1 /* File Transfer Protocol support.
2 Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001
3 Free Software Foundation, Inc.
5 This file is part of GNU Wget.
7 GNU Wget is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 GNU Wget is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Wget; if not, write to the Free Software
19 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 In addition, as a special exception, the Free Software Foundation
22 gives permission to link the code of its release of Wget with the
23 OpenSSL project's "OpenSSL" library (or with modified versions of it
24 that use the same license as the "OpenSSL" library), and distribute
25 the linked executables. You must obey the GNU General Public License
26 in all respects for all of the code used other than "OpenSSL". If you
27 modify this file, you may extend this exception to your version of the
28 file, but you are not obligated to do so. If you do not wish to do
29 so, delete this exception statement from your version. */
43 #include <sys/types.h>
55 #include "convert.h" /* for downloaded_file */
56 #include "recur.h" /* for INFINITE_RECURSION */
62 extern LARGE_INT total_downloaded_bytes;
64 /* File where the "ls -al" listing will be saved. */
65 #define LIST_FILENAME ".listing"
67 extern char ftp_last_respline[];
69 extern FILE *output_stream;
70 extern int output_stream_regular;
74 int st; /* connection status */
75 int cmd; /* command code */
76 int csock; /* control connection socket */
77 double dltime; /* time of the download in msecs */
78 enum stype rs; /* remote system reported by ftp server */
79 char *id; /* initial directory */
80 char *target; /* target file name */
81 struct url *proxy; /* FTWK-style proxy */
85 /* Look for regexp "( *[0-9]+ *byte" (literal parenthesis) anywhere in
86 the string S, and return the number converted to wgint, if found, 0
89 ftp_expected_bytes (const char *s)
95 while (*s && *s != '(')
99 ++s; /* skip the '(' */
100 res = str_to_wgint (s, (char **) &s, 10);
103 while (*s && ISSPACE (*s))
107 if (TOLOWER (*s) != 'b')
109 if (strncasecmp (s, "byte", 4))
119 * This function sets up a passive data connection with the FTP server.
120 * It is merely a wrapper around ftp_epsv, ftp_lpsv and ftp_pasv.
123 ftp_do_pasv (int csock, ip_address *addr, int *port)
127 /* We need to determine the address family and need to call
128 getpeername, so while we're at it, store the address to ADDR.
129 ftp_pasv and ftp_lpsv can simply override it. */
130 if (!socket_ip_address (csock, addr, ENDPOINT_PEER))
133 /* If our control connection is over IPv6, then we first try EPSV and then
134 * LPSV if the former is not supported. If the control connection is over
135 * IPv4, we simply issue the good old PASV request. */
139 if (!opt.server_response)
140 logputs (LOG_VERBOSE, "==> PASV ... ");
141 err = ftp_pasv (csock, addr, port);
144 if (!opt.server_response)
145 logputs (LOG_VERBOSE, "==> EPSV ... ");
146 err = ftp_epsv (csock, addr, port);
148 /* If EPSV is not supported try LPSV */
149 if (err == FTPNOPASV)
151 if (!opt.server_response)
152 logputs (LOG_VERBOSE, "==> LPSV ... ");
153 err = ftp_lpsv (csock, addr, port);
164 * This function sets up an active data connection with the FTP server.
165 * It is merely a wrapper around ftp_eprt, ftp_lprt and ftp_port.
168 ftp_do_port (int csock, int *local_sock)
173 if (!socket_ip_address (csock, &cip, ENDPOINT_PEER))
176 /* If our control connection is over IPv6, then we first try EPRT and then
177 * LPRT if the former is not supported. If the control connection is over
178 * IPv4, we simply issue the good old PORT request. */
182 if (!opt.server_response)
183 logputs (LOG_VERBOSE, "==> PORT ... ");
184 err = ftp_port (csock, local_sock);
187 if (!opt.server_response)
188 logputs (LOG_VERBOSE, "==> EPRT ... ");
189 err = ftp_eprt (csock, local_sock);
191 /* If EPRT is not supported try LPRT */
192 if (err == FTPPORTERR)
194 if (!opt.server_response)
195 logputs (LOG_VERBOSE, "==> LPRT ... ");
196 err = ftp_lprt (csock, local_sock);
207 ftp_do_pasv (int csock, ip_address *addr, int *port)
209 if (!opt.server_response)
210 logputs (LOG_VERBOSE, "==> PASV ... ");
211 return ftp_pasv (csock, addr, port);
215 ftp_do_port (int csock, int *local_sock)
217 if (!opt.server_response)
218 logputs (LOG_VERBOSE, "==> PORT ... ");
219 return ftp_port (csock, local_sock);
223 /* Retrieves a file with denoted parameters through opening an FTP
224 connection to the server. It always closes the data connection,
225 and closes the control connection in case of error. */
227 getftp (struct url *u, wgint *len, wgint restval, ccon *con)
229 int csock, dtsock, local_sock, res;
232 char *user, *passwd, *respline;
235 int pasv_mode_open = 0;
236 wgint expected_bytes = 0L;
241 assert (con != NULL);
