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         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                                         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         struct option long_options[] = {
 184                 { "continue",           0, NULL, 'c' },
 185                 { "quiet",              0, NULL, 'q' },
 186                 { "output-document",    1, NULL, 'O' },
 187                 { "header",             1, &which_long_opt, LONG_HEADER },
 188                 { "proxy",              1, NULL, 'Y' },
 189                 { 0,                    0, 0, 0 }
 190         };
 191         /*
 192          * Crack command line.
 193          */
 194         while ((n = getopt_long(argc, argv, "cqO:P:Y:", long_options, &option_index)) != EOF) {
 195                 switch (n) {
 196                 case 'c':
 197                         ++do_continue;
 198                         break;
 199                 case 'P':
 200                         dir_prefix = optarg;
 201                         break;
 202                 case 'q':
 203                         quiet_flag = TRUE;
 204                         break;
 205                 case 'O':
 206                         /* can't set fname_out to NULL if outputting to stdout, because
 207                          * this gets interpreted as the auto-gen output filename
 208                          * case below  - tausq@debian.org
 209                          */
 210                         fname_out = optarg;
 211                         break;
 212                 case 'Y':
 213                         if (strcmp(optarg, "off") == 0)
 214                                 noproxy=1;
 215                         break;
 216                 case 0:
 217                         switch (which_long_opt) {
 218                                 case LONG_HEADER: {
 219                                         int arglen = strlen(optarg);
 220                                         if(extra_headers_left - arglen - 2 <= 0)
 221                                                 error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
 222                                         strcpy(extra_headers_ptr, optarg);
 223                                         extra_headers_ptr += arglen;
 224                                         extra_headers_left -= ( arglen + 2 );
 225                                         *extra_headers_ptr++ = '\r';
 226                                         *extra_headers_ptr++ = '\n';
 227                                         *(extra_headers_ptr + 1) = 0;
 228                                         break;
 229                                 }
 230                         }
 231                         break;
 232                 default:
 233                         show_usage();
 234                 }
 235         }
 236
 237         if (argc - optind != 1)
 238                         show_usage();
 239
 240         parse_url(argv[optind], &target);
 241         server.host = target.host;
 242         server.port = target.port;
 243
 244         /*
 245          * Use the proxy if necessary.
 246          */
 247         if (!noproxy) {
 248                 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
 249                 if (proxy)
 250                         parse_url(xstrdup(proxy), &server);
 251         }
 252
 253         /* Guess an output filename */
 254         if (!fname_out) {
 255                 fname_out =
 256 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 257                         curfile =
 258 #endif
 259                         get_last_path_component(target.path);
 260                 if (fname_out==NULL || strlen(fname_out)<1) {
 261                         fname_out =
 262 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 263                                 curfile =
 264 #endif
 265                                 "index.html";
 266                 }
 267                 if (dir_prefix != NULL)
 268                         fname_out = concat_path_file(dir_prefix, fname_out);
 269 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 270         } else {
 271                 curfile = get_last_path_component(fname_out);
 272 #endif
 273         }
 274         if (do_continue && !fname_out)
 275                 error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
 276
 277
 278         /*
 279          * Open the output file stream.
 280          */
 281         if (strcmp(fname_out, "-") == 0) {
 282                 output = stdout;
 283                 quiet_flag = TRUE;
 284         } else {
 285                 output = xfopen(fname_out, (do_continue ? "a" : "w"));
 286         }
 287
 288         /*
 289          * Determine where to start transfer.
 290          */
 291         if (do_continue) {
 292                 if (fstat(fileno(output), &sbuf) < 0)
 293                         perror_msg_and_die("fstat()");
 294                 if (sbuf.st_size > 0)
 295                         beg_range = sbuf.st_size;
 296                 else
 297                         do_continue = 0;
 298         }
 299
 300         if (proxy || !target.is_ftp) {
 301                 /*
 302                  *  HTTP session
 303                  */
 304                 do {
 305                         if (! --try)
 306                                 close_delete_and_die("too many redirections");
 307
 308                         /*
 309                          * Open socket to http server
 310                          */
 311                         if (sfp) fclose(sfp);
 312                         sfp = open_socket(server.host, server.port);
 313
 314                         /*
 315                          * Send HTTP request.
