This depmod script will create a modules.dep file, just like the depmod
[oweals/busybox.git] / wget.c
1 /* vi: set sw=4 ts=4: */
2 /*
3  * wget - retrieve a file using HTTP or FTP
4  *
5  * Chip Rosenthal Covad Communications <chip@laserlink.net>
6  *
7  */
8
9 #include <stdio.h>
10 #include <errno.h>
11 #include <stdlib.h>
12 #include <unistd.h>
13 #include <ctype.h>
14 #include <string.h>
15 #include <unistd.h>
16 #include <signal.h>
17 #include <sys/ioctl.h>
18
19 #include <sys/time.h>
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <sys/socket.h>
23 #include <netinet/in.h>
24 #include <arpa/inet.h>
25 #include <netdb.h>
26
27 #ifndef _GNU_SOURCE
28 #define _GNU_SOURCE
29 #endif
30 #include <getopt.h>
31
32 #include "busybox.h"
33
34 /* Stupid libc5 doesn't define this... */
35 #ifndef timersub
36 #define timersub(a, b, result)                                                \
37   do {                                                                        \
38     (result)->tv_sec = (a)->tv_sec - (b)->tv_sec;                             \
39     (result)->tv_usec = (a)->tv_usec - (b)->tv_usec;                          \
40     if ((result)->tv_usec < 0) {                                              \
41       --(result)->tv_sec;                                                     \
42       (result)->tv_usec += 1000000;                                           \
43     }                                                                         \
44   } while (0)
45 #endif  
46
47 struct host_info {
48         char *host;
49         int port;
50         char *path;
51         int is_ftp;
52         char *user;
53 };
54
55 static void parse_url(char *url, struct host_info *h);
56 static FILE *open_socket(char *host, int port);
57 static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
58 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);
59
60 /* Globals (can be accessed from signal handlers */
61 static off_t filesize = 0;              /* content-length of the file */
62 static int chunked = 0;                 /* chunked transfer encoding */
63 #ifdef BB_FEATURE_WGET_STATUSBAR
64 static void progressmeter(int flag);
65 static char *curfile;                   /* Name of current file being transferred. */
66 static struct timeval start;    /* Time a transfer started. */
67 static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
68 /* For progressmeter() -- number of seconds before xfer considered "stalled" */
69 static const int STALLTIME = 5;
70 #endif
71                 
72 static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
73 {
74         if (output != stdout && do_continue==0) {
75                 fclose(output);
76                 unlink(fname_out);
77         }
78 }
79
80 /* Read NMEMB elements of SIZE bytes into PTR from STREAM.  Returns the
81  * number of elements read, and a short count if an eof or non-interrupt
82  * error is encountered.  */
83 static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
84 {
85         size_t ret = 0;
86
87         do {
88                 clearerr(stream);
89                 ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
90         } while (ret < nmemb && ferror(stream) && errno == EINTR);
91
92         return ret;
93 }
94
95 /* Write NMEMB elements of SIZE bytes from PTR to STREAM.  Returns the
96  * number of elements written, and a short count if an eof or non-interrupt
97  * error is encountered.  */
98 static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream)
99 {
100         size_t ret = 0;
101
102         do {
103                 clearerr(stream);
104                 ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
105         } while (ret < nmemb && ferror(stream) && errno == EINTR);
106
107         return ret;
108 }
109
110 /* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM.
111  * Returns S, or NULL if an eof or non-interrupt error is encountered.  */
112 static char *safe_fgets(char *s, int size, FILE *stream)
113 {
114         char *ret;
115
116         do {
117                 clearerr(stream);
118                 ret = fgets(s, size, stream);
119         } while (ret == NULL && ferror(stream) && errno == EINTR);
120
121         return ret;
122 }
123
124 #define close_delete_and_die(s...) { \
125         close_and_delete_outfile(output, fname_out, do_continue); \
126         error_msg_and_die(s); }
127
128
129 #ifdef BB_FEATURE_WGET_AUTHENTICATION
130 /*
131  *  Base64-encode character string
132  *  oops... isn't something similar in uuencode.c?
