fetch.c revision 80521 
1
2/*-
3 * Copyright (c) 2000 Dag-Erling Co�dan Sm�rgrav
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer
11 *    in this position and unchanged.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. The name of the author may not be used to endorse or promote products
16 *    derived from this software without specific prior written permission
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 *
29 *	$FreeBSD: head/usr.bin/fetch/fetch.c 80521 2001-07-28 21:34:56Z se $
30 */
31
32#include <sys/param.h>
33#include <sys/stat.h>
34#include <sys/socket.h>
35
36#include <ctype.h>
37#include <err.h>
38#include <errno.h>
39#include <signal.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <sysexits.h>
44#include <termios.h>
45#include <unistd.h>
46
47#include <fetch.h>
48
49#define MINBUFSIZE	4096
50
51/* Option flags */
52int	 A_flag;	/*    -A: do not follow 302 redirects */
53int	 a_flag;	/*    -a: auto retry */
54off_t	 B_size;	/*    -B: buffer size */
55int	 b_flag;	/*!   -b: workaround TCP bug */
56char    *c_dirname;	/*    -c: remote directory */
57int	 d_flag;	/*    -d: direct connection */
58int	 F_flag;	/*    -F: restart without checking mtime  */
59char	*f_filename;	/*    -f: file to fetch */
60char	*h_hostname;	/*    -h: host to fetch from */
61int	 l_flag;	/*    -l: link rather than copy file: URLs */
62int	 m_flag;	/* -[Mm]: mirror mode */
63int	 n_flag;	/*    -n: do not preserve modification time */
64int	 o_flag;	/*    -o: specify output file */
65int	 o_directory;	/*        output file is a directory */
66char	*o_filename;	/*        name of output file */
67int	 o_stdout;	/*        output file is stdout */
68int	 once_flag;	/*    -1: stop at first successful file */
69int	 p_flag;	/* -[Pp]: use passive FTP */
70int	 R_flag;	/*    -R: don't delete partially transferred files */
71int	 r_flag;	/*    -r: restart previously interrupted transfer */
72off_t	 S_size;        /*    -S: require size to match */
73int	 s_flag;        /*    -s: show size, don't fetch */
74u_int	 T_secs = 0;	/*    -T: transfer timeout in seconds */
75int	 t_flag;	/*!   -t: workaround TCP bug */
76int	 U_flag;	/*    -U: do not use high ports */
77int	 v_level = 1;	/*    -v: verbosity level */
78int	 v_tty;		/*        stdout is a tty */
79u_int	 w_secs;	/*    -w: retry delay */
80int	 family = PF_UNSPEC;	/* -[46]: address family to use */
81
82int	 sigalrm;	/* SIGALRM received */
83int	 siginfo;	/* SIGINFO received */
84int	 sigint;	/* SIGINT received */
85
86u_int	 ftp_timeout;	/* default timeout for FTP transfers */
87u_int	 http_timeout;	/* default timeout for HTTP transfers */
88u_char	*buf;		/* transfer buffer */
89
90
91static void
92sig_handler(int sig)
93{
94	switch (sig) {
95	case SIGALRM:
96		sigalrm = 1;
97		break;
98	case SIGINFO:
99		siginfo = 1;
100		break;
101	case SIGINT:
102		sigint = 1;
103		break;
104	}
105}
106
107struct xferstat {
108	char		 name[40];
109	struct timeval	 start;
110	struct timeval	 end;
111	struct timeval	 last;
112	off_t		 size;
113	off_t		 offset;
114	off_t		 rcvd;
115};
116
117static void
118stat_display(struct xferstat *xs, int force)
119{
120	struct timeval now;
121
122	if (!v_tty || !v_level)
123		return;
124
125	gettimeofday(&now, NULL);
126	if (!force && now.tv_sec <= xs->last.tv_sec)
127		return;
128	xs->last = now;
129
130	fprintf(stderr, "\rReceiving %s", xs->name);
131	if (xs->size <= 0)
132		fprintf(stderr, ": %lld bytes", (long long)xs->rcvd);
133	else
134		fprintf(stderr, " (%lld bytes): %d%%", (long long)xs->size,
135		    (int)((100.0 * xs->rcvd) / xs->size));
136}
137
138static void
139stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset)
140{
141	snprintf(xs->name, sizeof xs->name, "%s", name);
142	gettimeofday(&xs->start, NULL);
143	xs->last.tv_sec = xs->last.tv_usec = 0;
144	xs->end = xs->last;
145	xs->size = size;
146	xs->offset = offset;
147	xs->rcvd = offset;
148	stat_display(xs, 1);
149}
150
151static void
152stat_update(struct xferstat *xs, off_t rcvd)
153{
154	xs->rcvd = rcvd;
155	stat_display(xs, 0);
156}
157
158static void
159stat_end(struct xferstat *xs)
160{
161	double delta;
162	double bps;
163
164	if (!v_level)
165		return;
166
167	gettimeofday(&xs->end, NULL);
168
169	stat_display(xs, 1);
170	fputc('\n', stderr);
171	delta = (xs->end.tv_sec + (xs->end.tv_usec / 1.e6))
172	    - (xs->start.tv_sec + (xs->start.tv_usec / 1.e6));
173	fprintf(stderr, "%lld bytes transferred in %.1f seconds ",
174	    (long long)(xs->rcvd - xs->offset), delta);
175	bps = (xs->rcvd - xs->offset) / delta;
176	if (bps > 1024*1024)
177		fprintf(stderr, "(%.2f MBps)\n", bps / (1024*1024));
178	else if (bps > 1024)
179		fprintf(stderr, "(%.2f kBps)\n", bps / 1024);
180	else
181		fprintf(stderr, "(%.2f Bps)\n", bps);
182}
183
184static int
185query_auth(struct url *URL)
186{
187	struct termios tios;
188	tcflag_t saved_flags;
189	int i, nopwd;
190
191
192	fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n",
193	    URL->scheme, URL->host, URL->port, URL->doc);
194
195	fprintf(stderr, "Login: ");
196	if (fgets(URL->user, sizeof URL->user, stdin) == NULL)
197		return -1;
198	for (i = 0; URL->user[i]; ++i)
199		if (isspace(URL->user[i]))
200			URL->user[i] = '\0';
201
202	fprintf(stderr, "Password: ");
203	if (tcgetattr(STDIN_FILENO, &tios) == 0) {
204		saved_flags = tios.c_lflag;
205		tios.c_lflag &= ~ECHO;
206		tios.c_lflag |= ECHONL|ICANON;
207		tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios);
208		nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
209		tios.c_lflag = saved_flags;
210		tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios);
211	} else {
212		nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
213	}
214	if (nopwd)
215		return -1;
216
217	for (i = 0; URL->pwd[i]; ++i)
218		if (isspace(URL->pwd[i]))
219			URL->pwd[i] = '\0';
220	return 0;
221}
222
223static int
224fetch(char *URL, const char *path)
225{
226	struct url *url;
227	struct url_stat us;
228	struct stat sb;
229	struct xferstat xs;
230	FILE *f, *of;
231	size_t size, wr;
232	off_t count;
233	char flags[8];
234	int r;
235	u_int timeout;
236	u_char *ptr;
237
238	f = of = NULL;
239
240	/* parse URL */
241	if ((url = fetchParseURL(URL)) == NULL) {
242		warnx("%s: parse error", URL);
243		goto failure;
244	}
245
246	/* if no scheme was specified, take a guess */
247	if (!*url->scheme) {
248		if (!*url->host)
249			strcpy(url->scheme, SCHEME_FILE);
250		else if (strncasecmp(url->host, "ftp.", 4) == 0)
251			strcpy(url->scheme, SCHEME_FTP);
252		else if (strncasecmp(url->host, "www.", 4) == 0)
253			strcpy(url->scheme, SCHEME_HTTP);
254	}
255
256	timeout = 0;
257	*flags = 0;
258	count = 0;
259
260	/* common flags */
261	if (v_level > 1)
262		strcat(flags, "v");
263	switch (family) {
264	case PF_INET:
265		strcat(flags, "4");
266		break;
267	case PF_INET6:
268		strcat(flags, "6");
269		break;
270	}
271
272	/* FTP specific flags */
273	if (strcmp(url->scheme, "ftp") == 0) {
274		if (p_flag)
275			strcat(flags, "p");
276		if (d_flag)
277			strcat(flags, "d");
278		if (U_flag)
279			strcat(flags, "l");
280		timeout = T_secs ? T_secs : ftp_timeout;
281	}
282
283	/* HTTP specific flags */
284	if (strcmp(url->scheme, "http") == 0) {
285		if (d_flag)
286			strcat(flags, "d");
287		if (A_flag)