242 assert (con->target != NULL);
244 /* Debug-check of the sanity of the request by making sure that LIST
245 and RETR are never both requested (since we can handle only one
247 assert (!((cmd & DO_LIST) && (cmd & DO_RETR)));
248 /* Make sure that at least *something* is requested. */
249 assert ((cmd & (DO_LIST | DO_CWD | DO_RETR | DO_LOGIN)) != 0);
253 search_netrc (u->host, (const char **)&user, (const char **)&passwd, 1);
254 user = user ? user : opt.ftp_acc;
255 passwd = passwd ? passwd : opt.ftp_pass;
256 assert (user && passwd);
262 if (!(cmd & DO_LOGIN))
264 else /* cmd & DO_LOGIN */
267 char *host = con->proxy ? con->proxy->host : u->host;
268 int port = con->proxy ? con->proxy->port : u->port;
269 char *logname = user;
273 /* If proxy is in use, log in as username@target-site. */
274 logname = xmalloc (strlen (user) + 1 + strlen (u->host) + 1);
275 sprintf (logname, "%s@%s", user, u->host);
278 /* Login to the server: */
280 /* First: Establish the control connection. */
282 csock = connect_to_host (host, port);
286 return (retryable_socket_connect_error (errno)
287 ? CONERROR : CONIMPOSSIBLE);
289 if (cmd & LEAVE_PENDING)
294 /* Second: Login with proper USER/PASS sequence. */
295 logprintf (LOG_VERBOSE, _("Logging in as %s ... "), user);
296 if (opt.server_response)
297 logputs (LOG_ALWAYS, "\n");
298 err = ftp_login (csock, logname, passwd);
303 /* FTPRERR, FTPSRVERR, WRITEFAILED, FTPLOGREFUSED, FTPLOGINC */
307 logputs (LOG_VERBOSE, "\n");
308 logputs (LOG_NOTQUIET, _("\
309 Error in server response, closing control connection.\n"));
315 logputs (LOG_VERBOSE, "\n");
316 logputs (LOG_NOTQUIET, _("Error in server greeting.\n"));
322 logputs (LOG_VERBOSE, "\n");
323 logputs (LOG_NOTQUIET,
324 _("Write failed, closing control connection.\n"));
330 logputs (LOG_VERBOSE, "\n");
331 logputs (LOG_NOTQUIET, _("The server refuses login.\n"));
334 return FTPLOGREFUSED;
337 logputs (LOG_VERBOSE, "\n");
338 logputs (LOG_NOTQUIET, _("Login incorrect.\n"));
344 if (!opt.server_response)
345 logputs (LOG_VERBOSE, _("Logged in!\n"));
352 /* Third: Get the system type */
353 if (!opt.server_response)
354 logprintf (LOG_VERBOSE, "==> SYST ... ");
355 err = ftp_syst (csock, &con->rs);
360 logputs (LOG_VERBOSE, "\n");
361 logputs (LOG_NOTQUIET, _("\
362 Error in server response, closing control connection.\n"));
368 logputs (LOG_VERBOSE, "\n");
369 logputs (LOG_NOTQUIET,
370 _("Server error, can't determine system type.\n"));
373 /* Everything is OK. */
379 if (!opt.server_response && err != FTPSRVERR)
380 logputs (LOG_VERBOSE, _("done. "));
382 /* Fourth: Find the initial ftp directory */
384 if (!opt.server_response)
385 logprintf (LOG_VERBOSE, "==> PWD ... ");
386 err = ftp_pwd (csock, &con->id);
391 logputs (LOG_VERBOSE, "\n");
392 logputs (LOG_NOTQUIET, _("\
393 Error in server response, closing control connection.\n"));
399 /* PWD unsupported -- assume "/". */
400 xfree_null (con->id);
401 con->id = xstrdup ("/");
404 /* Everything is OK. */
410 /* VMS will report something like "PUB$DEVICE:[INITIAL.FOLDER]".
411 Convert it to "/INITIAL/FOLDER" */
412 if (con->rs == ST_VMS)
414 char *path = strchr (con->id, '[');
415 char *pathend = path ? strchr (path + 1, ']') : NULL;
416 if (!path || !pathend)
417 DEBUGP (("Initial VMS directory not in the form [...]!\n"));
420 char *idir = con->id;
421 DEBUGP (("Preprocessing the initial VMS directory\n"));
422 DEBUGP ((" old = '%s'\n", con->id));
423 /* We do the conversion in-place by copying the stuff
424 between [ and ] to the beginning, and changing dots
425 to slashes at the same time. */
427 for (++path; path < pathend; path++, idir++)
428 *idir = *path == '.' ? '/' : *path;
430 DEBUGP ((" new = '%s'\n\n", con->id));
433 if (!opt.server_response)
434 logputs (LOG_VERBOSE, _("done.\n"));
436 /* Fifth: Set the FTP type. */
437 type_char = ftp_process_type (u->params);
438 if (!opt.server_response)
439 logprintf (LOG_VERBOSE, "==> TYPE %c ... ", type_char);
440 err = ftp_type (csock, type_char);
441 /* FTPRERR, WRITEFAILED, FTPUNKNOWNTYPE */
445 logputs (LOG_VERBOSE, "\n");
446 logputs (LOG_NOTQUIET, _("\
447 Error in server response, closing control connection.\n"));
453 logputs (LOG_VERBOSE, "\n");
454 logputs (LOG_NOTQUIET,
455 _("Write failed, closing control connection.\n"));
461 logputs (LOG_VERBOSE, "\n");
462 logprintf (LOG_NOTQUIET,
463 _("Unknown type `%c', closing control connection.\n"),
469 /* Everything is OK. */
475 if (!opt.server_response)
476 logputs (LOG_VERBOSE, _("done. "));
482 logputs (LOG_VERBOSE, _("==> CWD not needed.\n"));
485 char *target = u->dir;
487 DEBUGP (("changing working directory\n"));
489 /* Change working directory. To change to a non-absolute
490 Unix directory, we need to prepend initial directory
491 (con->id) to it. Absolute directories "just work".
