contrib/tnftp/util.c

   1 /*      $NetBSD: util.c,v 1.144 2007/12/05 03:46:34 lukem Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1997-2007 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 1.144 2007/12/05 03:46:34 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 0
 875 printf("file %s parent %s realdir %s dir %s [%d]\n",
 876     file, parentdir, realdir, dir, dirlen);
 877 #endif
 878         if (strncmp(realdir, dir, dirlen) == 0 &&
 879             (realdir[dirlen] == '/' || realdir[dirlen] == '\0'))
 880                 return 1;
 881         return 0;
 882 }
 883
 884 /*
 885  * List words in stringlist, vertically arranged
 886  */
 887 void
 888 list_vertical(StringList *sl)
 889 {
 890         int i, j;
 891         int columns, lines;
 892         char *p;
 893         size_t w, width;
 894
 895         width = 0;
 896
 897         for (i = 0 ; i < sl->sl_cur ; i++) {
 898                 w = strlen(sl->sl_str[i]);
 899                 if (w > width)
 900                         width = w;
 901         }
 902         width = (width + 8) &~ 7;
 903
 904         columns = ttywidth / width;
 905         if (columns == 0)
 906                 columns = 1;
 907         lines = (sl->sl_cur + columns - 1) / columns;
 908         for (i = 0; i < lines; i++) {
 909                 for (j = 0; j < columns; j++) {
 910                         p = sl->sl_str[j * lines + i];
 911                         if (p)
 912                                 fputs(p, ttyout);
 913                         if (j * lines + i + lines >= sl->sl_cur) {
 914                                 putc('\n', ttyout);
 915                                 break;
 916                         }
 917                         if (p) {
 918                                 w = strlen(p);
 919                                 while (w < width) {
 920                                         w = (w + 8) &~ 7;
 921                                         (void)putc('\t', ttyout);
 922                                 }
 923                         }
 924                 }
 925         }
 926 }
 927
 928 /*
 929  * Update the global ttywidth value, using TIOCGWINSZ.
 930  */
 931 void
 932 setttywidth(int a)
 933 {
 934         struct winsize winsize;
 935         int oerrno = errno;
 936
 937         if (ioctl(fileno(ttyout), TIOCGWINSZ, &winsize) != -1 &&
 938             winsize.ws_col != 0)
 939                 ttywidth = winsize.ws_col;
 940         else
 941                 ttywidth = 80;
 942         errno = oerrno;
 943 }
 944
 945 /*
 946  * Change the rate limit up (SIGUSR1) or down (SIGUSR2)
 947  */
 948 void
 949 crankrate(int sig)
 950 {
 951
 952         switch (sig) {
 953         case SIGUSR1:
 954                 if (rate_get)
 955                         rate_get += rate_get_incr;
 956                 if (rate_put)
 957                         rate_put += rate_put_incr;
 958                 break;
 959         case SIGUSR2:
 960                 if (rate_get && rate_get > rate_get_incr)
 961                         rate_get -= rate_get_incr;
 962                 if (rate_put && rate_put > rate_put_incr)
 963                         rate_put -= rate_put_incr;
 964                 break;
 965         default:
 966                 err(1, "crankrate invoked with unknown signal: %d", sig);
 967         }
 968 }
 969
 970
 971 /*
 972  * Setup or cleanup EditLine structures
 973  */
 974 #ifndef NO_EDITCOMPLETE
 975 void
 976 controlediting(void)
 977 {
 978         if (editing && el == NULL && hist == NULL) {
 979                 HistEvent ev;
 980                 int editmode;
 981
 982                 el = el_init(getprogname(), stdin, ttyout, stderr);
 983                 /* init editline */
 984                 hist = history_init();          /* init the builtin history */
 985                 history(hist, &ev, H_SETSIZE, 100);/* remember 100 events */
 986                 el_set(el, EL_HIST, history, hist);     /* use history */
 987
 988                 el_set(el, EL_EDITOR, "emacs"); /* default editor is emacs */
 989                 el_set(el, EL_PROMPT, prompt);  /* set the prompt functions */
 990                 el_set(el, EL_RPROMPT, rprompt);
 991
 992                 /* add local file completion, bind to TAB */
 993                 el_set(el, EL_ADDFN, "ftp-complete",
 994                     "Context sensitive argument completion",
 995                     complete);
 996                 el_set(el, EL_BIND, "^I", "ftp-complete", NULL);
 997                 el_source(el, NULL);    /* read ~/.editrc */
 998                 if ((el_get(el, EL_EDITMODE, &editmode) != -1) && editmode == 0)
 999                         editing = 0;    /* the user doesn't want editing,
1000                                          * so disable, and let statement
1001                                          * below cleanup */
1002                 else
1003                         el_set(el, EL_SIGNAL, 1);
1004         }
1005         if (!editing) {
1006                 if (hist) {
1007                         history_end(hist);
1008                         hist = NULL;
1009                 }
1010                 if (el) {
1011                         el_end(el);
1012                         el = NULL;
1013                 }
1014         }
1015 }
1016 #endif /* !NO_EDITCOMPLETE */
1017
1018 /*
1019  * Convert the string `arg' to an int, which may have an optional SI suffix
1020  * (`b', `k', `m', `g'). Returns the number for success, -1 otherwise.
