1 /* $NetBSD: util.c,v 1.150 2009/04/12 10:18:52 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Luke Mewburn. 9 * 10 * 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 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 /* 37 * Copyright (c) 1985, 1989, 1993, 1994 38 * The Regents of the University of California. All rights reserved. 39 * 40 * Redistribution and use in source and binary forms, with or without 41 * modification, are permitted provided that the following conditions 42 * are met: 43 * 1. Redistributions of source code must retain the above copyright 44 * notice, this list of conditions and the following disclaimer. 45 * 2. Redistributions in binary form must reproduce the above copyright 46 * notice, this list of conditions and the following disclaimer in the 47 * documentation and/or other materials provided with the distribution. 48 * 3. Neither the name of the University nor the names of its contributors 49 * may be used to endorse or promote products derived from this software 50 * without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 62 * SUCH DAMAGE. 63 */ 64 65 #include <sys/cdefs.h> 66 #ifndef lint 67 __RCSID("$NetBSD: util.c,v 1.150 2009/04/12 10:18:52 lukem Exp $"); 68 #endif /* not lint */ 69 70 /* 71 * FTP User Program -- Misc support routines 72 */ 73 #include <sys/param.h> 74 #include <sys/socket.h> 75 #include <sys/ioctl.h> 76 #include <sys/time.h> 77 #include <netinet/in.h> 78 #include <arpa/ftp.h> 79 80 #include <ctype.h> 81 #include <err.h> 82 #include <errno.h> 83 #include <fcntl.h> 84 #include <glob.h> 85 #include <signal.h> 86 #include <libgen.h> 87 #include <limits.h> 88 #include <netdb.h> 89 #include <stdio.h> 90 #include <stdlib.h> 91 #include <string.h> 92 #include <termios.h> 93 #include <time.h> 94 #include <tzfile.h> 95 #include <unistd.h> 96 97 #include "ftp_var.h" 98 99 /* 100 * Connect to peer server and auto-login, if possible. 101 */ 102 void 103 setpeer(int argc, char *argv[]) 104 { 105 char *host; 106 const char *port; 107 108 if (argc == 0) 109 goto usage; 110 if (connected) { 111 fprintf(ttyout, "Already connected to %s, use close first.\n", 112 hostname); 113 code = -1; 114 return; 115 } 116 if (argc < 2) 117 (void)another(&argc, &argv, "to"); 118 if (argc < 2 || argc > 3) { 119 usage: 120 UPRINTF("usage: %s host-name [port]\n", argv[0]); 121 code = -1; 122 return; 123 } 124 if (gatemode) 125 port = gateport; 126 else 127 port = ftpport; 128 if (argc > 2) 129 port = argv[2]; 130 131 if (gatemode) { 132 if (gateserver == NULL || *gateserver == '\0') 133 errx(1, "main: gateserver not defined"); 134 host = hookup(gateserver, port); 135 } else 136 host = hookup(argv[1], port); 137 138 if (host) { 139 if (gatemode && verbose) { 140 fprintf(ttyout, 141 "Connecting via pass-through server %s\n", 142 gateserver); 143 } 144 145 connected = 1; 146 /* 147 * Set up defaults for FTP. 148 */ 149 (void)strlcpy(typename, "ascii", sizeof(typename)); 150 type = TYPE_A; 151 curtype = TYPE_A; 152 (void)strlcpy(formname, "non-print", sizeof(formname)); 153 form = FORM_N; 154 (void)strlcpy(modename, "stream", sizeof(modename)); 155 mode = MODE_S; 156 (void)strlcpy(structname, "file", sizeof(structname)); 157 stru = STRU_F; 158 (void)strlcpy(bytename, "8", sizeof(bytename)); 159 bytesize = 8; 160 if (autologin) 161 (void)ftp_login(argv[1], NULL, NULL); 162 } 163 } 164 165 static void 166 parse_feat(const char *fline) 167 { 168 169 /* 170 * work-around broken ProFTPd servers that can't 171 * even obey RFC2389. 172 */ 173 while (*fline && isspace((int)*fline)) 174 fline++; 175 176 if (strcasecmp(fline, "MDTM") == 0) 177 features[FEAT_MDTM] = 1; 178 else if (strncasecmp(fline, "MLST", sizeof("MLST") - 1) == 0) { 179 features[FEAT_MLST] = 1; 180 } else if (strcasecmp(fline, "REST STREAM") == 0) 181 features[FEAT_REST_STREAM] = 1; 182 else if (strcasecmp(fline, "SIZE") == 0) 183 features[FEAT_SIZE] = 1; 184 else if (strcasecmp(fline, "TVFS") == 0) 185 features[FEAT_TVFS] = 1; 186 } 187 188 /* 189 * Determine the remote system type (SYST) and features (FEAT). 190 * Call after a successful login (i.e, connected = -1) 191 */ 192 void 193 getremoteinfo(void) 194 { 195 int overbose, i; 196 197 overbose = verbose; 198 if (ftp_debug == 0) 199 verbose = -1; 200 201 /* determine remote system type */ 202 if (command("SYST") == COMPLETE) { 203 if (overbose) { 204 char *cp, c; 205 206 c = 0; 207 cp = strchr(reply_string + 4, ' '); 208 if (cp == NULL) 209 cp = strchr(reply_string + 4, '\r'); 210 if (cp) { 211 if (cp[-1] == '.') 