contrib/tnftp/main.c

   1 /*      $NetBSD: main.c,v 1.109 2008/05/10 00:05:31 skd Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1996-2008 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Luke Mewburn.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Copyright (c) 1985, 1989, 1993, 1994
  34  *      The Regents of the University of California.  All rights reserved.
  35  *
  36  * Redistribution and use in source and binary forms, with or without
  37  * modification, are permitted provided that the following conditions
  38  * are met:
  39  * 1. Redistributions of source code must retain the above copyright
  40  *    notice, this list of conditions and the following disclaimer.
  41  * 2. Redistributions in binary form must reproduce the above copyright
  42  *    notice, this list of conditions and the following disclaimer in the
  43  *    documentation and/or other materials provided with the distribution.
  44  * 3. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  */
  60
  61 /*
  62  * Copyright (C) 1997 and 1998 WIDE Project.
  63  * All rights reserved.
  64  *
  65  * Redistribution and use in source and binary forms, with or without
  66  * modification, are permitted provided that the following conditions
  67  * are met:
  68  * 1. Redistributions of source code must retain the above copyright
  69  *    notice, this list of conditions and the following disclaimer.
  70  * 2. Redistributions in binary form must reproduce the above copyright
  71  *    notice, this list of conditions and the following disclaimer in the
  72  *    documentation and/or other materials provided with the distribution.
  73  * 3. Neither the name of the project nor the names of its contributors
  74  *    may be used to endorse or promote products derived from this software
  75  *    without specific prior written permission.
  76  *
  77  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  78  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  79  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  80  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  81  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  82  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  83  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  84  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  85  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  86  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  87  * SUCH DAMAGE.
  88  */
  89
  90 #include <sys/cdefs.h>
  91 #ifndef lint
  92 __COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\n\
  93         The Regents of the University of California.  All rights reserved.\n");
  94 #endif /* not lint */
  95
  96 #ifndef lint
  97 #if 0
  98 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 10/9/94";
  99 #else
 100 __RCSID("$NetBSD: main.c,v 1.109 2008/05/10 00:05:31 skd Exp $");
 101 #endif
 102 #endif /* not lint */
 103
 104 /*
 105  * FTP User Program -- Command Interface.
 106  */
 107 #include <sys/types.h>
 108 #include <sys/socket.h>
 109
 110 #include <err.h>
 111 #include <errno.h>
 112 #include <netdb.h>
 113 #include <paths.h>
 114 #include <pwd.h>
 115 #include <signal.h>
 116 #include <stdio.h>
 117 #include <stdlib.h>
 118 #include <string.h>
 119 #include <time.h>
 120 #include <unistd.h>
 121 #include <locale.h>
 122
 123 #define GLOBAL          /* force GLOBAL decls in ftp_var.h to be declared */
 124 #include "ftp_var.h"
 125
 126 #define FTP_PROXY       "ftp_proxy"     /* env var with FTP proxy location */
 127 #define HTTP_PROXY      "http_proxy"    /* env var with HTTP proxy location */
 128 #define NO_PROXY        "no_proxy"      /* env var with list of non-proxied
 129                                          * hosts, comma or space separated */
 130
 131 static void     setupoption(char *, char *, char *);
 132 int             main(int, char *[]);
 133
 134 int
 135 main(int volatile argc, char **volatile argv)
 136 {
 137         int ch, rval;
 138         struct passwd *pw;
 139         char *cp, *ep, *anonuser, *anonpass, *upload_path, *src_addr;
 140         int dumbterm, s, isupload;
 141         size_t len;
 142         socklen_t slen;
 143
 144         tzset();
 145         setlocale(LC_ALL, "");
 146         setprogname(argv[0]);
 147
 148         sigint_raised = 0;
 149
 150         ftpport = "ftp";
 151         httpport = "http";
 152         gateport = NULL;
 153         cp = getenv("FTPSERVERPORT");
 154         if (cp != NULL)
 155                 gateport = cp;
 156         else
 157                 gateport = "ftpgate";
 158         doglob = 1;
 159         interactive = 1;
 160         autologin = 1;
 161         passivemode = 1;
 162         activefallback = 1;
 163         preserve = 1;
 164         verbose = 0;
 165         progress = 0;
 166         gatemode = 0;
 167         data = -1;
 168         outfile = NULL;
 169         restartautofetch = 0;
 170 #ifndef NO_EDITCOMPLETE
 171         editing = 0;
 172         el = NULL;
 173         hist = NULL;
 174 #endif
 175         bytes = 0;
 176         mark = HASHBYTES;
 177         rate_get = 0;
 178         rate_get_incr = DEFAULTINCR;
 179         rate_put = 0;
 180         rate_put_incr = DEFAULTINCR;
 181 #ifdef INET6
 182         epsv4 = 1;
 183         epsv6 = 1;
 184 #else
 185         epsv4 = 0;
 186         epsv6 = 0;
 187 #endif
 188         epsv4bad = 0;
 189         epsv6bad = 0;
 190         src_addr = NULL;
 191         upload_path = NULL;
 192         isupload = 0;
 193         reply_callback = NULL;
 194         family = AF_UNSPEC;
 195
 196         netrc[0] = '\0';
 197         cp = getenv("NETRC");
 198         if (cp != NULL && strlcpy(netrc, cp, sizeof(netrc)) >= sizeof(netrc))
 199                 errx(1, "$NETRC `%s': %s", cp, strerror(ENAMETOOLONG));
 200
 201         /*
 202          * Get the default socket buffer sizes if we don't already have them.
