1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2000-2014 Dag-Erling Smørgrav
5 * Copyright (c) 2013 Michael Gmelin <[email protected]>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer
13 * in this position and unchanged.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
34
35 #include <sys/param.h>
36 #include <sys/socket.h>
37 #include <sys/stat.h>
38 #include <sys/time.h>
39
40 #include <ctype.h>
41 #include <err.h>
42 #include <errno.h>
43 #include <getopt.h>
44 #include <signal.h>
45 #include <stdint.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <termios.h>
50 #include <unistd.h>
51
52 #include <fetch.h>
53
54 #define MINBUFSIZE 16384
55 #define TIMEOUT 120
56
57 /* Option flags */
58 static int A_flag; /* -A: do not follow 302 redirects */
59 static int a_flag; /* -a: auto retry */
60 static off_t B_size; /* -B: buffer size */
61 static int b_flag; /*! -b: workaround TCP bug */
62 static char *c_dirname; /* -c: remote directory */
63 static int d_flag; /* -d: direct connection */
64 static int F_flag; /* -F: restart without checking mtime */
65 static char *f_filename; /* -f: file to fetch */
66 static char *h_hostname; /* -h: host to fetch from */
67 static int i_flag; /* -i: specify file for mtime comparison */
68 static char *i_filename; /* name of input file */
69 static int l_flag; /* -l: link rather than copy file: URLs */
70 static int m_flag; /* -[Mm]: mirror mode */
71 static char *N_filename; /* -N: netrc file name */
72 static int n_flag; /* -n: do not preserve modification time */
73 static int o_flag; /* -o: specify output file */
74 static int o_directory; /* output file is a directory */
75 static char *o_filename; /* name of output file */
76 static int o_stdout; /* output file is stdout */
77 static int once_flag; /* -1: stop at first successful file */
78 static int p_flag; /* -[Pp]: use passive FTP */
79 static int R_flag; /* -R: don't delete partial files */
80 static int r_flag; /* -r: restart previous transfer */
81 static off_t S_size; /* -S: require size to match */
82 static int s_flag; /* -s: show size, don't fetch */
83 static long T_secs; /* -T: transfer timeout in seconds */
84 static int t_flag; /*! -t: workaround TCP bug */
85 static int U_flag; /* -U: do not use high ports */
86 static int v_level = 1; /* -v: verbosity level */
87 static int v_tty; /* stdout is a tty */
88 static int v_progress; /* whether to display progress */
89 static pid_t pgrp; /* our process group */
90 static long w_secs; /* -w: retry delay */
91 static int family = PF_UNSPEC; /* -[46]: address family to use */
92
93 static int sigalrm; /* SIGALRM received */
94 static int siginfo; /* SIGINFO received */
95 static int sigint; /* SIGINT received */
96
97 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */
98 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */
99 static char *buf; /* transfer buffer */
100
101 enum options
102 {
103 OPTION_BIND_ADDRESS,
104 OPTION_NO_FTP_PASSIVE_MODE,
105 OPTION_HTTP_REFERER,
106 OPTION_HTTP_USER_AGENT,
107 OPTION_NO_PROXY,
108 OPTION_SSL_CA_CERT_FILE,
109 OPTION_SSL_CA_CERT_PATH,
110 OPTION_SSL_CLIENT_CERT_FILE,
111 OPTION_SSL_CLIENT_KEY_FILE,
112 OPTION_SSL_CRL_FILE,
113 OPTION_SSL_NO_SSL3,
114 OPTION_SSL_NO_TLS1,
115 OPTION_SSL_NO_VERIFY_HOSTNAME,
116 OPTION_SSL_NO_VERIFY_PEER
117 };
118
119
120 static struct option longopts[] =
121 {
122 /* mapping to single character argument */
123 { "one-file", no_argument, NULL, '1' },
124 { "ipv4-only", no_argument, NULL, '4' },
125 { "ipv6-only", no_argument, NULL, '6' },
126 { "no-redirect", no_argument, NULL, 'A' },
127 { "retry", no_argument, NULL, 'a' },
128 { "buffer-size", required_argument, NULL, 'B' },
129 /* -c not mapped, since it's deprecated */
130 { "direct", no_argument, NULL, 'd' },
131 { "force-restart", no_argument, NULL, 'F' },
132 /* -f not mapped, since it's deprecated */
133 /* -h not mapped, since it's deprecated */