212 cp--; 213 c = *cp; 214 *cp = '\0'; 215 } 216 217 fprintf(ttyout, "Remote system type is %s.\n", 218 reply_string + 4); 219 if (cp) 220 *cp = c; 221 } 222 if (!strncmp(reply_string, "215 UNIX Type: L8", 17)) { 223 if (proxy) 224 unix_proxy = 1; 225 else 226 unix_server = 1; 227 /* 228 * Set type to 0 (not specified by user), 229 * meaning binary by default, but don't bother 230 * telling server. We can use binary 231 * for text files unless changed by the user. 232 */ 233 type = 0; 234 (void)strlcpy(typename, "binary", sizeof(typename)); 235 if (overbose) 236 fprintf(ttyout, 237 "Using %s mode to transfer files.\n", 238 typename); 239 } else { 240 if (proxy) 241 unix_proxy = 0; 242 else 243 unix_server = 0; 244 if (overbose && 245 !strncmp(reply_string, "215 TOPS20", 10)) 246 fputs( 247 "Remember to set tenex mode when transferring binary files from this machine.\n", 248 ttyout); 249 } 250 } 251 252 /* determine features (if any) */ 253 for (i = 0; i < FEAT_max; i++) 254 features[i] = -1; 255 reply_callback = parse_feat; 256 if (command("FEAT") == COMPLETE) { 257 for (i = 0; i < FEAT_max; i++) { 258 if (features[i] == -1) 259 features[i] = 0; 260 } 261 features[FEAT_FEAT] = 1; 262 } else 263 features[FEAT_FEAT] = 0; 264 #ifndef NO_DEBUG 265 if (ftp_debug) { 266 #define DEBUG_FEAT(x) fprintf(ttyout, "features[" #x "] = %d\n", features[(x)]) 267 DEBUG_FEAT(FEAT_FEAT); 268 DEBUG_FEAT(FEAT_MDTM); 269 DEBUG_FEAT(FEAT_MLST); 270 DEBUG_FEAT(FEAT_REST_STREAM); 271 DEBUG_FEAT(FEAT_SIZE); 272 DEBUG_FEAT(FEAT_TVFS); 273 #undef DEBUG_FEAT 274 } 275 #endif 276 reply_callback = NULL; 277 278 verbose = overbose; 279 } 280 281 /* 282 * Reset the various variables that indicate connection state back to 283 * disconnected settings. 284 * The caller is responsible for issuing any commands to the remote server 285 * to perform a clean shutdown before this is invoked. 286 */ 287 void 288 cleanuppeer(void) 289 { 290 291 if (cout) 292 (void)fclose(cout); 293 cout = NULL; 294 connected = 0; 295 unix_server = 0; 296 unix_proxy = 0; 297 /* 298 * determine if anonftp was specifically set with -a 299 * (1), or implicitly set by auto_fetch() (2). in the 300 * latter case, disable after the current xfer 301 */ 302 if (anonftp == 2) 303 anonftp = 0; 304 data = -1; 305 epsv4bad = 0; 306 epsv6bad = 0; 307 if (username) 308 free(username); 309 username = NULL; 310 if (!proxy) 311 macnum = 0; 312 } 313 314 /* 315 * Top-level signal handler for interrupted commands. 316 */ 317 void 318 intr(int signo) 319 { 320 321 sigint_raised = 1; 322 alarmtimer(0); 323 if (fromatty) 324 write(fileno(ttyout), "\n", 1); 325 siglongjmp(toplevel, 1); 326 } 327 328 /* 329 * Signal handler for lost connections; cleanup various elements of 330 * the connection state, and call cleanuppeer() to finish it off. 331 */ 332 void 333 lostpeer(int dummy) 334 { 335 int oerrno = errno; 336 337 alarmtimer(0); 338 if (connected) { 339 if (cout != NULL) { 340 (void)shutdown(fileno(cout), 1+1); 341 (void)fclose(cout); 342 cout = NULL; 343 } 344 if (data >= 0) { 345 (void)shutdown(data, 1+1); 346 (void)close(data); 347 data = -1; 348 } 349 connected = 0; 350 } 351 pswitch(1); 352 if (connected) { 353 if (cout != NULL) { 354 (void)shutdown(fileno(cout), 1+1); 355 (void)fclose(cout); 356 cout = NULL; 357 } 358 connected = 0; 359 } 360 proxflag = 0; 361 pswitch(0); 362 cleanuppeer(); 363 errno = oerrno; 364 } 365 366 367 /* 368 * Login to remote host, using given username & password if supplied. 369 * Return non-zero if successful. 370 */ 371 int 372 ftp_login(const char *host, const char *luser, const char *lpass) 373 { 374 char tmp[80]; 375 char *fuser, *pass, *facct, *p; 376 char emptypass[] = ""; 377 const char *errormsg; 378 int n, aflag, rval, nlen; 379 380 aflag = rval = 0; 381 fuser = pass = facct = NULL; 382 if (luser) 383 fuser = ftp_strdup(luser); 384 if (lpass) 385 pass = ftp_strdup(lpass); 386 387 DPRINTF("ftp_login: user `%s' pass `%s' host `%s'\n", 388 STRorNULL(fuser), STRorNULL(pass), STRorNULL(host)); 389 390 /* 391 * Set up arguments for an anonymous FTP session, if necessary. 