fetch.c revision 106041 
1/*-
2 * Copyright (c) 2000 Dag-Erling Co�dan Sm�rgrav
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer
10 *    in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: head/usr.bin/fetch/fetch.c 106041 2002-10-27 15:15:13Z des $");
31
32#include <sys/param.h>
33#include <sys/socket.h>
34#include <sys/stat.h>
35#include <sys/time.h>
36
37#include <ctype.h>
38#include <err.h>
39#include <errno.h>
40#include <signal.h>
41#include <stdio.h>
42#include <stdlib.h>
43#include <string.h>
44#include <sysexits.h>
45#include <termios.h>
46#include <unistd.h>
47
48#include <fetch.h>
49
50#define MINBUFSIZE	4096
51
52/* Option flags */
53int	 A_flag;	/*    -A: do not follow 302 redirects */
54int	 a_flag;	/*    -a: auto retry */
55off_t	 B_size;	/*    -B: buffer size */
56int	 b_flag;	/*!   -b: workaround TCP bug */
57char    *c_dirname;	/*    -c: remote directory */
58int	 d_flag;	/*    -d: direct connection */
59int	 F_flag;	/*    -F: restart without checking mtime  */
60char	*f_filename;	/*    -f: file to fetch */
61char	*h_hostname;	/*    -h: host to fetch from */
62int	 l_flag;	/*    -l: link rather than copy file: URLs */
63int	 m_flag;	/* -[Mm]: mirror mode */
64int	 n_flag;	/*    -n: do not preserve modification time */
65int	 o_flag;	/*    -o: specify output file */
66int	 o_directory;	/*        output file is a directory */
67char	*o_filename;	/*        name of output file */
68int	 o_stdout;	/*        output file is stdout */
69int	 once_flag;	/*    -1: stop at first successful file */
70int	 p_flag;	/* -[Pp]: use passive FTP */
71int	 R_flag;	/*    -R: don't delete partially transferred files */
72int	 r_flag;	/*    -r: restart previously interrupted transfer */
73off_t	 S_size;        /*    -S: require size to match */
74int	 s_flag;        /*    -s: show size, don't fetch */
75long	 T_secs = 120;	/*    -T: transfer timeout in seconds */
76int	 t_flag;	/*!   -t: workaround TCP bug */
77int	 U_flag;	/*    -U: do not use high ports */
78int	 v_level = 1;	/*    -v: verbosity level */
79int	 v_tty;		/*        stdout is a tty */
80pid_t	 pgrp;		/*        our process group */
81long	 w_secs;	/*    -w: retry delay */
82int	 family = PF_UNSPEC;	/* -[46]: address family to use */
83
84int	 sigalrm;	/* SIGALRM received */
85int	 siginfo;	/* SIGINFO received */
86int	 sigint;	/* SIGINT received */
87
88long	 ftp_timeout;	/* default timeout for FTP transfers */
89long	 http_timeout;	/* default timeout for HTTP transfers */
90u_char	*buf;		/* transfer buffer */
91
92
93/*
94 * Signal handler
95 */
96static void
97sig_handler(int sig)
98{
99	switch (sig) {
100	case SIGALRM:
101		sigalrm = 1;
102		break;
103	case SIGINFO:
104		siginfo = 1;
105		break;
106	case SIGINT:
107		sigint = 1;
108		break;
109	}
110}
111
112struct xferstat {
113	char		 name[40];
114	struct timeval	 start;
115	struct timeval	 end;
116	struct timeval	 last;
117	off_t		 size;
118	off_t		 offset;
119	off_t		 rcvd;
120};
121
122/*
123 * Update the stats display
124 */
125static void
126stat_display(struct xferstat *xs, int force)
127{
128	struct timeval now;
129	int ctty_pgrp;
130
131	if (!v_tty || !v_level)