134 { "if-modified-since", required_argument, NULL, 'i' },
135 { "symlink", no_argument, NULL, 'l' },
136 /* -M not mapped since it's the same as -m */
137 { "mirror", no_argument, NULL, 'm' },
138 { "netrc", required_argument, NULL, 'N' },
139 { "no-mtime", no_argument, NULL, 'n' },
140 { "output", required_argument, NULL, 'o' },
141 /* -P not mapped since it's the same as -p */
142 { "passive", no_argument, NULL, 'p' },
143 { "quiet", no_argument, NULL, 'q' },
144 { "keep-output", no_argument, NULL, 'R' },
145 { "restart", no_argument, NULL, 'r' },
146 { "require-size", required_argument, NULL, 'S' },
147 { "print-size", no_argument, NULL, 's' },
148 { "timeout", required_argument, NULL, 'T' },
149 { "passive-portrange-default", no_argument, NULL, 'T' },
150 { "verbose", no_argument, NULL, 'v' },
151 { "retry-delay", required_argument, NULL, 'w' },
152
153 /* options without a single character equivalent */
154 { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS },
155 { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE },
156 { "referer", required_argument, NULL, OPTION_HTTP_REFERER },
157 { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT },
158 { "no-proxy", required_argument, NULL, OPTION_NO_PROXY },
159 { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE },
160 { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH },
161 { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE },
162 { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE },
163 { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE },
164 { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 },
165 { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 },
166 { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME },
167 { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER },
168
169 { NULL, 0, NULL, 0 }
170 };
171
172 /*
173 * Signal handler
174 */
175 static void
sig_handler(int sig)176 sig_handler(int sig)
177 {
178 switch (sig) {
179 case SIGALRM:
180 sigalrm = 1;
181 break;
182 case SIGINFO:
183 siginfo = 1;
184 break;
185 case SIGINT:
186 sigint = 1;
187 break;
188 }
189 }
190
191 struct xferstat {
192 char name[64];
193 struct timeval start; /* start of transfer */
194 struct timeval last; /* time of last update */
195 struct timeval last2; /* time of previous last update */
196 off_t size; /* size of file per HTTP hdr */
197 off_t offset; /* starting offset in file */
198 off_t rcvd; /* bytes already received */
199 off_t lastrcvd; /* bytes received since last update */
200 };
201
202 /*
203 * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs
204 * depending on its magnitude
205 */
206 static void
stat_seconds(char * str,size_t strsz,long seconds)207 stat_seconds(char *str, size_t strsz, long seconds)
208 {
209
210 if (seconds > 86400)
211 snprintf(str, strsz, "%02ldd%02ldh",
212 seconds / 86400, (seconds % 86400) / 3600);
213 else if (seconds > 3600)
214 snprintf(str, strsz, "%02ldh%02ldm",
215 seconds / 3600, (seconds % 3600) / 60);
216 else if (seconds > 60)
217 snprintf(str, strsz, "%02ldm%02lds",
218 seconds / 60, seconds % 60);
219 else
220 snprintf(str, strsz, " %02lds",
221 seconds);
222 }
223
224 /*
225 * Compute and display ETA
226 */
227 static void
stat_eta(char * str,size_t strsz,const struct xferstat * xs)228 stat_eta(char *str, size_t strsz, const struct xferstat *xs)
229 {
230 long elapsed, eta;
231 off_t received, expected;
232
233 elapsed = xs->last.tv_sec - xs->start.tv_sec;
234 received = xs->rcvd - xs->offset;
235 expected = xs->size - xs->rcvd;
236 eta = (long)((double)elapsed * expected / received);
237 if (eta > 0)
238 stat_seconds(str, strsz, eta);
239 else
240 stat_seconds(str, strsz, elapsed);
241 }
242
243 /*
244 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'...
245 */
246 static const char *prefixes = " kMGTP";
247 static void
stat_bytes(char * str,size_t strsz,off_t bytes)248 stat_bytes(char *str, size_t strsz, off_t bytes)
249 {
