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
  60 /* Globals (can be accessed from signal handlers */
  61 static off_t filesize = 0;              /* content-length of the file */
  62 static int chunked = 0;                 /* chunked transfer encoding */
  63 #ifdef BB_FEATURE_WGET_STATUSBAR
  64 static void progressmeter(int flag);
  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 *dir_prefix=NULL;
 164         char *s, buf[512];
 165         struct stat sbuf;
 166         char extra_headers[1024];
 167         char *extra_headers_ptr = extra_headers;
 168         int extra_headers_left = sizeof(extra_headers);
 169         int which_long_opt = 0, option_index = -1;
 170         struct host_info server, target;
 171
 172         FILE *sfp = NULL;                       /* socket to web/ftp server                     */
 173         FILE *dfp = NULL;                       /* socket to ftp server (data)          */
 174         char *fname_out = NULL;         /* where to direct output (-O)          */
 175         int do_continue = 0;            /* continue a prev transfer (-c)        */
 176         long beg_range = 0L;            /*   range at which continue begins     */
 177         int got_clen = 0;                       /* got content-length: from server      */
 178         FILE *output;                           /* socket to web server                         */
 179         int quiet_flag = FALSE;         /* Be verry, verry quiet...                     */
 180
 181 #define LONG_HEADER     1
 182         struct option long_options[] = {
 183                 { "continue",           0, NULL, 'c' },
 184                 { "quiet",              0, NULL, 'q' },
 185                 { "output-document",    1, NULL, 'O' },
 186                 { "header",             1, &which_long_opt, LONG_HEADER },
 187                 { 0,                    0, 0, 0 }
 188         };
 189         /*
 190          * Crack command line.
 191          */
 192         while ((n = getopt_long(argc, argv, "cqO:P:", long_options, &option_index)) != EOF) {
 193                 switch (n) {
 194                 case 'c':
 195                         ++do_continue;
 196                         break;
 197                 case 'P':
 198                         dir_prefix = optarg;
 199                         break;
 200                 case 'q':
 201                         quiet_flag = TRUE;
 202                         break;
 203                 case 'O':
 204                         /* can't set fname_out to NULL if outputting to stdout, because
 205                          * this gets interpreted as the auto-gen output filename
 206                          * case below  - tausq@debian.org
 207                          */
 208                         fname_out = optarg;
 209                         break;
 210                 case 0:
 211                         switch (which_long_opt) {
 212                                 case LONG_HEADER: {
 213                                         int arglen = strlen(optarg);
 214                                         if(extra_headers_left - arglen - 2 <= 0)
 215                                                 error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
 216                                         strcpy(extra_headers_ptr, optarg);
 217                                         extra_headers_ptr += arglen;
 218                                         extra_headers_left -= ( arglen + 2 );
 219                                         *extra_headers_ptr++ = '\r';
 220                                         *extra_headers_ptr++ = '\n';
 221                                         *(extra_headers_ptr + 1) = 0;
 222                                         break;
 223                                 }
 224                         }
 225                         break;
 226                 default:
 227                         show_usage();
 228                 }
 229         }
 230
 231         if (argc - optind != 1)
 232                         show_usage();
 233
 234         parse_url(argv[optind], &target);
 235         server.host = target.host;
 236         server.port = target.port;
 237
 238         /*
 239          * Use the proxy if necessary.
 240          */
 241         proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
 242         if (proxy)
 243                 parse_url(xstrdup(proxy), &server);
 244
 245         /* Guess an output filename */
 246         if (!fname_out) {
 247                 fname_out =
 248 #ifdef BB_FEATURE_WGET_STATUSBAR
 249                         curfile =
 250 #endif
 251                         get_last_path_component(target.path);
 252                 if (fname_out==NULL || strlen(fname_out)<1) {
 253                         fname_out =
 254 #ifdef BB_FEATURE_WGET_STATUSBAR
 255                                 curfile =
 256 #endif
 257                                 "index.html";
 258                 }
 259                 if (dir_prefix != NULL)
 260                         fname_out = concat_path_file(dir_prefix, fname_out);
 261 #ifdef BB_FEATURE_WGET_STATUSBAR
 262         } else {
 263                 curfile = get_last_path_component(fname_out);
 264 #endif
 265         }
 266         if (do_continue && !fname_out)
 267                 error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
 268
 269
 270         /*
 271          * Open the output file stream.
