usr.bin/ftp/main.c

   1 /*      $NetBSD: main.c,v 1.116 2009/04/24 08:57:26 lukem Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1996-2009 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Luke Mewburn.
   9  *
  10  * 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\
  93  The Regents of the University of California.  All rights reserved.\
  94   Copyright 1996-2008 The NetBSD Foundation, Inc.  All rights reserved");
  95 #endif /* not lint */
  96
  97 #ifndef lint
  98 #if 0
  99 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 10/9/94";
 100 #else
 101 __RCSID("$NetBSD: main.c,v 1.116 2009/04/24 08:57:26 lukem Exp $");
 102 #endif
 103 #endif /* not lint */
 104
 105 /*
 106  * FTP User Program -- Command Interface.
 107  */
 108 #include <sys/types.h>
 109 #include <sys/socket.h>
 110
 111 #include <err.h>
 112 #include <errno.h>
 113 #include <netdb.h>
 114 #include <paths.h>
 115 #include <pwd.h>
 116 #include <signal.h>
 117 #include <stdio.h>
 118 #include <stdlib.h>
 119 #include <string.h>
 120 #include <time.h>
 121 #include <unistd.h>
 122 #include <locale.h>
 123
 124 #define GLOBAL          /* force GLOBAL decls in ftp_var.h to be declared */
 125 #include "ftp_var.h"
 126
 127 #define FTP_PROXY       "ftp_proxy"     /* env var with FTP proxy location */
 128 #define HTTP_PROXY      "http_proxy"    /* env var with HTTP proxy location */
 129 #define NO_PROXY        "no_proxy"      /* env var with list of non-proxied
 130                                          * hosts, comma or space separated */
 131
 132 static void     setupoption(const char *, const char *, const char *);
 133 int             main(int, char *[]);
 134
 135 int
 136 main(int volatile argc, char **volatile argv)
 137 {
 138         int ch, rval;
 139         struct passwd *pw;
 140         char *cp, *ep, *anonpass, *upload_path, *src_addr;
 141         const char *anonuser;
 142         int dumbterm, s, isupload;
 143         size_t len;
 144         socklen_t slen;
 145
 146         tzset();
 147         setlocale(LC_ALL, "");
 148         setprogname(argv[0]);
 149
 150         sigint_raised = 0;
 151
 152         ftpport = "ftp";
 153         httpport = "http";
 154         gateport = NULL;
 155         cp = getenv("FTPSERVERPORT");
 156         if (cp != NULL)
 157                 gateport = cp;
 158         else
 159                 gateport = "ftpgate";
 160         doglob = 1;
 161         interactive = 1;
 162         autologin = 1;
 163         passivemode = 1;
 164         activefallback = 1;
 165         preserve = 1;
 166         verbose = 0;
 167         progress = 0;
 168         gatemode = 0;
 169         data = -1;
 170         outfile = NULL;
 171         restartautofetch = 0;
 172 #ifndef NO_EDITCOMPLETE
 173         editing = 0;
 174         el = NULL;
 175         hist = NULL;
 176 #endif
 177         bytes = 0;
 178         mark = HASHBYTES;
 179         rate_get = 0;
 180         rate_get_incr = DEFAULTINCR;
 181         rate_put = 0;
 182         rate_put_incr = DEFAULTINCR;
 183 #ifdef INET6
 184         epsv4 = 1;
 185         epsv6 = 1;
 186 #else
 187         epsv4 = 0;
 188         epsv6 = 0;
 189 #endif
 190         epsv4bad = 0;
 191         epsv6bad = 0;
 192         src_addr = NULL;
 193         upload_path = NULL;
 194         isupload = 0;
 195         reply_callback = NULL;
 196 #ifdef INET6
 197         family = AF_UNSPEC;
 198 #else
 199         family = AF_INET;       /* force AF_INET if no INET6 support */
 200 #endif
 201
 202         netrc[0] = '\0';
 203         cp = getenv("NETRC");
 204         if (cp != NULL && strlcpy(netrc, cp, sizeof(netrc)) >= sizeof(netrc))
 205                 errx(1, "$NETRC `%s': %s", cp, strerror(ENAMETOOLONG));
 206
 207         /*
 208          * Get the default socket buffer sizes if we don't already have them.
