contrib/tnftp/main.c

   1 /*      $NetBSD: main.c,v 1.101 2006/01/31 20:05:36 christos Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1996-2005 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  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the NetBSD
  21  *      Foundation, Inc. and its contributors.
  22  * 4. Neither the name of The NetBSD Foundation nor the names of its
  23  *    contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 /*
  40  * Copyright (c) 1985, 1989, 1993, 1994
  41  *      The Regents of the University of California.  All rights reserved.
  42  *
  43  * Redistribution and use in source and binary forms, with or without
  44  * modification, are permitted provided that the following conditions
  45  * are met:
  46  * 1. Redistributions of source code must retain the above copyright
  47  *    notice, this list of conditions and the following disclaimer.
  48  * 2. Redistributions in binary form must reproduce the above copyright
  49  *    notice, this list of conditions and the following disclaimer in the
  50  *    documentation and/or other materials provided with the distribution.
  51  * 3. Neither the name of the University nor the names of its contributors
  52  *    may be used to endorse or promote products derived from this software
  53  *    without specific prior written permission.
  54  *
  55  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  56  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  57  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  58  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  59  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  60  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  61  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  62  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  63  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  64  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  65  * SUCH DAMAGE.
  66  */
  67
  68 /*
  69  * Copyright (C) 1997 and 1998 WIDE Project.
  70  * All rights reserved.
  71  *
  72  * Redistribution and use in source and binary forms, with or without
  73  * modification, are permitted provided that the following conditions
  74  * are met:
  75  * 1. Redistributions of source code must retain the above copyright
  76  *    notice, this list of conditions and the following disclaimer.
  77  * 2. Redistributions in binary form must reproduce the above copyright
  78  *    notice, this list of conditions and the following disclaimer in the
  79  *    documentation and/or other materials provided with the distribution.
  80  * 3. Neither the name of the project nor the names of its contributors
  81  *    may be used to endorse or promote products derived from this software
  82  *    without specific prior written permission.
  83  *
  84  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  85  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  86  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  87  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  88  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  89  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  90  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  91  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  92  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  93  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  94  * SUCH DAMAGE.
  95  */
  96
  97 #include <sys/cdefs.h>
  98 #ifndef lint
  99 __COPYRIGHT("@(#) Copyright (c) 1985, 1989, 1993, 1994\n\
 100         The Regents of the University of California.  All rights reserved.\n");
 101 #endif /* not lint */
 102
 103 #ifndef lint
 104 #if 0
 105 static char sccsid[] = "@(#)main.c      8.6 (Berkeley) 10/9/94";
 106 #else
 107 __RCSID("$NetBSD: main.c,v 1.101 2006/01/31 20:05:36 christos Exp $");
 108 #endif
 109 #endif /* not lint */
 110
 111 /*
 112  * FTP User Program -- Command Interface.
 113  */
 114 #include <sys/types.h>
 115 #include <sys/socket.h>
 116
 117 #include <err.h>
 118 #include <errno.h>
 119 #include <netdb.h>
 120 #include <paths.h>
 121 #include <pwd.h>
 122 #include <signal.h>
 123 #include <stdio.h>
 124 #include <stdlib.h>
 125 #include <string.h>
 126 #include <unistd.h>
 127 #include <locale.h>
 128
 129 #define GLOBAL          /* force GLOBAL decls in ftp_var.h to be declared */
 130 #include "ftp_var.h"
 131
 132 #define FTP_PROXY       "ftp_proxy"     /* env var with FTP proxy location */
 133 #define HTTP_PROXY      "http_proxy"    /* env var with HTTP proxy location */
 134 #define NO_PROXY        "no_proxy"      /* env var with list of non-proxied
 135                                          * hosts, comma or space separated */
 136
 137 static void     setupoption(char *, char *, char *);
 138 int             main(int, char *[]);
 139
 140 int
 141 main(int argc, char *argv[])
 142 {
 143         int ch, rval;
 144         struct passwd *pw;
 145         char *cp, *ep, *anonuser, *anonpass, *upload_path;
 146         int dumbterm, s, isupload;
 147         size_t len;
 148         socklen_t slen;
 149
 150         setlocale(LC_ALL, "");
 151         setprogname(argv[0]);
 152
 153         sigint_raised = 0;
 154
 155         ftpport = "ftp";
