1 /* File Transfer Protocol support.
2 Copyright (C) 1996-2005 Free Software Foundation, Inc.
4 This file is part of GNU Wget.
6 GNU Wget is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 GNU Wget is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with Wget; if not, write to the Free Software Foundation, Inc.,
18 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 In addition, as a special exception, the Free Software Foundation
21 gives permission to link the code of its release of Wget with the
22 OpenSSL project's "OpenSSL" library (or with modified versions of it
23 that use the same license as the "OpenSSL" library), and distribute
24 the linked executables. You must obey the GNU General Public License
25 in all respects for all of the code used other than "OpenSSL". If you
26 modify this file, you may extend this exception to your version of the
27 file, but you are not obligated to do so. If you do not wish to do
28 so, delete this exception statement from your version. */
49 #include "convert.h" /* for downloaded_file */
50 #include "recur.h" /* for INFINITE_RECURSION */
52 /* File where the "ls -al" listing will be saved. */
53 #define LIST_FILENAME ".listing"
57 int st; /* connection status */
58 int cmd; /* command code */
59 int csock; /* control connection socket */
60 double dltime; /* time of the download in msecs */
61 enum stype rs; /* remote system reported by ftp server */
62 char *id; /* initial directory */
63 char *target; /* target file name */
64 struct url *proxy; /* FTWK-style proxy */
68 /* Look for regexp "( *[0-9]+ *byte" (literal parenthesis) anywhere in
69 the string S, and return the number converted to wgint, if found, 0
72 ftp_expected_bytes (const char *s)
78 while (*s && *s != '(')
82 ++s; /* skip the '(' */
83 res = str_to_wgint (s, (char **) &s, 10);
86 while (*s && ISSPACE (*s))
90 if (TOLOWER (*s) != 'b')
92 if (strncasecmp (s, "byte", 4))
102 * This function sets up a passive data connection with the FTP server.
103 * It is merely a wrapper around ftp_epsv, ftp_lpsv and ftp_pasv.
106 ftp_do_pasv (int csock, ip_address *addr, int *port)
110 /* We need to determine the address family and need to call
111 getpeername, so while we're at it, store the address to ADDR.
112 ftp_pasv and ftp_lpsv can simply override it. */
113 if (!socket_ip_address (csock, addr, ENDPOINT_PEER))
116 /* If our control connection is over IPv6, then we first try EPSV and then
117 * LPSV if the former is not supported. If the control connection is over
118 * IPv4, we simply issue the good old PASV request. */
122 if (!opt.server_response)
123 logputs (LOG_VERBOSE, "==> PASV ... ");
124 err = ftp_pasv (csock, addr, port);
127 if (!opt.server_response)
128 logputs (LOG_VERBOSE, "==> EPSV ... ");
129 err = ftp_epsv (csock, addr, port);
131 /* If EPSV is not supported try LPSV */
132 if (err == FTPNOPASV)
134 if (!opt.server_response)
135 logputs (LOG_VERBOSE, "==> LPSV ... ");
136 err = ftp_lpsv (csock, addr, port);
147 * This function sets up an active data connection with the FTP server.
148 * It is merely a wrapper around ftp_eprt, ftp_lprt and ftp_port.
151 ftp_do_port (int csock, int *local_sock)
156 if (!socket_ip_address (csock, &cip, ENDPOINT_PEER))
159 /* If our control connection is over IPv6, then we first try EPRT and then
160 * LPRT if the former is not supported. If the control connection is over
161 * IPv4, we simply issue the good old PORT request. */
165 if (!opt.server_response)
166 logputs (LOG_VERBOSE, "==> PORT ... ");
167 err = ftp_port (csock, local_sock);
170 if (!opt.server_response)
171 logputs (LOG_VERBOSE, "==> EPRT ... ");
172 err = ftp_eprt (csock, local_sock);
174 /* If EPRT is not supported try LPRT */
175 if (err == FTPPORTERR)
177 if (!opt.server_response)
178 logputs (LOG_VERBOSE, "==> LPRT ... ");
179 err = ftp_lprt (csock, local_sock);
190 ftp_do_pasv (int csock, ip_address *addr, int *port)
192 if (!opt.server_response)
193 logputs (LOG_VERBOSE, "==> PASV ... ");
194 return ftp_pasv (csock, addr, port);
198 ftp_do_port (int csock, int *local_sock)
200 if (!opt.server_response)
201 logputs (LOG_VERBOSE, "==> PORT ... ");
202 return ftp_port (csock, local_sock);
207 print_length (wgint size, wgint start, bool authoritative)
209 logprintf (LOG_VERBOSE, _("Length: %s"), number_to_static_string (size));
211 logprintf (LOG_VERBOSE, " (%s)", human_readable (size));
215 logprintf (LOG_VERBOSE, _(", %s (%s) remaining"),
216 number_to_static_string (size - start),
217 human_readable (size - start));
219 logprintf (LOG_VERBOSE, _(", %s remaining"),
220 number_to_static_string (size - start));
222 logputs (LOG_VERBOSE, !authoritative ? _(" (unauthoritative)\n") : "\n");
225 /* Retrieves a file with denoted parameters through opening an FTP
226 connection to the server. It always closes the data connection,
227 and closes the control connection in case of error. */
229 getftp (struct url *u, wgint *len, wgint restval, ccon *con)
231 int csock, dtsock, local_sock, res;
232 uerr_t err = RETROK; /* appease the compiler */