 209          * It doesn't matter which socket we do this to, because on the first
 210          * call no socket buffer sizes will have been modified, so we are
 211          * guaranteed to get the system defaults.
 212          */
 213         s = socket(AF_INET, SOCK_STREAM, 0);
 214         if (s == -1)
 215                 err(1, "Can't create socket to determine default socket sizes");
 216         slen = sizeof(rcvbuf_size);
 217         if (getsockopt(s, SOL_SOCKET, SO_RCVBUF,
 218             (void *)&rcvbuf_size, &slen) == -1)
 219                 err(1, "Unable to get default rcvbuf size");
 220         slen = sizeof(sndbuf_size);
 221         if (getsockopt(s, SOL_SOCKET, SO_SNDBUF,
 222             (void *)&sndbuf_size, &slen) == -1)
 223                 err(1, "Unable to get default sndbuf size");
 224         (void)close(s);
 225                                         /* sanity check returned buffer sizes */
 226         if (rcvbuf_size <= 0)
 227                 rcvbuf_size = 8 * 1024;
 228         if (sndbuf_size <= 0)
 229                 sndbuf_size = 8 * 1024;
 230
 231         if (sndbuf_size > 8 * 1024 * 1024)
 232                 sndbuf_size = 8 * 1024 * 1024;
 233         if (rcvbuf_size > 8 * 1024 * 1024)
 234                 rcvbuf_size = 8 * 1024 * 1024;
 235
 236         marg_sl = ftp_sl_init();
 237         if ((tmpdir = getenv("TMPDIR")) == NULL)
 238                 tmpdir = _PATH_TMP;
 239
 240         /* Set default operation mode based on FTPMODE environment variable */
 241         if ((cp = getenv("FTPMODE")) != NULL) {
 242                 if (strcasecmp(cp, "passive") == 0) {
 243                         passivemode = 1;
 244                         activefallback = 0;
 245                 } else if (strcasecmp(cp, "active") == 0) {
 246                         passivemode = 0;
 247                         activefallback = 0;
 248                 } else if (strcasecmp(cp, "gate") == 0) {
 249                         gatemode = 1;
 250                 } else if (strcasecmp(cp, "auto") == 0) {
 251                         passivemode = 1;
 252                         activefallback = 1;
 253                 } else
 254                         warnx("Unknown $FTPMODE `%s'; using defaults", cp);
 255         }
 256
 257         if (strcmp(getprogname(), "pftp") == 0) {
 258                 passivemode = 1;
 259                 activefallback = 0;
 260         } else if (strcmp(getprogname(), "gate-ftp") == 0)
 261                 gatemode = 1;
 262
 263         gateserver = getenv("FTPSERVER");
 264         if (gateserver == NULL || *gateserver == '\0')
 265                 gateserver = GATE_SERVER;
 266         if (gatemode) {
 267                 if (*gateserver == '\0') {
 268                         warnx(
 269 "Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp");
 270                         gatemode = 0;
 271                 }
 272         }
 273
 274         cp = getenv("TERM");
 275         if (cp == NULL || strcmp(cp, "dumb") == 0)
 276                 dumbterm = 1;
 277         else
 278                 dumbterm = 0;
 279         fromatty = isatty(fileno(stdin));
 280         ttyout = stdout;
 281         if (isatty(fileno(ttyout))) {
 282                 verbose = 1;            /* verbose if to a tty */
 283                 if (! dumbterm) {
 284 #ifndef NO_EDITCOMPLETE
 285                         if (fromatty)   /* editing mode on if tty is usable */
 286                                 editing = 1;
 287 #endif
 288 #ifndef NO_PROGRESS
 289                         if (foregroundproc())
 290                                 progress = 1;   /* progress bar on if fg */
 291 #endif
 292                 }
 293         }
 294
 295         while ((ch = getopt(argc, argv, "46AadefginN:o:pP:q:r:Rs:tT:u:vV")) != -1) {
 296                 switch (ch) {
 297                 case '4':
 298                         family = AF_INET;
 299                         break;
 300
 301                 case '6':
 302 #ifdef INET6
 303                         family = AF_INET6;
 304 #else
 305                         warnx("INET6 support is not available; ignoring -6");
 306 #endif
 307                         break;
 308
 309                 case 'A':
 310                         activefallback = 0;
 311                         passivemode = 0;
 312                         break;
 313
 314                 case 'a':
 315                         anonftp = 1;
 316                         break;
 317
 318                 case 'd':
 319                         options |= SO_DEBUG;
 320                         ftp_debug++;
 321                         break;
 322
 323                 case 'e':
 324 #ifndef NO_EDITCOMPLETE
 325                         editing = 0;
 326 #endif
 327                         break;
 328
 329                 case 'f':
 330                         flushcache = 1;
 331                         break;
 332
 333                 case 'g':
 334                         doglob = 0;
 335                         break;
 336
 337                 case 'i':
