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 sigalrm; /* SIGALRM received */
91 static int siginfo; /* SIGINFO received */
92 static int sigint; /* SIGINT received */
93
94 static long ftp_timeout = TIMEOUT; /* default timeout for FTP transfers */
95 static long http_timeout = TIMEOUT;/* default timeout for HTTP transfers */
96 static char *buf; /* transfer buffer */
97
98 enum options
99 {
100 OPTION_BIND_ADDRESS,
101 OPTION_NO_FTP_PASSIVE_MODE,
102 OPTION_HTTP_REFERER,
103 OPTION_HTTP_USER_AGENT,
104 OPTION_NO_PROXY,
105 OPTION_SSL_CA_CERT_FILE,
106 OPTION_SSL_CA_CERT_PATH,
107 OPTION_SSL_CLIENT_CERT_FILE,
108 OPTION_SSL_CLIENT_KEY_FILE,
109 OPTION_SSL_CRL_FILE,
110 OPTION_SSL_NO_SSL3,
111 OPTION_SSL_NO_TLS1,
112 OPTION_SSL_NO_VERIFY_HOSTNAME,
113 OPTION_SSL_NO_VERIFY_PEER
114 };
115
116
117 static struct option longopts[] =
118 {
119 /* mapping to single character argument */
120 { "one-file", no_argument, NULL, '1' },
121 { "ipv4-only", no_argument, NULL, '4' },
122 { "ipv6-only", no_argument, NULL, '6' },
123 { "no-redirect", no_argument, NULL, 'A' },
124 { "retry", no_argument, NULL, 'a' },
125 { "buffer-size", required_argument, NULL, 'B' },
126 /* -c not mapped, since it's deprecated */
127 { "direct", no_argument, NULL, 'd' },
128 { "force-restart", no_argument, NULL, 'F' },
129 /* -f not mapped, since it's deprecated */
130 /* -h not mapped, since it's deprecated */
131 { "if-modified-since", required_argument, NULL, 'i' },
132 { "symlink", no_argument, NULL, 'l' },
133 /* -M not mapped since it's the same as -m */
134 { "mirror", no_argument, NULL, 'm' },
135 { "netrc", required_argument, NULL, 'N' },
136 { "no-mtime", no_argument, NULL, 'n' },
137 { "output", required_argument, NULL, 'o' },
138 /* -P not mapped since it's the same as -p */
139 { "passive", no_argument, NULL, 'p' },
140 { "quiet", no_argument, NULL, 'q' },
141 { "keep-output", no_argument, NULL, 'R' },
142 { "restart", no_argument, NULL, 'r' },
143 { "require-size", required_argument, NULL, 'S' },
144 { "print-size", no_argument, NULL, 's' },
145 { "timeout", required_argument, NULL, 'T' },
146 { "passive-portrange-default", no_argument, NULL, 'T' },
147 { "verbose", no_argument, NULL, 'v' },
148 { "retry-delay", required_argument, NULL, 'w' },
149
150 /* options without a single character equivalent */
151 { "bind-address", required_argument, NULL, OPTION_BIND_ADDRESS },
152 { "no-passive", no_argument, NULL, OPTION_NO_FTP_PASSIVE_MODE },
153 { "referer", required_argument, NULL, OPTION_HTTP_REFERER },
154 { "user-agent", required_argument, NULL, OPTION_HTTP_USER_AGENT },
155 { "no-proxy", required_argument, NULL, OPTION_NO_PROXY },
156 { "ca-cert", required_argument, NULL, OPTION_SSL_CA_CERT_FILE },
157 { "ca-path", required_argument, NULL, OPTION_SSL_CA_CERT_PATH },
158 { "cert", required_argument, NULL, OPTION_SSL_CLIENT_CERT_FILE },
159 { "key", required_argument, NULL, OPTION_SSL_CLIENT_KEY_FILE },
160 { "crl", required_argument, NULL, OPTION_SSL_CRL_FILE },
161 { "no-sslv3", no_argument, NULL, OPTION_SSL_NO_SSL3 },
162 { "no-tlsv1", no_argument, NULL, OPTION_SSL_NO_TLS1 },
163 { "no-verify-hostname", no_argument, NULL, OPTION_SSL_NO_VERIFY_HOSTNAME },
164 { "no-verify-peer", no_argument, NULL, OPTION_SSL_NO_VERIFY_PEER },
165
166 { NULL, 0, NULL, 0 }
167 };
168
169 /*
170 * Signal handler
171 */
172 static void
sig_handler(int sig)173 sig_handler(int sig)
174 {
175 switch (sig) {
176 case SIGALRM:
177 sigalrm = 1;
178 break;
179 case SIGINFO:
180 siginfo = 1;
181 break;
182 case SIGINT:
183 sigint = 1;
184 break;
185 }
186 }
187
188 struct xferstat {
189 char name[64];
190 struct timeval start; /* start of transfer */
191 struct timeval last; /* time of last update */
192 struct timeval last2; /* time of previous last update */
193 off_t size; /* size of file per HTTP hdr */
194 off_t offset; /* starting offset in file */
195 off_t rcvd; /* bytes already received */
196 off_t lastrcvd; /* bytes received since last update */
197 };
198
199 /*
200 * Format a number of seconds as either XXdYYh, XXhYYm, XXmYYs, or XXs
