1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 2000-2014 Dag-Erling Smørgrav
5 * Copyright (c) 2013 Michael Gmelin <freebsd@grem.de>
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/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 <getopt.h>
41 #include <signal.h>
42 #include <stdint.h>
43 #include <stdio.h>
44 #include <stdlib.h>
45 #include <string.h>
46 #include <termios.h>
47 #include <unistd.h>
48
49 #include <fetch.h>
50
51 #define MINBUFSIZE 16384
52 #define TIMEOUT 120
53
54 /* Option flags */
55 static int A_flag; /* -A: do not follow 302 redirects */
56 static int a_flag; /* -a: auto retry */
57 static off_t B_size; /* -B: buffer size */
58 static int b_flag; /*! -b: workaround TCP bug */
59 static char *c_dirname; /* -c: remote directory */
60 static int d_flag; /* -d: direct connection */
61 static int F_flag; /* -F: restart without checking mtime */
62 static char *f_filename; /* -f: file to fetch */
63 static char *h_hostname; /* -h: host to fetch from */
64 static int i_flag; /* -i: specify file for mtime comparison */
65 static char *i_filename; /* name of input file */
66 static int l_flag; /* -l: link rather than copy file: URLs */
67 static int m_flag; /* -[Mm]: mirror mode */
68 static char *N_filename; /* -N: netrc file name */
69 static int n_flag; /* -n: do not preserve modification time */
70 static int o_flag; /* -o: specify output file */
71 static int o_directory; /* output file is a directory */
72 static char *o_filename; /* name of output file */
73 static int o_stdout; /* output file is stdout */
74 static int once_flag; /* -1: stop at first successful file */
75 static int p_flag; /* -[Pp]: use passive FTP */
76 static int R_flag; /* -R: don't delete partial files */
77 static int r_flag; /* -r: restart previous transfer */
78 static off_t S_size; /* -S: require size to match */
79 static int s_flag; /* -s: show size, don't fetch */
80 static long T_secs; /* -T: transfer timeout in seconds */
81 static int t_flag; /*! -t: workaround TCP bug */
82 static int U_flag; /* -U: do not use high ports */
83 static int v_level = 1; /* -v: verbosity level */
84 static int v_tty; /* stdout is a tty */
85 static int v_progress; /* whether to display progress */
86 static pid_t pgrp; /* our process group */
87 static long w_secs; /* -w: retry delay */
88 static int family = PF_UNSPEC; /* -[46]: address family to use */
89
90 static int siginfo; /* SIGINFO received */
91 static int sigint; /* SIGINT received */
92
93 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */
94 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */
95 static char *buf; /* transfer buffer */
96
97 enum options
98 {
99 OPTION_BIND_ADDRESS,
100 OPTION_NO_FTP_PASSIVE_MODE,
101 OPTION_HTTP_REFERER,
102 OPTION_HTTP_USER_AGENT,
103 OPTION_NO_PROXY,
104 OPTION_SSL_CA_CERT_FILE,
105 OPTION_SSL_CA_CERT_PATH,
106 OPTION_SSL_CLIENT_CERT_FILE,
107 OPTION_SSL_CLIENT_KEY_FILE,
108 OPTION_SSL_CRL_FILE,
109 OPTION_SSL_NO_SSL3,
110 OPTION_SSL_NO_TLS1,
111 OPTION_SSL_NO_VERIFY_HOSTNAME,
112 OPTION_SSL_NO_VERIFY_PEER
113 };
114
115
116 static struct option longopts[] =
117 {
118 /* mapping to single character argument */
119 { "one-file", no_argument, NULL, '1' },
120 { "ipv4-only", no_argument, NULL, '4' },
121 { "ipv6-only", no_argument, NULL, '6' },
122 { "no-redirect", no_argument, NULL, 'A' },
123 { "retry", no_argument, NULL, 'a' },
124 { "buffer-size", required_argument, NULL, 'B' },
125 /* -c not mapped, since it's deprecated */
126 { "direct", no_argument, NULL, 'd' },
127 { "force-restart", no_argument, NULL, 'F' },
128 /* -f not mapped, since it's deprecated */
129 /* -h not mapped, since it's deprecated */