 156         httpport = "http";
 157         gateport = NULL;
 158         cp = getenv("FTPSERVERPORT");
 159         if (cp != NULL)
 160                 gateport = cp;
 161         else
 162                 gateport = "ftpgate";
 163         doglob = 1;
 164         interactive = 1;
 165         autologin = 1;
 166         passivemode = 1;
 167         activefallback = 1;
 168         preserve = 1;
 169         verbose = 0;
 170         progress = 0;
 171         gatemode = 0;
 172         data = -1;
 173         outfile = NULL;
 174         restartautofetch = 0;
 175 #ifndef NO_EDITCOMPLETE
 176         editing = 0;
 177         el = NULL;
 178         hist = NULL;
 179 #endif
 180         bytes = 0;
 181         mark = HASHBYTES;
 182         rate_get = 0;
 183         rate_get_incr = DEFAULTINCR;
 184         rate_put = 0;
 185         rate_put_incr = DEFAULTINCR;
 186 #ifdef INET6
 187         epsv4 = 1;
 188 #else
 189         epsv4 = 0;
 190 #endif
 191         epsv4bad = 0;
 192         upload_path = NULL;
 193         isupload = 0;
 194         reply_callback = NULL;
 195         family = AF_UNSPEC;
 196
 197         netrc[0] = '\0';
 198         cp = getenv("NETRC");
 199         if (cp != NULL && strlcpy(netrc, cp, sizeof(netrc)) >= sizeof(netrc))
 200                 errx(1, "$NETRC `%s': %s", cp, strerror(ENAMETOOLONG));
 201
 202         /*
 203          * Get the default socket buffer sizes if we don't already have them.
 204          * It doesn't matter which socket we do this to, because on the first
 205          * call no socket buffer sizes will have been modified, so we are
 206          * guaranteed to get the system defaults.
 207          */
 208         s = socket(AF_INET, SOCK_STREAM, 0);
 209         if (s == -1)
 210                 err(1, "can't create socket");
 211         slen = sizeof(rcvbuf_size);
 212         if (getsockopt(s, SOL_SOCKET, SO_RCVBUF,
 213             (void *)&rcvbuf_size, &slen) == -1)
 214                 err(1, "unable to get default rcvbuf size");
 215         slen = sizeof(sndbuf_size);
 216         if (getsockopt(s, SOL_SOCKET, SO_SNDBUF,
 217             (void *)&sndbuf_size, &slen) == -1)
 218                 err(1, "unable to get default sndbuf size");
 219         (void)close(s);
 220                                         /* sanity check returned buffer sizes */
 221         if (rcvbuf_size <= 0)
 222                 rcvbuf_size = 8 * 1024;
 223         if (sndbuf_size <= 0)
 224                 sndbuf_size = 8 * 1024;
 225
 226         if (sndbuf_size > 8 * 1024 * 1024)
 227                 sndbuf_size = 8 * 1024 * 1024;
 228         if (rcvbuf_size > 8 * 1024 * 1024)
 229                 rcvbuf_size = 8 * 1024 * 1024;
 230
 231         marg_sl = ftp_sl_init();
 232         if ((tmpdir = getenv("TMPDIR")) == NULL)
 233                 tmpdir = _PATH_TMP;
 234
 235         /* Set default operation mode based on FTPMODE environment variable */
 236         if ((cp = getenv("FTPMODE")) != NULL) {
 237                 if (strcasecmp(cp, "passive") == 0) {
 238                         passivemode = 1;
 239                         activefallback = 0;
 240                 } else if (strcasecmp(cp, "active") == 0) {
 241                         passivemode = 0;
 242                         activefallback = 0;
 243                 } else if (strcasecmp(cp, "gate") == 0) {
 244                         gatemode = 1;
 245                 } else if (strcasecmp(cp, "auto") == 0) {
 246                         passivemode = 1;
 247                         activefallback = 1;
 248                 } else
 249                         warnx("unknown $FTPMODE '%s'; using defaults", cp);
 250         }
 251
 252         if (strcmp(getprogname(), "pftp") == 0) {
 253                 passivemode = 1;
 254                 activefallback = 0;
 255         } else if (strcmp(getprogname(), "gate-ftp") == 0)
 256                 gatemode = 1;
 257
 258         gateserver = getenv("FTPSERVER");
 259         if (gateserver == NULL || *gateserver == '\0')
 260                 gateserver = GATE_SERVER;
 261         if (gatemode) {
 262                 if (*gateserver == '\0') {
 263                         warnx(
 264 "Neither $FTPSERVER nor GATE_SERVER is defined; disabling gate-ftp");
 265                         gatemode = 0;
 266                 }
 267         }
 268
 269         cp = getenv("TERM");
 270         if (cp == NULL || strcmp(cp, "dumb") == 0)
 271                 dumbterm = 1;
 272         else
 273                 dumbterm = 0;
 274         fromatty = isatty(fileno(stdin));
 275         ttyout = stdout;
 276         if (isatty(fileno(ttyout))) {
 277                 verbose = 1;            /* verbose if to a tty */
 278                 if (! dumbterm) {
 279 #ifndef NO_EDITCOMPLETE
 280                         if (fromatty)   /* editing mode on if tty is usable */
 281                                 editing = 1;
 282 #endif
 283 #ifndef NO_PROGRESS
 284                         if (foregroundproc())
 285                                 progress = 1;   /* progress bar on if fg */
 286 #endif
 287                 }
 288         }
 289
 290         while ((ch = getopt(argc, argv, "46AadefginN:o:pP:q:r:RtT:u:vV")) != -1) {
 291                 switch (ch) {
