Manousaridis Angelos writes:
[oweals/busybox.git] / 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 struct host_info {
35         char *host;
36         int port;
37         char *path;
38         int is_ftp;
39         char *user;
40 };
41
42 static void parse_url(char *url, struct host_info *h);
43 static FILE *open_socket(struct sockaddr_in *s_in, int port);
44 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
45 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
46
47 /* Globals (can be accessed from signal handlers */
48 static off_t filesize = 0;              /* content-length of the file */
49 static int chunked = 0;                 /* chunked transfer encoding */
50 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
51 static void progressmeter(int flag);
52 static char *curfile;                   /* Name of current file being transferred. */
53 static struct timeval start;    /* Time a transfer started. */
54 static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
55 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
56 static const int STALLTIME = 5;
57 #endif
58                 
59 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
60 {
61         if (output != stdout && do_continue==0) {
62                 fclose(output);
63                 unlink(fname_out);
64         }
65 }
66
67 /* Read NMEMB elements of SIZE bytes into PTR from STREAM.  Returns the
68  * number of elements read, and a short count if an eof or non-interrupt
69  * error is encountered.  */
70 static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
71 {
72         size_t ret = 0;
73
74         do {
75                 clearerr(stream);
76                 ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
77         } while (ret < nmemb && ferror(stream) && errno == EINTR);
78
79         return ret;
80 }
81
82 /* Write NMEMB elements of SIZE bytes from PTR to STREAM.  Returns the
83  * number of elements written, and a short count if an eof or non-interrupt
84  * error is encountered.  */
85 static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream)
86 {
87         size_t ret = 0;
88
89         do {
90                 clearerr(stream);
91                 ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
92         } while (ret < nmemb && ferror(stream) && errno == EINTR);
93
94         return ret;
95 }
96
97 /* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM.
98  * Returns S, or NULL if an eof or non-interrupt error is encountered.  */
99 static char *safe_fgets(char *s, int size, FILE *stream)
100 {
101         char *ret;
102
103         do {
104                 clearerr(stream);
105                 ret = fgets(s, size, stream);
106         } while (ret == NULL && ferror(stream) && errno == EINTR);
107
108         return ret;
109 }
110
111 #define close_delete_and_die(s...) { \
112         close_and_delete_outfile(output, fname_out, do_continue); \
113         bb_error_msg_and_die(s); }
114
115
116 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
117 /*
118  *  Base64-encode character string
119  *  oops... isn't something similar in uuencode.c?
120  *  It would be better to use already existing code
121  */
122 char *base64enc(char *p, char *buf, int len) {
123
124         char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
125                     "0123456789+/";
126                 char *s = buf;
127
128         while(*p) {
129                                 if (s >= buf+len-4)
130                                         bb_error_msg_and_die("buffer overflow");
131                 *(s++) = al[(*p >> 2) & 0x3F];
132                 *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
133                 *s = *(s+1) = '=';
134                 *(s+2) = 0;
135                 if (! *(++p)) break;
136                 *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
137                 if (! *(++p)) break;
138                 *(s++) = al[*(p++) & 0x3F];
139         }
140
141                 return buf;
142 }
143 #endif
144
145 int wget_main(int argc, char **argv)
146 {
147         int n, try=5, status;
148         int port;
149         char *proxy = 0;
150         char *dir_prefix=NULL;
151         char *s, buf[512];
152         struct stat sbuf;
153         char extra_headers[1024];
154         char *extra_headers_ptr = extra_headers;
155         int extra_headers_left = sizeof(extra_headers);
156         int which_long_opt = 0, option_index = -1;
157         struct host_info server, target;
158         struct sockaddr_in s_in;
159
160         FILE *sfp = NULL;                       /* socket to web/ftp server                     */
161         FILE *dfp = NULL;                       /* socket to ftp server (data)          */
162         char *fname_out = NULL;         /* where to direct output (-O)          */
163         int do_continue = 0;            /* continue a prev transfer (-c)        */
164         long beg_range = 0L;            /*   range at which continue begins     */
165         int got_clen = 0;                       /* got content-length: from server      */
166         FILE *output;                           /* socket to web server                         */
167         int quiet_flag = FALSE;         /* Be verry, verry quiet...                     */
168         int noproxy = 0;            /* Use proxies if env vars are set  */
169
170 #define LONG_HEADER    1
171 #define LONG_PASSIVE   2
172
173         struct option long_options[] = {
174                 { "continue",        0, NULL, 'c' },
175                 { "quiet",           0, NULL, 'q' },
176                 { "output-document", 1, NULL, 'O' },
177                 { "header",              1, &which_long_opt, LONG_HEADER },
178                 { "proxy",           1, NULL, 'Y' },
179                 { "passive-ftp",     0, &which_long_opt, LONG_PASSIVE },
180                 { 0,                 0, 0, 0 }
181         };
182         /*
183          * Crack command line.