1021  */
1022 int
1023 strsuftoi(const char *arg)
1024 {
1025         char *cp;
1026         long val;
1027
1028         if (!isdigit((unsigned char)arg[0]))
1029                 return (-1);
1030
1031         val = strtol(arg, &cp, 10);
1032         if (cp != NULL) {
1033                 if (cp[0] != '\0' && cp[1] != '\0')
1034                          return (-1);
1035                 switch (tolower((unsigned char)cp[0])) {
1036                 case '\0':
1037                 case 'b':
1038                         break;
1039                 case 'k':
1040                         val <<= 10;
1041                         break;
1042                 case 'm':
1043                         val <<= 20;
1044                         break;
1045                 case 'g':
1046                         val <<= 30;
1047                         break;
1048                 default:
1049                         return (-1);
1050                 }
1051         }
1052         if (val < 0 || val > INT_MAX)
1053                 return (-1);
1054
1055         return (val);
1056 }
1057
1058 /*
1059  * Set up socket buffer sizes before a connection is made.
1060  */
1061 void
1062 setupsockbufsize(int sock)
1063 {
1064
1065         if (setsockopt(sock, SOL_SOCKET, SO_SNDBUF,
1066             (void *)&sndbuf_size, sizeof(sndbuf_size)) == -1)
1067                 warn("Unable to set sndbuf size %d", sndbuf_size);
1068
1069         if (setsockopt(sock, SOL_SOCKET, SO_RCVBUF,
1070             (void *)&rcvbuf_size, sizeof(rcvbuf_size)) == -1)
1071                 warn("Unable to set rcvbuf size %d", rcvbuf_size);
1072 }
1073
1074 /*
1075  * Copy characters from src into dst, \ quoting characters that require it
1076  */
1077 void
1078 ftpvis(char *dst, size_t dstlen, const char *src, size_t srclen)
1079 {
1080         int     di, si;
1081
1082         for (di = si = 0;
1083             src[si] != '\0' && di < dstlen && si < srclen;
1084             di++, si++) {
1085                 switch (src[si]) {
1086                 case '\\':
1087                 case ' ':
1088                 case '\t':
1089                 case '\r':
1090                 case '\n':
1091                 case '"':
1092                         dst[di++] = '\\';
1093                         if (di >= dstlen)
1094                                 break;
1095                         /* FALLTHROUGH */
1096                 default:
1097                         dst[di] = src[si];
1098                 }
1099         }
1100         dst[di] = '\0';
1101 }
1102
1103 /*
1104  * Copy src into buf (which is len bytes long), expanding % sequences.