132		return;
133
134	/* check if we're the foreground process */
135	if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) == -1 ||
136	    (pid_t)ctty_pgrp != pgrp)
137		return;
138
139	gettimeofday(&now, NULL);
140	if (!force && now.tv_sec <= xs->last.tv_sec)
141		return;
142	xs->last = now;
143
144	fprintf(stderr, "\rReceiving %s", xs->name);
145	if (xs->size <= 0) {
146		fprintf(stderr, ": %lld bytes", (long long)xs->rcvd);
147	} else {
148		long elapsed;
149
150		fprintf(stderr, " (%lld bytes): %d%%", (long long)xs->size,
151		    (int)((100.0 * xs->rcvd) / xs->size));
152		elapsed = xs->last.tv_sec - xs->start.tv_sec;
153		if (elapsed > 30) {
154			long remaining;
155
156			remaining = ((xs->size * elapsed) / xs->rcvd) - elapsed;
157			fprintf(stderr, " (ETA ");
158			if (remaining > 3600) {
159				fprintf(stderr, "%02ld:", remaining / 3600);
160				remaining %= 3600;
161			}
162			fprintf(stderr, "%02ld:%02ld)  ",
163			    remaining / 60, remaining % 60);
164		}
165	}
166}
167
168/*
169 * Initialize the transfer statistics
170 */
171static void
172stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset)
173{
174	snprintf(xs->name, sizeof xs->name, "%s", name);
175	gettimeofday(&xs->start, NULL);
176	xs->last.tv_sec = xs->last.tv_usec = 0;
177	xs->end = xs->last;
178	xs->size = size;
179	xs->offset = offset;
180	xs->rcvd = offset;
181	stat_display(xs, 1);
182}
183
184/*
185 * Update the transfer statistics
186 */
187static void
188stat_update(struct xferstat *xs, off_t rcvd)
189{
190	xs->rcvd = rcvd;
191	stat_display(xs, 0);
192}
193
194/*
195 * Finalize the transfer statistics
196 */
197static void
198stat_end(struct xferstat *xs)
199{
200	double delta;
201	double bps;
202
203	if (!v_level)
204		return;
205
206	gettimeofday(&xs->end, NULL);
207
208	stat_display(xs, 1);
209	fputc('\n', stderr);
210	delta = (xs->end.tv_sec + (xs->end.tv_usec / 1.e6))
211	    - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6));
212	fprintf(stderr, "%lld bytes transferred in %.1f seconds ",
213	    (long long)(xs->rcvd - xs->offset), delta);
214	bps = (xs->rcvd - xs->offset) / delta;
215	if (bps > 1024*1024)
216		fprintf(stderr, "(%.2f MBps)\n", bps / (1024*1024));
217	else if (bps > 1024)
218		fprintf(stderr, "(%.2f kBps)\n", bps / 1024);
219	else
220		fprintf(stderr, "(%.2f Bps)\n", bps);
221}
222
223/*
224 * Ask the user for authentication details
225 */
226static int
227query_auth(struct url *URL)
228{
229	struct termios tios;
230	tcflag_t saved_flags;
231	int i, nopwd;
232
233
234	fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n",
235	    URL->scheme, URL->host, URL->port);
236
237	fprintf(stderr, "Login: ");
238	if (fgets(URL->user, sizeof URL->user, stdin) == NULL)
239		return -1;
240	for (i = 0; URL->user[i]; ++i)
241		if (isspace(URL->user[i]))
242			URL->user[i] = '\0';
243
244	fprintf(stderr, "Password: ");
245	if (tcgetattr(STDIN_FILENO, &tios) == 0) {
246		saved_flags = tios.c_lflag;
247		tios.c_lflag &= ~ECHO;
248		tios.c_lflag |= ECHONL|ICANON;
249		tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios);
250		nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