 272          */
 273         if (strcmp(fname_out, "-") == 0) {
 274                 output = stdout;
 275                 quiet_flag = TRUE;
 276         } else {
 277                 output = xfopen(fname_out, (do_continue ? "a" : "w"));
 278         }
 279
 280         /*
 281          * Determine where to start transfer.
 282          */
 283         if (do_continue) {
 284                 if (fstat(fileno(output), &sbuf) < 0)
 285                         perror_msg_and_die("fstat()");
 286                 if (sbuf.st_size > 0)
 287                         beg_range = sbuf.st_size;
 288                 else
 289                         do_continue = 0;
 290         }
 291
 292         if (proxy || !target.is_ftp) {
 293                 /*
 294                  *  HTTP session
 295                  */
 296                 do {
 297                         if (! --try)
 298                                 close_delete_and_die("too many redirections");
 299
 300                         /*
 301                          * Open socket to http server
 302                          */
 303                         if (sfp) fclose(sfp);
 304                         sfp = open_socket(server.host, server.port);
 305
 306                         /*
 307                          * Send HTTP request.
 308                          */
 309                         if (proxy) {
 310                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
 311                                         target.is_ftp ? "f" : "ht", target.host,
 312                                         target.port, target.path);
 313                         } else {
 314                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
 315                         }
 316
 317                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
 318
 319 #ifdef BB_FEATURE_WGET_AUTHENTICATION
 320                         if (target.user) {
 321                                 fprintf(sfp, "Authorization: Basic %s\r\n",
 322                                         base64enc(target.user, buf, sizeof(buf)));
 323                         }
 324                         if (proxy && server.user) {
 325                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
 326                                         base64enc(server.user, buf, sizeof(buf)));
 327                         }
 328 #endif
 329
 330                         if (do_continue)
 331                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
 332                         if(extra_headers_left < sizeof(extra_headers))
 333                                 fputs(extra_headers,sfp);
 334                         fprintf(sfp,"Connection: close\r\n\r\n");
 335
 336                         /*
 337                         * Retrieve HTTP response line and check for "200" status code.
 338                         */
 339 read_response:          if (fgets(buf, sizeof(buf), sfp) == NULL)
 340                                 close_delete_and_die("no response from server");
 341
 342                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
 343                         ;
 344                         for ( ; isspace(*s) ; ++s)
 345                         ;
 346                         switch (status = atoi(s)) {
 347                                 case 0:
 348                                 case 100:
 349                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
 350                                         goto read_response;
 351                                 case 200:
 352                                         if (do_continue && output != stdout)
 353                                                 output = freopen(fname_out, "w", output);
 354                                         do_continue = 0;
 355                                         break;
 356                                 case 300:       /* redirection */
 357                                 case 301:
 358                                 case 302:
 359                                 case 303:
 360                                         break;
 361                                 case 206:
 362                                         if (do_continue)
 363                                                 break;
 364                                         /*FALLTHRU*/
 365                                 default:
 366                                         chomp(buf);
 367                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
 368                         }
 369
 370                         /*
 371                          * Retrieve HTTP headers.
