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,int * is_http)428 fetch(char *URL, const char *path, int *is_http)
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, size_prev;
437 char flags[8];
438 const char *slash;
439 char *tmppath;
440 int r, tries;
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 /* for both of http and https */
479 *is_http = strncmp(url->scheme, "http", 4) == 0;
480
481 /* common flags */
482 switch (family) {
483 case PF_INET:
484 strcat(flags, "4");
485 break;
486 case PF_INET6:
487 strcat(flags, "6");
488 break;
489 }
490
491 /* FTP specific flags */
492 if (strcmp(url->scheme, SCHEME_FTP) == 0) {
493 if (p_flag)
494 strcat(flags, "p");
495 if (d_flag)
496 strcat(flags, "d");
497 if (U_flag)
498 strcat(flags, "l");
499 timeout = T_secs ? T_secs : ftp_timeout;
500 }
501
502 /* HTTP specific flags */
503 if (strcmp(url->scheme, SCHEME_HTTP) == 0 ||
504 strcmp(url->scheme, SCHEME_HTTPS) == 0) {
505 if (d_flag)
506 strcat(flags, "d");
507 if (A_flag)
508 strcat(flags, "A");
509 timeout = T_secs ? T_secs : http_timeout;
510 if (i_flag) {
511 if (stat(i_filename, &sb)) {
512 warn("%s: stat()", i_filename);
513 goto failure;
514 }
515 url->ims_time = sb.st_mtime;
516 strcat(flags, "i");
517 }
518 }
519
520 /* set the protocol timeout. */
521 fetchTimeout = timeout;
522
523 /* just print size */
524 if (s_flag) {
525 if (timeout)
526 alarm(timeout);
527 r = fetchStat(url, &us, flags);
528 if (timeout)
529 alarm(0);
530 if (sigalrm || sigint)
531 goto signal;
532 if (r == -1) {
533 warnx("%s", fetchLastErrString);
534 goto failure;
535 }
536 if (us.size == -1)
537 printf("Unknown\n");
538 else
539 printf("%jd\n", (intmax_t)us.size);
540 goto success;
541 }
542
543 tries = 1;
544 again:
545 r = 0;
546 /*
547 * If the -r flag was specified, we have to compare the local
548 * and remote files, so we should really do a fetchStat()
549 * first, but I know of at least one HTTP server that only
550 * sends the content size in response to GET requests, and
551 * leaves it out of replies to HEAD requests. Also, in the
552 * (frequent) case that the local and remote files match but
553 * the local file is truncated, we have sufficient information
554 * before the compare to issue a correct request. Therefore,
555 * we always issue a GET request as if we were sure the local
556 * file was a truncated copy of the remote file; we can drop
557 * the connection later if we change our minds.
558 */
559 sb.st_size = -1;
560 if (!o_stdout) {
561 r = stat(path, &sb);
562 if (r == 0 && (r_flag || tries > 1) && S_ISREG(sb.st_mode)) {
563 url->offset = sb.st_size;
564 } else if (r == -1 || !S_ISREG(sb.st_mode)) {
565 /*
566 * Whatever value sb.st_size has now is either
567 * wrong (if stat(2) failed) or irrelevant (if the
568 * path does not refer to a regular file)
569 */
570 sb.st_size = -1;
571 }
572 if (r == -1 && errno != ENOENT) {
573 warnx("%s: stat()", path);
574 goto failure;
575 }
576 }
577 size_prev = sb.st_size;
578
579 /* start the transfer */
580 if (timeout)
581 alarm(timeout);
582 f = fetchXGet(url, &us, flags);
583 if (timeout)
584 alarm(0);
585 if (sigalrm || sigint)
586 goto signal;
587 if (f == NULL) {
588 warnx("%s: %s", URL, fetchLastErrString);
589 if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 ||
