wget.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * wget - retrieve a file using HTTP or FTP
   4  *
   5  * Chip Rosenthal Covad Communications <chip@laserlink.net>
   6  *
   7  * Note: According to RFC2616 section 3.6.1, "All HTTP/1.1 applications MUST be
   8  * able to receive and decode the "chunked" transfer-coding, and MUST ignore
   9  * chunk-extension extensions they do not understand."
  10  *
  11  * This prevents this particular wget app from completely RFC compliant, and as
  12  * such, prevents it from being used as a general purpose web browser...  This
  13  * is a design decision, since it makes the code smaller.
  14  *
  15  */
  16
  17 #include <stdio.h>
  18 #include <errno.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <ctype.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <signal.h>
  25 #include <sys/ioctl.h>
  26
  27 #include <sys/time.h>
  28 #include <sys/types.h>
  29 #include <sys/stat.h>
  30 #include <sys/socket.h>
  31 #include <netinet/in.h>
  32 #include <arpa/inet.h>
  33 #include <netdb.h>
  34
  35 #include "busybox.h"
  36
  37 /* Stupid libc5 doesn't define this... */
  38 #ifndef timersub
  39 #define timersub(a, b, result)                                                \
  40   do {                                                                        \
  41     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
  42     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
  43     if ((result)->tv_usec < 0) {                                              \
  44       --(result)->tv_sec;                                                     \
  45       (result)->tv_usec += 1000000;                                           \
  46     }                                                                         \
  47   } while (0)
  48 #endif
  49
  50 struct host_info {
  51         char *host;
  52         int port;
  53         char *path;
  54         int is_ftp;
  55         char *user;
  56 };
  57
  58 static void parse_url(char *url, struct host_info *h);
  59 static FILE *open_socket(char *host, int port);
  60 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
  61 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
  62 static void progressmeter(int flag);
  63
  64 /* Globals (can be accessed from signal handlers */
  65 static off_t filesize = 0;              /* content-length of the file */
  66 #ifdef BB_FEATURE_WGET_STATUSBAR
  67 static char *curfile;                   /* Name of current file being transferred. */
  68 static struct timeval start;    /* Time a transfer started. */
  69 static volatile unsigned long statbytes; /* Number of bytes transferred so far. */
  70 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
  71 static const int STALLTIME = 5;
  72 #endif
  73
  74 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
  75 {
  76         if (output != stdout && do_continue==0) {
  77                 fclose(output);
  78                 unlink(fname_out);
  79         }
  80 }
  81
  82 #define close_delete_and_die(s...) { \
  83         close_and_delete_outfile(output, fname_out, do_continue); \
  84         error_msg_and_die(s); }
  85
  86
  87 #ifdef BB_FEATURE_WGET_AUTHENTICATION
  88 /*
  89  *  Base64-encode character string
  90  *  oops... isn't something similar in uuencode.c?
  91  *  It would be better to use already existing code
  92  */
  93 char *base64enc(char *p, char *buf, int len) {
  94
  95         char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
  96                     "0123456789+/";
  97                 char *s = buf;
  98
  99         while(*p) {
 100                                 if (s >= buf+len-4)
 101                                         error_msg_and_die("buffer overflow");
 102                 *(s++) = al[(*p >> 2) & 0x3F];
 103                 *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
 104                 *s = *(s+1) = '=';
 105                 *(s+2) = 0;
 106                 if (! *(++p)) break;
 107                 *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
 108                 if (! *(++p)) break;
 109                 *(s++) = al[*(p++) & 0x3F];
 110         }
 111
 112                 return buf;
 113 }
 114 #endif
 115
 116 int wget_main(int argc, char **argv)
 117 {
 118         int n, try=5, status;
 119         int port;
 120         char *proxy;
 121         char *s, buf[512];
 122         struct stat sbuf;
 123
 124         struct host_info server, target;
 125
 126         FILE *sfp = NULL;                       /* socket to web/ftp server                     */
 127         FILE *dfp = NULL;                       /* socket to ftp server (data)          */
 128         char *fname_out = NULL;         /* where to direct output (-O)          */
 129         int do_continue = 0;            /* continue a prev transfer (-c)        */
 130         long beg_range = 0L;            /*   range at which continue begins     */
 131         int got_clen = 0;                       /* got content-length: from server      */
 132         FILE *output;                           /* socket to web server                         */
 133         int quiet_flag = FALSE;         /* Be verry, verry quiet...                     */
 134
 135         /*
 136          * Crack command line.
