation, Inc. and its contributors. 26 * 4. Neither the name of The NetBSD Foundation nor the names of its 27 * contributors may be used to endorse or promote products derived 28 * from this software without specific prior written permission. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 32 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 33 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 34 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 35 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 36 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 37 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 38 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 39 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 40 * POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 /* 44 * Copyright (c) 1985, 1989, 1993, 1994 45 * The Regents of the University of California. All rights reserved. 46 * 47 * Redistribution and use in source and binary forms, with or without 48 * modification, are permitted provided that the following conditions 49 * are met: 50 * 1. Redistributions of source code must retain the above copyright 51 * notice, this list of conditions and the following disclaimer. 52 * 2. Redistributions in binary form must reproduce the above copyright 53 * notice, this list of conditions and the following disclaimer in the 54 * documentation and/or other materials provided with the distribution. 55 * 3. Neither the name of the University nor the names of its contributors 56 * may be used to endorse or promote products derived from this software 57 * without specific prior written permission. 58 * 59 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 60 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 61 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 62 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 63 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 64 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 65 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 66 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 67 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 68 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 69 * SUCH DAMAGE. 70 */ 71 72 #include <sys/cdefs.h> 73 #ifndef lint 74 __RCSID("$NetBSD: util.c,v 1.145 2008/04/22 12:59:33 lukem Exp $"); 75 #endif /* not lint */ 76 77 /* 78 * FTP User Program -- Misc support routines 79 */ 80 #include <sys/param.h> 81 #include <sys/socket.h> 82 #include <sys/ioctl.h> 83 #include <sys/time.h> 84 #include <netinet/in.h> 85 #include <arpa/ftp.h> 86 87 #include <ctype.h> 88 #include <err.h> 89 #include <errno.h> 90 #include <fcntl.h> 91 #include <glob.h> 92 #include <signal.h> 93 #include <libgen.h> 94 #include <limits.h> 95 #include <netdb.h> 96 #include <stdio.h> 97 #include <stdlib.h> 98 #include <string.h> 99 #include <termios.h> 100 #include <time.h> 101 #include <tzfile.h> 102 #include <unistd.h> 103 104 #include "ftp_var.h" 105 106 /* 107 * Connect to peer server and auto-login, if possible. 108 */ 109 void 110 setpeer(int argc, char *argv[]) 111 { 112 char *host; 113 char *port; 114 115 if (argc == 0) 116 goto usage; 117 if (connected) { 118 fprintf(ttyout, "Already connected to %s, use close first.\n", 119 hostname); 120 code = -1; 121 return; 122 } 123 if (argc < 2) 124 (void)another(&argc, &argv, "to"); 125 if (argc < 2 || argc > 3) { 126 usage: 127 UPRINTF("usage: %s host-name [port]\n", argv[0]); 128 code = -1; 129 return; 130 } 131 if (gatemode) 132 port = gateport; 133 else 134 port = ftpport; 135 if (argc > 2) 136 port = argv[2]; 137 138 if (gatemode) { 139 if (gateserver == NULL || *gateserver == '\0') 140 errx(1, "main: gateserver not defined"); 141 host = hookup(gateserver, port); 142 } else 143 host = hookup(argv[1], port); 144 145 if (host) { 146 if (gatemode && verbose) { 147 fprintf(ttyout, 148 "Connecting via pass-through server %s\n", 149 gateserver); 150 } 151 152 connected = 1; 153 /* 154 * Set up defaults for FTP. 155 */ 156 (void)strlcpy(typename, "ascii", sizeof(typename)); 157 type = TYPE_A; 158 curtype = TYPE_A; 159 (void)strlcpy(formname, "non-print", sizeof(formname)); 160 form = FORM_N; 161 (void)strlcpy(modename, "stream", sizeof(modename)); 162 mode = MODE_S; 163 (void)strlcpy(structname, "file", sizeof(structname)); 164 stru = STRU_F; 165 (void)strlcpy(bytename, "8", sizeof(bytename)); 166 bytesize = 8; 167 if (autologin) 168 (void)ftp_login(argv[1], NULL, NULL); 169 } 170 } 171 172 static void 173 parse_feat(const char *line) 174 { 175 176 /* 177 * work-around broken ProFTPd servers that can't 178 * even obey RFC2389. 