 338                         interactive = 0;
 339                         break;
 340
 341                 case 'n':
 342                         autologin = 0;
 343                         break;
 344
 345                 case 'N':
 346                         if (strlcpy(netrc, optarg, sizeof(netrc))
 347                             >= sizeof(netrc))
 348                                 errx(1, "%s: %s", optarg,
 349                                     strerror(ENAMETOOLONG));
 350                         break;
 351
 352                 case 'o':
 353                         outfile = optarg;
 354                         if (strcmp(outfile, "-") == 0)
 355                                 ttyout = stderr;
 356                         break;
 357
 358                 case 'p':
 359                         passivemode = 1;
 360                         activefallback = 0;
 361                         break;
 362
 363                 case 'P':
 364                         ftpport = optarg;
 365                         break;
 366
 367                 case 'q':
 368                         quit_time = strtol(optarg, &ep, 10);
 369                         if (quit_time < 1 || *ep != '\0')
 370                                 errx(1, "Bad quit value: %s", optarg);
 371                         break;
 372
 373                 case 'r':
 374                         retry_connect = strtol(optarg, &ep, 10);
 375                         if (retry_connect < 1 || *ep != '\0')
 376                                 errx(1, "Bad retry value: %s", optarg);
 377                         break;
 378
 379                 case 'R':
 380                         restartautofetch = 1;
 381                         break;
 382
 383                 case 's':
 384                         src_addr = optarg;
 385                         break;
 386
 387                 case 't':
 388                         trace = 1;
 389                         break;
 390
 391                 case 'T':
 392                 {
 393                         int targc;
 394                         char *targv[6], *oac;
 395                         char cmdbuf[MAX_C_NAME];
 396
 397                                 /* look for `dir,max[,incr]' */
 398                         targc = 0;
 399                         (void)strlcpy(cmdbuf, "-T", sizeof(cmdbuf));
 400                         targv[targc++] = cmdbuf;
 401                         oac = ftp_strdup(optarg);
 402
 403                         while ((cp = strsep(&oac, ",")) != NULL) {
 404                                 if (*cp == '\0') {
 405                                         warnx("Bad throttle value `%s'",
 406                                             optarg);
 407                                         usage();
 408                                         /* NOTREACHED */
 409                                 }
 410                                 targv[targc++] = cp;
 411                                 if (targc >= 5)
 412                                         break;
 413                         }
 414                         if (parserate(targc, targv, 1) == -1)
 415                                 usage();
 416                         free(oac);
 417                         break;
 418                 }
 419
 420                 case 'u':
 421                 {
 422                         isupload = 1;
 423                         interactive = 0;
 424                         upload_path = ftp_strdup(optarg);
 425
 426                         break;
 427                 }
 428
 429                 case 'v':
 430                         progress = verbose = 1;
 431                         break;
 432
 433                 case 'V':
 434                         progress = verbose = 0;
 435                         break;
 436
 437                 default:
 438                         usage();
 439                 }
 440         }
 441                         /* set line buffering on ttyout */
 442         setvbuf(ttyout, NULL, _IOLBF, 0);
 443         argc -= optind;
 444         argv += optind;
 445
 446         cpend = 0;      /* no pending replies */
 447         proxy = 0;      /* proxy not active */
 448         crflag = 1;     /* strip c.r. on ascii gets */
 449         sendport = -1;  /* not using ports */
 450
 451         if (src_addr != NULL) {
 452                 struct addrinfo hints;
 453                 int error;
 454
 455                 memset(&hints, 0, sizeof(hints));
 456                 hints.ai_family = family;
 457                 hints.ai_socktype = SOCK_STREAM;
 458                 hints.ai_flags = AI_PASSIVE;
 459                 error = getaddrinfo(src_addr, NULL, &hints, &bindai);
 460                 if (error) {
 461                         errx(1, "Can't lookup `%s': %s", src_addr,
 462                             (error == EAI_SYSTEM) ? strerror(errno)
 463                                                   : gai_strerror(error));
 464                 }
 465         }
 466
 467         /*
 468          * Cache the user name and home directory.
