aboutsummaryrefslogtreecommitdiff
path: root/networking/wget.c
blob: 9f5dbaf2130bab784bf5076af6871bf06eb5565d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
/* vi: set sw=4 ts=4: */
/*
 * wget - retrieve a file using HTTP or FTP
 *
 * Chip Rosenthal Covad Communications <chip@laserlink.net>
 *
 */

#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <sys/ioctl.h>

#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>

#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <getopt.h>

#include "busybox.h"

struct host_info {
	char *host;
	int port;
	char *path;
	int is_ftp;
	char *user;
};

static void parse_url(char *url, struct host_info *h);
static FILE *open_socket(struct sockaddr_in *s_in);
static char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc);
static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf);

/* Globals (can be accessed from signal handlers */
static off_t filesize = 0;		/* content-length of the file */
static int chunked = 0;			/* chunked transfer encoding */
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
static void progressmeter(int flag);
static char *curfile;			/* Name of current file being transferred. */
static struct timeval start;	/* Time a transfer started. */
static volatile unsigned long statbytes = 0; /* Number of bytes transferred so far. */
/* For progressmeter() -- number of seconds before xfer considered "stalled" */
static const int STALLTIME = 5;
#endif
		
static void close_and_delete_outfile(FILE* output, char *fname_out, int do_continue)
{
	if (output != stdout && do_continue==0) {
		fclose(output);
		unlink(fname_out);
	}
}

/* Read NMEMB elements of SIZE bytes into PTR from STREAM.  Returns the
 * number of elements read, and a short count if an eof or non-interrupt
 * error is encountered.  */
static size_t safe_fread(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
	size_t ret = 0;

	do {
		clearerr(stream);
		ret += fread((char *)ptr + (ret * size), size, nmemb - ret, stream);
	} while (ret < nmemb && ferror(stream) && errno == EINTR);

	return ret;
}

/* Write NMEMB elements of SIZE bytes from PTR to STREAM.  Returns the
 * number of elements written, and a short count if an eof or non-interrupt
 * error is encountered.  */
static size_t safe_fwrite(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
	size_t ret = 0;

	do {
		clearerr(stream);
		ret += fwrite((char *)ptr + (ret * size), size, nmemb - ret, stream);
	} while (ret < nmemb && ferror(stream) && errno == EINTR);

	return ret;
}

/* Read a line or SIZE - 1 bytes into S, whichever is less, from STREAM.
 * Returns S, or NULL if an eof or non-interrupt error is encountered.  */
static char *safe_fgets(char *s, int size, FILE *stream)
{
	char *ret;

	do {
		clearerr(stream);
		ret = fgets(s, size, stream);
	} while (ret == NULL && ferror(stream) && errno == EINTR);

	return ret;
}

#define close_delete_and_die(s...) { \
	close_and_delete_outfile(output, fname_out, do_continue); \
	bb_error_msg_and_die(s); }


#ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
/*
 *  Base64-encode character string
 *  oops... isn't something similar in uuencode.c?
 *  It would be better to use already existing code
 */
char *base64enc(char *p, char *buf, int len) {

        char al[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"
                    "0123456789+/";
		char *s = buf;

        while(*p) {
				if (s >= buf+len-4)
					bb_error_msg_and_die("buffer overflow");
                *(s++) = al[(*p >> 2) & 0x3F];
                *(s++) = al[((*p << 4) & 0x30) | ((*(p+1) >> 4) & 0x0F)];
                *s = *(s+1) = '=';
                *(s+2) = 0;
                if (! *(++p)) break;
                *(s++) = al[((*p << 2) & 0x3C) | ((*(p+1) >> 6) & 0x03)];
                if (! *(++p)) break;
                *(s++) = al[*(p++) & 0x3F];
        }

		return buf;
}
#endif

#define WGET_OPT_CONTINUE	1
#define WGET_OPT_QUIET	2
#define WGET_OPT_PASSIVE	4
#define WGET_OPT_OUTNAME	8
#define WGET_OPT_HEADER	16
#define WGET_OPT_PREFIX	32
#define WGET_OPT_PROXY	64

