networking/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 CONFIG_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         bb_error_msg_and_die(s); }
 127
 128
 129 #ifdef CONFIG_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                                         bb_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 = 0;
 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         int noproxy = 0;            /* Use proxies if env vars are set  */
 181
 182 #define LONG_HEADER    1
 183 #define LONG_PASSIVE   2
 184
 185         struct option long_options[] = {
 186                 { "continue",        0, NULL, 'c' },
 187                 { "quiet",           0, NULL, 'q' },
 188                 { "output-document", 1, NULL, 'O' },
 189                 { "header",              1, &which_long_opt, LONG_HEADER },
 190                 { "proxy",           1, NULL, 'Y' },
 191                 { "passive-ftp",     0, &which_long_opt, LONG_PASSIVE },
 192                 { 0,                 0, 0, 0 }
 193         };
 194         /*
 195          * Crack command line.
 196          */
 197         while ((n = getopt_long(argc, argv, "cqO:P:Y:", long_options, &option_index)) != EOF) {
 198                 switch (n) {
 199                 case 'c':
 200                         ++do_continue;
 201                         break;
 202                 case 'P':
 203                         dir_prefix = optarg;
 204                         break;
 205                 case 'q':
 206                         quiet_flag = TRUE;
 207                         break;
 208                 case 'O':
 209                         /* can't set fname_out to NULL if outputting to stdout, because
 210                          * this gets interpreted as the auto-gen output filename
 211                          * case below  - tausq@debian.org
 212                          */
 213                         fname_out = optarg;
 214                         break;
 215                 case 'Y':
 216                         if (strcmp(optarg, "off") == 0)
 217                                 noproxy=1;
 218                         break;
 219                 case 0:
 220                         switch (which_long_opt) {
 221                                 case LONG_HEADER: {
 222                                         int arglen = strlen(optarg);
 223                                         if(extra_headers_left - arglen - 2 <= 0)
 224                                                 bb_error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
 225                                         strcpy(extra_headers_ptr, optarg);
 226                                         extra_headers_ptr += arglen;
 227                                         extra_headers_left -= ( arglen + 2 );
 228                                         *extra_headers_ptr++ = '\r';
 229                                         *extra_headers_ptr++ = '\n';
 230                                         *(extra_headers_ptr + 1) = 0;
 231                                         break;
 232                                 }
 233                                 case LONG_PASSIVE:
 234                                         // ignore -- we always use passive mode
 235                                         break;
 236                         }
 237                         break;
 238                 default:
 239                         bb_show_usage();
 240                 }
 241         }
 242
 243         if (argc - optind != 1)
 244                         bb_show_usage();
 245
 246         parse_url(argv[optind], &target);
 247         server.host = target.host;
 248         server.port = target.port;
 249
 250         /*
 251          * Use the proxy if necessary.
 252          */
 253         if (!noproxy) {
 254                 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
 255                 if (proxy)
 256                         parse_url(bb_xstrdup(proxy), &server);
 257         }
 258
 259         /* Guess an output filename */
 260         if (!fname_out) {
 261                 fname_out =
 262 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 263                         curfile =
 264 #endif
 265                         bb_get_last_path_component(target.path);
 266                 if (fname_out==NULL || strlen(fname_out)<1) {
 267                         fname_out =
 268 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 269                                 curfile =
 270 #endif
 271                                 "index.html";
 272                 }
 273                 if (dir_prefix != NULL)
 274                         fname_out = concat_path_file(dir_prefix, fname_out);
 275 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 276         } else {
 277                 curfile = bb_get_last_path_component(fname_out);
 278 #endif
 279         }
 280         if (do_continue && !fname_out)
 281                 bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
 282
 283
 284         /*
 285          * Open the output file stream.
 286          */
 287         if (strcmp(fname_out, "-") == 0) {
 288                 output = stdout;
 289                 quiet_flag = TRUE;
 290         } else {
 291                 output = bb_xfopen(fname_out, (do_continue ? "a" : "w"));
 292         }
 293
 294         /*
 295          * Determine where to start transfer.