184          */
185         while ((n = getopt_long(argc, argv, "cqO:P:Y:", long_options, &option_index)) != EOF) {
186                 switch (n) {
187                 case 'c':
188                         ++do_continue;
189                         break;
190                 case 'P':
191                         dir_prefix = optarg;
192                         break;
193                 case 'q':
194                         quiet_flag = TRUE;
195                         break;
196                 case 'O':
197                         /* can't set fname_out to NULL if outputting to stdout, because
198                          * this gets interpreted as the auto-gen output filename
199                          * case below  - tausq@debian.org
200                          */
201                         fname_out = optarg;
202                         break;
203                 case 'Y':
204                         if (strcmp(optarg, "off") == 0)
205                                 noproxy=1;      
206                         break;
207                 case 0:
208                         switch (which_long_opt) {
209                                 case LONG_HEADER: {
210                                         int arglen = strlen(optarg);
211                                         if(extra_headers_left - arglen - 2 <= 0)
212                                                 bb_error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
213                                         strcpy(extra_headers_ptr, optarg);
214                                         extra_headers_ptr += arglen;
215                                         extra_headers_left -= ( arglen + 2 );
216                                         *extra_headers_ptr++ = '\r';
217                                         *extra_headers_ptr++ = '\n';
218                                         *(extra_headers_ptr + 1) = 0;
219                                         break;
220                                 }
221                                 case LONG_PASSIVE:
222                                         // ignore -- we always use passive mode
223                                         break;
224                         }
225                         break;
226                 default:
227                         bb_show_usage();
228                 }
229         }
230
231         if (argc - optind != 1)
232                         bb_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         if (!noproxy) {
242                 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
243                 if (proxy)
244                         parse_url(bb_xstrdup(proxy), &server);
245         }
246         
247         /* Guess an output filename */
248         if (!fname_out) {
249                 fname_out = 
250 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
251                         curfile = 
252 #endif
253                         bb_get_last_path_component(target.path);
254                 if (fname_out==NULL || strlen(fname_out)<1) {
255                         fname_out = 
256 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
257                                 curfile = 
258 #endif
259                                 "index.html";
260                 }
261                 if (dir_prefix != NULL)
262                         fname_out = concat_path_file(dir_prefix, fname_out);
263 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
264         } else {
265                 curfile = bb_get_last_path_component(fname_out);
266 #endif
267         }
268         if (do_continue && !fname_out)
269                 bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
270
271
272         /*
273          * Open the output file stream.
274          */
275         if (strcmp(fname_out, "-") == 0) {
276                 output = stdout;
277                 quiet_flag = TRUE;
278         } else {
279                 output = bb_xfopen(fname_out, (do_continue ? "a" : "w"));
280         }
281
282         /*
283          * Determine where to start transfer.
