1 /* $NetBSD: util.c,v 1.159 2017/11/20 21:11:36 kre 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 1.159 2017/11/20 21:11:36 kre 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 <locale.h> 89 #include <netdb.h> 90 #include <stdio.h> 91 #include <stdlib.h> 92 #include <string.h> 93 #include <termios.h> 94 #include <time.h> 95 #include <tzfile.h> 96 #include <unistd.h> 97 98 #include "ftp_var.h" 99 100 /* 101 * Connect to peer server and auto-login, if possible. 102 */ 103 void 104 setpeer(int argc, char *argv[]) 105 { 106 char *host; 107 const char *port; 108 109 if (argc == 0) 110 goto usage; 111 if (connected) { 112 fprintf(ttyout, "Already connected to %s, use close first.\n", 113 hostname); 114 code = -1; 115 return; 116 } 117 if (argc < 2) 118 (void)another(&argc, &argv, "to"); 119 if (argc < 2 || argc > 3) { 120 usage: 121 UPRINTF("usage: %s host-name [port]\n", argv[0]); 122 code = -1; 123 return; 124 } 125 if (gatemode) 126 port = gateport; 127 else 128 port = ftpport; 129 if (argc > 2) 130 port = argv[2]; 131 132 if (gatemode) { 133 if (gateserver == NULL || *gateserver == '\0') 134 errx(1, "main: gateserver not defined"); 135 host = hookup(gateserver, port); 136 } else 137 host = hookup(argv[1], port); 138 139 if (host) { 140 if (gatemode && verbose) { 141 fprintf(ttyout, 142 "Connecting via pass-through server %s\n", 143 gateserver); 144 } 145 146 connected = 1; 147 /* 148 * Set up defaults for FTP. 149 */ 150 (void)strlcpy(typename, "ascii", sizeof(typename)); 151 type = TYPE_A; 152 curtype = TYPE_A; 153 (void)strlcpy(formname, "non-print", sizeof(formname)); 154 form = FORM_N; 155 (void)strlcpy(modename, "stream", sizeof(modename)); 156 mode = MODE_S; 157 (void)strlcpy(structname, "file", sizeof(structname)); 158 stru = STRU_F; 159 (void)strlcpy(bytename, "8", sizeof(bytename)); 160 bytesize = 8; 161 if (autologin) 162 (void)ftp_login(argv[1], NULL, NULL); 163 } 164 } 165 166 static void 167 parse_feat(const char *fline) 168 { 169 170 /* 171 * work-around broken ProFTPd servers that can't 172 * even obey RFC 2389. 173 */ 174 while (*fline && isspace((int)*fline)) 175 fline++; 176 177 if (strcasecmp(fline, "MDTM") == 0) 178 features[FEAT_MDTM] = 1; 179 else if (strncasecmp(fline, "MLST", sizeof("MLST") - 1) == 0) { 180 features[FEAT_MLST] = 1; 181 } else if (strcasecmp(fline, "REST STREAM") == 0) 182 features[FEAT_REST_STREAM] = 1; 183 else if (strcasecmp(fline, "SIZE") == 0) 184 features[FEAT_SIZE] = 1; 185 else if (strcasecmp(fline, "TVFS") == 0) 186 features[FEAT_TVFS] = 1; 187 } 188 189 /* 190 * Determine the remote system type (SYST) and features (FEAT). 191 * Call after a successful login (i.e, connected = -1) 192 */ 193 void 194 getremoteinfo(void) 195 { 196 int overbose, i; 197 198 overbose = verbose; 199 if (ftp_debug == 0) 200 verbose = -1; 201 202 /* determine remote system type */ 203 if (command("SYST") == COMPLETE) { 204 if (overbose) { 205 int os_len = strcspn(reply_string + 4, " \r\n\t"); 206 if (os_len > 1 && reply_string[4 + os_len - 1] == '.') 207 os_len--; 208 fprintf(ttyout, "Remote system type is %.*s.\n", 209 os_len, reply_string + 4); 210 } 211 /* 212 * Decide whether we should default to bninary. 213 * Traditionally checked for "215 UNIX Type: L8", but 214 * some printers report "Linux" ! so be more forgiving. 215 * In reality we probably almost never want text any more. 216 */ 217 if (!strncasecmp(reply_string + 4, "unix", 4) || 218 !strncasecmp(reply_string + 4, "linux", 5)) { 219 if (proxy) 220 unix_proxy = 1; 221 else 222 unix_server = 1; 223 /* 224 * Set type to 0 (not specified by user), 225 * meaning binary by default, but don't bother 226 * telling server. We can use binary 227 * for text files unless changed by the user. 228 */ 229 type = 0; 230 (void)strlcpy(typename, "binary", sizeof(typename)); 231 if (overbose) 232 fprintf(ttyout, 233 "Using %s mode to transfer files.\n", 234 typename); 235 } else { 236 if (proxy) 237 unix_proxy = 0; 238 else 239 unix_server = 0; 240 if (overbose && 241 !strncmp(reply_string, "215 TOPS20", 10)) 242 fputs( 243 "Remember to set tenex mode when transferring binary files from this machine.