 203          * It doesn't matter which socket we do this to, because on the first
 204          * call no socket buffer sizes will have been modified, so we are
 205          * guaranteed to get the system defaults.
 206          */
 207         s = socket(AF_INET, SOCK_STREAM, 0);
 208         if (s == -1)
 209                 err(1, "Can't create socket to determine default socket sizes");
 210         slen = sizeof(rcvbuf_size);
 211         if (getsockopt(s, SOL_SOCKET, SO_RCVBUF,
 212             (void *)&rcvbuf_size, &slen) == -1)
 213                 err(1, "Unable to get default rcvbuf size");
 214         slen = sizeof(sndbuf_size);
 215         if (getsockopt(s, SOL_SOCKET, SO_SNDBUF,
 216             (void *)&sndbuf_size, &slen) == -1)
 217                 err(1, "Unable to get default sndbuf size");
 218         (void)close(s);
 219                                         /* sanity check returned buffer sizes */
 220         if (rcvbuf_size <= 0)
 221                 rcvbuf_size = 8 * 1024;
 222         if (sndbuf_size <= 0)
 223                 sndbuf_size = 8 * 1024;
 224
 225         if (sndbuf_size > 8 * 1024 * 1024)
 226                 sndbuf_size = 8 * 1024 * 1024;
 227         if (rcvbuf_size > 8 * 1024 * 1024)
 228                 rcvbuf_size = 8 * 1024 * 1024;
 229
 230         marg_sl = ftp_sl_init();
 231         if ((tmpdir = getenv("TMPDIR")) == NULL)
 232                 tmpdir = _PATH_TMP;
 233
 234         /* Set default operation mode based on FTPMODE environment variable */
 235         if ((cp = getenv("FTPMODE")) != NULL) {
 236                 if (strcasecmp(cp, "passive") == 0) {
 237                         passivemode = 1;
 238                         activefallback = 0;
 239                 } else if (strcasecmp(cp, "active") == 0) {
 240                         passivemode = 0;
 241                         activefallback = 0;
 242                 } else if (strcasecmp(cp, "gate") == 0) {
 243                         gatemode = 1;
 244                 } else if (strcasecmp(cp, "auto") == 0) {
 245                         passivemode = 1;
 246                         activefallback = 1;
 247                 } else
 248                         warnx("Unknown $FTPMODE `%s'; using defaults", cp);
 249         }
 250
 251         if (strcmp(getprogname(), "pftp") == 0) {
 252                 passivemode = 1;
 253                 activefallback = 0;
 254         } else if (strcmp(getprogname(), "gate-ftp") == 0)
 255                 gatemode = 1;
 256
 257         gateserver = getenv("FTPSERVER");
 258         if (gateserver == NULL || *gateserver == '\0')
 259                 gateserver = GATE_SERVER;
 260         if (gatemode) {
 261                 if (*gateserver == '\0') {
 262                         warnx(
 263 "Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp");
 264                         gatemode = 0;
 265                 }
 266         }
 267
 268         cp = getenv("TERM");
 269         if (cp == NULL || strcmp(cp, "dumb") == 0)
 270                 dumbterm = 1;
 271         else
 272                 dumbterm = 0;
 273         fromatty = isatty(fileno(stdin));
 274         ttyout = stdout;
 275         if (isatty(fileno(ttyout))) {
 276                 verbose = 1;            /* verbose if to a tty */
 277                 if (! dumbterm) {
 278 #ifndef NO_EDITCOMPLETE
 279                         if (fromatty)   /* editing mode on if tty is usable */
 280                                 editing = 1;
 281 #endif
 282 #ifndef NO_PROGRESS
 283                         if (foregroundproc())
 284                                 progress = 1;   /* progress bar on if fg */
 285 #endif
 286                 }
 287         }
 288
 289         while ((ch = getopt(argc, argv, "46AadefginN:o:pP:q:r:Rs:tT:u:vV")) != -1) {
 290                 switch (ch) {
 291                 case '4':
 292                         family = AF_INET;
 293                         break;
 294
 295                 case '6':
 296 #ifdef INET6
 297                         family = AF_INET6;
 298 #else
 299                         warnx("INET6 support is not available; ignoring -6");
 300 #endif
 301                         break;
 302
 303                 case 'A':
 304                         activefallback = 0;
 305                         passivemode = 0;
 306                         break;
 307
 308                 case 'a':
 309                         anonftp = 1;
 310                         break;
 311
 312                 case 'd':
 313                         options |= SO_DEBUG;
 314                         ftp_debug++;
 315                         break;
 316
 317                 case 'e':
 318 #ifndef NO_EDITCOMPLETE
 319                         editing = 0;
 320 #endif
 321                         break;
 322
 323                 case 'f':
 324                         flushcache = 1;
 325                         break;
 326
 327                 case 'g':
 328                         doglob = 0;