201 * depending on its magnitude
202 */
203 static void
stat_seconds(char * str,size_t strsz,long seconds)204 stat_seconds(char *str, size_t strsz, long seconds)
205 {
206
207 if (seconds > 86400)
208 snprintf(str, strsz, "%02ldd%02ldh",
209 seconds / 86400, (seconds % 86400) / 3600);
210 else if (seconds > 3600)
211 snprintf(str, strsz, "%02ldh%02ldm",
212 seconds / 3600, (seconds % 3600) / 60);
213 else if (seconds > 60)
214 snprintf(str, strsz, "%02ldm%02lds",
215 seconds / 60, seconds % 60);
216 else
217 snprintf(str, strsz, " %02lds",
218 seconds);
219 }
220
221 /*
222 * Compute and display ETA
223 */
224 static void
stat_eta(char * str,size_t strsz,const struct xferstat * xs)225 stat_eta(char *str, size_t strsz, const struct xferstat *xs)
226 {
227 long elapsed, eta;
228 off_t received, expected;
229
230 elapsed = xs->last.tv_sec - xs->start.tv_sec;
231 received = xs->rcvd - xs->offset;
232 expected = xs->size - xs->rcvd;
233 eta = (long)((double)elapsed * expected / received);
234 if (eta > 0)
235 stat_seconds(str, strsz, eta);
236 else
237 stat_seconds(str, strsz, elapsed);
238 }
239
240 /*
241 * Format a number as "xxxx YB" where Y is ' ', 'k', 'M'...
242 */
243 static const char *prefixes = " kMGTP";
244 static void
stat_bytes(char * str,size_t strsz,off_t bytes)245 stat_bytes(char *str, size_t strsz, off_t bytes)
246 {
247 const char *prefix = prefixes;
248
249 while (bytes > 9999 && prefix[1] != '\0') {
250 bytes /= 1024;
251 prefix++;
252 }
253 snprintf(str, strsz, "%4ju %cB", (uintmax_t)bytes, *prefix);
254 }
255
256 /*
257 * Compute and display transfer rate
258 */
259 static void
stat_bps(char * str,size_t strsz,struct xferstat * xs)260 stat_bps(char *str, size_t strsz, struct xferstat *xs)
261 {
262 char bytes[16];
263 double delta, bps;
264
265 delta = ((double)xs->last.tv_sec + (xs->last.tv_usec / 1.e6))
266 - ((double)xs->last2.tv_sec + (xs->last2.tv_usec / 1.e6));
267
268 if (delta == 0.0) {
269 snprintf(str, strsz, "?? Bps");
270 } else {
271 bps = (xs->rcvd - xs->lastrcvd) / delta;
272 stat_bytes(bytes, sizeof bytes, (off_t)bps);
273 snprintf(str, strsz, "%sps", bytes);
274 }
275 }
276
277 /*
278 * Update the stats display
279 */
280 static void
stat_display(struct xferstat * xs,int force)281 stat_display(struct xferstat *xs, int force)
282 {
283 char bytes[16], bps[16], eta[16];
284 struct timeval now;
285 int ctty_pgrp;
286
287 /* check if we're the foreground process */
288 if (ioctl(STDERR_FILENO, TIOCGPGRP, &ctty_pgrp) != 0 ||
289 (pid_t)ctty_pgrp != pgrp)
290 return;
291
292 gettimeofday(&now, NULL);
293 if (!force && now.tv_sec <= xs->last.tv_sec)
294 return;
295 xs->last2 = xs->last;
296 xs->last = now;
297
298 fprintf(stderr, "\r%-46.46s", xs->name);
299 if (xs->rcvd >= xs->size) {
300 stat_bytes(bytes, sizeof bytes, xs->rcvd);
301 setproctitle("%s [%s]", xs->name, bytes);
302 fprintf(stderr, " %s", bytes);
303 } else {
304 stat_bytes(bytes, sizeof bytes, xs->size);
305 setproctitle("%s [%d%% of %s]", xs->name,
306 (int)((100.0 * xs->rcvd) / xs->size),
307 bytes);
308 fprintf(stderr, "%3d%% of %s",
309 (int)((100.0 * xs->rcvd) / xs->size),
310 bytes);
311 }
312 if (force == 2) {
313 xs->lastrcvd = xs->offset;
314 xs->last2 = xs->start;
315 }
316 stat_bps(bps, sizeof bps, xs);
317 fprintf(stderr, " %s", bps);
318 if ((xs->size > 0 && xs->rcvd > 0 &&
319 xs->last.tv_sec >= xs->start.tv_sec + 3) ||
320 force == 2) {
321 stat_eta(eta, sizeof eta, xs);
322 fprintf(stderr, " %s", eta);
323 }
324 xs->lastrcvd = xs->rcvd;
325 }
326
327 /*
328 * Initialize the transfer statistics
329 */
330 static void
stat_start(struct xferstat * xs,const char * name,off_t size,off_t offset)331 stat_start(struct xferstat *xs, const char *name, off_t size, off_t offset)
332 {
333
334 memset(xs, 0, sizeof *xs);
335 snprintf(xs->name, sizeof xs->name, "%s", name);
336 gettimeofday(&xs->start, NULL);
337 xs->last2 = xs->last = xs->start;
338 xs->size = size;
339 xs->offset = offset;
340 xs->rcvd = offset;
341 xs->lastrcvd = offset;
342 if (v_progress)
343 stat_display(xs, 1);
344 else if (v_level > 0)