1105  */
1106 void
1107 formatbuf(char *buf, size_t len, const char *src)
1108 {
1109         const char      *p, *p2, *q;
1110         int              i, op, updirs, pdirs;
1111
1112 #define ADDBUF(x) do { \
1113                 if (i >= len - 1) \
1114                         goto endbuf; \
1115                 buf[i++] = (x); \
1116         } while (0)
1117
1118         p = src;
1119         for (i = 0; *p; p++) {
1120                 if (*p != '%') {
1121                         ADDBUF(*p);
1122                         continue;
1123                 }
1124                 p++;
1125
1126                 switch (op = *p) {
1127
1128                 case '/':
1129                 case '.':
1130                 case 'c':
1131                         p2 = connected ? remotecwd : "";
1132                         updirs = pdirs = 0;
1133
1134                         /* option to determine fixed # of dirs from path */
1135                         if (op == '.' || op == 'c') {
1136                                 int skip;
1137
1138                                 q = p2;
1139                                 while (*p2)             /* calc # of /'s */
1140                                         if (*p2++ == '/')
1141                                                 updirs++;
1142                                 if (p[1] == '0') {      /* print <x> or ... */
1143                                         pdirs = 1;
1144                                         p++;
1145                                 }
1146                                 if (p[1] >= '1' && p[1] <= '9') {
1147                                                         /* calc # to skip  */
1148                                         skip = p[1] - '0';
1149                                         p++;
1150                                 } else
1151                                         skip = 1;
1152
1153                                 updirs -= skip;
1154                                 while (skip-- > 0) {
1155                                         while ((p2 > q) && (*p2 != '/'))
1156                                                 p2--;   /* back up */
1157                                         if (skip && p2 > q)
1158                                                 p2--;
1159                                 }
1160                                 if (*p2 == '/' && p2 != q)
1161                                         p2++;
1162                         }
1163
1164                         if (updirs > 0 && pdirs) {
1165                                 if (i >= len - 5)
1166                                         break;
1167                                 if (op == '.') {
1168                                         ADDBUF('.');
1169                                         ADDBUF('.');
1170                                         ADDBUF('.');
1171                                 } else {
1172                                         ADDBUF('/');
1173                                         ADDBUF('<');
1174                                         if (updirs > 9) {
1175                                                 ADDBUF('9');
1176                                                 ADDBUF('+');
1177                                         } else
1178                                                 ADDBUF('0' + updirs);
1179                                         ADDBUF('>');
1180                                 }
1181                         }
1182                         for (; *p2; p2++)
1183                                 ADDBUF(*p2);
1184                         break;
1185
1186                 case 'M':
1187                 case 'm':
1188                         for (p2 = connected && hostname ? hostname : "-";
1189                             *p2 ; p2++) {
1190                                 if (op == 'm' && *p2 == '.')
1191                                         break;
1192                                 ADDBUF(*p2);
1193                         }
1194                         break;
1195
1196                 case 'n':
1197                         for (p2 = connected ? username : "-"; *p2 ; p2++)
1198                                 ADDBUF(*p2);
1199                         break;
1200
1201                 case '%':
1202                         ADDBUF('%');
1203                         break;
1204
1205                 default:                /* display unknown codes literally */
1206                         ADDBUF('%');
1207                         ADDBUF(op);
1208                         break;
1209
1210                 }
1211         }
1212  endbuf:
1213         buf[i] = '\0';
1214 }
1215
1216 /*
1217  * Parse `port' into a TCP port number, defaulting to `defport' if `port' is
1218  * an unknown service name. If defport != -1, print a warning upon bad parse.
1219  */
1220 int
1221 parseport(const char *port, int defport)
1222 {
1223         int      rv;
1224         long     nport;
1225         char    *p, *ep;
1226
1227         p = ftp_strdup(port);
1228         nport = strtol(p, &ep, 10);
1229         if (*ep != '\0' && ep == p) {
1230                 struct servent  *svp;
1231
1232                 svp = getservbyname(port, "tcp");
1233                 if (svp == NULL) {
1234  badparseport:
1235                         if (defport != -1)
1236                                 warnx("Unknown port `%s', using port %d",
1237                                     port, defport);
1238                         rv = defport;
1239                 } else
1240                         rv = ntohs(svp->s_port);
1241         } else if (nport < 1 || nport > MAX_IN_PORT_T || *ep != '\0')
1242                 goto badparseport;
1243         else
1244                 rv = nport;
1245         free(p);
1246         return (rv);
1247 }
1248
1249 /*
1250  * Determine if given string is an IPv6 address or not.
1251  * Return 1 for yes, 0 for no
1252  */
1253 int
1254 isipv6addr(const char *addr)
1255 {
1256         int rv = 0;
1257 #ifdef INET6
1258         struct addrinfo hints, *res;
1259
1260         memset(&hints, 0, sizeof(hints));
1261         hints.ai_family = PF_INET6;
1262         hints.ai_socktype = SOCK_DGRAM; /*dummy*/
1263         hints.ai_flags = AI_NUMERICHOST;
1264         if (getaddrinfo(addr, "0", &hints, &res) != 0)
1265                 rv = 0;
1266         else {
1267                 rv = 1;
1268                 freeaddrinfo(res);
1269         }
1270         DPRINTF("isipv6addr: got %d for %s\n", rv, addr);
1271 #endif
1272         return (rv == 1) ? 1 : 0;
1273 }
1274
1275 /*
1276  * Read a line from the FILE stream into buf/buflen using fgets(), so up
1277  * to buflen-1 chars will be read and the result will be NUL terminated.