590 strcmp(url->scheme, SCHEME_HTTPS) == 0) &&
591 fetchLastErrCode == FETCH_OK &&
592 strcmp(fetchLastErrString, "Not Modified") == 0) {
593 /* HTTP Not Modified Response, return OK. */
594 r = 0;
595 goto done;
596 } else
597 goto failure;
598 }
599 if (sigint)
600 goto signal;
601
602 /* check that size is as expected */
603 if (S_size) {
604 if (us.size == -1) {
605 warnx("%s: size unknown", URL);
606 } else if (us.size != S_size) {
607 warnx("%s: size mismatch: expected %jd, actual %jd",
608 URL, (intmax_t)S_size, (intmax_t)us.size);
609 goto failure;
610 }
611 }
612
613 /* symlink instead of copy */
614 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) {
615 if (symlink(url->doc, path) == -1) {
616 warn("%s: symlink()", path);
617 goto failure;
618 }
619 goto success;
620 }
621
622 if (us.size == -1 && !o_stdout && v_level > 0)
623 warnx("%s: size of remote file is not known", URL);
624 if (v_level > 1) {
625 if (sb.st_size != -1)
626 fprintf(stderr, "local size / mtime: %jd / %ld\n",
627 (intmax_t)sb.st_size, (long)sb.st_mtime);
628 if (us.size != -1)
629 fprintf(stderr, "remote size / mtime: %jd / %ld\n",
630 (intmax_t)us.size, (long)us.mtime);
631 }
632
633 /* open output file */
634 if (o_stdout) {
635 /* output to stdout */
636 of = stdout;
637 } else if (r_flag && sb.st_size != -1) {
638 /* resume mode, local file exists */
639 if (!F_flag && us.mtime && sb.st_mtime != us.mtime && tries == 1) {
640 /* no match! have to refetch */
641 fclose(f);
642 /* if precious, warn the user and give up */
643 if (R_flag) {
644 warnx("%s: local modification time "
645 "does not match remote", path);
646 goto failure_keep;
647 }
648 } else if (url->offset > sb.st_size) {
649 /* gap between what we asked for and what we got */
650 warnx("%s: gap in resume mode", URL);
651 fclose(of);
652 of = NULL;
653 /* picked up again later */
654 } else if (us.size != -1) {
655 if (us.size == sb.st_size)
656 /* nothing to do */
657 goto success;
658 if (sb.st_size > us.size) {
659 /* local file too long! */
660 warnx("%s: local file (%jd bytes) is longer "
661 "than remote file (%jd bytes)", path,
662 (intmax_t)sb.st_size, (intmax_t)us.size);
663 goto failure;
664 }
665 /* we got it, open local file */
666 if ((of = fopen(path, "r+")) == NULL) {
667 warn("%s: fopen()", path);
668 goto failure;
669 }
670 /* check that it didn't move under our feet */
671 if (fstat(fileno(of), &nsb) == -1) {
672 /* can't happen! */
673 warn("%s: fstat()", path);
674 goto failure;
675 }
676 if (nsb.st_dev != sb.st_dev ||
677 nsb.st_ino != sb.st_ino ||
678 nsb.st_size != sb.st_size) {
679 warnx("%s: file has changed", URL);
680 fclose(of);
681 of = NULL;
682 sb = nsb;
683 /* picked up again later */
684 }
685 }
686 /* seek to where we left off */
687 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) {
688 warn("%s: fseeko()", path);
689 fclose(of);
690 of = NULL;
691 /* picked up again later */
692 }
693 } else if (m_flag && sb.st_size != -1) {
694 /* mirror mode, local file exists */
695 if (sb.st_size == us.size && sb.st_mtime == us.mtime)
696 goto success;
697 }
698
699 if (of == NULL) {
700 /*
701 * We don't yet have an output file; either this is a
702 * vanilla run with no special flags, or the local and
703 * remote files didn't match.