 137          */
 138         while ((n = getopt(argc, argv, "cqO:")) != EOF) {
 139                 switch (n) {
 140                 case 'c':
 141                         ++do_continue;
 142                         break;
 143                 case 'q':
 144                         quiet_flag = TRUE;
 145                         break;
 146                 case 'O':
 147                         /* can't set fname_out to NULL if outputting to stdout, because
 148                          * this gets interpreted as the auto-gen output filename
 149                          * case below  - tausq@debian.org
 150                          */
 151                         fname_out = (strcmp(optarg, "-") == 0 ? (char *)1 : optarg);
 152                         break;
 153                 default:
 154                         show_usage();
 155                 }
 156         }
 157
 158         if (argc - optind != 1)
 159                         show_usage();
 160
 161         parse_url(argv[optind], &target);
 162         server.host = target.host;
 163         server.port = target.port;
 164
 165         /*
 166          * Use the proxy if necessary.
 167          */
 168         proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
 169         if (proxy)
 170                 parse_url(xstrdup(proxy), &server);
 171
 172         /* Guess an output filename */
 173         if (!fname_out) {
 174                 fname_out =
 175 #ifdef BB_FEATURE_WGET_STATUSBAR
 176                         curfile =
 177 #endif
 178                         get_last_path_component(target.path);
 179                 if (fname_out==NULL || strlen(fname_out)<1) {
 180                         fname_out =
 181 #ifdef BB_FEATURE_WGET_STATUSBAR
 182                                 curfile =
 183 #endif
 184                                 "index.html";
 185                 }
 186 #ifdef BB_FEATURE_WGET_STATUSBAR
 187         } else {
 188                 curfile = get_last_path_component(fname_out);
 189 #endif
 190         }
 191         if (do_continue && !fname_out)
 192                 error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
 193
 194
 195         /*
 196          * Open the output file stream.
 197          */
 198         if (fname_out != (char *)1) {
 199                 output = xfopen( fname_out, (do_continue ? "a" : "w") );
 200         } else {
 201                 output = stdout;
 202         }
 203
 204         /*
 205          * Determine where to start transfer.
 206          */
 207         if (do_continue) {
 208                 if (fstat(fileno(output), &sbuf) < 0)
 209                         perror_msg_and_die("fstat()");
 210                 if (sbuf.st_size > 0)
 211                         beg_range = sbuf.st_size;
 212                 else
 213                         do_continue = 0;
 214         }
 215
 216         if (proxy || !target.is_ftp) {
 217                 /*
 218                  *  HTTP session
 219                  */
 220                 do {
 221                         if (! --try)
 222                                 close_delete_and_die("too many redirections");
 223
 224                         /*
 225                          * Open socket to http server
 226                          */
 227                         if (sfp) fclose(sfp);
 228                         sfp = open_socket(server.host, server.port);
 229
 230                         /*
 231                          * Send HTTP request.
 232                          */
 233                         if (proxy) {
 234                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.0\r\n",
 235                                         target.is_ftp ? "f" : "ht", target.host,
 236                                         target.port, target.path);
 237                         } else {
 238                                 fprintf(sfp, "GET /%s HTTP/1.0\r\n", target.path);
 239                         }
 240
 241                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
 242
 243 #ifdef BB_FEATURE_WGET_AUTHENTICATION
 244                         if (target.user) {
 245                                 fprintf(sfp, "Authorization: Basic %s\r\n",
 246                                         base64enc(target.user, buf, sizeof(buf)));
 247                         }
 248                         if (proxy && server.user) {
 249                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
 250                                         base64enc(server.user, buf, sizeof(buf)));
 251                         }
 252 #endif
 253
 254                         if (do_continue)
 255                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
 256                         fprintf(sfp,"Connection: close\r\n\r\n");
 257
 258                         /*
 259                         * Retrieve HTTP response line and check for "200" status code.
 260                         */
 261                         if (fgets(buf, sizeof(buf), sfp) == NULL)
 262                                 close_delete_and_die("no response from server");
 263
 264                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
 265                         ;
 266                         for ( ; isspace(*s) ; ++s)
 267                         ;
 268                         switch (status = atoi(s)) {
 269                                 case 0:
 270                                 case 200:
 271                                         if (do_continue && output != stdout)
 272                                                 output = freopen(fname_out, "w", output);
 273                                         do_continue = 0;
 274                                         break;
 275                                 case 300:       /* redirection */
 276                                 case 301:
 277                                 case 302:
 278                                 case 303:
 279                                         break;
 280                                 case 206:
 281                                         if (do_continue)
 282                                                 break;
 283                                         /*FALLTHRU*/
 284                                 default:
 285                                         chomp(buf);
 286                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
 287                         }
 288
 289                         /*
 290                          * Retrieve HTTP headers.