234 char *user, *passwd, *respline;
238 bool pasv_mode_open = false;
239 wgint expected_bytes = 0;
240 bool rest_failed = false;
244 assert (con != NULL);
245 assert (con->target != NULL);
247 /* Debug-check of the sanity of the request by making sure that LIST
248 and RETR are never both requested (since we can handle only one
250 assert (!((cmd & DO_LIST) && (cmd & DO_RETR)));
251 /* Make sure that at least *something* is requested. */
252 assert ((cmd & (DO_LIST | DO_CWD | DO_RETR | DO_LOGIN)) != 0);
256 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 1);
257 user = user ? user : (opt.ftp_user ? opt.ftp_user : opt.user);
258 if (!user) user = "anonymous";
259 passwd = passwd ? passwd : (opt.ftp_passwd ? opt.ftp_passwd : opt.passwd);
260 if (!passwd) passwd = "-wget@";
266 if (!(cmd & DO_LOGIN))
268 else /* cmd & DO_LOGIN */
271 char *host = con->proxy ? con->proxy->host : u->host;
272 int port = con->proxy ? con->proxy->port : u->port;
273 char *logname = user;
277 /* If proxy is in use, log in as username@target-site. */
278 logname = concat_strings (user, "@", u->host, (char *) 0);
281 /* Login to the server: */
283 /* First: Establish the control connection. */
285 csock = connect_to_host (host, port);
289 return (retryable_socket_connect_error (errno)
290 ? CONERROR : CONIMPOSSIBLE);
292 if (cmd & LEAVE_PENDING)
297 /* Second: Login with proper USER/PASS sequence. */
298 logprintf (LOG_VERBOSE, _("Logging in as %s ... "), escnonprint (user));
299 if (opt.server_response)
300 logputs (LOG_ALWAYS, "\n");
301 err = ftp_login (csock, logname, passwd);
306 /* FTPRERR, FTPSRVERR, WRITEFAILED, FTPLOGREFUSED, FTPLOGINC */
310 logputs (LOG_VERBOSE, "\n");
311 logputs (LOG_NOTQUIET, _("\
312 Error in server response, closing control connection.\n"));
317 logputs (LOG_VERBOSE, "\n");
318 logputs (LOG_NOTQUIET, _("Error in server greeting.\n"));
323 logputs (LOG_VERBOSE, "\n");
324 logputs (LOG_NOTQUIET,
325 _("Write failed, closing control connection.\n"));
330 logputs (LOG_VERBOSE, "\n");
331 logputs (LOG_NOTQUIET, _("The server refuses login.\n"));
334 return FTPLOGREFUSED;
336 logputs (LOG_VERBOSE, "\n");
337 logputs (LOG_NOTQUIET, _("Login incorrect.\n"));
342 if (!opt.server_response)
343 logputs (LOG_VERBOSE, _("Logged in!\n"));
348 /* Third: Get the system type */
349 if (!opt.server_response)
350 logprintf (LOG_VERBOSE, "==> SYST ... ");
351 err = ftp_syst (csock, &con->rs);
356 logputs (LOG_VERBOSE, "\n");
357 logputs (LOG_NOTQUIET, _("\
358 Error in server response, closing control connection.\n"));
363 logputs (LOG_VERBOSE, "\n");
364 logputs (LOG_NOTQUIET,
365 _("Server error, can't determine system type.\n"));
368 /* Everything is OK. */
373 if (!opt.server_response && err != FTPSRVERR)
374 logputs (LOG_VERBOSE, _("done. "));
376 /* Fourth: Find the initial ftp directory */
378 if (!opt.server_response)
379 logprintf (LOG_VERBOSE, "==> PWD ... ");
380 err = ftp_pwd (csock, &con->id);
385 logputs (LOG_VERBOSE, "\n");
386 logputs (LOG_NOTQUIET, _("\
387 Error in server response, closing control connection.\n"));
392 /* PWD unsupported -- assume "/". */
393 xfree_null (con->id);
394 con->id = xstrdup ("/");
397 /* Everything is OK. */
402 /* VMS will report something like "PUB$DEVICE:[INITIAL.FOLDER]".
403 Convert it to "/INITIAL/FOLDER" */
404 if (con->rs == ST_VMS)
406 char *path = strchr (con->id, '[');
407 char *pathend = path ? strchr (path + 1, ']') : NULL;
408 if (!path || !pathend)
409 DEBUGP (("Initial VMS directory not in the form [...]!\n"));
412 char *idir = con->id;
413 DEBUGP (("Preprocessing the initial VMS directory\n"));
414 DEBUGP ((" old = '%s'\n", con->id));
415 /* We do the conversion in-place by copying the stuff
416 between [ and ] to the beginning, and changing dots
417 to slashes at the same time. */
419 for (++path; path < pathend; path++, idir++)
420 *idir = *path == '.' ? '/' : *path;
422 DEBUGP ((" new = '%s'\n\n", con->id));
425 if (!opt.server_response)
426 logputs (LOG_VERBOSE, _("done.\n"));
428 /* Fifth: Set the FTP type. */
429 type_char = ftp_process_type (u->params);
430 if (!opt.server_response)
431 logprintf (LOG_VERBOSE, "==> TYPE %c ... ", type_char);
432 err = ftp_type (csock, type_char);
433 /* FTPRERR, WRITEFAILED, FTPUNKNOWNTYPE */
437 logputs (LOG_VERBOSE, "\n");
438 logputs (LOG_NOTQUIET, _("\
439 Error in server response, closing control connection.\n"));
444 logputs (LOG_VERBOSE, "\n");
445 logputs (LOG_NOTQUIET,
446 _("Write failed, closing control connection.\n"));
451 logputs (LOG_VERBOSE, "\n");
452 logprintf (LOG_NOTQUIET,
453 _("Unknown type `%c', closing control connection.\n"),
459 /* Everything is OK. */
464 if (!opt.server_response)
465 logputs (LOG_VERBOSE, _("done. "));
471 logputs (LOG_VERBOSE, _("==> CWD not needed.\n"));
474 char *target = u->dir;
476 DEBUGP (("changing working directory\n"));
478 /* Change working directory. To change to a non-absolute
479 Unix directory, we need to prepend initial directory
480 (con->id) to it. Absolute directories "just work".