133  *  It would be better to use already existing code
134  */
135 char *base64enc(char *p, char *buf, int len) {
136
137         char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
138                     "0123456789+/";
139                 char *s = buf;
140
141         while(*p) {
142                                 if (s >= buf+len-4)
143                                         error_msg_and_die("buffer overflow");
144                 *(s++) = al[(*p >> 2) & 0x3F];
145                 *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
146                 *s = *(s+1) = '=';
147                 *(s+2) = 0;
148                 if (! *(++p)) break;
149                 *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
150                 if (! *(++p)) break;
151                 *(s++) = al[*(p++) & 0x3F];
152         }
153
154                 return buf;
155 }
156 #endif
157
158 int wget_main(int argc, char **argv)
159 {
160         int n, try=5, status;
161         int port;
162         char *proxy;
163         char *dir_prefix=NULL;
164         char *s, buf[512];
165         struct stat sbuf;
166         char extra_headers[1024];
167         char *extra_headers_ptr = extra_headers;
168         int extra_headers_left = sizeof(extra_headers);
169         int which_long_opt = 0, option_index = -1;
170         struct host_info server, target;
171
172         FILE *sfp = NULL;                       /* socket to web/ftp server                     */
173         FILE *dfp = NULL;                       /* socket to ftp server (data)          */
174         char *fname_out = NULL;         /* where to direct output (-O)          */
175         int do_continue = 0;            /* continue a prev transfer (-c)        */
176         long beg_range = 0L;            /*   range at which continue begins     */
177         int got_clen = 0;                       /* got content-length: from server      */
178         FILE *output;                           /* socket to web server                         */
179         int quiet_flag = FALSE;         /* Be verry, verry quiet...                     */
180
181 #define LONG_HEADER     1
182         struct option long_options[] = {
183                 { "continue",           0, NULL, 'c' },
184                 { "quiet",              0, NULL, 'q' },
185                 { "output-document",    1, NULL, 'O' },
186                 { "header",             1, &which_long_opt, LONG_HEADER },
187                 { 0,                    0, 0, 0 }
188         };
189         /*
190          * Crack command line.
191          */
192         while ((n = getopt_long(argc, argv, "cqO:P:", long_options, &option_index)) != EOF) {
193                 switch (n) {
194                 case 'c':
195                         ++do_continue;
196                         break;
197                 case 'P':
198                         dir_prefix = optarg;
199                         break;
200                 case 'q':
201                         quiet_flag = TRUE;
202                         break;
203                 case 'O':
204                         /* can't set fname_out to NULL if outputting to stdout, because
205                          * this gets interpreted as the auto-gen output filename
206                          * case below  - tausq@debian.org
207                          */
208                         fname_out = optarg;
209                         break;
210                 case 0:
211                         switch (which_long_opt) {
212                                 case LONG_HEADER: {
213                                         int arglen = strlen(optarg);
214                                         if(extra_headers_left - arglen - 2 <= 0)
215                                                 error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
216                                         strcpy(extra_headers_ptr, optarg);
217                                         extra_headers_ptr += arglen;
218                                         extra_headers_left -= ( arglen + 2 );
219                                         *extra_headers_ptr++ = '\r';
220                                         *extra_headers_ptr++ = '\n';
221                                         *(extra_headers_ptr + 1) = 0;
222                                         break;
223                                 }
224                         }
225                         break;
226                 default:
227                         show_usage();
228                 }
229         }
230
231         if (argc - optind != 1)
232                         show_usage();
233
234         parse_url(argv[optind], &target);
235         server.host = target.host;
236         server.port = target.port;
237
238         /*
239          * Use the proxy if necessary.
240          */
241         proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
242         if (proxy)
243                 parse_url(xstrdup(proxy), &server);
244         
245         /* Guess an output filename */
246         if (!fname_out) {
247                 fname_out = 
248 #ifdef BB_FEATURE_WGET_STATUSBAR
249                         curfile = 
250 #endif
251                         get_last_path_component(target.path);
252                 if (fname_out==NULL || strlen(fname_out)<1) {
253                         fname_out = 
254 #ifdef BB_FEATURE_WGET_STATUSBAR
255                                 curfile = 
256 #endif
257                                 "index.html";
258                 }
259                 if (dir_prefix != NULL)
260                         fname_out = concat_path_file(dir_prefix, fname_out);
261 #ifdef BB_FEATURE_WGET_STATUSBAR
262         } else {
263                 curfile = get_last_path_component(fname_out);
264 #endif
265         }
266         if (do_continue && !fname_out)
267                 error_msg_and_die("cannot specify continue (-c) without a filename (-O)");
268
269
270         /*
271          * Open the output file stream.