static const struct option wget_long_options[] = {
	{ "continue",        0, NULL, 'c' },
	{ "quiet",           0, NULL, 'q' },
	{ "passive-ftp",     0, NULL, 139 },
	{ "output-document", 1, NULL, 'O' },
	{ "header",	         1, NULL, 131 },
	{ "directory-prefix",1, NULL, 'P' },
	{ "proxy",           1, NULL, 'Y' },
	{ 0,                 0, 0, 0 }
};

int wget_main(int argc, char **argv)
{
	int n, try=5, status;
	unsigned long opt;
	int port;
	char *proxy = 0;
	char *dir_prefix=NULL;
	char *s, buf[512];
	struct stat sbuf;
	char extra_headers[1024];
	char *extra_headers_ptr = extra_headers;
	int extra_headers_left = sizeof(extra_headers);
	struct host_info server, target;
	struct sockaddr_in s_in;
	llist_t *headers_llist = NULL;

	FILE *sfp = NULL;			/* socket to web/ftp server			*/
	FILE *dfp = NULL;			/* socket to ftp server (data)		*/
	char *fname_out = NULL;		/* where to direct output (-O)		*/
	int do_continue = 0;		/* continue a prev transfer (-c)	*/
	long beg_range = 0L;		/*   range at which continue begins	*/
	int got_clen = 0;			/* got content-length: from server	*/
	FILE *output;				/* socket to web server				*/
	int quiet_flag = FALSE;		/* Be verry, verry quiet...			*/
	int noproxy = 0;            /* Use proxies if env vars are set  */
	char *proxy_flag = "on";	/* Use proxies if env vars are set  */

	/*
	 * Crack command line.
	 */
	bb_opt_complementaly = "\203*";
	bb_applet_long_options = wget_long_options;
	opt = bb_getopt_ulflags(argc, argv, "cq\213O:\203:P:Y:", &fname_out, &headers_llist, &dir_prefix, &proxy_flag);
	if (opt & WGET_OPT_CONTINUE) {
		++do_continue;
	}
	if (opt & WGET_OPT_QUIET) {
		quiet_flag = TRUE;
	}
	if (strcmp(proxy_flag, "on") == 0) {
		/* Use the proxy if necessary. */
		proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
		if (proxy)
			parse_url(bb_xstrdup(proxy), &server);
	}
	if (opt & WGET_OPT_HEADER) {
		while (headers_llist) {
			int arglen = strlen(headers_llist->data);
			if (extra_headers_left - arglen - 2 <= 0)
				bb_error_msg_and_die("extra_headers buffer too small(need %i)", extra_headers_left - arglen);
			strcpy(extra_headers_ptr, headers_llist->data);
			extra_headers_ptr += arglen;
			extra_headers_left -= ( arglen + 2 );
			*extra_headers_ptr++ = '\r';
			*extra_headers_ptr++ = '\n';
			*(extra_headers_ptr + 1) = 0;
			headers_llist = headers_llist->link;
		}
	}
	if (argc - optind != 1)
			bb_show_usage();

	parse_url(argv[optind], &target);
	server.host = target.host;
	server.port = target.port;

	/*
	 * Use the proxy if necessary.
	 */
	if (!noproxy) {
		proxy = getenv(target.is_ftp ? "ftp_proxy" : "http_proxy");
		if (proxy)
			parse_url(bb_xstrdup(proxy), &server);
	}
	
	/* Guess an output filename */
	if (!fname_out) {
		fname_out = 
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
			curfile = 
#endif
			bb_get_last_path_component(target.path);
		if (fname_out==NULL || strlen(fname_out)<1) {
			fname_out = 
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
				curfile = 
#endif
				"index.html";
		}
		if (dir_prefix != NULL)
			fname_out = concat_path_file(dir_prefix, fname_out);
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
	} else {
		curfile = bb_get_last_path_component(fname_out);
#endif
	}
	if (do_continue && !fname_out)
		bb_error_msg_and_die("cannot specify continue (-c) without a filename (-O)");