 291                          */
 292                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
 293                                 if (strcasecmp(buf, "content-length") == 0) {
 294                                         filesize = atol(s);
 295                                         got_clen = 1;
 296                                         continue;
 297                                 }
 298                                 if (strcasecmp(buf, "transfer-encoding") == 0)
 299                                         close_delete_and_die("server wants to do %s transfer encoding", s);
 300
 301                                 if (strcasecmp(buf, "location") == 0) {
 302                                         if (s[0] == '/')
 303                                                 target.path = xstrdup(s+1);
 304                                         else {
 305                                                 parse_url(xstrdup(s), &target);
 306                                                 if (!proxy) {
 307                                                         server.host = target.host;
 308                                                         server.port = target.port;
 309                                                 }
 310                                         }
 311                                 }
 312                         }
 313                 } while(status >= 300);
 314
 315                 dfp = sfp;
 316         }
 317         else
 318         {
 319                 /*
 320                  *  FTP session
 321                  */
 322                 if (! target.user)
 323                         target.user = xstrdup("anonymous:busybox@");
 324
 325                 sfp = open_socket(server.host, server.port);
 326                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
 327                         close_delete_and_die("%s", buf+4);
 328
 329                 /*
 330                  * Splitting username:password pair,
 331                  * trying to log in
 332                  */
 333                 s = strchr(target.user, ':');
 334                 if (s)
 335                         *(s++) = '\0';
 336                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
 337                         case 230:
 338                                 break;
 339                         case 331:
 340                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
 341                                         break;
 342                                 /* FALLTHRU (failed login) */
 343                         default:
 344                                 close_delete_and_die("ftp login: %s", buf+4);
 345                 }
 346
 347                 ftpcmd("CDUP", NULL, sfp, buf);
 348                 ftpcmd("TYPE I", NULL, sfp, buf);
 349
 350                 /*
 351                  * Querying file size
 352                  */
 353                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
 354                         filesize = atol(buf+4);
 355                         got_clen = 1;
 356                 }
 357
 358                 /*
 359                  * Entering passive mode
 360                  */
 361                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
 362                         close_delete_and_die("PASV: %s", buf+4);
 363                 s = strrchr(buf, ',');
 364                 *s = 0;
 365                 port = atoi(s+1);
 366                 s = strrchr(buf, ',');
 367                 port += atoi(s+1) * 256;
 368                 dfp = open_socket(server.host, port);
 369
 370                 if (do_continue) {
 371                         sprintf(buf, "REST %ld", beg_range);
 372                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
 373                                 if (output != stdout)
 374                                         output = freopen(fname_out, "w", output);
 375                                 do_continue = 0;
 376                         } else
 377                                 filesize -= beg_range;
 378                 }
 379
 380                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
 381                         close_delete_and_die("RETR: %s", buf+4);
 382
 383         }
 384
 385
 386         /*
 387          * Retrieve file
 388          */
 389 #ifdef BB_FEATURE_WGET_STATUSBAR
 390         statbytes=0;
 391         if (quiet_flag==FALSE)
 392                 progressmeter(-1);
 393 #endif
 394         while ((filesize > 0 || !got_clen) && (n = fread(buf, 1, sizeof(buf), dfp)) > 0) {
 395                 fwrite(buf, 1, n, output);
 396 #ifdef BB_FEATURE_WGET_STATUSBAR
 397                 statbytes+=n;
 398                 if (quiet_flag==FALSE)
 399                         progressmeter(1);
 400 #endif
 401                 if (got_clen)