179 */ 180 while (*line && isspace((int)*line)) 181 line++; 182 183 if (strcasecmp(line, "MDTM") == 0) 184 features[FEAT_MDTM] = 1; 185 else if (strncasecmp(line, "MLST", sizeof("MLST") - 1) == 0) { 186 features[FEAT_MLST] = 1; 187 } else if (strcasecmp(line, "REST STREAM") == 0) 188 features[FEAT_REST_STREAM] = 1; 189 else if (strcasecmp(line, "SIZE") == 0) 190 features[FEAT_SIZE] = 1; 191 else if (strcasecmp(line, "TVFS") == 0) 192 features[FEAT_TVFS] = 1; 193 } 194 195 /* 196 * Determine the remote system type (SYST) and features (FEAT). 197 * Call after a successful login (i.e, connected = -1) 198 */ 199 void 200 getremoteinfo(void) 201 { 202 int overbose, i; 203 204 overbose = verbose; 205 if (ftp_debug == 0) 206 verbose = -1; 207 208 /* determine remote system type */ 209 if (command("SYST") == COMPLETE) { 210 if (overbose) { 211 char *cp, c; 212 213 c = 0; 214 cp = strchr(reply_string + 4, ' '); 215 if (cp == NULL) 216 cp = strchr(reply_string + 4, '\r'); 217 if (cp) { 218 if (cp[-1] == '.') 219 cp--; 220 c = *cp; 221 *cp = '\0'; 222 } 223 224 fprintf(ttyout, "Remote system type is %s.\n", 225 reply_string + 4); 226 if (cp) 227 *cp = c; 228 } 229 if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) { 230 if (proxy) 231 unix_proxy = 1; 232 else 233 unix_server = 1; 234 /* 235 * Set type to 0 (not specified by user), 236 * meaning binary by default, but don't bother 237 * telling server. We can use binary 238 * for text files unless changed by the user. 239 */ 240 type = 0; 241 (void)strlcpy(typename, "binary", sizeof(typename)); 242 if (overbose) 243 fprintf(ttyout, 244 "Using %s mode to transfer files.\n", 245 typename); 246 } else { 247 if (proxy) 248 unix_proxy = 0; 249 else 250 unix_server = 0; 251 if (overbose && 252 !strncmp(reply_string, "215 TOPS20", 10)) 253 fputs( 254 "Remember to set tenex mode when transferring binary files from this machine.\n", 255 ttyout); 256 } 257 } 258 259 /* determine features (if any) */ 260 for (i = 0; i < FEAT_max; i++) 261 features[i] = -1; 262 reply_callback = parse_feat; 263 if (command("FEAT") == COMPLETE) { 264 for (i = 0; i < FEAT_max; i++) { 265 if (features[i] == -1) 266 features[i] = 0; 267 } 268 features[FEAT_FEAT] = 1; 269 } else 270 features[FEAT_FEAT] = 0; 271 #ifndef NO_DEBUG 272 if (ftp_debug) { 273 #define DEBUG_FEAT(x) fprintf(ttyout, "features[" #x "] = %d\n", features[(x)]) 274 DEBUG_FEAT(FEAT_FEAT); 275 DEBUG_FEAT(FEAT_MDTM); 276 DEBUG_FEAT(FEAT_MLST); 277 DEBUG_FEAT(FEAT_REST_STREAM); 278 DEBUG_FEAT(FEAT_SIZE); 279 DEBUG_FEAT(FEAT_TVFS); 280 #undef DEBUG_FEAT 281 } 282 #endif 283 reply_callback = NULL; 284 285 verbose = overbose; 286 } 287 288 /* 289 * Reset the various variables that indicate connection state back to 290 * disconnected settings. 291 * The caller is responsible for issuing any commands to the remote server 292 * to perform a clean shutdown before this is invoked. 293 */ 294 void 295 cleanuppeer(void) 296 { 297 298 if (cout) 299 (void)fclose(cout); 300 cout = NULL; 301 connected = 0; 302 unix_server = 0; 303 unix_proxy = 0; 304 /* 305 * determine if anonftp was specifically set with -a 306 * (1), or implicitly set by auto_fetch() (2). in the 307 * latter case, disable after the current xfer 308 */ 309 if (anonftp == 2) 310 anonftp = 0; 311 data = -1; 312 epsv4bad = 0; 313 if (username) 314 free(username); 315 username = NULL; 316 if (!proxy) 317 macnum = 0; 318 } 319 320 /* 321 * Top-level signal handler for interrupted commands. 322 */ 323 void 324 intr(int signo) 325 { 326 327 sigint_raised = 1; 328 alarmtimer(0); 329 if (fromatty) 330 write(fileno(ttyout), "\n", 1); 331 siglongjmp(toplevel, 1); 332 } 333 334 /* 335 * Signal handler for lost connections; cleanup various elements of 336 * the connection state, and call cleanuppeer() to finish it off. 337 */ 338 void 339 lostpeer(int dummy) 340 { 341 int oerrno = errno; 342 343 alarmtimer(0); 344 if (connected) { 345 if (cout != NULL) { 346 (void)shutdown(fileno(cout), 1+1); 347 (void)fclose(cout); 348 cout = NULL; 349 } 350 if (data >= 0) { 351 (void)shutdown(data, 1+1); 352 (void)close(data); 353 data = -1; 354 } 355 connected = 0; 356 } 357 pswitch(1); 358 if (connected) { 359 if (cout != NULL) { 360 (void)shutdown(fileno(cout), 1+1); 361 (void)fclose(cout); 362 cout = NULL; 363 } 364 connected = 0; 365 } 366 proxflag = 0; 367 pswitch(0); 368 cleanuppeer(); 369 errno = oerrno; 370 } 371 372 373 /* 374 * Login to remote host, using given username & password if supplied. 