130 { "if-modified-since", required_argument, NULL, 'i' },
131 { "symlink", no_argument, NULL, 'l' },
132 /* -M not mapped since it's the same as -m */
133 { "mirror", no_argument, NULL, 'm' },
134 { "netrc", required_argument, NULL, 'N' },
135 { "no-mtime", no_argument, NULL, 'n' },
136 { "output", required_argument, NULL, 'o' },
137 /* -P not mapped since it's the same as -p */
138 { "passive", no_argument, NULL, 'p' },
139 { "quiet", no_argument, NULL, 'q' },
140 { "keep-output", no_argument, NULL, 'R' },
141 { "restart", no_argument, NULL, 'r' },
142 { "require-size", required_argument, NULL, 'S' },
143 { "print-size", no_argument, NULL, 's' },
144 { "timeout", required_argument, NULL, 'T' },
145 { "passive-portrange-default", no_argument, NULL, 'T' },
146 { "verbose", no_argument, NULL, 'v' },
147 { "retry-delay", required_argument, NULL, 'w' },
148
149 /* options without a single character equivalent */
150 { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS },
151 { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE },
152 { "referer", required_argument, NULL, OPTION_HTTP_REFERER },
153 { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT },
154 { "no-proxy", required_argument, NULL, OPTION_NO_PROXY },
155 { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE },
156 { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH },
157 { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE },
158 { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE },
159 { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE },
160 { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 },
161 { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 },
162 { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME },
163 { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER },
164
165 { NULL, 0, NULL, 0 }
166 };
167
168 /*
169 * Signal handler
170 */
171 static void
sig_handler(int sig)172 sig_handler(int sig)
173 {
174 switch (sig) {
175 case SIGINFO:
176 siginfo = 1;
177 break;
178 case SIGINT:
179 sigint = 1;
180 break;
181 }
182 }
183
184 struct xferstat {
185 char name[64];
186 struct timeval start; /* start of transfer */
187 struct timeval last; /* time of last update */
188 struct timeval last2; /* time of previous last update */
189 off_t size; /* size of file per HTTP hdr */
190 off_t offset; /* starting offset in file */
191 off_t rcvd; /* bytes already received */
192 off_t lastrcvd; /* bytes received since last update */
193 };
194
195 /*
196 * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs
197 * depending on its magnitude
198 */
199 static void
stat_seconds(char * str,size_t strsz,long seconds)200 stat_seconds(char *str, size_t strsz, long seconds)
201 {
202
203 if (seconds > 86400)
204 snprintf(str, strsz, "%02ldd%02ldh",
205 seconds / 86400, (seconds % 86400) / 3600);
206 else if (seconds > 3600)
207 snprintf(str, strsz, "%02ldh%02ldm",
208 seconds / 3600, (seconds % 3600) / 60);
209 else if (seconds > 60)
210 snprintf(str, strsz, "%02ldm%02lds",
211 seconds / 60, seconds % 60);
212 else
213 snprintf(str, strsz, " %02lds",
214 seconds);
215 }
216
217 /*
218 * Compute and display ETA
219 */
220 static void
stat_eta(char * str,size_t strsz,const struct xferstat * xs)221 stat_eta(char *str, size_t strsz, const struct xferstat *xs)
222 {
223 long elapsed, eta;
224 off_t received, expected;
225
226 elapsed = xs->last.tv_sec - xs->start.tv_sec;
227 received = xs->rcvd - xs->offset;
228 expected = xs->size - xs->rcvd;
229 eta = (long)((double)elapsed * expected / received);
230 if (eta > 0)
231 stat_seconds(str, strsz, eta);
232 else
233 stat_seconds(str, strsz, elapsed);
234 }
235
236 /*
237 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'...