	/*
	 * Open the output file stream.
	 */
	if (strcmp(fname_out, "-") == 0) {
		output = stdout;
		quiet_flag = TRUE;
	} else {
		output = bb_xfopen(fname_out, (do_continue ? "a" : "w"));
	}

	/*
	 * Determine where to start transfer.
	 */
	if (do_continue) {
		if (fstat(fileno(output), &sbuf) < 0)
			bb_perror_msg_and_die("fstat()");
		if (sbuf.st_size > 0)
			beg_range = sbuf.st_size;
		else
			do_continue = 0;
	}

	/* We want to do exactly _one_ DNS lookup, since some
	 * sites (i.e. ftp.us.debian.org) use round-robin DNS
	 * and we want to connect to only one IP... */
	bb_lookup_host(&s_in, server.host);
	s_in.sin_port = server.port;
	if (quiet_flag==FALSE) {
		fprintf(stdout, "Connecting to %s[%s]:%d\n",
				server.host, inet_ntoa(s_in.sin_addr), ntohs(server.port));
	}

	if (proxy || !target.is_ftp) {
		/*
		 *  HTTP session
		 */
		do {
			got_clen = chunked = 0;

			if (! --try)
				close_delete_and_die("too many redirections");

			/*
			 * Open socket to http server
			 */
			if (sfp) fclose(sfp);
			sfp = open_socket(&s_in);
			
			/*
			 * Send HTTP request.
			 */
			if (proxy) {
				const char *format = "GET %stp://%s:%d/%s HTTP/1.1\r\n";
#ifdef CONFIG_FEATURE_WGET_IP6_LITERAL
				if (strchr (target.host, ':'))
					format = "GET %stp://[%s]:%d/%s HTTP/1.1\r\n";
#endif
				fprintf(sfp, format,
					target.is_ftp ? "f" : "ht", target.host,
					target.port, target.path);
			} else {
				fprintf(sfp, "GET /%s HTTP/1.1\r\n", target.path);
			}

			fprintf(sfp, "Host: %s\r\nUser-Agent: Wget\r\n", target.host);

#ifdef CONFIG_FEATURE_WGET_AUTHENTICATION
			if (target.user) {
				fprintf(sfp, "Authorization: Basic %s\r\n",
					base64enc(target.user, buf, sizeof(buf)));
			}
			if (proxy && server.user) {
				fprintf(sfp, "Proxy-Authorization: Basic %s\r\n",
					base64enc(server.user, buf, sizeof(buf)));
			}
#endif

			if (do_continue)
				fprintf(sfp, "Range: bytes=%ld-\r\n", beg_range);
			if(extra_headers_left < sizeof(extra_headers))
				fputs(extra_headers,sfp);
			fprintf(sfp,"Connection: close\r\n\r\n");

			/*
		 	* Retrieve HTTP response line and check for "200" status code.
		 	*/
read_response:
			if (fgets(buf, sizeof(buf), sfp) == NULL)
				close_delete_and_die("no response from server");
				
			for (s = buf ; *s != '\0' && !isspace(*s) ; ++s)
			;
			for ( ; isspace(*s) ; ++s)
			;
			switch (status = atoi(s)) {
				case 0:
				case 100:
					while (gethdr(buf, sizeof(buf), sfp, &n) != NULL);
					goto read_response;
				case 200:
					if (do_continue && output != stdout)
						output = freopen(fname_out, "w", output);
					do_continue = 0;
					break;
				case 300:	/* redirection */
				case 301:
				case 302:
				case 303:
					break;
				case 206:
					if (do_continue)
						break;
					/*FALLTHRU*/
				default:
					chomp(buf);
					close_delete_and_die("server returned error %d: %s", atoi(s), buf);
			}
		