1278  * If the line has a trailing newline it will be removed.
1279  * If the line is too long, excess characters will be read until
1280  * newline/EOF/error.
1281  * If EOF/error occurs or a too-long line is encountered and errormsg
1282  * isn't NULL, it will be changed to a description of the problem.
1283  * (The EOF message has a leading \n for cosmetic purposes).
1284  * Returns:
1285  *      >=0     length of line (excluding trailing newline) if all ok
1286  *      -1      error occurred
1287  *      -2      EOF encountered
1288  *      -3      line was too long
1289  */
1290 int
1291 getline(FILE *stream, char *buf, size_t buflen, const char **errormsg)
1292 {
1293         int     rv, ch;
1294         size_t  len;
1295
1296         if (fgets(buf, buflen, stream) == NULL) {
1297                 if (feof(stream)) {     /* EOF */
1298                         rv = -2;
1299                         if (errormsg)
1300                                 *errormsg = "\nEOF received";
1301                 } else  {               /* error */
1302                         rv = -1;
1303                         if (errormsg)
1304                                 *errormsg = "Error encountered";
1305                 }
1306                 clearerr(stream);
1307                 return rv;
1308         }
1309         len = strlen(buf);
1310         if (buf[len-1] == '\n') {       /* clear any trailing newline */
1311                 buf[--len] = '\0';
1312         } else if (len == buflen-1) {   /* line too long */
1313                 while ((ch = getchar()) != '\n' && ch != EOF)
1314                         continue;
1315                 if (errormsg)
1316                         *errormsg = "Input line is too long";
1317                 clearerr(stream);
1318                 return -3;
1319         }
1320         if (errormsg)
1321                 *errormsg = NULL;
1322         return len;
1323 }
1324
1325 /*
1326  * Internal version of connect(2); sets socket buffer sizes,
1327  * binds to a specific local address (if set), and
1328  * supports a connection timeout using a non-blocking connect(2) with
1329  * a poll(2).
1330  * Socket fcntl flags are temporarily updated to include O_NONBLOCK;
1331  * these will not be reverted on connection failure.
1332  * Returns 0 on success, or -1 upon failure (with an appropriate
1333  * error message displayed.)
1334  */
1335 int
1336 ftp_connect(int sock, const struct sockaddr *name, socklen_t namelen)
1337 {
1338         int             flags, rv, timeout, error;
1339         socklen_t       slen;
1340         struct timeval  endtime, now, td;
1341         struct pollfd   pfd[1];
1342         char            hname[NI_MAXHOST];
1343
1344         setupsockbufsize(sock);
1345         if (getnameinfo(name, namelen,
1346             hname, sizeof(hname), NULL, 0, NI_NUMERICHOST) != 0)
1347                 strlcpy(hname, "?", sizeof(hname));
1348
1349         if (bindai != NULL) {                   /* bind to specific addr */
1350                 struct addrinfo *ai;
1351
1352                 for (ai = bindai; ai != NULL; ai = ai->ai_next) {
1353                         if (ai->ai_family == name->sa_family)
1354                                 break;
1355                 }
1356                 if (ai == NULL)
1357                         ai = bindai;
1358                 if (bind(sock, ai->ai_addr, ai->ai_addrlen) == -1) {
1359                         char    bname[NI_MAXHOST];
1360                         int     saveerr;
1361
1362                         saveerr = errno;
1363                         if (getnameinfo(ai->ai_addr, ai->ai_addrlen,
1364                             bname, sizeof(bname), NULL, 0, NI_NUMERICHOST) != 0)
1365                                 strlcpy(bname, "?", sizeof(bname));
1366                         errno = saveerr;
1367                         warn("Can't bind to `%s'", bname);
1368                         return -1;
1369                 }
1370         }
1371
1372                                                 /* save current socket flags */
1373         if ((flags = fcntl(sock, F_GETFL, 0)) == -1) {
1374                 warn("Can't %s socket flags for connect to `%s'",
1375                     "save", hname);
1376                 return -1;
1377         }
1378                                                 /* set non-blocking connect */
1379         if (fcntl(sock, F_SETFL, flags | O_NONBLOCK) == -1) {
1380                 warn("Can't set socket non-blocking for connect to `%s'",
1381                     hname);
1382                 return -1;
1383         }
1384
1385         /* NOTE: we now must restore socket flags on successful exit */
1386
1387         pfd[0].fd = sock;
1388         pfd[0].events = POLLIN|POLLOUT;
1389