\n", 244 ttyout); 245 } 246 } 247 248 /* determine features (if any) */ 249 for (i = 0; i < FEAT_max; i++) 250 features[i] = -1; 251 reply_callback = parse_feat; 252 if (command("FEAT") == COMPLETE) { 253 for (i = 0; i < FEAT_max; i++) { 254 if (features[i] == -1) 255 features[i] = 0; 256 } 257 features[FEAT_FEAT] = 1; 258 } else 259 features[FEAT_FEAT] = 0; 260 #ifndef NO_DEBUG 261 if (ftp_debug) { 262 #define DEBUG_FEAT(x) fprintf(ttyout, "features[" #x "] = %d\n", features[(x)]) 263 DEBUG_FEAT(FEAT_FEAT); 264 DEBUG_FEAT(FEAT_MDTM); 265 DEBUG_FEAT(FEAT_MLST); 266 DEBUG_FEAT(FEAT_REST_STREAM); 267 DEBUG_FEAT(FEAT_SIZE); 268 DEBUG_FEAT(FEAT_TVFS); 269 #undef DEBUG_FEAT 270 } 271 #endif 272 reply_callback = NULL; 273 274 verbose = overbose; 275 } 276 277 /* 278 * Reset the various variables that indicate connection state back to 279 * disconnected settings. 280 * The caller is responsible for issuing any commands to the remote server 281 * to perform a clean shutdown before this is invoked. 282 */ 283 void 284 cleanuppeer(void) 285 { 286 287 if (cout) 288 (void)fclose(cout); 289 cout = NULL; 290 connected = 0; 291 unix_server = 0; 292 unix_proxy = 0; 293 /* 294 * determine if anonftp was specifically set with -a 295 * (1), or implicitly set by auto_fetch() (2). in the 296 * latter case, disable after the current xfer 297 */ 298 if (anonftp == 2) 299 anonftp = 0; 300 data = -1; 301 epsv4bad = 0; 302 epsv6bad = 0; 303 if (username) 304 free(username); 305 username = NULL; 306 if (!proxy) 307 macnum = 0; 308 } 309 310 /* 311 * Top-level signal handler for interrupted commands. 312 */ 313 void 314 intr(int signo) 315 { 316 317 sigint_raised = 1; 318 alarmtimer(0); 319 if (fromatty) 320 write(fileno(ttyout), "\n", 1); 321 siglongjmp(toplevel, 1); 322 } 323 324 /* 325 * Signal handler for lost connections; cleanup various elements of 326 * the connection state, and call cleanuppeer() to finish it off. 327 */ 328 void 329 lostpeer(int dummy) 330 { 331 int oerrno = errno; 332 333 alarmtimer(0); 334 if (connected) { 335 if (cout != NULL) { 336 (void)shutdown(fileno(cout), 1+1); 337 (void)fclose(cout); 338 cout = NULL; 339 } 340 if (data >= 0) { 341 (void)shutdown(data, 1+1); 342 (void)close(data); 343 data = -1; 344 } 345 connected = 0; 346 } 347 pswitch(1); 348 if (connected) { 349 if (cout != NULL) { 350 (void)shutdown(fileno(cout), 1+1); 351 (void)fclose(cout); 352 cout = NULL; 353 } 354 connected = 0; 355 } 356 proxflag = 0; 357 pswitch(0); 358 cleanuppeer(); 359 errno = oerrno; 360 } 361 362 363 /* 364 * Login to remote host, using given username & password if supplied. 365 * Return non-zero if successful. 366 */ 367 int 368 ftp_login(const char *host, const char *luser, const char *lpass) 369 { 370 char tmp[80]; 371 char *fuser, *pass, *facct, *p; 372 char emptypass[] = ""; 373 const char *errormsg; 374 int n, aflag, rval, nlen; 375 376 aflag = rval = 0; 377 fuser = pass = facct = NULL; 378 if (luser) 379 fuser = ftp_strdup(luser); 380 if (lpass) 381 pass = ftp_strdup(lpass); 382 383 DPRINTF("ftp_login: user `%s' pass `%s' host `%s'\n", 384 STRorNULL(fuser), STRorNULL(pass), STRorNULL(host)); 385 386 /* 387 * Set up arguments for an anonymous FTP session, if necessary. 388 */ 389 if (anonftp) { 390 FREEPTR(fuser); 391 fuser = ftp_strdup("anonymous"); /* as per RFC 1635 */ 392 FREEPTR(pass); 393 pass = ftp_strdup(getoptionvalue("anonpass")); 394 } 395 396 if (ruserpass(host, &fuser, &pass, &facct) < 0) { 397 code = -1; 398 goto cleanup_ftp_login; 399 } 400 401 while (fuser == NULL) { 402 if (localname) 403 fprintf(ttyout, "Name (%s:%s): ", host, localname); 404 else 405 fprintf(ttyout, "Name (%s): ", host); 406 errormsg = NULL; 407 nlen = get_line(stdin, tmp, sizeof(tmp), &errormsg); 408 if (nlen < 0) { 409 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "login"); 410 code = -1; 411 goto cleanup_ftp_login; 412 } else if (nlen == 0) { 413 fuser = ftp_strdup(localname); 414 } else { 415 fuser = ftp_strdup(tmp); 416 } 417 } 418 419 if (gatemode) { 420 char *nuser; 421 size_t len; 422 423 len = strlen(fuser) + 1 + strlen(host) + 1; 424 nuser = ftp_malloc(len); 425 (void)strlcpy(nuser, fuser, len); 426 (void)strlcat(nuser, "@", len); 427 (void)strlcat(nuser, host, len); 428 FREEPTR(fuser); 429 fuser = nuser; 430 } 431 432 n = command("USER %s", fuser); 433 if (n == CONTINUE) { 434 if (pass == NULL) { 435 p = getpass("Password: "); 436 if (p == NULL) 437 p = emptypass; 438 pass = ftp_strdup(p); 439 memset(p, 0, strlen(p)); 440 } 441 n = command("PASS %s", pass); 442 memset(pass, 0, strlen(pass)); 443 } 444 if (n == CONTINUE) { 445 aflag++; 446 if (facct == NULL) { 447 p = getpass("Account: "); 448 if (p == NULL) 449 p = emptypass; 450 facct = ftp_strdup(p); 451 memset(p, 0, strlen(p)); 452 } 453 if (facct[0] == '\0') { 454 warnx("Login