482 A relative directory is one that does not begin with '/'
483 and, on non-Unix OS'es, one that doesn't begin with
486 This is not done for OS400, which doesn't use
487 "/"-delimited directories, nor does it support directory
488 hierarchies. "CWD foo" followed by "CWD bar" leaves us
489 in "bar", not in "foo/bar", as would be customary
493 && !(con->rs != ST_UNIX
494 && ISALPHA (target[0])
496 && con->rs != ST_OS400)
498 int idlen = strlen (con->id);
501 /* Strip trailing slash(es) from con->id. */
502 while (idlen > 0 && con->id[idlen - 1] == '/')
504 p = ntarget = (char *)alloca (idlen + 1 + strlen (u->dir) + 1);
505 memcpy (p, con->id, idlen);
510 DEBUGP (("Prepended initial PWD to relative path:\n"));
511 DEBUGP ((" pwd: '%s'\n old: '%s'\n new: '%s'\n",
512 con->id, target, ntarget));
516 /* If the FTP host runs VMS, we will have to convert the absolute
517 directory path in UNIX notation to absolute directory path in
518 VMS notation as VMS FTP servers do not like UNIX notation of
519 absolute paths. "VMS notation" is [dir.subdir.subsubdir]. */
521 if (con->rs == ST_VMS)
524 char *ntarget = (char *)alloca (strlen (target) + 2);
525 /* We use a converted initial dir, so directories in
526 TARGET will be separated with slashes, something like
527 "/INITIAL/FOLDER/DIR/SUBDIR". Convert that to
528 "[INITIAL.FOLDER.DIR.SUBDIR]". */
529 strcpy (ntarget, target);
530 assert (*ntarget == '/');
532 for (tmpp = ntarget + 1; *tmpp; tmpp++)
537 DEBUGP (("Changed file name to VMS syntax:\n"));
538 DEBUGP ((" Unix: '%s'\n VMS: '%s'\n", target, ntarget));
542 if (!opt.server_response)
543 logprintf (LOG_VERBOSE, "==> CWD %s ... ", escnonprint (target));
544 err = ftp_cwd (csock, target);
545 /* FTPRERR, WRITEFAILED, FTPNSFOD */
549 logputs (LOG_VERBOSE, "\n");
550 logputs (LOG_NOTQUIET, _("\
551 Error in server response, closing control connection.\n"));
556 logputs (LOG_VERBOSE, "\n");
557 logputs (LOG_NOTQUIET,
558 _("Write failed, closing control connection.\n"));
563 logputs (LOG_VERBOSE, "\n");
564 logprintf (LOG_NOTQUIET, _("No such directory `%s'.\n\n"),
565 escnonprint (u->dir));
574 if (!opt.server_response)
575 logputs (LOG_VERBOSE, _("done.\n"));
578 else /* do not CWD */
579 logputs (LOG_VERBOSE, _("==> CWD not required.\n"));
581 if ((cmd & DO_RETR) && *len == 0)
585 if (!opt.server_response)
586 logprintf (LOG_VERBOSE, "==> SIZE %s ... ", escnonprint (u->file));
589 err = ftp_size (csock, u->file, len);
595 logputs (LOG_VERBOSE, "\n");
596 logputs (LOG_NOTQUIET, _("\
597 Error in server response, closing control connection.\n"));
602 /* Everything is OK. */
607 if (!opt.server_response)
608 logprintf (LOG_VERBOSE, *len ? "%s\n" : _("done.\n"),
609 number_to_static_string (*len));
612 /* If anything is to be retrieved, PORT (or PASV) must be sent. */
613 if (cmd & (DO_LIST | DO_RETR))
617 ip_address passive_addr;
619 err = ftp_do_pasv (csock, &passive_addr, &passive_port);
620 /* FTPRERR, WRITEFAILED, FTPNOPASV, FTPINVPASV */
624 logputs (LOG_VERBOSE, "\n");
625 logputs (LOG_NOTQUIET, _("\
626 Error in server response, closing control connection.\n"));
631 logputs (LOG_VERBOSE, "\n");
632 logputs (LOG_NOTQUIET,
633 _("Write failed, closing control connection.\n"));
638 logputs (LOG_VERBOSE, "\n");
639 logputs (LOG_NOTQUIET, _("Cannot initiate PASV transfer.\n"));
642 logputs (LOG_VERBOSE, "\n");
643 logputs (LOG_NOTQUIET, _("Cannot parse PASV response.\n"));
652 DEBUGP (("trying to connect to %s port %d\n",
653 print_address (&passive_addr), passive_port));
654 dtsock = connect_to_ip (&passive_addr, passive_port, NULL);
657 int save_errno = errno;
660 logprintf (LOG_VERBOSE, _("couldn't connect to %s port %d: %s\n"),
661 print_address (&passive_addr), passive_port,
662 strerror (save_errno));
663 return (retryable_socket_connect_error (save_errno)
664 ? CONERROR : CONIMPOSSIBLE);
667 pasv_mode_open = true; /* Flag to avoid accept port */
668 if (!opt.server_response)
669 logputs (LOG_VERBOSE, _("done. "));
673 if (!pasv_mode_open) /* Try to use a port command if PASV failed */
675 err = ftp_do_port (csock, &local_sock);
676 /* FTPRERR, WRITEFAILED, bindport (FTPSYSERR), HOSTERR,
681 logputs (LOG_VERBOSE, "\n");
682 logputs (LOG_NOTQUIET, _("\
683 Error in server response, closing control connection.\n"));
687 fd_close (local_sock);
690 logputs (LOG_VERBOSE, "\n");
691 logputs (LOG_NOTQUIET,