284          */
285         if (do_continue) {
286                 if (fstat(fileno(output), &sbuf) < 0)
287                         bb_perror_msg_and_die("fstat()");
288                 if (sbuf.st_size > 0)
289                         beg_range = sbuf.st_size;
290                 else
291                         do_continue = 0;
292         }
293
294         /* We want to do exactly _one_ DNS lookup, since some
295          * sites (i.e. ftp.us.debian.org) use round-robin DNS
296          * and we want to connect to only one IP... */
297         bb_lookup_host(&s_in, server.host, NULL);
298         if (quiet_flag==FALSE) {
299                 fprintf(stdout, "Connecting to %s[%s]:%d\n",
300                                 server.host, inet_ntoa(s_in.sin_addr), server.port);
301         }
302
303         if (proxy || !target.is_ftp) {
304                 /*
305                  *  HTTP session
306                  */
307                 do {
308                         got_clen = chunked = 0;
309
310                         if (! --try)
311                                 close_delete_and_die("too many redirections");
312
313                         /*
314                          * Open socket to http server
315                          */
316                         if (sfp) fclose(sfp);
317                         sfp = open_socket(&s_in, server.port);
318                         
319                         /*
320                          * Send HTTP request.
321                          */
322                         if (proxy) {
323                                 const char *format = "GET %stp://%s:%d/%s HTTP/1.1\r\n";
324 #ifdef CONFIG_FEATURE_WGET_IP6_LITERAL
325                                 if (strchr (target.host, ':'))
326                                         format = "GET %stp://[%s]:%d/%s HTTP/1.1\r\n";
327 #endif
328                                 fprintf(sfp, format,
329                                         target.is_ftp ? "f" : "ht", target.host,
330                                         target.port, target.path);
331                         } else {
332                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
333                         }
334
335                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
336
337 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
338                         if (target.user) {
339                                 fprintf(sfp, "Authorization: Basic %s\r\n",
340                                         base64enc(target.user, buf, sizeof(buf)));
341                         }
342                         if (proxy && server.user) {
343                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
344                                         base64enc(server.user, buf, sizeof(buf)));
345                         }
346 #endif
347
348                         if (do_continue)
349                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
350                         if(extra_headers_left < sizeof(extra_headers))
351                                 fputs(extra_headers,sfp);
352                         fprintf(sfp,"Connection: close\r\n\r\n");
353
354                         /*
355                         * Retrieve HTTP response line and check for "200" status code.
356                         */
357 read_response:
358                         if (fgets(buf, sizeof(buf), sfp) == NULL)
359                                 close_delete_and_die("no response from server");
360                                 
361                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
362                         ;
363                         for ( ; isspace(*s) ; ++s)
364                         ;
365                         switch (status = atoi(s)) {
366                                 case 0:
367                                 case 100:
368                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
369                                         goto read_response;
370                                 case 200:
371                                         if (do_continue && output != stdout)
372                                                 output = freopen(fname_out, "w", output);
373                                         do_continue = 0;
374                                         break;
375                                 case 300:       /* redirection */
376                                 case 301:
377                                 case 302:
378                                 case 303:
379                                         break;
380                                 case 206:
381                                         if (do_continue)
382                                                 break;
383                                         /*FALLTHRU*/
384                                 default:
385                                         chomp(buf);
386                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
387                         }
388                 
389                         /*
390                          * Retrieve HTTP headers.