failed"); 455 goto cleanup_ftp_login; 456 } 457 n = command("ACCT %s", facct); 458 memset(facct, 0, strlen(facct)); 459 } 460 if ((n != COMPLETE) || 461 (!aflag && facct != NULL && command("ACCT %s", facct) != COMPLETE)) { 462 warnx("Login failed"); 463 goto cleanup_ftp_login; 464 } 465 rval = 1; 466 username = ftp_strdup(fuser); 467 if (proxy) 468 goto cleanup_ftp_login; 469 470 connected = -1; 471 getremoteinfo(); 472 for (n = 0; n < macnum; ++n) { 473 if (!strcmp("init", macros[n].mac_name)) { 474 (void)strlcpy(line, "$init", sizeof(line)); 475 makeargv(); 476 domacro(margc, margv); 477 break; 478 } 479 } 480 updatelocalcwd(); 481 remotecwd[0] = '\0'; 482 remcwdvalid = 0; 483 484 cleanup_ftp_login: 485 FREEPTR(fuser); 486 if (pass != NULL) 487 memset(pass, 0, strlen(pass)); 488 FREEPTR(pass); 489 if (facct != NULL) 490 memset(facct, 0, strlen(facct)); 491 FREEPTR(facct); 492 return (rval); 493 } 494 495 /* 496 * `another' gets another argument, and stores the new argc and argv. 497 * It reverts to the top level (via intr()) on EOF/error. 498 * 499 * Returns false if no new arguments have been added. 500 */ 501 int 502 another(int *pargc, char ***pargv, const char *aprompt) 503 { 504 const char *errormsg; 505 int ret, nlen; 506 size_t len; 507 508 len = strlen(line); 509 if (len >= sizeof(line) - 3) { 510 fputs("Sorry, arguments too long.\n", ttyout); 511 intr(0); 512 } 513 fprintf(ttyout, "(%s) ", aprompt); 514 line[len++] = ' '; 515 errormsg = NULL; 516 nlen = get_line(stdin, line + len, sizeof(line)-len, &errormsg); 517 if (nlen < 0) { 518 fprintf(ttyout, "%s; %s aborted.\n", errormsg, "operation"); 519 intr(0); 520 } 521 len += nlen; 522 makeargv(); 523 ret = margc > *pargc; 524 *pargc = margc; 525 *pargv = margv; 526 return (ret); 527 } 528 529 /* 530 * glob files given in argv[] from the remote server. 531 * if errbuf isn't NULL, store error messages there instead 532 * of writing to the screen. 533 */ 534 char * 535 remglob(char *argv[], int doswitch, const char **errbuf) 536 { 537 static char buf[MAXPATHLEN]; 538 static FILE *ftemp = NULL; 539 static char **args; 540 char temp[MAXPATHLEN]; 541 int oldverbose, oldhash, oldprogress, fd; 542 char *cp; 543 const char *rmode; 544 size_t len; 545 546 if (!mflag || !connected) { 547 if (!doglob) 548 args = NULL; 549 else { 550 if (ftemp) { 551 (void)fclose(ftemp); 552 ftemp = NULL; 553 } 554 } 555 return (NULL); 556 } 557 if (!doglob) { 558 if (args == NULL) 559 args = argv; 560 if ((cp = *++args) == NULL) 561 args = NULL; 562 return (cp); 563 } 564 if (ftemp == NULL) { 565 len = strlcpy(temp, tmpdir, sizeof(temp)); 566 if (temp[len - 1] != '/') 567 (void)strlcat(temp, "/", sizeof(temp)); 568 (void)strlcat(temp, TMPFILE, sizeof(temp)); 569 if ((fd = mkstemp(temp)) < 0) { 570 warn("Unable to create temporary file `%s'", temp); 571 return (NULL); 572 } 573 close(fd); 574 oldverbose = verbose; 575 verbose = (errbuf != NULL) ? -1 : 0; 576 oldhash = hash; 577 oldprogress = progress; 578 hash = 0; 579 progress = 0; 580 if (doswitch) 581 pswitch(!proxy); 582 for (rmode = "w"; *++argv != NULL; rmode = "a") 583 recvrequest("NLST", temp, *argv, rmode, 0, 0); 584 if ((code / 100) != COMPLETE) { 585 if (errbuf != NULL) 586 *errbuf = reply_string; 587 } 588 if (doswitch) 589 pswitch(!proxy); 590 verbose = oldverbose; 591 hash = oldhash; 592 progress = oldprogress; 593 ftemp = fopen(temp, "r"); 594 (void)unlink(temp); 595 if (ftemp == NULL) { 596 if (errbuf == NULL) 597 warnx("Can't find list of remote files"); 598 else 599 *errbuf = 600 "Can't find list of remote files"; 601 return (NULL); 602 } 603 } 604 if (fgets(buf, sizeof(buf), ftemp) == NULL) { 605 (void)fclose(ftemp); 606 ftemp = NULL; 607 return (NULL); 608 } 609 if ((cp = strchr(buf, '\n')) != NULL) 610 *cp = '\0'; 611 return (buf); 612 } 613 614 /* 615 * Glob a local file name specification with the expectation of a single 616 * return value. Can't control multiple values being expanded from the 617 * expression, we return only the first. 