 329                         break;
 330
 331                 case 'i':
 332                         interactive = 0;
 333                         break;
 334
 335                 case 'n':
 336                         autologin = 0;
 337                         break;
 338
 339                 case 'N':
 340                         if (strlcpy(netrc, optarg, sizeof(netrc))
 341                             >= sizeof(netrc))
 342                                 errx(1, "%s: %s", optarg,
 343                                     strerror(ENAMETOOLONG));
 344                         break;
 345
 346                 case 'o':
 347                         outfile = optarg;
 348                         if (strcmp(outfile, "-") == 0)
 349                                 ttyout = stderr;
 350                         break;
 351
 352                 case 'p':
 353                         passivemode = 1;
 354                         activefallback = 0;
 355                         break;
 356
 357                 case 'P':
 358                         ftpport = optarg;
 359                         break;
 360
 361                 case 'q':
 362                         quit_time = strtol(optarg, &ep, 10);
 363                         if (quit_time < 1 || *ep != '\0')
 364                                 errx(1, "Bad quit value: %s", optarg);
 365                         break;
 366
 367                 case 'r':
 368                         retry_connect = strtol(optarg, &ep, 10);
 369                         if (retry_connect < 1 || *ep != '\0')
 370                                 errx(1, "Bad retry value: %s", optarg);
 371                         break;
 372
 373                 case 'R':
 374                         restartautofetch = 1;
 375                         break;
 376
 377                 case 's':
 378                         src_addr = optarg;
 379                         break;
 380
 381                 case 't':
 382                         trace = 1;
 383                         break;
 384
 385                 case 'T':
 386                 {
 387                         int targc;
 388                         char *targv[6], *oac;
 389
 390                                 /* look for `dir,max[,incr]' */
 391                         targc = 0;
 392                         targv[targc++] = "-T";
 393                         oac = ftp_strdup(optarg);
 394
 395                         while ((cp = strsep(&oac, ",")) != NULL) {
 396                                 if (*cp == '\0') {
 397                                         warnx("Bad throttle value `%s'",
 398                                             optarg);
 399                                         usage();
 400                                         /* NOTREACHED */
 401                                 }
 402                                 targv[targc++] = cp;
 403                                 if (targc >= 5)
 404                                         break;
 405                         }
 406                         if (parserate(targc, targv, 1) == -1)
 407                                 usage();
 408                         free(oac);
 409                         break;
 410                 }
 411
 412                 case 'u':
 413                 {
 414                         isupload = 1;
 415                         interactive = 0;
 416                         upload_path = ftp_strdup(optarg);
 417
 418                         break;
 419                 }
 420
 421                 case 'v':
 422                         progress = verbose = 1;
 423                         break;
 424
 425                 case 'V':
 426                         progress = verbose = 0;
 427                         break;
 428
 429                 default:
 430                         usage();
 431                 }
 432         }
 433                         /* set line buffering on ttyout */
 434         setvbuf(ttyout, NULL, _IOLBF, 0);
 435         argc -= optind;
 436         argv += optind;
 437
 438         cpend = 0;      /* no pending replies */
 439         proxy = 0;      /* proxy not active */
 440         crflag = 1;     /* strip c.r. on ascii gets */
 441         sendport = -1;  /* not using ports */
 442
 443         if (src_addr != NULL) {
 444                 struct addrinfo hints;
 445                 int error;
 446
 447                 memset(&hints, 0, sizeof(hints));
 448                 hints.ai_family = family;
 449                 hints.ai_socktype = SOCK_STREAM;
 450                 hints.ai_flags = AI_PASSIVE;
 451                 error = getaddrinfo(src_addr, NULL, &hints, &bindai);
 452                 if (error) {
 453                         errx(1, "Can't lookup `%s': %s", src_addr,
 454                             (error == EAI_SYSTEM) ? strerror(errno)
 455                                                   : gai_strerror(error));
 456                 }
 457         }
 458
 459         /*
 460          * Cache the user name and home directory.