 469          */
 470         localhome = NULL;
 471         localname = NULL;
 472         anonuser = "anonymous";
 473         cp = getenv("HOME");
 474         if (! EMPTYSTRING(cp))
 475                 localhome = ftp_strdup(cp);
 476         pw = NULL;
 477         cp = getlogin();
 478         if (cp != NULL)
 479                 pw = getpwnam(cp);
 480         if (pw == NULL)
 481                 pw = getpwuid(getuid());
 482         if (pw != NULL) {
 483                 if (localhome == NULL && !EMPTYSTRING(pw->pw_dir))
 484                         localhome = ftp_strdup(pw->pw_dir);
 485                 localname = ftp_strdup(pw->pw_name);
 486                 anonuser = localname;
 487         }
 488         if (netrc[0] == '\0' && localhome != NULL) {
 489                 if (strlcpy(netrc, localhome, sizeof(netrc)) >= sizeof(netrc) ||
 490                     strlcat(netrc, "/.netrc", sizeof(netrc)) >= sizeof(netrc)) {
 491                         warnx("%s/.netrc: %s", localhome,
 492                             strerror(ENAMETOOLONG));
 493                         netrc[0] = '\0';
 494                 }
 495         }
 496         if (localhome == NULL)
 497                 localhome = ftp_strdup("/");
 498
 499         /*
 500          * Every anonymous FTP server I've encountered will accept the
 501          * string "username@", and will append the hostname itself. We
 502          * do this by default since many servers are picky about not
 503          * having a FQDN in the anonymous password.
 504          * - thorpej@NetBSD.org
 505          */
 506         len = strlen(anonuser) + 2;
 507         anonpass = ftp_malloc(len);
 508         (void)strlcpy(anonpass, anonuser, len);
 509         (void)strlcat(anonpass, "@",      len);
 510
 511                         /*
 512                          * set all the defaults for options defined in
 513                          * struct option optiontab[]  declared in cmdtab.c
 514                          */
 515         setupoption("anonpass",         getenv("FTPANONPASS"),  anonpass);
 516         setupoption("ftp_proxy",        getenv(FTP_PROXY),      "");
 517         setupoption("http_proxy",       getenv(HTTP_PROXY),     "");
 518         setupoption("no_proxy",         getenv(NO_PROXY),       "");
 519         setupoption("pager",            getenv("PAGER"),        DEFAULTPAGER);
 520         setupoption("prompt",           getenv("FTPPROMPT"),    DEFAULTPROMPT);
 521         setupoption("rprompt",          getenv("FTPRPROMPT"),   DEFAULTRPROMPT);
 522
 523         free(anonpass);
 524
 525         setttywidth(0);
 526 #ifdef SIGINFO
 527         (void)xsignal(SIGINFO, psummary);
 528 #endif
 529         (void)xsignal(SIGQUIT, psummary);
 530         (void)xsignal(SIGUSR1, crankrate);
 531         (void)xsignal(SIGUSR2, crankrate);
 532         (void)xsignal(SIGWINCH, setttywidth);
 533
 534         if (argc > 0) {
 535                 if (isupload) {
 536                         rval = auto_put(argc, argv, upload_path);
 537  sigint_or_rval_exit:
 538                         if (sigint_raised) {
 539                                 (void)xsignal(SIGINT, SIG_DFL);
 540                                 raise(SIGINT);
 541                         }
 542                         exit(rval);
 543                 } else if (strchr(argv[0], ':') != NULL
 544                             && ! isipv6addr(argv[0])) {
 545                         rval = auto_fetch(argc, argv);
 546                         if (rval >= 0)          /* -1 == connected and cd-ed */
 547                                 goto sigint_or_rval_exit;
 548                 } else {
 549                         char *xargv[4], *uuser, *host;
 550                         char cmdbuf[MAXPATHLEN];
 551