618 * Returns NULL on error, or a pointer to a buffer containing the filename 619 * that's the caller's responsiblity to free(3) when finished with. 620 */ 621 char * 622 globulize(const char *pattern) 623 { 624 glob_t gl; 625 int flags; 626 char *p; 627 628 if (!doglob) 629 return (ftp_strdup(pattern)); 630 631 flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_TILDE; 632 memset(&gl, 0, sizeof(gl)); 633 if (glob(pattern, flags, NULL, &gl) || gl.gl_pathc == 0) { 634 warnx("Glob pattern `%s' not found", pattern); 635 globfree(&gl); 636 return (NULL); 637 } 638 p = ftp_strdup(gl.gl_pathv[0]); 639 globfree(&gl); 640 return (p); 641 } 642 643 /* 644 * determine size of remote file 645 */ 646 off_t 647 remotesize(const char *file, int noisy) 648 { 649 int overbose, r; 650 off_t size; 651 652 overbose = verbose; 653 size = -1; 654 if (ftp_debug == 0) 655 verbose = -1; 656 if (! features[FEAT_SIZE]) { 657 if (noisy) 658 fprintf(ttyout, 659 "SIZE is not supported by remote server.\n"); 660 goto cleanup_remotesize; 661 } 662 r = command("SIZE %s", file); 663 if (r == COMPLETE) { 664 char *cp, *ep; 665 666 cp = strchr(reply_string, ' '); 667 if (cp != NULL) { 668 cp++; 669 size = STRTOLL(cp, &ep, 10); 670 if (*ep != '\0' && !isspace((unsigned char)*ep)) 671 size = -1; 672 } 673 } else { 674 if (r == ERROR && code == 500 && features[FEAT_SIZE] == -1) 675 features[FEAT_SIZE] = 0; 676 if (noisy && ftp_debug == 0) { 677 fputs(reply_string, ttyout); 678 putc('\n', ttyout); 679 } 680 } 681 cleanup_remotesize: 682 verbose = overbose; 683 return (size); 684 } 685 686 /* 687 * determine last modification time (in GMT) of remote file 688 */ 689 time_t 690 remotemodtime(const char *file, int noisy) 691 { 692 int overbose, ocode, r; 693 time_t rtime; 694 695 overbose = verbose; 696 ocode = code; 697 rtime = -1; 698 if (ftp_debug == 0) 699 verbose = -1; 700 if (! features[FEAT_MDTM]) { 701 if (noisy) 702 fprintf(ttyout, 703 "MDTM is not supported by remote server.\n"); 704 goto cleanup_parse_time; 705 } 706 r = command("MDTM %s", file); 707 if (r == COMPLETE) { 708 struct tm timebuf; 709 char *timestr, *frac; 710 711 /* 712 * time-val = 14DIGIT [ "." 1*DIGIT ] 713 * YYYYMMDDHHMMSS[.sss] 714 * mdtm-response = "213" SP time-val CRLF / error-response 715 */ 716 timestr = reply_string + 4; 717 718 /* 719 * parse fraction. 720 * XXX: ignored for now 721 */ 722 frac = strchr(timestr, '\r'); 723 if (frac != NULL) 724 *frac = '\0'; 725 frac = strchr(timestr, '.'); 726 if (frac != NULL) 727 *frac++ = '\0'; 728 if (strlen(timestr) == 15 && strncmp(timestr, "191", 3) == 0) { 729 /* 730 * XXX: Workaround for lame ftpd's that return 731 * `19100' instead of `2000' 732 */ 733 fprintf(ttyout, 734 "Y2K warning! Incorrect time-val `%s' received from server.\n", 735 timestr); 736 timestr++; 737 timestr[0] = '2'; 738 timestr[1] = '0'; 739 fprintf(ttyout, "Converted to `%s'\n", timestr); 740 } 741 memset(&timebuf, 0, sizeof(timebuf)); 742 if (strlen(timestr) != 14 || 743 (strptime(timestr, "%Y%m%d%H%M%S", &timebuf) == NULL)) { 744 bad_parse_time: 745 fprintf(ttyout, "Can't parse time `%s'.\n", timestr); 746 goto cleanup_parse_time; 747 } 748 timebuf.tm_isdst = -1; 749 rtime = timegm(&timebuf); 750 if (rtime == -1) { 751 if (noisy || ftp_debug != 0) 752 goto bad_parse_time; 753 else 754 goto cleanup_parse_time; 755 } else { 756 DPRINTF("remotemodtime: parsed time `%s' as " LLF 757 ", %s", 758 timestr, (LLT)rtime, 759 rfc2822time(localtime(&rtime))); 760 } 761 } else { 762 if (r == ERROR && code == 500 && features[FEAT_MDTM] == -1) 763 features[FEAT_MDTM] = 0; 764 if (noisy && ftp_debug == 0) { 765 fputs(reply_string, ttyout); 766 putc('\n', ttyout); 767 } 768 } 769 cleanup_parse_time: 770 verbose = overbose; 771 if (rtime == -1) 772 code = ocode; 773 return (rtime); 774 } 775 776 /* 777 * Format tm in an RFC 2822 compatible manner, with a trailing \n. 778 * Returns a pointer to a static string containing the result. 779 */ 780 const char * 781 rfc2822time(const struct tm *tm) 782 { 783 static char result[50]; 784 785 if (strftime(result, sizeof(result), 786 "%a, %d %b %Y %H:%M:%S %z\n", tm) == 0) 787 errx(1, "Can't convert RFC 2822 time: buffer too small"); 788 return result; 789 } 790 791 /* 792 * Parse HTTP-date as per RFC 2616. 793 * Return a pointer to the next character of the consumed date string, 794 * or NULL if failed. 