 372                          */
 373                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
 374                                 if (strcasecmp(buf, "content-length") == 0) {
 375                                         filesize = atol(s);
 376                                         got_clen = 1;
 377                                         continue;
 378                                 }
 379                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
 380                                         if (strcasecmp(s, "chunked") == 0) {
 381                                                 chunked = got_clen = 1;
 382                                         } else {
 383                                         close_delete_and_die("server wants to do %s transfer encoding", s);
 384                                         }
 385                                 }
 386                                 if (strcasecmp(buf, "location") == 0) {
 387                                         if (s[0] == '/')
 388                                                 target.path = xstrdup(s+1);
 389                                         else {
 390                                                 parse_url(xstrdup(s), &target);
 391                                                 if (!proxy) {
 392                                                         server.host = target.host;
 393                                                         server.port = target.port;
 394                                                 }
 395                                         }
 396                                 }
 397                         }
 398                 } while(status >= 300);
 399
 400                 dfp = sfp;
 401         }
 402         else
 403         {
 404                 /*
 405                  *  FTP session
 406                  */
 407                 if (! target.user)
 408                         target.user = xstrdup("anonymous:busybox@");
 409
 410                 sfp = open_socket(server.host, server.port);
 411                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
 412                         close_delete_and_die("%s", buf+4);
 413
 414                 /*
 415                  * Splitting username:password pair,
 416                  * trying to log in
 417                  */
 418                 s = strchr(target.user, ':');
 419                 if (s)
 420                         *(s++) = '\0';
 421                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
 422                         case 230:
 423                                 break;
 424                         case 331:
 425                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
 426                                         break;
 427                                 /* FALLTHRU (failed login) */
 428                         default:
 429                                 close_delete_and_die("ftp login: %s", buf+4);
 430                 }
 431
 432                 ftpcmd("CDUP", NULL, sfp, buf);
 433                 ftpcmd("TYPE I", NULL, sfp, buf);
 434
 435                 /*
 436                  * Querying file size
 437                  */
 438                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
 439                         filesize = atol(buf+4);
 440                         got_clen = 1;
 441                 }
 442
 443                 /*
 444                  * Entering passive mode
 445                  */
 446                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
 447                         close_delete_and_die("PASV: %s", buf+4);
 448                 s = strrchr(buf, ',');
 449                 *s = 0;
 450                 port = atoi(s+1);
 451                 s = strrchr(buf, ',');
 452                 port += atoi(s+1) * 256;
 453                 dfp = open_socket(server.host, port);
 454
 455                 if (do_continue) {
 456                         sprintf(buf, "REST %ld", beg_range);
 457                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
 458                                 if (output != stdout)
 459                                         output = freopen(fname_out, "w", output);
 460                                 do_continue = 0;
 461                         } else
 462                                 filesize -= beg_range;
 463                 }
 464
 465                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
 466                         close_delete_and_die("RETR: %s", buf+4);
 467
 468         }
 469
 470
 471         /*
 472          * Retrieve file
 473          */
 474         if (chunked) {
 475                 fgets(buf, sizeof(buf), dfp);
 476                 filesize = strtol(buf, (char **) NULL, 16);
 477         }
 478 #ifdef BB_FEATURE_WGET_STATUSBAR
 479         if (quiet_flag==FALSE)
 480                 progressmeter(-1);
 481 #endif
 482         do {
 483                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
 484                 safe_fwrite(buf, 1, n, output);
 485 #ifdef BB_FEATURE_WGET_STATUSBAR
 486                 statbytes+=n;
 487 #endif
 488                 if (got_clen)
 489                         filesize -= n;
 490         }
 491
 492                 if (chunked) {
 493                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
 494                         safe_fgets(buf, sizeof(buf), dfp);
 495                         filesize = strtol(buf, (char **) NULL, 16);
 496                         if (filesize==0) chunked = 0; /* all done! */
 497                 }
 498
 499         if (n == 0 && ferror(dfp))
 500                 perror_msg_and_die("network read error");
 501         } while (chunked);
 502 #ifdef BB_FEATURE_WGET_STATUSBAR
 503         if (quiet_flag==FALSE)
 504                 progressmeter(1);
 505 #endif
 506         if (!proxy && target.is_ftp) {
 507                 fclose(dfp);
 508                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
 509                         error_msg_and_die("ftp error: %s", buf+4);
 510                 ftpcmd("QUIT", NULL, sfp, buf);
 511         }
 512         exit(EXIT_SUCCESS);
 513 }
 514
 515
 516 void parse_url(char *url, struct host_info *h)
 517 {
 518         char *cp, *sp, *up;
 519
 520         if (strncmp(url, "http://", 7) == 0) {
 521                 h->port = 80;
 522                 h->host = url + 7;
 523                 h->is_ftp = 0;
 524         } else if (strncmp(url, "ftp://", 6) == 0) {
 525                 h->port = 21;
 526                 h->host = url + 6;
 527                 h->is_ftp = 1;
 528         } else
 529                 error_msg_and_die("not an http or ftp url: %s", url);
 530
 531         sp = strchr(h->host, '/');
 532         if (sp != NULL) {
 533                 *sp++ = '\0';
 534                 h->path = sp;
 535         } else
 536                 h->path = "";
 537
 538         up = strrchr(h->host, '@');
 539         if (up != NULL) {
 540                 h->user = h->host;
 541                 *up++ = '\0';
 542                 h->host = up;
 543         } else
 544                 h->user = NULL;
 545
 546         cp = strchr(h->host, ':');
 547         if (cp != NULL) {
 548                 *cp++ = '\0';
 549                 h->port = atoi(cp);
 550         }
 551
 552 }
 553
 554
 555 FILE *open_socket(char *host, int port)
 556 {
 557         struct sockaddr_in s_in;
 558         struct hostent *hp;
 559         int fd;
 560         FILE *fp;
 561
 562         memset(&s_in, 0, sizeof(s_in));
 563         s_in.sin_family = AF_INET;
 564         hp = xgethostbyname(host);
 565         memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
 566         s_in.sin_port = htons(port);
 567
 568         /*
 569          * Get the server onto a stdio stream.