 316                          */
 317                         if (proxy) {
 318                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
 319                                         target.is_ftp ? "f" : "ht", target.host,
 320                                         target.port, target.path);
 321                         } else {
 322                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
 323                         }
 324
 325                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
 326
 327 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
 328                         if (target.user) {
 329                                 fprintf(sfp, "Authorization: Basic %s\r\n",
 330                                         base64enc(target.user, buf, sizeof(buf)));
 331                         }
 332                         if (proxy && server.user) {
 333                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
 334                                         base64enc(server.user, buf, sizeof(buf)));
 335                         }
 336 #endif
 337
 338                         if (do_continue)
 339                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
 340                         if(extra_headers_left < sizeof(extra_headers))
 341                                 fputs(extra_headers,sfp);
 342                         fprintf(sfp,"Connection: close\r\n\r\n");
 343
 344                         /*
 345                         * Retrieve HTTP response line and check for "200" status code.
 346                         */
 347 read_response:          if (fgets(buf, sizeof(buf), sfp) == NULL)
 348                                 close_delete_and_die("no response from server");
 349
 350                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
 351                         ;
 352                         for ( ; isspace(*s) ; ++s)
 353                         ;
 354                         switch (status = atoi(s)) {
 355                                 case 0:
 356                                 case 100:
 357                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
 358                                         goto read_response;
 359                                 case 200:
 360                                         if (do_continue && output != stdout)
 361                                                 output = freopen(fname_out, "w", output);
 362                                         do_continue = 0;
 363                                         break;
 364                                 case 300:       /* redirection */
 365                                 case 301:
 366                                 case 302:
 367                                 case 303:
 368                                         break;
 369                                 case 206:
 370                                         if (do_continue)
 371                                                 break;
 372                                         /*FALLTHRU*/
 373                                 default:
 374                                         chomp(buf);
 375                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
 376                         }
 377
 378                         /*
 379                          * Retrieve HTTP headers.
 380                          */
 381                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
 382                                 if (strcasecmp(buf, "content-length") == 0) {
 383                                         filesize = atol(s);
 384                                         got_clen = 1;
 385                                         continue;
 386                                 }
 387                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
 388                                         if (strcasecmp(s, "chunked") == 0) {
 389                                                 chunked = got_clen = 1;
 390                                         } else {
 391                                         close_delete_and_die("server wants to do %s transfer encoding", s);
 392                                         }
 393                                 }
 394                                 if (strcasecmp(buf, "location") == 0) {
 395                                         if (s[0] == '/')
 396                                                 target.path = xstrdup(s+1);
 397                                         else {
 398                                                 parse_url(xstrdup(s), &target);
 399                                                 if (!proxy) {
 400                                                         server.host = target.host;
 401                                                         server.port = target.port;
 402                                                 }
 403                                         }
 404                                 }
 405                         }
 406                 } while(status >= 300);
 407
 408                 dfp = sfp;
 409         }
 410         else
 411         {
 412                 /*
 413                  *  FTP session
 414                  */
 415                 if (! target.user)
 416                         target.user = xstrdup("anonymous:busybox@");
 417
 418                 sfp = open_socket(server.host, server.port);
 419                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
 420                         close_delete_and_die("%s", buf+4);
 421
 422                 /*
 423                  * Splitting username:password pair,
 424                  * trying to log in