			/*
			 * Retrieve HTTP headers.
			 */
			while ((s = gethdr(buf, sizeof(buf), sfp, &n)) != NULL) {
				if (strcasecmp(buf, "content-length") == 0) {
					filesize = atol(s);
					got_clen = 1;
					continue;
				}
				if (strcasecmp(buf, "transfer-encoding") == 0) {
					if (strcasecmp(s, "chunked") == 0) {
						chunked = got_clen = 1;
					} else {
					close_delete_and_die("server wants to do %s transfer encoding", s);
					}
				}
				if (strcasecmp(buf, "location") == 0) {
					if (s[0] == '/')
						target.path = bb_xstrdup(s+1);
					else {
						parse_url(bb_xstrdup(s), &target);
						if (!proxy) {
							server.host = target.host;
							server.port = target.port;
						}
					}
				}
			}
		} while(status >= 300);
		
		dfp = sfp;
	}
	else
	{
		/*
		 *  FTP session
		 */
		if (! target.user)
			target.user = bb_xstrdup("anonymous:busybox@");

		sfp = open_socket(&s_in);
		if (ftpcmd(NULL, NULL, sfp, buf) != 220)
			close_delete_and_die("%s", buf+4);

		/* 
		 * Splitting username:password pair,
		 * trying to log in
		 */
		s = strchr(target.user, ':');
		if (s)
			*(s++) = '\0';
		switch(ftpcmd("USER ", target.user, sfp, buf)) {
			case 230:
				break;
			case 331:
				if (ftpcmd("PASS ", s, sfp, buf) == 230)
					break;
				/* FALLTHRU (failed login) */
			default:
				close_delete_and_die("ftp login: %s", buf+4);
		}
		
		ftpcmd("CDUP", NULL, sfp, buf);
		ftpcmd("TYPE I", NULL, sfp, buf);
		
		/*
		 * Querying file size
		 */
		if (ftpcmd("SIZE /", target.path, sfp, buf) == 213) {
			filesize = atol(buf+4);
			got_clen = 1;
		}
		
		/*
		 * Entering passive mode
		 */
		if (ftpcmd("PASV", NULL, sfp, buf) !=  227)
			close_delete_and_die("PASV: %s", buf+4);
		s = strrchr(buf, ',');
		*s = 0;
		port = atoi(s+1);
		s = strrchr(buf, ',');
		port += atoi(s+1) * 256;
		s_in.sin_port = htons(port);
		dfp = open_socket(&s_in);

		if (do_continue) {
			sprintf(buf, "REST %ld", beg_range);
			if (ftpcmd(buf, NULL, sfp, buf) != 350) {
				if (output != stdout)
					output = freopen(fname_out, "w", output);
				do_continue = 0;
			} else
				filesize -= beg_range;
		}
		
		if (ftpcmd("RETR /", target.path, sfp, buf) > 150)
			close_delete_and_die("RETR: %s", buf+4);

	}


	/*
	 * Retrieve file
	 */
	if (chunked) {
		fgets(buf, sizeof(buf), dfp);
		filesize = strtol(buf, (char **) NULL, 16);
	}
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
	if (quiet_flag==FALSE)
		progressmeter(-1);
#endif
	do {
		while ((filesize > 0 || !got_clen) && (n = safe_fread(buf, 1, ((chunked || got_clen) && (filesize < sizeof(buf)) ? filesize : sizeof(buf)), dfp)) > 0) {
			if (safe_fwrite(buf, 1, n, output) != n) {
				bb_perror_msg_and_die("write error");
			}
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
			statbytes+=n;
#endif
			if (got_clen) {
				filesize -= n;
			}
		}

		if (chunked) {
			safe_fgets(buf, sizeof(buf), dfp); /* This is a newline */
			safe_fgets(buf, sizeof(buf), dfp);
			filesize = strtol(buf, (char **) NULL, 16);
			if (filesize==0) {
				chunked = 0; /* all done! */
			}
		}