375 * Return non-zero if successful. 376 */ 377 int 378 ftp_login(const char *host, const char *luser, const char *lpass) 379 { 380 char tmp[80]; 381 char *user, *pass, *acct, *p; 382 char emptypass[] = ""; 383 const char *errormsg; 384 int n, aflag, rval, nlen; 385 386 aflag = rval = 0; 387 user = pass = acct = NULL; 388 if (luser) 389 user = ftp_strdup(luser); 390 if (lpass) 391 pass = ftp_strdup(lpass); 392 393 DPRINTF("ftp_login: user `%s' pass `%s' host `%s'\n", 394 STRorNULL(user), STRorNULL(pass), STRorNULL(host)); 395 396 /* 397 * Set up arguments for an anonymous FTP session, if necessary. 398 */ 399 if (anonftp) { 400 FREEPTR(user); 401 user = ftp_strdup("anonymous"); /* as per RFC1635 */ 402 FREEPTR(pass); 403 pass = ftp_strdup(getoptionvalue("anonpass")); 404 } 405 406 if (ruserpass(host, &user, &pass, &acct) < 0) { 407 code = -1; 408 goto cleanup_ftp_login; 409 } 410 411 while (user == NULL) { 412 if (localname) 413 fprintf(ttyout, "Name (%s:%s): ", host, localname); 414 else 415 fprintf(ttyout, "Name (%s): ", host); 416 errormsg = NULL; 417 nlen = getline(stdin, tmp, sizeof(tmp), &errormsg); 418 if (nlen < 0) { 419 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "login"); 420 code = -1; 421 goto cleanup_ftp_login; 422 } else if (nlen == 0) { 423 user = ftp_strdup(localname); 424 } else { 425 user = ftp_strdup(tmp); 426 } 427 } 428 429 if (gatemode) { 430 char *nuser; 431 size_t len; 432 433 len = strlen(user) + 1 + strlen(host) + 1; 434 nuser = ftp_malloc(len); 435 (void)strlcpy(nuser, user, len); 436 (void)strlcat(nuser, "@", len); 437 (void)strlcat(nuser, host, len); 438 FREEPTR(user); 439 user = nuser; 440 } 441 442 n = command("USER %s", user); 443 if (n == CONTINUE) { 444 if (pass == NULL) { 445 p = getpass("Password: "); 446 if (p == NULL) 447 p = emptypass; 448 pass = ftp_strdup(p); 449 memset(p, 0, strlen(p)); 450 } 451 n = command("PASS %s", pass); 452 memset(pass, 0, strlen(pass)); 453 } 454 if (n == CONTINUE) { 455 aflag++; 456 if (acct == NULL) { 457 p = getpass("Account: "); 458 if (p == NULL) 459 p = emptypass; 460 acct = ftp_strdup(p); 461 memset(p, 0, strlen(p)); 462 } 463 if (acct[0] == '\0') { 464 warnx("Login failed"); 465 goto cleanup_ftp_login; 466 } 467 n = command("ACCT %s", acct); 468 memset(acct, 0, strlen(acct)); 469 } 470 if ((n != COMPLETE) || 471 (!aflag && acct != NULL && command("ACCT %s", acct) != COMPLETE)) { 472 warnx("Login failed"); 473 goto cleanup_ftp_login; 474 } 475 rval = 1; 476 username = ftp_strdup(user); 477 if (proxy) 478 goto cleanup_ftp_login; 479 480 connected = -1; 481 getremoteinfo(); 482 for (n = 0; n < macnum; ++n) { 483 if (!strcmp("init", macros[n].mac_name)) { 484 (void)strlcpy(line, "$init", sizeof(line)); 485 makeargv(); 486 domacro(margc, margv); 487 break; 488 } 489 } 490 updatelocalcwd(); 491 updateremotecwd(); 492 493 cleanup_ftp_login: 494 FREEPTR(user); 495 if (pass != NULL) 496 memset(pass, 0, strlen(pass)); 497 FREEPTR(pass); 498 if (acct != NULL) 499 memset(acct, 0, strlen(acct)); 500 FREEPTR(acct); 501 return (rval); 502 } 503 504 /* 505 * `another' gets another argument, and stores the new argc and argv. 506 * It reverts to the top level (via intr()) on EOF/error. 507 * 508 * Returns false if no new arguments have been added. 509 */ 510 int 511 another(int *pargc, char ***pargv, const char *prompt) 512 { 513 const char *errormsg; 514 int ret, nlen; 515 size_t len; 516 517 len = strlen(line); 518 if (len >= sizeof(line) - 3) { 519 fputs("Sorry, arguments too long.\n", ttyout); 520 intr(0); 521 } 522 fprintf(ttyout, "(%s) ", prompt); 523 line[len++] = ' '; 524 errormsg = NULL; 525 nlen = getline(stdin, line + len, sizeof(line)-len, &errormsg); 526 if (nlen < 0) { 527 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "operation"); 528 intr(0); 529 } 530 len += nlen; 531 makeargv(); 532 ret = margc > *pargc; 533 *pargc = margc; 534 *pargv = margv; 535 return (ret); 536 } 537 538 /* 539 * glob files given in argv[] from the remote server. 540 * if errbuf isn't NULL, store error messages there instead 541 * of writing to the screen. 