345 fprintf(stderr, "%-46s", xs->name);
346 }
347
348 /*
349 * Update the transfer statistics
350 */
351 static void
stat_update(struct xferstat * xs,off_t rcvd)352 stat_update(struct xferstat *xs, off_t rcvd)
353 {
354
355 xs->rcvd = rcvd;
356 if (v_progress)
357 stat_display(xs, 0);
358 }
359
360 /*
361 * Finalize the transfer statistics
362 */
363 static void
stat_end(struct xferstat * xs)364 stat_end(struct xferstat *xs)
365 {
366 char bytes[16], bps[16], eta[16];
367
368 gettimeofday(&xs->last, NULL);
369 if (v_progress) {
370 stat_display(xs, 2);
371 putc('\n', stderr);
372 } else if (v_level > 0) {
373 stat_bytes(bytes, sizeof bytes, xs->rcvd);
374 stat_bps(bps, sizeof bps, xs);
375 stat_eta(eta, sizeof eta, xs);
376 fprintf(stderr, " %s %s %s\n", bytes, bps, eta);
377 }
378 }
379
380 /*
381 * Ask the user for authentication details
382 */
383 static int
query_auth(struct url * URL)384 query_auth(struct url *URL)
385 {
386 struct termios tios;
387 tcflag_t saved_flags;
388 int i, nopwd;
389
390 fprintf(stderr, "Authentication required for <%s://%s:%d/>!\n",
391 URL->scheme, URL->host, URL->port);
392
393 fprintf(stderr, "Login: ");
394 if (fgets(URL->user, sizeof URL->user, stdin) == NULL)
395 return (-1);
396 for (i = strlen(URL->user); i >= 0; --i)
397 if (URL->user[i] == '\r' || URL->user[i] == '\n')
398 URL->user[i] = '\0';
399
400 fprintf(stderr, "Password: ");
401 if (tcgetattr(STDIN_FILENO, &tios) == 0) {
402 saved_flags = tios.c_lflag;
403 tios.c_lflag &= ~ECHO;
404 tios.c_lflag |= ECHONL|ICANON;
405 tcsetattr(STDIN_FILENO, TCSAFLUSH|TCSASOFT, &tios);
406 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
407 tios.c_lflag = saved_flags;
408 tcsetattr(STDIN_FILENO, TCSANOW|TCSASOFT, &tios);
409 } else {
410 nopwd = (fgets(URL->pwd, sizeof URL->pwd, stdin) == NULL);
411 }
412 if (nopwd)
413 return (-1);
414 for (i = strlen(URL->pwd); i >= 0; --i)
415 if (URL->pwd[i] == '\r' || URL->pwd[i] == '\n')
416 URL->pwd[i] = '\0';
417
418 return (0);
419 }
420
421 /*
422 * Fetch a file
423 */
424 static int
fetch(char * URL,const char * path,int * is_http)425 fetch(char *URL, const char *path, int *is_http)
426 {
427 struct url *url;
428 struct url_stat us;
429 struct stat sb, nsb;
430 struct xferstat xs;
431 FILE *f, *of;
432 size_t size, readcnt, wr;
433 off_t count, size_prev;
434 char flags[8];
435 const char *slash;
436 char *tmppath;
437 int r, tries;
438 unsigned timeout;
439 char *ptr;
440
441 f = of = NULL;
442 tmppath = NULL;
443
444 timeout = 0;
445 *flags = 0;
446 count = 0;
447
448 /* set verbosity level */
449 if (v_level > 1)
450 strcat(flags, "v");
451 if (v_level > 2)
452 fetchDebug = 1;
453
454 /* parse URL */
455 url = NULL;
456 if (*URL == '\0') {
457 warnx("empty URL");
458 goto failure;
459 }
460 if ((url = fetchParseURL(URL)) == NULL) {
461 warnx("%s: parse error", URL);
462 goto failure;
463 }
464
465 /* if no scheme was specified, take a guess */
466 if (!*url->scheme) {
467 if (!*url->host)
468 strcpy(url->scheme, SCHEME_FILE);
469 else if (strncasecmp(url->host, "ftp.", 4) == 0)
470 strcpy(url->scheme, SCHEME_FTP);
471 else if (strncasecmp(url->host, "www.", 4) == 0)
472 strcpy(url->scheme, SCHEME_HTTP);
473 }
474
475 /* for both of http and https */
476 *is_http = strncmp(url->scheme, "http", 4) == 0;
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 tries = 1;
541 again:
542 r = 0;
543 /*
544 * If the -r flag was specified, we have to compare the local
545 * and remote files, so we should really do a fetchStat()
546 * first, but I know of at least one HTTP server that only
547 * sends the content size in response to GET requests, and
548 * leaves it out of replies to HEAD requests. Also, in the
549 * (frequent) case that the local and remote files match but
550 * the local file is truncated, we have sufficient information
551 * before the compare to issue a correct request. Therefore,
552 * we always issue a GET request as if we were sure the local
553 * file was a truncated copy of the remote file; we can drop
554 * the connection later if we change our minds.