 552                         if ((rval = sigsetjmp(toplevel, 1)))
 553                                 goto sigint_or_rval_exit;
 554                         (void)xsignal(SIGINT, intr);
 555                         (void)xsignal(SIGPIPE, lostpeer);
 556                         uuser = NULL;
 557                         host = argv[0];
 558                         cp = strchr(host, '@');
 559                         if (cp) {
 560                                 *cp = '\0';
 561                                 uuser = host;
 562                                 host = cp + 1;
 563                         }
 564                         (void)strlcpy(cmdbuf, getprogname(), sizeof(cmdbuf));
 565                         xargv[0] = cmdbuf;
 566                         xargv[1] = host;
 567                         xargv[2] = argv[1];
 568                         xargv[3] = NULL;
 569                         do {
 570                                 int oautologin;
 571
 572                                 oautologin = autologin;
 573                                 if (uuser != NULL) {
 574                                         anonftp = 0;
 575                                         autologin = 0;
 576                                 }
 577                                 setpeer(argc+1, xargv);
 578                                 autologin = oautologin;
 579                                 if (connected == 1 && uuser != NULL)
 580                                         (void)ftp_login(host, uuser, NULL);
 581                                 if (!retry_connect)
 582                                         break;
 583                                 if (!connected) {
 584                                         macnum = 0;
 585                                         fprintf(ttyout,
 586                                             "Retrying in %d seconds...\n",
 587                                             retry_connect);
 588                                         sleep(retry_connect);
 589                                 }
 590                         } while (!connected);
 591                         retry_connect = 0; /* connected, stop hiding msgs */
 592                 }
 593         }
 594         if (isupload)
 595                 usage();
 596
 597 #ifndef NO_EDITCOMPLETE
 598         controlediting();
 599 #endif /* !NO_EDITCOMPLETE */
 600
 601         (void)sigsetjmp(toplevel, 1);
 602         (void)xsignal(SIGINT, intr);
 603         (void)xsignal(SIGPIPE, lostpeer);
 604         for (;;)
 605                 cmdscanner();
 606 }
 607
 608 /*
 609  * Generate a prompt
 610  */
 611 char *
 612 prompt(void)
 613 {
 614         static char     **promptopt;
 615         static char       buf[MAXPATHLEN];
 616
 617         if (promptopt == NULL) {
 618                 struct option *o;
 619
 620                 o = getoption("prompt");
 621                 if (o == NULL)
 622                         errx(1, "prompt: no such option `prompt'");
 623                 promptopt = &(o->value);
 624         }
 625         formatbuf(buf, sizeof(buf), *promptopt ? *promptopt : DEFAULTPROMPT);
 626         return (buf);
 627 }
 628
 629 /*
 630  * Generate an rprompt
 631  */
 632 char *
 633 rprompt(void)
 634 {
 635         static char     **rpromptopt;
 636         static char       buf[MAXPATHLEN];
 637
 638         if (rpromptopt == NULL) {
 639                 struct option *o;
 640
 641                 o = getoption("rprompt");
 642                 if (o == NULL)
 643                         errx(1, "rprompt: no such option `rprompt'");
 644                 rpromptopt = &(o->value);
 645         }
 646         formatbuf(buf, sizeof(buf), *rpromptopt ? *rpromptopt : DEFAULTRPROMPT);
 647         return (buf);
 648 }
 649
 650 /*
 651  * Command parser.