 296          */
 297         if (do_continue) {
 298                 if (fstat(fileno(output), &sbuf) < 0)
 299                         bb_perror_msg_and_die("fstat()");
 300                 if (sbuf.st_size > 0)
 301                         beg_range = sbuf.st_size;
 302                 else
 303                         do_continue = 0;
 304         }
 305
 306         if (proxy || !target.is_ftp) {
 307                 /*
 308                  *  HTTP session
 309                  */
 310                 do {
 311                         if (! --try)
 312                                 close_delete_and_die("too many redirections");
 313
 314                         /*
 315                          * Open socket to http server
 316                          */
 317                         if (sfp) fclose(sfp);
 318                         sfp = open_socket(server.host, server.port);
 319
 320                         /*
 321                          * Send HTTP request.
 322                          */
 323                         if (proxy) {
 324                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
 325                                         target.is_ftp ? "f" : "ht", target.host,
 326                                         target.port, target.path);
 327                         } else {
 328                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
 329                         }
 330
 331                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
 332
 333 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
 334                         if (target.user) {
 335                                 fprintf(sfp, "Authorization: Basic %s\r\n",
 336                                         base64enc(target.user, buf, sizeof(buf)));
 337                         }
 338                         if (proxy && server.user) {
 339                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
 340                                         base64enc(server.user, buf, sizeof(buf)));
 341                         }
 342 #endif
 343
 344                         if (do_continue)
 345                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
 346                         if(extra_headers_left < sizeof(extra_headers))
 347                                 fputs(extra_headers,sfp);
 348                         fprintf(sfp,"Connection: close\r\n\r\n");
 349
 350                         /*
 351                         * Retrieve HTTP response line and check for "200" status code.
 352                         */
 353 read_response:          if (fgets(buf, sizeof(buf), sfp) == NULL)
 354                                 close_delete_and_die("no response from server");
 355
 356                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
 357                         ;
 358                         for ( ; isspace(*s) ; ++s)
 359                         ;
 360                         switch (status = atoi(s)) {
 361                                 case 0:
 362                                 case 100:
 363                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
 364                                         goto read_response;
 365                                 case 200:
 366                                         if (do_continue && output != stdout)
 367                                                 output = freopen(fname_out, "w", output);
 368                                         do_continue = 0;
 369                                         break;
 370                                 case 300:       /* redirection */
 371                                 case 301:
 372                                 case 302:
 373                                 case 303:
 374                                         break;
 375                                 case 206:
 376                                         if (do_continue)
 377                                                 break;
 378                                         /*FALLTHRU*/
 379                                 default:
 380                                         chomp(buf);
 381                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
 382                         }
 383
 384                         /*
 385                          * Retrieve HTTP headers.
 386                          */
 387                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
 388                                 if (strcasecmp(buf, "content-length") == 0) {
 389                                         filesize = atol(s);
 390                                         got_clen = 1;
 391                                         continue;
 392                                 }
 393                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
 394                                         if (strcasecmp(s, "chunked") == 0) {
 395                                                 chunked = got_clen = 1;
 396                                         } else {
 397                                         close_delete_and_die("server wants to do %s transfer encoding", s);
 398                                         }
 399                                 }
 400                                 if (strcasecmp(buf, "location") == 0) {
 401                                         if (s[0] == '/')
 402                                                 target.path = bb_xstrdup(s+1);
 403                                         else {
 404                                                 parse_url(bb_xstrdup(s), &target);
 405                                                 if (!proxy) {
 406                                                         server.host = target.host;
 407                                                         server.port = target.port;
 408                                                 }
 409                                         }
 410                                 }
 411                         }
 412                 } while(status >= 300);
 413
 414                 dfp = sfp;
 415         }
