5ea559b8930fef1417f12063819c6ca8231df879
[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(char *host, 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
159         FILE *sfp = NULL;                       /* socket to web/ftp server                     */
160         FILE *dfp = NULL;                       /* socket to ftp server (data)          */
161         char *fname_out = NULL;         /* where to direct output (-O)          */
162         int do_continue = 0;            /* continue a prev transfer (-c)        */
163         long beg_range = 0L;            /*   range at which continue begins     */
164         int got_clen = 0;                       /* got content-length: from server      */
165         FILE *output;                           /* socket to web server                         */
166         int quiet_flag = FALSE;         /* Be verry, verry quiet...                     */
167         int noproxy = 0;            /* Use proxies if env vars are set  */
168
169 #define LONG_HEADER    1
170 #define LONG_PASSIVE   2
171
172         struct option long_options[] = {
173                 { "continue",        0, NULL, 'c' },
174                 { "quiet",           0, NULL, 'q' },
175                 { "output-document", 1, NULL, 'O' },
176                 { "header",              1, &which_long_opt, LONG_HEADER },
177                 { "proxy",           1, NULL, 'Y' },
178                 { "passive-ftp",     0, &which_long_opt, LONG_PASSIVE },
179                 { 0,                 0, 0, 0 }
180         };
181         /*
182          * Crack command line.
183          */
184         while ((n = getopt_long(argc, argv, "cqO:P:Y:", long_options, &option_index)) != EOF) {
185                 switch (n) {
186                 case 'c':
187                         ++do_continue;
188                         break;
189                 case 'P':
190                         dir_prefix = optarg;
191                         break;
192                 case 'q':
193                         quiet_flag = TRUE;
194                         break;
195                 case 'O':
196                         /* can't set fname_out to NULL if outputting to stdout, because
197                          * this gets interpreted as the auto-gen output filename
198                          * case below  - tausq@debian.org
199                          */
200                         fname_out = optarg;
201                         break;
202                 case 'Y':
203                         if (strcmp(optarg, "off") == 0)
204                                 noproxy=1;      
205                         break;
206                 case 0:
207                         switch (which_long_opt) {
208                                 case LONG_HEADER: {
209                                         int arglen = strlen(optarg);
210                                         if(extra_headers_left - arglen - 2 <= 0)
211                                                 bb_error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
212                                         strcpy(extra_headers_ptr, optarg);
213                                         extra_headers_ptr += arglen;
214                                         extra_headers_left -= ( arglen + 2 );
215                                         *extra_headers_ptr++ = '\r';
216                                         *extra_headers_ptr++ = '\n';
217                                         *(extra_headers_ptr + 1) = 0;
218                                         break;
219                                 }
220                                 case LONG_PASSIVE:
221                                         // ignore -- we always use passive mode
222                                         break;
223                         }
224                         break;
225                 default:
226                         bb_show_usage();
227                 }
228         }
229
230         if (argc - optind != 1)
231                         bb_show_usage();
232
233         parse_url(argv[optind], &target);
234         server.host = target.host;
235         server.port = target.port;
236
237         /*
238          * Use the proxy if necessary.
239          */
240         if (!noproxy) {
241                 proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
242                 if (proxy)
243                         parse_url(bb_xstrdup(proxy), &server);
244         }
245         
246         /* Guess an output filename */
247         if (!fname_out) {
248                 fname_out = 
249 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
250                         curfile = 
251 #endif
252                         bb_get_last_path_component(target.path);
253                 if (fname_out==NULL || strlen(fname_out)<1) {
254                         fname_out = 
255 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
256                                 curfile = 
257 #endif
258                                 "index.html";
259                 }
260                 if (dir_prefix != NULL)
261                         fname_out = concat_path_file(dir_prefix, fname_out);
262 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
263         } else {
264                 curfile = bb_get_last_path_component(fname_out);
265 #endif
266         }
267         if (do_continue && !fname_out)
268                 bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
269
270
271         /*
272          * Open the output file stream.
