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  */
   8
   9 #include <stdio.h>
  10 #include <errno.h>
  11 #include <stdlib.h>
  12 #include <unistd.h>
  13 #include <ctype.h>
  14 #include <string.h>
  15 #include <unistd.h>
  16 #include <signal.h>
  17 #include <sys/ioctl.h>
  18
  19 #include <sys/time.h>
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <sys/socket.h>
  23 #include <netinet/in.h>
  24 #include <arpa/inet.h>
  25 #include <netdb.h>
  26
  27 #ifndef _GNU_SOURCE
  28 #define _GNU_SOURCE
  29 #endif
  30 #include <getopt.h>
  31
  32 #include "busybox.h"
  33
  34 /* Stupid libc5 doesn't define this... */
  35 #ifndef timersub
  36 #define timersub(a, b, result)                                                \
  37   do {                                                                        \
  38     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
  39     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
  40     if ((result)->tv_usec < 0) {                                              \
  41       --(result)->tv_sec;                                                     \
  42       (result)->tv_usec += 1000000;                                           \
  43     }                                                                         \
  44   } while (0)
  45 #endif
  46
  47 struct host_info {
  48         char *host;
  49         int port;
  50         char *path;
  51         int is_ftp;
  52         char *user;
  53 };
  54
  55 static void parse_url(char *url, struct host_info *h);
  56 static FILE *open_socket(char *host, int port);
  57 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
  58 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
  59 static void progressmeter(int flag);
  60
  61 /* Globals (can be accessed from signal handlers */
  62 static off_t filesize = 0;              /* content-length of the file */
  63 static int chunked = 0;                 /* chunked transfer encoding */
  64 #ifdef BB_FEATURE_WGET_STATUSBAR
  65 static char *curfile;                   /* Name of current file being transferred. */
  66 static struct timeval start;    /* Time a transfer started. */
  67 static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
  68 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
  69 static const int STALLTIME = 5;
  70 #endif
  71
  72 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
  73 {
  74         if (output != stdout && do_continue==0) {
  75                 fclose(output);
  76                 unlink(fname_out);
  77         }
  78 }
  79
  80 /* Read NMEMB elements of SIZE bytes into PTR from STREAM.  Returns the
  81  * number of elements read, and a short count if an eof or non-interrupt
  82  * error is encountered.  */
  83 static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
  84 {
  85         size_t ret = 0;
  86
  87         do {
  88                 clearerr(stream);
  89                 ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
  90         } while (ret < nmemb && ferror(stream) && errno == EINTR);
  91
  92         return ret;
  93 }
  94
  95 /* Write NMEMB elements of SIZE bytes from PTR to STREAM.  Returns the
  96  * number of elements written, and a short count if an eof or non-interrupt
  97  * error is encountered.  */
  98 static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream)
  99 {
 100         size_t ret = 0;
 101
 102         do {
 103                 clearerr(stream);
 104                 ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
 105         } while (ret < nmemb && ferror(stream) && errno == EINTR);
 106
 107         return ret;
 108 }
 109
 110 /* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM.
 111  * Returns S, or NULL if an eof or non-interrupt error is encountered.  */
 112 static char *safe_fgets(char *s, int size, FILE *stream)
 113 {
 114         char *ret;
 115
 116         do {
 117                 clearerr(stream);
 118                 ret = fgets(s, size, stream);
 119         } while (ret == NULL && ferror(stream) && errno == EINTR);
 120
 121         return ret;
 122 }
 123
 124 #define close_delete_and_die(s...) { \
 125         close_and_delete_outfile(output, fname_out, do_continue); \
 126         error_msg_and_die(s); }
 127
 128
 129 #ifdef BB_FEATURE_WGET_AUTHENTICATION
 130 /*
 131  *  Base64-encode character string
 132  *  oops... isn't something similar in uuencode.c?