 416         else
 417         {
 418                 /*
 419                  *  FTP session
 420                  */
 421                 if (! target.user)
 422                         target.user = bb_xstrdup("anonymous:busybox@");
 423
 424                 sfp = open_socket(server.host, server.port);
 425                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
 426                         close_delete_and_die("%s", buf+4);
 427
 428                 /*
 429                  * Splitting username:password pair,
 430                  * trying to log in
 431                  */
 432                 s = strchr(target.user, ':');
 433                 if (s)
 434                         *(s++) = '\0';
 435                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
 436                         case 230:
 437                                 break;
 438                         case 331:
 439                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
 440                                         break;
 441                                 /* FALLTHRU (failed login) */
 442                         default:
 443                                 close_delete_and_die("ftp login: %s", buf+4);
 444                 }
 445
 446                 ftpcmd("CDUP", NULL, sfp, buf);
 447                 ftpcmd("TYPE I", NULL, sfp, buf);
 448
 449                 /*
 450                  * Querying file size
 451                  */
 452                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
 453                         filesize = atol(buf+4);
 454                         got_clen = 1;
 455                 }
 456
 457                 /*
 458                  * Entering passive mode
 459                  */
 460                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
 461                         close_delete_and_die("PASV: %s", buf+4);
 462                 s = strrchr(buf, ',');
 463                 *s = 0;
 464                 port = atoi(s+1);
 465                 s = strrchr(buf, ',');
 466                 port += atoi(s+1) * 256;
 467                 dfp = open_socket(server.host, port);
 468
 469                 if (do_continue) {
 470                         sprintf(buf, "REST %ld", beg_range);
 471                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
 472                                 if (output != stdout)
 473                                         output = freopen(fname_out, "w", output);
 474                                 do_continue = 0;
 475                         } else
 476                                 filesize -= beg_range;
 477                 }
 478
 479                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
 480                         close_delete_and_die("RETR: %s", buf+4);
 481
 482         }
 483
 484
 485         /*
 486          * Retrieve file
 487          */
 488         if (chunked) {
 489                 fgets(buf, sizeof(buf), dfp);
 490                 filesize = strtol(buf, (char **) NULL, 16);
 491         }
 492 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 493         if (quiet_flag==FALSE)
 494                 progressmeter(-1);
 495 #endif
 496         do {
 497                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
 498                         if (safe_fwrite(buf, 1, n, output) != n)
 499                                 bb_perror_msg_and_die("write error");
 500 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 501                 statbytes+=n;
 502 #endif
 503                 if (got_clen)
 504                         filesize -= n;
 505         }
 506
 507                 if (chunked) {
 508                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
 509                         safe_fgets(buf, sizeof(buf), dfp);
 510                         filesize = strtol(buf, (char **) NULL, 16);
 511                         if (filesize==0) chunked = 0; /* all done! */
 512                 }
 513
 514         if (n == 0 && ferror(dfp))
 515                 bb_perror_msg_and_die("network read error");
 516         } while (chunked);
 517 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 518         if (quiet_flag==FALSE)
 519                 progressmeter(1);
 520 #endif
 521         if (!proxy && target.is_ftp) {
 522                 fclose(dfp);
 523                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
 524                         bb_error_msg_and_die("ftp error: %s", buf+4);
 525                 ftpcmd("QUIT", NULL, sfp, buf);
 526         }
 527         exit(EXIT_SUCCESS);
 528 }
 529
 530
 531 void parse_url(char *url, struct host_info *h)
 532 {
 533         char *cp, *sp, *up;
 534
 535         if (strncmp(url, "http://", 7) == 0) {
 536                 h->port = 80;
 537                 h->host = url + 7;
 538                 h->is_ftp = 0;
 539         } else if (strncmp(url, "ftp://", 6) == 0) {
 540                 h->port = 21;
 541                 h->host = url + 6;
 542                 h->is_ftp = 1;
 543         } else
 544                 bb_error_msg_and_die("not an http or ftp url: %s", url);
 545
 546         sp = strchr(h->host, '/');
 547         if (sp != NULL) {
 548                 *sp++ = '\0';
 549                 h->path = sp;
 550         } else
 551                 h->path = bb_xstrdup("");
 552
 553         up = strrchr(h->host, '@');
 554         if (up != NULL) {
 555                 h->user = h->host;
 556                 *up++ = '\0';
 557                 h->host = up;
 558         } else
 559                 h->user = NULL;
 560
 561         cp = strchr(h->host, ':');
 562         if (cp != NULL) {
 563                 *cp++ = '\0';
 564                 h->port = atoi(cp);
 565         }
 566
 567 }
 568
 569
 570 FILE *open_socket(char *host, int port)
 571 {
 572         int fd;
 573         FILE *fp;
 574         char port_str[10];
 575
 576         snprintf(port_str, sizeof(port_str), "%d", port);
 577         fd=xconnect(host, port_str);
 578
 579         /*
 580          * Get the server onto a stdio stream.