250 const char *prefix = prefixes;
251
252 while (bytes > 9999 && prefix[1] != '\0') {
253 bytes /= 1024;
254 prefix++;
255 }
256 snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix);
257 }
258
259 /*
260 * Compute and display transfer rate
261 */
262 static void
stat_bps(char * str,size_t strsz,struct xferstat * xs)263 stat_bps(char *str, size_t strsz, struct xferstat *xs)
264 {
265 char bytes[16];
266 double delta, bps;
267
268 delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6))
269 - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6));
270
271 if (delta == 0.0) {
272 snprintf(str, strsz, "?? Bps");
273 } else {
274 bps = (xs->rcvd - xs->lastrcvd) / delta;
275 stat_bytes(bytes, sizeof bytes, (off_t)bps);
276 snprintf(str, strsz, "%sps", bytes);
277 }
278 }
279
280 /*
281 * Update the stats display
282 */
283 static void
stat_display(struct xferstat * xs,int force)284 stat_display(struct xferstat *xs, int force)
285 {
286 char bytes[16], bps[16], eta[16];
287 struct timeval now;
288 int ctty_pgrp;
289
290 /* check if we're the foreground process */
291 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 ||
292 (pid_t)ctty_pgrp != pgrp)
293 return;
294
295 gettimeofday(&now, NULL);
296 if (!force && now.tv_sec <= xs->last.tv_sec)
297 return;
298 xs->last2 = xs->last;
299 xs->last = now;
300
301 fprintf(stderr, "\r%-46.46s", xs->name);
302 if (xs->rcvd >= xs->size) {
303 stat_bytes(bytes, sizeof bytes, xs->rcvd);
304 setproctitle("%s [%s]", xs->name, bytes);
305 fprintf(stderr, " %s", bytes);
306 } else {
307 stat_bytes(bytes, sizeof bytes, xs->size);
308 setproctitle("%s [%d%% of %s]", xs->name,
309 (int)((100.0 * xs->rcvd) / xs->size),
310 bytes);
311 fprintf(stderr, "%3d%% of %s",
312 (int)((100.0 * xs->rcvd) / xs->size),
313 bytes);
314 }
315 if (force == 2) {
316 xs->lastrcvd = xs->offset;
317 xs->last2 = xs->start;
318 }
319 stat_bps(bps, sizeof bps, xs);
320 fprintf(stderr, " %s", bps);
321 if ((xs->size > 0 && xs->rcvd > 0 &&
322 xs->last.tv_sec >= xs->start.tv_sec + 3) ||
323 force == 2) {
324 stat_eta(eta, sizeof eta, xs);
325 fprintf(stderr, " %s", eta);
326 }
327 xs->lastrcvd = xs->rcvd;
328 }
329
330 /*
331 * Initialize the transfer statistics
332 */
333 static void
stat_start(struct xferstat * xs,const char * name,off_t size,off_t offset)334 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset)
335 {
336
337 memset(xs, 0, sizeof *xs);
338 snprintf(xs->name, sizeof xs->name, "%s", name);
339 gettimeofday(&xs->start, NULL);
340 xs->last2 = xs->last = xs->start;
341 xs->size = size;
342 xs->offset = offset;
343 xs->rcvd = offset;
344 xs->lastrcvd = offset;
345 if (v_progress)
346 stat_display(xs, 1);
347 else if (v_level > 0)
348 fprintf(stderr, "%-46s", xs->name);
349 }
350
351 /*
352 * Update the transfer statistics
353 */
354 static void
stat_update(struct xferstat * xs,off_t rcvd)355 stat_update(struct xferstat *xs, off_t rcvd)
356 {
357
358 xs->rcvd = rcvd;
359 if (v_progress)
360 stat_display(xs, 0);
361 }
362
363 /*
364 * Finalize the transfer statistics
365 */
366 static void
stat_end(struct xferstat * xs)367 stat_end(struct xferstat *xs)
368 {
369 char bytes[16], bps[16], eta[16];
370
371 gettimeofday(&xs->last, NULL);
372 if (v_progress) {
373 stat_display(xs, 2);
374 putc('\n', stderr);
375 } else if (v_level > 0) {
376 stat_bytes(bytes, sizeof bytes, xs->rcvd);
377 stat_bps(bps, sizeof bps, xs);
378 stat_eta(eta, sizeof eta, xs);
379 fprintf(stderr, " %s %s %s\n", bytes, bps, eta);
380 }
381 }
382
383 /*
384 * Ask the user for authentication details
385 */
386 static int
query_auth(struct url * URL)387 query_auth(struct url *URL)
388 {
389 struct termios tios;
390 tcflag_t saved_flags;
391 int i, nopwd;
392
393 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n",
394 URL->scheme, URL->host, URL->port);
395
396 fprintf(stderr, "Login: ");
397 if (fgets(URL->user, sizeof URL->user, stdin) == NULL)
398 return (-1);