 425                  */
 426                 s = strchr(target.user, ':');
 427                 if (s)
 428                         *(s++) = '\0';
 429                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
 430                         case 230:
 431                                 break;
 432                         case 331:
 433                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
 434                                         break;
 435                                 /* FALLTHRU (failed login) */
 436                         default:
 437                                 close_delete_and_die("ftp login: %s", buf+4);
 438                 }
 439
 440                 ftpcmd("CDUP", NULL, sfp, buf);
 441                 ftpcmd("TYPE I", NULL, sfp, buf);
 442
 443                 /*
 444                  * Querying file size
 445                  */
 446                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
 447                         filesize = atol(buf+4);
 448                         got_clen = 1;
 449                 }
 450
 451                 /*
 452                  * Entering passive mode
 453                  */
 454                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
 455                         close_delete_and_die("PASV: %s", buf+4);
 456                 s = strrchr(buf, ',');
 457                 *s = 0;
 458                 port = atoi(s+1);
 459                 s = strrchr(buf, ',');
 460                 port += atoi(s+1) * 256;
 461                 dfp = open_socket(server.host, port);
 462
 463                 if (do_continue) {
 464                         sprintf(buf, "REST %ld", beg_range);
 465                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
 466                                 if (output != stdout)
 467                                         output = freopen(fname_out, "w", output);
 468                                 do_continue = 0;
 469                         } else
 470                                 filesize -= beg_range;
 471                 }
 472
 473                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
 474                         close_delete_and_die("RETR: %s", buf+4);
 475
 476         }
 477
 478
 479         /*
 480          * Retrieve file
 481          */
 482         if (chunked) {
 483                 fgets(buf, sizeof(buf), dfp);
 484                 filesize = strtol(buf, (char **) NULL, 16);
 485         }
 486 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 487         if (quiet_flag==FALSE)
 488                 progressmeter(-1);
 489 #endif
 490         do {
 491                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
 492                         if (safe_fwrite(buf, 1, n, output) != n)
 493                                 perror_msg_and_die("write error");
 494 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 495                 statbytes+=n;
 496 #endif
 497                 if (got_clen)
 498                         filesize -= n;
 499         }
 500
 501                 if (chunked) {
 502                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
 503                         safe_fgets(buf, sizeof(buf), dfp);
 504                         filesize = strtol(buf, (char **) NULL, 16);
 505                         if (filesize==0) chunked = 0; /* all done! */
 506                 }
 507
 508         if (n == 0 && ferror(dfp))
 509                 perror_msg_and_die("network read error");
 510         } while (chunked);
 511 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 512         if (quiet_flag==FALSE)
 513                 progressmeter(1);
 514 #endif
 515         if (!proxy && target.is_ftp) {
 516                 fclose(dfp);
 517                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
 518                         error_msg_and_die("ftp error: %s", buf+4);
 519                 ftpcmd("QUIT", NULL, sfp, buf);
 520         }
 521         exit(EXIT_SUCCESS);
 522 }
 523
 524
 525 void parse_url(char *url, struct host_info *h)
 526 {
 527         char *cp, *sp, *up;
 528
 529         if (strncmp(url, "http://", 7) == 0) {
 530                 h->port = 80;
 531                 h->host = url + 7;
 532                 h->is_ftp = 0;
 533         } else if (strncmp(url, "ftp://", 6) == 0) {
 534                 h->port = 21;
 535                 h->host = url + 6;
 536                 h->is_ftp = 1;
 537         } else
 538                 error_msg_and_die("not an http or ftp url: %s", url);
 539
 540         sp = strchr(h->host, '/');
 541         if (sp != NULL) {
 542                 *sp++ = '\0';
 543                 h->path = sp;
 544         } else
 545                 h->path = xstrdup("");
 546
 547         up = strrchr(h->host, '@');
 548         if (up != NULL) {
 549                 h->user = h->host;
 550                 *up++ = '\0';
 551                 h->host = up;
 552         } else
 553                 h->user = NULL;
 554
 555         cp = strchr(h->host, ':');
 556         if (cp != NULL) {
 557                 *cp++ = '\0';
 558                 h->port = atoi(cp);
 559         }
 560
 561 }
 562
 563
 564 FILE *open_socket(char *host, int port)
 565 {
 566         struct sockaddr_in s_in;
 567         struct hostent *hp;
 568         int fd;
 569         FILE *fp;
 570
 571         memset(&s_in, 0, sizeof(s_in));
 572         s_in.sin_family = AF_INET;
 573         hp = xgethostbyname(host);
 574         memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
 575         s_in.sin_port = htons(port);
 576
 577         /*
 578          * Get the server onto a stdio stream.