288			strcat(flags, "A");
289		timeout = T_secs ? T_secs : http_timeout;
290	}
291
292	/* set the protocol timeout. */
293	fetchTimeout = timeout;
294
295	/* just print size */
296	if (s_flag) {
297		if (fetchStat(url, &us, flags) == -1)
298			goto failure;
299		if (us.size == -1)
300			printf("Unknown\n");
301		else
302			printf("%lld\n", (long long)us.size);
303		goto success;
304	}
305
306	/*
307	 * If the -r flag was specified, we have to compare the local
308	 * and remote files, so we should really do a fetchStat()
309	 * first, but I know of at least one HTTP server that only
310	 * sends the content size in response to GET requests, and
311	 * leaves it out of replies to HEAD requests.  Also, in the
312	 * (frequent) case that the local and remote files match but
313	 * the local file is truncated, we have sufficient information
314	 * before the compare to issue a correct request.  Therefore,
315	 * we always issue a GET request as if we were sure the local
316	 * file was a truncated copy of the remote file; we can drop
317	 * the connection later if we change our minds.
318	 */
319	if ((r_flag  || m_flag) && !o_stdout && stat(path, &sb) != -1) {
320		if (r_flag)
321			url->offset = sb.st_size;
322	} else {
323		sb.st_size = -1;
324	}
325
326	/* start the transfer */
327	if ((f = fetchXGet(url, &us, flags)) == NULL) {
328		warnx("%s: %s", path, fetchLastErrString);
329		goto failure;
330	}
331	if (sigint)
332		goto signal;
333
334	/* check that size is as expected */
335	if (S_size) {
336		if (us.size == -1) {
337			warnx("%s: size unknown", path);
338			goto failure;
339		} else if (us.size != S_size) {
340			warnx("%s: size mismatch: expected %lld, actual %lld",
341			    path, (long long)S_size, (long long)us.size);
342			goto failure;
343		}
344	}
345
346	/* symlink instead of copy */
347	if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) {
348		if (symlink(url->doc, path) == -1) {
349			warn("%s: symlink()", path);
350			goto failure;
351		}
352		goto success;
353	}
354
355	if (us.size == -1 && !o_stdout)
356		warnx("%s: size of remote file is not known", path);
357	if (v_level > 1) {
358		if (sb.st_size != -1)
359			fprintf(stderr, "local size / mtime: %lld / %ld\n",
360			    (long long)sb.st_size, (long)sb.st_mtime);
361		if (us.size != -1)
362			fprintf(stderr, "remote size / mtime: %lld / %ld\n",
363			    (long long)us.size, (long)us.mtime);
364	}
365
366	/* open output file */
367	if (o_stdout) {
368		/* output to stdout */
369		of = stdout;
370	} else if (sb.st_size != -1) {
371		/* resume mode, local file exists */
372		if (!F_flag && us.mtime && sb.st_mtime != us.mtime) {
373			/* no match! have to refetch */
374			fclose(f);
375			/* if precious, warn the user and give up */
376			if (R_flag) {
377				warnx("%s: local modification time "
378				    "does not match remote", path);
379				goto failure_keep;
380			}
381			url->offset = 0;
382			if ((f = fetchXGet(url, &us, flags)) == NULL) {
383				warnx("%s: %s", path, fetchLastErrString);
384				goto failure;
385			}
386			if (sigint)
387				goto signal;
388		} else {
389			if (us.size == sb.st_size)
390				/* nothing to do */
391				goto success;
392			if (sb.st_size > us.size) {
393				/* local file too long! */
394				warnx("%s: local file (%lld bytes) is longer "
395				    "than remote file (%lld bytes)", path,
396				    (long long)sb.st_size, (long long)us.size);
397				goto failure;
398			}
399			/* we got it, open local file and seek to offset */
400			/*
401			 * XXX there's a race condition here - the
402			 * file we open is not necessarily the same as
403			 * the one we stat()'ed earlier...