399 for (i = strlen(URL->user); i >= 0; --i)
400 if (URL->user[i] == '\r' || URL->user[i] == '\n')
401 URL->user[i] = '\0';
402
403 fprintf(stderr, "Password: ");
404 if (tcgetattr(STDIN_FILENO, &tios) == 0) {
405 saved_flags = tios.c_lflag;
406 tios.c_lflag &= ~ECHO;
407 tios.c_lflag |= ECHONL|ICANON;
408 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios);
409 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
410 tios.c_lflag = saved_flags;
411 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios);
412 } else {
413 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
414 }
415 if (nopwd)
416 return (-1);
417 for (i = strlen(URL->pwd); i >= 0; --i)
418 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n')
419 URL->pwd[i] = '\0';
420
421 return (0);
422 }
423
424 /*
425 * Fetch a file
426 */
427 static int
fetch(char * URL,const char * path)428 fetch(char *URL, const char *path)
429 {
430 struct url *url;
431 struct url_stat us;
432 struct stat sb, nsb;
433 struct xferstat xs;
434 FILE *f, *of;
435 size_t size, readcnt, wr;
436 off_t count;
437 char flags[8];
438 const char *slash;
439 char *tmppath;
440 int r;
441 unsigned timeout;
442 char *ptr;
443
444 f = of = NULL;
445 tmppath = NULL;
446
447 timeout = 0;
448 *flags = 0;
449 count = 0;
450
451 /* set verbosity level */
452 if (v_level > 1)
453 strcat(flags, "v");
454 if (v_level > 2)
455 fetchDebug = 1;
456
457 /* parse URL */
458 url = NULL;
459 if (*URL == '\0') {
460 warnx("empty URL");
461 goto failure;
462 }
463 if ((url = fetchParseURL(URL)) == NULL) {
464 warnx("%s: parse error", URL);
465 goto failure;
466 }
467
468 /* if no scheme was specified, take a guess */
469 if (!*url->scheme) {
470 if (!*url->host)
471 strcpy(url->scheme, SCHEME_FILE);
472 else if (strncasecmp(url->host, "ftp.", 4) == 0)
473 strcpy(url->scheme, SCHEME_FTP);
474 else if (strncasecmp(url->host, "www.", 4) == 0)
475 strcpy(url->scheme, SCHEME_HTTP);
476 }
477
478 /* common flags */
479 switch (family) {
480 case PF_INET:
481 strcat(flags, "4");
482 break;
483 case PF_INET6:
484 strcat(flags, "6");
485 break;
486 }
487
488 /* FTP specific flags */
489 if (strcmp(url->scheme, SCHEME_FTP) == 0) {
490 if (p_flag)
491 strcat(flags, "p");
492 if (d_flag)
493 strcat(flags, "d");
494 if (U_flag)
495 strcat(flags, "l");
496 timeout = T_secs ? T_secs : ftp_timeout;
497 }
498
499 /* HTTP specific flags */
500 if (strcmp(url->scheme, SCHEME_HTTP) == 0 ||
501 strcmp(url->scheme, SCHEME_HTTPS) == 0) {
502 if (d_flag)
503 strcat(flags, "d");
504 if (A_flag)
505 strcat(flags, "A");
506 timeout = T_secs ? T_secs : http_timeout;
507 if (i_flag) {
508 if (stat(i_filename, &sb)) {
509 warn("%s: stat()", i_filename);
510 goto failure;
511 }
512 url->ims_time = sb.st_mtime;
513 strcat(flags, "i");
514 }
515 }
516
517 /* set the protocol timeout. */
518 fetchTimeout = timeout;
519
520 /* just print size */
521 if (s_flag) {
522 if (timeout)
523 alarm(timeout);
524 r = fetchStat(url, &us, flags);
525 if (timeout)
526 alarm(0);
527 if (sigalrm || sigint)
528 goto signal;
529 if (r == -1) {
530 warnx("%s", fetchLastErrString);
531 goto failure;
532 }
533 if (us.size == -1)
534 printf("Unknown\n");
535 else
536 printf("%jd\n", (intmax_t)us.size);
537 goto success;
538 }
539
540 /*
541 * If the -r flag was specified, we have to compare the local
542 * and remote files, so we should really do a fetchStat()
543 * first, but I know of at least one HTTP server that only
544 * sends the content size in response to GET requests, and
545 * leaves it out of replies to HEAD requests. Also, in the
546 * (frequent) case that the local and remote files match but
547 * the local file is truncated, we have sufficient information
548 * before the compare to issue a correct request. Therefore,
549 * we always issue a GET request as if we were sure the local
550 * file was a truncated copy of the remote file; we can drop
551 * the connection later if we change our minds.