542 */ 543 char * 544 remglob(char *argv[], int doswitch, const char **errbuf) 545 { 546 static char buf[MAXPATHLEN]; 547 static FILE *ftemp = NULL; 548 static char **args; 549 char temp[MAXPATHLEN]; 550 int oldverbose, oldhash, oldprogress, fd; 551 char *cp; 552 const char *mode; 553 size_t len; 554 555 if (!mflag || !connected) { 556 if (!doglob) 557 args = NULL; 558 else { 559 if (ftemp) { 560 (void)fclose(ftemp); 561 ftemp = NULL; 562 } 563 } 564 return (NULL); 565 } 566 if (!doglob) { 567 if (args == NULL) 568 args = argv; 569 if ((cp = *++args) == NULL) 570 args = NULL; 571 return (cp); 572 } 573 if (ftemp == NULL) { 574 len = strlcpy(temp, tmpdir, sizeof(temp)); 575 if (temp[len - 1] != '/') 576 (void)strlcat(temp, "/", sizeof(temp)); 577 (void)strlcat(temp, TMPFILE, sizeof(temp)); 578 if ((fd = mkstemp(temp)) < 0) { 579 warn("Unable to create temporary file `%s'", temp); 580 return (NULL); 581 } 582 close(fd); 583 oldverbose = verbose; 584 verbose = (errbuf != NULL) ? -1 : 0; 585 oldhash = hash; 586 oldprogress = progress; 587 hash = 0; 588 progress = 0; 589 if (doswitch) 590 pswitch(!proxy); 591 for (mode = "w"; *++argv != NULL; mode = "a") 592 recvrequest("NLST", temp, *argv, mode, 0, 0); 593 if ((code / 100) != COMPLETE) { 594 if (errbuf != NULL) 595 *errbuf = reply_string; 596 } 597 if (doswitch) 598 pswitch(!proxy); 599 verbose = oldverbose; 600 hash = oldhash; 601 progress = oldprogress; 602 ftemp = fopen(temp, "r"); 603 (void)unlink(temp); 604 if (ftemp == NULL) { 605 if (errbuf == NULL) 606 warnx("Can't find list of remote files"); 607 else 608 *errbuf = 609 "Can't find list of remote files"; 610 return (NULL); 611 } 612 } 613 if (fgets(buf, sizeof(buf), ftemp) == NULL) { 614 (void)fclose(ftemp); 615 ftemp = NULL; 616 return (NULL); 617 } 618 if ((cp = strchr(buf, '\n')) != NULL) 619 *cp = '\0'; 620 return (buf); 621 } 622 623 /* 624 * Glob a local file name specification with the expectation of a single 625 * return value. Can't control multiple values being expanded from the 626 * expression, we return only the first. 627 * Returns NULL on error, or a pointer to a buffer containing the filename 628 * that's the caller's responsiblity to free(3) when finished with. 629 */ 630 char * 631 globulize(const char *pattern) 632 { 633 glob_t gl; 634 int flags; 635 char *p; 636 637 if (!doglob) 638 return (ftp_strdup(pattern)); 639 640 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 641 memset(&gl, 0, sizeof(gl)); 642 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) { 643 warnx("Glob pattern `%s' not found", pattern); 644 globfree(&gl); 645 return (NULL); 646 } 647 p = ftp_strdup(gl.gl_pathv[0]); 648 globfree(&gl); 649 return (p); 650 } 651 652 /* 653 * determine size of remote file 654 */ 655 off_t 656 remotesize(const char *file, int noisy) 657 { 658 int overbose, r; 659 off_t size; 660 661 overbose = verbose; 662 size = -1; 663 if (ftp_debug == 0) 664 verbose = -1; 665 if (! features[FEAT_SIZE]) { 666 if (noisy) 667 fprintf(ttyout, 668 "SIZE is not supported by remote server.\n"); 669 goto cleanup_remotesize; 670 } 671 r = command("SIZE %s", file); 672 if (r == COMPLETE) { 673 char *cp, *ep; 674 675 cp = strchr(reply_string, ' '); 676 if (cp != NULL) { 677 cp++; 678 size = STRTOLL(cp, &ep, 10); 679 if (*ep != '\0' && !isspace((unsigned char)*ep)) 680 size = -1; 681 } 682 } else { 683 if (r == ERROR && code == 500 && features[FEAT_SIZE] == -1) 684 features[FEAT_SIZE] = 0; 685 if (noisy && ftp_debug == 0) { 686 fputs(reply_string, ttyout); 687 putc('\n', ttyout); 688 } 689 } 690 cleanup_remotesize: 691 verbose = overbose; 692 return (size); 693 } 694 695 /* 696 * determine last modification time (in GMT) of remote file 697 */ 698 time_t 699 remotemodtime(const char *file, int noisy) 700 { 701 int overbose, ocode, r; 702 time_t rtime; 703 704 overbose = verbose; 705 ocode = code; 706 rtime = -1; 707 if (ftp_debug == 0) 708 verbose = -1; 709 if (! features[FEAT_MDTM]) { 710 if (noisy) 711 fprintf(ttyout, 712 "MDTM is not supported by remote server.\n"); 713 goto cleanup_parse_time; 714 } 715 r = command("MDTM %s", file); 716 if (r == COMPLETE) { 717 struct tm timebuf; 718 char *timestr, *frac; 719 720 /* 721 * time-val = 14DIGIT [ "." 1*DIGIT ] 722 * YYYYMMDDHHMMSS[.sss] 723 * mdtm-response = "213" SP time-val CRLF / error-response 724 */ 725 timestr = reply_string + 4; 726 727 /* 728 * parse fraction. 729 * XXX: ignored for now 730 */ 731 frac = strchr(timestr, '\r'); 732 if (frac != NULL) 733 *frac = '\0'; 734 frac = strchr(timestr, '.'); 735 if (frac != NULL) 736 *frac++ = '\0'; 737 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) { 738 /* 739 * XXX: Workaround for lame ftpd's that return 740 * `19100' instead of `2000' 741 */ 742 fprintf(ttyout, 743 "Y2K warning! Incorrect time-val `%s' received from server.