1390         if (quit_time > 0) {                    /* want a non default timeout */
1391                 (void)gettimeofday(&endtime, NULL);
1392                 endtime.tv_sec += quit_time;    /* determine end time */
1393         }
1394
1395         rv = connect(sock, name, namelen);      /* inititate the connection */
1396         if (rv == -1) {                         /* connection error */
1397                 if (errno != EINPROGRESS) {     /* error isn't "please wait" */
1398  connecterror:
1399                         warn("Can't connect to `%s'", hname);
1400                         return -1;
1401                 }
1402
1403                                                 /* connect EINPROGRESS; wait */
1404                 do {
1405                         if (quit_time > 0) {    /* determine timeout */
1406                                 (void)gettimeofday(&now, NULL);
1407                                 timersub(&endtime, &now, &td);
1408                                 timeout = td.tv_sec * 1000 + td.tv_usec/1000;
1409                                 if (timeout < 0)
1410                                         timeout = 0;
1411                         } else {
1412                                 timeout = INFTIM;
1413                         }
1414                         pfd[0].revents = 0;
1415                         rv = ftp_poll(pfd, 1, timeout);
1416                                                 /* loop until poll ! EINTR */
1417                 } while (rv == -1 && errno == EINTR);
1418
1419                 if (rv == 0) {                  /* poll (connect) timed out */
1420                         errno = ETIMEDOUT;
1421                         goto connecterror;
1422                 }
1423
1424                 if (rv == -1) {                 /* poll error */
1425                         goto connecterror;
1426                 } else if (pfd[0].revents & (POLLIN|POLLOUT)) {
1427                         slen = sizeof(error);   /* OK, or pending error */
1428                         if (getsockopt(sock, SOL_SOCKET, SO_ERROR,
1429                             &error, &slen) == -1) {
1430                                                 /* Solaris pending error */
1431                                 goto connecterror;
1432                         } else if (error != 0) {
1433                                 errno = error;  /* BSD pending error */
1434                                 goto connecterror;
1435                         }
1436                 } else {
1437                         errno = EBADF;          /* this shouldn't happen ... */
1438                         goto connecterror;
1439                 }
1440         }
1441
1442         if (fcntl(sock, F_SETFL, flags) == -1) {
1443                                                 /* restore socket flags */
1444                 warn("Can't %s socket flags for connect to `%s'",
1445                     "restore", hname);
1446                 return -1;
1447         }
1448         return 0;
1449 }
1450
1451 /*
1452  * Internal version of listen(2); sets socket buffer sizes first.
1453  */
1454 int
1455 ftp_listen(int sock, int backlog)
1456 {
1457
1458         setupsockbufsize(sock);
1459         return (listen(sock, backlog));
1460 }
1461
1462 /*
1463  * Internal version of poll(2), to allow reimplementation by select(2)
1464  * on platforms without the former.
1465  */
1466 int
1467 ftp_poll(struct pollfd *fds, int nfds, int timeout)
1468 {
1469         return poll(fds, nfds, timeout);
1470 }
1471
1472 /*
1473  * malloc() with inbuilt error checking
1474  */
1475 void *
1476 ftp_malloc(size_t size)
1477 {
1478         void *p;
1479
1480         p = malloc(size);
1481         if (p == NULL)
1482                 err(1, "Unable to allocate %ld bytes of memory", (long)size);
1483         return (p);
1484 }
1485
1486 /*
1487  * sl_init() with inbuilt error checking
1488  */
1489 StringList *
1490 ftp_sl_init(void)
1491 {
1492         StringList *p;
1493
1494         p = sl_init();
1495         if (p == NULL)
1496                 err(1, "Unable to allocate memory for stringlist");
1497         return (p);
1498 }
1499
1500 /*
1501  * sl_add() with inbuilt error checking
1502  */
1503 void
1504 ftp_sl_add(StringList *sl, char *i)
1505 {
1506
1507         if (sl_add(sl, i) == -1)
1508                 err(1, "Unable to add `%s' to stringlist", i);
1509 }
1510
1511 /*
1512  * strdup() with inbuilt error checking
1513  */
1514 char *
1515 ftp_strdup(const char *str)
1516 {
1517         char *s;
1518
1519         if (str == NULL)
1520                 errx(1, "ftp_strdup: called with NULL argument");
1521         s = strdup(str);
1522         if (s == NULL)
1523                 err(1, "Unable to allocate memory for string copy");
1524         return (s);
1525 }