552 */
553 sb.st_size = -1;
554 if (!o_stdout) {
555 r = stat(path, &sb);
556 if (r == 0 && r_flag && S_ISREG(sb.st_mode)) {
557 url->offset = sb.st_size;
558 } else if (r == -1 || !S_ISREG(sb.st_mode)) {
559 /*
560 * Whatever value sb.st_size has now is either
561 * wrong (if stat(2) failed) or irrelevant (if the
562 * path does not refer to a regular file)
563 */
564 sb.st_size = -1;
565 }
566 if (r == -1 && errno != ENOENT) {
567 warnx("%s: stat()", path);
568 goto failure;
569 }
570 }
571
572 /* start the transfer */
573 if (timeout)
574 alarm(timeout);
575 f = fetchXGet(url, &us, flags);
576 if (timeout)
577 alarm(0);
578 if (sigalrm || sigint)
579 goto signal;
580 if (f == NULL) {
581 warnx("%s: %s", URL, fetchLastErrString);
582 if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 ||
583 strcmp(url->scheme, SCHEME_HTTPS) == 0) &&
584 fetchLastErrCode == FETCH_OK &&
585 strcmp(fetchLastErrString, "Not Modified") == 0) {
586 /* HTTP Not Modified Response, return OK. */
587 r = 0;
588 goto done;
589 } else
590 goto failure;
591 }
592 if (sigint)
593 goto signal;
594
595 /* check that size is as expected */
596 if (S_size) {
597 if (us.size == -1) {
598 warnx("%s: size unknown", URL);
599 } else if (us.size != S_size) {
600 warnx("%s: size mismatch: expected %jd, actual %jd",
601 URL, (intmax_t)S_size, (intmax_t)us.size);
602 goto failure;
603 }
604 }
605
606 /* symlink instead of copy */
607 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) {
608 if (symlink(url->doc, path) == -1) {
609 warn("%s: symlink()", path);
610 goto failure;
611 }
612 goto success;
613 }
614
615 if (us.size == -1 && !o_stdout && v_level > 0)
616 warnx("%s: size of remote file is not known", URL);
617 if (v_level > 1) {
618 if (sb.st_size != -1)
619 fprintf(stderr, "local size / mtime: %jd / %ld\n",
620 (intmax_t)sb.st_size, (long)sb.st_mtime);
621 if (us.size != -1)
622 fprintf(stderr, "remote size / mtime: %jd / %ld\n",
623 (intmax_t)us.size, (long)us.mtime);
624 }
625
626 /* open output file */
627 if (o_stdout) {
628 /* output to stdout */
629 of = stdout;
630 } else if (r_flag && sb.st_size != -1) {
631 /* resume mode, local file exists */
632 if (!F_flag && us.mtime && sb.st_mtime != us.mtime) {
633 /* no match! have to refetch */
634 fclose(f);
635 /* if precious, warn the user and give up */
636 if (R_flag) {
637 warnx("%s: local modification time "
638 "does not match remote", path);
639 goto failure_keep;
640 }
641 } else if (url->offset > sb.st_size) {
642 /* gap between what we asked for and what we got */
643 warnx("%s: gap in resume mode", URL);
644 fclose(of);
645 of = NULL;
646 /* picked up again later */
647 } else if (us.size != -1) {
648 if (us.size == sb.st_size)
649 /* nothing to do */
650 goto success;
651 if (sb.st_size > us.size) {
652 /* local file too long! */
653 warnx("%s: local file (%jd bytes) is longer "
654 "than remote file (%jd bytes)", path,
655 (intmax_t)sb.st_size, (intmax_t)us.size);
656 goto failure;
657 }
658 /* we got it, open local file */
659 if ((of = fopen(path, "r+")) == NULL) {
660 warn("%s: fopen()", path);
661 goto failure;
662 }
663 /* check that it didn't move under our feet */
664 if (fstat(fileno(of), &nsb) == -1) {
665 /* can't happen! */
666 warn("%s: fstat()", path);
667 goto failure;
668 }
669 if (nsb.st_dev != sb.st_dev ||
670 nsb.st_ino != sb.st_ino ||
671 nsb.st_size != sb.st_size) {
672 warnx("%s: file has changed", URL);
673 fclose(of);
674 of = NULL;
675 sb = nsb;
676 /* picked up again later */
677 }
678 }
679 /* seek to where we left off */
680 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) {
681 warn("%s: fseeko()", path);
682 fclose(of);
683 of = NULL;
684 /* picked up again later */
685 }
686 } else if (m_flag && sb.st_size != -1) {
687 /* mirror mode, local file exists */
688 if (sb.st_size == us.size && sb.st_mtime == us.mtime)
689 goto success;
690 }
691
692 if (of == NULL) {
693 /*
694 * We don't yet have an output file; either this is a
695 * vanilla run with no special flags, or the local and
696 * remote files didn't match.