272          */
273         if (strcmp(fname_out, "-") == 0) {
274                 output = stdout;
275                 quiet_flag = TRUE;
276         } else {
277                 output = xfopen(fname_out, (do_continue ? "a" : "w"));
278         }
279
280         /*
281          * Determine where to start transfer.
282          */
283         if (do_continue) {
284                 if (fstat(fileno(output), &sbuf) < 0)
285                         perror_msg_and_die("fstat()");
286                 if (sbuf.st_size > 0)
287                         beg_range = sbuf.st_size;
288                 else
289                         do_continue = 0;
290         }
291
292         if (proxy || !target.is_ftp) {
293                 /*
294                  *  HTTP session
295                  */
296                 do {
297                         if (! --try)
298                                 close_delete_and_die("too many redirections");
299
300                         /*
301                          * Open socket to http server
302                          */
303                         if (sfp) fclose(sfp);
304                         sfp = open_socket(server.host, server.port);
305                         
306                         /*
307                          * Send HTTP request.
308                          */
309                         if (proxy) {
310                                 fprintf(sfp, "GET %stp://%s:%d/%s HTTP/1.1\r\n",
311                                         target.is_ftp ? "f" : "ht", target.host,
312                                         target.port, target.path);
313                         } else {
314                                 fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
315                         }
316
317                         fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);
318
319 #ifdef BB_FEATURE_WGET_AUTHENTICATION
320                         if (target.user) {
321                                 fprintf(sfp, "Authorization: Basic %s\r\n",
322                                         base64enc(target.user, buf, sizeof(buf)));
323                         }
324                         if (proxy && server.user) {
325                                 fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
326                                         base64enc(server.user, buf, sizeof(buf)));
327                         }
328 #endif
329
330                         if (do_continue)
331                                 fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
332                         if(extra_headers_left < sizeof(extra_headers))
333                                 fputs(extra_headers,sfp);
334                         fprintf(sfp,"Connection: close\r\n\r\n");
335
336                         /*
337                         * Retrieve HTTP response line and check for "200" status code.
338                         */
339 read_response:          if (fgets(buf, sizeof(buf), sfp) == NULL)
340                                 close_delete_and_die("no response from server");
341                                 
342                         for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
343                         ;
344                         for ( ; isspace(*s) ; ++s)
345                         ;
346                         switch (status = atoi(s)) {
347                                 case 0:
348                                 case 100:
349                                         while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
350                                         goto read_response;
351                                 case 200:
352                                         if (do_continue && output != stdout)
353                                                 output = freopen(fname_out, "w", output);
354                                         do_continue = 0;
355                                         break;
356                                 case 300:       /* redirection */
357                                 case 301:
358                                 case 302:
359                                 case 303:
360                                         break;
361                                 case 206:
362                                         if (do_continue)
363                                                 break;
364                                         /*FALLTHRU*/
365                                 default:
366                                         chomp(buf);
367                                         close_delete_and_die("server returned error %d: %s", atoi(s), buf);
368                         }
369                 
370                         /*
371                          * Retrieve HTTP headers.