		if (n == 0 && ferror(dfp)) {
			bb_perror_msg_and_die("network read error");
		}
	} while (chunked);
#ifdef CONFIG_FEATURE_WGET_STATUSBAR
	if (quiet_flag==FALSE)
		progressmeter(1);
#endif
	if (!proxy && target.is_ftp) {
		fclose(dfp);
		if (ftpcmd(NULL, NULL, sfp, buf) != 226)
			bb_error_msg_and_die("ftp error: %s", buf+4);
		ftpcmd("QUIT", NULL, sfp, buf);
	}
	exit(EXIT_SUCCESS);
}


void parse_url(char *url, struct host_info *h)
{
	char *cp, *sp, *up, *pp;

	if (strncmp(url, "http://", 7) == 0) {
		h->port = bb_lookup_port("http", 80);
		h->host = url + 7;
		h->is_ftp = 0;
	} else if (strncmp(url, "ftp://", 6) == 0) {
		h->port = bb_lookup_port("ftp", 21);
		h->host = url + 6;
		h->is_ftp = 1;
	} else
		bb_error_msg_and_die("not an http or ftp url: %s", url);

	sp = strchr(h->host, '/');
	if (sp != NULL) {
		*sp++ = '\0';
		h->path = sp;
	} else
		h->path = bb_xstrdup("");

	up = strrchr(h->host, '@');
	if (up != NULL) {
		h->user = h->host;
		*up++ = '\0';
		h->host = up;
	} else
		h->user = NULL;

	pp = h->host;

#ifdef CONFIG_FEATURE_WGET_IP6_LITERAL
	if (h->host[0] == '[') {
		char *ep;

		ep = h->host + 1;
		while (*ep == ':' || isxdigit (*ep))
			ep++;
		if (*ep == ']') {
			h->host++;
			*ep = '\0';
			pp = ep + 1;
		}
	}
#endif

	cp = strchr(pp, ':');
	if (cp != NULL) {
		*cp++ = '\0';
		h->port = atoi(cp);
	}

}


FILE *open_socket(struct sockaddr_in *s_in)
{
	FILE *fp;

	fp = fdopen(xconnect(s_in), "r+");
	if (fp == NULL)
		bb_perror_msg_and_die("fdopen()");

	return fp;
}


char *gethdr(char *buf, size_t bufsiz, FILE *fp, int *istrunc)
{
	char *s, *hdrval;
	int c;

	*istrunc = 0;

	/* retrieve header line */
	if (fgets(buf, bufsiz, fp) == NULL)
		return NULL;

	/* see if we are at the end of the headers */
	for (s = buf ; *s == '\r' ; ++s)
		;
	if (s[0] == '\n')
		return NULL;

	/* convert the header name to lower case */
	for (s = buf ; isalnum(*s) || *s == '-' ; ++s)
		*s = tolower(*s);

	/* verify we are at the end of the header name */
	if (*s != ':')
		bb_error_msg_and_die("bad header line: %s", buf);

	/* locate the start of the header value */
	for (*s++ = '\0' ; *s == ' ' || *s == '\t' ; ++s)
		;
	hdrval = s;

	/* locate the end of header */
	while (*s != '\0' && *s != '\r' && *s != '\n')
		++s;

	/* end of header found */
	if (*s != '\0') {
		*s = '\0';
		return hdrval;
	}

	/* Rats!  The buffer isn't big enough to hold the entire header value. */
	while (c = getc(fp), c != EOF && c != '\n')
		;
	*istrunc = 1;
	return hdrval;
}

static int ftpcmd(char *s1, char *s2, FILE *fp, char *buf)
{
	char *p;
	
	if (s1) {
		if (!s2) s2="";
		fprintf(fp, "%s%s\r\n", s1, s2);
		fflush(fp);
	}
	
	do {
		p = fgets(buf, 510, fp);
		if (!p)
			bb_perror_msg_and_die("fgets()");
	} while (! isdigit(buf[0]) || buf[3] != ' ');
	
	return atoi(buf);
}

#ifdef CONFIG_FEATURE_WGET_STATUSBAR
/* Stuff below is from BSD rcp util.c, as added to openshh. 
 * Original copyright notice is retained at the end of this file.
 * 
 */ 