 461          */
 462         localhome = NULL;
 463         localname = NULL;
 464         anonuser = "anonymous";
 465         cp = getenv("HOME");
 466         if (! EMPTYSTRING(cp))
 467                 localhome = ftp_strdup(cp);
 468         pw = NULL;
 469         cp = getlogin();
 470         if (cp != NULL)
 471                 pw = getpwnam(cp);
 472         if (pw == NULL)
 473                 pw = getpwuid(getuid());
 474         if (pw != NULL) {
 475                 if (localhome == NULL && !EMPTYSTRING(pw->pw_dir))
 476                         localhome = ftp_strdup(pw->pw_dir);
 477                 localname = ftp_strdup(pw->pw_name);
 478                 anonuser = localname;
 479         }
 480         if (netrc[0] == '\0' && localhome != NULL) {
 481                 if (strlcpy(netrc, localhome, sizeof(netrc)) >= sizeof(netrc) ||
 482                     strlcat(netrc, "/.netrc", sizeof(netrc)) >= sizeof(netrc)) {
 483                         warnx("%s/.netrc: %s", localhome,
 484                             strerror(ENAMETOOLONG));
 485                         netrc[0] = '\0';
 486                 }
 487         }
 488         if (localhome == NULL)
 489                 localhome = ftp_strdup("/");
 490
 491         /*
 492          * Every anonymous FTP server I've encountered will accept the
 493          * string "username@", and will append the hostname itself. We
 494          * do this by default since many servers are picky about not
 495          * having a FQDN in the anonymous password.
 496          * - thorpej@NetBSD.org
 497          */
 498         len = strlen(anonuser) + 2;
 499         anonpass = ftp_malloc(len);
 500         (void)strlcpy(anonpass, anonuser, len);
 501         (void)strlcat(anonpass, "@",      len);
 502
 503                         /*
 504                          * set all the defaults for options defined in
 505                          * struct option optiontab[]  declared in cmdtab.c
 506                          */
 507         setupoption("anonpass",         getenv("FTPANONPASS"),  anonpass);
 508         setupoption("ftp_proxy",        getenv(FTP_PROXY),      "");
 509         setupoption("http_proxy",       getenv(HTTP_PROXY),     "");
 510         setupoption("no_proxy",         getenv(NO_PROXY),       "");
 511         setupoption("pager",            getenv("PAGER"),        DEFAULTPAGER);
 512         setupoption("prompt",           getenv("FTPPROMPT"),    DEFAULTPROMPT);
 513         setupoption("rprompt",          getenv("FTPRPROMPT"),   DEFAULTRPROMPT);
 514
 515         free(anonpass);
 516
 517         setttywidth(0);
 518 #ifdef SIGINFO
 519         (void)xsignal(SIGINFO, psummary);
 520 #endif
 521         (void)xsignal(SIGQUIT, psummary);
 522         (void)xsignal(SIGUSR1, crankrate);
 523         (void)xsignal(SIGUSR2, crankrate);
 524         (void)xsignal(SIGWINCH, setttywidth);
 525
 526         if (argc > 0) {
 527                 if (isupload) {
 528                         rval = auto_put(argc, argv, upload_path);
 529  sigint_or_rval_exit:
 530                         if (sigint_raised) {
 531                                 (void)xsignal(SIGINT, SIG_DFL);
 532                                 raise(SIGINT);
 533                         }
 534                         exit(rval);
 535                 } else if (strchr(argv[0], ':') != NULL
 536                             && ! isipv6addr(argv[0])) {
 537                         rval = auto_fetch(argc, argv);
 538                         if (rval >= 0)          /* -1 == connected and cd-ed */
 539                                 goto sigint_or_rval_exit;
 540                 } else {
 541                         char *xargv[4], *user, *host;
 542