704 */
705
706 if (url->offset > 0) {
707 /*
708 * We tried to restart a transfer, but for
709 * some reason gave up - so we have to restart
710 * from scratch if we want the whole file
711 */
712 url->offset = 0;
713 if ((f = fetchXGet(url, &us, flags)) == NULL) {
714 warnx("%s: %s", URL, fetchLastErrString);
715 goto failure;
716 }
717 if (sigint)
718 goto signal;
719 }
720
721 /* construct a temp file name */
722 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) {
723 if ((slash = strrchr(path, '/')) == NULL)
724 slash = path;
725 else
726 ++slash;
727 if(tmppath != NULL)
728 free(tmppath);
729 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s",
730 (int)(slash - path), path, slash);
731 if (tmppath != NULL) {
732 if (mkstemps(tmppath, strlen(slash) + 1) == -1) {
733 warn("%s: mkstemps()", path);
734 goto failure;
735 }
736 of = fopen(tmppath, "w");
737 chown(tmppath, sb.st_uid, sb.st_gid);
738 chmod(tmppath, sb.st_mode & ALLPERMS);
739 }
740 }
741 if (of == NULL)
742 of = fopen(path, "w");
743 if (of == NULL) {
744 warn("%s: open()", path);
745 goto failure;
746 }
747 }
748 count = url->offset;
749
750 /* start the counter */
751 stat_start(&xs, path, us.size, count);
752
753 sigalrm = siginfo = sigint = 0;
754
755 /* suck in the data */
756 setvbuf(f, NULL, _IOFBF, B_size);
757 signal(SIGINFO, sig_handler);
758 while (!sigint) {
759 if (us.size != -1 && us.size - count < B_size &&
760 us.size - count >= 0)
761 size = us.size - count;
762 else
763 size = B_size;
764 if (siginfo) {
765 stat_end(&xs);
766 siginfo = 0;
767 }
768
769 if (size == 0)
770 break;
771
772 if ((readcnt = fread(buf, 1, size, f)) < size) {
773 if (ferror(f) && errno == EINTR && !sigint)
774 clearerr(f);
775 else if (readcnt == 0)
776 break;
777 }
778
779 stat_update(&xs, count += readcnt);
780 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr)
781 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) {
782 if (ferror(of) && errno == EINTR && !sigint)
783 clearerr(of);
784 else
785 break;
786 }
787 if (readcnt != 0)
788 break;
789 }
790 if (!sigalrm)
791 sigalrm = ferror(f) && errno == ETIMEDOUT;
792 signal(SIGINFO, SIG_DFL);
793
794 stat_end(&xs);
795
796 /*
797 * If the transfer timed out or was interrupted, we still want to
798 * set the mtime in case the file is not removed (-r or -R) and
799 * the user later restarts the transfer.
800 */
801 signal:
802 /* set mtime of local file */
803 if (!n_flag && us.mtime && !o_stdout && of != NULL &&
804 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) {
805 struct timeval tv[2];
806
807 fflush(of);
808 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime);
809 tv[1].tv_sec = (long)us.mtime;
810 tv[0].tv_usec = tv[1].tv_usec = 0;
811 if (utimes(tmppath ? tmppath : path, tv))
812 warn("%s: utimes()", tmppath ? tmppath : path);
813 }
814
815 /* timed out or interrupted? */
816 if (sigalrm)
817 warnx("transfer timed out");
818 if (sigint) {
819 warnx("transfer interrupted");
820 goto failure;
821 }
822
823 /* timeout / interrupt before connection completley established? */
824 if (f == NULL)
825 goto failure;
826
827 if (!sigalrm) {
828 /* check the status of our files */
829 if (ferror(f))
830 warn("%s", URL);
831 if (ferror(of))