697 */
698
699 if (url->offset > 0) {
700 /*
701 * We tried to restart a transfer, but for
702 * some reason gave up - so we have to restart
703 * from scratch if we want the whole file
704 */
705 url->offset = 0;
706 if ((f = fetchXGet(url, &us, flags)) == NULL) {
707 warnx("%s: %s", URL, fetchLastErrString);
708 goto failure;
709 }
710 if (sigint)
711 goto signal;
712 }
713
714 /* construct a temp file name */
715 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) {
716 if ((slash = strrchr(path, '/')) == NULL)
717 slash = path;
718 else
719 ++slash;
720 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s",
721 (int)(slash - path), path, slash);
722 if (tmppath != NULL) {
723 if (mkstemps(tmppath, strlen(slash) + 1) == -1) {
724 warn("%s: mkstemps()", path);
725 goto failure;
726 }
727 of = fopen(tmppath, "w");
728 chown(tmppath, sb.st_uid, sb.st_gid);
729 chmod(tmppath, sb.st_mode & ALLPERMS);
730 }
731 }
732 if (of == NULL)
733 of = fopen(path, "w");
734 if (of == NULL) {
735 warn("%s: open()", path);
736 goto failure;
737 }
738 }
739 count = url->offset;
740
741 /* start the counter */
742 stat_start(&xs, path, us.size, count);
743
744 sigalrm = siginfo = sigint = 0;
745
746 /* suck in the data */
747 setvbuf(f, NULL, _IOFBF, B_size);
748 signal(SIGINFO, sig_handler);
749 while (!sigint) {
750 if (us.size != -1 && us.size - count < B_size &&
751 us.size - count >= 0)
752 size = us.size - count;
753 else
754 size = B_size;
755 if (siginfo) {
756 stat_end(&xs);
757 siginfo = 0;
758 }
759
760 if (size == 0)
761 break;
762
763 if ((readcnt = fread(buf, 1, size, f)) < size) {
764 if (ferror(f) && errno == EINTR && !sigint)
765 clearerr(f);
766 else if (readcnt == 0)
767 break;
768 }
769
770 stat_update(&xs, count += readcnt);
771 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr)
772 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) {
773 if (ferror(of) && errno == EINTR && !sigint)
774 clearerr(of);
775 else
776 break;
777 }
778 if (readcnt != 0)
779 break;
780 }
781 if (!sigalrm)
782 sigalrm = ferror(f) && errno == ETIMEDOUT;
783 signal(SIGINFO, SIG_DFL);
784
785 stat_end(&xs);
786
787 /*
788 * If the transfer timed out or was interrupted, we still want to
789 * set the mtime in case the file is not removed (-r or -R) and
790 * the user later restarts the transfer.
791 */
792 signal:
793 /* set mtime of local file */
794 if (!n_flag && us.mtime && !o_stdout && of != NULL &&
795 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) {
796 struct timeval tv[2];
797
798 fflush(of);
799 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime);
800 tv[1].tv_sec = (long)us.mtime;
801 tv[0].tv_usec = tv[1].tv_usec = 0;
802 if (utimes(tmppath ? tmppath : path, tv))
803 warn("%s: utimes()", tmppath ? tmppath : path);
804 }
805
806 /* timed out or interrupted? */
807 if (sigalrm)
808 warnx("transfer timed out");
809 if (sigint) {
810 warnx("transfer interrupted");
811 goto failure;
812 }
813
814 /* timeout / interrupt before connection completley established? */
815 if (f == NULL)
816 goto failure;
817
818 if (!sigalrm) {
819 /* check the status of our files */
820 if (ferror(f))
821 warn("%s", URL);
822 if (ferror(of))
823 warn("%s", path);
824 if (ferror(f) || ferror(of))
825 goto failure;
826 }
827
828 /* did the transfer complete normally? */
829 if (us.size != -1 && count < us.size) {
830 warnx("%s appears to be truncated: %jd/%jd bytes",
831 path, (intmax_t)count, (intmax_t)us.size);
832 goto failure_keep;
833 }
834
835 /*
836 * If the transfer timed out and we didn't know how much to
837 * expect, assume the worst (i.e. we didn't get all of it)
838 */
839 if (sigalrm && us.size == -1) {
840 warnx("%s may be truncated", path);
841 goto failure_keep;
842 }
843
844 success:
845 r = 0;
846 if (tmppath != NULL && rename(tmppath, path) == -1) {
847 warn("%s: rename()", path);
848 goto failure_keep;
849 }
850 goto done;
851 failure:
852 if (of && of != stdout && !R_flag && !r_flag)
853 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG))
854 unlink(tmppath ? tmppath : path);
855 if (R_flag && tmppath != NULL && sb.st_size == -1)
856 rename(tmppath, path); /* ignore errors here */