 579          */
 580         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
 581                 perror_msg_and_die("socket()");
 582         if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
 583                 perror_msg_and_die("connect(%s)", host);
 584         if ((fp = fdopen(fd, "r+")) == NULL)
 585                 perror_msg_and_die("fdopen()");
 586
 587         return fp;
 588 }
 589
 590
 591 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
 592 {
 593         char *s, *hdrval;
 594         int c;
 595
 596         *istrunc = 0;
 597
 598         /* retrieve header line */
 599         if (fgets(buf, bufsiz, fp) == NULL)
 600                 return NULL;
 601
 602         /* see if we are at the end of the headers */
 603         for (s = buf ; *s == '\r' ; ++s)
 604                 ;
 605         if (s[0] == '\n')
 606                 return NULL;
 607
 608         /* convert the header name to lower case */
 609         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
 610                 *s = tolower(*s);
 611
 612         /* verify we are at the end of the header name */
 613         if (*s != ':')
 614                 error_msg_and_die("bad header line: %s", buf);
 615
 616         /* locate the start of the header value */
 617         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
 618                 ;
 619         hdrval = s;
 620
 621         /* locate the end of header */
 622         while (*s != '\0' && *s != '\r' && *s != '\n')
 623                 ++s;
 624
 625         /* end of header found */
 626         if (*s != '\0') {
 627                 *s = '\0';
 628                 return hdrval;
 629         }
 630
 631         /* Rats!  The buffer isn't big enough to hold the entire header value. */
 632         while (c = getc(fp), c != EOF && c != '\n')
 633                 ;
 634         *istrunc = 1;
 635         return hdrval;
 636 }
 637
 638 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
 639 {
 640         char *p;
 641
 642         if (s1) {
 643                 if (!s2) s2="";
 644                 fprintf(fp, "%s%s\n", s1, s2);
 645                 fflush(fp);
 646         }
 647
 648         do {
 649                 p = fgets(buf, 510, fp);
 650                 if (!p)
 651                         perror_msg_and_die("fgets()");
 652         } while (! isdigit(buf[0]) || buf[3] != ' ');
 653
 654         return atoi(buf);
 655 }
 656
 657 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
 658 /* Stuff below is from BSD rcp util.c, as added to openshh.
 659  * Original copyright notice is retained at the end of this file.
 660  *
 661  */
 662
 663
 664 static int
 665 getttywidth(void)
 666 {
 667         struct winsize winsize;
 668
 669         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
 670                 return (winsize.ws_col ? winsize.ws_col : 80);
 671         else
 672                 return (80);
 673 }
 674
 675 static void
 676 updateprogressmeter(int ignore)
 677 {
 678         int save_errno = errno;
 679
 680         progressmeter(0);
 681         errno = save_errno;
 682 }
 683
 684 static void
 685 alarmtimer(int wait)
 686 {
 687         struct itimerval itv;
 688
 689         itv.it_value.tv_sec = wait;
 690         itv.it_value.tv_usec = 0;
 691         itv.it_interval = itv.it_value;
 692         setitimer(ITIMER_REAL, &itv, NULL);
 693 }
 694
 695
 696 static void
 697 progressmeter(int flag)
 698 {
 699         static const char prefixes[] = " KMGTP";
 700         static struct timeval lastupdate;
 701         static off_t lastsize, totalsize;
 702         struct timeval now, td, wait;
 703         off_t cursize, abbrevsize;
 704         double elapsed;
 705         int ratio, barlength, i, remaining;
 706         char buf[256];
 707
 708         if (flag == -1) {
 709                 (void) gettimeofday(&start, (struct timezone *) 0);
 710                 lastupdate = start;
 711                 lastsize = 0;
 712                 totalsize = filesize; /* as filesize changes.. */
 713         }
 714
 715         (void) gettimeofday(&now, (struct timezone *) 0);
 716         cursize = statbytes;
 717         if (totalsize != 0 && !chunked) {
 718                 ratio = 100.0 * cursize / totalsize;
 719                 ratio = MAX(ratio, 0);
 720                 ratio = MIN(ratio, 100);
 721         } else
 722                 ratio = 100;
 723
 724         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
 725
 726         barlength = getttywidth() - 51;
 727         if (barlength > 0) {
 728                 i = barlength * ratio / 100;
 729                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 730                          "|%.*s%*s|", i,