238 */
239 static const char *prefixes = " kMGTP";
240 static void
stat_bytes(char * str,size_t strsz,off_t bytes)241 stat_bytes(char *str, size_t strsz, off_t bytes)
242 {
243 const char *prefix = prefixes;
244
245 while (bytes > 9999 && prefix[1] != '\0') {
246 bytes /= 1024;
247 prefix++;
248 }
249 snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix);
250 }
251
252 /*
253 * Compute and display transfer rate
254 */
255 static void
stat_bps(char * str,size_t strsz,struct xferstat * xs)256 stat_bps(char *str, size_t strsz, struct xferstat *xs)
257 {
258 char bytes[16];
259 double delta, bps;
260
261 delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6))
262 - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6));
263
264 if (delta == 0.0) {
265 snprintf(str, strsz, "?? Bps");
266 } else {
267 bps = (xs->rcvd - xs->lastrcvd) / delta;
268 stat_bytes(bytes, sizeof bytes, (off_t)bps);
269 snprintf(str, strsz, "%sps", bytes);
270 }
271 }
272
273 /*
274 * Update the stats display
275 */
276 static void
stat_display(struct xferstat * xs,int force)277 stat_display(struct xferstat *xs, int force)
278 {
279 char bytes[16], bps[16], eta[16];
280 struct timeval now;
281 int ctty_pgrp;
282
283 /* check if we're the foreground process */
284 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 ||
285 (pid_t)ctty_pgrp != pgrp)
286 return;
287
288 gettimeofday(&now, NULL);
289 if (!force && now.tv_sec <= xs->last.tv_sec)
290 return;
291 xs->last2 = xs->last;
292 xs->last = now;
293
294 fprintf(stderr, "\r%-46.46s", xs->name);
295 if (xs->rcvd >= xs->size) {
296 stat_bytes(bytes, sizeof bytes, xs->rcvd);
297 setproctitle("%s [%s]", xs->name, bytes);
298 fprintf(stderr, " %s", bytes);
299 } else {
300 stat_bytes(bytes, sizeof bytes, xs->size);
301 setproctitle("%s [%d%% of %s]", xs->name,
302 (int)((100.0 * xs->rcvd) / xs->size),
303 bytes);
304 fprintf(stderr, "%3d%% of %s",
305 (int)((100.0 * xs->rcvd) / xs->size),
306 bytes);
307 }
308 if (force == 2) {
309 xs->lastrcvd = xs->offset;
310 xs->last2 = xs->start;
311 }
312 stat_bps(bps, sizeof bps, xs);
313 fprintf(stderr, " %s", bps);
314 if ((xs->size > 0 && xs->rcvd > 0 &&
315 xs->last.tv_sec >= xs->start.tv_sec + 3) ||
316 force == 2) {
317 stat_eta(eta, sizeof eta, xs);
318 fprintf(stderr, " %s", eta);
319 }
320 xs->lastrcvd = xs->rcvd;
321 }
322
323 /*
324 * Initialize the transfer statistics
325 */
326 static void
stat_start(struct xferstat * xs,const char * name,off_t size,off_t offset)327 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset)
328 {
329
330 memset(xs, 0, sizeof *xs);
331 snprintf(xs->name, sizeof xs->name, "%s", name);
332 gettimeofday(&xs->start, NULL);
333 xs->last2 = xs->last = xs->start;
334 xs->size = size;
335 xs->offset = offset;
336 xs->rcvd = offset;
337 xs->lastrcvd = offset;
338 if (v_progress)
339 stat_display(xs, 1);
340 else if (v_level > 0)
341 fprintf(stderr, "%-46s", xs->name);
342 }
343
344 /*
345 * Update the transfer statistics
346 */
347 static void
stat_update(struct xferstat * xs,off_t rcvd)348 stat_update(struct xferstat *xs, off_t rcvd)
349 {
350
351 xs->rcvd = rcvd;
352 if (v_progress)
353 stat_display(xs, 0);
354 }
355
356 /*
357 * Finalize the transfer statistics
358 */
359 static void
stat_end(struct xferstat * xs)360 stat_end(struct xferstat *xs)
361 {
362 char bytes[16], bps[16], eta[16];
363
364 gettimeofday(&xs->last, NULL);
365 if (v_progress) {
366 stat_display(xs, 2);
367 putc('\n', stderr);
368 } else if (v_level > 0) {
369 stat_bytes(bytes, sizeof bytes, xs->rcvd);
370 stat_bps(bps, sizeof bps, xs);
371 stat_eta(eta, sizeof eta, xs);
372 fprintf(stderr, " %s %s %s\n", bytes, bps, eta);
373 }
374 }
375
376 /*
377 * Ask the user for authentication details
378 */
379 static int
query_auth(struct url * URL)380 query_auth(struct url *URL)
381 {
382 struct termios tios;
383 tcflag_t saved_flags;
384 int i, nopwd;
385
386 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n",
387 URL->scheme, URL->host, URL->port);
388
389 fprintf(stderr, "Login: ");
390 if (fgets(URL->user, sizeof URL->user, stdin) == NULL)