\n", 744 timestr); 745 timestr++; 746 timestr[0] = '2'; 747 timestr[1] = '0'; 748 fprintf(ttyout, "Converted to `%s'\n", timestr); 749 } 750 memset(&timebuf, 0, sizeof(timebuf)); 751 if (strlen(timestr) != 14 || 752 (strptime(timestr, "%Y%m%d%H%M%S", &timebuf) == NULL)) { 753 bad_parse_time: 754 fprintf(ttyout, "Can't parse time `%s'.\n", timestr); 755 goto cleanup_parse_time; 756 } 757 timebuf.tm_isdst = -1; 758 rtime = timegm(&timebuf); 759 if (rtime == -1) { 760 if (noisy || ftp_debug != 0) 761 goto bad_parse_time; 762 else 763 goto cleanup_parse_time; 764 } else 765 DPRINTF("remotemodtime: parsed date `%s' as " LLF 766 ", %s", 767 timestr, (LLT)rtime, 768 rfc2822time(localtime(&rtime))); 769 } else { 770 if (r == ERROR && code == 500 && features[FEAT_MDTM] == -1) 771 features[FEAT_MDTM] = 0; 772 if (noisy && ftp_debug == 0) { 773 fputs(reply_string, ttyout); 774 putc('\n', ttyout); 775 } 776 } 777 cleanup_parse_time: 778 verbose = overbose; 779 if (rtime == -1) 780 code = ocode; 781 return (rtime); 782 } 783 784 /* 785 * Format tm in an RFC2822 compatible manner, with a trailing \n. 786 * Returns a pointer to a static string containing the result. 787 */ 788 const char * 789 rfc2822time(const struct tm *tm) 790 { 791 static char result[50]; 792 793 if (strftime(result, sizeof(result), 794 "%a, %d %b %Y %H:%M:%S %z\n", tm) == 0) 795 errx(1, "Can't convert RFC2822 time: buffer too small"); 796 return result; 797 } 798 799 /* 800 * Update global `localcwd', which contains the state of the local cwd 801 */ 802 void 803 updatelocalcwd(void) 804 { 805 806 if (getcwd(localcwd, sizeof(localcwd)) == NULL) 807 localcwd[0] = '\0'; 808 DPRINTF("updatelocalcwd: got `%s'\n", localcwd); 809 } 810 811 /* 812 * Update global `remotecwd', which contains the state of the remote cwd 813 */ 814 void 815 updateremotecwd(void) 816 { 817 int overbose, ocode, i; 818 char *cp; 819 820 overbose = verbose; 821 ocode = code; 822 if (ftp_debug == 0) 823 verbose = -1; 824 if (command("PWD") != COMPLETE) 825 goto badremotecwd; 826 cp = strchr(reply_string, ' '); 827 if (cp == NULL || cp[0] == '\0' || cp[1] != '"') 828 goto badremotecwd; 829 cp += 2; 830 for (i = 0; *cp && i < sizeof(remotecwd) - 1; i++, cp++) { 831 if (cp[0] == '"') { 832 if (cp[1] == '"') 833 cp++; 834 else 835 break; 836 } 837 remotecwd[i] = *cp; 838 } 839 remotecwd[i] = '\0'; 840 DPRINTF("updateremotecwd: got `%s'\n", remotecwd); 841 goto cleanupremotecwd; 842 badremotecwd: 843 remotecwd[0]='\0'; 844 cleanupremotecwd: 845 verbose = overbose; 846 code = ocode; 847 } 848 849 /* 850 * Ensure file is in or under dir. 851 * Returns 1 if so, 0 if not (or an error occurred). 852 */ 853 int 854 fileindir(const char *file, const char *dir) 855 { 856 char parentdirbuf[PATH_MAX+1], *parentdir; 857 char realdir[PATH_MAX+1]; 858 size_t dirlen; 859 860 /* determine parent directory of file */ 861 (void)strlcpy(parentdirbuf, file, sizeof(parentdirbuf)); 862 parentdir = dirname(parentdirbuf); 863 if (strcmp(parentdir, ".") == 0) 864 return 1; /* current directory is ok */ 865 866 /* find the directory */ 867 if (realpath(parentdir, realdir) == NULL) { 868 warn("Unable to determine real path of `%s'", parentdir); 869 return 0; 870 } 871 if (realdir[0] != '/') /* relative result is ok */ 872 return 1; 873 dirlen = strlen(dir); 874 if (strncmp(realdir, dir, dirlen) == 0 && 875 (realdir[dirlen] == '/' || realdir[dirlen] == '\0')) 876 return 1; 877 return 0; 878 } 879 880 /* 881 * List words in stringlist, vertically arranged 882 */ 883 void 884 list_vertical(StringList *sl) 885 { 886 int i, j; 887 int columns, lines; 888 char *p; 889 size_t w, width; 890 891 width = 0; 892 893 for (i = 0 ; i < sl->sl_cur ; i++) { 894 w = strlen(sl->sl_str[i]); 895 if (w > width) 896 width = w; 897 } 898 width = (width + 8) &~ 7; 899 900 columns = ttywidth / width; 901 if (columns == 0) 902 columns = 1; 903 lines = (sl->sl_cur + columns - 1) / columns; 904 for (i = 0; i < lines; i++) { 905 for (j = 0; j < columns; j++) { 906 p = sl->sl_str[j * lines + i]; 907 if (p) 908 fputs(p, ttyout); 909 if (j * lines + i + lines >= sl->sl_cur) { 910 putc('\n', ttyout); 911 break; 912 } 913 if (p) { 914 w = strlen(p); 915 while (w < width) { 916 w = (w + 8) &~ 7; 917 (void)putc('\t', ttyout); 918 } 919 } 920 } 921 } 922 } 923 924 /* 925 * Update the global ttywidth value, using TIOCGWINSZ. 