 543                         if ((rval = sigsetjmp(toplevel, 1)))
 544                                 goto sigint_or_rval_exit;
 545                         (void)xsignal(SIGINT, intr);
 546                         (void)xsignal(SIGPIPE, lostpeer);
 547                         user = NULL;
 548                         host = argv[0];
 549                         cp = strchr(host, '@');
 550                         if (cp) {
 551                                 *cp = '\0';
 552                                 user = host;
 553                                 host = cp + 1;
 554                         }
 555                         /* XXX discards const */
 556                         xargv[0] = (char *)getprogname();
 557                         xargv[1] = host;
 558                         xargv[2] = argv[1];
 559                         xargv[3] = NULL;
 560                         do {
 561                                 int oautologin;
 562
 563                                 oautologin = autologin;
 564                                 if (user != NULL) {
 565                                         anonftp = 0;
 566                                         autologin = 0;
 567                                 }
 568                                 setpeer(argc+1, xargv);
 569                                 autologin = oautologin;
 570                                 if (connected == 1 && user != NULL)
 571                                         (void)ftp_login(host, user, NULL);
 572                                 if (!retry_connect)
 573                                         break;
 574                                 if (!connected) {
 575                                         macnum = 0;
 576                                         fprintf(ttyout,
 577                                             "Retrying in %d seconds...\n",
 578                                             retry_connect);
 579                                         sleep(retry_connect);
 580                                 }
 581                         } while (!connected);
 582                         retry_connect = 0; /* connected, stop hiding msgs */
 583                 }
 584         }
 585         if (isupload)
 586                 usage();
 587
 588 #ifndef NO_EDITCOMPLETE
 589         controlediting();
 590 #endif /* !NO_EDITCOMPLETE */
 591
 592         (void)sigsetjmp(toplevel, 1);
 593         (void)xsignal(SIGINT, intr);
 594         (void)xsignal(SIGPIPE, lostpeer);
 595         for (;;)
 596                 cmdscanner();
 597 }
 598
 599 /*
 600  * Generate a prompt
 601  */
 602 char *
 603 prompt(void)
 604 {
 605         static char     **prompt;
 606         static char       buf[MAXPATHLEN];
 607
 608         if (prompt == NULL) {
 609                 struct option *o;
 610
 611                 o = getoption("prompt");
 612                 if (o == NULL)
 613                         errx(1, "prompt: no such option `prompt'");
 614                 prompt = &(o->value);
 615         }
 616         formatbuf(buf, sizeof(buf), *prompt ? *prompt : DEFAULTPROMPT);
 617         return (buf);
 618 }
 619
 620 /*
 621  * Generate an rprompt
 622  */
 623 char *
 624 rprompt(void)
 625 {
 626         static char     **rprompt;
 627         static char       buf[MAXPATHLEN];
 628
 629         if (rprompt == NULL) {
 630                 struct option *o;
 631
 632                 o = getoption("rprompt");
 633                 if (o == NULL)
 634                         errx(1, "rprompt: no such option `rprompt'");
 635                 rprompt = &(o->value);
 636         }
 637         formatbuf(buf, sizeof(buf), *rprompt ? *rprompt : DEFAULTRPROMPT);
 638         return (buf);
 639 }
 640
 641 /*
 642  * Command parser.