 292                 case '4':
 293                         family = AF_INET;
 294                         break;
 295
 296                 case '6':
 297 #ifdef INET6
 298                         family = AF_INET6;
 299 #else
 300                         warnx("INET6 support is not available; ignoring -6");
 301 #endif
 302                         break;
 303
 304                 case 'A':
 305                         activefallback = 0;
 306                         passivemode = 0;
 307                         break;
 308
 309                 case 'a':
 310                         anonftp = 1;
 311                         break;
 312
 313                 case 'd':
 314                         options |= SO_DEBUG;
 315                         ftp_debug++;
 316                         break;
 317
 318                 case 'e':
 319 #ifndef NO_EDITCOMPLETE
 320                         editing = 0;
 321 #endif
 322                         break;
 323
 324                 case 'f':
 325                         flushcache = 1;
 326                         break;
 327
 328                 case 'g':
 329                         doglob = 0;
 330                         break;
 331
 332                 case 'i':
 333                         interactive = 0;
 334                         break;
 335
 336                 case 'n':
 337                         autologin = 0;
 338                         break;
 339
 340                 case 'N':
 341                         if (strlcpy(netrc, optarg, sizeof(netrc))
 342                             >= sizeof(netrc))
 343                                 errx(1, "%s: %s", optarg,
 344                                     strerror(ENAMETOOLONG));
 345                         break;
 346
 347                 case 'o':
 348                         outfile = optarg;
 349                         if (strcmp(outfile, "-") == 0)
 350                                 ttyout = stderr;
 351                         break;
 352
 353                 case 'p':
 354                         passivemode = 1;
 355                         activefallback = 0;
 356                         break;
 357
 358                 case 'P':
 359                         ftpport = optarg;
 360                         break;
 361
 362                 case 'q':
 363                         quit_time = strtol(optarg, &ep, 10);
 364                         if (quit_time < 1 || *ep != '\0')
 365                                 errx(1, "bad quit value: %s", optarg);
 366                         break;
 367
 368                 case 'r':
 369                         retry_connect = strtol(optarg, &ep, 10);
 370                         if (retry_connect < 1 || *ep != '\0')
 371                                 errx(1, "bad retry value: %s", optarg);
 372                         break;
 373
 374                 case 'R':
 375                         restartautofetch = 1;
 376                         break;
 377
 378                 case 't':
 379                         trace = 1;
 380                         break;
 381
 382                 case 'T':
 383                 {
 384                         int targc;
 385                         char *targv[6], *oac;
 386
 387                                 /* look for `dir,max[,incr]' */
 388                         targc = 0;
 389                         targv[targc++] = "-T";
 390                         oac = ftp_strdup(optarg);
 391
 392                         while ((cp = strsep(&oac, ",")) != NULL) {
 393                                 if (*cp == '\0') {
 394                                         warnx("bad throttle value: %s", optarg);
 395                                         usage();
 396                                         /* NOTREACHED */
 397                                 }
 398                                 targv[targc++] = cp;
 399                                 if (targc >= 5)
 400                                         break;
 401                         }
 402                         if (parserate(targc, targv, 1) == -1)
 403                                 usage();
 404                         free(oac);
 405                         break;
 406                 }
 407
 408                 case 'u':
 409                 {
 410                         isupload = 1;
 411                         interactive = 0;
 412                         upload_path = ftp_strdup(optarg);
 413
 414                         break;
 415                 }
 416
 417                 case 'v':
 418                         progress = verbose = 1;
 419                         break;
 420
 421                 case 'V':
 422                         progress = verbose = 0;
 423                         break;
 424
 425                 default:
 426                         usage();
 427                 }
 428         }
 429                         /* set line buffering on ttyout */
 430         setvbuf(ttyout, NULL, _IOLBF, 0);
 431         argc -= optind;
 432         argv += optind;
 433
 434         cpend = 0;      /* no pending replies */
 435         proxy = 0;      /* proxy not active */
 436         crflag = 1;     /* strip c.r. on ascii gets */
 437         sendport = -1;  /* not using ports */
 438
 439         /*
 440          * Cache the user name and home directory.