392 */ 393 if (anonftp) { 394 FREEPTR(fuser); 395 fuser = ftp_strdup("anonymous"); /* as per RFC1635 */ 396 FREEPTR(pass); 397 pass = ftp_strdup(getoptionvalue("anonpass")); 398 } 399 400 if (ruserpass(host, &fuser, &pass, &facct) < 0) { 401 code = -1; 402 goto cleanup_ftp_login; 403 } 404 405 while (fuser == NULL) { 406 if (localname) 407 fprintf(ttyout, "Name (%s:%s): ", host, localname); 408 else 409 fprintf(ttyout, "Name (%s): ", host); 410 errormsg = NULL; 411 nlen = getline(stdin, tmp, sizeof(tmp), &errormsg); 412 if (nlen < 0) { 413 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "login"); 414 code = -1; 415 goto cleanup_ftp_login; 416 } else if (nlen == 0) { 417 fuser = ftp_strdup(localname); 418 } else { 419 fuser = ftp_strdup(tmp); 420 } 421 } 422 423 if (gatemode) { 424 char *nuser; 425 size_t len; 426 427 len = strlen(fuser) + 1 + strlen(host) + 1; 428 nuser = ftp_malloc(len); 429 (void)strlcpy(nuser, fuser, len); 430 (void)strlcat(nuser, "@", len); 431 (void)strlcat(nuser, host, len); 432 FREEPTR(fuser); 433 fuser = nuser; 434 } 435 436 n = command("USER %s", fuser); 437 if (n == CONTINUE) { 438 if (pass == NULL) { 439 p = getpass("Password: "); 440 if (p == NULL) 441 p = emptypass; 442 pass = ftp_strdup(p); 443 memset(p, 0, strlen(p)); 444 } 445 n = command("PASS %s", pass); 446 memset(pass, 0, strlen(pass)); 447 } 448 if (n == CONTINUE) { 449 aflag++; 450 if (facct == NULL) { 451 p = getpass("Account: "); 452 if (p == NULL) 453 p = emptypass; 454 facct = ftp_strdup(p); 455 memset(p, 0, strlen(p)); 456 } 457 if (facct[0] == '\0') { 458 warnx("Login failed"); 459 goto cleanup_ftp_login; 460 } 461 n = command("ACCT %s", facct); 462 memset(facct, 0, strlen(facct)); 463 } 464 if ((n != COMPLETE) || 465 (!aflag && facct != NULL && command("ACCT %s", facct) != COMPLETE)) { 466 warnx("Login failed"); 467 goto cleanup_ftp_login; 468 } 469 rval = 1; 470 username = ftp_strdup(fuser); 471 if (proxy) 472 goto cleanup_ftp_login; 473 474 connected = -1; 475 getremoteinfo(); 476 for (n = 0; n < macnum; ++n) { 477 if (!strcmp("init", macros[n].mac_name)) { 478 (void)strlcpy(line, "$init", sizeof(line)); 479 makeargv(); 480 domacro(margc, margv); 481 break; 482 } 483 } 484 updatelocalcwd(); 485 updateremotecwd(); 486 487 cleanup_ftp_login: 488 FREEPTR(fuser); 489 if (pass != NULL) 490 memset(pass, 0, strlen(pass)); 491 FREEPTR(pass); 492 if (facct != NULL) 493 memset(facct, 0, strlen(facct)); 494 FREEPTR(facct); 495 return (rval); 496 } 497 498 /* 499 * `another' gets another argument, and stores the new argc and argv. 500 * It reverts to the top level (via intr()) on EOF/error. 501 * 502 * Returns false if no new arguments have been added. 503 */ 504 int 505 another(int *pargc, char ***pargv, const char *aprompt) 506 { 507 const char *errormsg; 508 int ret, nlen; 509 size_t len; 510 511 len = strlen(line); 512 if (len >= sizeof(line) - 3) { 513 fputs("Sorry, arguments too long.\n", ttyout); 514 intr(0); 515 } 516 fprintf(ttyout, "(%s) ", aprompt); 517 line[len++] = ' '; 518 errormsg = NULL; 519 nlen = getline(stdin, line + len, sizeof(line)-len, &errormsg); 520 if (nlen < 0) { 521 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "operation"); 522 intr(0); 523 } 524 len += nlen; 525 makeargv(); 526 ret = margc > *pargc; 527 *pargc = margc; 528 *pargv = margv; 529 return (ret); 530 } 531 532 /* 533 * glob files given in argv[] from the remote server. 534 * if errbuf isn't NULL, store error messages there instead 535 * of writing to the screen. 536 */ 537 char * 538 remglob(char *argv[], int doswitch, const char **errbuf) 539 { 540 static char buf[MAXPATHLEN]; 541 static FILE *ftemp = NULL; 542 static char **args; 543 char temp[MAXPATHLEN]; 544 int oldverbose, oldhash, oldprogress, fd; 545 char *cp; 546 const char *rmode; 547 size_t len; 548 549 if (!mflag || !connected) { 550 if (!doglob) 551 args = NULL; 552 else { 553 if (ftemp) { 554 (void)fclose(ftemp); 555 ftemp = NULL; 556 } 557 } 558 return (NULL); 559 } 560 if (!doglob) { 561 if (args == NULL) 562 args = argv; 563 if ((cp = *++args) == NULL) 564 args = NULL; 565 return (cp); 566 } 567 if (ftemp == NULL) { 568 len = strlcpy(temp, tmpdir, sizeof(temp)); 569 if (temp[len - 1] != '/') 570 (void)strlcat(temp, "/", sizeof(temp)); 571 (void)strlcat(temp, TMPFILE, sizeof(temp)); 572 if ((fd = mkstemp(temp)) < 0) { 573 warn("Unable to create temporary file `%s'", temp); 574 return (NULL); 575 } 576 close(fd); 577 oldverbose = verbose; 578 verbose = (errbuf != NULL) ? -1 : 0; 579 oldhash = hash; 580 oldprogress = progress; 581 hash = 0; 582 progress = 0; 583 if (doswitch) 584 pswitch(!proxy); 585 for (rmode = "w"; *++argv != NULL; rmode = "a") 586 recvrequest("NLST", temp, *argv, rmode, 0, 0); 587 if ((code / 100) != COMPLETE) { 588 if (errbuf != NULL) 589 *errbuf = reply_string; 590 } 591 if (doswitch) 592 pswitch(!proxy); 593 verbose = oldverbose; 594 hash = oldhash; 595 progress = oldprogress; 596 ftemp = fopen(temp, "r"); 597 (void)unlink(temp); 598 if (ftemp == NULL) { 599 if (errbuf == NULL) 600 warnx("Can't find list of remote files"); 601 else 602 *errbuf = 603 "Can't find list of remote files"; 604 return (NULL); 605 } 606 } 607 if (fgets(buf, sizeof(buf), ftemp) == NULL) { 608 (void)fclose(ftemp); 609 ftemp = NULL; 610 return (NULL); 611 } 612 if ((cp = strchr(buf, '\n')) != NULL) 613 *cp = '\0'; 614 return (buf); 615 } 616 617 /* 618 * Glob a local file name specification with the expectation of a single 619 * return value. Can't control multiple values being expanded from the 620 * expression, we return only the first. 621 * Returns NULL on error, or a pointer to a buffer containing the filename 622 * that's the caller's responsiblity to free(3) when finished with. 623 */ 624 char * 625 globulize(const char *pattern) 626 { 627 glob_t gl; 628 int flags; 629 char *p; 630 631 if (!doglob) 632 return (ftp_strdup(pattern)); 633 634 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 635 memset(&gl, 0, sizeof(gl)); 636 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) { 637 warnx("Glob pattern `%s' not found", pattern); 638 globfree(&gl); 639 return (NULL); 640 } 641 p = ftp_strdup(gl.gl_pathv[0]); 642 globfree(&gl); 643 return (p); 644 } 645 646 /* 647 * determine size of remote file 648 */ 649 off_t 650 remotesize(const char *file, int noisy) 651 { 652 int overbose, r; 653 off_t size; 654 655 overbose = verbose; 656 size = -1; 657 if (ftp_debug == 0) 658 verbose = -1; 659 if (! features[FEAT_SIZE]) { 660 if (noisy) 661 fprintf(ttyout, 662 "SIZE is not supported by remote server.\n"); 663 goto cleanup_remotesize; 664 } 665 r = command("SIZE %s", file); 666 if (r == COMPLETE) { 667 char *cp, *ep; 668 669 cp = strchr(reply_string, ' '); 670 if (cp != NULL) { 671 cp++; 672 size = STRTOLL(cp, &ep, 10); 673 if (*ep != '\0' && !isspace((unsigned char)*ep)) 674 size = -1; 675 } 676 } else { 677 if (r == ERROR && code == 500 && features[FEAT_SIZE] == -1) 678 features[FEAT_SIZE] = 0; 679 if (noisy && ftp_debug == 0) { 680 fputs(reply_string, ttyout); 681 putc('\n', ttyout); 682 } 683 } 684 cleanup_remotesize: 685 verbose = overbose; 686 return (size); 687 } 688 689 /* 690 * determine last modification time (in GMT) of remote file 691 */ 692 time_t 693 remotemodtime(const char *file, int noisy) 694 { 695 int overbose, ocode, r; 696 time_t rtime; 697 698 overbose = verbose; 699 ocode = code; 700 rtime = -1; 701 if (ftp_debug == 0) 702 verbose = -1; 703 if (! features[FEAT_MDTM]) { 704 if (noisy) 705 fprintf(ttyout, 706 "MDTM is not supported by remote server.\n"); 707 goto cleanup_parse_time; 708 } 709 r = command("MDTM %s", file); 710 if (r == COMPLETE) { 711 struct tm timebuf; 712 char *timestr, *frac; 713 714 /* 715 * time-val = 14DIGIT [ "." 1*DIGIT ] 716 * YYYYMMDDHHMMSS[.sss] 717 * mdtm-response = "213" SP time-val CRLF / error-response 718 */ 719 timestr = reply_string + 4; 720 721 /* 722 * parse fraction. 723 * XXX: ignored for now 724 */ 725 frac = strchr(timestr, '\r'); 726 if (frac != NULL) 727 *frac = '\0'; 728 frac = strchr(timestr, '.'); 729 if (frac != NULL) 730 *frac++ = '\0'; 731 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) { 732 /* 733 * XXX: Workaround for lame ftpd's that return 734 * `19100' instead of `2000' 735 */ 736 fprintf(ttyout, 737 "Y2K warning! Incorrect time-val `%s' received from server.\n", 738 timestr); 739 timestr++; 740 timestr[0] = '2'; 741 timestr[1] = '0'; 742 fprintf(ttyout, "Converted to `%s'\n", timestr); 743 } 744 memset(&timebuf, 0, sizeof(timebuf)); 745 if (strlen(timestr) != 14 || 746 (strptime(timestr, "%Y%m%d%H%M%S", &timebuf) == NULL)) { 747 bad_parse_time: 748 fprintf(ttyout, "Can't parse time `%s'.