273          */
274         if (strcmp(fname_out, "-") == 0) {
275                 output = stdout;
276                 quiet_flag = TRUE;
277         } else {
278                 output = bb_xfopen(fname_out, (do_continue ? "a" : "w"));
279         }
280
281         /*
282          * Determine where to start transfer.
283          */
284         if (do_continue) {
285                 if (fstat(fileno(output), &sbuf) < 0)
286                         bb_perror_msg_and_die("fstat()");
287                 if (sbuf.st_size > 0)
288                         beg_range = sbuf.st_size;
289                 else
290                         do_continue = 0;
291         }
292
293         if (proxy || !target.is_ftp) {
294                 /*
295                  *  HTTP session
296                  */
297                 do {
298                         got_clen = chunked = 0;
299
300                         if (! --try)
301                                 close_delete_and_die("too many redirections");
302
303                         /*
304                          * Open socket to http server
305                          */
306                         if (sfp) fclose(sfp);
307                         sfp = open_socket(server.host, server.port);
308                         
309                         /*
310                          * Send HTTP request.
311                          */
312                         if (proxy) {
313                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
314                                         target.is_ftp ? "f" : "ht", target.host,
315                                         target.port, target.path);
316                         } else {
317                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
318                         }
319
320                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
321
322 #ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
323                         if (target.user) {
324                                 fprintf(sfp, "Authorization: Basic %s\r\n",
325                                         base64enc(target.user, buf, sizeof(buf)));
326                         }
327                         if (proxy && server.user) {
328                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
329                                         base64enc(server.user, buf, sizeof(buf)));
330                         }
331 #endif
332
333                         if (do_continue)
334                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
335                         if(extra_headers_left < sizeof(extra_headers))
336                                 fputs(extra_headers,sfp);
337                         fprintf(sfp,"Connection: close\r\n\r\n");
338
339                         /*
340                         * Retrieve HTTP response line and check for "200" status code.
341                         */
342 read_response:
343                         if (fgets(buf, sizeof(buf), sfp) == NULL)
344                                 close_delete_and_die("no response from server");
345                                 
346                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
347                         ;
348                         for ( ; isspace(*s) ; ++s)
349                         ;
350                         switch (status = atoi(s)) {
351                                 case 0:
352                                 case 100:
353                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
354                                         goto read_response;
355                                 case 200:
356                                         if (do_continue && output != stdout)
357                                                 output = freopen(fname_out, "w", output);
358                                         do_continue = 0;
359                                         break;
360                                 case 300:       /* redirection */
361                                 case 301:
362                                 case 302:
363                                 case 303:
364                                         break;
365                                 case 206:
366                                         if (do_continue)
367                                                 break;
368                                         /*FALLTHRU*/
369                                 default:
370                                         chomp(buf);
371                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
372                         }
373                 
374                         /*
375                          * Retrieve HTTP headers.