 441          */
 442         localhome = NULL;
 443         localname = NULL;
 444         anonuser = "anonymous";
 445         cp = getenv("HOME");
 446         if (! EMPTYSTRING(cp))
 447                 localhome = ftp_strdup(cp);
 448         pw = NULL;
 449         cp = getlogin();
 450         if (cp != NULL)
 451                 pw = getpwnam(cp);
 452         if (pw == NULL)
 453                 pw = getpwuid(getuid());
 454         if (pw != NULL) {
 455                 if (localhome == NULL && !EMPTYSTRING(pw->pw_dir))
 456                         localhome = ftp_strdup(pw->pw_dir);
 457                 localname = ftp_strdup(pw->pw_name);
 458                 anonuser = localname;
 459         }
 460         if (netrc[0] == '\0' && localhome != NULL) {
 461                 if (strlcpy(netrc, localhome, sizeof(netrc)) >= sizeof(netrc) ||
 462                     strlcat(netrc, "/.netrc", sizeof(netrc)) >= sizeof(netrc)) {
 463                         warnx("%s/.netrc: %s", localhome,
 464                             strerror(ENAMETOOLONG));
 465                         netrc[0] = '\0';
 466                 }
 467         }
 468         if (localhome == NULL)
 469                 localhome = ftp_strdup("/");
 470
 471         /*
 472          * Every anonymous FTP server I've encountered will accept the
 473          * string "username@", and will append the hostname itself. We
 474          * do this by default since many servers are picky about not
 475          * having a FQDN in the anonymous password.
 476          * - thorpej@NetBSD.org
 477          */
 478         len = strlen(anonuser) + 2;
 479         anonpass = ftp_malloc(len);
 480         (void)strlcpy(anonpass, anonuser, len);
 481         (void)strlcat(anonpass, "@",      len);
 482
 483                         /*
 484                          * set all the defaults for options defined in
 485                          * struct option optiontab[]  declared in cmdtab.c
 486                          */
 487         setupoption("anonpass",         getenv("FTPANONPASS"),  anonpass);
 488         setupoption("ftp_proxy",        getenv(FTP_PROXY),      "");
 489         setupoption("http_proxy",       getenv(HTTP_PROXY),     "");
 490         setupoption("no_proxy",         getenv(NO_PROXY),       "");
 491         setupoption("pager",            getenv("PAGER"),        DEFAULTPAGER);
 492         setupoption("prompt",           getenv("FTPPROMPT"),    DEFAULTPROMPT);
 493         setupoption("rprompt",          getenv("FTPRPROMPT"),   DEFAULTRPROMPT);
 494
 495         free(anonpass);
 496
 497         setttywidth(0);
 498 #ifdef SIGINFO
 499         (void)xsignal(SIGINFO, psummary);
 500 #endif
 501         (void)xsignal(SIGQUIT, psummary);
 502         (void)xsignal(SIGUSR1, crankrate);
 503         (void)xsignal(SIGUSR2, crankrate);
 504         (void)xsignal(SIGWINCH, setttywidth);
 505
 506 #ifdef __GNUC__                 /* to shut up gcc warnings */
 507         (void)&argc;
 508         (void)&argv;
 509 #endif
 510
 511         if (argc > 0) {
 512                 if (isupload) {
 513                         rval = auto_put(argc, argv, upload_path);
 514  sigint_or_rval_exit:
 515                         if (sigint_raised) {
 516                                 (void)xsignal(SIGINT, SIG_DFL);
 517                                 raise(SIGINT);
 518                         }
 519                         exit(rval);
 520                 } else if (strchr(argv[0], ':') != NULL
 521                             && ! isipv6addr(argv[0])) {
 522                         rval = auto_fetch(argc, argv);
 523                         if (rval >= 0)          /* -1 == connected and cd-ed */
 524                                 goto sigint_or_rval_exit;
 525                 } else {