926 */ 927 void 928 setttywidth(int a) 929 { 930 struct winsize winsize; 931 int oerrno = errno; 932 933 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 && 934 winsize.ws_col != 0) 935 ttywidth = winsize.ws_col; 936 else 937 ttywidth = 80; 938 errno = oerrno; 939 } 940 941 /* 942 * Change the rate limit up (SIGUSR1) or down (SIGUSR2) 943 */ 944 void 945 crankrate(int sig) 946 { 947 948 switch (sig) { 949 case SIGUSR1: 950 if (rate_get) 951 rate_get += rate_get_incr; 952 if (rate_put) 953 rate_put += rate_put_incr; 954 break; 955 case SIGUSR2: 956 if (rate_get && rate_get > rate_get_incr) 957 rate_get -= rate_get_incr; 958 if (rate_put && rate_put > rate_put_incr) 959 rate_put -= rate_put_incr; 960 break; 961 default: 962 err(1, "crankrate invoked with unknown signal: %d", sig); 963 } 964 } 965 966 967 /* 968 * Setup or cleanup EditLine structures 969 */ 970 #ifndef NO_EDITCOMPLETE 971 void 972 controlediting(void) 973 { 974 if (editing && el == NULL && hist == NULL) { 975 HistEvent ev; 976 int editmode; 977 978 el = el_init(getprogname(), stdin, ttyout, stderr); 979 /* init editline */ 980 hist = history_init(); /* init the builtin history */ 981 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */ 982 el_set(el, EL_HIST, history, hist); /* use history */ 983 984 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */ 985 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */ 986 el_set(el, EL_RPROMPT, rprompt); 987 988 /* add local file completion, bind to TAB */ 989 el_set(el, EL_ADDFN, "ftp-complete", 990 "Context sensitive argument completion", 991 complete); 992 el_set(el, EL_BIND, "^I", "ftp-complete", NULL); 993 el_source(el, NULL); /* read ~/.editrc */ 994 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0) 995 editing = 0; /* the user doesn't want editing, 996 * so disable, and let statement 997 * below cleanup */ 998 else 999 el_set(el, EL_SIGNAL, 1); 1000 } 1001 if (!editing) { 1002 if (hist) { 1003 history_end(hist); 1004 hist = NULL; 1005 } 1006 if (el) { 1007 el_end(el); 1008 el = NULL; 1009 } 1010 } 1011 } 1012 #endif /* !NO_EDITCOMPLETE */ 1013 1014 /* 1015 * Convert the string `arg' to an int, which may have an optional SI suffix 1016 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise. 1017 */ 1018 int 1019 strsuftoi(const char *arg) 1020 { 1021 char *cp; 1022 long val; 1023 1024 if (!isdigit((unsigned char)arg[0])) 1025 return (-1); 1026 1027 val = strtol(arg, &cp, 10); 1028 if (cp != NULL) { 1029 if (cp[0] != '\0' && cp[1] != '\0') 1030 return (-1); 1031 switch (tolower((unsigned char)cp[0])) { 1032 case '\0': 1033 case 'b': 1034 break; 1035 case 'k': 1036 val <<= 10; 1037 break; 1038 case 'm': 1039 val <<= 20; 1040 break; 1041 case 'g': 1042 val <<= 30; 1043 break; 1044 default: 1045 return (-1); 1046 } 1047 } 1048 if (val < 0 || val > INT_MAX) 1049 return (-1); 1050 1051 return (val); 1052 } 1053 1054 /* 1055 * Set up socket buffer sizes before a connection is made. 1056 */ 1057 void 1058 setupsockbufsize(int sock) 1059 { 1060 1061 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, 1062 (void *)&sndbuf_size, sizeof(sndbuf_size)) == -1) 1063 warn("Unable to set sndbuf size %d", sndbuf_size); 1064 1065 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, 1066 (void *)&rcvbuf_size, sizeof(rcvbuf_size)) == -1) 1067 warn("Unable to set rcvbuf size %d", rcvbuf_size); 1068 } 1069 1070 /* 1071 * Copy characters from src into dst, \ quoting characters that require it 1072 */ 1073 void 1074 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen) 1075 { 1076 int di, si; 1077 1078 for (di = si = 0; 1079 src[si] != '\0' && di < dstlen && si < srclen; 1080 di++, si++) { 1081 switch (src[si]) { 1082 case '\\': 1083 case ' ': 1084 case '\t': 1085 case '\r': 1086 case '\n': 1087 case '"': 1088 dst[di++] = '\\'; 1089 if (di >= dstlen) 1090 break; 1091 /* FALLTHROUGH */ 1092 default: 1093 dst[di] = src[si]; 1094 } 1095 } 1096 dst[di] = '\0'; 1097 } 1098 1099 /* 1100 * Copy src into buf (which is len bytes long), expanding % sequences. 