 570          */
 571         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 572                 perror_msg_and_die("socket()");
 573         if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
 574                 perror_msg_and_die("connect(%s)", host);
 575         if ((fp = fdopen(fd, "r+")) == NULL)
 576                 perror_msg_and_die("fdopen()");
 577
 578         return fp;
 579 }
 580
 581
 582 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
 583 {
 584         char *s, *hdrval;
 585         int c;
 586
 587         *istrunc = 0;
 588
 589         /* retrieve header line */
 590         if (fgets(buf, bufsiz, fp) == NULL)
 591                 return NULL;
 592
 593         /* see if we are at the end of the headers */
 594         for (s = buf ; *s == '\r' ; ++s)
 595                 ;
 596         if (s[0] == '\n')
 597                 return NULL;
 598
 599         /* convert the header name to lower case */
 600         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
 601                 *s = tolower(*s);
 602
 603         /* verify we are at the end of the header name */
 604         if (*s != ':')
 605                 error_msg_and_die("bad header line: %s", buf);
 606
 607         /* locate the start of the header value */
 608         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
 609                 ;
 610         hdrval = s;
 611
 612         /* locate the end of header */
 613         while (*s != '\0' && *s != '\r' && *s != '\n')
 614                 ++s;
 615
 616         /* end of header found */
 617         if (*s != '\0') {
 618                 *s = '\0';
 619                 return hdrval;
 620         }
 621
 622         /* Rats!  The buffer isn't big enough to hold the entire header value. */
 623         while (c = getc(fp), c != EOF && c != '\n')
 624                 ;
 625         *istrunc = 1;
 626         return hdrval;
 627 }
 628
 629 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
 630 {
 631         char *p;
 632
 633         if (s1) {
 634                 if (!s2) s2="";
 635                 fprintf(fp, "%s%s\n", s1, s2);
 636                 fflush(fp);
 637         }
 638
 639         do {
 640                 p = fgets(buf, 510, fp);
 641                 if (!p)
 642                         perror_msg_and_die("fgets()");
 643         } while (! isdigit(buf[0]) || buf[3] != ' ');
 644
 645         return atoi(buf);
 646 }
 647
 648 #ifdef BB_FEATURE_WGET_STATUSBAR
 649 /* Stuff below is from BSD rcp util.c, as added to openshh.
 650  * Original copyright notice is retained at the end of this file.