795 */ 796 const char * 797 parse_rfc2616time(struct tm *parsed, const char *httpdate) 798 { 799 const char *t; 800 const char *curlocale; 801 802 /* The representation of %a depends on the current locale. */ 803 curlocale = setlocale(LC_TIME, NULL); 804 (void)setlocale(LC_TIME, "C"); 805 /* RFC 1123 */ 806 if ((t = strptime(httpdate, "%a, %d %b %Y %H:%M:%S GMT", parsed)) || 807 /* RFC 850 */ 808 (t = strptime(httpdate, "%a, %d-%b-%y %H:%M:%S GMT", parsed)) || 809 /* asctime */ 810 (t = strptime(httpdate, "%a, %b %d %H:%M:%S %Y", parsed))) { 811 ; /* do nothing */ 812 } 813 (void)setlocale(LC_TIME, curlocale); 814 return t; 815 } 816 817 /* 818 * Update global `localcwd', which contains the state of the local cwd 819 */ 820 void 821 updatelocalcwd(void) 822 { 823 824 if (getcwd(localcwd, sizeof(localcwd)) == NULL) 825 localcwd[0] = '\0'; 826 DPRINTF("updatelocalcwd: got `%s'\n", localcwd); 827 } 828 829 /* 830 * Update global `remotecwd', which contains the state of the remote cwd 831 */ 832 void 833 updateremotecwd(void) 834 { 835 int overbose, ocode; 836 size_t i; 837 char *cp; 838 839 remcwdvalid = 1; /* whether it works or not, we are done */ 840 overbose = verbose; 841 ocode = code; 842 if (ftp_debug == 0) 843 verbose = -1; 844 if (command("PWD") != COMPLETE) 845 goto badremotecwd; 846 cp = strchr(reply_string, ' '); 847 if (cp == NULL || cp[0] == '\0' || cp[1] != '"') 848 goto badremotecwd; 849 cp += 2; 850 for (i = 0; *cp && i < sizeof(remotecwd) - 1; i++, cp++) { 851 if (cp[0] == '"') { 852 if (cp[1] == '"') 853 cp++; 854 else 855 break; 856 } 857 remotecwd[i] = *cp; 858 } 859 remotecwd[i] = '\0'; 860 DPRINTF("updateremotecwd: got `%s'\n", remotecwd); 861 goto cleanupremotecwd; 862 badremotecwd: 863 remotecwd[0]='\0'; 864 cleanupremotecwd: 865 verbose = overbose; 866 code = ocode; 867 } 868 869 /* 870 * Ensure file is in or under dir. 871 * Returns 1 if so, 0 if not (or an error occurred). 872 */ 873 int 874 fileindir(const char *file, const char *dir) 875 { 876 char parentdirbuf[PATH_MAX+1], *parentdir; 877 char realdir[PATH_MAX+1]; 878 size_t dirlen; 879 880 /* determine parent directory of file */ 881 (void)strlcpy(parentdirbuf, file, sizeof(parentdirbuf)); 882 parentdir = dirname(parentdirbuf); 883 if (strcmp(parentdir, ".") == 0) 884 return 1; /* current directory is ok */ 885 886 /* find the directory */ 887 if (realpath(parentdir, realdir) == NULL) { 888 warn("Unable to determine real path of `%s'", parentdir); 889 return 0; 890 } 891 if (realdir[0] != '/') /* relative result is ok */ 892 return 1; 893 dirlen = strlen(dir); 894 if (strncmp(realdir, dir, dirlen) == 0 && 895 (realdir[dirlen] == '/' || realdir[dirlen] == '\0')) 896 return 1; 897 return 0; 898 } 899 900 /* 901 * List words in stringlist, vertically arranged 902 */ 903 void 904 list_vertical(StringList *sl) 905 { 906 size_t i, j; 907 size_t columns, lines; 908 char *p; 909 size_t w, width; 910 911 width = 0; 912 913 for (i = 0 ; i < sl->sl_cur ; i++) { 914 w = strlen(sl->sl_str[i]); 915 if (w > width) 916 width = w; 917 } 918 width = (width + 8) &~ 7; 919 920 columns = ttywidth / width; 921 if (columns == 0) 922 columns = 1; 923 lines = (sl->sl_cur + columns - 1) / columns; 924 for (i = 0; i < lines; i++) { 925 for (j = 0; j < columns; j++) { 926 p = sl->sl_str[j * lines + i]; 927 if (p) 928 fputs(p, ttyout); 929 if (j * lines + i + lines >= sl->sl_cur) { 930 putc('\n', ttyout); 931 break; 932 } 933 if (p) { 934 w = strlen(p); 935 while (w < width) { 936 w = (w + 8) &~ 7; 937 (void)putc('\t', ttyout); 938 } 939 } 940 } 941 } 942 } 943 944 /* 945 * Update the global ttywidth value, using TIOCGWINSZ. 946 */ 947 void 948 setttywidth(int a) 949 { 950 struct winsize winsize; 951 int oerrno = errno; 952 953 if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 && 954 winsize.ws_col != 0) 955 ttywidth = winsize.ws_col; 956 else 957 ttywidth = 80; 958 errno = oerrno; 959 } 960 961 /* 962 * Change the rate limit up (SIGUSR1) or down (SIGUSR2) 963 */ 964 void 965 crankrate(int sig) 966 { 967 968 switch (sig) { 969 case SIGUSR1: 970 if (rate_get) 971 rate_get += rate_get_incr; 972 if (rate_put) 973 rate_put += rate_put_incr; 974 break; 975 case SIGUSR2: 976 if (rate_get && rate_get > rate_get_incr) 977 rate_get -= rate_get_incr; 978 if (rate_put && rate_put > rate_put_incr) 979 rate_put -= rate_put_incr; 980 break; 981 default: 982 err(1, "crankrate invoked with unknown signal: %d", sig); 983 } 984 } 985 986 987 /* 988 * Setup or cleanup EditLine structures 989 */ 990 #ifndef NO_EDITCOMPLETE 991 void 992 controlediting(void) 993 { 994 if (editing && el == NULL && hist == NULL) { 995 HistEvent ev; 996 int editmode; 997 998 el = el_init(getprogname(), stdin, ttyout, stderr); 999 /* init editline */ 1000 hist = history_init(); /* init the builtin history */ 1001 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */ 1002 el_set(el, EL_HIST, history, hist); /* use history */ 1003 1004 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */ 1005 el_set(el, EL_PROMPT, prompt); /* set the prompt functions */ 1006 