857 failure_keep:
858 r = -1;
859 goto done;
860 done:
861 if (f)
862 fclose(f);
863 if (of && of != stdout)
864 fclose(of);
865 if (url)
866 fetchFreeURL(url);
867 if (tmppath != NULL)
868 free(tmppath);
869 return (r);
870 }
871
872 static void
usage(void)873 usage(void)
874 {
875 fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
876 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]",
877 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]",
878 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]",
879 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]",
880 " [-o file] [--referer=URL] [-S bytes] [-T seconds]",
881 " [--user-agent=agent-string] [-w seconds] URL ...",
882 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]",
883 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]",
884 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]",
885 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]",
886 " [-o file] [--referer=URL] [-S bytes] [-T seconds]",
887 " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]");
888 }
889
890
891 /*
892 * Entry point
893 */
894 int
main(int argc,char * argv[])895 main(int argc, char *argv[])
896 {
897 struct stat sb;
898 struct sigaction sa;
899 const char *p, *s;
900 char *end, *q;
901 int c, e, r;
902
903
904 while ((c = getopt_long(argc, argv,
905 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:",
906 longopts, NULL)) != -1)
907 switch (c) {
908 case '1':
909 once_flag = 1;
910 break;
911 case '4':
912 family = PF_INET;
913 break;
914 case '6':
915 family = PF_INET6;
916 break;
917 case 'A':
918 A_flag = 1;
919 break;
920 case 'a':
921 a_flag = 1;
922 break;
923 case 'B':
924 B_size = (off_t)strtol(optarg, &end, 10);
925 if (*optarg == '\0' || *end != '\0')
926 errx(1, "invalid buffer size (%s)", optarg);
927 break;
928 case 'b':
929 warnx("warning: the -b option is deprecated");
930 b_flag = 1;
931 break;
932 case 'c':
933 c_dirname = optarg;
934 break;
935 case 'd':
936 d_flag = 1;
937 break;
938 case 'F':
939 F_flag = 1;
940 break;
941 case 'f':
942 f_filename = optarg;
943 break;
944 case 'H':
945 warnx("the -H option is now implicit, "
946 "use -U to disable");
947 break;
948 case 'h':
949 h_hostname = optarg;
950 break;
951 case 'i':
952 i_flag = 1;
953 i_filename = optarg;
954 break;
955 case 'l':
956 l_flag = 1;
957 break;
958 case 'o':
959 o_flag = 1;
960 o_filename = optarg;
961 break;
962 case 'M':
963 case 'm':
964 if (r_flag)
965 errx(1, "the -m and -r flags "
966 "are mutually exclusive");
967 m_flag = 1;
968 break;
969 case 'N':
970 N_filename = optarg;
971 break;
972 case 'n':
973 n_flag = 1;
974 break;
975 case 'P':
976 case 'p':
977 p_flag = 1;
978 break;
979 case 'q':
980 v_level = 0;
981 break;
982 case 'R':
983 R_flag = 1;
984 break;
985 case 'r':
986 if (m_flag)
987 errx(1, "the -m and -r flags "
988 "are mutually exclusive");
989 r_flag = 1;
990 break;
991 case 'S':
992 S_size = (off_t)strtol(optarg, &end, 10);
993 if (*optarg == '\0' || *end != '\0')
994 errx(1, "invalid size (%s)", optarg);
995 break;
996 case 's':
997 s_flag = 1;
998 break;
999 case 'T':
1000 T_secs = strtol(optarg, &end, 10);
1001 if (*optarg == '\0' || *end != '\0')
1002 errx(1, "invalid timeout (%s)", optarg);
1003 break;
1004 case 't':
1005 t_flag = 1;
1006 warnx("warning: the -t option is deprecated");
1007 break;
1008 case 'U':
1009 U_flag = 1;
1010 break;
1011 case 'v':
1012 v_level++;
1013 break;
1014 case 'w':
1015 a_flag = 1;
1016 w_secs = strtol(optarg, &end, 10);
1017 if (*optarg == '\0' || *end != '\0')
1018 errx(1, "invalid delay (%s)", optarg);
1019 break;
1020 case OPTION_BIND_ADDRESS:
1021 setenv("FETCH_BIND_ADDRESS", optarg, 1);
1022 break;
1023 case OPTION_NO_FTP_PASSIVE_MODE:
1024 setenv("FTP_PASSIVE_MODE", "no", 1);
1025 break;
1026 case OPTION_HTTP_REFERER:
1027 setenv("HTTP_REFERER", optarg, 1);
1028 break;
1029 case OPTION_HTTP_USER_AGENT:
1030 setenv("HTTP_USER_AGENT", optarg, 1);
1031 break;
1032 case OPTION_NO_PROXY:
1033 setenv("NO_PROXY", optarg, 1);
1034 break;
1035 case OPTION_SSL_CA_CERT_FILE:
1036 setenv("SSL_CA_CERT_FILE", optarg, 1);
1037 break;