 643  */
 644 void
 645 cmdscanner(void)
 646 {
 647         struct cmd      *c;
 648         char            *p;
 649 #ifndef NO_EDITCOMPLETE
 650         int              ch;
 651 #endif
 652         size_t           num;
 653
 654         for (;;) {
 655 #ifndef NO_EDITCOMPLETE
 656                 if (!editing) {
 657 #endif /* !NO_EDITCOMPLETE */
 658                         if (fromatty) {
 659                                 fputs(prompt(), ttyout);
 660                                 p = rprompt();
 661                                 if (*p)
 662                                         fprintf(ttyout, "%s ", p);
 663                         }
 664                         (void)fflush(ttyout);
 665                         num = getline(stdin, line, sizeof(line), NULL);
 666                         switch (num) {
 667                         case -1:        /* EOF */
 668                         case -2:        /* error */
 669                                 if (fromatty)
 670                                         putc('\n', ttyout);
 671                                 quit(0, NULL);
 672                                 /* NOTREACHED */
 673                         case -3:        /* too long; try again */
 674                                 fputs("Sorry, input line is too long.\n",
 675                                     ttyout);
 676                                 continue;
 677                         case 0:         /* empty; try again */
 678                                 continue;
 679                         default:        /* all ok */
 680                                 break;
 681                         }
 682 #ifndef NO_EDITCOMPLETE
 683                 } else {
 684                         const char *buf;
 685                         HistEvent ev;
 686                         cursor_pos = NULL;
 687
 688                         buf = el_gets(el, &ch);
 689                         num = ch;
 690                         if (buf == NULL || num == 0) {
 691                                 if (fromatty)
 692                                         putc('\n', ttyout);
 693                                 quit(0, NULL);
 694                         }
 695                         if (num >= sizeof(line)) {
 696                                 fputs("Sorry, input line is too long.\n",
 697                                     ttyout);
 698                                 break;
 699                         }
 700                         memcpy(line, buf, num);
 701                         if (line[--num] == '\n') {
 702                                 line[num] = '\0';
 703                                 if (num == 0)
 704                                         break;
 705                         }
 706                         history(hist, &ev, H_ENTER, buf);
 707                 }
 708 #endif /* !NO_EDITCOMPLETE */
 709
 710                 makeargv();
 711                 if (margc == 0)
 712                         continue;
 713                 c = getcmd(margv[0]);
 714                 if (c == (struct cmd *)-1) {
 715                         fputs("?Ambiguous command.\n", ttyout);
 716                         continue;
 717                 }
 718                 if (c == NULL) {
 719 #if !defined(NO_EDITCOMPLETE)
 720                         /*
 721                          * attempt to el_parse() unknown commands.
 722                          * any command containing a ':' would be parsed
 723                          * as "[prog:]cmd ...", and will result in a
 724                          * false positive if prog != "ftp", so treat
 725                          * such commands as invalid.
 726                          */
 727                         if (strchr(margv[0], ':') != NULL ||
 728                             !editing ||
 729                             el_parse(el, margc, (const char **)margv) != 0)
 730 #endif /* !NO_EDITCOMPLETE */
 731                                 fputs("?Invalid command.\n", ttyout);
 732                         continue;
 733                 }
 734                 if (c->c_conn && !connected) {
 735                         fputs("Not connected.\n", ttyout);
 736                         continue;
 737                 }
 738                 confirmrest = 0;
 739                 margv[0] = c->c_name;
 740                 (*c->c_handler)(margc, margv);
 741                 if (bell && c->c_bell)
 742                         (void)putc('\007', ttyout);
 743                 if (c->c_handler != help)
 744                         break;
 745         }
 746         (void)xsignal(SIGINT, intr);
 747         (void)xsignal(SIGPIPE, lostpeer);
 748 }
 749
 750 struct cmd *
 751 getcmd(const char *name)
 752 {
 753         const char *p, *q;
 754         struct cmd *c, *found;
 755         int nmatches, longest;
 756
 757         if (name == NULL)
 758                 return (0);
 759
 760         longest = 0;
 761         nmatches = 0;
 762         found = 0;
 763         for (c = cmdtab; (p = c->c_name) != NULL; c++) {
 764                 for (q = name; *q == *p++; q++)
 765                         if (*q == 0)            /* exact match? */
 766                                 return (c);
 767                 if (!*q) {                      /* the name was a prefix */
 768                         if (q - name > longest) {
 769                                 longest = q - name;
 770                                 nmatches = 1;
 771                                 found = c;
 772                         } else if (q - name == longest)
 773                                 nmatches++;
 774                 }
 775         }
 776         if (nmatches > 1)
 777                 return ((struct cmd *)-1);
 778         return (found);
 779 }
 780
 781 /*
 782  * Slice a string up into argc/argv.