692 _("Write failed, closing control connection.\n"));
696 fd_close (local_sock);
699 logputs (LOG_VERBOSE, "\n");
700 logprintf (LOG_NOTQUIET, "socket: %s\n", strerror (errno));
704 fd_close (local_sock);
707 logputs (LOG_VERBOSE, "\n");
708 logprintf (LOG_NOTQUIET, _("Bind error (%s).\n"),
713 logputs (LOG_VERBOSE, "\n");
714 logputs (LOG_NOTQUIET, _("Invalid PORT.\n"));
718 fd_close (local_sock);
725 if (!opt.server_response)
726 logputs (LOG_VERBOSE, _("done. "));
728 } /* cmd & (DO_LIST | DO_RETR) */
730 /* Restart if needed. */
731 if (restval && (cmd & DO_RETR))
733 if (!opt.server_response)
734 logprintf (LOG_VERBOSE, "==> REST %s ... ",
735 number_to_static_string (restval));
736 err = ftp_rest (csock, restval);
738 /* FTPRERR, WRITEFAILED, FTPRESTFAIL */
742 logputs (LOG_VERBOSE, "\n");
743 logputs (LOG_NOTQUIET, _("\
744 Error in server response, closing control connection.\n"));
748 fd_close (local_sock);
751 logputs (LOG_VERBOSE, "\n");
752 logputs (LOG_NOTQUIET,
753 _("Write failed, closing control connection.\n"));
757 fd_close (local_sock);
760 logputs (LOG_VERBOSE, _("\nREST failed, starting from scratch.\n"));
768 if (err != FTPRESTFAIL && !opt.server_response)
769 logputs (LOG_VERBOSE, _("done. "));
770 } /* restval && cmd & DO_RETR */
774 /* If we're in spider mode, don't really retrieve anything. The
775 fact that we got to this point should be proof enough that
776 the file exists, vaguely akin to HTTP's concept of a "HEAD"
783 fd_close (local_sock);
789 if (!opt.server_response)
792 logputs (LOG_VERBOSE, "\n");
793 logprintf (LOG_VERBOSE, "==> RETR %s ... ", escnonprint (u->file));
797 err = ftp_retr (csock, u->file);
798 /* FTPRERR, WRITEFAILED, FTPNSFOD */
802 logputs (LOG_VERBOSE, "\n");
803 logputs (LOG_NOTQUIET, _("\
804 Error in server response, closing control connection.\n"));
808 fd_close (local_sock);
811 logputs (LOG_VERBOSE, "\n");
812 logputs (LOG_NOTQUIET,
813 _("Write failed, closing control connection.\n"));
817 fd_close (local_sock);
820 logputs (LOG_VERBOSE, "\n");
821 logprintf (LOG_NOTQUIET, _("No such file `%s'.\n\n"),
822 escnonprint (u->file));
824 fd_close (local_sock);
832 if (!opt.server_response)
833 logputs (LOG_VERBOSE, _("done.\n"));
834 expected_bytes = ftp_expected_bytes (ftp_last_respline);
839 if (!opt.server_response)
840 logputs (LOG_VERBOSE, "==> LIST ... ");
841 /* As Maciej W. Rozycki (macro@ds2.pg.gda.pl) says, `LIST'
842 without arguments is better than `LIST .'; confirmed by
844 err = ftp_list (csock, NULL);
845 /* FTPRERR, WRITEFAILED */
849 logputs (LOG_VERBOSE, "\n");
850 logputs (LOG_NOTQUIET, _("\
851 Error in server response, closing control connection.\n"));
855 fd_close (local_sock);
858 logputs (LOG_VERBOSE, "\n");
859 logputs (LOG_NOTQUIET,
860 _("Write failed, closing control connection.\n"));
864 fd_close (local_sock);
867 logputs (LOG_VERBOSE, "\n");
868 logprintf (LOG_NOTQUIET, _("No such file or directory `%s'.\n\n"),
871 fd_close (local_sock);
878 if (!opt.server_response)
879 logputs (LOG_VERBOSE, _("done.\n"));
880 expected_bytes = ftp_expected_bytes (ftp_last_respline);
881 } /* cmd & DO_LIST */
883 if (!(cmd & (DO_LIST | DO_RETR)) || (opt.spider && !(cmd & DO_LIST)))
886 /* Some FTP servers return the total length of file after REST
887 command, others just return the remaining size. */
888 if (*len && restval && expected_bytes
889 && (expected_bytes == *len - restval))
891 DEBUGP (("Lying FTP server found, adjusting.\n"));
892 expected_bytes = *len;
895 /* If no transmission was required, then everything is OK. */
896 if (!pasv_mode_open) /* we are not using pasive mode so we need
899 /* Wait for the server to connect to the address we're waiting
901 dtsock = accept_connection (local_sock);
904 logprintf (LOG_NOTQUIET, "accept: %s\n", strerror (errno));
909 /* Open the file -- if output_stream is set, use it instead. */
910 if (!output_stream || con->cmd & DO_LIST)
912 mkalldirs (con->target);
914 rotate_backups (con->target);
917 fp = fopen (con->target, "ab");
918 else if (opt.noclobber || opt.always_rest || opt.timestamping || opt.dirstruct
919 || opt.output_document)
920 fp = fopen (con->target, "wb");
923 fp = fopen_excl (con->target, true);
924 if (!fp && errno == EEXIST)
926 /* We cannot just invent a new name and use it (which is
927 what functions like unique_create typically do)
928 because we told the user we'd use this name.