372                          */
373                         while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
374                                 if (strcasecmp(buf, "content-length") == 0) {
375                                         filesize = atol(s);
376                                         got_clen = 1;
377                                         continue;
378                                 }
379                                 if (strcasecmp(buf, "transfer-encoding") == 0) {
380                                         if (strcasecmp(s, "chunked") == 0) {
381                                                 chunked = got_clen = 1;
382                                         } else {
383                                         close_delete_and_die("server wants to do %s transfer encoding", s);
384                                         }
385                                 }
386                                 if (strcasecmp(buf, "location") == 0) {
387                                         if (s[0] == '/')
388                                                 target.path = xstrdup(s+1);
389                                         else {
390                                                 parse_url(xstrdup(s), &target);
391                                                 if (!proxy) {
392                                                         server.host = target.host;
393                                                         server.port = target.port;
394                                                 }
395                                         }
396                                 }
397                         }
398                 } while(status >= 300);
399                 
400                 dfp = sfp;
401         }
402         else
403         {
404                 /*
405                  *  FTP session
406                  */
407                 if (! target.user)
408                         target.user = xstrdup("anonymous:busybox@");
409
410                 sfp = open_socket(server.host, server.port);
411                 if (ftpcmd(NULL, NULL, sfp, buf) != 220)
412                         close_delete_and_die("%s", buf+4);
413
414                 /* 
415                  * Splitting username:password pair,
416                  * trying to log in
417                  */
418                 s = strchr(target.user, ':');
419                 if (s)
420                         *(s++) = '\0';
421                 switch(ftpcmd("USER ", target.user, sfp, buf)) {
422                         case 230:
423                                 break;
424                         case 331:
425                                 if (ftpcmd("PASS ", s, sfp, buf) == 230)
426                                         break;
427                                 /* FALLTHRU (failed login) */
428                         default:
429                                 close_delete_and_die("ftp login: %s", buf+4);
430                 }
431                 
432                 ftpcmd("CDUP", NULL, sfp, buf);
433                 ftpcmd("TYPE I", NULL, sfp, buf);
434                 
435                 /*
436                  * Querying file size
437                  */
438                 if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
439                         filesize = atol(buf+4);
440                         got_clen = 1;
441                 }
442                 
443                 /*
444                  * Entering passive mode
445                  */
446                 if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
447                         close_delete_and_die("PASV: %s", buf+4);
448                 s = strrchr(buf, ',');
449                 *s = 0;
450                 port = atoi(s+1);
451                 s = strrchr(buf, ',');
452                 port += atoi(s+1) * 256;
453                 dfp = open_socket(server.host, port);
454
455                 if (do_continue) {
456                         sprintf(buf, "REST %ld", beg_range);
457                         if (ftpcmd(buf, NULL, sfp, buf) != 350) {
458                                 if (output != stdout)
459                                         output = freopen(fname_out, "w", output);
460                                 do_continue = 0;
461                         } else
462                                 filesize -= beg_range;
463                 }
464                 
465                 if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
466                         close_delete_and_die("RETR: %s", buf+4);
467
468         }
469
470
471         /*
472          * Retrieve file
473          */
474         if (chunked) {
475                 fgets(buf, sizeof(buf), dfp);
476                 filesize = strtol(buf, (char **) NULL, 16);
477         }
478 #ifdef BB_FEATURE_WGET_STATUSBAR
479         if (quiet_flag==FALSE)
480                 progressmeter(-1);
481 #endif
482         do {
483                 while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, chunked ? (filesize > sizeof(buf) ? sizeof(buf) : filesize) : sizeof(buf), dfp)) > 0) {
484                 safe_fwrite(buf, 1, n, output);
485 #ifdef BB_FEATURE_WGET_STATUSBAR
486                 statbytes+=n;
487 #endif
488                 if (got_clen)
489                         filesize -= n;
490         }
491
492                 if (chunked) {
493                         safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
494                         safe_fgets(buf, sizeof(buf), dfp);
495                         filesize = strtol(buf, (char **) NULL, 16);
496                         if (filesize==0) chunked = 0; /* all done! */
497                 }
498
499         if (n == 0 && ferror(dfp))
500                 perror_msg_and_die("network read error");
501         } while (chunked);
502 #ifdef BB_FEATURE_WGET_STATUSBAR
503         if (quiet_flag==FALSE)
504                 progressmeter(1);
505 #endif
506         if (!proxy && target.is_ftp) {
507                 fclose(dfp);
508                 if (ftpcmd(NULL, NULL, sfp, buf) != 226)
509                         error_msg_and_die("ftp error: %s", buf+4);
510                 ftpcmd("QUIT", NULL, sfp, buf);
511         }
512         exit(EXIT_SUCCESS);
513 }
514
515
516 void parse_url(char *url, struct host_info *h)
517 {
518         char *cp, *sp, *up;
519
520         if (strncmp(url, "http://", 7) == 0) {
521                 h->port = 80;
522                 h->host = url + 7;
523                 h->is_ftp = 0;
524         } else if (strncmp(url, "ftp://", 6) == 0) {
525                 h->port = 21;
526                 h->host = url + 6;
527                 h->is_ftp = 1;
528         } else
529                 error_msg_and_die("not an http or ftp url: %s", url);
530
531         sp = strchr(h->host, '/');
532         if (sp != NULL) {
533                 *sp++ = '\0';
534                 h->path = sp;
535         } else
536                 h->path = "";
537
538         up = strrchr(h->host, '@');
539         if (up != NULL) {
540                 h->user = h->host;
541                 *up++ = '\0';
542                 h->host = up;
543         } else
544                 h->user = NULL;
545
546         cp = strchr(h->host, ':');
547         if (cp != NULL) {
548                 *cp++ = '\0';
549                 h->port = atoi(cp);
550         }
551
552 }
553
554
555 FILE *open_socket(char *host, int port)
556 {
557         struct sockaddr_in s_in;
558         struct hostent *hp;
559         int fd;
560         FILE *fp;
561
562         memset(&s_in, 0, sizeof(s_in));
563         s_in.sin_family = AF_INET;
564         hp = xgethostbyname(host);
565         memcpy(&s_in.sin_addr, hp->h_addr_list[0], hp->h_length);
566         s_in.sin_port = htons(port);
567
568         /*
569          * Get the server onto a stdio stream.