 133  *  It would be better to use already existing code
 134  */
 135 char *base64enc(char *p, char *buf, int len) {
 136
 137         char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
 138                     "0123456789+/";
 139                 char *s = buf;
 140
 141         while(*p) {
 142                                 if (s >= buf+len-4)
 143                                         error_msg_and_die("buffer overflow");
 144                 *(s++) = al[(*p >> 2) & 0x3F];
 145                 *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
 146                 *s = *(s+1) = '=';
 147                 *(s+2) = 0;
 148                 if (! *(++p)) break;
 149                 *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
 150                 if (! *(++p)) break;
 151                 *(s++) = al[*(p++) & 0x3F];
 152         }
 153
 154                 return buf;
 155 }
 156 #endif
 157
 158 int wget_main(int argc, char **argv)
 159 {
 160         int n, try=5, status;
 161         int port;
 162         char *proxy;
 163         char *s, buf[512];
 164         struct stat sbuf;
 165         char extra_headers[1024];
 166         char *extra_headers_ptr = extra_headers;
 167         int extra_headers_left = sizeof(extra_headers);
 168         int which_long_opt = 0, option_index = -1;
 169         struct host_info server, target;
 170
 171         FILE *sfp = NULL;                       /* socket to web/ftp server                     */
 172         FILE *dfp = NULL;                       /* socket to ftp server (data)          */
 173         char *fname_out = NULL;         /* where to direct output (-O)          */
 174         int do_continue = 0;            /* continue a prev transfer (-c)        */
 175         long beg_range = 0L;            /*   range at which continue begins     */
 176         int got_clen = 0;                       /* got content-length: from server      */
 177         FILE *output;                           /* socket to web server                         */
 178         int quiet_flag = FALSE;         /* Be verry, verry quiet...                     */
 179
 180 #define LONG_HEADER     1
 181         struct option long_options[] = {
 182                 { "continue",           0, NULL, 'c' },
 183                 { "quiet",              0, NULL, 'q' },
 184                 { "output-document",    1, NULL, 'O' },
 185                 { "header",             1, &which_long_opt, LONG_HEADER },
 186                 { 0,                    0, 0, 0 }
 187         };
 188         /*
 189          * Crack command line.
 190          */
 191         while ((n = getopt_long(argc, argv, "cqO:", long_options, &option_index)) != EOF) {
 192                 switch (n) {
 193                 case 'c':
 194                         ++do_continue;
 195                         break;
 196                 case 'q':
 197                         quiet_flag = TRUE;
 198                         break;
 199                 case 'O':
 200                         /* can't set fname_out to NULL if outputting to stdout, because
 201                          * this gets interpreted as the auto-gen output filename
 202                          * case below  - tausq@debian.org
 203                          */
 204                         fname_out = optarg;
 205                         break;
 206                 case 0:
 207                         switch (which_long_opt) {
 208                                 case LONG_HEADER: {
 209                                         int arglen = strlen(optarg);
 210                                         if(extra_headers_left - arglen - 2 <= 0)
 211                                                 error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
 212                                         strcpy(extra_headers_ptr, optarg);
 213                                         extra_headers_ptr += arglen;
 214                                         extra_headers_left -= ( arglen + 2 );
 215                                         *extra_headers_ptr++ = '\r';
 216                                         *extra_headers_ptr++ = '\n';
 217                                         *(extra_headers_ptr + 1) = 0;
 218                                         break;
 219                                 }
 220                         }
 221                         break;
 222                 default:
 223                         show_usage();
 224                 }
 225         }
 226
 227         fprintf(stderr, "extra_headers='%s'\n", extra_headers);
 228         if (argc - optind != 1)
 229                         show_usage();
 230
 231         parse_url(argv[optind], &target);
 232         server.host = target.host;
 233         server.port = target.port;
 234
 235         /*
 236          * Use the proxy if necessary.
 237          */
 238         proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
 239         if (proxy)
 240                 parse_url(xstrdup(proxy), &server);
 241
 242         /* Guess an output filename */
 243         if (!fname_out) {
 244                 fname_out =
 245 #ifdef BB_FEATURE_WGET_STATUSBAR
 246                         curfile =
 247 #endif
 248                         get_last_path_component(target.path);
 249                 if (fname_out==NULL || strlen(fname_out)<1) {
 250                         fname_out =
 251 #ifdef BB_FEATURE_WGET_STATUSBAR
 252                                 curfile =
 253 #endif
 254                                 "index.html";
 255                 }
 256 #ifdef BB_FEATURE_WGET_STATUSBAR
 257         } else {
 258                 curfile = get_last_path_component(fname_out);
 259 #endif
 260         }
 261         if (do_continue && !fname_out)
 262                 error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
 263
 264
 265         /*
 266          * Open the output file stream.