 526                         char *xargv[4], *user, *host;
 527
 528                         if ((rval = sigsetjmp(toplevel, 1)))
 529                                 goto sigint_or_rval_exit;
 530                         (void)xsignal(SIGINT, intr);
 531                         (void)xsignal(SIGPIPE, lostpeer);
 532                         user = NULL;
 533                         host = argv[0];
 534                         cp = strchr(host, '@');
 535                         if (cp) {
 536                                 *cp = '\0';
 537                                 user = host;
 538                                 host = cp + 1;
 539                         }
 540                         /* XXX discards const */
 541                         xargv[0] = (char *)getprogname();
 542                         xargv[1] = host;
 543                         xargv[2] = argv[1];
 544                         xargv[3] = NULL;
 545                         do {
 546                                 int oautologin;
 547
 548                                 oautologin = autologin;
 549                                 if (user != NULL) {
 550                                         anonftp = 0;
 551                                         autologin = 0;
 552                                 }
 553                                 setpeer(argc+1, xargv);
 554                                 autologin = oautologin;
 555                                 if (connected == 1 && user != NULL)
 556                                         (void)ftp_login(host, user, NULL);
 557                                 if (!retry_connect)
 558                                         break;
 559                                 if (!connected) {
 560                                         macnum = 0;
 561                                         fprintf(ttyout,
 562                                             "Retrying in %d seconds...\n",
 563                                             retry_connect);
 564                                         sleep(retry_connect);
 565                                 }
 566                         } while (!connected);
 567                         retry_connect = 0; /* connected, stop hiding msgs */
 568                 }
 569         }
 570         if (isupload)
 571                 usage();
 572
 573 #ifndef NO_EDITCOMPLETE
 574         controlediting();
 575 #endif /* !NO_EDITCOMPLETE */
 576
 577         (void)sigsetjmp(toplevel, 1);
 578         (void)xsignal(SIGINT, intr);
 579         (void)xsignal(SIGPIPE, lostpeer);
 580         for (;;)
 581                 cmdscanner();
 582 }
 583
 584 /*
 585  * Generate a prompt
 586  */
 587 char *
 588 prompt(void)
 589 {
 590         static char     **prompt;
 591         static char       buf[MAXPATHLEN];
 592
 593         if (prompt == NULL) {
 594                 struct option *o;
 595
 596                 o = getoption("prompt");
 597                 if (o == NULL)
 598                         errx(1, "no such option `prompt'");
 599                 prompt = &(o->value);
 600         }
 601         formatbuf(buf, sizeof(buf), *prompt ? *prompt : DEFAULTPROMPT);
 602         return (buf);
 603 }
 604
 605 /*
 606  * Generate an rprompt
 607  */
 608 char *
 609 rprompt(void)
 610 {
 611         static char     **rprompt;
 612         static char       buf[MAXPATHLEN];
 613
 614         if (rprompt == NULL) {
 615                 struct option *o;
 616
 617                 o = getoption("rprompt");
 618                 if (o == NULL)
 619                         errx(1, "no such option `rprompt'");
 620                 rprompt = &(o->value);
 621         }
 622         formatbuf(buf, sizeof(buf), *rprompt ? *rprompt : DEFAULTRPROMPT);
 623         return (buf);
 624 }
 625
 626 /*
 627  * Command parser.