el_set(el, EL_RPROMPT, rprompt); 1007 1008 /* add local file completion, bind to TAB */ 1009 el_set(el, EL_ADDFN, "ftp-complete", 1010 "Context sensitive argument completion", 1011 complete); 1012 el_set(el, EL_BIND, "^I", "ftp-complete", NULL); 1013 el_source(el, NULL); /* read ~/.editrc */ 1014 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0) 1015 editing = 0; /* the user doesn't want editing, 1016 * so disable, and let statement 1017 * below cleanup */ 1018 else 1019 el_set(el, EL_SIGNAL, 1); 1020 } 1021 if (!editing) { 1022 if (hist) { 1023 history_end(hist); 1024 hist = NULL; 1025 } 1026 if (el) { 1027 el_end(el); 1028 el = NULL; 1029 } 1030 } 1031 } 1032 #endif /* !NO_EDITCOMPLETE */ 1033 1034 /* 1035 * Convert the string `arg' to an int, which may have an optional SI suffix 1036 * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise. 1037 */ 1038 int 1039 strsuftoi(const char *arg) 1040 { 1041 char *cp; 1042 long val; 1043 1044 if (!isdigit((unsigned char)arg[0])) 1045 return (-1); 1046 1047 val = strtol(arg, &cp, 10); 1048 if (cp != NULL) { 1049 if (cp[0] != '\0' && cp[1] != '\0') 1050 return (-1); 1051 switch (tolower((unsigned char)cp[0])) { 1052 case '\0': 1053 case 'b': 1054 break; 1055 case 'k': 1056 val <<= 10; 1057 break; 1058 case 'm': 1059 val <<= 20; 1060 break; 1061 case 'g': 1062 val <<= 30; 1063 break; 1064 default: 1065 return (-1); 1066 } 1067 } 1068 if (val < 0 || val > INT_MAX) 1069 return (-1); 1070 1071 return (val); 1072 } 1073 1074 /* 1075 * Set up socket buffer sizes before a connection is made. 1076 */ 1077 void 1078 setupsockbufsize(int sock) 1079 { 1080 socklen_t slen; 1081 1082 if (0 == rcvbuf_size) { 1083 slen = sizeof(rcvbuf_size); 1084 if (getsockopt(sock, SOL_SOCKET, SO_RCVBUF, 1085 (void *)&rcvbuf_size, &slen) == -1) 1086 err(1, "Unable to determine rcvbuf size"); 1087 if (rcvbuf_size <= 0) 1088 rcvbuf_size = 8 * 1024; 1089 if (rcvbuf_size > 8 * 1024 * 1024) 1090 rcvbuf_size = 8 * 1024 * 1024; 1091 DPRINTF("setupsockbufsize: rcvbuf_size determined as %d\n", 1092 rcvbuf_size); 1093 } 1094 if (0 == sndbuf_size) { 1095 slen = sizeof(sndbuf_size); 1096 if (getsockopt(sock, SOL_SOCKET, SO_SNDBUF, 1097 (void *)&sndbuf_size, &slen) == -1) 1098 err(1, "Unable to determine sndbuf size"); 1099 if (sndbuf_size <= 0) 1100 sndbuf_size = 8 * 1024; 1101 if (sndbuf_size > 8 * 1024 * 1024) 1102 sndbuf_size = 8 * 1024 * 1024; 1103 DPRINTF("setupsockbufsize: sndbuf_size determined as %d\n", 1104 sndbuf_size); 1105 } 1106 1107 if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF, 1108 (void *)&sndbuf_size, sizeof(sndbuf_size)) == -1) 1109 warn("Unable to set sndbuf size %d", sndbuf_size); 1110 1111 if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF, 1112 (void *)&rcvbuf_size, sizeof(rcvbuf_size)) == -1) 1113 warn("Unable to set rcvbuf size %d", rcvbuf_size); 1114 } 1115 1116 /* 1117 * Copy characters from src into dst, \ quoting characters that require it 1118 */ 1119 void 1120 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen) 1121 { 1122 size_t di, si; 1123 1124 di = si = 0; 1125 while (src[si] != '\0' && di < dstlen && si < srclen) { 1126 switch (src[si]) { 1127 case '\\': 1128 case ' ': 1129 case '\t': 1130 case '\r': 1131 case '\n': 1132 case '"': 1133 /* 1134 * Need room for two characters and NUL, avoiding 1135 * incomplete escape sequences at end of dst. 1136 */ 1137 if (di >= dstlen - 3) 1138 break; 1139 dst[di++] = '\\'; 1140 /* FALLTHROUGH */ 1141 default: 1142 dst[di] = src[si++]; 1143 if (di < dstlen) 1144 di++; 1145 } 1146 } 1147 dst[di] = '\0'; 1148 } 1149 1150 /* 1151 * Copy src into buf (which is len bytes long), expanding % sequences. 1152 */ 1153 void 1154 formatbuf(char *buf, size_t len, const char *src) 1155 { 1156 const char *p, *p2, *q; 1157 size_t i; 1158 int op, updirs, pdirs; 1159 1160 #define ADDBUF(x) do { \ 1161 if (i >= len - 1) \ 1162 goto endbuf; \ 1163 buf[i++] = (x); \ 1164 } while (0) 1165 1166 p = src; 1167 for (i = 0; *p; p++) { 1168 if (*p != '%') { 1169 ADDBUF(*p); 1170 continue; 1171 } 1172 p++; 1173 1174 switch (op = *p) { 1175 1176 case '/': 1177 case '.': 1178 case 'c': 1179 if (connected && !remcwdvalid) 1180 updateremotecwd(); 1181 p2 = connected ? remotecwd : ""; 1182 updirs = pdirs = 0; 1183 1184 /* option to determine fixed # of dirs from path */ 1185 if (op == '.' || op == 'c') { 1186 int skip; 1187 1188 q = p2; 1189 while (*p2) /* calc # of /'s */ 1190 if (*p2++ == '/') 1191 updirs++; 1192 if (p[1] == '0') { /* print <x> or ... */ 1193 pdirs = 1; 1194 p++; 1195 } 1196 if (p[1] >= '1' && p[1] <= '9') { 1197 /* calc # to skip */ 1198 skip = p[1] - '0'; 1199 p++; 1200 } else 1201 skip = 1; 1202 1203 updirs -= skip; 1204 while (skip-- > 0) { 1205 while ((p2 > q) && (*p2 != '/')) 1206 p2--; /* back up */ 1207 if (skip && p2 > q) 1208 p2--; 1209 } 1210 if (*p2 == '/' && p2 != q) 1211 p2++; 1212 } 1213 1214 if (updirs > 0 && pdirs) { 1215 if (i >= len - 5) 1216 break; 1217 if (op == '.') { 1218 ADDBUF('.'); 1219 ADDBUF('.'); 1220 ADDBUF('.'); 1221 } else { 1222 ADDBUF('/'); 1223 ADDBUF('<'); 1224 if (updirs > 9) { 1225 ADDBUF('9'); 1226 ADDBUF('+'); 1227 } else 1228 ADDBUF('0' + updirs); 1229 ADDBUF('>'); 1230 } 1231 } 1232 for (; *p2; p2++) 1233 ADDBUF(*p2); 1234 break; 1235 1236 case 'M': 1237 case 'm': 1238 for (p2 = connected && hostname ? hostname : "-"; 1239 *p2 ; p2++) { 1240 if (op == 'm' && *p2 == '.') 1241 break; 1242 ADDBUF(*p2); 1243 } 1244 break; 1245 1246 case 'n': 1247 for (p2 = connected ? username : "-"; *p2 ; p2++) 1248 ADDBUF(*p2); 1249 break; 1250 1251 case '%': 1252 ADDBUF('%'); 1253 break; 1254 1255 default: /* display unknown codes literally */ 1256 ADDBUF('%'); 1257 ADDBUF(op); 1258 break; 1259 1260 } 1261 } 1262 endbuf: 1263 buf[i] = '\0'; 1264 } 1265 1266 /* 1267 * Determine if given string is an IPv6 address or not. 1268 * Return 1 for yes, 0 for no 1269 */ 1270 int 1271 isipv6addr(const char *addr) 1272 { 1273 int rv = 0; 1274 #ifdef INET6 1275 struct addrinfo hints, *res; 1276 1277 memset(&hints, 0, sizeof(hints)); 1278 hints.ai_family = AF_INET6; 1279 hints.ai_socktype = SOCK_DGRAM; /*dummy*/ 1280 hints.ai_flags = AI_NUMERICHOST; 1281 if (getaddrinfo(addr, "0", &hints, &res) != 0) 1282 rv = 0; 1283 else { 1284 rv = 1; 1285 freeaddrinfo(res); 1286 } 1287 DPRINTF("isipv6addr: got %d for %s\n", rv, addr); 1288 #endif 1289 return (rv == 1) ? 1 : 0; 1290 } 1291 1292 /* 1293 * Read a line from the FILE stream into buf/buflen using fgets(), so up 1294 * to buflen-1 chars will be read and the result will be NUL terminated. 1295 * If the line has a trailing newline it will be removed. 1296 * If the line is too long, excess characters will be read until 1297 * newline/EOF/error. 1298 * If EOF/error occurs or a too-long line is encountered and errormsg 1299 * isn't NULL, it will be changed to a description of the problem. 1300 * (The EOF message has a leading \n for cosmetic purposes). 1301 * Returns: 1302 * >=0 length of line (excluding trailing newline) if all ok 1303 * -1 error occurred 1304 * -2 EOF encountered 1305 * -3 line was too long 1306 */ 1307 int 1308 get_line(FILE *stream, char *buf, size_t buflen, const char **errormsg) 1309 { 1310 int rv, ch; 1311 size_t len; 1312 1313 if (fgets(buf, buflen, stream) == NULL) { 1314 if (feof(stream)) { /* EOF */ 1315 rv = -2; 1316 if (errormsg) 1317 *errormsg = "\nEOF received"; 1318 } else { /* error */ 1319 rv = -1; 1320 if (errormsg) 1321 *errormsg = "Error encountered"; 1322 } 1323 clearerr(stream); 1324 return rv; 1325 } 1326 len = strlen(buf); 1327 if (buf[len-1] == '\n') { /* clear any trailing newline */ 1328 buf[--len] = '\0'; 1329 } else if (len == buflen-1) { /* line too long */ 1330 while ((ch = getchar()) != '\n' && ch != EOF) 1331 continue; 1332 if (errormsg) 1333 *errormsg = "Input line is too long"; 1334 clearerr(stream); 1335 return -3; 1336 } 1337 if (errormsg) 1338 *errormsg = NULL; 1339 return len; 1340 } 1341 1342 /* 1343 * Internal version of connect(2); sets socket buffer sizes, 1344 * binds to a specific local address (if set), and 1345 * supports a connection timeout using a non-blocking connect(2) with 1346 * a poll(2). 1347 * Socket fcntl flags are temporarily updated to include O_NONBLOCK; 1348 * these will not be reverted on connection failure. 1349 * Returns 0 on success, or -1 upon failure (with an appropriate 1350 * error message displayed.) 