1101 */ 1102 void 1103 formatbuf(char *buf, size_t len, const char *src) 1104 { 1105 const char *p, *p2, *q; 1106 int i, op, updirs, pdirs; 1107 1108 #define ADDBUF(x) do { \ 1109 if (i >= len - 1) \ 1110 goto endbuf; \ 1111 buf[i++] = (x); \ 1112 } while (0) 1113 1114 p = src; 1115 for (i = 0; *p; p++) { 1116 if (*p != '%') { 1117 ADDBUF(*p); 1118 continue; 1119 } 1120 p++; 1121 1122 switch (op = *p) { 1123 1124 case '/': 1125 case '.': 1126 case 'c': 1127 p2 = connected ? remotecwd : ""; 1128 updirs = pdirs = 0; 1129 1130 /* option to determine fixed # of dirs from path */ 1131 if (op == '.' || op == 'c') { 1132 int skip; 1133 1134 q = p2; 1135 while (*p2) /* calc # of /'s */ 1136 if (*p2++ == '/') 1137 updirs++; 1138 if (p[1] == '0') { /* print <x> or ... */ 1139 pdirs = 1; 1140 p++; 1141 } 1142 if (p[1] >= '1' && p[1] <= '9') { 1143 /* calc # to skip */ 1144 skip = p[1] - '0'; 1145 p++; 1146 } else 1147 skip = 1; 1148 1149 updirs -= skip; 1150 while (skip-- > 0) { 1151 while ((p2 > q) && (*p2 != '/')) 1152 p2--; /* back up */ 1153 if (skip && p2 > q) 1154 p2--; 1155 } 1156 if (*p2 == '/' && p2 != q) 1157 p2++; 1158 } 1159 1160 if (updirs > 0 && pdirs) { 1161 if (i >= len - 5) 1162 break; 1163 if (op == '.') { 1164 ADDBUF('.'); 1165 ADDBUF('.'); 1166 ADDBUF('.'); 1167 } else { 1168 ADDBUF('/'); 1169 ADDBUF('<'); 1170 if (updirs > 9) { 1171 ADDBUF('9'); 1172 ADDBUF('+'); 1173 } else 1174 ADDBUF('0' + updirs); 1175 ADDBUF('>'); 1176 } 1177 } 1178 for (; *p2; p2++) 1179 ADDBUF(*p2); 1180 break; 1181 1182 case 'M': 1183 case 'm': 1184 for (p2 = connected && hostname ? hostname : "-"; 1185 *p2 ; p2++) { 1186 if (op == 'm' && *p2 == '.') 1187 break; 1188 ADDBUF(*p2); 1189 } 1190 break; 1191 1192 case 'n': 1193 for (p2 = connected ? username : "-"; *p2 ; p2++) 1194 ADDBUF(*p2); 1195 break; 1196 1197 case '%': 1198 ADDBUF('%'); 1199 break; 1200 1201 default: /* display unknown codes literally */ 1202 ADDBUF('%'); 1203 ADDBUF(op); 1204 break; 1205 1206 } 1207 } 1208 endbuf: 1209 buf[i] = '\0'; 1210 } 1211 1212 /* 1213 * Determine if given string is an IPv6 address or not. 1214 * Return 1 for yes, 0 for no 1215 */ 1216 int 1217 isipv6addr(const char *addr) 1218 { 1219 int rv = 0; 1220 #ifdef INET6 1221 struct addrinfo hints, *res; 1222 1223 memset(&hints, 0, sizeof(hints)); 1224 hints.ai_family = PF_INET6; 1225 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1226 hints.ai_flags = AI_NUMERICHOST; 1227 if (getaddrinfo(addr, "0", &hints, &res) != 0) 1228 rv = 0; 1229 else { 1230 rv = 1; 1231 freeaddrinfo(res); 1232 } 1233 DPRINTF("isipv6addr: got %d for %s\n", rv, addr); 1234 #endif 1235 return (rv == 1) ? 1 : 0; 1236 } 1237 1238 /* 1239 * Read a line from the FILE stream into buf/buflen using fgets(), so up 1240 * to buflen-1 chars will be read and the result will be NUL terminated. 1241 * If the line has a trailing newline it will be removed. 1242 * If the line is too long, excess characters will be read until 1243 * newline/EOF/error. 1244 * If EOF/error occurs or a too-long line is encountered and errormsg 1245 * isn't NULL, it will be changed to a description of the problem. 1246 * (The EOF message has a leading \n for cosmetic purposes). 1247 * Returns: 1248 * >=0 length of line (excluding trailing newline) if all ok 1249 * -1 error occurred 1250 * -2 EOF encountered 1251 * -3 line was too long 1252 */ 1253 int 1254 getline(FILE *stream, char *buf, size_t buflen, const char **errormsg) 1255 { 1256 int rv, ch; 1257 size_t len; 1258 1259 if (fgets(buf, buflen, stream) == NULL) { 1260 if (feof(stream)) { /* EOF */ 1261 rv = -2; 1262 if (errormsg) 1263 *errormsg = "\nEOF received"; 1264 } else { /* error */ 1265 rv = -1; 1266 if (errormsg) 1267 *errormsg = "Error encountered"; 1268 } 1269 clearerr(stream); 1270 return rv; 1271 } 1272 len = strlen(buf); 1273 if (buf[len-1] == '\n') { /* clear any trailing newline */ 1274 buf[--len] = '\0'; 1275 } else if (len == buflen-1) { /* line too long */ 1276 while ((ch = getchar()) != '\n' && ch != EOF) 1277 continue; 1278 if (errormsg) 1279 *errormsg = "Input line is too long"; 1280 clearerr(stream); 1281 return -3; 1282 } 1283 if (errormsg) 1284 *errormsg = NULL; 1285 return len; 1286 } 1287 1288 /* 1289 * Internal version of connect(2); sets socket buffer sizes, 1290 * binds to a specific local address (if set), and 1291 * supports a connection timeout using a non-blocking connect(2) with 1292 * a poll(2). 1293 * Socket fcntl flags are temporarily updated to include O_NONBLOCK; 1294 * these will not be reverted on connection failure. 1295 * Returns 0 on success, or -1 upon failure (with an appropriate 1296 * error message displayed.) 