391 return (-1);
392 for (i = strlen(URL->user); i >= 0; --i)
393 if (URL->user[i] == '\r' || URL->user[i] == '\n')
394 URL->user[i] = '\0';
395
396 fprintf(stderr, "Password: ");
397 if (tcgetattr(STDIN_FILENO, &tios) == 0) {
398 saved_flags = tios.c_lflag;
399 tios.c_lflag &= ~ECHO;
400 tios.c_lflag |= ECHONL|ICANON;
401 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios);
402 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
403 tios.c_lflag = saved_flags;
404 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios);
405 } else {
406 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
407 }
408 if (nopwd)
409 return (-1);
410 for (i = strlen(URL->pwd); i >= 0; --i)
411 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n')
412 URL->pwd[i] = '\0';
413
414 return (0);
415 }
416
417 /*
418 * Fetch a file
419 */
420 static int
fetch(char * URL,const char * path,int * is_http)421 fetch(char *URL, const char *path, int *is_http)
422 {
423 struct url *url;
424 struct url_stat us;
425 struct stat sb, nsb;
426 struct xferstat xs;
427 FILE *f, *of;
428 size_t size, readcnt, wr;
429 off_t count, size_prev;
430 char flags[8];
431 const char *slash;
432 char *tmppath;
433 int r, tries;
434 unsigned timeout;
435 int timedout = 0;
436 char *ptr;
437
438 f = of = NULL;
439 tmppath = NULL;
440
441 timeout = 0;
442 *flags = 0;
443 count = 0;
444
445 /* set verbosity level */
446 if (v_level > 1)
447 strcat(flags, "v");
448 if (v_level > 2)
449 fetchDebug = 1;
450
451 /* parse URL */
452 url = NULL;
453 if (*URL == '\0') {
454 warnx("empty URL");
455 goto failure;
456 }
457 if ((url = fetchParseURL(URL)) == NULL) {
458 warnx("%s: parse error", URL);
459 goto failure;
460 }
461
462 /* if no scheme was specified, take a guess */
463 if (!*url->scheme) {
464 if (!*url->host)
465 strcpy(url->scheme, SCHEME_FILE);
466 else if (strncasecmp(url->host, "ftp.", 4) == 0)
467 strcpy(url->scheme, SCHEME_FTP);
468 else if (strncasecmp(url->host, "www.", 4) == 0)
469 strcpy(url->scheme, SCHEME_HTTP);
470 }
471
472 /* for both of http and https */
473 *is_http = strncmp(url->scheme, "http", 4) == 0;
474
475 /* common flags */
476 switch (family) {
477 case PF_INET:
478 strcat(flags, "4");
479 break;
480 case PF_INET6:
481 strcat(flags, "6");
482 break;
483 }
484
485 /* FTP specific flags */
486 if (strcmp(url->scheme, SCHEME_FTP) == 0) {
487 if (p_flag)
488 strcat(flags, "p");
489 if (d_flag)
490 strcat(flags, "d");
491 if (U_flag)
492 strcat(flags, "l");
493 timeout = T_secs ? T_secs : ftp_timeout;
494 }
495
496 /* HTTP specific flags */
497 if (strcmp(url->scheme, SCHEME_HTTP) == 0 ||
498 strcmp(url->scheme, SCHEME_HTTPS) == 0) {
499 if (d_flag)
500 strcat(flags, "d");
501 if (A_flag)
502 strcat(flags, "A");
503 timeout = T_secs ? T_secs : http_timeout;
504 if (i_flag) {
505 if (stat(i_filename, &sb)) {
506 warn("%s: stat()", i_filename);
507 goto failure;
508 }
509 url->ims_time = sb.st_mtime;
510 strcat(flags, "i");
511 }
512 }
513
514 /* set the protocol timeout. */
515 fetchTimeout = timeout;
516
517 /* just print size */
518 if (s_flag) {
519 r = fetchStat(url, &us, flags);
520 if (r == -1) {
521 warnx("%s", fetchLastErrString);
522 goto failure;
523 }
524 if (us.size == -1)
525 printf("Unknown\n");
526 else
527 printf("%jd\n", (intmax_t)us.size);
528 goto success;
529 }
530
531 tries = 1;
532 again:
533 r = 0;
534 /*
535 * If the -r flag was specified, we have to compare the local
536 * and remote files, so we should really do a fetchStat()
537 * first, but I know of at least one HTTP server that only
538 * sends the content size in response to GET requests, and
539 * leaves it out of replies to HEAD requests. Also, in the
540 * (frequent) case that the local and remote files match but
541 * the local file is truncated, we have sufficient information
542 * before the compare to issue a correct request. Therefore,
543 * we always issue a GET request as if we were sure the local
544 * file was a truncated copy of the remote file; we can drop
545 * the connection later if we change our minds.