\n", timestr); 749 goto cleanup_parse_time; 750 } 751 timebuf.tm_isdst = -1; 752 rtime = timegm(&timebuf); 753 if (rtime == -1) { 754 if (noisy || ftp_debug != 0) 755 goto bad_parse_time; 756 else 757 goto cleanup_parse_time; 758 } else 759 DPRINTF("remotemodtime: parsed date `%s' as " LLF 760 ", %s", 761 timestr, (LLT)rtime, 762 rfc2822time(localtime(&rtime))); 763 } else { 764 if (r == ERROR && code == 500 && features[FEAT_MDTM] == -1) 765 features[FEAT_MDTM] = 0; 766 if (noisy && ftp_debug == 0) { 767 fputs(reply_string, ttyout); 768 putc('\n', ttyout); 769 } 770 } 771 cleanup_parse_time: 772 verbose = overbose; 773 if (rtime == -1) 774 code = ocode; 775 return (rtime); 776 } 777 778 /* 779 * Format tm in an RFC2822 compatible manner, with a trailing \n. 780 * Returns a pointer to a static string containing the result. 781 */ 782 const char * 783 rfc2822time(const struct tm *tm) 784 { 785 static char result[50]; 786 787 if (strftime(result, sizeof(result), 788 "%a, %d %b %Y %H:%M:%S %z\n", tm) == 0) 789 errx(1, "Can't convert RFC2822 time: buffer too small"); 790 return result; 791 } 792 793 /* 794 * Update global `localcwd', which contains the state of the local cwd 795 */ 796 void 797 updatelocalcwd(void) 798 { 799 800 if (getcwd(localcwd, sizeof(localcwd)) == NULL) 801 localcwd[0] = '\0'; 802 DPRINTF("updatelocalcwd: got `%s'\n", localcwd); 803 } 804 805 /* 806 * Update global `remotecwd', which contains the state of the remote cwd 807 */ 808 void 809 updateremotecwd(void) 810 { 811 int overbose, ocode; 812 size_t i; 813 char *cp; 814 815 overbose = verbose; 816 ocode = code; 817 if (ftp_debug == 0) 818 verbose = -1; 819 if (command("PWD") != COMPLETE) 820 goto badremotecwd; 821 cp = strchr(reply_string, ' '); 822 if (cp == NULL || cp[0] == '\0' || cp[1] != '"') 823 goto badremotecwd; 824 cp += 2; 825 for (i = 0; *cp && i < sizeof(remotecwd) - 1; i++, cp++) { 826 if (cp[0] == '"') { 827 if (cp[1] == '"') 828 cp++; 829 else 830 break; 831 } 832 remotecwd[i] = *cp; 833 } 834 remotecwd[i] = '\0'; 835 DPRINTF("updateremotecwd: got `%s'\n", remotecwd); 836 goto cleanupremotecwd; 837 badremotecwd: 838 remotecwd[0]='\0'; 839 cleanupremotecwd: 840 verbose = overbose; 841 code = ocode; 842 } 843 844 /* 845 * Ensure file is in or under dir. 846 * Returns 1 if so, 0 if not (or an error occurred). 847 */ 848 int 849 fileindir(const char *file, const char *dir) 850 { 851 char parentdirbuf[PATH_MAX+1], *parentdir; 852 char realdir[PATH_MAX+1]; 853 size_t dirlen; 854 855 /* determine parent directory of file */ 856 (void)strlcpy(parentdirbuf, file, sizeof(parentdirbuf)); 857 parentdir = dirname(parentdirbuf); 858 if (strcmp(parentdir, ".") == 0) 859 return 1; /* current directory is ok */ 860 861 /* find the directory */ 862 if (realpath(parentdir, realdir) == NULL) { 863 warn("Unable to determine real path of `%s'", parentdir); 864 return 0; 865 } 866 if (realdir[0] != '/') /* relative result is ok */ 867 return 1; 868 dirlen = strlen(dir); 869 if (strncmp(realdir, dir, dirlen) == 0 && 870 (realdir[dirlen] == '/' || realdir[dirlen] == '\0')) 871 return 1; 872 return 0; 873 } 874 875 /* 876 * List words in stringlist, vertically arranged 877 */ 878 void 879 list_vertical(StringList *sl) 880 { 881 size_t i, j; 882 size_t columns, lines; 883 char *p; 884 size_t w, width; 885 886 width = 0; 887 888 for (i = 0 ; i < sl->sl_cur ; i++) { 889 w = strlen(sl->sl_str[i]); 890 if (w > width) 891 width = w; 892 } 893 width = (width + 8) &~ 7; 894 895 columns = ttywidth / width; 896 if (columns == 0) 897 columns = 1; 898 lines = (sl->sl_cur + columns - 1) / columns; 899 for (i = 0; i < lines; i++) { 900 for (j = 0; j < columns; j++) { 901 p = sl->sl_str[j * lines + i]; 902 if (p) 903 fputs(p, ttyout); 904 if (j * lines + i + lines >= sl->sl_cur) { 905 putc('\n', ttyout); 906 break; 907 } 908 if (p) { 909 w = strlen(p); 910 while (w < width) { 911 w = (w + 8) &~ 7; 912 (void)putc('\t', ttyout); 913 } 914 } 915 } 916 } 917 } 918 919 /* 920 * Update the global ttywidth value, using TIOCGWINSZ. 