929 Instead, return and retry the download. */
930 logprintf (LOG_NOTQUIET, _("%s has sprung into existence.\n"),
935 fd_close (local_sock);
936 return FOPEN_EXCL_ERR;
941 logprintf (LOG_NOTQUIET, "%s: %s\n", con->target, strerror (errno));
945 fd_close (local_sock);
954 print_length (*len, restval, true);
955 expected_bytes = *len; /* for fd_read_body's progress bar */
957 else if (expected_bytes)
958 print_length (expected_bytes, restval, false);
960 /* Get the contents of the document. */
962 if (restval && rest_failed)
963 flags |= rb_skip_startpos;
966 res = fd_read_body (dtsock, fp,
967 expected_bytes ? expected_bytes - restval : 0,
968 restval, &rd_size, len, &con->dltime, flags);
970 tms = time_str (NULL);
971 tmrate = retr_rate (rd_size, con->dltime);
972 total_download_time += con->dltime;
974 fd_close (local_sock);
975 /* Close the local file. */
976 if (!output_stream || con->cmd & DO_LIST)
979 /* If fd_read_body couldn't write to fp, bail out. */
982 logprintf (LOG_NOTQUIET, _("%s: %s, closing control connection.\n"),
983 con->target, strerror (errno));
991 logprintf (LOG_NOTQUIET, _("%s (%s) - Data connection: %s; "),
992 tms, tmrate, fd_errstr (dtsock));
993 if (opt.server_response)
994 logputs (LOG_ALWAYS, "\n");
998 /* Get the server to tell us if everything is retrieved. */
999 err = ftp_response (csock, &respline);
1003 /* The control connection is decidedly closed. Print the time
1004 only if it hasn't already been printed. */
1006 logprintf (LOG_NOTQUIET, "%s (%s) - ", tms, tmrate);
1007 logputs (LOG_NOTQUIET, _("Control connection closed.\n"));
1008 /* If there is an error on the control connection, close it, but
1009 return FTPRETRINT, since there is a possibility that the
1010 whole file was retrieved nevertheless (but that is for
1011 ftp_loop_internal to decide). */
1015 } /* err != FTPOK */
1016 /* If retrieval failed for any reason, return FTPRETRINT, but do not
1017 close socket, since the control connection is still alive. If
1018 there is something wrong with the control connection, it will
1019 become apparent later. */
1020 if (*respline != '2')
1024 logprintf (LOG_NOTQUIET, "%s (%s) - ", tms, tmrate);
1025 logputs (LOG_NOTQUIET, _("Data transfer aborted.\n"));
1032 /* What now? The data connection was erroneous, whereas the
1033 response says everything is OK. We shall play it safe. */
1037 if (!(cmd & LEAVE_PENDING))
1039 /* Closing the socket is faster than sending 'QUIT' and the
1040 effect is the same. */
1044 /* If it was a listing, and opt.server_response is true,
1046 if (opt.server_response && (con->cmd & DO_LIST))
1048 mkalldirs (con->target);
1049 fp = fopen (con->target, "r");
1051 logprintf (LOG_ALWAYS, "%s: %s\n", con->target, strerror (errno));
1055 /* The lines are being read with read_whole_line because of
1056 no-buffering on opt.lfile. */
1057 while ((line = read_whole_line (fp)) != NULL)
1059 char *p = strchr (line, '\0');
1060 while (p > line && (p[-1] == '\n' || p[-1] == '\r'))
1062 logprintf (LOG_ALWAYS, "%s\n", escnonprint (line));
1067 } /* con->cmd & DO_LIST && server_response */
1069 return RETRFINISHED;
1072 /* A one-file FTP loop. This is the part where FTP retrieval is
1073 retried, and retried, and retried, and...
1075 This loop either gets commands from con, or (if ON_YOUR_OWN is
1076 set), makes them up to retrieve the file given by the URL. */
1078 ftp_loop_internal (struct url *u, struct fileinfo *f, ccon *con)
1081 wgint restval, len = 0;
1083 const char *tmrate = NULL;
1088 con->target = url_file_name (u);
1090 if (opt.noclobber && file_exists_p (con->target))
1092 logprintf (LOG_VERBOSE,
1093 _("File `%s' already there; not retrieving.\n"), con->target);
1094 /* If the file is there, we suppose it's retrieved OK. */
1098 /* Remove it if it's a link. */
1099 remove_link (con->target);
1100 if (!opt.output_document)
1103 locf = opt.output_document;
1107 if (con->st & ON_YOUR_OWN)
1108 con->st = ON_YOUR_OWN;
1110 orig_lp = con->cmd & LEAVE_PENDING ? 1 : 0;
1115 /* Increment the pass counter. */
1117 sleep_between_retrievals (count);
1118 if (con->st & ON_YOUR_OWN)
1121 con->cmd |= (DO_RETR | LEAVE_PENDING);
1122 if (con->csock != -1)
1123 con->cmd &= ~ (DO_LOGIN | DO_CWD);
1125 con->cmd |= (DO_LOGIN | DO_CWD);
1127 else /* not on your own */
1129 if (con->csock != -1)
1130 con->cmd &= ~DO_LOGIN;
1132 con->cmd |= DO_LOGIN;
1133 if (con->st & DONE_CWD)
1134 con->cmd &= ~DO_CWD;
1139 /* Decide whether or not to restart. */
1141 && stat (locf, &st) == 0
1142 && S_ISREG (st.st_mode))
1143 /* When -c is used, continue from on-disk size. (Can't use
1144 hstat.len even if count>1 because we don't want a failed
1145 first attempt to clobber existing data.) */
1146 restval = st.st_size;
1148 restval = len; /* start where the previous run left off */
1152 /* Get the current time string. */
1153 tms = time_str (NULL);
1154 /* Print fetch message, if opt.verbose. */
1157 char *hurl = url_string (u, true);
1161 sprintf (tmp, _("(try:%2d)"), count);
1162 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
1163 tms, hurl, tmp, locf);
1165 ws_changetitle (hurl);
1169 /* Send getftp the proper length, if fileinfo was provided. */
1174 err = getftp (u, &len, restval, con);
1176 if (con->csock != -1)
1177 con->st &= ~DONE_CWD;
1179 con->st |= DONE_CWD;