546 */
547 sb.st_size = -1;
548 if (!o_stdout) {
549 r = stat(path, &sb);
550 if (r == 0 && (r_flag || tries > 1) && S_ISREG(sb.st_mode)) {
551 url->offset = sb.st_size;
552 } else if (r == -1 || !S_ISREG(sb.st_mode)) {
553 /*
554 * Whatever value sb.st_size has now is either
555 * wrong (if stat(2) failed) or irrelevant (if the
556 * path does not refer to a regular file)
557 */
558 sb.st_size = -1;
559 }
560 if (r == -1 && errno != ENOENT) {
561 warnx("%s: stat()", path);
562 goto failure;
563 }
564 }
565 size_prev = sb.st_size;
566
567 /* start the transfer */
568 f = fetchXGet(url, &us, flags);
569 if (f == NULL) {
570 if (i_flag && *is_http && fetchLastErrCode == FETCH_OK &&
571 strcmp(fetchLastErrString, "Not Modified") == 0) {
572 /* HTTP Not Modified Response, return OK. */
573 if (v_level > 0)
574 warnx("%s: %s", URL, fetchLastErrString);
575 r = 0;
576 goto done;
577 } else {
578 warnx("%s: %s", URL, fetchLastErrString);
579 goto failure;
580 }
581 }
582 if (sigint)
583 goto signal;
584
585 /* check that size is as expected */
586 if (S_size) {
587 if (us.size == -1) {
588 warnx("%s: size unknown", URL);
589 } else if (us.size != S_size) {
590 warnx("%s: size mismatch: expected %jd, actual %jd",
591 URL, (intmax_t)S_size, (intmax_t)us.size);
592 goto failure;
593 }
594 }
595
596 /* symlink instead of copy */
597 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) {
598 if (symlink(url->doc, path) == -1) {
599 warn("%s: symlink()", path);
600 goto failure;
601 }
602 goto success;
603 }
604
605 if (us.size == -1 && !o_stdout && v_level > 0)
606 warnx("%s: size of remote file is not known", URL);
607 if (v_level > 1) {
608 if (sb.st_size != -1)
609 fprintf(stderr, "local size / mtime: %jd / %ld\n",
610 (intmax_t)sb.st_size, (long)sb.st_mtime);
611 if (us.size != -1)
612 fprintf(stderr, "remote size / mtime: %jd / %ld\n",
613 (intmax_t)us.size, (long)us.mtime);
614 }
615
616 /* open output file */
617 if (o_stdout) {
618 /* output to stdout */
619 of = stdout;
620 } else if (r_flag && sb.st_size != -1) {
621 /* resume mode, local file exists */
622 if (!F_flag && us.mtime && sb.st_mtime != us.mtime && tries == 1) {
623 /* no match! have to refetch */
624 fclose(f);
625 /* if precious, warn the user and give up */
626 if (R_flag) {
627 warnx("%s: local modification time "
628 "does not match remote", path);
629 goto failure_keep;
630 }
631 } else if (url->offset > sb.st_size) {
632 /* gap between what we asked for and what we got */
633 warnx("%s: gap in resume mode", URL);
634 fclose(of);
635 of = NULL;
636 /* picked up again later */
637 } else if (us.size != -1) {
638 if (us.size == sb.st_size)
639 /* nothing to do */
640 goto success;
641 if (sb.st_size > us.size) {
642 /* local file too long! */
643 warnx("%s: local file (%jd bytes) is longer "
644 "than remote file (%jd bytes)", path,
645 (intmax_t)sb.st_size, (intmax_t)us.size);
646 goto failure;
647 }
648 /* we got it, open local file */
649 if ((of = fopen(path, "r+")) == NULL) {
650 warn("%s: fopen()", path);
651 goto failure;
652 }
653 /* check that it didn't move under our feet */
654 if (fstat(fileno(of), &nsb) == -1) {
655 /* can't happen! */
656 warn("%s: fstat()", path);
657 goto failure;
658 }
659 if (nsb.st_dev != sb.st_dev ||
660 nsb.st_ino != sb.st_ino ||
661 nsb.st_size != sb.st_size) {
662 warnx("%s: file has changed", URL);
663 fclose(of);
664 of = NULL;
665 sb = nsb;
666 /* picked up again later */
667 }
668 }
669 /* seek to where we left off */
670 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) {
671 warn("%s: fseeko()", path);
672 fclose(of);
673 of = NULL;
674 /* picked up again later */
675 }
676 } else if (m_flag && sb.st_size != -1) {
677 /* mirror mode, local file exists */
678 if (sb.st_size == us.size && sb.st_mtime == us.mtime)
679 goto success;
680 }
681
682 if (of == NULL) {
683 /*
684 * We don't yet have an output file; either this is a
685 * vanilla run with no special flags, or the local and
686 * remote files didn't match.