 628  */
 629 void
 630 cmdscanner(void)
 631 {
 632         struct cmd      *c;
 633         char            *p;
 634 #ifndef NO_EDITCOMPLETE
 635         int              ch;
 636 #endif
 637         size_t           num;
 638
 639         for (;;) {
 640 #ifndef NO_EDITCOMPLETE
 641                 if (!editing) {
 642 #endif /* !NO_EDITCOMPLETE */
 643                         if (fromatty) {
 644                                 fputs(prompt(), ttyout);
 645                                 p = rprompt();
 646                                 if (*p)
 647                                         fprintf(ttyout, "%s ", p);
 648                                 (void)fflush(ttyout);
 649                         }
 650                         num = getline(stdin, line, sizeof(line), NULL);
 651                         switch (num) {
 652                         case -1:        /* EOF */
 653                         case -2:        /* error */
 654                                 if (fromatty)
 655                                         putc('\n', ttyout);
 656                                 quit(0, NULL);
 657                                 /* NOTREACHED */
 658                         case -3:        /* too long; try again */
 659                                 fputs("Sorry, input line is too long.\n",
 660                                     ttyout);
 661                                 continue;
 662                         case 0:         /* empty; try again */
 663                                 continue;
 664                         default:        /* all ok */
 665                                 break;
 666                         }
 667 #ifndef NO_EDITCOMPLETE
 668                 } else {
 669                         const char *buf;
 670                         HistEvent ev;
 671                         cursor_pos = NULL;
 672
 673                         buf = el_gets(el, &ch);
 674                         num = ch;
 675                         if (buf == NULL || num == 0) {
 676                                 if (fromatty)
 677                                         putc('\n', ttyout);
 678                                 quit(0, NULL);
 679                         }
 680                         if (num >= sizeof(line)) {
 681                                 fputs("Sorry, input line is too long.\n",
 682                                     ttyout);
 683                                 break;
 684                         }
 685                         memcpy(line, buf, num);
 686                         if (line[--num] == '\n') {
 687                                 line[num] = '\0';
 688                                 if (num == 0)
 689                                         break;
 690                         }
 691                         history(hist, &ev, H_ENTER, buf);
 692                 }
 693 #endif /* !NO_EDITCOMPLETE */
 694
 695                 makeargv();
 696                 if (margc == 0)
 697                         continue;
 698                 c = getcmd(margv[0]);
 699                 if (c == (struct cmd *)-1) {
 700                         fputs("?Ambiguous command.\n", ttyout);
 701                         continue;
 702                 }
 703                 if (c == NULL) {
 704 #if !defined(NO_EDITCOMPLETE)
 705                         /*
 706                          * attempt to el_parse() unknown commands.
 707                          * any command containing a ':' would be parsed
 708                          * as "[prog:]cmd ...", and will result in a
 709                          * false positive if prog != "ftp", so treat
 710                          * such commands as invalid.
 711                          */
 712                         if (strchr(margv[0], ':') != NULL ||
 713                             el_parse(el, margc, (const char **)margv) != 0)
 714 #endif /* !NO_EDITCOMPLETE */
 715                                 fputs("?Invalid command.\n", ttyout);
 716                         continue;
 717                 }
 718                 if (c->c_conn && !connected) {
 719                         fputs("Not connected.\n", ttyout);
 720                         continue;
 721                 }
 722                 confirmrest = 0;
 723                 margv[0] = c->c_name;
 724                 (*c->c_handler)(margc, margv);
 725                 if (bell && c->c_bell)
 726                         (void)putc('\007', ttyout);
 727                 if (c->c_handler != help)
 728                         break;
 729         }
 730         (void)xsignal(SIGINT, intr);
 731         (void)xsignal(SIGPIPE, lostpeer);
 732 }
 733
 734 struct cmd *
 735 getcmd(const char *name)
 736 {
 737         const char *p, *q;
 738         struct cmd *c, *found;
 739         int nmatches, longest;
 740
 741         if (name == NULL)
 742                 return (0);
 743
 744         longest = 0;
 745         nmatches = 0;
 746         found = 0;
 747         for (c = cmdtab; (p = c->c_name) != NULL; c++) {
 748                 for (q = name; *q == *p++; q++)
 749                         if (*q == 0)            /* exact match? */
 750                                 return (c);
 751                 if (!*q) {                      /* the name was a prefix */
 752                         if (q - name > longest) {
 753                                 longest = q - name;
 754                                 nmatches = 1;
 755                                 found = c;
 756                         } else if (q - name == longest)
 757                                 nmatches++;
 758                 }
 759         }
 760         if (nmatches > 1)
 761                 return ((struct cmd *)-1);
 762         return (found);
 763 }
 764
 765 /*
 766  * Slice a string up into argc/argv.