1183 case HOSTERR: case CONIMPOSSIBLE: case FWRITEERR: case FOPENERR:
1184 case FTPNSFOD: case FTPLOGINC: case FTPNOPASV: case CONTNOTSUPPORTED:
1185 /* Fatal errors, give up. */
1187 case CONSOCKERR: case CONERROR: case FTPSRVERR: case FTPRERR:
1188 case WRITEFAILED: case FTPUNKNOWNTYPE: case FTPSYSERR:
1189 case FTPPORTERR: case FTPLOGREFUSED: case FTPINVPASV:
1190 case FOPEN_EXCL_ERR:
1191 printwhat (count, opt.ntry);
1192 /* non-fatal errors */
1193 if (err == FOPEN_EXCL_ERR)
1195 /* Re-determine the file name. */
1196 xfree_null (con->target);
1197 con->target = url_file_name (u);
1202 /* If the control connection was closed, the retrieval
1203 will be considered OK if f->size == len. */
1204 if (!f || len != f->size)
1206 printwhat (count, opt.ntry);
1217 tms = time_str (NULL);
1219 tmrate = retr_rate (len - restval, con->dltime);
1221 /* If we get out of the switch above without continue'ing, we've
1222 successfully downloaded a file. Remember this fact. */
1223 downloaded_file (FILE_DOWNLOADED_NORMALLY, locf);
1225 if (con->st & ON_YOUR_OWN)
1227 fd_close (con->csock);
1231 logprintf (LOG_VERBOSE, _("%s (%s) - `%s' saved [%s]\n\n"),
1232 tms, tmrate, locf, number_to_static_string (len));
1233 if (!opt.verbose && !opt.quiet)
1235 /* Need to hide the password from the URL. The `if' is here
1236 so that we don't do the needless allocation every
1238 char *hurl = url_string (u, true);
1239 logprintf (LOG_NONVERBOSE, "%s URL: %s [%s] -> \"%s\" [%d]\n",
1240 tms, hurl, number_to_static_string (len), locf, count);
1244 if ((con->cmd & DO_LIST))
1245 /* This is a directory listing file. */
1247 if (!opt.remove_listing)
1248 /* --dont-remove-listing was specified, so do count this towards the
1249 number of bytes and files downloaded. */
1251 total_downloaded_bytes += len;
1255 /* Deletion of listing files is not controlled by --delete-after, but
1256 by the more specific option --dont-remove-listing, and the code
1257 to do this deletion is in another function. */
1259 else if (!opt.spider)
1260 /* This is not a directory listing file. */
1262 /* Unlike directory listing files, don't pretend normal files weren't
1263 downloaded if they're going to be deleted. People seeding proxies,
1264 for instance, may want to know how many bytes and files they've
1265 downloaded through it. */
1266 total_downloaded_bytes += len;
1269 if (opt.delete_after)
1272 Removing file due to --delete-after in ftp_loop_internal():\n"));
1273 logprintf (LOG_VERBOSE, _("Removing %s.\n"), locf);
1275 logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
1279 /* Restore the original leave-pendingness. */
1281 con->cmd |= LEAVE_PENDING;
1283 con->cmd &= ~LEAVE_PENDING;
1285 } while (!opt.ntry || (count < opt.ntry));
1287 if (con->csock != -1 && (con->st & ON_YOUR_OWN))
1289 fd_close (con->csock);
1295 /* Return the directory listing in a reusable format. The directory
1296 is specifed in u->dir. */
1298 ftp_get_listing (struct url *u, ccon *con, struct fileinfo **f)
1301 char *uf; /* url file name */
1302 char *lf; /* list file name */
1303 char *old_target = con->target;
1305 con->st &= ~ON_YOUR_OWN;
1306 con->cmd |= (DO_LIST | LEAVE_PENDING);
1307 con->cmd &= ~DO_RETR;
1309 /* Find the listing file name. We do it by taking the file name of
1310 the URL and replacing the last component with the listing file
1312 uf = url_file_name (u);
1313 lf = file_merge (uf, LIST_FILENAME);
1315 DEBUGP ((_("Using `%s' as listing tmp file.\n"), lf));
1318 err = ftp_loop_internal (u, NULL, con);
1319 con->target = old_target;
1322 *f = ftp_parse_ls (lf, con->rs);
1325 if (opt.remove_listing)
1328 logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
1330 logprintf (LOG_VERBOSE, _("Removed `%s'.\n"), lf);
1333 con->cmd &= ~DO_LIST;
1337 static uerr_t ftp_retrieve_dirs (struct url *, struct fileinfo *, ccon *);
1338 static uerr_t ftp_retrieve_glob (struct url *, ccon *, int);
1339 static struct fileinfo *delelement (struct fileinfo *, struct fileinfo **);
1340 static void freefileinfo (struct fileinfo *f);
1342 /* Retrieve a list of files given in struct fileinfo linked list. If
1343 a file is a symbolic link, do not retrieve it, but rather try to
1344 set up a similar link on the local disk, if the symlinks are
1347 If opt.recursive is set, after all files have been retrieved,
1348 ftp_retrieve_dirs will be called to retrieve the directories. */
1350 ftp_retrieve_list (struct url *u, struct fileinfo *f, ccon *con)
1352 static int depth = 0;
1354 struct fileinfo *orig;
1359 /* Increase the depth. */
1361 if (opt.reclevel != INFINITE_RECURSION && depth > opt.reclevel)
1363 DEBUGP ((_("Recursion depth %d exceeded max. depth %d.\n"),
1364 depth, opt.reclevel));
1372 con->st &= ~ON_YOUR_OWN;
1373 if (!(con->st & DONE_CWD))
1376 con->cmd &= ~DO_CWD;
1377 con->cmd |= (DO_RETR | LEAVE_PENDING);
1380 con->cmd |= DO_LOGIN;
1382 con->cmd &= ~DO_LOGIN;
1384 err = RETROK; /* in case it's not used */
1388 char *old_target, *ofile;
1390 if (opt.quota && total_downloaded_bytes > opt.quota)
1395 old_target = con->target;
1397 ofile = xstrdup (u->file);
1398 url_set_file (u, f->name);
1400 con->target = url_file_name (u);
1404 if (opt.timestamping && f->type == FT_PLAINFILE)
1407 /* If conversion of HTML files retrieved via FTP is ever implemented,
1408 we'll need to stat() <file>.orig here when -K has been specified.