391                          */
392                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
393                                 if (strcasecmp(buf, "content-length") == 0) {
394                                         filesize = atol(s);
395                                         got_clen = 1;
396                                         continue;
397                                 }
398                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
399                                         if (strcasecmp(s, "chunked") == 0) {
400                                                 chunked = got_clen = 1;
401                                         } else {
402                                         close_delete_and_die("server wants to do %s transfer encoding", s);
403                                         }
404                                 }
405                                 if (strcasecmp(buf, "location") == 0) {
406                                         if (s[0] == '/')
407                                                 target.path = bb_xstrdup(s+1);
408                                         else {
409                                                 parse_url(bb_xstrdup(s), &target);
410                                                 if (!proxy) {
411                                                         server.host = target.host;
412                                                         server.port = target.port;
413                                                 }
414                                         }
415                                 }
416                         }
417                 } while(status >= 300);
418                 
419                 dfp = sfp;
420         }
421         else
422         {
423                 /*
424                  *  FTP session
425                  */
426                 if (! target.user)
427                         target.user = bb_xstrdup("anonymous:busybox@");
428
429                 sfp = open_socket(&s_in, server.port);
430                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
431                         close_delete_and_die("%s", buf+4);
432
433                 /* 
434                  * Splitting username:password pair,
435                  * trying to log in
436                  */
437                 s = strchr(target.user, ':');
438                 if (s)
439                         *(s++) = '\0';
440                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
441                         case 230:
442                                 break;
443                         case 331:
444                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
445                                         break;
446                                 /* FALLTHRU (failed login) */
447                         default:
448                                 close_delete_and_die("ftp login: %s", buf+4);
449                 }
450                 
451                 ftpcmd("CDUP", NULL, sfp, buf);
452                 ftpcmd("TYPE I", NULL, sfp, buf);
453                 
454                 /*
455                  * Querying file size
456                  */
457                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
458                         filesize = atol(buf+4);
459                         got_clen = 1;
460                 }
461                 
462                 /*
463                  * Entering passive mode
464                  */
465                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
466                         close_delete_and_die("PASV: %s", buf+4);
467                 s = strrchr(buf, ',');
468                 *s = 0;
469                 port = atoi(s+1);
470                 s = strrchr(buf, ',');
471                 port += atoi(s+1) * 256;
472                 dfp = open_socket(&s_in, port);
473
474                 if (do_continue) {
475                         sprintf(buf, "REST %ld", beg_range);
476                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
477                                 if (output != stdout)
478                                         output = freopen(fname_out, "w", output);
479                                 do_continue = 0;
480                         } else
481                                 filesize -= beg_range;
482                 }
483                 
484                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
485                         close_delete_and_die("RETR: %s", buf+4);
486
487         }
488
489
490         /*
491          * Retrieve file
492          */
493         if (chunked) {
494                 fgets(buf, sizeof(buf), dfp);
495                 filesize = strtol(buf, (char **) NULL, 16);
496         }
497 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
498         if (quiet_flag==FALSE)
499                 progressmeter(-1);
500 #endif
501         do {
502                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, ((chunked || got_clen) && (filesize < sizeof(buf)) ? filesize : sizeof(buf)), dfp)) > 0) {
503                         if (safe_fwrite(buf, 1, n, output) != n) {
504                                 bb_perror_msg_and_die("write error");
505                         }
506 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
507                         statbytes+=n;
508 #endif
509                         if (got_clen) {