376                          */
377                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
378                                 if (strcasecmp(buf, "content-length") == 0) {
379                                         filesize = atol(s);
380                                         got_clen = 1;
381                                         continue;
382                                 }
383                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
384                                         if (strcasecmp(s, "chunked") == 0) {
385                                                 chunked = got_clen = 1;
386                                         } else {
387                                         close_delete_and_die("server wants to do %s transfer encoding", s);
388                                         }
389                                 }
390                                 if (strcasecmp(buf, "location") == 0) {
391                                         if (s[0] == '/')
392                                                 target.path = bb_xstrdup(s+1);
393                                         else {
394                                                 parse_url(bb_xstrdup(s), &target);
395                                                 if (!proxy) {
396                                                         server.host = target.host;
397                                                         server.port = target.port;
398                                                 }
399                                         }
400                                 }
401                         }
402                 } while(status >= 300);
403                 
404                 dfp = sfp;
405         }
406         else
407         {
408                 /*
409                  *  FTP session
410                  */
411                 if (! target.user)
412                         target.user = bb_xstrdup("anonymous:busybox@");
413
414                 sfp = open_socket(server.host, server.port);
415                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
416                         close_delete_and_die("%s", buf+4);
417
418                 /* 
419                  * Splitting username:password pair,
420                  * trying to log in
421                  */
422                 s = strchr(target.user, ':');
423                 if (s)
424                         *(s++) = '\0';
425                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
426                         case 230:
427                                 break;
428                         case 331:
429                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
430                                         break;
431                                 /* FALLTHRU (failed login) */
432                         default:
433                                 close_delete_and_die("ftp login: %s", buf+4);
434                 }
435                 
436                 ftpcmd("CDUP", NULL, sfp, buf);
437                 ftpcmd("TYPE I", NULL, sfp, buf);
438                 
439                 /*
440                  * Querying file size
441                  */
442                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
443                         filesize = atol(buf+4);
444                         got_clen = 1;
445                 }
446                 
447                 /*
448                  * Entering passive mode
449                  */
450                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
451                         close_delete_and_die("PASV: %s", buf+4);
452                 s = strrchr(buf, ',');
453                 *s = 0;
454                 port = atoi(s+1);
455                 s = strrchr(buf, ',');
456                 port += atoi(s+1) * 256;
457                 dfp = open_socket(server.host, port);
458
459                 if (do_continue) {
460                         sprintf(buf, "REST %ld", beg_range);
461                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
462                                 if (output != stdout)
463                                         output = freopen(fname_out, "w", output);
464                                 do_continue = 0;
465                         } else
466                                 filesize -= beg_range;
467                 }
468                 
469                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
470                         close_delete_and_die("RETR: %s", buf+4);
471
472         }
473
474
475         /*
476          * Retrieve file
477          */
478         if (chunked) {
479                 fgets(buf, sizeof(buf), dfp);
480                 filesize = strtol(buf, (char **) NULL, 16);
481         }
482 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
483         if (quiet_flag==FALSE)
484                 progressmeter(-1);
485 #endif
486         do {
487                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, ((chunked || got_clen) && (filesize < sizeof(buf)) ? filesize : sizeof(buf)), dfp)) > 0) {
488                         if (safe_fwrite(buf, 1, n, output) != n) {
489                                 bb_perror_msg_and_die("write error");
490                         }
491 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
492                         statbytes+=n;
493 #endif
494                         if (got_clen) {
495                                 filesize -= n;
496                         }
497                 }
498
499                 if (chunked) {
500                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
501                         safe_fgets(buf, sizeof(buf), dfp);
502                         filesize = strtol(buf, (char **) NULL, 16);
503                         if (filesize==0) {
504                                 chunked = 0; /* all done! */
505                         }
506                 }
507
508                 if (n == 0 && ferror(dfp)) {
509                         bb_perror_msg_and_die("network read error");
510                 }
511         } while (chunked);
512 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
513         if (quiet_flag==FALSE)
514                 progressmeter(1);
515 #endif
516         if (!proxy && target.is_ftp) {
517                 fclose(dfp);
518                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
519                         bb_error_msg_and_die("ftp error: %s", buf+4);
520                 ftpcmd("QUIT", NULL, sfp, buf);
521         }
522         exit(EXIT_SUCCESS);
523 }
524
525
526 void parse_url(char *url, struct host_info *h)
527 {
528         char *cp, *sp, *up;
529
530         if (strncmp(url, "http://", 7) == 0) {
531                 h->port = 80;
532                 h->host = url + 7;
533                 h->is_ftp = 0;
534         } else if (strncmp(url, "ftp://", 6) == 0) {
535                 h->port = 21;
536                 h->host = url + 6;
537                 h->is_ftp = 1;
538         } else
539                 bb_error_msg_and_die("not an http or ftp url: %s", url);
540
541         sp = strchr(h->host, '/');
542         if (sp != NULL) {
543                 *sp++ = '\0';
544                 h->path = sp;
545         } else
546                 h->path = bb_xstrdup("");
547
548         up = strrchr(h->host, '@');
549         if (up != NULL) {
550                 h->user = h->host;
551                 *up++ = '\0';
552                 h->host = up;
553         } else
554                 h->user = NULL;
555
556         cp = strchr(h->host, ':');
557         if (cp != NULL) {
558                 *cp++ = '\0';
559                 h->port = atoi(cp);
560         }
561
562 }
563
564
565 FILE *open_socket(char *host, int port)
566 {
567         int fd;
568         FILE *fp;
569         char port_str[10];
570
571         snprintf(port_str, sizeof(port_str), "%d", port);
572         fd=xconnect(host, port_str);
573
574         /*
575          * Get the server onto a stdio stream.