 651  *
 652  */
 653
 654
 655 static int
 656 getttywidth(void)
 657 {
 658         struct winsize winsize;
 659
 660         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
 661                 return (winsize.ws_col ? winsize.ws_col : 80);
 662         else
 663                 return (80);
 664 }
 665
 666 static void
 667 updateprogressmeter(int ignore)
 668 {
 669         int save_errno = errno;
 670
 671         progressmeter(0);
 672         errno = save_errno;
 673 }
 674
 675 static void
 676 alarmtimer(int wait)
 677 {
 678         struct itimerval itv;
 679
 680         itv.it_value.tv_sec = wait;
 681         itv.it_value.tv_usec = 0;
 682         itv.it_interval = itv.it_value;
 683         setitimer(ITIMER_REAL, &itv, NULL);
 684 }
 685
 686
 687 static void
 688 progressmeter(int flag)
 689 {
 690         static const char prefixes[] = " KMGTP";
 691         static struct timeval lastupdate;
 692         static off_t lastsize, totalsize;
 693         struct timeval now, td, wait;
 694         off_t cursize, abbrevsize;
 695         double elapsed;
 696         int ratio, barlength, i, remaining;
 697         char buf[256];
 698
 699         if (flag == -1) {
 700                 (void) gettimeofday(&start, (struct timezone *) 0);
 701                 lastupdate = start;
 702                 lastsize = 0;
 703                 totalsize = filesize; /* as filesize changes.. */
 704         }
 705
 706         (void) gettimeofday(&now, (struct timezone *) 0);
 707         cursize = statbytes;
 708         if (totalsize != 0 && !chunked) {
 709                 ratio = 100.0 * cursize / totalsize;
 710                 ratio = MAX(ratio, 0);
 711                 ratio = MIN(ratio, 100);
 712         } else
 713                 ratio = 100;
 714
 715         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
 716
 717         barlength = getttywidth() - 51;
 718         if (barlength > 0) {
 719                 i = barlength * ratio / 100;
 720                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 721                          "|%.*s%*s|", i,
 722                          "*****************************************************************************"
 723                          "*****************************************************************************",
 724                          barlength - i, "");
 725         }
 726         i = 0;
 727         abbrevsize = cursize;
 728         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
 729                 i++;
 730                 abbrevsize >>= 10;
 731         }
 732         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
 733              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
 734                  'B');
 735
 736         timersub(&now, &lastupdate, &wait);
 737         if (cursize > lastsize) {
 738                 lastupdate = now;
 739                 lastsize = cursize;
 740                 if (wait.tv_sec >= STALLTIME) {
 741                         start.tv_sec += wait.tv_sec;
 742                         start.tv_usec += wait.tv_usec;
 743                 }
 744                 wait.tv_sec = 0;
 745         }
 746         timersub(&now, &start, &td);
 747         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
 748
 749         if (wait.tv_sec >= STALLTIME) {
 750                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 751                          " - stalled -");
 752         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
 753                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 754                          "   --:-- ETA");
 755         } else {
 756                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
 757                 i = remaining / 3600;
 758                 if (i)
 759                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 760                                  "%2d:", i);
 761                 else
 762                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 763                                  "   ");
 764                 i = remaining % 3600;
 765                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 766                          "%02d:%02d ETA", i / 60, i % 60);
 767         }
 768         write(fileno(stderr), buf, strlen(buf));
 769
 770         if (flag == -1) {
 771                 struct sigaction sa;
 772                 sa.sa_handler = updateprogressmeter;
 773                 sigemptyset(&sa.sa_mask);
 774                 sa.sa_flags = SA_RESTART;
 775                 sigaction(SIGALRM, &sa, NULL);
 776                 alarmtimer(1);
 777         } else if (flag == 1) {
 778                 alarmtimer(0);
 779                 statbytes = 0;
 780                 putc('\n', stderr);
 781         }
 782 }
 783 #endif
 784
 785 /* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
 786  * much of which was blatently stolen from openssh.  */
 787
 788 /*-
 789  * Copyright (c) 1992, 1993
 790  *      The Regents of the University of California.  All rights reserved.
 791  *
 792  * Redistribution and use in source and binary forms, with or without
 793  * modification, are permitted provided that the following conditions
 794  * are met:
 795  * 1. Redistributions of source code must retain the above copyright
 796  *    notice, this list of conditions and the following disclaimer.
 797  * 2. Redistributions in binary form must reproduce the above copyright
 798  *    notice, this list of conditions and the following disclaimer in the
 799  *    documentation and/or other materials provided with the distribution.
 800  *
 801  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 802  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 803  *
 804  * 4. Neither the name of the University nor the names of its contributors
 805  *    may be used to endorse or promote products derived from this software
 806  *    without specific prior written permission.
 807  *
 808  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 809  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 810  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 811  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 812  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 813  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 814  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 815  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 816  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 817  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 818  * SUCH DAMAGE.
 819  *
 820  *      $Id: wget.c,v 1.45 2001/07/19 22:28:01 andersen Exp $
 821  */
 822
 823
 824
 825 /*
 826 Local Variables:
 827 c-file-style: "linux"
 828 c-basic-offset: 4
 829 tab-width: 4
 830 End:
 831 */
 832
 833
 834