 267          */
 268         if (strcmp(fname_out, "-") == 0) {
 269                 output = stdout;
 270                 quiet_flag = TRUE;
 271         } else {
 272                 output = xfopen(fname_out, (do_continue ? "a" : "w"));
 273         }
 274
 275         /*
 276          * Determine where to start transfer.
 277          */
 278         if (do_continue) {
 279                 if (fstat(fileno(output), &sbuf) < 0)
 280                         perror_msg_and_die("fstat()");
 281                 if (sbuf.st_size > 0)
 282                         beg_range = sbuf.st_size;
 283                 else
 284                         do_continue = 0;
 285         }
 286
 287         if (proxy || !target.is_ftp) {
 288                 /*
 289                  *  HTTP session
 290                  */
 291                 do {
 292                         if (! --try)
 293                                 close_delete_and_die("too many redirections");
 294
 295                         /*
 296                          * Open socket to http server
 297                          */
 298                         if (sfp) fclose(sfp);
 299                         sfp = open_socket(server.host, server.port);
 300
 301                         /*
 302                          * Send HTTP request.
 303                          */
 304                         if (proxy) {
 305                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
 306                                         target.is_ftp ? "f" : "ht", target.host,
 307                                         target.port, target.path);
 308                         } else {
 309                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
 310                         }
 311
 312                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
 313
 314 #ifdef BB_FEATURE_WGET_AUTHENTICATION
 315                         if (target.user) {
 316                                 fprintf(sfp, "Authorization: Basic %s\r\n",
 317                                         base64enc(target.user, buf, sizeof(buf)));
 318                         }
 319                         if (proxy && server.user) {
 320                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
 321                                         base64enc(server.user, buf, sizeof(buf)));
 322                         }
 323 #endif
 324
 325                         if (do_continue)
 326                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
 327                         if(extra_headers_left < sizeof(extra_headers))
 328                                 fputs(extra_headers,sfp);
 329                         fprintf(sfp,"Connection: close\r\n\r\n");
 330
 331                         /*
 332                         * Retrieve HTTP response line and check for "200" status code.
 333                         */
 334 read_response:          if (fgets(buf, sizeof(buf), sfp) == NULL)
 335                                 close_delete_and_die("no response from server");
 336
 337                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
 338                         ;
 339                         for ( ; isspace(*s) ; ++s)
 340                         ;
 341                         switch (status = atoi(s)) {
 342                                 case 0:
 343                                 case 100:
 344                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
 345                                         goto read_response;
 346                                 case 200:
 347                                         if (do_continue && output != stdout)
 348                                                 output = freopen(fname_out, "w", output);
 349                                         do_continue = 0;
 350                                         break;
 351                                 case 300:       /* redirection */
 352                                 case 301:
 353                                 case 302:
 354                                 case 303:
 355                                         break;
 356                                 case 206:
 357                                         if (do_continue)
 358                                                 break;
 359                                         /*FALLTHRU*/
 360                                 default:
 361                                         chomp(buf);
 362                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
 363                         }
 364
 365                         /*
 366                          * Retrieve HTTP headers.