1409 I'm not implementing it now since files on an FTP server are much
1410 more likely than files on an HTTP server to legitimately have a
1412 if (!stat (con->target, &st))
1416 /* Else, get it from the file. */
1417 local_size = st.st_size;
1420 /* Modification time granularity is 2 seconds for Windows, so
1421 increase local time by 1 second for later comparison. */
1424 /* Compare file sizes only for servers that tell us correct
1425 values. Assumme sizes being equal for servers that lie
1427 cor_val = (con->rs == ST_UNIX || con->rs == ST_WINNT);
1428 eq_size = cor_val ? (local_size == f->size) : true;
1429 if (f->tstamp <= tml && eq_size)
1431 /* Remote file is older, file sizes can be compared and
1433 logprintf (LOG_VERBOSE, _("\
1434 Remote file no newer than local file `%s' -- not retrieving.\n"), con->target);
1439 /* Remote file is newer or sizes cannot be matched */
1440 logprintf (LOG_VERBOSE, _("\
1441 Remote file is newer than local file `%s' -- retrieving.\n\n"),
1446 /* Sizes do not match */
1447 logprintf (LOG_VERBOSE, _("\
1448 The sizes do not match (local %s) -- retrieving.\n\n"),
1449 number_to_static_string (local_size));
1452 } /* opt.timestamping && f->type == FT_PLAINFILE */
1456 /* If opt.retr_symlinks is defined, we treat symlinks as
1457 if they were normal files. There is currently no way
1458 to distinguish whether they might be directories, and
1460 if (!opt.retr_symlinks)
1464 logputs (LOG_NOTQUIET,
1465 _("Invalid name of the symlink, skipping.\n"));
1469 /* Check whether we already have the correct
1471 int rc = lstat (con->target, &st);
1474 size_t len = strlen (f->linkto) + 1;
1475 if (S_ISLNK (st.st_mode))
1477 char *link_target = (char *)alloca (len);
1478 size_t n = readlink (con->target, link_target, len);
1480 && (memcmp (link_target, f->linkto, n) == 0))
1482 logprintf (LOG_VERBOSE, _("\
1483 Already have correct symlink %s -> %s\n\n"),
1484 con->target, escnonprint (f->linkto));
1490 logprintf (LOG_VERBOSE, _("Creating symlink %s -> %s\n"),
1491 con->target, escnonprint (f->linkto));
1492 /* Unlink before creating symlink! */
1493 unlink (con->target);
1494 if (symlink (f->linkto, con->target) == -1)
1495 logprintf (LOG_NOTQUIET, "symlink: %s\n", strerror (errno));
1496 logputs (LOG_VERBOSE, "\n");
1497 } /* have f->linkto */
1498 #else /* not HAVE_SYMLINK */
1499 logprintf (LOG_NOTQUIET,
1500 _("Symlinks not supported, skipping symlink `%s'.\n"),
1502 #endif /* not HAVE_SYMLINK */
1504 else /* opt.retr_symlinks */
1507 err = ftp_loop_internal (u, f, con);
1508 } /* opt.retr_symlinks */
1512 logprintf (LOG_NOTQUIET, _("Skipping directory `%s'.\n"),
1513 escnonprint (f->name));
1516 /* Call the retrieve loop. */
1518 err = ftp_loop_internal (u, f, con);
1521 logprintf (LOG_NOTQUIET, _("%s: unknown/unsupported file type.\n"),
1522 escnonprint (f->name));
1526 /* Set the time-stamp information to the local file. Symlinks
1527 are not to be stamped because it sets the stamp on the
1529 if (!(f->type == FT_SYMLINK && !opt.retr_symlinks)
1532 && file_exists_p (con->target))
1534 /* #### This code repeats in http.c and ftp.c. Move it to a
1536 const char *fl = NULL;
1537 if (opt.output_document)
1539 if (output_stream_regular)
1540 fl = opt.output_document;
1545 touch (fl, f->tstamp);
1547 else if (f->tstamp == -1)
1548 logprintf (LOG_NOTQUIET, _("%s: corrupt time-stamp.\n"), con->target);
1550 if (f->perms && f->type == FT_PLAINFILE && dlthis)
1552 if (opt.preserve_perm)
1553 chmod (con->target, f->perms);
1556 DEBUGP (("Unrecognized permissions for %s.\n", con->target));
1558 xfree (con->target);
1559 con->target = old_target;
1561 url_set_file (u, ofile);
1564 /* Break on fatals. */
1565 if (err == QUOTEXC || err == HOSTERR || err == FWRITEERR)
1567 con->cmd &= ~ (DO_CWD | DO_LOGIN);
1571 /* We do not want to call ftp_retrieve_dirs here */
1572 if (opt.recursive &&
1573 !(opt.reclevel != INFINITE_RECURSION && depth >= opt.reclevel))
1574 err = ftp_retrieve_dirs (u, orig, con);
1575 else if (opt.recursive)
1576 DEBUGP ((_("Will not retrieve dirs since depth is %d (max %d).\n"),
1577 depth, opt.reclevel));
1582 /* Retrieve the directories given in a file list. This function works
1583 by simply going through the linked list and calling
1584 ftp_retrieve_glob on each directory entry. The function knows
1585 about excluded directories. */
1587 ftp_retrieve_dirs (struct url *u, struct fileinfo *f, ccon *con)
1589 char *container = NULL;
1590 int container_size = 0;
1592 for (; f; f = f->next)
1595 char *odir, *newdir;
1597 if (opt.quota && total_downloaded_bytes > opt.quota)
1599 if (f->type != FT_DIRECTORY)
1602 /* Allocate u->dir off stack, but reallocate only if a larger
1603 string is needed. It's a pity there's no "realloca" for an
1604 item on the bottom of the stack. */
1605 size = strlen (u->dir) + 1 + strlen (f->name) + 1;
1606 if (size > container_size)
1607 container = (char *)alloca (size);
1612 || (*odir == '/' && *(odir + 1) == '\0'))
1613 /* If ODIR is empty or just "/", simply append f->name to
1614 ODIR. (In the former case, to preserve u->dir being
1615 relative; in the latter case, to avoid double slash.) */
1616 sprintf (newdir, "%s%s", odir, f->name);
1618 /* Else, use a separator. */
1619 sprintf (newdir, "%s/%s", odir, f->name);
1621 DEBUGP (("Composing new CWD relative to the initial directory.\n"));
1622 DEBUGP ((" odir = '%s'\n f->name = '%s'\n newdir = '%s'\n\n",
1623 odir, f->name, newdir));
1624 if (!accdir (newdir, ALLABS))
1626 logprintf (LOG_VERBOSE, _("\
1627 Not descending to `%s' as it is excluded/not-included.\n"),
1628 escnonprint (newdir));
1632 con->st &= ~DONE_CWD;
1634 odir = xstrdup (u->dir); /* because url_set_dir will free
1636 url_set_dir (u, newdir);
1637 ftp_retrieve_glob (u, con, GLOB_GETALL);
1638 url_set_dir (u, odir);
1641 /* Set the time-stamp? */
1644 if (opt.quota && total_downloaded_bytes > opt.quota)
1650 /* Return true if S has a leading '/' or contains '../' */
1652 has_insecure_name_p (const char *s)
1657 if (strstr (s, "../") != 0)
1663 /* A near-top-level function to retrieve the files in a directory.