 652  */
 653 void
 654 cmdscanner(void)
 655 {
 656         struct cmd      *c;
 657         char            *p;
 658 #ifndef NO_EDITCOMPLETE
 659         int              ch;
 660         size_t           num;
 661 #endif
 662         int              len;
 663         char             cmdbuf[MAX_C_NAME];
 664
 665         for (;;) {
 666 #ifndef NO_EDITCOMPLETE
 667                 if (!editing) {
 668 #endif /* !NO_EDITCOMPLETE */
 669                         if (fromatty) {
 670                                 fputs(prompt(), ttyout);
 671                                 p = rprompt();
 672                                 if (*p)
 673                                         fprintf(ttyout, "%s ", p);
 674                         }
 675                         (void)fflush(ttyout);
 676                         len = get_line(stdin, line, sizeof(line), NULL);
 677                         switch (len) {
 678                         case -1:        /* EOF */
 679                         case -2:        /* error */
 680                                 if (fromatty)
 681                                         putc('\n', ttyout);
 682                                 quit(0, NULL);
 683                                 /* NOTREACHED */
 684                         case -3:        /* too long; try again */
 685                                 fputs("Sorry, input line is too long.\n",
 686                                     ttyout);
 687                                 continue;
 688                         case 0:         /* empty; try again */
 689                                 continue;
 690                         default:        /* all ok */
 691                                 break;
 692                         }
 693 #ifndef NO_EDITCOMPLETE
 694                 } else {
 695                         const char *buf;
 696                         HistEvent ev;
 697                         cursor_pos = NULL;
 698
 699                         buf = el_gets(el, &ch);
 700                         num = ch;
 701                         if (buf == NULL || num == 0) {
 702                                 if (fromatty)
 703                                         putc('\n', ttyout);
 704                                 quit(0, NULL);
 705                         }
 706                         if (num >= sizeof(line)) {
 707                                 fputs("Sorry, input line is too long.\n",
 708                                     ttyout);
 709                                 break;
 710                         }
 711                         memcpy(line, buf, num);
 712                         if (line[--num] == '\n') {
 713                                 line[num] = '\0';
 714                                 if (num == 0)
 715                                         break;
 716                         }
 717                         history(hist, &ev, H_ENTER, buf);
 718                 }
 719 #endif /* !NO_EDITCOMPLETE */
 720
 721                 makeargv();
 722                 if (margc == 0)
 723                         continue;
 724                 c = getcmd(margv[0]);
 725                 if (c == (struct cmd *)-1) {
 726                         fputs("?Ambiguous command.\n", ttyout);
 727                         continue;
 728                 }
 729                 if (c == NULL) {
 730 #if !defined(NO_EDITCOMPLETE)
 731                         /*
 732                          * attempt to el_parse() unknown commands.
 733                          * any command containing a ':' would be parsed
 734                          * as "[prog:]cmd ...", and will result in a
 735                          * false positive if prog != "ftp", so treat
 736                          * such commands as invalid.
 737                          */
 738                         if (strchr(margv[0], ':') != NULL ||
 739                             !editing ||
 740                             el_parse(el, margc, (const char **)margv) != 0)
 741 #endif /* !NO_EDITCOMPLETE */
 742                                 fputs("?Invalid command.\n", ttyout);
 743                         continue;
 744                 }
 745                 if (c->c_conn && !connected) {
 746                         fputs("Not connected.\n", ttyout);
 747                         continue;
 748                 }
 749                 confirmrest = 0;
 750                 (void)strlcpy(cmdbuf, c->c_name, sizeof(cmdbuf));
 751                 margv[0] = cmdbuf;
 752                 (*c->c_handler)(margc, margv);
 753                 if (bell && c->c_bell)
 754                         (void)putc('\007', ttyout);
 755                 if (c->c_handler != help)
 756                         break;
 757         }
 758         (void)xsignal(SIGINT, intr);
 759         (void)xsignal(SIGPIPE, lostpeer);
 760 }
 761
 762 struct cmd *
 763 getcmd(const char *name)
 764 {
 765         const char *p, *q;
 766         struct cmd *c, *found;
 767         int nmatches, longest;
 768
 769         if (name == NULL)
 770                 return (0);
 771
 772         longest = 0;
 773         nmatches = 0;
 774         found = 0;
 775         for (c = cmdtab; (p = c->c_name) != NULL; c++) {
 776                 for (q = name; *q == *p++; q++)
 777                         if (*q == 0)            /* exact match? */
 778                                 return (c);
 779                 if (!*q) {                      /* the name was a prefix */
 780                         if (q - name > longest) {
 781                                 longest = q - name;
 782                                 nmatches = 1;
 783                                 found = c;
 784                         } else if (q - name == longest)
 785                                 nmatches++;
 786                 }
 787         }
 788         if (nmatches > 1)
 789                 return ((struct cmd *)-1);
 790         return (found);
 791 }
 792
 793 /*
 794  * Slice a string up into argc/argv.