832 warn("%s", path);
833 if (ferror(f) || ferror(of))
834 goto failure;
835 }
836
837 /* did the transfer complete normally? */
838 if (us.size != -1 && count < us.size) {
839 warnx("%s appears to be truncated: %jd/%jd bytes",
840 path, (intmax_t)count, (intmax_t)us.size);
841 if(!o_stdout && a_flag && count > size_prev) {
842 fclose(f);
843 if (w_secs)
844 sleep(w_secs);
845 tries++;
846 goto again;
847 }
848 goto failure_keep;
849 }
850
851 /*
852 * If the transfer timed out and we didn't know how much to
853 * expect, assume the worst (i.e. we didn't get all of it)
854 */
855 if (sigalrm && us.size == -1) {
856 warnx("%s may be truncated", path);
857 goto failure_keep;
858 }
859
860 success:
861 r = 0;
862 if (tmppath != NULL && rename(tmppath, path) == -1) {
863 warn("%s: rename()", path);
864 goto failure_keep;
865 }
866 goto done;
867 failure:
868 if (of && of != stdout && !R_flag && !r_flag)
869 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG))
870 unlink(tmppath ? tmppath : path);
871 if (R_flag && tmppath != NULL && sb.st_size == -1)
872 rename(tmppath, path); /* ignore errors here */
873 failure_keep:
874 r = -1;
875 goto done;
876 done:
877 if (f)
878 fclose(f);
879 if (of && of != stdout)
880 fclose(of);
881 if (url)
882 fetchFreeURL(url);
883 if (tmppath != NULL)
884 free(tmppath);
885 return (r);
886 }
887
888 static void
usage(void)889 usage(void)
890 {
891 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",
892 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]",
893 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]",
894 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]",
895 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]",
896 " [-o file] [--referer=URL] [-S bytes] [-T seconds]",
897 " [--user-agent=agent-string] [-w seconds] URL ...",
898 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]",
899 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]",
900 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]",
901 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]",
902 " [-o file] [--referer=URL] [-S bytes] [-T seconds]",
903 " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]");
904 }
905
906
907 /*
908 * Entry point
909 */
910 int
main(int argc,char * argv[])911 main(int argc, char *argv[])
912 {
913 struct stat sb;
914 struct sigaction sa;
915 const char *p, *s;
916 char *end, *q;
917 int c, e, is_http, r;
918
919
920 while ((c = getopt_long(argc, argv,
921 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:",
922 longopts, NULL)) != -1)
923 switch (c) {
924 case '1':
925 once_flag = 1;
926 break;
927 case '4':
928 family = PF_INET;
929 break;
930 case '6':
931 family = PF_INET6;
932 break;
933 case 'A':
934 A_flag = 1;
935 break;
936 case 'a':
937 a_flag = 1;
938 break;
939 case 'B':
940 B_size = (off_t)strtol(optarg, &end, 10);
941 if (*optarg == '\0' || *end != '\0')
942 errx(1, "invalid buffer size (%s)", optarg);
943 break;
944 case 'b':
945 warnx("warning: the -b option is deprecated");
946 b_flag = 1;
947 break;
948 case 'c':
949 c_dirname = optarg;
950 break;
951 case 'd':
952 d_flag = 1;
953 break;
954 case 'F':
955 F_flag = 1;
956 break;
957 case 'f':
958 f_filename = optarg;
959 break;