555 */
556 sb.st_size = -1;
557 if (!o_stdout) {
558 r = stat(path, &sb);
559 if (r == 0 && (r_flag || tries > 1) && S_ISREG(sb.st_mode)) {
560 url->offset = sb.st_size;
561 } else if (r == -1 || !S_ISREG(sb.st_mode)) {
562 /*
563 * Whatever value sb.st_size has now is either
564 * wrong (if stat(2) failed) or irrelevant (if the
565 * path does not refer to a regular file)
566 */
567 sb.st_size = -1;
568 }
569 if (r == -1 && errno != ENOENT) {
570 warnx("%s: stat()", path);
571 goto failure;
572 }
573 }
574 size_prev = sb.st_size;
575
576 /* start the transfer */
577 if (timeout)
578 alarm(timeout);
579 f = fetchXGet(url, &us, flags);
580 if (timeout)
581 alarm(0);
582 if (sigalrm || sigint)
583 goto signal;
584 if (f == NULL) {
585 warnx("%s: %s", URL, fetchLastErrString);
586 if (i_flag && (strcmp(url->scheme, SCHEME_HTTP) == 0 ||
587 strcmp(url->scheme, SCHEME_HTTPS) == 0) &&
588 fetchLastErrCode == FETCH_OK &&
589 strcmp(fetchLastErrString, "Not Modified") == 0) {
590 /* HTTP Not Modified Response, return OK. */
591 r = 0;
592 goto done;
593 } else
594 goto failure;
595 }
596 if (sigint)
597 goto signal;
598
599 /* check that size is as expected */
600 if (S_size) {
601 if (us.size == -1) {
602 warnx("%s: size unknown", URL);
603 } else if (us.size != S_size) {
604 warnx("%s: size mismatch: expected %jd, actual %jd",
605 URL, (intmax_t)S_size, (intmax_t)us.size);
606 goto failure;
607 }
608 }
609
610 /* symlink instead of copy */
611 if (l_flag && strcmp(url->scheme, "file") == 0 && !o_stdout) {
612 if (symlink(url->doc, path) == -1) {
613 warn("%s: symlink()", path);
614 goto failure;
615 }
616 goto success;
617 }
618
619 if (us.size == -1 && !o_stdout && v_level > 0)
620 warnx("%s: size of remote file is not known", URL);
621 if (v_level > 1) {
622 if (sb.st_size != -1)
623 fprintf(stderr, "local size / mtime: %jd / %ld\n",
624 (intmax_t)sb.st_size, (long)sb.st_mtime);
625 if (us.size != -1)
626 fprintf(stderr, "remote size / mtime: %jd / %ld\n",
627 (intmax_t)us.size, (long)us.mtime);
628 }
629
630 /* open output file */
631 if (o_stdout) {
632 /* output to stdout */
633 of = stdout;
634 } else if (r_flag && sb.st_size != -1) {
635 /* resume mode, local file exists */
636 if (!F_flag && us.mtime && sb.st_mtime != us.mtime && tries == 1) {
637 /* no match! have to refetch */
638 fclose(f);
639 /* if precious, warn the user and give up */
640 if (R_flag) {
641 warnx("%s: local modification time "
642 "does not match remote", path);
643 goto failure_keep;
644 }
645 } else if (url->offset > sb.st_size) {
646 /* gap between what we asked for and what we got */
647 warnx("%s: gap in resume mode", URL);
648 fclose(of);
649 of = NULL;
650 /* picked up again later */
651 } else if (us.size != -1) {
652 if (us.size == sb.st_size)
653 /* nothing to do */
654 goto success;
655 if (sb.st_size > us.size) {
656 /* local file too long! */
657 warnx("%s: local file (%jd bytes) is longer "
658 "than remote file (%jd bytes)", path,
659 (intmax_t)sb.st_size, (intmax_t)us.size);
660 goto failure;
661 }
662 /* we got it, open local file */
663 if ((of = fopen(path, "r+")) == NULL) {
664 warn("%s: fopen()", path);
665 goto failure;
666 }
667 /* check that it didn't move under our feet */