1038 case OPTION_SSL_CA_CERT_PATH:
1039 setenv("SSL_CA_CERT_PATH", optarg, 1);
1040 break;
1041 case OPTION_SSL_CLIENT_CERT_FILE:
1042 setenv("SSL_CLIENT_CERT_FILE", optarg, 1);
1043 break;
1044 case OPTION_SSL_CLIENT_KEY_FILE:
1045 setenv("SSL_CLIENT_KEY_FILE", optarg, 1);
1046 break;
1047 case OPTION_SSL_CRL_FILE:
1048 setenv("SSL_CLIENT_CRL_FILE", optarg, 1);
1049 break;
1050 case OPTION_SSL_NO_SSL3:
1051 setenv("SSL_NO_SSL3", "", 1);
1052 break;
1053 case OPTION_SSL_NO_TLS1:
1054 setenv("SSL_NO_TLS1", "", 1);
1055 break;
1056 case OPTION_SSL_NO_VERIFY_HOSTNAME:
1057 setenv("SSL_NO_VERIFY_HOSTNAME", "", 1);
1058 break;
1059 case OPTION_SSL_NO_VERIFY_PEER:
1060 setenv("SSL_NO_VERIFY_PEER", "", 1);
1061 break;
1062 default:
1063 usage();
1064 exit(1);
1065 }
1066
1067 argc -= optind;
1068 argv += optind;
1069
1070 if (h_hostname || f_filename || c_dirname) {
1071 if (!h_hostname || !f_filename || argc) {
1072 usage();
1073 exit(1);
1074 }
1075 /* XXX this is a hack. */
1076 if (strcspn(h_hostname, "@:/") != strlen(h_hostname))
1077 errx(1, "invalid hostname");
1078 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname,
1079 c_dirname ? c_dirname : "", f_filename) == -1)
1080 errx(1, "%s", strerror(ENOMEM));
1081 argc++;
1082 }
1083
1084 if (!argc) {
1085 usage();
1086 exit(1);
1087 }
1088
1089 /* allocate buffer */
1090 if (B_size < MINBUFSIZE)
1091 B_size = MINBUFSIZE;
1092 if ((buf = malloc(B_size)) == NULL)
1093 errx(1, "%s", strerror(ENOMEM));
1094
1095 /* timeouts */
1096 if ((s = getenv("FTP_TIMEOUT")) != NULL) {
1097 ftp_timeout = strtol(s, &end, 10);
1098 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) {
1099 warnx("FTP_TIMEOUT (%s) is not a positive integer", s);
1100 ftp_timeout = 0;
1101 }
1102 }
1103 if ((s = getenv("HTTP_TIMEOUT")) != NULL) {
1104 http_timeout = strtol(s, &end, 10);
1105 if (*s == '\0' || *end != '\0' || http_timeout < 0) {
1106 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s);
1107 http_timeout = 0;
1108 }
1109 }
1110
1111 /* signal handling */
1112 sa.sa_flags = 0;
1113 sa.sa_handler = sig_handler;
1114 sigemptyset(&sa.sa_mask);
1115 sigaction(SIGALRM, &sa, NULL);
1116 sa.sa_flags = SA_RESETHAND;
1117 sigaction(SIGINT, &sa, NULL);
1118 fetchRestartCalls = 0;
1119
1120 /* output file */
1121 if (o_flag) {
1122 if (strcmp(o_filename, "-") == 0) {
1123 o_stdout = 1;
1124 } else if (stat(o_filename, &sb) == -1) {
1125 if (errno == ENOENT) {
1126 if (argc > 1)
1127 errx(1, "%s is not a directory",
1128 o_filename);
1129 } else {
1130 err(1, "%s", o_filename);
1131 }
1132 } else {
1133 if (sb.st_mode & S_IFDIR)
1134 o_directory = 1;
1135 }
1136 }
1137
1138 /* check if output is to a tty (for progress report) */
1139 v_tty = isatty(STDERR_FILENO);
1140 v_progress = v_tty && v_level > 0;
1141 if (v_progress)
1142 pgrp = getpgrp();
1143
1144 r = 0;
1145
1146 /* authentication */
1147 if (v_tty)
1148 fetchAuthMethod = query_auth;
1149 if (N_filename != NULL)
1150 if (setenv("NETRC", N_filename, 1) == -1)
1151 err(1, "setenv: cannot set NETRC=%s", N_filename);
1152
1153 while (argc) {
1154 if ((p = strrchr(*argv, '/')) == NULL)
1155 p = *argv;
1156 else
1157 p++;
1158
1159 if (!*p)
1160 p = "fetch.out";
1161
1162 fetchLastErrCode = 0;
1163
1164 if (o_flag) {
1165 if (o_stdout) {
1166 e = fetch(*argv, "-");
1167 } else if (o_directory) {
1168 asprintf(&q, "%s/%s", o_filename, p);
1169 e = fetch(*argv, q);
1170 free(q);
1171 } else {
1172 e = fetch(*argv, o_filename);
1173 }
1174 } else {
1175 e = fetch(*argv, p);
1176 }
1177
1178 if (sigint)
1179 kill(getpid(), SIGINT);
1180
1181 if (e == 0 && once_flag)
1182 exit(0);
1183
1184 if (e) {
1185 r = 1;
1186 if ((fetchLastErrCode
1187 && fetchLastErrCode != FETCH_UNAVAIL
1188 && fetchLastErrCode != FETCH_MOVED
1189 && fetchLastErrCode != FETCH_URL
1190 && fetchLastErrCode != FETCH_RESOLV
1191 && fetchLastErrCode != FETCH_UNKNOWN)) {
1192 if (w_secs && v_level)
1193 fprintf(stderr, "Waiting %ld seconds "
1194 "before retrying\n", w_secs);
1195 if (w_secs)
1196 sleep(w_secs);
1197 if (a_flag)
1198 continue;
1199 }
1200 }
1201
1202 argc--, argv++;
1203 }
1204
1205 exit(r);
1206 }
1207