960 case 'H':
961 warnx("the -H option is now implicit, "
962 "use -U to disable");
963 break;
964 case 'h':
965 h_hostname = optarg;
966 break;
967 case 'i':
968 i_flag = 1;
969 i_filename = optarg;
970 break;
971 case 'l':
972 l_flag = 1;
973 break;
974 case 'o':
975 o_flag = 1;
976 o_filename = optarg;
977 break;
978 case 'M':
979 case 'm':
980 if (r_flag)
981 errx(1, "the -m and -r flags "
982 "are mutually exclusive");
983 m_flag = 1;
984 break;
985 case 'N':
986 N_filename = optarg;
987 break;
988 case 'n':
989 n_flag = 1;
990 break;
991 case 'P':
992 case 'p':
993 p_flag = 1;
994 break;
995 case 'q':
996 v_level = 0;
997 break;
998 case 'R':
999 R_flag = 1;
1000 break;
1001 case 'r':
1002 if (m_flag)
1003 errx(1, "the -m and -r flags "
1004 "are mutually exclusive");
1005 r_flag = 1;
1006 break;
1007 case 'S':
1008 S_size = strtoll(optarg, &end, 10);
1009 if (*optarg == '\0' || *end != '\0')
1010 errx(1, "invalid size (%s)", optarg);
1011 break;
1012 case 's':
1013 s_flag = 1;
1014 break;
1015 case 'T':
1016 T_secs = strtol(optarg, &end, 10);
1017 if (*optarg == '\0' || *end != '\0')
1018 errx(1, "invalid timeout (%s)", optarg);
1019 break;
1020 case 't':
1021 t_flag = 1;
1022 warnx("warning: the -t option is deprecated");
1023 break;
1024 case 'U':
1025 U_flag = 1;
1026 break;
1027 case 'v':
1028 v_level++;
1029 break;
1030 case 'w':
1031 a_flag = 1;
1032 w_secs = strtol(optarg, &end, 10);
1033 if (*optarg == '\0' || *end != '\0')
1034 errx(1, "invalid delay (%s)", optarg);
1035 break;
1036 case OPTION_BIND_ADDRESS:
1037 setenv("FETCH_BIND_ADDRESS", optarg, 1);
1038 break;
1039 case OPTION_NO_FTP_PASSIVE_MODE:
1040 setenv("FTP_PASSIVE_MODE", "no", 1);
1041 break;
1042 case OPTION_HTTP_REFERER:
1043 setenv("HTTP_REFERER", optarg, 1);
1044 break;
1045 case OPTION_HTTP_USER_AGENT:
1046 setenv("HTTP_USER_AGENT", optarg, 1);
1047 break;
1048 case OPTION_NO_PROXY:
1049 setenv("NO_PROXY", optarg, 1);
1050 break;
1051 case OPTION_SSL_CA_CERT_FILE:
1052 setenv("SSL_CA_CERT_FILE", optarg, 1);
1053 break;
1054 case OPTION_SSL_CA_CERT_PATH:
1055 setenv("SSL_CA_CERT_PATH", optarg, 1);
1056 break;
1057 case OPTION_SSL_CLIENT_CERT_FILE:
1058 setenv("SSL_CLIENT_CERT_FILE", optarg, 1);
1059 break;
1060 case OPTION_SSL_CLIENT_KEY_FILE:
1061 setenv("SSL_CLIENT_KEY_FILE", optarg, 1);
1062 break;
1063 case OPTION_SSL_CRL_FILE:
1064 setenv("SSL_CLIENT_CRL_FILE", optarg, 1);
1065 break;
1066 case OPTION_SSL_NO_SSL3:
1067 setenv("SSL_NO_SSL3", "", 1);
1068 break;
1069 case OPTION_SSL_NO_TLS1:
1070 setenv("SSL_NO_TLS1", "", 1);
1071 break;
1072 case OPTION_SSL_NO_VERIFY_HOSTNAME:
1073 setenv("SSL_NO_VERIFY_HOSTNAME", "", 1);
1074 break;
1075 case OPTION_SSL_NO_VERIFY_PEER:
1076 setenv("SSL_NO_VERIFY_PEER", "", 1);
1077 break;
1078 default:
1079 usage();
1080 exit(1);
1081 }
1082
1083 argc -= optind;
1084 argv += optind;
1085
1086 if (h_hostname || f_filename || c_dirname) {
1087 if (!h_hostname || !f_filename || argc) {
1088 usage();
1089 exit(1);
1090 }
1091 /* XXX this is a hack. */
1092 if (strcspn(h_hostname, "@:/") != strlen(h_hostname))
1093 errx(1, "invalid hostname");
1094 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname,
1095 c_dirname ? c_dirname : "", f_filename) == -1)