921 */ 922 void 923 setttywidth(int a) 924 { 925 struct winsize winsize; 926 int oerrno = errno; 927 928 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 && 929 winsize.ws_col != 0) 930 ttywidth = winsize.ws_col; 931 else 932 ttywidth = 80; 933 errno = oerrno; 934 } 935 936 /* 937 * Change the rate limit up (SIGUSR1) or down (SIGUSR2) 938 */ 939 void 940 crankrate(int sig) 941 { 942 943 switch (sig) { 944 case SIGUSR1: 945 if (rate_get) 946 rate_get += rate_get_incr; 947 if (rate_put) 948 rate_put += rate_put_incr; 949 break; 950 case SIGUSR2: 951 if (rate_get && rate_get > rate_get_incr) 952 rate_get -= rate_get_incr; 953 if (rate_put && rate_put > rate_put_incr) 954 rate_put -= rate_put_incr; 955 break; 956 default: 957 err(1, "crankrate invoked with unknown signal: %d", sig); 958 } 959 } 960 961 962 /* 963 * Setup or cleanup EditLine structures 964 */ 965 #ifndef NO_EDITCOMPLETE 966 void 967 controlediting(void) 968 { 969 if (editing && el == NULL && hist == NULL) { 970 HistEvent ev; 971 int editmode; 972 973 el = el_init(getprogname(), stdin, ttyout, stderr); 974 /* init editline */ 975 hist = history_init(); /* init the builtin history */ 976 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */ 977 el_set(el, EL_HIST, history, hist); /* use history */ 978 979 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */ 980 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */ 981 el_set(el, EL_RPROMPT, rprompt); 982 983 /* add local file completion, bind to TAB */ 984 el_set(el, EL_ADDFN, "ftp-complete", 985 "Context sensitive argument completion", 986 complete); 987 el_set(el, EL_BIND, "^I", "ftp-complete", NULL); 988 el_source(el, NULL); /* read ~/.editrc */ 989 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0) 990 editing = 0; /* the user doesn't want editing, 991 * so disable, and let statement 992 * below cleanup */ 993 else 994 el_set(el, EL_SIGNAL, 1); 995 } 996 if (!editing) { 997 if (hist) { 998 history_end(hist); 999 hist = NULL; 1000 } 1001 if (el) { 1002 el_end(el); 1003 el = NULL; 1004 } 1005 } 1006 } 1007 #endif /* !NO_EDITCOMPLETE */ 1008 1009 /* 1010 * Convert the string `arg' to an int, which may have an optional SI suffix 1011 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise. 1012 */ 1013 int 1014 strsuftoi(const char *arg) 1015 { 1016 char *cp; 1017 long val; 1018 1019 if (!isdigit((unsigned char)arg[0])) 1020 return (-1); 1021 1022 val = strtol(arg, &cp, 10); 1023 if (cp != NULL) { 1024 if (cp[0] != '\0' && cp[1] != '\0') 1025 return (-1); 1026 switch (tolower((unsigned char)cp[0])) { 1027 case '\0': 1028 case 'b': 1029 break; 1030 case 'k': 1031 val <<= 10; 1032 break; 1033 case 'm': 1034 val <<= 20; 1035 break; 1036 case 'g': 1037 val <<= 30; 1038 break; 1039 default: 1040 return (-1); 1041 } 1042 } 1043 if (val < 0 || val > INT_MAX) 1044 return (-1); 1045 1046 return (val); 1047 } 1048 1049 /* 1050 * Set up socket buffer sizes before a connection is made. 1051 */ 1052 void 1053 setupsockbufsize(int sock) 1054 { 1055 1056 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, 1057 (void *)&sndbuf_size, sizeof(sndbuf_size)) == -1) 1058 warn("Unable to set sndbuf size %d", sndbuf_size); 1059 1060 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, 1061 (void *)&rcvbuf_size, sizeof(rcvbuf_size)) == -1) 1062 warn("Unable to set rcvbuf size %d", rcvbuf_size); 1063 } 1064 1065 /* 1066 * Copy characters from src into dst, \ quoting characters that require it 1067 */ 1068 void 1069 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen) 1070 { 1071 size_t di, si; 1072 1073 for (di = si = 0; 1074 src[si] != '\0' && di < dstlen && si < srclen; 1075 di++, si++) { 1076 switch (src[si]) { 1077 case '\\': 1078 case ' ': 1079 case '\t': 1080 case '\r': 1081 case '\n': 1082 case '"': 1083 dst[di++] = '\\'; 1084 if (di >= dstlen) 1085 break; 1086 /* FALLTHROUGH */ 1087 default: 1088 dst[di] = src[si]; 1089 } 1090 } 1091 dst[di] = '\0'; 1092 } 1093 1094 /* 1095 * Copy src into buf (which is len bytes long), expanding % sequences. 1096 */ 1097 void 1098 formatbuf(char *buf, size_t len, const char *src) 1099 { 1100 const char *p, *p2, *q; 1101 size_t i; 1102 int op, updirs, pdirs; 1103 1104 #define ADDBUF(x) do { \ 1105 if (i >= len - 1) \ 1106 goto endbuf; \ 1107 buf[i++] = (x); \ 1108 } while (0) 1109 1110 p = src; 1111 for (i = 0; *p; p++) { 1112 if (*p != '%') { 1113 ADDBUF(*p); 1114 continue; 1115 } 1116 p++; 1117 1118 switch (op = *p) { 1119 1120 case '/': 1121 case '.': 1122 case 'c': 1123 p2 = connected ? remotecwd : ""; 1124 updirs = pdirs = 0; 1125 1126 /* option to determine fixed # of dirs from path */ 1127 if (op == '.' || op == 'c') { 1128 int skip; 1129 1130 q = p2; 1131 while (*p2) /* calc # of /'s */ 1132 if (*p2++ == '/') 1133 updirs++; 1134 if (p[1] == '0') { /* print <x> or ... */ 1135 pdirs = 1; 1136 p++; 1137 } 1138 if (p[1] >= '1' && p[1] <= '9') { 1139 /* calc # to skip */ 1140 skip = p[1] - '0'; 1141 p++; 1142 } else 1143 skip = 1; 1144 1145 updirs -= skip; 1146 while (skip-- > 0) { 1147 while ((p2 > q) && (*p2 != '/')) 1148 p2--; /* back up */ 1149 if (skip && p2 > q) 1150 p2--; 1151 } 1152 if (*p2 == '/' && p2 != q) 1153 p2++; 1154 } 1155 1156 if (updirs > 0 && pdirs) { 1157 if (i >= len - 5) 1158 break; 1159 if (op == '.') { 1160 ADDBUF('.'); 1161 ADDBUF('.'); 1162 ADDBUF('.'); 1163 } else { 1164 ADDBUF('/'); 1165 ADDBUF('<'); 1166 if (updirs > 9) { 1167 ADDBUF('9'); 1168 ADDBUF('+'); 1169 } else 1170 ADDBUF('0' + updirs); 1171 ADDBUF('>'); 1172 } 1173 } 1174 for (; *p2; p2++) 1175 ADDBUF(*p2); 1176 break; 1177 1178 case 'M': 1179 case 'm': 1180 for (p2 = connected && hostname ? hostname : "-"; 1181 *p2 ; p2++) { 1182 if (op == 'm' && *p2 == '.') 1183 break; 1184 ADDBUF(*p2); 1185 } 1186 break; 1187 1188 case 'n': 1189 for (p2 = connected ? username : "-"; *p2 ; p2++) 1190 ADDBUF(*p2); 1191 break; 1192 1193 case '%': 1194 ADDBUF('%'); 1195 break; 1196 1197 default: /* display unknown codes literally */ 1198 ADDBUF('%'); 1199 ADDBUF(op); 1200 break; 1201 1202 } 1203 } 1204 endbuf: 1205 buf[i] = '\0'; 1206 } 1207 1208 /* 1209 * Determine if given string is an IPv6 address or not. 1210 * Return 1 for yes, 0 for no 1211 */ 1212 int 1213 isipv6addr(const char *addr) 1214 { 1215 int rv = 0; 1216 #ifdef INET6 1217 struct addrinfo hints, *res; 1218 1219 memset(&hints, 0, sizeof(hints)); 1220 hints.ai_family = AF_INET6; 1221 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1222 hints.ai_flags = AI_NUMERICHOST; 1223 if (getaddrinfo(addr, "0", &hints, &res) != 0) 1224 rv = 0; 1225 else { 1226 rv = 1; 1227 freeaddrinfo(res); 1228 } 1229 DPRINTF("isipv6addr: got %d for %s\n", rv, addr); 1230 #endif 1231 return (rv == 1) ? 1 : 0; 1232 } 1233 1234 /* 1235 * Read a line from the FILE stream into buf/buflen using fgets(), so up 1236 * to buflen-1 chars will be read and the result will be NUL terminated. 1237 * If the line has a trailing newline it will be removed. 1238 * If the line is too long, excess characters will be read until 1239 * newline/EOF/error. 1240 * If EOF/error occurs or a too-long line is encountered and errormsg 1241 * isn't NULL, it will be changed to a description of the problem. 1242 * (The EOF message has a leading \n for cosmetic purposes). 1243 * Returns: 1244 * >=0 length of line (excluding trailing newline) if all ok 1245 * -1 error occurred 1246 * -2 EOF encountered 1247 * -3 line was too long 1248 */ 1249 int 1250 getline(FILE *stream, char *buf, size_t buflen, const char **errormsg) 1251 { 1252 int rv, ch; 1253 size_t len; 1254 1255 if (fgets(buf, buflen, stream) == NULL) { 1256 if (feof(stream)) { /* EOF */ 1257 rv = -2; 1258 if (errormsg) 1259 *errormsg = "\nEOF received"; 1260 } else { /* error */ 1261 rv = -1; 1262 if (errormsg) 1263 *errormsg = "Error encountered"; 1264 } 1265 clearerr(stream); 1266 return rv; 1267 } 1268 len = strlen(buf); 1269 if (buf[len-1] == '\n') { /* clear any trailing newline */ 1270 buf[--len] = '\0'; 1271 } else if (len == buflen-1) { /* line too long */ 1272 while ((ch = getchar()) != '\n' && ch != EOF) 1273 continue; 1274 if (errormsg) 1275 *errormsg = "Input line is too long"; 1276 clearerr(stream); 1277 return -3; 1278 } 1279 if (errormsg) 1280 *errormsg = NULL; 1281 return len; 1282 } 1283 1284 /* 1285 * Internal version of connect(2); sets socket buffer sizes, 1286 * binds to a specific local address (if set), and 1287 * supports a connection timeout using a non-blocking connect(2) with 1288 * a poll(2). 1289 * Socket fcntl flags are temporarily updated to include O_NONBLOCK; 1290 * these will not be reverted on connection failure. 1291 * Returns 0 on success, or -1 upon failure (with an appropriate 1292 * error message displayed.) 