251		tios.c_lflag = saved_flags;
252		tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios);
253	} else {
254		nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
255	}
256	if (nopwd)
257		return -1;
258
259	for (i = 0; URL->pwd[i]; ++i)
260		if (isspace(URL->pwd[i]))
261			URL->pwd[i] = '\0';
262	return 0;
263}
264
265/*
266 * Fetch a file
267 */
268static int
269fetch(char *URL, const char *path)
270{
271	struct url *url;
272	struct url_stat us;
273	struct stat sb, nsb;
274	struct xferstat xs;
275	FILE *f, *of;
276	size_t size, wr;
277	off_t count;
278	char flags[8];
279	const char *slash;
280	char *tmppath;
281	int r;
282	u_int timeout;
283	u_char *ptr;
284
285	f = of = NULL;
286	tmppath = NULL;
287
288	/* parse URL */
289	if ((url = fetchParseURL(URL)) == NULL) {
290		warnx("%s: parse error", URL);
291		goto failure;
292	}
293
294	/* if no scheme was specified, take a guess */
295	if (!*url->scheme) {
296		if (!*url->host)
297			strcpy(url->scheme, SCHEME_FILE);
298		else if (strncasecmp(url->host, "ftp.", 4) == 0)
299			strcpy(url->scheme, SCHEME_FTP);
300		else if (strncasecmp(url->host, "www.", 4) == 0)
301			strcpy(url->scheme, SCHEME_HTTP);
302	}
303
304	timeout = 0;
305	*flags = 0;
306	count = 0;
307
308	/* common flags */
309	if (v_level > 1)
310		strcat(flags, "v");
311	if (v_level > 2)
312		fetchDebug = 1;
313	switch (family) {
314	case PF_INET:
315		strcat(flags, "4");
316		break;
317	case PF_INET6:
318		strcat(flags, "6");
319		break;
320	}
321
322	/* FTP specific flags */
323	if (strcmp(url->scheme, "ftp") == 0) {
324		if (p_flag)
325			strcat(flags, "p");
326		if (d_flag)
327			strcat(flags, "d");
328		if (U_flag)
329			strcat(flags, "l");
330		timeout = T_secs ? T_secs : ftp_timeout;
331	}
332
333	/* HTTP specific flags */
334	if (strcmp(url->scheme, "http") == 0) {
335		if (d_flag)
336			strcat(flags, "d");
337		if (A_flag)
338			strcat(flags, "A");
339		timeout = T_secs ? T_secs : http_timeout;
340	}
341
342	/* set the protocol timeout. */
343	fetchTimeout = timeout;
344
345	/* just print size */
346	if (s_flag) {
347		if (timeout)
348			alarm(timeout);
349		r = fetchStat(url, &us, flags);
350		if (timeout)
351		    alarm(0);
352		if (sigalrm || sigint)
353			goto signal;
354		if (r == -1) {
355			warnx("%s", fetchLastErrString);
356			goto failure;
357		}
358		if (us.size == -1)
359			printf("Unknown\n");
360		else
361			printf("%lld\n", (long long)us.size);
362		goto success;
363	}
364
365	/*
366	 * If the -r flag was specified, we have to compare the local
367	 * and remote files, so we should really do a fetchStat()
368	 * first, but I know of at least one HTTP server that only
369	 * sends the content size in response to GET requests, and
370	 * leaves it out of replies to HEAD requests.  Also, in the
371	 * (frequent) case that the local and remote files match but
372	 * the local file is truncated, we have sufficient information
373	 * before the compare to issue a correct request.  Therefore,
374	 * we always issue a GET request as if we were sure the local
375	 * file was a truncated copy of the remote file; we can drop
376	 * the connection later if we change our minds.