 767  */
 768
 769 int slrflag;
 770
 771 void
 772 makeargv(void)
 773 {
 774         char *argp;
 775
 776         stringbase = line;              /* scan from first of buffer */
 777         argbase = argbuf;               /* store from first of buffer */
 778         slrflag = 0;
 779         marg_sl->sl_cur = 0;            /* reset to start of marg_sl */
 780         for (margc = 0; ; margc++) {
 781                 argp = slurpstring();
 782                 ftp_sl_add(marg_sl, argp);
 783                 if (argp == NULL)
 784                         break;
 785         }
 786 #ifndef NO_EDITCOMPLETE
 787         if (cursor_pos == line) {
 788                 cursor_argc = 0;
 789                 cursor_argo = 0;
 790         } else if (cursor_pos != NULL) {
 791                 cursor_argc = margc;
 792                 cursor_argo = strlen(margv[margc-1]);
 793         }
 794 #endif /* !NO_EDITCOMPLETE */
 795 }
 796
 797 #ifdef NO_EDITCOMPLETE
 798 #define INC_CHKCURSOR(x)        (x)++
 799 #else  /* !NO_EDITCOMPLETE */
 800 #define INC_CHKCURSOR(x)        { (x)++ ; \
 801                                 if (x == cursor_pos) { \
 802                                         cursor_argc = margc; \
 803                                         cursor_argo = ap-argbase; \
 804                                         cursor_pos = NULL; \
 805                                 } }
 806
 807 #endif /* !NO_EDITCOMPLETE */
 808
 809 /*
 810  * Parse string into argbuf;
 811  * implemented with FSM to
 812  * handle quoting and strings
 813  */
 814 char *
 815 slurpstring(void)
 816 {
 817         int got_one = 0;
 818         char *sb = stringbase;
 819         char *ap = argbase;
 820         char *tmp = argbase;            /* will return this if token found */
 821
 822         if (*sb == '!' || *sb == '$') { /* recognize ! as a token for shell */
 823                 switch (slrflag) {      /* and $ as token for macro invoke */
 824                         case 0:
 825                                 slrflag++;
 826                                 INC_CHKCURSOR(stringbase);
 827                                 return ((*sb == '!') ? "!" : "$");
 828                                 /* NOTREACHED */
 829                         case 1:
 830                                 slrflag++;
 831                                 altarg = stringbase;
 832                                 break;
 833                         default:
 834                                 break;
 835                 }
 836         }
 837
 838 S0:
 839         switch (*sb) {
 840
 841         case '\0':
 842                 goto OUT;
 843
 844         case ' ':
 845         case '\t':
 846                 INC_CHKCURSOR(sb);
 847                 goto S0;
 848
 849         default:
 850                 switch (slrflag) {
 851                         case 0:
 852                                 slrflag++;
 853                                 break;
 854                         case 1:
 855                                 slrflag++;
 856                                 altarg = sb;
 857                                 break;
 858                         default:
 859                                 break;
 860                 }
 861                 goto S1;
 862         }
 863
 864 S1:
 865         switch (*sb) {
 866
 867         case ' ':
 868         case '\t':
 869         case '\0':
 870                 goto OUT;       /* end of token */
 871
 872         case '\\':
 873                 INC_CHKCURSOR(sb);
 874                 goto S2;        /* slurp next character */
 875
 876         case '"':
 877                 INC_CHKCURSOR(sb);
 878                 goto S3;        /* slurp quoted string */
 879
 880         default:
 881                 *ap = *sb;      /* add character to token */
 882                 ap++;
 883                 INC_CHKCURSOR(sb);
 884                 got_one = 1;
 885                 goto S1;
 886         }
 887
 888 S2:
 889         switch (*sb) {
 890
 891         case '\0':
 892                 goto OUT;
 893
 894         default:
 895                 *ap = *sb;
 896                 ap++;
 897                 INC_CHKCURSOR(sb);
 898                 got_one = 1;
 899                 goto S1;
 900         }
 901
 902 S3:
 903         switch (*sb) {
 904
 905         case '\0':
 906                 goto OUT;
 907
 908         case '"':
 909                 INC_CHKCURSOR(sb);
 910                 goto S1;
 911
 912         default:
 913                 *ap = *sb;
 914                 ap++;
 915                 INC_CHKCURSOR(sb);
 916                 got_one = 1;
 917                 goto S3;
 918         }
 919
 920 OUT:
 921         if (got_one)
 922                 *ap++ = '\0';
 923         argbase = ap;                   /* update storage pointer */
 924         stringbase = sb;                /* update scan pointer */
 925         if (got_one) {
 926                 return (tmp);
 927         }
 928         switch (slrflag) {
 929                 case 0:
 930                         slrflag++;
 931                         break;
 932                 case 1:
 933                         slrflag++;
 934                         altarg = NULL;
 935                         break;
 936                 default:
 937                         break;
 938         }
 939         return (NULL);
 940 }
 941
 942 /*
 943  * Help/usage command.