 795  */
 796
 797 int slrflag;
 798
 799 void
 800 makeargv(void)
 801 {
 802         char *argp;
 803
 804         stringbase = line;              /* scan from first of buffer */
 805         argbase = argbuf;               /* store from first of buffer */
 806         slrflag = 0;
 807         marg_sl->sl_cur = 0;            /* reset to start of marg_sl */
 808         for (margc = 0; ; margc++) {
 809                 argp = slurpstring();
 810                 ftp_sl_add(marg_sl, argp);
 811                 if (argp == NULL)
 812                         break;
 813         }
 814 #ifndef NO_EDITCOMPLETE
 815         if (cursor_pos == line) {
 816                 cursor_argc = 0;
 817                 cursor_argo = 0;
 818         } else if (cursor_pos != NULL) {
 819                 cursor_argc = margc;
 820                 cursor_argo = strlen(margv[margc-1]);
 821         }
 822 #endif /* !NO_EDITCOMPLETE */
 823 }
 824
 825 #ifdef NO_EDITCOMPLETE
 826 #define INC_CHKCURSOR(x)        (x)++
 827 #else  /* !NO_EDITCOMPLETE */
 828 #define INC_CHKCURSOR(x)        { (x)++ ; \
 829                                 if (x == cursor_pos) { \
 830                                         cursor_argc = margc; \
 831                                         cursor_argo = ap-argbase; \
 832                                         cursor_pos = NULL; \
 833                                 } }
 834
 835 #endif /* !NO_EDITCOMPLETE */
 836
 837 /*
 838  * Parse string into argbuf;
 839  * implemented with FSM to
 840  * handle quoting and strings
 841  */
 842 char *
 843 slurpstring(void)
 844 {
 845         static char bangstr[2] = { '!', '\0' };
 846         static char dollarstr[2] = { '$', '\0' };
 847         int got_one = 0;
 848         char *sb = stringbase;
 849         char *ap = argbase;
 850         char *tmp = argbase;            /* will return this if token found */
 851
 852         if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */
 853                 switch (slrflag) {      /* and $ as token for macro invoke */
 854                         case 0:
 855                                 slrflag++;
 856                                 INC_CHKCURSOR(stringbase);
 857                                 return ((*sb == '!') ? bangstr : dollarstr);
 858                                 /* NOTREACHED */
 859                         case 1:
 860                                 slrflag++;
 861                                 altarg = stringbase;
 862                                 break;
 863                         default:
 864                                 break;
 865                 }
 866         }
 867
 868 S0:
 869         switch (*sb) {
 870
 871         case '\0':
 872                 goto OUT;
 873
 874         case ' ':
 875         case '\t':
 876                 INC_CHKCURSOR(sb);
 877                 goto S0;
 878
 879         default:
 880                 switch (slrflag) {
 881                         case 0:
 882                                 slrflag++;
 883                                 break;
 884                         case 1:
 885                                 slrflag++;
 886                                 altarg = sb;
 887                                 break;
 888                         default:
 889                                 break;
 890                 }
 891                 goto S1;
 892         }
 893
 894 S1:
 895         switch (*sb) {
 896
 897         case ' ':
 898         case '\t':
 899         case '\0':
 900                 goto OUT;       /* end of token */
 901
 902         case '\\':
 903                 INC_CHKCURSOR(sb);
 904                 goto S2;        /* slurp next character */
 905
 906         case '"':
 907                 INC_CHKCURSOR(sb);
 908                 goto S3;        /* slurp quoted string */
 909
 910         default:
 911                 *ap = *sb;      /* add character to token */
 912                 ap++;
 913                 INC_CHKCURSOR(sb);
 914                 got_one = 1;
 915                 goto S1;
 916         }
 917
 918 S2:
 919         switch (*sb) {
 920
 921         case '\0':
 922                 goto OUT;
 923
 924         default:
 925                 *ap = *sb;
 926                 ap++;
 927                 INC_CHKCURSOR(sb);
 928                 got_one = 1;
 929                 goto S1;
 930         }
 931
 932 S3:
 933         switch (*sb) {
 934
 935         case '\0':
 936                 goto OUT;
 937
 938         case '"':
 939                 INC_CHKCURSOR(sb);
 940                 goto S1;
 941
 942         default:
 943                 *ap = *sb;
 944                 ap++;
 945                 INC_CHKCURSOR(sb);
 946                 got_one = 1;
 947                 goto S3;
 948         }
 949
 950 OUT:
 951         if (got_one)
 952                 *ap++ = '\0';
 953         argbase = ap;                   /* update storage pointer */
 954         stringbase = sb;                /* update scan pointer */
 955         if (got_one) {
 956                 return (tmp);
 957         }
 958         switch (slrflag) {
 959                 case 0:
 960                         slrflag++;
 961                         break;
 962                 case 1:
 963                         slrflag++;
 964                         altarg = NULL;
 965                         break;
 966                 default:
 967                         break;
 968         }
 969         return (NULL);
 970 }
 971
 972 /*
 973  * Help/usage command.