 783  */
 784
 785 int slrflag;
 786
 787 void
 788 makeargv(void)
 789 {
 790         char *argp;
 791
 792         stringbase = line;              /* scan from first of buffer */
 793         argbase = argbuf;               /* store from first of buffer */
 794         slrflag = 0;
 795         marg_sl->sl_cur = 0;            /* reset to start of marg_sl */
 796         for (margc = 0; ; margc++) {
 797                 argp = slurpstring();
 798                 ftp_sl_add(marg_sl, argp);
 799                 if (argp == NULL)
 800                         break;
 801         }
 802 #ifndef NO_EDITCOMPLETE
 803         if (cursor_pos == line) {
 804                 cursor_argc = 0;
 805                 cursor_argo = 0;
 806         } else if (cursor_pos != NULL) {
 807                 cursor_argc = margc;
 808                 cursor_argo = strlen(margv[margc-1]);
 809         }
 810 #endif /* !NO_EDITCOMPLETE */
 811 }
 812
 813 #ifdef NO_EDITCOMPLETE
 814 #define INC_CHKCURSOR(x)        (x)++
 815 #else  /* !NO_EDITCOMPLETE */
 816 #define INC_CHKCURSOR(x)        { (x)++ ; \
 817                                 if (x == cursor_pos) { \
 818                                         cursor_argc = margc; \
 819                                         cursor_argo = ap-argbase; \
 820                                         cursor_pos = NULL; \
 821                                 } }
 822
 823 #endif /* !NO_EDITCOMPLETE */
 824
 825 /*
 826  * Parse string into argbuf;
 827  * implemented with FSM to
 828  * handle quoting and strings
 829  */
 830 char *
 831 slurpstring(void)
 832 {
 833         int got_one = 0;
 834         char *sb = stringbase;
 835         char *ap = argbase;
 836         char *tmp = argbase;            /* will return this if token found */
 837
 838         if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */
 839                 switch (slrflag) {      /* and $ as token for macro invoke */
 840                         case 0:
 841                                 slrflag++;
 842                                 INC_CHKCURSOR(stringbase);
 843                                 return ((*sb == '!') ? "!" : "$");
 844                                 /* NOTREACHED */
 845                         case 1:
 846                                 slrflag++;
 847                                 altarg = stringbase;
 848                                 break;
 849                         default:
 850                                 break;
 851                 }
 852         }
 853
 854 S0:
 855         switch (*sb) {
 856
 857         case '\0':
 858                 goto OUT;
 859
 860         case ' ':
 861         case '\t':
 862                 INC_CHKCURSOR(sb);
 863                 goto S0;
 864
 865         default:
 866                 switch (slrflag) {
 867                         case 0:
 868                                 slrflag++;
 869                                 break;
 870                         case 1:
 871                                 slrflag++;
 872                                 altarg = sb;
 873                                 break;
 874                         default:
 875                                 break;
 876                 }
 877                 goto S1;
 878         }
 879
 880 S1:
 881         switch (*sb) {
 882
 883         case ' ':
 884         case '\t':
 885         case '\0':
 886                 goto OUT;       /* end of token */
 887
 888         case '\\':
 889                 INC_CHKCURSOR(sb);
 890                 goto S2;        /* slurp next character */
 891
 892         case '"':
 893                 INC_CHKCURSOR(sb);
 894                 goto S3;        /* slurp quoted string */
 895
 896         default:
 897                 *ap = *sb;      /* add character to token */
 898                 ap++;
 899                 INC_CHKCURSOR(sb);
 900                 got_one = 1;
 901                 goto S1;
 902         }
 903
 904 S2:
 905         switch (*sb) {
 906
 907         case '\0':
 908                 goto OUT;
 909
 910         default:
 911                 *ap = *sb;
 912                 ap++;
 913                 INC_CHKCURSOR(sb);
 914                 got_one = 1;
 915                 goto S1;
 916         }
 917
 918 S3:
 919         switch (*sb) {
 920
 921         case '\0':
 922                 goto OUT;
 923
 924         case '"':
 925                 INC_CHKCURSOR(sb);
 926                 goto S1;
 927
 928         default:
 929                 *ap = *sb;
 930                 ap++;
 931                 INC_CHKCURSOR(sb);
 932                 got_one = 1;
 933                 goto S3;
 934         }
 935
 936 OUT:
 937         if (got_one)
 938                 *ap++ = '\0';
 939         argbase = ap;                   /* update storage pointer */
 940         stringbase = sb;                /* update scan pointer */
 941         if (got_one) {
 942                 return (tmp);
 943         }
 944         switch (slrflag) {
 945                 case 0:
 946                         slrflag++;
 947                         break;
 948                 case 1:
 949                         slrflag++;
 950                         altarg = NULL;
 951                         break;
 952                 default:
 953                         break;
 954         }
 955         return (NULL);
 956 }
 957
 958 /*
 959  * Help/usage command.