 731                          "*****************************************************************************"
 732                          "*****************************************************************************",
 733                          barlength - i, "");
 734         }
 735         i = 0;
 736         abbrevsize = cursize;
 737         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
 738                 i++;
 739                 abbrevsize >>= 10;
 740         }
 741         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
 742              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
 743                  'B');
 744
 745         timersub(&now, &lastupdate, &wait);
 746         if (cursize > lastsize) {
 747                 lastupdate = now;
 748                 lastsize = cursize;
 749                 if (wait.tv_sec >= STALLTIME) {
 750                         start.tv_sec += wait.tv_sec;
 751                         start.tv_usec += wait.tv_usec;
 752                 }
 753                 wait.tv_sec = 0;
 754         }
 755         timersub(&now, &start, &td);
 756         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
 757
 758         if (wait.tv_sec >= STALLTIME) {
 759                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 760                          " - stalled -");
 761         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
 762                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 763                          "   --:-- ETA");
 764         } else {
 765                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
 766                 i = remaining / 3600;
 767                 if (i)
 768                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 769                                  "%2d:", i);
 770                 else
 771                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 772                                  "   ");
 773                 i = remaining % 3600;
 774                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
 775                          "%02d:%02d ETA", i / 60, i % 60);
 776         }
 777         write(fileno(stderr), buf, strlen(buf));
 778
 779         if (flag == -1) {
 780                 struct sigaction sa;
 781                 sa.sa_handler = updateprogressmeter;
 782                 sigemptyset(&sa.sa_mask);
 783                 sa.sa_flags = SA_RESTART;
 784                 sigaction(SIGALRM, &sa, NULL);
 785                 alarmtimer(1);
 786         } else if (flag == 1) {
 787                 alarmtimer(0);
 788                 statbytes = 0;
 789                 putc('\n', stderr);
 790         }
 791 }
 792 #endif
 793
 794 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
 795  * much of which was blatently stolen from openssh.  */
 796
 797 /*-
 798  * Copyright (c) 1992, 1993
 799  *      The Regents of the University of California.  All rights reserved.
 800  *
 801  * Redistribution and use in source and binary forms, with or without
 802  * modification, are permitted provided that the following conditions
 803  * are met:
 804  * 1. Redistributions of source code must retain the above copyright
 805  *    notice, this list of conditions and the following disclaimer.
 806  * 2. Redistributions in binary form must reproduce the above copyright
 807  *    notice, this list of conditions and the following disclaimer in the
 808  *    documentation and/or other materials provided with the distribution.
 809  *
 810  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change
 811  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change>
 812  *
 813  * 4. Neither the name of the University nor the names of its contributors
 814  *    may be used to endorse or promote products derived from this software
 815  *    without specific prior written permission.
 816  *
 817  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 818  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 819  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 820  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 821  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 822  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 823  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 824  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 825  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 826  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 827  * SUCH DAMAGE.
 828  *
 829  *      $Id: wget.c,v 1.49 2002/05/14 23:36:45 sandman Exp $
 830  */
 831
 832
 833
 834 /*
 835 Local Variables:
 836 c-file-style: "linux"
 837 c-basic-offset: 4
 838 tab-width: 4
 839 End:
 840 */
 841
 842
 843