576          */
577         if ((fp = fdopen(fd, "r+")) == NULL)
578                 bb_perror_msg_and_die("fdopen()");
579
580         return fp;
581 }
582
583
584 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
585 {
586         char *s, *hdrval;
587         int c;
588
589         *istrunc = 0;
590
591         /* retrieve header line */
592         if (fgets(buf, bufsiz, fp) == NULL)
593                 return NULL;
594
595         /* see if we are at the end of the headers */
596         for (s = buf ; *s == '\r' ; ++s)
597                 ;
598         if (s[0] == '\n')
599                 return NULL;
600
601         /* convert the header name to lower case */
602         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
603                 *s = tolower(*s);
604
605         /* verify we are at the end of the header name */
606         if (*s != ':')
607                 bb_error_msg_and_die("bad header line: %s", buf);
608
609         /* locate the start of the header value */
610         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
611                 ;
612         hdrval = s;
613
614         /* locate the end of header */
615         while (*s != '\0' && *s != '\r' && *s != '\n')
616                 ++s;
617
618         /* end of header found */
619         if (*s != '\0') {
620                 *s = '\0';
621                 return hdrval;
622         }
623
624         /* Rats!  The buffer isn't big enough to hold the entire header value. */
625         while (c = getc(fp), c != EOF && c != '\n')
626                 ;
627         *istrunc = 1;
628         return hdrval;
629 }
630
631 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
632 {
633         char *p;
634         
635         if (s1) {
636                 if (!s2) s2="";
637                 fprintf(fp, "%s%s\r\n", s1, s2);
638                 fflush(fp);
639         }
640         
641         do {
642                 p = fgets(buf, 510, fp);
643                 if (!p)
644                         bb_perror_msg_and_die("fgets()");
645         } while (! isdigit(buf[0]) || buf[3] != ' ');
646         
647         return atoi(buf);
648 }
649
650 #ifdef CONFIG_FEATURE_WGET_STATUSBAR
651 /* Stuff below is from BSD rcp util.c, as added to openshh. 
652  * Original copyright notice is retained at the end of this file.