377	 */
378	sb.st_size = -1;
379	if (!o_stdout && stat(path, &sb) == -1 && errno != ENOENT) {
380		warnx("%s: stat()", path);
381		goto failure;
382	}
383	if (!o_stdout && r_flag && S_ISREG(sb.st_mode))
384		url->offset = sb.st_size;
385
386	/* start the transfer */
387	if (timeout)
388		alarm(timeout);
389	f = fetchXGet(url, &us, flags);
390	if (sigalrm || sigint)
391		goto signal;
392	if (f == NULL) {
393		warnx("%s: %s", path, fetchLastErrString);
394		goto failure;
395	}
396	if (sigint)
397		goto signal;
398
399	/* check that size is as expected */
400	if (S_size) {
401		if (us.size == -1) {
402			warnx("%s: size unknown", path);
403			goto failure;
404		} else if (us.size != S_size) {
405			warnx("%s: size mismatch: expected %lld, actual %lld",
406			    path, (long long)S_size, (long long)us.size);
407			goto failure;
408		}
409	}
410
411	/* symlink instead of copy */
412	if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) {
413		if (symlink(url->doc, path) == -1) {
414			warn("%s: symlink()", path);
415			goto failure;
416		}
417		goto success;
418	}
419
420	if (us.size == -1 && !o_stdout)
421		warnx("%s: size of remote file is not known", path);
422	if (v_level > 1) {
423		if (sb.st_size != -1)
424			fprintf(stderr, "local size / mtime: %lld / %ld\n",
425			    (long long)sb.st_size, (long)sb.st_mtime);
426		if (us.size != -1)
427			fprintf(stderr, "remote size / mtime: %lld / %ld\n",
428			    (long long)us.size, (long)us.mtime);
429	}
430
431	/* open output file */
432	if (o_stdout) {
433		/* output to stdout */
434		of = stdout;
435	} else if (r_flag && sb.st_size != -1) {
436		/* resume mode, local file exists */
437		if (!F_flag && us.mtime && sb.st_mtime != us.mtime) {
438			/* no match! have to refetch */
439			fclose(f);
440			/* if precious, warn the user and give up */
441			if (R_flag) {
442				warnx("%s: local modification time "
443				    "does not match remote", path);
444				goto failure_keep;
445			}
446		} else {
447			if (us.size == sb.st_size)
448				/* nothing to do */
449				goto success;
450			if (sb.st_size > us.size) {
451				/* local file too long! */
452				warnx("%s: local file (%lld bytes) is longer "
453				    "than remote file (%lld bytes)", path,
454				    (long long)sb.st_size, (long long)us.size);
455				goto failure;
456			}
457			/* we got it, open local file */
458			if ((of = fopen(path, "a")) == NULL) {
459				warn("%s: fopen()", path);
460				goto failure;
461			}
462			/* check that it didn't move under our feet */
463			if (fstat(fileno(of), &nsb) == -1) {
464				/* can't happen! */
465				warn("%s: fstat()", path);
466				goto failure;
467			}
468			if (nsb.st_dev != sb.st_dev ||
469			    nsb.st_ino != nsb.st_ino ||
470			    nsb.st_size != sb.st_size) {
471				warnx("%s: file has changed", path);
472				fclose(of);
473				of = NULL;
474				sb = nsb;
475			}
476		}
477	} else if (m_flag && sb.st_size != -1) {
478		/* mirror mode, local file exists */
479		if (sb.st_size == us.size && sb.st_mtime == us.mtime)
480			goto success;
481	}
482
483	if (of == NULL) {
484		/*
485		 * We don't yet have an output file; either this is a
486		 * vanilla run with no special flags, or the local and
487		 * remote files didn't match.