687 */
688
689 if (url->offset > 0) {
690 /*
691 * We tried to restart a transfer, but for
692 * some reason gave up - so we have to restart
693 * from scratch if we want the whole file
694 */
695 url->offset = 0;
696 if ((f = fetchXGet(url, &us, flags)) == NULL) {
697 warnx("%s: %s", URL, fetchLastErrString);
698 goto failure;
699 }
700 if (sigint)
701 goto signal;
702 }
703
704 /* construct a temp file name */
705 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) {
706 if ((slash = strrchr(path, '/')) == NULL)
707 slash = path;
708 else
709 ++slash;
710 if(tmppath != NULL)
711 free(tmppath);
712 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s",
713 (int)(slash - path), path, slash);
714 if (tmppath != NULL) {
715 if (mkstemps(tmppath, strlen(slash) + 1) == -1) {
716 warn("%s: mkstemps()", path);
717 goto failure;
718 }
719 of = fopen(tmppath, "w");
720 chown(tmppath, sb.st_uid, sb.st_gid);
721 chmod(tmppath, sb.st_mode & ALLPERMS);
722 }
723 }
724 if (of == NULL)
725 of = fopen(path, "w");
726 if (of == NULL) {
727 warn("%s: open()", path);
728 goto failure;
729 }
730 }
731 count = url->offset;
732
733 /* start the counter */
734 stat_start(&xs, path, us.size, count);
735
736 siginfo = sigint = 0;
737
738 /* suck in the data */
739 setvbuf(f, NULL, _IOFBF, B_size);
740 signal(SIGINFO, sig_handler);
741 while (!sigint) {
742 if (us.size != -1 && us.size - count < B_size &&
743 us.size - count >= 0)
744 size = us.size - count;
745 else
746 size = B_size;
747 if (siginfo) {
748 stat_end(&xs);
749 siginfo = 0;
750 }
751
752 if (size == 0)
753 break;
754
755 if ((readcnt = fread(buf, 1, size, f)) < size) {
756 if (ferror(f) && errno == EINTR && !sigint)
757 clearerr(f);
758 else if (readcnt == 0)
759 break;
760 }
761
762 stat_update(&xs, count += readcnt);
763 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr)
764 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) {
765 if (ferror(of) && errno == EINTR && !sigint)
766 clearerr(of);
767 else
768 break;
769 }
770 if (readcnt != 0)
771 break;
772 }
773 timedout = ferror(f) && errno == ETIMEDOUT;
774 signal(SIGINFO, SIG_DFL);
775
776 stat_end(&xs);
777
778 /*
779 * If the transfer timed out or was interrupted, we still want to
780 * set the mtime in case the file is not removed (-r or -R) and
781 * the user later restarts the transfer.