 367                          */
 368                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
 369                                 if (strcasecmp(buf, "content-length") == 0) {
 370                                         filesize = atol(s);
 371                                         got_clen = 1;
 372                                         continue;
 373                                 }
 374                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
 375                                         if (strcasecmp(s, "chunked") == 0) {
 376                                                 chunked = got_clen = 1;
 377                                         } else {
 378                                         close_delete_and_die("server wants to do %s transfer encoding", s);
 379                                         }
 380                                 }
 381                                 if (strcasecmp(buf, "location") == 0) {
 382                                         if (s[0] == '/')
 383                                                 target.path = xstrdup(s+1);
 384                                         else {
 385                                                 parse_url(xstrdup(s), &target);
 386                                                 if (!proxy) {
 387                                                         server.host = target.host;
 388                                                         server.port = target.port;
 389                                                 }
 390                                         }
 391                                 }
 392                         }
 393                 } while(status >= 300);
 394
 395                 dfp = sfp;
 396         }
 397         else
 398         {
 399                 /*
 400                  *  FTP session
 401                  */
 402                 if (! target.user)
 403                         target.user = xstrdup("anonymous:busybox@");
 404
 405                 sfp = open_socket(server.host, server.port);
 406                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
 407                         close_delete_and_die("%s", buf+4);
 408
 409                 /*
 410                  * Splitting username:password pair,
 411                  * trying to log in
 412                  */
 413                 s = strchr(target.user, ':');
 414                 if (s)
 415                         *(s++) = '\0';
 416                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
 417                         case 230:
 418                                 break;
 419                         case 331:
 420                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
 421                                         break;
 422                                 /* FALLTHRU (failed login) */
 423                         default:
 424                                 close_delete_and_die("ftp login: %s", buf+4);
 425                 }
 426
 427                 ftpcmd("CDUP", NULL, sfp, buf);
 428                 ftpcmd("TYPE I", NULL, sfp, buf);
 429
 430                 /*
 431                  * Querying file size
 432                  */
 433                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
 434                         filesize = atol(buf+4);
 435                         got_clen = 1;
 436                 }
 437
 438                 /*
 439                  * Entering passive mode
 440                  */
 441                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
 442                         close_delete_and_die("PASV: %s", buf+4);
 443                 s = strrchr(buf, ',');
 444                 *s = 0;
 445                 port = atoi(s+1);
 446                 s = strrchr(buf, ',');
 447                 port += atoi(s+1) * 256;
 448                 dfp = open_socket(server.host, port);
 449
 450                 if (do_continue) {
 451                         sprintf(buf, "REST %ld", beg_range);
 452                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
 453                                 if (output != stdout)
 454                                         output = freopen(fname_out, "w", output);
 455                                 do_continue = 0;
 456                         } else
 457                                 filesize -= beg_range;
 458                 }
 459
 460                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
 461                         close_delete_and_die("RETR: %s", buf+4);
 462
 463         }
 464
 465
 466         /*
 467          * Retrieve file
 468          */
 469         if (chunked) {
 470                 fgets(buf, sizeof(buf), dfp);
 471                 filesize = strtol(buf, (char **) NULL, 16);
 472         }
 473 #ifdef BB_FEATURE_WGET_STATUSBAR
 474         if (quiet_flag==FALSE)
 475                 progressmeter(-1);
 476 #endif
 477         do {
 478                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
 479                 safe_fwrite(buf, 1, n, output);
 480 #ifdef BB_FEATURE_WGET_STATUSBAR
 481                 statbytes+=n;
 482 #endif
 483                 if (got_clen)
 484                         filesize -= n;
 485         }
 486
 487                 if (chunked) {
 488                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
 489                         safe_fgets(buf, sizeof(buf), dfp);
 490                         filesize = strtol(buf, (char **) NULL, 16);
 491                         if (filesize==0) chunked = 0; /* all done! */
 492                 }
 493
 494         if (n == 0 && ferror(dfp))
 495                 perror_msg_and_die("network read error");
 496         } while (chunked);
 497 #ifdef BB_FEATURE_WGET_STATUSBAR
 498         if (quiet_flag==FALSE)
 499                 progressmeter(1);
 500 #endif
 501         if (!proxy && target.is_ftp) {
 502                 fclose(dfp);
 503                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
 504                         error_msg_and_die("ftp error: %s", buf+4);
 505                 ftpcmd("QUIT", NULL, sfp, buf);
 506         }
 507         exit(EXIT_SUCCESS);
 508 }
 509
 510
 511 void parse_url(char *url, struct host_info *h)
 512 {
 513         char *cp, *sp, *up;
 514
 515         if (strncmp(url, "http://", 7) == 0) {
 516                 h->port = 80;
 517                 h->host = url + 7;
 518                 h->is_ftp = 0;
 519         } else if (strncmp(url, "ftp://", 6) == 0) {
 520                 h->port = 21;
 521                 h->host = url + 6;
 522                 h->is_ftp = 1;
 523         } else
 524                 error_msg_and_die("not an http or ftp url: %s", url);
 525
 526         sp = strchr(h->host, '/');
 527         if (sp != NULL) {
 528                 *sp++ = '\0';
 529                 h->path = sp;
 530         } else
 531                 h->path = "";
 532
 533         up = strrchr(h->host, '@');
 534         if (up != NULL) {
 535                 h->user = h->host;
 536                 *up++ = '\0';
 537                 h->host = up;
 538         } else
 539                 h->user = NULL;
 540
 541         cp = strchr(h->host, ':');
 542         if (cp != NULL) {
 543                 *cp++ = '\0';
 544                 h->port = atoi(cp);
 545         }
 546
 547 }
 548
 549
 550 FILE *open_socket(char *host, int port)
 551 {
 552         struct sockaddr_in s_in;
 553         struct hostent *hp;
 554         int fd;
 555         FILE *fp;
 556
 557         memset(&s_in, 0, sizeof(s_in));
 558         s_in.sin_family = AF_INET;
 559         hp = xgethostbyname(host);
 560         memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
 561         s_in.sin_port = htons(port);
 562
 563         /*
 564          * Get the server onto a stdio stream.