488		 */
489
490		if (url->offset != 0) {
491			/*
492			 * We tried to restart a transfer, but for
493			 * some reason gave up - so we have to restart
494			 * from scratch if we want the whole file
495			 */
496			url->offset = 0;
497			if ((f = fetchXGet(url, &us, flags)) == NULL) {
498				warnx("%s: %s", path, fetchLastErrString);
499				goto failure;
500			}
501			if (sigint)
502				goto signal;
503		}
504
505		/* construct a temp file name */
506		if (sb.st_size != -1 && S_ISREG(sb.st_mode)) {
507			if ((slash = strrchr(path, '/')) == NULL)
508				slash = path;
509			else
510				++slash;
511			asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s",
512			    (int)(slash - path), path, slash);
513			if (tmppath != NULL) {
514				mkstemps(tmppath, strlen(slash) + 1);
515				of = fopen(tmppath, "w");
516			}
517		}
518		if (of == NULL)
519			of = fopen(path, "w");
520		if (of == NULL) {
521			warn("%s: open()", path);
522			goto failure;
523		}
524	}
525	count = url->offset;
526
527	/* start the counter */
528	stat_start(&xs, path, us.size, count);
529
530	sigalrm = siginfo = sigint = 0;
531
532	/* suck in the data */
533	signal(SIGINFO, sig_handler);
534	while (!sigint) {
535		if (us.size != -1 && us.size - count < B_size)
536			size = us.size - count;
537		else
538			size = B_size;
539		if (siginfo) {
540			stat_end(&xs);
541			siginfo = 0;
542		}
543		if ((size = fread(buf, 1, size, f)) == 0) {
544			if (ferror(f) && errno == EINTR && !sigint)
545				clearerr(f);
546			else
547				break;
548		}
549		stat_update(&xs, count += size);
550		for (ptr = buf; size > 0; ptr += wr, size -= wr)
551			if ((wr = fwrite(ptr, 1, size, of)) < size) {
552				if (ferror(of) && errno == EINTR && !sigint)
553					clearerr(of);
554				else
555					break;
556			}
557		if (size != 0)
558			break;
559	}
560	if (!sigalrm)
561		sigalrm = ferror(f) && errno == ETIMEDOUT;
562	signal(SIGINFO, SIG_DFL);
563
564	stat_end(&xs);
565
566	/*
567	 * If the transfer timed out or was interrupted, we still want to
568	 * set the mtime in case the file is not removed (-r or -R) and
569	 * the user later restarts the transfer.
570	 */
571 signal:
572	/* set mtime of local file */
573	if (!n_flag && us.mtime && !o_stdout
574	    && (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) {
575		struct timeval tv[2];
576
577		fflush(of);
578		tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime);
579		tv[1].tv_sec = (long)us.mtime;
580		tv[0].tv_usec = tv[1].tv_usec = 0;
581		if (utimes(tmppath ? tmppath : path, tv))
582			warn("%s: utimes()", tmppath ? tmppath : path);
583	}
584
585	/* timed out or interrupted? */
586	if (sigalrm)
587		warnx("transfer timed out");
588	if (sigint) {
589		warnx("transfer interrupted");
590		goto failure;
591	}
592
593	if (!sigalrm) {
594		/* check the status of our files */
595		if (ferror(f))
596			warn("%s", URL);
597		if (ferror(of))
598			warn("%s", path);
599		if (ferror(f) || ferror(of))
600			goto failure;
601	}
602
603	/* did the transfer complete normally? */
604	if (us.size != -1 && count < us.size) {
605		warnx("%s appears to be truncated: %lld/%lld bytes",
606		    path, (long long)count, (long long)us.size);
607		goto failure_keep;
608	}
609
610	/*
611	 * If the transfer timed out and we didn't know how much to
612	 * expect, assume the worst (i.e. we didn't get all of it)
613	 */
614	if (sigalrm && us.size == -1) {
615		warnx("%s may be truncated", path);