 974  * Call each command handler with argc == 0 and argv[0] == name.
 975  */
 976 void
 977 help(int argc, char *argv[])
 978 {
 979         struct cmd *c;
 980         char *nargv[1], *cmd;
 981         const char *p;
 982         int isusage;
 983
 984         cmd = argv[0];
 985         isusage = (strcmp(cmd, "usage") == 0);
 986         if (argc == 0 || (isusage && argc == 1)) {
 987                 UPRINTF("usage: %s [command [...]]\n", cmd);
 988                 return;
 989         }
 990         if (argc == 1) {
 991                 StringList *buf;
 992
 993                 buf = ftp_sl_init();
 994                 fprintf(ttyout,
 995                     "%sommands may be abbreviated.  Commands are:\n\n",
 996                     proxy ? "Proxy c" : "C");
 997                 for (c = cmdtab; (p = c->c_name) != NULL; c++)
 998                         if (!proxy || c->c_proxy)
 999                                 ftp_sl_add(buf, ftp_strdup(p));
1000                 list_vertical(buf);
1001                 sl_free(buf, 1);
1002                 return;
1003         }
1004
1005 #define HELPINDENT ((int) sizeof("disconnect"))
1006
1007         while (--argc > 0) {
1008                 char *arg;
1009                 char cmdbuf[MAX_C_NAME];
1010
1011                 arg = *++argv;
1012                 c = getcmd(arg);
1013                 if (c == (struct cmd *)-1)
1014                         fprintf(ttyout, "?Ambiguous %s command `%s'\n",
1015                             cmd, arg);
1016                 else if (c == NULL)
1017                         fprintf(ttyout, "?Invalid %s command `%s'\n",
1018                             cmd, arg);
1019                 else {
1020                         if (isusage) {
1021                                 (void)strlcpy(cmdbuf, c->c_name, sizeof(cmdbuf));
1022                                 nargv[0] = cmdbuf;
1023                                 (*c->c_handler)(0, nargv);
1024                         } else
1025                                 fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
1026                                     c->c_name, c->c_help);
1027                 }
1028         }
1029 }
1030
1031 struct option *
1032 getoption(const char *name)
1033 {
1034         const char *p;
1035         struct option *c;
1036
1037         if (name == NULL)
1038                 return (NULL);
1039         for (c = optiontab; (p = c->name) != NULL; c++) {
1040                 if (strcasecmp(p, name) == 0)
1041                         return (c);
1042         }
1043         return (NULL);
1044 }
1045
1046 char *
1047 getoptionvalue(const char *name)
1048 {
1049         struct option *c;
1050
1051         if (name == NULL)
1052                 errx(1, "getoptionvalue: invoked with NULL name");
1053         c = getoption(name);
1054         if (c != NULL)
1055                 return (c->value);
1056         errx(1, "getoptionvalue: invoked with unknown option `%s'", name);
1057         /* NOTREACHED */
1058 }
1059
1060 static void
1061 setupoption(const char *name, const char *value, const char *defaultvalue)
1062 {
1063         set_option(name, value ? value : defaultvalue, 0);
1064 }
1065
1066 void
1067 usage(void)
1068 {
1069         const char *progname = getprogname();
1070
1071         (void)fprintf(stderr,
1072 "usage: %s [-46AadefginpRtVv] [-N netrc] [-o outfile] [-P port] [-q quittime]\n"
1073 "           [-r retry] [-s srcaddr] [-T dir,max[,inc]]\n"
1074 "           [[user@]host [port]] [host:path[/]] [file:///file]\n"
1075 "           [ftp://[user[:pass]@]host[:port]/path[/]]\n"
1076 "           [http://[user[:pass]@]host[:port]/path] [...]\n"
1077 "       %s -u URL file [...]\n", progname, progname);
1078         exit(1);
1079 }