 581          */
 582         if ((fp = fdopen(fd, "r+")) == NULL)
 583                 bb_perror_msg_and_die("fdopen()");
 584
 585         return fp;
 586 }
 587
 588
 589 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
 590 {
 591         char *s, *hdrval;
 592         int c;
 593
 594         *istrunc = 0;
 595
 596         /* retrieve header line */
 597         if (fgets(buf, bufsiz, fp) == NULL)
 598                 return NULL;
 599
 600         /* see if we are at the end of the headers */
 601         for (s = buf ; *s == '\r' ; ++s)
 602                 ;
 603         if (s[0] == '\n')
 604                 return NULL;
 605
 606         /* convert the header name to lower case */
 607         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
 608                 *s = tolower(*s);
 609
 610         /* verify we are at the end of the header name */
 611         if (*s != ':')
 612                 bb_error_msg_and_die("bad header line: %s", buf);
 613
 614         /* locate the start of the header value */
 615         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
 616                 ;
 617         hdrval = s;
 618
 619         /* locate the end of header */
 620         while (*s != '\0' && *s != '\r' && *s != '\n')
 621                 ++s;
 622
 623         /* end of header found */
 624         if (*s != '\0') {
 625                 *s = '\0';
 626                 return hdrval;
 627         }
 628
 629         /* Rats!  The buffer isn't big enough to hold the entire header value. */
 630         while (c = getc(fp), c != EOF && c != '\n')
 631                 ;
 632         *istrunc = 1;
 633         return hdrval;
 634 }
 635
 636 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
 637 {
 638         char *p;
 639
 640         if (s1) {
 641                 if (!s2) s2="";
 642                 fprintf(fp, "%s%s\r\n", s1, s2);
 643                 fflush(fp);
 644         }
 645
 646         do {
 647                 p = fgets(buf, 510, fp);
 648                 if (!p)
 649                         bb_perror_msg_and_die("fgets()");
 650         } while (! isdigit(buf[0]) || buf[3] != ' ');
 651
 652         return atoi(buf);
 653 }
 654
 655 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 656 /* Stuff below is from BSD rcp util.c, as added to openshh.
 657  * Original copyright notice is retained at the end of this file.
 658  *
 659  */
 660
 661
 662 static int
 663 getttywidth(void)
 664 {
 665         struct winsize winsize;
 666
 667         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
 668                 return (winsize.ws_col ? winsize.ws_col : 80);
 669         else
 670                 return (80);
 671 }
 672
 673 static void
 674 updateprogressmeter(int ignore)
 675 {
 676         int save_errno = errno;
 677
 678         progressmeter(0);
 679         errno = save_errno;
 680 }
 681
 682 static void
 683 alarmtimer(int wait)
 684 {
 685         struct itimerval itv;
 686
 687         itv.it_value.tv_sec = wait;
 688         itv.it_value.tv_usec = 0;
 689         itv.it_interval = itv.it_value;
 690         setitimer(ITIMER_REAL, &itv, NULL);
 691 }
 692
 693
 694 static void
 695 progressmeter(int flag)
 696 {
 697         static const char prefixes[] = " KMGTP";
 698         static struct timeval lastupdate;
 699         static off_t lastsize, totalsize;
 700         struct timeval now, td, wait;
 701         off_t cursize, abbrevsize;
 702         double elapsed;
 703         int ratio, barlength, i, remaining;
 704         char buf[256];
 705
 706         if (flag == -1) {
 707                 (void) gettimeofday(&start, (struct timezone *) 0);
 708                 lastupdate = start;
 709                 lastsize = 0;
 710                 totalsize = filesize; /* as filesize changes.. */
 711         }
 712
 713         (void) gettimeofday(&now, (struct timezone *) 0);
 714         cursize = statbytes;
 715         if (totalsize != 0 && !chunked) {
 716                 ratio = 100.0 * cursize / totalsize;
 717                 ratio = MAX(ratio, 0);
 718                 ratio = MIN(ratio, 100);
 719         } else
 720                 ratio = 100;
 721
 722         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
 723
 724         barlength = getttywidth() - 51;
 725         if (barlength > 0) {
 726                 i = barlength * ratio / 100;
 727                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 728                          "|%.*s%*s|", i,
 729                          "*****************************************************************************"