653  * 
654  */ 
655
656
657 static int
658 getttywidth(void)
659 {
660         struct winsize winsize;
661
662         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
663                 return (winsize.ws_col ? winsize.ws_col : 80);
664         else
665                 return (80);
666 }
667
668 static void
669 updateprogressmeter(int ignore)
670 {
671         int save_errno = errno;
672
673         progressmeter(0);
674         errno = save_errno;
675 }
676
677 static void
678 alarmtimer(int wait)
679 {
680         struct itimerval itv;
681
682         itv.it_value.tv_sec = wait;
683         itv.it_value.tv_usec = 0;
684         itv.it_interval = itv.it_value;
685         setitimer(ITIMER_REAL, &itv, NULL);
686 }
687
688
689 static void
690 progressmeter(int flag)
691 {
692         static const char prefixes[] = " KMGTP";
693         static struct timeval lastupdate;
694         static off_t lastsize, totalsize;
695         struct timeval now, td, wait;
696         off_t cursize, abbrevsize;
697         double elapsed;
698         int ratio, barlength, i, remaining;
699         char buf[256];
700
701         if (flag == -1) {
702                 (void) gettimeofday(&start, (struct timezone *) 0);
703                 lastupdate = start;
704                 lastsize = 0;
705                 totalsize = filesize; /* as filesize changes.. */
706         }
707
708         (void) gettimeofday(&now, (struct timezone *) 0);
709         cursize = statbytes;
710         if (totalsize != 0 && !chunked) {
711                 ratio = 100.0 * cursize / totalsize;
712                 ratio = MAX(ratio, 0);
713                 ratio = MIN(ratio, 100);
714         } else
715                 ratio = 100;
716
717         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
718
719         barlength = getttywidth() - 51;
720         if (barlength > 0) {
721                 i = barlength * ratio / 100;
722                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
723                          "|%.*s%*s|", i,
724                          "*****************************************************************************"
725                          "*****************************************************************************",
726                          barlength - i, "");
727         }
728         i = 0;
729         abbrevsize = cursize;
730         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
731                 i++;
732                 abbrevsize >>= 10;
733         }
734         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
735              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
736                  'B');
737
738         timersub(&now, &lastupdate, &wait);
739         if (cursize > lastsize) {
740                 lastupdate = now;
741                 lastsize = cursize;
742                 if (wait.tv_sec >= STALLTIME) {
743                         start.tv_sec += wait.tv_sec;
744                         start.tv_usec += wait.tv_usec;
745                 }
746                 wait.tv_sec = 0;
747         }
748         timersub(&now, &start, &td);
749         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
750
751         if (wait.tv_sec >= STALLTIME) {
752                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
753                          " - stalled -");
754         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
755                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
756                          "   --:-- ETA");
757         } else {
758                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
759                 i = remaining / 3600;
760                 if (i)
761                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
762                                  "%2d:", i);
763                 else
764                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
765                                  "   ");
766                 i = remaining % 3600;
767                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
768                          "%02d:%02d ETA", i / 60, i % 60);
769         }
770         write(fileno(stderr), buf, strlen(buf));
771
772         if (flag == -1) {
773                 struct sigaction sa;
774                 sa.sa_handler = updateprogressmeter;
775                 sigemptyset(&sa.sa_mask);
776                 sa.sa_flags = SA_RESTART;
777                 sigaction(SIGALRM, &sa, NULL);
778                 alarmtimer(1);
779         } else if (flag == 1) {
780                 alarmtimer(0);
781                 statbytes = 0;
782                 putc('\n', stderr);
783         }
784 }
785 #endif
786
787 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
788  * much of which was blatently stolen from openssh.  */
789  
790 /*-
791  * Copyright (c) 1992, 1993
792  *      The Regents of the University of California.  All rights reserved.
793  *
794  * Redistribution and use in source and binary forms, with or without
795  * modification, are permitted provided that the following conditions
796  * are met:
797  * 1. Redistributions of source code must retain the above copyright
798  *    notice, this list of conditions and the following disclaimer.
799  * 2. Redistributions in binary form must reproduce the above copyright
800  *    notice, this list of conditions and the following disclaimer in the
801  *    documentation and/or other materials provided with the distribution.
802  *
803  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change 
804  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> 
805  *
806  * 4. Neither the name of the University nor the names of its contributors
807  *    may be used to endorse or promote products derived from this software
808  *    without specific prior written permission.
809  *
810  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
811  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
812  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
813  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
814  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
815  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
816  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
817  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
818  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
819  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
820  * SUCH DAMAGE.
821  *
822  *      $Id: wget.c,v 1.57 2003/08/29 06:25:04 bug1 Exp $
823  */
824
825
826
827 /*
828 Local Variables:
829 c-file-style: "linux"
830 c-basic-offset: 4
831 tab-width: 4
832 End:
833 */