1664 The function calls ftp_get_listing, to get a linked list of files.
1665 Then it weeds out the file names that do not match the pattern.
1666 ftp_retrieve_list is called with this updated list as an argument.
1668 If the argument ACTION is GLOB_GETONE, just download the file (but
1669 first get the listing, so that the time-stamp is heeded); if it's
1670 GLOB_GLOBALL, use globbing; if it's GLOB_GETALL, download the whole
1673 ftp_retrieve_glob (struct url *u, ccon *con, int action)
1675 struct fileinfo *f, *start;
1678 con->cmd |= LEAVE_PENDING;
1680 res = ftp_get_listing (u, con, &start);
1683 /* First: weed out that do not conform the global rules given in
1684 opt.accepts and opt.rejects. */
1685 if (opt.accepts || opt.rejects)
1690 if (f->type != FT_DIRECTORY && !acceptable (f->name))
1692 logprintf (LOG_VERBOSE, _("Rejecting `%s'.\n"),
1693 escnonprint (f->name));
1694 f = delelement (f, &start);
1700 /* Remove all files with possible harmful names */
1704 if (has_insecure_name_p (f->name))
1706 logprintf (LOG_VERBOSE, _("Rejecting `%s'.\n"),
1707 escnonprint (f->name));
1708 f = delelement (f, &start);
1713 /* Now weed out the files that do not match our globbing pattern.
1714 If we are dealing with a globbing pattern, that is. */
1715 if (*u->file && (action == GLOB_GLOBALL || action == GLOB_GETONE))
1722 matchres = fnmatch (u->file, f->name, 0);
1725 logprintf (LOG_NOTQUIET, "%s: %s\n", con->target,
1729 if (matchres == FNM_NOMATCH)
1730 f = delelement (f, &start); /* delete the element from the list */
1732 f = f->next; /* leave the element in the list */
1736 freefileinfo (start);
1737 return RETRBADPATTERN;
1742 /* Just get everything. */
1743 ftp_retrieve_list (u, start, con);
1747 if (action == GLOB_GLOBALL)
1750 /* #### This message SUCKS. We should see what was the
1751 reason that nothing was retrieved. */
1752 logprintf (LOG_VERBOSE, _("No matches on pattern `%s'.\n"),
1753 escnonprint (u->file));
1755 else /* GLOB_GETONE or GLOB_GETALL */
1757 /* Let's try retrieving it anyway. */
1758 con->st |= ON_YOUR_OWN;
1759 res = ftp_loop_internal (u, NULL, con);
1763 freefileinfo (start);
1764 if (opt.quota && total_downloaded_bytes > opt.quota)
1767 /* #### Should we return `res' here? */
1771 /* The wrapper that calls an appropriate routine according to contents
1772 of URL. Inherently, its capabilities are limited on what can be
1773 encoded into a URL. */
1775 ftp_loop (struct url *u, int *dt, struct url *proxy)
1777 ccon con; /* FTP connection */
1785 con.st = ON_YOUR_OWN;
1790 /* If the file name is empty, the user probably wants a directory
1791 index. We'll provide one, properly HTML-ized. Unless
1792 opt.htmlify is 0, of course. :-) */
1793 if (!*u->file && !opt.recursive)
1796 res = ftp_get_listing (u, &con, &f);
1800 if (opt.htmlify && !opt.spider)
1802 char *filename = (opt.output_document
1803 ? xstrdup (opt.output_document)
1804 : (con.target ? xstrdup (con.target)
1805 : url_file_name (u)));
1806 res = ftp_index (filename, u, f);
1807 if (res == FTPOK && opt.verbose)
1809 if (!opt.output_document)
1813 if (stat (filename, &st) == 0)
1817 logprintf (LOG_NOTQUIET,
1818 _("Wrote HTML-ized index to `%s' [%s].\n"),
1819 filename, number_to_static_string (sz));
1822 logprintf (LOG_NOTQUIET,
1823 _("Wrote HTML-ized index to `%s'.\n"),
1833 bool ispattern = false;
1836 /* Treat the URL as a pattern if the file name part of the
1837 URL path contains wildcards. (Don't check for u->file
1838 because it is unescaped and therefore doesn't leave users
1839 the option to escape literal '*' as %2A.) */
1840 char *file_part = strrchr (u->path, '/');
1842 file_part = u->path;
1843 ispattern = has_wildcards_p (file_part);
1845 if (ispattern || opt.recursive || opt.timestamping)
1847 /* ftp_retrieve_glob is a catch-all function that gets called
1848 if we need globbing, time-stamping or recursion. Its
1849 third argument is just what we really need. */
1850 res = ftp_retrieve_glob (u, &con,
1851 ispattern ? GLOB_GLOBALL : GLOB_GETONE);
1854 res = ftp_loop_internal (u, NULL, &con);
1860 /* If a connection was left, quench it. */
1861 if (con.csock != -1)
1862 fd_close (con.csock);
1863 xfree_null (con.id);
1865 xfree_null (con.target);
1870 /* Delete an element from the fileinfo linked list. Returns the
1871 address of the next element, or NULL if the list is exhausted. It
1872 can modify the start of the list. */
1873 static struct fileinfo *
1874 delelement (struct fileinfo *f, struct fileinfo **start)
1876 struct fileinfo *prev = f->prev;
1877 struct fileinfo *next = f->next;
1880 xfree_null (f->linkto);
1892 /* Free the fileinfo linked list of files. */
1894 freefileinfo (struct fileinfo *f)
1898 struct fileinfo *next = f->next;