404			 */
405			if ((of = fopen(path, "a")) == NULL) {
406				warn("%s: fopen()", path);
407				goto failure;
408			}
409			if (fseek(of, url->offset, SEEK_SET) == -1) {
410				warn("%s: fseek()", path);
411				goto failure;
412			}
413		}
414	}
415	if (m_flag && sb.st_size != -1) {
416		/* mirror mode, local file exists */
417		if (sb.st_size == us.size && sb.st_mtime == us.mtime)
418			goto success;
419	}
420	if (!of) {
421		/*
422		 * We don't yet have an output file; either this is a
423		 * vanilla run with no special flags, or the local and
424		 * remote files didn't match.
425		 */
426		if ((of = fopen(path, "w")) == NULL) {
427			warn("%s: open()", path);
428			goto failure;
429		}
430	}
431	count = url->offset;
432
433	/* start the counter */
434	stat_start(&xs, path, us.size, count);
435
436	sigalrm = siginfo = sigint = 0;
437
438	/* suck in the data */
439	signal(SIGINFO, sig_handler);
440	while (!sigint && !sigalrm) {
441		if (us.size != -1 && us.size - count < B_size)
442			size = us.size - count;
443		else
444			size = B_size;
445		if (timeout)
446			alarm(timeout);
447		if (siginfo) {
448			stat_end(&xs);
449			siginfo = 0;
450		}
451		if ((size = fread(buf, 1, size, f)) == 0) {
452			if (ferror(f) && errno == EINTR && !sigalrm && !sigint)
453				clearerr(f);
454			else
455				break;
456		}
457		if (timeout)
458			alarm(0);
459		stat_update(&xs, count += size);
460		for (ptr = buf; size > 0; ptr += wr, size -= wr)
461			if ((wr = fwrite(ptr, 1, size, of)) < size) {
462				if (ferror(of) && errno == EINTR &&
463				    !sigalrm && !sigint)
464					clearerr(of);
465				else
466					break;
467			}
468		if (size != 0)
469			break;
470	}
471	signal(SIGINFO, SIG_DFL);
472
473	if (timeout)
474		alarm(0);
475
476	stat_end(&xs);
477
478	/* set mtime of local file */
479	if (!n_flag && us.mtime && !o_stdout
480	    && (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) {
481		struct timeval tv[2];
482
483		fflush(of);
484		tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime);
485		tv[1].tv_sec = (long)us.mtime;
486		tv[0].tv_usec = tv[1].tv_usec = 0;
487		if (utimes(path, tv))
488			warn("%s: utimes()", path);
489	}
490
491	/* timed out or interrupted? */
492 signal:
493	if (sigalrm)
494		warnx("transfer timed out");
495	if (sigint) {
496		warnx("transfer interrupted");
497		goto failure;
498	}
499
500	if (!sigalrm) {
501		/* check the status of our files */
502		if (ferror(f))
503			warn("%s", URL);
504		if (ferror(of))
505			warn("%s", path);
506		if (ferror(f) || ferror(of))
507			goto failure;
508	}
509
510	/* did the transfer complete normally? */
511	if (us.size != -1 && count < us.size) {
512		warnx("%s appears to be truncated: %lld/%lld bytes",
513		    path, (long long)count, (long long)us.size);
514		goto failure_keep;
515	}
516
517	/*
518	 * If the transfer timed out and we didn't know how much to
519	 * expect, assume the worst (i.e. we didn't get all of it)
520	 */
521	if (sigalrm && us.size == -1) {
522		warnx("%s may be truncated", path);
523		goto failure_keep;
524	}
525
526 success:
527	r = 0;
528	goto done;
529 failure:
530	if (of && of != stdout && !R_flag && !r_flag)