1351 */ 1352 int 1353 ftp_connect(int sock, const struct sockaddr *name, socklen_t namelen, int pe) 1354 { 1355 int flags, rv, timeout, error; 1356 socklen_t slen; 1357 struct timeval endtime, now, td; 1358 struct pollfd pfd[1]; 1359 char hname[NI_MAXHOST]; 1360 char sname[NI_MAXSERV]; 1361 1362 setupsockbufsize(sock); 1363 if (getnameinfo(name, namelen, 1364 hname, sizeof(hname), sname, sizeof(sname), 1365 NI_NUMERICHOST | NI_NUMERICSERV) != 0) { 1366 strlcpy(hname, "?", sizeof(hname)); 1367 strlcpy(sname, "?", sizeof(sname)); 1368 } 1369 1370 if (bindai != NULL) { /* bind to specific addr */ 1371 struct addrinfo *ai; 1372 1373 for (ai = bindai; ai != NULL; ai = ai->ai_next) { 1374 if (ai->ai_family == name->sa_family) 1375 break; 1376 } 1377 if (ai == NULL) 1378 ai = bindai; 1379 if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) { 1380 char bname[NI_MAXHOST]; 1381 int saveerr; 1382 1383 saveerr = errno; 1384 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, 1385 bname, sizeof(bname), NULL, 0, NI_NUMERICHOST) != 0) 1386 strlcpy(bname, "?", sizeof(bname)); 1387 errno = saveerr; 1388 warn("Can't bind to `%s'", bname); 1389 return -1; 1390 } 1391 } 1392 1393 /* save current socket flags */ 1394 if ((flags = fcntl(sock, F_GETFL, 0)) == -1) { 1395 warn("Can't %s socket flags for connect to `%s:%s'", 1396 "save", hname, sname); 1397 return -1; 1398 } 1399 /* set non-blocking connect */ 1400 if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) { 1401 warn("Can't set socket non-blocking for connect to `%s:%s'", 1402 hname, sname); 1403 return -1; 1404 } 1405 1406 /* NOTE: we now must restore socket flags on successful exit */ 1407 1408 pfd[0].fd = sock; 1409 pfd[0].events = POLLIN|POLLOUT; 1410 1411 if (quit_time > 0) { /* want a non default timeout */ 1412 (void)gettimeofday(&endtime, NULL); 1413 endtime.tv_sec += quit_time; /* determine end time */ 1414 } 1415 1416 rv = connect(sock, name, namelen); /* inititate the connection */ 1417 if (rv == -1) { /* connection error */ 1418 if (errno != EINPROGRESS) { /* error isn't "please wait" */ 1419 if (pe || (errno != EHOSTUNREACH)) 1420 connecterror: 1421 warn("Can't connect to `%s:%s'", hname, sname); 1422 return -1; 1423 } 1424 1425 /* connect EINPROGRESS; wait */ 1426 do { 1427 if (quit_time > 0) { /* determine timeout */ 1428 (void)gettimeofday(&now, NULL); 1429 timersub(&endtime, &now, &td); 1430 timeout = td.tv_sec * 1000 + td.tv_usec/1000; 1431 if (timeout < 0) 1432 timeout = 0; 1433 } else { 1434 timeout = INFTIM; 1435 } 1436 pfd[0].revents = 0; 1437 rv = ftp_poll(pfd, 1, timeout); 1438 /* loop until poll ! EINTR */ 1439 } while (rv == -1 && errno == EINTR); 1440 1441 if (rv == 0) { /* poll (connect) timed out */ 1442 errno = ETIMEDOUT; 1443 goto connecterror; 1444 } 1445 1446 if (rv == -1) { /* poll error */ 1447 goto connecterror; 1448 } else if (pfd[0].revents & (POLLIN|POLLOUT)) { 1449 slen = sizeof(error); /* OK, or pending error */ 1450 if (getsockopt(sock, SOL_SOCKET, SO_ERROR, 1451 &error, &slen) == -1) { 1452 /* Solaris pending error */ 1453 goto connecterror; 1454 } else if (error != 0) { 1455 errno = error; /* BSD pending error */ 1456 goto connecterror; 1457 } 1458 } else { 1459 errno = EBADF; /* this shouldn't happen ... */ 1460 goto connecterror; 1461 } 1462 } 1463 1464 if (fcntl(sock, F_SETFL, flags) == -1) { 1465 /* restore socket flags */ 1466 warn("Can't %s socket flags for connect to `%s:%s'", 1467 "restore", hname, sname); 1468 return -1; 1469 } 1470 return 0; 1471 } 1472 1473 /* 1474 * Internal version of listen(2); sets socket buffer sizes first. 1475 */ 1476 int 1477 ftp_listen(int sock, int backlog) 1478 { 1479 1480 setupsockbufsize(sock); 1481 return (listen(sock, backlog)); 1482 } 1483 1484 /* 1485 * Internal version of poll(2), to allow reimplementation by select(2) 1486 * on platforms without the former. 1487 */ 1488 int 1489 ftp_poll(struct pollfd *fds, int nfds, int timeout) 1490 { 1491 return poll(fds, nfds, timeout); 1492 } 1493 1494 /* 1495 * malloc() with inbuilt error checking 1496 */ 1497 void * 1498 ftp_malloc(size_t size) 1499 { 1500 void *p; 1501 1502 p = malloc(size); 1503 if (p == NULL) 1504 err(1, "Unable to allocate %ld bytes of memory", (long)size); 1505 return (p); 1506 } 1507 1508 /* 1509 * sl_init() with inbuilt error checking 1510 */ 1511 StringList * 1512 ftp_sl_init(void) 1513 { 1514 StringList *p; 1515 1516 p = sl_init(); 1517 if (p == NULL) 1518 err(1, "Unable to allocate memory for stringlist"); 1519 return (p); 1520 } 1521 1522 /* 1523 * sl_add() with inbuilt error checking 1524 */ 1525 void 1526 ftp_sl_add(StringList *sl, char *i) 1527 { 1528 1529 if (sl_add(sl, i) == -1) 1530 err(1, "Unable to add `%s' to stringlist", i); 1531 } 1532 1533 /* 1534 * strdup() with inbuilt error checking 1535 */ 1536 char * 1537 ftp_strdup(const char *str) 1538 { 1539 char *s; 1540 1541 if (str == NULL) 1542 errx(1, "ftp_strdup: called with NULL argument"); 1543 s = strdup(str); 1544 if (s == NULL) 1545 err(1, "Unable to allocate memory for string copy"); 1546 return (s); 1547 } 1548