static int
getttywidth(void)
{
	int width=0;
	get_terminal_width_height(0, &width, NULL);
	return (width);
}

static void
updateprogressmeter(int ignore)
{
	int save_errno = errno;

	progressmeter(0);
	errno = save_errno;
}

static void
alarmtimer(int wait)
{
	struct itimerval itv;

	itv.it_value.tv_sec = wait;
	itv.it_value.tv_usec = 0;
	itv.it_interval = itv.it_value;
	setitimer(ITIMER_REAL, &itv, NULL);
}


static void
progressmeter(int flag)
{
	static const char prefixes[] = " KMGTP";
	static struct timeval lastupdate;
	static off_t lastsize, totalsize;
	struct timeval now, td, wait;
	off_t cursize, abbrevsize;
	double elapsed;
	int ratio, barlength, i, remaining;
	char buf[256];

	if (flag == -1) {
		(void) gettimeofday(&start, (struct timezone *) 0);
		lastupdate = start;
		lastsize = 0;
		totalsize = filesize; /* as filesize changes.. */
	}

	(void) gettimeofday(&now, (struct timezone *) 0);
	cursize = statbytes;
	if (totalsize != 0 && !chunked) {
		ratio = 100.0 * cursize / totalsize;
		ratio = MAX(ratio, 0);
		ratio = MIN(ratio, 100);
	} else
		ratio = 100;

	snprintf(buf, sizeof(buf), "\r%-20.20s %3d%% ", curfile, ratio);

	barlength = getttywidth() - 51;
	if (barlength > 0) {
		i = barlength * ratio / 100;
		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
			 "|%.*s%*s|", i,
			 "*****************************************************************************"
			 "*****************************************************************************",
			 barlength - i, "");
	}
	i = 0;
	abbrevsize = cursize;
	while (abbrevsize >= 100000 && i < sizeof(prefixes)) {
		i++;
		abbrevsize >>= 10;
	}
	snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " %5d %c%c ",
	     (int) abbrevsize, prefixes[i], prefixes[i] == ' ' ? ' ' :
		 'B');

	timersub(&now, &lastupdate, &wait);
	if (cursize > lastsize) {
		lastupdate = now;
		lastsize = cursize;
		if (wait.tv_sec >= STALLTIME) {
			start.tv_sec += wait.tv_sec;
			start.tv_usec += wait.tv_usec;
		}
		wait.tv_sec = 0;
	}
	timersub(&now, &start, &td);
	elapsed = td.tv_sec + (td.tv_usec / 1000000.0);

	if (wait.tv_sec >= STALLTIME) {
		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
			 " - stalled -");
	} else if (statbytes <= 0 || elapsed <= 0.0 || cursize > totalsize || chunked) {
		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
			 "   --:-- ETA");
	} else {
		remaining = (int) (totalsize / (statbytes / elapsed) - elapsed);
		i = remaining / 3600;
		if (i)
			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
				 "%2d:", i);
		else
			snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
				 "   ");
		i = remaining % 3600;
		snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
			 "%02d:%02d ETA", i / 60, i % 60);
	}
	write(fileno(stderr), buf, strlen(buf));

	if (flag == -1) {
		struct sigaction sa;
		sa.sa_handler = updateprogressmeter;
		sigemptyset(&sa.sa_mask);
		sa.sa_flags = SA_RESTART;
		sigaction(SIGALRM, &sa, NULL);
		alarmtimer(1);
	} else if (flag == 1) {
		alarmtimer(0);
		statbytes = 0;
		putc('\n', stderr);
	}
}
#endif

/* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff,
 * much of which was blatently stolen from openssh.  */
 
/*-
 * Copyright (c) 1992, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * 3. <BSD Advertising Clause omitted per the July 22, 1999 licensing change 
 *		ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change> 
 *
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	$Id: wget.c,v 1.63 2003/12/20 01:47:18 bug1 Exp $
 */



/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/