 402                         filesize -= n;
 403         }
 404
 405         if (n == 0 && ferror(dfp))
 406                 perror_msg_and_die("network read error");
 407
 408         if (!proxy && target.is_ftp) {
 409                 fclose(dfp);
 410                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
 411                         error_msg_and_die("ftp error: %s", buf+4);
 412                 ftpcmd("QUIT", NULL, sfp, buf);
 413         }
 414
 415         exit(EXIT_SUCCESS);
 416 }
 417
 418
 419 void parse_url(char *url, struct host_info *h)
 420 {
 421         char *cp, *sp, *up;
 422
 423         if (strncmp(url, "http://", 7) == 0) {
 424                 h->port = 80;
 425                 h->host = url + 7;
 426                 h->is_ftp = 0;
 427         } else if (strncmp(url, "ftp://", 6) == 0) {
 428                 h->port = 21;
 429                 h->host = url + 6;
 430                 h->is_ftp = 1;
 431         } else
 432                 error_msg_and_die("not an http or ftp url: %s", url);
 433
 434         sp = strchr(h->host, '/');
 435         if (sp != NULL) {
 436                 *sp++ = '\0';
 437                 h->path = sp;
 438         } else
 439                 h->path = "";
 440
 441         up = strrchr(h->host, '@');
 442         if (up != NULL) {
 443                 h->user = h->host;
 444                 *up++ = '\0';
 445                 h->host = up;
 446         } else
 447                 h->user = NULL;
 448
 449         cp = strchr(h->host, ':');
 450         if (cp != NULL) {
 451                 *cp++ = '\0';
 452                 h->port = atoi(cp);
 453         }
 454
 455 }
 456
 457
 458 FILE *open_socket(char *host, int port)
 459 {
 460         struct sockaddr_in s_in;
 461         struct hostent *hp;
 462         int fd;
 463         FILE *fp;
 464
 465         memset(&s_in, 0, sizeof(s_in));
 466         s_in.sin_family = AF_INET;
 467         if ((hp = (struct hostent *) gethostbyname(host)) == NULL)
 468                 error_msg_and_die("cannot resolve %s", host);
 469         memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
 470         s_in.sin_port = htons(port);
 471
 472         /*
 473          * Get the server onto a stdio stream.
 474          */
 475         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 476                 perror_msg_and_die("socket()");
 477         if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
 478                 perror_msg_and_die("connect(%s)", host);
 479         if ((fp = fdopen(fd, "r+")) == NULL)
 480                 perror_msg_and_die("fdopen()");
 481
 482         return fp;
 483 }
 484
 485
 486 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
 487 {
 488         char *s, *hdrval;
 489         int c;
 490
 491         *istrunc = 0;
 492
 493         /* retrieve header line */
 494         if (fgets(buf, bufsiz, fp) == NULL)
 495                 return NULL;
 496
 497         /* see if we are at the end of the headers */
 498         for (s = buf ; *s == '\r' ; ++s)
 499                 ;
 500         if (s[0] == '\n')
 501                 return NULL;
 502
 503         /* convert the header name to lower case */
 504         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
 505                 *s = tolower(*s);
 506
 507         /* verify we are at the end of the header name */
 508         if (*s != ':')
 509                 error_msg_and_die("bad header line: %s", buf);
 510
 511         /* locate the start of the header value */
 512         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
 513                 ;
 514         hdrval = s;
 515
 516         /* locate the end of header */
 517         while (*s != '\0' && *s != '\r' && *s != '\n')
 518                 ++s;
 519
 520         /* end of header found */
 521         if (*s != '\0') {
 522                 *s = '\0';
 523                 return hdrval;
 524         }
 525
 526         /* Rats!  The buffer isn't big enough to hold the entire header value. */
 527         while (c = getc(fp), c != EOF && c != '\n')
 528                 ;
 529         *istrunc = 1;
 530         return hdrval;
 531 }
 532
 533 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
 534 {
 535         char *p;
 536
 537         if (s1) {
 538                 if (!s2) s2="";
 539                 fprintf(fp, "%s%s\n", s1, s2);
 540                 fflush(fp);
 541         }
 542
 543         do {
 544                 p = fgets(buf, 510, fp);
 545                 if (!p)
 546                         perror_msg_and_die("fgets()");
 547         } while (! isdigit(buf[0]) || buf[3] != ' ');
 548
 549         return atoi(buf);
 550 }
 551
 552 #ifdef BB_FEATURE_WGET_STATUSBAR
 553 /* Stuff below is from BSD rcp util.c, as added to openshh.
 554  * Original copyright notice is retained at the end of this file.