668 if (fstat(fileno(of), &nsb) == -1) {
669 /* can't happen! */
670 warn("%s: fstat()", path);
671 goto failure;
672 }
673 if (nsb.st_dev != sb.st_dev ||
674 nsb.st_ino != sb.st_ino ||
675 nsb.st_size != sb.st_size) {
676 warnx("%s: file has changed", URL);
677 fclose(of);
678 of = NULL;
679 sb = nsb;
680 /* picked up again later */
681 }
682 }
683 /* seek to where we left off */
684 if (of != NULL && fseeko(of, url->offset, SEEK_SET) != 0) {
685 warn("%s: fseeko()", path);
686 fclose(of);
687 of = NULL;
688 /* picked up again later */
689 }
690 } else if (m_flag && sb.st_size != -1) {
691 /* mirror mode, local file exists */
692 if (sb.st_size == us.size && sb.st_mtime == us.mtime)
693 goto success;
694 }
695
696 if (of == NULL) {
697 /*
698 * We don't yet have an output file; either this is a
699 * vanilla run with no special flags, or the local and
700 * remote files didn't match.
701 */
702
703 if (url->offset > 0) {
704 /*
705 * We tried to restart a transfer, but for
706 * some reason gave up - so we have to restart
707 * from scratch if we want the whole file
708 */
709 url->offset = 0;
710 if ((f = fetchXGet(url, &us, flags)) == NULL) {
711 warnx("%s: %s", URL, fetchLastErrString);
712 goto failure;
713 }
714 if (sigint)
715 goto signal;
716 }
717
718 /* construct a temp file name */
719 if (sb.st_size != -1 && S_ISREG(sb.st_mode)) {
720 if ((slash = strrchr(path, '/')) == NULL)
721 slash = path;
722 else
723 ++slash;
724 if(tmppath != NULL)
725 free(tmppath);
726 asprintf(&tmppath, "%.*s.fetch.XXXXXX.%s",
727 (int)(slash - path), path, slash);
728 if (tmppath != NULL) {
729 if (mkstemps(tmppath, strlen(slash) + 1) == -1) {
730 warn("%s: mkstemps()", path);
731 goto failure;
732 }
733 of = fopen(tmppath, "w");
734 chown(tmppath, sb.st_uid, sb.st_gid);
735 chmod(tmppath, sb.st_mode & ALLPERMS);
736 }
737 }
738 if (of == NULL)
739 of = fopen(path, "w");
740 if (of == NULL) {
741 warn("%s: open()", path);
742 goto failure;
743 }
744 }
745 count = url->offset;
746
747 /* start the counter */
748 stat_start(&xs, path, us.size, count);
749
750 sigalrm = siginfo = sigint = 0;
751
752 /* suck in the data */
753 setvbuf(f, NULL, _IOFBF, B_size);
754 signal(SIGINFO, sig_handler);
755 while (!sigint) {
756 if (us.size != -1 && us.size - count < B_size &&
757 us.size - count >= 0)
758 size = us.size - count;
759 else
760 size = B_size;
761 if (siginfo) {
762 stat_end(&xs);
763 siginfo = 0;
764 }
765
766 if (size == 0)
767 break;
768
769 if ((readcnt = fread(buf, 1, size, f)) < size) {
770 if (ferror(f) && errno == EINTR && !sigint)
771 clearerr(f);
772 else if (readcnt == 0)
773 break;
774 }
775
776 stat_update(&xs, count += readcnt);
777 for (ptr = buf; readcnt > 0; ptr += wr, readcnt -= wr)
778 if ((wr = fwrite(ptr, 1, readcnt, of)) < readcnt) {
779 if (ferror(of) && errno == EINTR && !sigint)
780 clearerr(of);
781 else
782 break;
783 }
784 if (readcnt != 0)
785 break;
786 }
787 if (!sigalrm)
788 sigalrm = ferror(f) && errno == ETIMEDOUT;
789 signal(SIGINFO, SIG_DFL);
790
791 stat_end(&xs);
792
793 /*
794 * If the transfer timed out or was interrupted, we still want to
795 * set the mtime in case the file is not removed (-r or -R) and
796 * the user later restarts the transfer.