616		goto failure_keep;
617	}
618
619 success:
620	r = 0;
621	if (tmppath != NULL && rename(tmppath, path) == -1) {
622		warn("%s: rename()", path);
623		goto failure_keep;
624	}
625	goto done;
626 failure:
627	if (of && of != stdout && !R_flag && !r_flag)
628		if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG))
629			unlink(tmppath ? tmppath : path);
630	if (R_flag && tmppath != NULL && sb.st_size == -1)
631		rename(tmppath, path); /* ignore errors here */
632 failure_keep:
633	r = -1;
634	goto done;
635 done:
636	if (f)
637		fclose(f);
638	if (of && of != stdout)
639		fclose(of);
640	if (url)
641		fetchFreeURL(url);
642	if (tmppath != NULL)
643		free(tmppath);
644	return r;
645}
646
647static void
648usage(void)
649{
650	fprintf(stderr, "%s\n%s\n%s\n",
651	    "usage: fetch [-146AFMPRUadlmnpqrsv] [-o outputfile] [-S bytes]",
652	    "             [-B bytes] [-T seconds] [-w seconds]",
653	    "             [-h host -f file [-c dir] | URL ...]");
654}
655
656
657/*
658 * Entry point
659 */
660int
661main(int argc, char *argv[])
662{
663	struct stat sb;
664	struct sigaction sa;
665	const char *p, *s;
666	char *end, *q;
667	int c, e, r;
668
669	while ((c = getopt(argc, argv,
670	    "146AaB:bc:dFf:Hh:lMmnPpo:qRrS:sT:tUvw:")) != -1)
671		switch (c) {
672		case '1':
673			once_flag = 1;
674			break;
675		case '4':
676			family = PF_INET;
677			break;
678		case '6':
679			family = PF_INET6;
680			break;
681		case 'A':
682			A_flag = 1;
683			break;
684		case 'a':
685			a_flag = 1;
686			break;
687		case 'B':
688			B_size = (off_t)strtol(optarg, &end, 10);
689			if (*optarg == '\0' || *end != '\0')
690				errx(1, "invalid buffer size (%s)", optarg);
691			break;
692		case 'b':
693			warnx("warning: the -b option is deprecated");
694			b_flag = 1;
695			break;
696		case 'c':
697			c_dirname = optarg;
698			break;
699		case 'd':
700			d_flag = 1;
701			break;
702		case 'F':
703			F_flag = 1;
704			break;
705		case 'f':
706			f_filename = optarg;
707			break;
708		case 'H':
709			warnx("the -H option is now implicit, "
710			    "use -U to disable");
711			break;
712		case 'h':
713			h_hostname = optarg;
714			break;
715		case 'l':
716			l_flag = 1;
717			break;
718		case 'o':
719			o_flag = 1;
720			o_filename = optarg;
721			break;
722		case 'M':
723		case 'm':
724			if (r_flag)
725				errx(1, "the -m and -r flags "
726				    "are mutually exclusive");
727			m_flag = 1;
728			break;
729		case 'n':
730			n_flag = 1;
731			break;
732		case 'P':
733		case 'p':
734			p_flag = 1;
735			break;
736		case 'q':
737			v_level = 0;
738			break;
739		case 'R':
740			R_flag = 1;
741			break;
742		case 'r':
743			if (m_flag)
744				errx(1, "the -m and -r flags "
745				    "are mutually exclusive");
746			r_flag = 1;
747			break;
748		case 'S':
749			S_size = (off_t)strtol(optarg, &end, 10);
750			if (*optarg == '\0' || *end != '\0')
751				errx(1, "invalid size (%s)", optarg);
752			break;
753		case 's':
754			s_flag = 1;
755			break;
756		case 'T':
757			T_secs = strtol(optarg, &end, 10);
758			if (*optarg == '\0' || *end != '\0')
759				errx(1, "invalid timeout (%s)", optarg);
760			break;
761		case 't':
762			t_flag = 1;
763			warnx("warning: the -t option is deprecated");
764			break;
765		case 'U':
766			U_flag = 1;
767			break;
768		case 'v':
769			v_level++;
770			break;
771		case 'w':
772			a_flag = 1;
773			w_secs = strtol(optarg, &end, 10);