531		if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG))
532			unlink(path);
533 failure_keep:
534	r = -1;
535	goto done;
536 done:
537	if (f)
538		fclose(f);
539	if (of && of != stdout)
540		fclose(of);
541	if (url)
542		fetchFreeURL(url);
543	return r;
544}
545
546static void
547usage(void)
548{
549	fprintf(stderr, "%s\n%s\n%s\n",
550	    "Usage: fetch [-146AFMPRUadlmnpqrsv] [-o outputfile] [-S bytes]",
551	    "             [-B bytes] [-T seconds] [-w seconds]",
552	    "             [-h host -f file [-c dir] | URL ...]");
553}
554
555
556#define PARSENUM(NAME, TYPE)				\
557static int						\
558NAME(const char *s, TYPE *v)				\
559{							\
560        *v = 0;						\
561	for (*v = 0; *s; s++)				\
562		if (isdigit(*s))			\
563			*v = *v * 10 + *s - '0';	\
564		else					\
565			return -1;			\
566	return 0;					\
567}
568
569PARSENUM(parseint, u_int)
570PARSENUM(parseoff, off_t)
571
572int
573main(int argc, char *argv[])
574{
575	struct stat sb;
576	struct sigaction sa;
577	const char *p, *s;
578	char *q;
579	int c, e, r;
580
581	while ((c = getopt(argc, argv,
582	    "146AaB:bc:dFf:Hh:lMmnPpo:qRrS:sT:tUvw:")) != EOF)
583		switch (c) {
584		case '1':
585			once_flag = 1;
586			break;
587		case '4':
588			family = PF_INET;
589			break;
590		case '6':
591			family = PF_INET6;
592			break;
593		case 'A':
594			A_flag = 1;
595			break;
596		case 'a':
597			a_flag = 1;
598			break;
599		case 'B':
600			if (parseoff(optarg, &B_size) == -1)
601				errx(1, "invalid buffer size (%s)", optarg);
602			break;
603		case 'b':
604			warnx("warning: the -b option is deprecated");
605			b_flag = 1;
606			break;
607		case 'c':
608			c_dirname = optarg;
609			break;
610		case 'd':
611			d_flag = 1;
612			break;
613		case 'F':
614			F_flag = 1;
615			break;
616		case 'f':
617			f_filename = optarg;
618			break;
619		case 'H':
620			warnx("The -H option is now implicit, "
621			    "use -U to disable");
622			break;
623		case 'h':
624			h_hostname = optarg;
625			break;
626		case 'l':
627			l_flag = 1;
628			break;
629		case 'o':
630			o_flag = 1;
631			o_filename = optarg;
632			break;
633		case 'M':
634		case 'm':
635			if (r_flag)
636				errx(1, "the -m and -r flags "
637				    "are mutually exclusive");
638			m_flag = 1;
639			break;
640		case 'n':
641			n_flag = 1;
642			break;
643		case 'P':
644		case 'p':
645			p_flag = 1;
646			break;
647		case 'q':
648			v_level = 0;
649			break;
650		case 'R':
651			R_flag = 1;
652			break;
653		case 'r':
654			if (m_flag)
655				errx(1, "the -m and -r flags "
656				    "are mutually exclusive");
657			r_flag = 1;
658			break;
659		case 'S':
660			if (parseoff(optarg, &S_size) == -1)
661				errx(1, "invalid size (%s)", optarg);
662			break;
663		case 's':
664			s_flag = 1;
665			break;
666		case 'T':
667			if (parseint(optarg, &T_secs) == -1)
668				errx(1, "invalid timeout (%s)", optarg);
669			break;
670		case 't':
671			t_flag = 1;
672			warnx("warning: the -t option is deprecated");
673			break;
674		case 'U':
675			U_flag = 1;
676			break;
677		case 'v':
678			v_level++;
679			break;
680		case 'w':
681			a_flag = 1;
682			if (parseint(optarg, &w_secs) == -1)
683				errx(1, "invalid delay (%s)", optarg);
684			break;