797 */
798 signal:
799 /* set mtime of local file */
800 if (!n_flag && us.mtime && !o_stdout && of != NULL &&
801 (stat(path, &sb) != -1) && sb.st_mode & S_IFREG) {
802 struct timeval tv[2];
803
804 fflush(of);
805 tv[0].tv_sec = (long)(us.atime ? us.atime : us.mtime);
806 tv[1].tv_sec = (long)us.mtime;
807 tv[0].tv_usec = tv[1].tv_usec = 0;
808 if (utimes(tmppath ? tmppath : path, tv))
809 warn("%s: utimes()", tmppath ? tmppath : path);
810 }
811
812 /* timed out or interrupted? */
813 if (sigalrm)
814 warnx("transfer timed out");
815 if (sigint) {
816 warnx("transfer interrupted");
817 goto failure;
818 }
819
820 /* timeout / interrupt before connection completley established? */
821 if (f == NULL)
822 goto failure;
823
824 if (!sigalrm) {
825 /* check the status of our files */
826 if (ferror(f))
827 warn("%s", URL);
828 if (ferror(of))
829 warn("%s", path);
830 if (ferror(f) || ferror(of))
831 goto failure;
832 }
833
834 /* did the transfer complete normally? */
835 if (us.size != -1 && count < us.size) {
836 warnx("%s appears to be truncated: %jd/%jd bytes",
837 path, (intmax_t)count, (intmax_t)us.size);
838 if(!o_stdout && a_flag && count > size_prev) {
839 fclose(f);
840 if (w_secs)
841 sleep(w_secs);
842 tries++;
843 goto again;
844 }
845 goto failure_keep;
846 }
847
848 /*
849 * If the transfer timed out and we didn't know how much to
850 * expect, assume the worst (i.e. we didn't get all of it)
851 */
852 if (sigalrm && us.size == -1) {
853 warnx("%s may be truncated", path);
854 goto failure_keep;
855 }
856
857 success:
858 r = 0;
859 if (tmppath != NULL && rename(tmppath, path) == -1) {
860 warn("%s: rename()", path);
861 goto failure_keep;
862 }
863 goto done;
864 failure:
865 if (of && of != stdout && !R_flag && !r_flag)
866 if (stat(path, &sb) != -1 && (sb.st_mode & S_IFREG))
867 unlink(tmppath ? tmppath : path);
868 if (R_flag && tmppath != NULL && sb.st_size == -1)
869 rename(tmppath, path); /* ignore errors here */
870 failure_keep:
871 r = -1;
872 goto done;
873 done:
874 if (f)
875 fclose(f);
876 if (of && of != stdout)
877 fclose(of);
878 if (url)
879 fetchFreeURL(url);
880 if (tmppath != NULL)
881 free(tmppath);
882 return (r);
883 }
884
885 static void
usage(void)886 usage(void)
887 {
888 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",
889 "usage: fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]",
890 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]",
891 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]",
892 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]",
893 " [-o file] [--referer=URL] [-S bytes] [-T seconds]",
894 " [--user-agent=agent-string] [-w seconds] URL ...",
895 " fetch [-146AadFlMmnPpqRrsUv] [-B bytes] [--bind-address=host]",
896 " [--ca-cert=file] [--ca-path=dir] [--cert=file] [--crl=file]",
897 " [-i file] [--key=file] [-N file] [--no-passive] [--no-proxy=list]",
898 " [--no-sslv3] [--no-tlsv1] [--no-verify-hostname] [--no-verify-peer]",
899 " [-o file] [--referer=URL] [-S bytes] [-T seconds]",
900 " [--user-agent=agent-string] [-w seconds] -h host -f file [-c dir]");
901 }
902
903
904 /*
905 * Entry point
906 */
907 int
main(int argc,char * argv[])908 main(int argc, char *argv[])
909 {
910 struct stat sb;
911 struct sigaction sa;
912 const char *p, *s;
913 char *end, *q;
914 int c, e, is_http, r;
915
916
917 while ((c = getopt_long(argc, argv,
918 "146AaB:bc:dFf:Hh:i:lMmN:nPpo:qRrS:sT:tUvw:",
919 longopts, NULL)) != -1)
920 switch (c) {
921 case '1':
922 once_flag = 1;
923 break;