1293 */ 1294 int 1295 ftp_connect(int sock, const struct sockaddr *name, socklen_t namelen) 1296 { 1297 int flags, rv, timeout, error; 1298 socklen_t slen; 1299 struct timeval endtime, now, td; 1300 struct pollfd pfd[1]; 1301 char hname[NI_MAXHOST]; 1302 char sname[NI_MAXSERV]; 1303 1304 setupsockbufsize(sock); 1305 if (getnameinfo(name, namelen, 1306 hname, sizeof(hname), sname, sizeof(sname), 1307 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 1308 strlcpy(hname, "?", sizeof(hname)); 1309 strlcpy(sname, "?", sizeof(sname)); 1310 } 1311 1312 if (bindai != NULL) { /* bind to specific addr */ 1313 struct addrinfo *ai; 1314 1315 for (ai = bindai; ai != NULL; ai = ai->ai_next) { 1316 if (ai->ai_family == name->sa_family) 1317 break; 1318 } 1319 if (ai == NULL) 1320 ai = bindai; 1321 if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) { 1322 char bname[NI_MAXHOST]; 1323 int saveerr; 1324 1325 saveerr = errno; 1326 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, 1327 bname, sizeof(bname), NULL, 0, NI_NUMERICHOST) != 0) 1328 strlcpy(bname, "?", sizeof(bname)); 1329 errno = saveerr; 1330 warn("Can't bind to `%s'", bname); 1331 return -1; 1332 } 1333 } 1334 1335 /* save current socket flags */ 1336 if ((flags = fcntl(sock, F_GETFL, 0)) == -1) { 1337 warn("Can't %s socket flags for connect to `%s:%s'", 1338 "save", hname, sname); 1339 return -1; 1340 } 1341 /* set non-blocking connect */ 1342 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) { 1343 warn("Can't set socket non-blocking for connect to `%s:%s'", 1344 hname, sname); 1345 return -1; 1346 } 1347 1348 /* NOTE: we now must restore socket flags on successful exit */ 1349 1350 pfd[0].fd = sock; 1351 pfd[0].events = POLLIN|POLLOUT; 1352 1353 if (quit_time > 0) { /* want a non default timeout */ 1354 (void)gettimeofday(&endtime, NULL); 1355 endtime.tv_sec += quit_time; /* determine end time */ 1356 } 1357 1358 rv = connect(sock, name, namelen); /* inititate the connection */ 1359 if (rv == -1) { /* connection error */ 1360 if (errno != EINPROGRESS) { /* error isn't "please wait" */ 1361 connecterror: 1362 warn("Can't connect to `%s:%s'", hname, sname); 1363 return -1; 1364 } 1365 1366 /* connect EINPROGRESS; wait */ 1367 do { 1368 if (quit_time > 0) { /* determine timeout */ 1369 (void)gettimeofday(&now, NULL); 1370 timersub(&endtime, &now, &td); 1371 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1372 if (timeout < 0) 1373 timeout = 0; 1374 } else { 1375 timeout = INFTIM; 1376 } 1377 pfd[0].revents = 0; 1378 rv = ftp_poll(pfd, 1, timeout); 1379 /* loop until poll ! EINTR */ 1380 } while (rv == -1 && errno == EINTR); 1381 1382 if (rv == 0) { /* poll (connect) timed out */ 1383 errno = ETIMEDOUT; 1384 goto connecterror; 1385 } 1386 1387 if (rv == -1) { /* poll error */ 1388 goto connecterror; 1389 } else if (pfd[0].revents & (POLLIN|POLLOUT)) { 1390 slen = sizeof(error); /* OK, or pending error */ 1391 if (getsockopt(sock, SOL_SOCKET, SO_ERROR, 1392 &error, &slen) == -1) { 1393 /* Solaris pending error */ 1394 goto connecterror; 1395 } else if (error != 0) { 1396 errno = error; /* BSD pending error */ 1397 goto connecterror; 1398 } 1399 } else { 1400 errno = EBADF; /* this shouldn't happen ... */ 1401 goto connecterror; 1402 } 1403 } 1404 1405 if (fcntl(sock, F_SETFL, flags) == -1) { 1406 /* restore socket flags */ 1407 warn("Can't %s socket flags for connect to `%s:%s'", 1408 "restore", hname, sname); 1409 return -1; 1410 } 1411 return 0; 1412 } 1413 1414 /* 1415 * Internal version of listen(2); sets socket buffer sizes first. 1416 */ 1417 int 1418 ftp_listen(int sock, int backlog) 1419 { 1420 1421 setupsockbufsize(sock); 1422 return (listen(sock, backlog)); 1423 } 1424 1425 /* 1426 * Internal version of poll(2), to allow reimplementation by select(2) 1427 * on platforms without the former. 1428 */ 1429 int 1430 ftp_poll(struct pollfd *fds, int nfds, int timeout) 1431 { 1432 return poll(fds, nfds, timeout); 1433 } 1434 1435 /* 1436 * malloc() with inbuilt error checking 1437 */ 1438 void * 1439 ftp_malloc(size_t size) 1440 { 1441 void *p; 1442 1443 p = malloc(size); 1444 if (p == NULL) 1445 err(1, "Unable to allocate %ld bytes of memory", (long)size); 1446 return (p); 1447 } 1448 1449 /* 1450 * sl_init() with inbuilt error checking 1451 */ 1452 StringList * 1453 ftp_sl_init(void) 1454 { 1455 StringList *p; 1456 1457 p = sl_init(); 1458 if (p == NULL) 1459 err(1, "Unable to allocate memory for stringlist"); 1460 return (p); 1461 } 1462 1463 /* 1464 * sl_add() with inbuilt error checking 1465 */ 1466 void 1467 ftp_sl_add(StringList *sl, char *i) 1468 { 1469 1470 if (sl_add(sl, i) == -1) 1471 err(1, "Unable to add `%s' to stringlist", i); 1472 } 1473 1474 /* 1475 * strdup() with inbuilt error checking 1476 */ 1477 char * 1478 ftp_strdup(const char *str) 1479 { 1480 char *s; 1481 1482 if (str == NULL) 1483 errx(1, "ftp_strdup: called with NULL argument"); 1484 s = strdup(str); 1485 if (s == NULL) 1486 err(1, "Unable to allocate memory for string copy"); 1487 return (s); 1488 } 1489