570          */
571         if ((fd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
572                 perror_msg_and_die("socket()");
573         if (connect(fd, (struct sockaddr *) &s_in, sizeof(s_in)) < 0)
574                 perror_msg_and_die("connect(%s)", host);
575         if ((fp = fdopen(fd, "r+")) == NULL)
576                 perror_msg_and_die("fdopen()");
577
578         return fp;
579 }
580
581
582 char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
583 {
584         char *s, *hdrval;
585         int c;
586
587         *istrunc = 0;
588
589         /* retrieve header line */
590         if (fgets(buf, bufsiz, fp) == NULL)
591                 return NULL;
592
593         /* see if we are at the end of the headers */
594         for (s = buf ; *s == '\r' ; ++s)
595                 ;
596         if (s[0] == '\n')
597                 return NULL;
598
599         /* convert the header name to lower case */
600         for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
601                 *s = tolower(*s);
602
603         /* verify we are at the end of the header name */
604         if (*s != ':')
605                 error_msg_and_die("bad header line: %s", buf);
606
607         /* locate the start of the header value */
608         for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
609                 ;
610         hdrval = s;
611
612         /* locate the end of header */
613         while (*s != '\0' && *s != '\r' && *s != '\n')
614                 ++s;
615
616         /* end of header found */
617         if (*s != '\0') {
618                 *s = '\0';
619                 return hdrval;
620         }
621
622         /* Rats!  The buffer isn't big enough to hold the entire header value. */
623         while (c = getc(fp), c != EOF && c != '\n')
624                 ;
625         *istrunc = 1;
626         return hdrval;
627 }
628
629 static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
630 {
631         char *p;
632         
633         if (s1) {
634                 if (!s2) s2="";
635                 fprintf(fp, "%s%s\n", s1, s2);
636                 fflush(fp);
637         }
638         
639         do {
640                 p = fgets(buf, 510, fp);
641                 if (!p)
642                         perror_msg_and_die("fgets()");
643         } while (! isdigit(buf[0]) || buf[3] != ' ');
644         
645         return atoi(buf);
646 }
647
648 #ifdef BB_FEATURE_WGET_STATUSBAR
649 /* Stuff below is from BSD rcp util.c, as added to openshh. 
650  * Original copyright notice is retained at the end of this file.