510                                 filesize -= n;
511                         }
512                 }
513
514                 if (chunked) {
515                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
516                         safe_fgets(buf, sizeof(buf), dfp);
517                         filesize = strtol(buf, (char **) NULL, 16);
518                         if (filesize==0) {
519                                 chunked = 0; /* all done! */
520                         }
521                 }
522
523                 if (n == 0 && ferror(dfp)) {
524                         bb_perror_msg_and_die("network read error");
525                 }
526         } while (chunked);
527 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
528         if (quiet_flag==FALSE)
529                 progressmeter(1);
530 #endif
531         if (!proxy && target.is_ftp) {
532                 fclose(dfp);
533                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
534                         bb_error_msg_and_die("ftp error: %s", buf+4);
535                 ftpcmd("QUIT", NULL, sfp, buf);
536         }
537         exit(EXIT_SUCCESS);
538 }
539
540
541 void parse_url(char *url, struct host_info *h)
542 {
543         char *cp, *sp, *up, *pp;
544
545         if (strncmp(url, "http://", 7) == 0) {
546                 h->port = 80;
547                 h->host = url + 7;
548                 h->is_ftp = 0;
549         } else if (strncmp(url, "ftp://", 6) == 0) {
550                 h->port = 21;
551                 h->host = url + 6;
552                 h->is_ftp = 1;
553         } else
554                 bb_error_msg_and_die("not an http or ftp url: %s", url);
555
556         sp = strchr(h->host, '/');
557         if (sp != NULL) {
558                 *sp++ = '\0';
559                 h->path = sp;
560         } else
561                 h->path = bb_xstrdup("");
562
563         up = strrchr(h->host, '@');
564         if (up != NULL) {
565                 h->user = h->host;
566                 *up++ = '\0';
567                 h->host = up;
568         } else
569                 h->user = NULL;
570
571         pp = h->host;
572
573 #ifdef CONFIG_FEATURE_WGET_IP6_LITERAL
574         if (h->host[0] == '[') {
575                 char *ep;
576
577                 ep = h->host + 1;
578                 while (*ep == ':' || isxdigit (*ep))
579                         ep++;
580                 if (*ep == ']') {
581                         h->host++;
582                         *ep = '\0';
583                         pp = ep + 1;
584                 }
585         }
586 #endif
587
588         cp = strchr(pp, ':');
589         if (cp != NULL) {
590                 *cp++ = '\0';
591                 h->port = atoi(cp);
592         }
593
594 }
595
596
597 FILE *open_socket(struct sockaddr_in *s_in, int port)
598 {
599         int fd;
600         FILE *fp;
601
602         if (port>0 && port < 65536) {
603                 s_in->sin_port=htons(port);
604         }
605
606         fd=xconnect(s_in);
607
608         /*
609          * Get the server onto a stdio stream.
610          */
611         if ((fp = fdopen(fd, "r+")) == NULL)
612                 bb_perror_msg_and_die("fdopen()");
613
614         return fp;
615 }
616
617
618 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
619 {
620         char *s, *hdrval;
621         int c;
622
623         *istrunc = 0;
624
625         /* retrieve header line */
626         if (fgets(buf, bufsiz, fp) == NULL)
627                 return NULL;
628
629         /* see if we are at the end of the headers */
630         for (s = buf ; *s == '\r' ; ++s)
631                 ;
632         if (s[0] == '\n')
633                 return NULL;
634
635         /* convert the header name to lower case */
636         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
637                 *s = tolower(*s);
638
639         /* verify we are at the end of the header name */
640         if (*s != ':')
641                 bb_error_msg_and_die("bad header line: %s", buf);
642
643         /* locate the start of the header value */
644         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
645                 ;
646         hdrval = s;
647
648         /* locate the end of header */
649         while (*s != '\0' && *s != '\r' && *s != '\n')
650                 ++s;
651
652         /* end of header found */
653         if (*s != '\0') {
654                 *s = '\0';
655                 return hdrval;
656         }
657
658         /* Rats!  The buffer isn't big enough to hold the entire header value. */
659         while (c = getc(fp), c != EOF && c != '\n')
660                 ;
661         *istrunc = 1;
662         return hdrval;
663 }
664
665 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
666 {
667         char *p;
668         
669         if (s1) {
670                 if (!s2) s2="";
671                 fprintf(fp, "%s%s\r\n", s1, s2);
672                 fflush(fp);
673         }
674         
675         do {
676                 p = fgets(buf, 510, fp);
677                 if (!p)
678                         bb_perror_msg_and_die("fgets()");
679         } while (! isdigit(buf[0]) || buf[3] != ' ');
680         
681         return atoi(buf);
682 }
683
684 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
685 /* Stuff below is from BSD rcp util.c, as added to openshh. 
686  * Original copyright notice is retained at the end of this file.