1297 */ 1298 int 1299 ftp_connect(int sock, const struct sockaddr *name, socklen_t namelen) 1300 { 1301 int flags, rv, timeout, error; 1302 socklen_t slen; 1303 struct timeval endtime, now, td; 1304 struct pollfd pfd[1]; 1305 char hname[NI_MAXHOST]; 1306 char sname[NI_MAXSERV]; 1307 1308 setupsockbufsize(sock); 1309 if (getnameinfo(name, namelen, 1310 hname, sizeof(hname), sname, sizeof(sname), 1311 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 1312 strlcpy(hname, "?", sizeof(hname)); 1313 strlcpy(sname, "?", sizeof(sname)); 1314 } 1315 1316 if (bindai != NULL) { /* bind to specific addr */ 1317 struct addrinfo *ai; 1318 1319 for (ai = bindai; ai != NULL; ai = ai->ai_next) { 1320 if (ai->ai_family == name->sa_family) 1321 break; 1322 } 1323 if (ai == NULL) 1324 ai = bindai; 1325 if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) { 1326 char bname[NI_MAXHOST]; 1327 int saveerr; 1328 1329 saveerr = errno; 1330 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, 1331 bname, sizeof(bname), NULL, 0, NI_NUMERICHOST) != 0) 1332 strlcpy(bname, "?", sizeof(bname)); 1333 errno = saveerr; 1334 warn("Can't bind to `%s'", bname); 1335 return -1; 1336 } 1337 } 1338 1339 /* save current socket flags */ 1340 if ((flags = fcntl(sock, F_GETFL, 0)) == -1) { 1341 warn("Can't %s socket flags for connect to `%s:%s'", 1342 "save", hname, sname); 1343 return -1; 1344 } 1345 /* set non-blocking connect */ 1346 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) { 1347 warn("Can't set socket non-blocking for connect to `%s:%s'", 1348 hname, sname); 1349 return -1; 1350 } 1351 1352 /* NOTE: we now must restore socket flags on successful exit */ 1353 1354 pfd[0].fd = sock; 1355 pfd[0].events = POLLIN|POLLOUT; 1356 1357 if (quit_time > 0) { /* want a non default timeout */ 1358 (void)gettimeofday(&endtime, NULL); 1359 endtime.tv_sec += quit_time; /* determine end time */ 1360 } 1361 1362 rv = connect(sock, name, namelen); /* inititate the connection */ 1363 if (rv == -1) { /* connection error */ 1364 if (errno != EINPROGRESS) { /* error isn't "please wait" */ 1365 connecterror: 1366 warn("Can't connect to `%s:%s'", hname, sname); 1367 return -1; 1368 } 1369 1370 /* connect EINPROGRESS; wait */ 1371 do { 1372 if (quit_time > 0) { /* determine timeout */ 1373 (void)gettimeofday(&now, NULL); 1374 timersub(&endtime, &now, &td); 1375 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1376 if (timeout < 0) 1377 timeout = 0; 1378 } else { 1379 timeout = INFTIM; 1380 } 1381 pfd[0].revents = 0; 1382 rv = ftp_poll(pfd, 1, timeout); 1383 /* loop until poll ! EINTR */ 1384 } while (rv == -1 && errno == EINTR); 1385 1386 if (rv == 0) { /* poll (connect) timed out */ 1387 errno = ETIMEDOUT; 1388 goto connecterror; 1389 } 1390 1391 if (rv == -1) { /* poll error */ 1392 goto connecterror; 1393 } else if (pfd[0].revents & (POLLIN|POLLOUT)) { 1394 slen = sizeof(error); /* OK, or pending error */ 1395 if (getsockopt(sock, SOL_SOCKET, SO_ERROR, 1396 &error, &slen) == -1) { 1397 /* Solaris pending error */ 1398 goto connecterror; 1399 } else if (error != 0) { 1400 errno = error; /* BSD pending error */ 1401 goto connecterror; 1402 } 1403 } else { 1404 errno = EBADF; /* this shouldn't happen ... */ 1405 goto connecterror; 1406 } 1407 } 1408 1409 if (fcntl(sock, F_SETFL, flags) == -1) { 1410 /* restore socket flags */ 1411 warn("Can't %s socket flags for connect to `%s:%s'", 1412 "restore", hname, sname); 1413 return -1; 1414 } 1415 return 0; 1416 } 1417 1418 /* 1419 * Internal version of listen(2); sets socket buffer sizes first. 1420 */ 1421 int 1422 ftp_listen(int sock, int backlog) 1423 { 1424 1425 setupsockbufsize(sock); 1426 return (listen(sock, backlog)); 1427 } 1428 1429 /* 1430 * Internal version of poll(2), to allow reimplementation by select(2) 1431 * on platforms without the former. 1432 */ 1433 int 1434 ftp_poll(struct pollfd *fds, int nfds, int timeout) 1435 { 1436 return poll(fds, nfds, timeout); 1437 } 1438 1439 /* 1440 * malloc() with inbuilt error checking 1441 */ 1442 void * 1443 ftp_malloc(size_t size) 1444 { 1445 void *p; 1446 1447 p = malloc(size); 1448 if (p == NULL) 1449 err(1, "Unable to allocate %ld bytes of memory", (long)size); 1450 return (p); 1451 } 1452 1453 /* 1454 * sl_init() with inbuilt error checking 1455 */ 1456 StringList * 1457 ftp_sl_init(void) 1458 { 1459 StringList *p; 1460 1461 p = sl_init(); 1462 if (p == NULL) 1463 err(1, "Unable to allocate memory for stringlist"); 1464 return (p); 1465 } 1466 1467 /* 1468 * sl_add() with inbuilt error checking 1469 */ 1470 void 1471 ftp_sl_add(StringList *sl, char *i) 1472 { 1473 1474 if (sl_add(sl, i) == -1) 1475 err(1, "Unable to add `%s' to stringlist", i); 1476 } 1477 1478 /* 1479 * strdup() with inbuilt error checking 1480 */ 1481 char * 1482 ftp_strdup(const char *str) 1483 { 1484 char *s; 1485 1486 if (str == NULL) 1487 errx(1, "ftp_strdup: called with NULL argument"); 1488 s = strdup(str); 1489 if (s == NULL) 1490 err(1, "Unable to allocate memory for string copy"); 1491 return (s); 1492 } 1493