924 case '4':
925 family = PF_INET;
926 break;
927 case '6':
928 family = PF_INET6;
929 break;
930 case 'A':
931 A_flag = 1;
932 break;
933 case 'a':
934 a_flag = 1;
935 break;
936 case 'B':
937 B_size = (off_t)strtol(optarg, &end, 10);
938 if (*optarg == '\0' || *end != '\0')
939 errx(1, "invalid buffer size (%s)", optarg);
940 break;
941 case 'b':
942 warnx("warning: the -b option is deprecated");
943 b_flag = 1;
944 break;
945 case 'c':
946 c_dirname = optarg;
947 break;
948 case 'd':
949 d_flag = 1;
950 break;
951 case 'F':
952 F_flag = 1;
953 break;
954 case 'f':
955 f_filename = optarg;
956 break;
957 case 'H':
958 warnx("the -H option is now implicit, "
959 "use -U to disable");
960 break;
961 case 'h':
962 h_hostname = optarg;
963 break;
964 case 'i':
965 i_flag = 1;
966 i_filename = optarg;
967 break;
968 case 'l':
969 l_flag = 1;
970 break;
971 case 'o':
972 o_flag = 1;
973 o_filename = optarg;
974 break;
975 case 'M':
976 case 'm':
977 if (r_flag)
978 errx(1, "the -m and -r flags "
979 "are mutually exclusive");
980 m_flag = 1;
981 break;
982 case 'N':
983 N_filename = optarg;
984 break;
985 case 'n':
986 n_flag = 1;
987 break;
988 case 'P':
989 case 'p':
990 p_flag = 1;
991 break;
992 case 'q':
993 v_level = 0;
994 break;
995 case 'R':
996 R_flag = 1;
997 break;
998 case 'r':
999 if (m_flag)
1000 errx(1, "the -m and -r flags "
1001 "are mutually exclusive");
1002 r_flag = 1;
1003 break;
1004 case 'S':
1005 S_size = strtoll(optarg, &end, 10);
1006 if (*optarg == '\0' || *end != '\0')
1007 errx(1, "invalid size (%s)", optarg);
1008 break;
1009 case 's':
1010 s_flag = 1;
1011 break;
1012 case 'T':
1013 T_secs = strtol(optarg, &end, 10);
1014 if (*optarg == '\0' || *end != '\0')
1015 errx(1, "invalid timeout (%s)", optarg);
1016 break;
1017 case 't':
1018 t_flag = 1;
1019 warnx("warning: the -t option is deprecated");
1020 break;
1021 case 'U':
1022 U_flag = 1;
1023 break;
1024 case 'v':
1025 v_level++;
1026 break;
1027 case 'w':
1028 a_flag = 1;
1029 w_secs = strtol(optarg, &end, 10);
1030 if (*optarg == '\0' || *end != '\0')
1031 errx(1, "invalid delay (%s)", optarg);
1032 break;
1033 case OPTION_BIND_ADDRESS:
1034 setenv("FETCH_BIND_ADDRESS", optarg, 1);
1035 break;
1036 case OPTION_NO_FTP_PASSIVE_MODE:
1037 setenv("FTP_PASSIVE_MODE", "no", 1);
1038 break;
1039 case OPTION_HTTP_REFERER:
1040 setenv("HTTP_REFERER", optarg, 1);
1041 break;
1042 case OPTION_HTTP_USER_AGENT:
1043 setenv("HTTP_USER_AGENT", optarg, 1);
1044 break;
1045 case OPTION_NO_PROXY:
1046 setenv("NO_PROXY", optarg, 1);
1047 break;
1048 case OPTION_SSL_CA_CERT_FILE:
1049 setenv("SSL_CA_CERT_FILE", optarg, 1);
1050 break;
1051 case OPTION_SSL_CA_CERT_PATH:
1052 setenv("SSL_CA_CERT_PATH", optarg, 1);
1053 break;
1054 case OPTION_SSL_CLIENT_CERT_FILE:
1055 setenv("SSL_CLIENT_CERT_FILE", optarg, 1);
1056 break;
1057 case OPTION_SSL_CLIENT_KEY_FILE:
1058 setenv("SSL_CLIENT_KEY_FILE", optarg, 1);
1059 break;
1060 case OPTION_SSL_CRL_FILE:
1061 setenv("SSL_CLIENT_CRL_FILE", optarg, 1);
1062 break;
1063 case OPTION_SSL_NO_SSL3:
1064 setenv("SSL_NO_SSL3", "", 1);
1065 break;
1066 case OPTION_SSL_NO_TLS1:
1067 setenv("SSL_NO_TLS1", "", 1);
1068 break;
1069 case OPTION_SSL_NO_VERIFY_HOSTNAME:
1070 setenv("SSL_NO_VERIFY_HOSTNAME", "", 1);
1071 break;
1072 case OPTION_SSL_NO_VERIFY_PEER:
1073 setenv("SSL_NO_VERIFY_PEER", "", 1);
1074 break;
1075 default:
1076 usage();
1077 exit(1);
1078 }
1079
1080 argc -= optind;
1081 argv += optind;
1082
1083 if (h_hostname || f_filename || c_dirname) {