 565          */
 566         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 567                 perror_msg_and_die("socket()");
 568         if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
 569                 perror_msg_and_die("connect(%s)", host);
 570         if ((fp = fdopen(fd, "r+")) == NULL)
 571                 perror_msg_and_die("fdopen()");
 572
 573         return fp;
 574 }
 575
 576
 577 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
 578 {
 579         char *s, *hdrval;
 580         int c;
 581
 582         *istrunc = 0;
 583
 584         /* retrieve header line */
 585         if (fgets(buf, bufsiz, fp) == NULL)
 586                 return NULL;
 587
 588         /* see if we are at the end of the headers */
 589         for (s = buf ; *s == '\r' ; ++s)
 590                 ;
 591         if (s[0] == '\n')
 592                 return NULL;
 593
 594         /* convert the header name to lower case */
 595         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
 596                 *s = tolower(*s);
 597
 598         /* verify we are at the end of the header name */
 599         if (*s != ':')
 600                 error_msg_and_die("bad header line: %s", buf);
 601
 602         /* locate the start of the header value */
 603         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
 604                 ;
 605         hdrval = s;
 606
 607         /* locate the end of header */
 608         while (*s != '\0' && *s != '\r' && *s != '\n')
 609                 ++s;
 610
 611         /* end of header found */
 612         if (*s != '\0') {
 613                 *s = '\0';
 614                 return hdrval;
 615         }
 616
 617         /* Rats!  The buffer isn't big enough to hold the entire header value. */
 618         while (c = getc(fp), c != EOF && c != '\n')
 619                 ;
 620         *istrunc = 1;
 621         return hdrval;
 622 }
 623
 624 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
 625 {
 626         char *p;
 627
 628         if (s1) {
 629                 if (!s2) s2="";
 630                 fprintf(fp, "%s%s\n", s1, s2);
 631                 fflush(fp);
 632         }
 633
 634         do {
 635                 p = fgets(buf, 510, fp);
 636                 if (!p)
 637                         perror_msg_and_die("fgets()");
 638         } while (! isdigit(buf[0]) || buf[3] != ' ');
 639
 640         return atoi(buf);
 641 }
 642
 643 #ifdef BB_FEATURE_WGET_STATUSBAR
 644 /* Stuff below is from BSD rcp util.c, as added to openshh.
 645  * Original copyright notice is retained at the end of this file.