 555  *
 556  */
 557
 558
 559 static int
 560 getttywidth(void)
 561 {
 562         struct winsize winsize;
 563
 564         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
 565                 return (winsize.ws_col ? winsize.ws_col : 80);
 566         else
 567                 return (80);
 568 }
 569
 570 static void
 571 updateprogressmeter(int ignore)
 572 {
 573         int save_errno = errno;
 574
 575         progressmeter(0);
 576         errno = save_errno;
 577 }
 578
 579 static void
 580 alarmtimer(int wait)
 581 {
 582         struct itimerval itv;
 583
 584         itv.it_value.tv_sec = wait;
 585         itv.it_value.tv_usec = 0;
 586         itv.it_interval = itv.it_value;
 587         setitimer(ITIMER_REAL, &itv, NULL);
 588 }
 589
 590
 591 static void
 592 progressmeter(int flag)
 593 {
 594         static const char prefixes[] = " KMGTP";
 595         static struct timeval lastupdate;
 596         static off_t lastsize;
 597         struct timeval now, td, wait;
 598         off_t cursize, abbrevsize;
 599         double elapsed;
 600         int ratio, barlength, i, remaining;
 601         char buf[256];
 602
 603         if (flag == -1) {
 604                 (void) gettimeofday(&start, (struct timezone *) 0);
 605                 lastupdate = start;
 606                 lastsize = 0;
 607         }
 608
 609         (void) gettimeofday(&now, (struct timezone *) 0);
 610         cursize = statbytes;
 611         if (filesize != 0) {
 612                 ratio = 100.0 * cursize / filesize;
 613                 ratio = MAX(ratio, 0);
 614                 ratio = MIN(ratio, 100);
 615         } else
 616                 ratio = 100;
 617
 618         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
 619
 620         barlength = getttywidth() - 51;
 621         if (barlength > 0) {
 622                 i = barlength * ratio / 100;
 623                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 624                          "|%.*s%*s|", i,
 625                          "*****************************************************************************"
 626                          "*****************************************************************************",
 627                          barlength - i, "");
 628         }
 629         i = 0;
 630         abbrevsize = cursize;
 631         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
 632                 i++;
 633                 abbrevsize >>= 10;
 634         }
 635         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
 636              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
 637                  'B');
 638
 639         timersub(&now, &lastupdate, &wait);
 640         if (cursize > lastsize) {
 641                 lastupdate = now;
 642                 lastsize = cursize;
 643                 if (wait.tv_sec >= STALLTIME) {
 644                         start.tv_sec += wait.tv_sec;
 645                         start.tv_usec += wait.tv_usec;
 646                 }
 647                 wait.tv_sec = 0;
 648         }
 649         timersub(&now, &start, &td);
 650         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
 651
 652         if (statbytes <= 0 || elapsed <= 0.0 || cursize > filesize) {
 653                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 654                          "   --:-- ETA");
 655         } else if (wait.tv_sec >= STALLTIME) {
 656                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 657                          " - stalled -");
 658         } else {
 659                 remaining = (int) (filesize / (statbytes / elapsed) - elapsed);
 660                 i = remaining / 3600;
 661                 if (i)
 662                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 663                                  "%2d:", i);
 664                 else
 665                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 666                                  "   ");
 667                 i = remaining % 3600;
 668                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 669                          "%02d:%02d ETA", i / 60, i % 60);
 670         }
 671         write(fileno(stderr), buf, strlen(buf));
 672
 673         if (flag == -1) {
 674                 struct sigaction sa;
 675                 sa.sa_handler = updateprogressmeter;
 676                 sigemptyset(&sa.sa_mask);
 677                 sa.sa_flags = SA_RESTART;
 678                 sigaction(SIGALRM, &sa, NULL);
 679                 alarmtimer(1);
 680         } else if (flag == 1) {
 681                 alarmtimer(0);
 682                 statbytes = 0;
 683         }
 684 }
 685 #endif
 686
 687 /* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
 688  * much of which was blatently stolen from openssh.  */
 689
 690 /*-
 691  * Copyright (c) 1992, 1993
 692  *      The Regents of the University of California.  All rights reserved.
 693  *
 694  * Redistribution and use in source and binary forms, with or without
 695  * modification, are permitted provided that the following conditions
 696  * are met:
 697  * 1. Redistributions of source code must retain the above copyright
 698  *    notice, this list of conditions and the following disclaimer.
 699  * 2. Redistributions in binary form must reproduce the above copyright
 700  *    notice, this list of conditions and the following disclaimer in the
 701  *    documentation and/or other materials provided with the distribution.
 702  *
 703  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 704  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 705  *
 706  * 4. Neither the name of the University nor the names of its contributors
 707  *    may be used to endorse or promote products derived from this software
 708  *    without specific prior written permission.
 709  *
 710  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 711  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 712  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 713  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 714  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 715  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 716  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 717  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 718  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 719  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 720  * SUCH DAMAGE.
 721  *
 722  *      $Id: wget.c,v 1.31 2001/04/05 21:45:53 andersen Exp $
 723  */
 724
 725
 726
 727 /*
 728 Local Variables:
 729 c-file-style: "linux"
 730 c-basic-offset: 4
 731 tab-width: 4
 732 End:
 733 */
 734
 735
 736