774			if (*optarg == '\0' || *end != '\0')
775				errx(1, "invalid delay (%s)", optarg);
776			break;
777		default:
778			usage();
779			exit(EX_USAGE);
780		}
781
782	argc -= optind;
783	argv += optind;
784
785	if (h_hostname || f_filename || c_dirname) {
786		if (!h_hostname || !f_filename || argc) {
787			usage();
788			exit(EX_USAGE);
789		}
790		/* XXX this is a hack. */
791		if (strcspn(h_hostname, "@:/") != strlen(h_hostname))
792			errx(1, "invalid hostname");
793		if (asprintf(argv, "ftp://%s/%s/%s", h_hostname,
794		    c_dirname ? c_dirname : "", f_filename) == -1)
795			errx(1, "%s", strerror(ENOMEM));
796		argc++;
797	}
798
799	if (!argc) {
800		usage();
801		exit(EX_USAGE);
802	}
803
804	/* allocate buffer */
805	if (B_size < MINBUFSIZE)
806		B_size = MINBUFSIZE;
807	if ((buf = malloc(B_size)) == NULL)
808		errx(1, "%s", strerror(ENOMEM));
809
810	/* timeouts */
811	if ((s = getenv("FTP_TIMEOUT")) != NULL) {
812		ftp_timeout = strtol(s, &end, 10);
813		if (*s == '\0' || *end != '\0' || ftp_timeout < 0) {
814			warnx("FTP_TIMEOUT (%s) is not a positive integer", s);
815			ftp_timeout = 0;
816		}
817	}
818	if ((s = getenv("HTTP_TIMEOUT")) != NULL) {
819		http_timeout = strtol(s, &end, 10);
820		if (*s == '\0' || *end != '\0' || http_timeout < 0) {
821			warnx("HTTP_TIMEOUT (%s) is not a positive integer", s);
822			http_timeout = 0;
823		}
824	}
825
826	/* signal handling */
827	sa.sa_flags = 0;
828	sa.sa_handler = sig_handler;
829	sigemptyset(&sa.sa_mask);
830	sigaction(SIGALRM, &sa, NULL);
831	sa.sa_flags = SA_RESETHAND;
832	sigaction(SIGINT, &sa, NULL);
833	fetchRestartCalls = 0;
834
835	/* output file */
836	if (o_flag) {
837		if (strcmp(o_filename, "-") == 0) {
838			o_stdout = 1;
839		} else if (stat(o_filename, &sb) == -1) {
840			if (errno == ENOENT) {
841				if (argc > 1)
842					errx(EX_USAGE, "%s is not a directory",
843					    o_filename);
844			} else {
845				err(EX_IOERR, "%s", o_filename);
846			}
847		} else {
848			if (sb.st_mode & S_IFDIR)
849				o_directory = 1;
850		}
851	}
852
853	/* check if output is to a tty (for progress report) */
854	v_tty = isatty(STDERR_FILENO);
855	if (v_tty)
856		pgrp = getpgrp();
857
858	r = 0;
859
860	/* authentication */
861	if (v_tty)
862		fetchAuthMethod = query_auth;
863
864	while (argc) {
865		if ((p = strrchr(*argv, '/')) == NULL)
866			p = *argv;
867		else
868			p++;
869
870		if (!*p)
871			p = "fetch.out";
872
873		fetchLastErrCode = 0;
874
875		if (o_flag) {
876			if (o_stdout) {
877				e = fetch(*argv, "-");
878			} else if (o_directory) {
879				asprintf(&q, "%s/%s", o_filename, p);
880				e = fetch(*argv, q);
881				free(q);
882			} else {
883				e = fetch(*argv, o_filename);
884			}
885		} else {
886			e = fetch(*argv, p);
887		}
888
889		if (sigint)
890			kill(getpid(), SIGINT);
891
892		if (e == 0 && once_flag)
893			exit(0);
894
895		if (e) {
896			r = 1;
897			if ((fetchLastErrCode
898			    && fetchLastErrCode != FETCH_UNAVAIL
899			    && fetchLastErrCode != FETCH_MOVED
900			    && fetchLastErrCode != FETCH_URL
901			    && fetchLastErrCode != FETCH_RESOLV
902			    && fetchLastErrCode != FETCH_UNKNOWN)) {
903				if (w_secs && v_level)
904					fprintf(stderr, "Waiting %ld seconds "
905					    "before retrying\n", w_secs);
906				if (w_secs)
907					sleep(w_secs);
908				if (a_flag)
909					continue;
910			}
911		}
912
913		argc--, argv++;
914	}
915
916	exit(r);
917}
918