 646  *
 647  */
 648
 649
 650 static int
 651 getttywidth(void)
 652 {
 653         struct winsize winsize;
 654
 655         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
 656                 return (winsize.ws_col ? winsize.ws_col : 80);
 657         else
 658                 return (80);
 659 }
 660
 661 static void
 662 updateprogressmeter(int ignore)
 663 {
 664         int save_errno = errno;
 665
 666         progressmeter(0);
 667         errno = save_errno;
 668 }
 669
 670 static void
 671 alarmtimer(int wait)
 672 {
 673         struct itimerval itv;
 674
 675         itv.it_value.tv_sec = wait;
 676         itv.it_value.tv_usec = 0;
 677         itv.it_interval = itv.it_value;
 678         setitimer(ITIMER_REAL, &itv, NULL);
 679 }
 680
 681
 682 static void
 683 progressmeter(int flag)
 684 {
 685         static const char prefixes[] = " KMGTP";
 686         static struct timeval lastupdate;
 687         static off_t lastsize, totalsize;
 688         struct timeval now, td, wait;
 689         off_t cursize, abbrevsize;
 690         double elapsed;
 691         int ratio, barlength, i, remaining;
 692         char buf[256];
 693
 694         if (flag == -1) {
 695                 (void) gettimeofday(&start, (struct timezone *) 0);
 696                 lastupdate = start;
 697                 lastsize = 0;
 698                 totalsize = filesize; /* as filesize changes.. */
 699         }
 700
 701         (void) gettimeofday(&now, (struct timezone *) 0);
 702         cursize = statbytes;
 703         if (totalsize != 0 && !chunked) {
 704                 ratio = 100.0 * cursize / totalsize;
 705                 ratio = MAX(ratio, 0);
 706                 ratio = MIN(ratio, 100);
 707         } else
 708                 ratio = 100;
 709
 710         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
 711
 712         barlength = getttywidth() - 51;
 713         if (barlength > 0) {
 714                 i = barlength * ratio / 100;
 715                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 716                          "|%.*s%*s|", i,
 717                          "*****************************************************************************"
 718                          "*****************************************************************************",
 719                          barlength - i, "");
 720         }
 721         i = 0;
 722         abbrevsize = cursize;
 723         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
 724                 i++;
 725                 abbrevsize >>= 10;
 726         }
 727         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
 728              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
 729                  'B');
 730
 731         timersub(&now, &lastupdate, &wait);
 732         if (cursize > lastsize) {
 733                 lastupdate = now;
 734                 lastsize = cursize;
 735                 if (wait.tv_sec >= STALLTIME) {
 736                         start.tv_sec += wait.tv_sec;
 737                         start.tv_usec += wait.tv_usec;
 738                 }
 739                 wait.tv_sec = 0;
 740         }
 741         timersub(&now, &start, &td);
 742         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
 743
 744         if (wait.tv_sec >= STALLTIME) {
 745                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 746                          " - stalled -");
 747         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
 748                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 749                          "   --:-- ETA");
 750         } else {
 751                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
 752                 i = remaining / 3600;
 753                 if (i)
 754                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 755                                  "%2d:", i);
 756                 else
 757                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 758                                  "   ");
 759                 i = remaining % 3600;
 760                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 761                          "%02d:%02d ETA", i / 60, i % 60);
 762         }
 763         write(fileno(stderr), buf, strlen(buf));
 764
 765         if (flag == -1) {
 766                 struct sigaction sa;
 767                 sa.sa_handler = updateprogressmeter;
 768                 sigemptyset(&sa.sa_mask);
 769                 sa.sa_flags = SA_RESTART;
 770                 sigaction(SIGALRM, &sa, NULL);
 771                 alarmtimer(1);
 772         } else if (flag == 1) {
 773                 alarmtimer(0);
 774                 statbytes = 0;
 775                 putc('\n', stderr);
 776         }
 777 }
 778 #endif
 779
 780 /* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
 781  * much of which was blatently stolen from openssh.  */
 782
 783 /*-
 784  * Copyright (c) 1992, 1993
 785  *      The Regents of the University of California.  All rights reserved.
 786  *
 787  * Redistribution and use in source and binary forms, with or without
 788  * modification, are permitted provided that the following conditions
 789  * are met:
 790  * 1. Redistributions of source code must retain the above copyright
 791  *    notice, this list of conditions and the following disclaimer.
 792  * 2. Redistributions in binary form must reproduce the above copyright
 793  *    notice, this list of conditions and the following disclaimer in the
 794  *    documentation and/or other materials provided with the distribution.
 795  *
 796  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 797  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 798  *
 799  * 4. Neither the name of the University nor the names of its contributors
 800  *    may be used to endorse or promote products derived from this software
 801  *    without specific prior written permission.
 802  *
 803  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 804  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 805  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 806  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 807  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 808  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 809  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 810  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 811  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 812  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 813  * SUCH DAMAGE.
 814  *
 815  *      $Id: wget.c,v 1.41 2001/05/16 15:40:48 kraai Exp $
 816  */
 817
 818
 819
 820 /*
 821 Local Variables:
 822 c-file-style: "linux"
 823 c-basic-offset: 4
 824 tab-width: 4
 825 End:
 826 */
 827
 828
 829