685		default:
686			usage();
687			exit(EX_USAGE);
688		}
689
690	argc -= optind;
691	argv += optind;
692
693	if (h_hostname || f_filename || c_dirname) {
694		if (!h_hostname || !f_filename || argc) {
695			usage();
696			exit(EX_USAGE);
697		}
698		/* XXX this is a hack. */
699		if (strcspn(h_hostname, "@:/") != strlen(h_hostname))
700			errx(1, "invalid hostname");
701		if (asprintf(argv, "ftp://%s/%s/%s", h_hostname,
702		    c_dirname ? c_dirname : "", f_filename) == -1)
703			errx(1, "%s", strerror(ENOMEM));
704		argc++;
705	}
706
707	if (!argc) {
708		usage();
709		exit(EX_USAGE);
710	}
711
712	/* allocate buffer */
713	if (B_size < MINBUFSIZE)
714		B_size = MINBUFSIZE;
715	if ((buf = malloc(B_size)) == NULL)
716		errx(1, "%s", strerror(ENOMEM));
717
718	/* timeouts */
719	if ((s = getenv("FTP_TIMEOUT")) != NULL) {
720		if (parseint(s, &ftp_timeout) == -1) {
721			warnx("FTP_TIMEOUT (%s) is not a positive integer",
722			    optarg);
723			ftp_timeout = 0;
724		}
725	}
726	if ((s = getenv("HTTP_TIMEOUT")) != NULL) {
727		if (parseint(s, &http_timeout) == -1) {
728			warnx("HTTP_TIMEOUT (%s) is not a positive integer",
729			    optarg);
730			http_timeout = 0;
731		}
732	}
733
734	/* signal handling */
735	sa.sa_flags = 0;
736	sa.sa_handler = sig_handler;
737	sigemptyset(&sa.sa_mask);
738	sigaction(SIGALRM, &sa, NULL);
739	sa.sa_flags = SA_RESETHAND;
740	sigaction(SIGINT, &sa, NULL);
741	fetchRestartCalls = 0;
742
743	/* output file */
744	if (o_flag) {
745		if (strcmp(o_filename, "-") == 0) {
746			o_stdout = 1;
747		} else if (stat(o_filename, &sb) == -1) {
748			if (errno == ENOENT) {
749				if (argc > 1)
750					errx(EX_USAGE, "%s is not a directory",
751					    o_filename);
752			} else {
753				err(EX_IOERR, "%s", o_filename);
754			}
755		} else {
756			if (sb.st_mode & S_IFDIR)
757				o_directory = 1;
758		}
759	}
760
761	/* check if output is to a tty (for progress report) */
762	v_tty = isatty(STDERR_FILENO);
763	r = 0;
764
765	/* authentication */
766	if (v_tty)
767		fetchAuthMethod = query_auth;
768
769	while (argc) {
770		if ((p = strrchr(*argv, '/')) == NULL)
771			p = *argv;
772		else
773			p++;
774
775		if (!*p)
776			p = "fetch.out";
777
778		fetchLastErrCode = 0;
779
780		if (o_flag) {
781			if (o_stdout) {
782				e = fetch(*argv, "-");
783			} else if (o_directory) {
784				asprintf(&q, "%s/%s", o_filename, p);
785				e = fetch(*argv, q);
786				free(q);
787			} else {
788				e = fetch(*argv, o_filename);
789			}
790		} else {
791			e = fetch(*argv, p);
792		}
793
794		if (sigint)
795			kill(getpid(), SIGINT);
796
797		if (e == 0 && once_flag)
798			exit(0);
799
800		if (e) {
801			r = 1;
802			if ((fetchLastErrCode
803			    && fetchLastErrCode != FETCH_UNAVAIL
804			    && fetchLastErrCode != FETCH_MOVED
805			    && fetchLastErrCode != FETCH_URL
806			    && fetchLastErrCode != FETCH_RESOLV
807			    && fetchLastErrCode != FETCH_UNKNOWN)) {
808				if (w_secs && v_level)
809					fprintf(stderr, "Waiting %d seconds "
810					    "before retrying\n", w_secs);
811				if (w_secs)
812					sleep(w_secs);
813				if (a_flag)
814					continue;
815			}
816		}
817
818		argc--, argv++;
819	}
820
821	exit(r);
822}
823