782 */
783 signal:
784 /* set mtime of local file */
785 if (!n_flag && us.mtime && !o_stdout && of != NULL &&
786 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) {
787 struct timeval tv[2];
788
789 fflush(of);
790 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime);
791 tv[1].tv_sec = (long)us.mtime;
792 tv[0].tv_usec = tv[1].tv_usec = 0;
793 if (utimes(tmppath ? tmppath : path, tv))
794 warn("%s: utimes()", tmppath ? tmppath : path);
795 }
796
797 /* timed out or interrupted? */
798 if (timedout) {
799 warnx("transfer timed out");
800 goto failure;
801 }
802 if (sigint) {
803 warnx("transfer interrupted");
804 goto failure;
805 }
806
807 /* timeout / interrupt before connection completely established? */
808 if (f == NULL)
809 goto failure;
810
811 if (!timedout) {
812 /* check the status of our files */
813 if (ferror(f))
814 warn("%s", URL);
815 if (ferror(of))
816 warn("%s", path);
817 if (ferror(f) || ferror(of))
818 goto failure;
819 }
820
821 /* did the transfer complete normally? */
822 if (us.size != -1 && count < us.size) {
823 warnx("%s appears to be truncated: %jd/%jd bytes",
824 path, (intmax_t)count, (intmax_t)us.size);
825 if(!o_stdout && a_flag && count > size_prev) {
826 fclose(f);
827 if (w_secs)
828 sleep(w_secs);
829 tries++;
830 goto again;
831 }
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 (timedout && 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, is_http, 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 = strtoll(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_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 sa.sa_flags = SA_RESETHAND;
1116 sigaction(SIGINT, &sa, NULL);
1117 fetchRestartCalls = 0;
1118
1119 /* output file */
1120 if (o_flag) {
1121 if (strcmp(o_filename, "-") == 0) {
1122 o_stdout = 1;
1123 } else if (stat(o_filename, &sb) == -1) {
1124 if (errno == ENOENT) {
1125 if (argc > 1)
1126 errx(1, "%s is not a directory",
1127 o_filename);
1128 } else {
1129 err(1, "%s", o_filename);
1130 }
1131 } else {
1132 if (sb.st_mode & S_IFDIR)
1133 o_directory = 1;
1134 }
1135 }
1136
1137 /* check if output is to a tty (for progress report) */
1138 v_tty = isatty(STDERR_FILENO);
1139 v_progress = v_tty && v_level > 0;
1140 if (v_progress)
1141 pgrp = getpgrp();
1142
1143 r = 0;
1144
1145 /* authentication */
1146 if (v_tty)
1147 fetchAuthMethod = query_auth;
1148 if (N_filename != NULL)
1149 if (setenv("NETRC", N_filename, 1) == -1)
1150 err(1, "setenv: cannot set NETRC=%s", N_filename);
1151
1152 while (argc) {
1153 if ((p = strrchr(*argv, '/')) == NULL)
1154 p = *argv;
1155 else
1156 p++;
1157
1158 if (!*p)
1159 p = "fetch.out";
1160
1161 fetchLastErrCode = 0;
1162
1163 if (o_flag) {
1164 if (o_stdout) {
1165 e = fetch(*argv, "-", &is_http);
1166 } else if (o_directory) {
1167 asprintf(&q, "%s/%s", o_filename, p);
1168 e = fetch(*argv, q, &is_http);
1169 free(q);
1170 } else {
1171 e = fetch(*argv, o_filename, &is_http);
1172 }
1173 } else {
1174 e = fetch(*argv, p, &is_http);
1175 }
1176
1177 if (sigint)
1178 kill(getpid(), SIGINT);
1179
1180 if (e == 0 && once_flag)
1181 exit(0);
1182
1183 if (e) {
1184 r = 1;
1185 if ((fetchLastErrCode
1186 && fetchLastErrCode != FETCH_AUTH
1187 && fetchLastErrCode != FETCH_UNAVAIL
1188 && fetchLastErrCode != FETCH_MOVED
1189 && fetchLastErrCode != FETCH_URL
1190 && fetchLastErrCode != FETCH_RESOLV
1191 && fetchLastErrCode != FETCH_UNKNOWN
1192 && (!is_http || (
1193 fetchLastErrCode != FETCH_PROTO
1194 && fetchLastErrCode != FETCH_SERVER
1195 && fetchLastErrCode != FETCH_TEMP
1196 && fetchLastErrCode != FETCH_TIMEOUT
1197 )))) {
1198 if (w_secs && v_level)
1199 fprintf(stderr, "Waiting %ld seconds "
1200 "before retrying\n", w_secs);
1201 if (w_secs)
1202 sleep(w_secs);
1203 if (a_flag)
1204 continue;
1205 }
1206 }
1207
1208 argc--, argv++;
1209 }
1210
1211 exit(r);
1212 }
1213