651  * 
652  */ 
653
654
655 static int
656 getttywidth(void)
657 {
658         struct winsize winsize;
659
660         if (ioctl(fileno(stdout), TIOCGWINSZ, &winsize) != -1)
661                 return (winsize.ws_col ? winsize.ws_col : 80);
662         else
663                 return (80);
664 }
665
666 static void
667 updateprogressmeter(int ignore)
668 {
669         int save_errno = errno;
670
671         progressmeter(0);
672         errno = save_errno;
673 }
674
675 static void
676 alarmtimer(int wait)
677 {
678         struct itimerval itv;
679
680         itv.it_value.tv_sec = wait;
681         itv.it_value.tv_usec = 0;
682         itv.it_interval = itv.it_value;
683         setitimer(ITIMER_REAL, &itv, NULL);
684 }
685
686
687 static void
688 progressmeter(int flag)
689 {
690         static const char prefixes[] = " KMGTP";
691         static struct timeval lastupdate;
692         static off_t lastsize, totalsize;
693         struct timeval now, td, wait;
694         off_t cursize, abbrevsize;
695         double elapsed;
696         int ratio, barlength, i, remaining;
697         char buf[256];
698
699         if (flag == -1) {
700                 (void) gettimeofday(&start, (struct timezone *) 0);
701                 lastupdate = start;
702                 lastsize = 0;
703                 totalsize = filesize; /* as filesize changes.. */
704         }
705
706         (void) gettimeofday(&now, (struct timezone *) 0);
707         cursize = statbytes;
708         if (totalsize != 0 && !chunked) {
709                 ratio = 100.0 * cursize / totalsize;
710                 ratio = MAX(ratio, 0);
711                 ratio = MIN(ratio, 100);
712         } else
713                 ratio = 100;
714
715         snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);
716
717         barlength = getttywidth() - 51;
718         if (barlength > 0) {
719                 i = barlength * ratio / 100;
720                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
721                          "|%.*s%*s|", i,
722                          "*****************************************************************************"
723                          "*****************************************************************************",
724                          barlength - i, "");
725         }
726         i = 0;
727         abbrevsize = cursize;
728         while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
729                 i++;
730                 abbrevsize >>= 10;
731         }
732         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
733              (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
734                  'B');
735
736         timersub(&now, &lastupdate, &wait);
737         if (cursize > lastsize) {
738                 lastupdate = now;
739                 lastsize = cursize;
740                 if (wait.tv_sec >= STALLTIME) {
741                         start.tv_sec += wait.tv_sec;
742                         start.tv_usec += wait.tv_usec;
743                 }
744                 wait.tv_sec = 0;
745         }
746         timersub(&now, &start, &td);
747         elapsed = td.tv_sec + (td.tv_usec / 1000000.0);
748
749         if (wait.tv_sec >= STALLTIME) {
750                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
751                          " - stalled -");
752         } else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
753                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
754                          "   --:-- ETA");
755         } else {
756                 remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
757                 i = remaining / 3600;
758                 if (i)
759                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
760                                  "%2d:", i);
761                 else
762                         snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
763                                  "   ");
764                 i = remaining % 3600;
765                 snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
766                          "%02d:%02d ETA", i / 60, i % 60);
767         }
768         write(fileno(stderr), buf, strlen(buf));
769
770         if (flag == -1) {
771                 struct sigaction sa;
772                 sa.sa_handler = updateprogressmeter;
773                 sigemptyset(&sa.sa_mask);
774                 sa.sa_flags = SA_RESTART;
775                 sigaction(SIGALRM, &sa, NULL);
776                 alarmtimer(1);
777         } else if (flag == 1) {
778                 alarmtimer(0);
779                 statbytes = 0;
780                 putc('\n', stderr);
781         }
782 }
783 #endif
784
785 /* Original copyright notice which applies to the BB_FEATURE_WGET_STATUSBAR stuff,
786  * much of which was blatently stolen from openssh.  */
787  
788 /*-
789  * Copyright (c) 1992, 1993
790  *      The Regents of the University of California.  All rights reserved.
791  *
792  * Redistribution and use in source and binary forms, with or without
793  * modification, are permitted provided that the following conditions
794  * are met:
795  * 1. Redistributions of source code must retain the above copyright
796  *    notice, this list of conditions and the following disclaimer.
797  * 2. Redistributions in binary form must reproduce the above copyright
798  *    notice, this list of conditions and the following disclaimer in the
799  *    documentation and/or other materials provided with the distribution.
800  *
801  * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change 
802  *              ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> 
803  *
804  * 4. Neither the name of the University nor the names of its contributors
805  *    may be used to endorse or promote products derived from this software
806  *    without specific prior written permission.
807  *
808  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
809  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
810  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
811  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
812  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
813  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
814  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
815  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
816  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
817  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
818  * SUCH DAMAGE.
819  *
820  *      $Id: wget.c,v 1.45 2001/07/19 22:28:01 andersen Exp $
821  */
822
823
824
825 /*
826 Local Variables:
827 c-file-style: "linux"
828 c-basic-offset: 4
829 tab-width: 4
830 End:
831 */
832
833
834