1096 errx(1, "%s", strerror(ENOMEM));
1097 argc++;
1098 }
1099
1100 if (!argc) {
1101 usage();
1102 exit(1);
1103 }
1104
1105 /* allocate buffer */
1106 if (B_size < MINBUFSIZE)
1107 B_size = MINBUFSIZE;
1108 if ((buf = malloc(B_size)) == NULL)
1109 errx(1, "%s", strerror(ENOMEM));
1110
1111 /* timeouts */
1112 if ((s = getenv("FTP_TIMEOUT")) != NULL) {
1113 ftp_timeout = strtol(s, &end, 10);
1114 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) {
1115 warnx("FTP_TIMEOUT (%s) is not a positive integer", s);
1116 ftp_timeout = 0;
1117 }
1118 }
1119 if ((s = getenv("HTTP_TIMEOUT")) != NULL) {
1120 http_timeout = strtol(s, &end, 10);
1121 if (*s == '\0' || *end != '\0' || http_timeout < 0) {
1122 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s);
1123 http_timeout = 0;
1124 }
1125 }
1126
1127 /* signal handling */
1128 sa.sa_flags = 0;
1129 sa.sa_handler = sig_handler;
1130 sigemptyset(&sa.sa_mask);
1131 sigaction(SIGALRM, &sa, NULL);
1132 sa.sa_flags = SA_RESETHAND;
1133 sigaction(SIGINT, &sa, NULL);
1134 fetchRestartCalls = 0;
1135
1136 /* output file */
1137 if (o_flag) {
1138 if (strcmp(o_filename, "-") == 0) {
1139 o_stdout = 1;
1140 } else if (stat(o_filename, &sb) == -1) {
1141 if (errno == ENOENT) {
1142 if (argc > 1)
1143 errx(1, "%s is not a directory",
1144 o_filename);
1145 } else {
1146 err(1, "%s", o_filename);
1147 }
1148 } else {
1149 if (sb.st_mode & S_IFDIR)
1150 o_directory = 1;
1151 }
1152 }
1153
1154 /* check if output is to a tty (for progress report) */
1155 v_tty = isatty(STDERR_FILENO);
1156 v_progress = v_tty && v_level > 0;
1157 if (v_progress)
1158 pgrp = getpgrp();
1159
1160 r = 0;
1161
1162 /* authentication */
1163 if (v_tty)
1164 fetchAuthMethod = query_auth;
1165 if (N_filename != NULL)
1166 if (setenv("NETRC", N_filename, 1) == -1)
1167 err(1, "setenv: cannot set NETRC=%s", N_filename);
1168
1169 while (argc) {
1170 if ((p = strrchr(*argv, '/')) == NULL)
1171 p = *argv;
1172 else
1173 p++;
1174
1175 if (!*p)
1176 p = "fetch.out";
1177
1178 fetchLastErrCode = 0;
1179
1180 if (o_flag) {
1181 if (o_stdout) {
1182 e = fetch(*argv, "-", &is_http);
1183 } else if (o_directory) {
1184 asprintf(&q, "%s/%s", o_filename, p);
1185 e = fetch(*argv, q, &is_http);
1186 free(q);
1187 } else {
1188 e = fetch(*argv, o_filename, &is_http);
1189 }
1190 } else {
1191 e = fetch(*argv, p, &is_http);
1192 }
1193
1194 if (sigint)
1195 kill(getpid(), SIGINT);
1196
1197 if (e == 0 && once_flag)
1198 exit(0);
1199
1200 if (e) {
1201 r = 1;
1202 if ((fetchLastErrCode
1203 && fetchLastErrCode != FETCH_AUTH
1204 && fetchLastErrCode != FETCH_UNAVAIL
1205 && fetchLastErrCode != FETCH_MOVED
1206 && fetchLastErrCode != FETCH_URL
1207 && fetchLastErrCode != FETCH_RESOLV
1208 && fetchLastErrCode != FETCH_UNKNOWN
1209 && (!is_http || (
1210 fetchLastErrCode != FETCH_PROTO
1211 && fetchLastErrCode != FETCH_SERVER
1212 && fetchLastErrCode != FETCH_TEMP
1213 && fetchLastErrCode != FETCH_TIMEOUT
1214 )))) {
1215 if (w_secs && v_level)
1216 fprintf(stderr, "Waiting %ld seconds "
1217 "before retrying\n", w_secs);
1218 if (w_secs)
1219 sleep(w_secs);
1220 if (a_flag)
1221 continue;
1222 }
1223 }
1224
1225 argc--, argv++;
1226 }
1227
1228 exit(r);
1229 }
1230