 960  * Call each command handler with argc == 0 and argv[0] == name.
 961  */
 962 void
 963 help(int argc, char *argv[])
 964 {
 965         struct cmd *c;
 966         char *nargv[1], *p, *cmd;
 967         int isusage;
 968
 969         cmd = argv[0];
 970         isusage = (strcmp(cmd, "usage") == 0);
 971         if (argc == 0 || (isusage && argc == 1)) {
 972                 UPRINTF("usage: %s [command [...]]\n", cmd);
 973                 return;
 974         }
 975         if (argc == 1) {
 976                 StringList *buf;
 977
 978                 buf = ftp_sl_init();
 979                 fprintf(ttyout,
 980                     "%sommands may be abbreviated.  Commands are:\n\n",
 981                     proxy ? "Proxy c" : "C");
 982                 for (c = cmdtab; (p = c->c_name) != NULL; c++)
 983                         if (!proxy || c->c_proxy)
 984                                 ftp_sl_add(buf, p);
 985                 list_vertical(buf);
 986                 sl_free(buf, 0);
 987                 return;
 988         }
 989
 990 #define HELPINDENT ((int) sizeof("disconnect"))
 991
 992         while (--argc > 0) {
 993                 char *arg;
 994
 995                 arg = *++argv;
 996                 c = getcmd(arg);
 997                 if (c == (struct cmd *)-1)
 998                         fprintf(ttyout, "?Ambiguous %s command `%s'\n",
 999                             cmd, arg);
1000                 else if (c == NULL)
1001                         fprintf(ttyout, "?Invalid %s command `%s'\n",
1002                             cmd, arg);
1003                 else {
1004                         if (isusage) {
1005                                 nargv[0] = c->c_name;
1006                                 (*c->c_handler)(0, nargv);
1007                         } else
1008                                 fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
1009                                     c->c_name, c->c_help);
1010                 }
1011         }
1012 }
1013
1014 struct option *
1015 getoption(const char *name)
1016 {
1017         const char *p;
1018         struct option *c;
1019
1020         if (name == NULL)
1021                 return (NULL);
1022         for (c = optiontab; (p = c->name) != NULL; c++) {
1023                 if (strcasecmp(p, name) == 0)
1024                         return (c);
1025         }
1026         return (NULL);
1027 }
1028
1029 char *
1030 getoptionvalue(const char *name)
1031 {
1032         struct option *c;
1033
1034         if (name == NULL)
1035                 errx(1, "getoptionvalue: invoked with NULL name");
1036         c = getoption(name);
1037         if (c != NULL)
1038                 return (c->value);
1039         errx(1, "getoptionvalue: invoked with unknown option `%s'", name);
1040         /* NOTREACHED */
1041 }
1042
1043 static void
1044 setupoption(char *name, char *value, char *defaultvalue)
1045 {
1046         char *nargv[3];
1047         int overbose;
1048
1049         nargv[0] = "setupoption()";
1050         nargv[1] = name;
1051         nargv[2] = (value ? value : defaultvalue);
1052         overbose = verbose;
1053         verbose = 0;
1054         setoption(3, nargv);
1055         verbose = overbose;
1056 }
1057
1058 void
1059 usage(void)
1060 {
1061         const char *progname = getprogname();
1062
1063         (void)fprintf(stderr,
1064 "usage: %s [-46AadefginpRtVv] [-N netrc] [-o outfile] [-P port] [-q quittime]\n"
1065 "           [-r retry] [-s srcaddr] [-T dir,max[,inc]]\n"
1066 "           [[user@]host [port]] [host:path[/]] [file:///file]\n"
1067 "           [ftp://[user[:pass]@]host[:port]/path[/]]\n"
1068 "           [http://[user[:pass]@]host[:port]/path] [...]\n"
1069 "       %s -u URL file [...]\n", progname, progname);
1070         exit(1);
1071 }