 730                          "*****************************************************************************",
 731                          barlength - i, "");
 732         }
 733         i = 0;
 734         abbrevsize = cursize;
 735         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
 736                 i++;
 737                 abbrevsize >>= 10;
 738         }
 739         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
 740              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
 741                  'B');
 742
 743         timersub(&now, &lastupdate, &wait);
 744         if (cursize > lastsize) {
 745                 lastupdate = now;
 746                 lastsize = cursize;
 747                 if (wait.tv_sec >= STALLTIME) {
 748                         start.tv_sec += wait.tv_sec;
 749                         start.tv_usec += wait.tv_usec;
 750                 }
 751                 wait.tv_sec = 0;
 752         }
 753         timersub(&now, &start, &td);
 754         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
 755
 756         if (wait.tv_sec >= STALLTIME) {
 757                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 758                          " - stalled -");
 759         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
 760                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 761                          "   --:-- ETA");
 762         } else {
 763                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
 764                 i = remaining / 3600;
 765                 if (i)
 766                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 767                                  "%2d:", i);
 768                 else
 769                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 770                                  "   ");
 771                 i = remaining % 3600;
 772                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 773                          "%02d:%02d ETA", i / 60, i % 60);
 774         }
 775         write(fileno(stderr), buf, strlen(buf));
 776
 777         if (flag == -1) {
 778                 struct sigaction sa;
 779                 sa.sa_handler = updateprogressmeter;
 780                 sigemptyset(&sa.sa_mask);
 781                 sa.sa_flags = SA_RESTART;
 782                 sigaction(SIGALRM, &sa, NULL);
 783                 alarmtimer(1);
 784         } else if (flag == 1) {
 785                 alarmtimer(0);
 786                 statbytes = 0;
 787                 putc('\n', stderr);
 788         }
 789 }
 790 #endif
 791
 792 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
 793  * much of which was blatently stolen from openssh.  */
 794
 795 /*-
 796  * Copyright (c) 1992, 1993
 797  *      The Regents of the University of California.  All rights reserved.
 798  *
 799  * Redistribution and use in source and binary forms, with or without
 800  * modification, are permitted provided that the following conditions
 801  * are met:
 802  * 1. Redistributions of source code must retain the above copyright
 803  *    notice, this list of conditions and the following disclaimer.
 804  * 2. Redistributions in binary form must reproduce the above copyright
 805  *    notice, this list of conditions and the following disclaimer in the
 806  *    documentation and/or other materials provided with the distribution.
 807  *
 808  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 809  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 810  *
 811  * 4. Neither the name of the University nor the names of its contributors
 812  *    may be used to endorse or promote products derived from this software
 813  *    without specific prior written permission.
 814  *
 815  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 816  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 817  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 818  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 819  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 820  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 821  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 822  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 823  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 824  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 825  * SUCH DAMAGE.
 826  *
 827  *      $Id: wget.c,v 1.53 2003/03/19 09:12:39 mjn3 Exp $
 828  */
 829
 830
 831
 832 /*
 833 Local Variables:
 834 c-file-style: "linux"
 835 c-basic-offset: 4
 836 tab-width: 4
 837 End:
 838 */
 839
 840
 841