1084 if (!h_hostname || !f_filename || argc) {
1085 usage();
1086 exit(1);
1087 }
1088 /* XXX this is a hack. */
1089 if (strcspn(h_hostname, "@:/") != strlen(h_hostname))
1090 errx(1, "invalid hostname");
1091 if (asprintf(argv, "ftp://%s/%s/%s", h_hostname,
1092 c_dirname ? c_dirname : "", f_filename) == -1)
1093 errx(1, "%s", strerror(ENOMEM));
1094 argc++;
1095 }
1096
1097 if (!argc) {
1098 usage();
1099 exit(1);
1100 }
1101
1102 /* allocate buffer */
1103 if (B_size < MINBUFSIZE)
1104 B_size = MINBUFSIZE;
1105 if ((buf = malloc(B_size)) == NULL)
1106 errx(1, "%s", strerror(ENOMEM));
1107
1108 /* timeouts */
1109 if ((s = getenv("FTP_TIMEOUT")) != NULL) {
1110 ftp_timeout = strtol(s, &end, 10);
1111 if (*s == '\0' || *end != '\0' || ftp_timeout < 0) {
1112 warnx("FTP_TIMEOUT (%s) is not a positive integer", s);
1113 ftp_timeout = 0;
1114 }
1115 }
1116 if ((s = getenv("HTTP_TIMEOUT")) != NULL) {
1117 http_timeout = strtol(s, &end, 10);
1118 if (*s == '\0' || *end != '\0' || http_timeout < 0) {
1119 warnx("HTTP_TIMEOUT (%s) is not a positive integer", s);
1120 http_timeout = 0;
1121 }
1122 }
1123
1124 /* signal handling */
1125 sa.sa_flags = 0;
1126 sa.sa_handler = sig_handler;
1127 sigemptyset(&sa.sa_mask);
1128 sigaction(SIGALRM, &sa, NULL);
1129 sa.sa_flags = SA_RESETHAND;
1130 sigaction(SIGINT, &sa, NULL);
1131 fetchRestartCalls = 0;
1132
1133 /* output file */
1134 if (o_flag) {
1135 if (strcmp(o_filename, "-") == 0) {
1136 o_stdout = 1;
1137 } else if (stat(o_filename, &sb) == -1) {
1138 if (errno == ENOENT) {
1139 if (argc > 1)
1140 errx(1, "%s is not a directory",
1141 o_filename);
1142 } else {
1143 err(1, "%s", o_filename);
1144 }
1145 } else {
1146 if (sb.st_mode & S_IFDIR)
1147 o_directory = 1;
1148 }
1149 }
1150
1151 /* check if output is to a tty (for progress report) */
1152 v_tty = isatty(STDERR_FILENO);
1153 v_progress = v_tty && v_level > 0;
1154 if (v_progress)
1155 pgrp = getpgrp();
1156
1157 r = 0;
1158
1159 /* authentication */
1160 if (v_tty)
1161 fetchAuthMethod = query_auth;
1162 if (N_filename != NULL)
1163 if (setenv("NETRC", N_filename, 1) == -1)
1164 err(1, "setenv: cannot set NETRC=%s", N_filename);
1165
1166 while (argc) {
1167 if ((p = strrchr(*argv, '/')) == NULL)
1168 p = *argv;
1169 else
1170 p++;
1171
1172 if (!*p)
1173 p = "fetch.out";
1174
1175 fetchLastErrCode = 0;
1176
1177 if (o_flag) {
1178 if (o_stdout) {
1179 e = fetch(*argv, "-", &is_http);
1180 } else if (o_directory) {
1181 asprintf(&q, "%s/%s", o_filename, p);
1182 e = fetch(*argv, q, &is_http);
1183 free(q);
1184 } else {
1185 e = fetch(*argv, o_filename, &is_http);
1186 }
1187 } else {
1188 e = fetch(*argv, p, &is_http);
1189 }
1190
1191 if (sigint)
1192 kill(getpid(), SIGINT);
1193
1194 if (e == 0 && once_flag)
1195 exit(0);
1196
1197 if (e) {
1198 r = 1;
1199 if ((fetchLastErrCode
1200 && fetchLastErrCode != FETCH_AUTH
1201 && fetchLastErrCode != FETCH_UNAVAIL
1202 && fetchLastErrCode != FETCH_MOVED
1203 && fetchLastErrCode != FETCH_URL
1204 && fetchLastErrCode != FETCH_RESOLV
1205 && fetchLastErrCode != FETCH_UNKNOWN
1206 && (!is_http || (
1207 fetchLastErrCode != FETCH_PROTO
1208 && fetchLastErrCode != FETCH_SERVER
1209 && fetchLastErrCode != FETCH_TEMP
1210 && fetchLastErrCode != FETCH_TIMEOUT
1211 )))) {
1212 if (w_secs && v_level)
1213 fprintf(stderr, "Waiting %ld seconds "
1214 "before retrying\n", w_secs);
1215 if (w_secs)
1216 sleep(w_secs);
1217 if (a_flag)
1218 continue;
1219 }
1220 }
1221
1222 argc--, argv++;
1223 }
1224
1225 exit(r);
1226 }
1227