687  * 
688  */ 
689
690
691 static int
692 getttywidth(void)
693 {
694         int width=0;
695         get_terminal_width_height(0, &width, NULL);
696         return (width);
697 }
698
699 static void
700 updateprogressmeter(int ignore)
701 {
702         int save_errno = errno;
703
704         progressmeter(0);
705         errno = save_errno;
706 }
707
708 static void
709 alarmtimer(int wait)
710 {
711         struct itimerval itv;
712
713         itv.it_value.tv_sec = wait;
714         itv.it_value.tv_usec = 0;
715         itv.it_interval = itv.it_value;
716         setitimer(ITIMER_REAL, &itv, NULL);
717 }
718
719
720 static void
721 progressmeter(int flag)
722 {
723         static const char prefixes[] = " KMGTP";
724         static struct timeval lastupdate;
725         static off_t lastsize, totalsize;
726         struct timeval now, td, wait;
727         off_t cursize, abbrevsize;
728         double elapsed;
729         int ratio, barlength, i, remaining;
730         char buf[256];
731
732         if (flag == -1) {
733                 (void) gettimeofday(&start, (struct timezone *) 0);
734                 lastupdate = start;
735                 lastsize = 0;
736                 totalsize = filesize; /* as filesize changes.. */
737         }
738
739         (void) gettimeofday(&now, (struct timezone *) 0);
740         cursize = statbytes;
741         if (totalsize != 0 && !chunked) {
742                 ratio = 100.0 * cursize / totalsize;
743                 ratio = MAX(ratio, 0);
744                 ratio = MIN(ratio, 100);
745         } else
746                 ratio = 100;
747
748         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
749
750         barlength = getttywidth() - 51;
751         if (barlength > 0) {
752                 i = barlength * ratio / 100;
753                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
754                          "|%.*s%*s|", i,
755                          "*****************************************************************************"
756                          "*****************************************************************************",
757                          barlength - i, "");
758         }
759         i = 0;
760         abbrevsize = cursize;
761         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
762                 i++;
763                 abbrevsize >>= 10;
764         }
765         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
766              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
767                  'B');
768
769         timersub(&now, &lastupdate, &wait);
770         if (cursize > lastsize) {
771                 lastupdate = now;
772                 lastsize = cursize;
773                 if (wait.tv_sec >= STALLTIME) {
774                         start.tv_sec += wait.tv_sec;
775                         start.tv_usec += wait.tv_usec;
776                 }
777                 wait.tv_sec = 0;
778         }
779         timersub(&now, &start, &td);
780         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
781
782         if (wait.tv_sec >= STALLTIME) {
783                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
784                          " - stalled -");
785         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
786                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
787                          "   --:-- ETA");
788         } else {
789                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
790                 i = remaining / 3600;
791                 if (i)
792                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
793                                  "%2d:", i);
794                 else
795                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
796                                  "   ");
797                 i = remaining % 3600;
798                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
799                          "%02d:%02d ETA", i / 60, i % 60);
800         }
801         write(fileno(stderr), buf, strlen(buf));
802
803         if (flag == -1) {
804                 struct sigaction sa;
805                 sa.sa_handler = updateprogressmeter;
806                 sigemptyset(&sa.sa_mask);
807                 sa.sa_flags = SA_RESTART;
808                 sigaction(SIGALRM, &sa, NULL);
809                 alarmtimer(1);
810         } else if (flag == 1) {
811                 alarmtimer(0);
812                 statbytes = 0;
813                 putc('\n', stderr);
814         }
815 }
816 #endif
817
818 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
819  * much of which was blatently stolen from openssh.  */
820  
821 /*-
822  * Copyright (c) 1992, 1993
823  *      The Regents of the University of California.  All rights reserved.
824  *
825  * Redistribution and use in source and binary forms, with or without
826  * modification, are permitted provided that the following conditions
827  * are met:
828  * 1. Redistributions of source code must retain the above copyright
829  *    notice, this list of conditions and the following disclaimer.
830  * 2. Redistributions in binary form must reproduce the above copyright
831  *    notice, this list of conditions and the following disclaimer in the
832  *    documentation and/or other materials provided with the distribution.
833  *
834  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change 
835  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> 
836  *
837  * 4. Neither the name of the University nor the names of its contributors
838  *    may be used to endorse or promote products derived from this software
839  *    without specific prior written permission.
840  *
841  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
842  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
843  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
844  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
845  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
846  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
847  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
848  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
849  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
850  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
851  * SUCH DAMAGE.
852  *
853  *      $Id: wget.c,v 1.61 2003/10/31 09:31:43 andersen Exp $
854  */
855
856
857
858 /*
859 Local Variables:
860 c-file-style: "linux"
861 c-basic-offset: 4
862 tab-width: 4
863 End:
864 */