 944  * Call each command handler with argc == 0 and argv[0] == name.
 945  */
 946 void
 947 help(int argc, char *argv[])
 948 {
 949         struct cmd *c;
 950         char *nargv[1], *p, *cmd;
 951         int isusage;
 952
 953         cmd = argv[0];
 954         isusage = (strcmp(cmd, "usage") == 0);
 955         if (argc == 0 || (isusage && argc == 1)) {
 956                 UPRINTF("usage: %s [command [...]]\n", cmd);
 957                 return;
 958         }
 959         if (argc == 1) {
 960                 StringList *buf;
 961
 962                 buf = ftp_sl_init();
 963                 fprintf(ttyout,
 964                     "%sommands may be abbreviated.  Commands are:\n\n",
 965                     proxy ? "Proxy c" : "C");
 966                 for (c = cmdtab; (p = c->c_name) != NULL; c++)
 967                         if (!proxy || c->c_proxy)
 968                                 ftp_sl_add(buf, p);
 969                 list_vertical(buf);
 970                 sl_free(buf, 0);
 971                 return;
 972         }
 973
 974 #define HELPINDENT ((int) sizeof("disconnect"))
 975
 976         while (--argc > 0) {
 977                 char *arg;
 978
 979                 arg = *++argv;
 980                 c = getcmd(arg);
 981                 if (c == (struct cmd *)-1)
 982                         fprintf(ttyout, "?Ambiguous %s command `%s'\n",
 983                             cmd, arg);
 984                 else if (c == NULL)
 985                         fprintf(ttyout, "?Invalid %s command `%s'\n",
 986                             cmd, arg);
 987                 else {
 988                         if (isusage) {
 989                                 nargv[0] = c->c_name;
 990                                 (*c->c_handler)(0, nargv);
 991                         } else
 992                                 fprintf(ttyout, "%-*s\t%s\n", HELPINDENT,
 993                                     c->c_name, c->c_help);
 994                 }
 995         }
 996 }
 997
 998 struct option *
 999 getoption(const char *name)
1000 {
1001         const char *p;
1002         struct option *c;
1003
1004         if (name == NULL)
1005                 return (NULL);
1006         for (c = optiontab; (p = c->name) != NULL; c++) {
1007                 if (strcasecmp(p, name) == 0)
1008                         return (c);
1009         }
1010         return (NULL);
1011 }
1012
1013 char *
1014 getoptionvalue(const char *name)
1015 {
1016         struct option *c;
1017
1018         if (name == NULL)
1019                 errx(1, "getoptionvalue() invoked with NULL name");
1020         c = getoption(name);
1021         if (c != NULL)
1022                 return (c->value);
1023         errx(1, "getoptionvalue() invoked with unknown option `%s'", name);
1024         /* NOTREACHED */
1025 }
1026
1027 static void
1028 setupoption(char *name, char *value, char *defaultvalue)
1029 {
1030         char *nargv[3];
1031         int overbose;
1032
1033         nargv[0] = "setupoption()";
1034         nargv[1] = name;
1035         nargv[2] = (value ? value : defaultvalue);
1036         overbose = verbose;
1037         verbose = 0;
1038         setoption(3, nargv);
1039         verbose = overbose;
1040 }
1041
1042 void
1043 usage(void)
1044 {
1045         const char *progname = getprogname();
1046
1047         (void)fprintf(stderr,
1048 "usage: %s [-46AadefginpRtvV] [-N netrc] [-o outfile] [-P port] [-q quittime]\n"
1049 "           [-r retry] [-T dir,max[,inc][[user@]host [port]]] [host:path[/]]\n"
1050 "           [file:///file] [ftp://[user[:pass]@]host[:port]/path[/]]\n"
1051 "           [http://[user[:pass]@]host[:port]/path] [...]\n"
1052 "       %s -u URL file [...]\n", progname, progname);
1053         exit(1);
1054 }