493 A relative directory is one that does not begin with '/'
494 and, on non-Unix OS'es, one that doesn't begin with
497 This is not done for OS400, which doesn't use
498 "/"-delimited directories, nor does it support directory
499 hierarchies. "CWD foo" followed by "CWD bar" leaves us
500 in "bar", not in "foo/bar", as would be customary
504 && !(con->rs != ST_UNIX
505 && ISALPHA (target[0])
507 && con->rs != ST_OS400)
509 int idlen = strlen (con->id);
512 /* Strip trailing slash(es) from con->id. */
513 while (idlen > 0 && con->id[idlen - 1] == '/')
515 p = ntarget = (char *)alloca (idlen + 1 + strlen (u->dir) + 1);
516 memcpy (p, con->id, idlen);
521 DEBUGP (("Prepended initial PWD to relative path:\n"));
522 DEBUGP ((" pwd: '%s'\n old: '%s'\n new: '%s'\n",
523 con->id, target, ntarget));
527 /* If the FTP host runs VMS, we will have to convert the absolute
528 directory path in UNIX notation to absolute directory path in
529 VMS notation as VMS FTP servers do not like UNIX notation of
530 absolute paths. "VMS notation" is [dir.subdir.subsubdir]. */
532 if (con->rs == ST_VMS)
535 char *ntarget = (char *)alloca (strlen (target) + 2);
536 /* We use a converted initial dir, so directories in
537 TARGET will be separated with slashes, something like
538 "/INITIAL/FOLDER/DIR/SUBDIR". Convert that to
539 "[INITIAL.FOLDER.DIR.SUBDIR]". */
540 strcpy (ntarget, target);
541 assert (*ntarget == '/');
543 for (tmpp = ntarget + 1; *tmpp; tmpp++)
548 DEBUGP (("Changed file name to VMS syntax:\n"));
549 DEBUGP ((" Unix: '%s'\n VMS: '%s'\n", target, ntarget));
553 if (!opt.server_response)
554 logprintf (LOG_VERBOSE, "==> CWD %s ... ", target);
555 err = ftp_cwd (csock, target);
556 /* FTPRERR, WRITEFAILED, FTPNSFOD */
560 logputs (LOG_VERBOSE, "\n");
561 logputs (LOG_NOTQUIET, _("\
562 Error in server response, closing control connection.\n"));
568 logputs (LOG_VERBOSE, "\n");
569 logputs (LOG_NOTQUIET,
570 _("Write failed, closing control connection.\n"));
576 logputs (LOG_VERBOSE, "\n");
577 logprintf (LOG_NOTQUIET, _("No such directory `%s'.\n\n"),
590 if (!opt.server_response)
591 logputs (LOG_VERBOSE, _("done.\n"));
594 else /* do not CWD */
595 logputs (LOG_VERBOSE, _("==> CWD not required.\n"));
597 if ((cmd & DO_RETR) && restval && *len == 0)
601 if (!opt.server_response)
602 logprintf (LOG_VERBOSE, "==> SIZE %s ... ", u->file);
605 err = ftp_size (csock, u->file, len);
611 logputs (LOG_VERBOSE, "\n");
612 logputs (LOG_NOTQUIET, _("\
613 Error in server response, closing control connection.\n"));
619 /* Everything is OK. */
625 if (!opt.server_response)
626 logputs (LOG_VERBOSE, _("done.\n"));
629 /* If anything is to be retrieved, PORT (or PASV) must be sent. */
630 if (cmd & (DO_LIST | DO_RETR))
632 if (opt.ftp_pasv > 0)
634 ip_address passive_addr;
636 err = ftp_do_pasv (csock, &passive_addr, &passive_port);
637 /* FTPRERR, WRITEFAILED, FTPNOPASV, FTPINVPASV */
641 logputs (LOG_VERBOSE, "\n");
642 logputs (LOG_NOTQUIET, _("\
643 Error in server response, closing control connection.\n"));
649 logputs (LOG_VERBOSE, "\n");
650 logputs (LOG_NOTQUIET,
651 _("Write failed, closing control connection.\n"));
657 logputs (LOG_VERBOSE, "\n");
658 logputs (LOG_NOTQUIET, _("Cannot initiate PASV transfer.\n"));
661 logputs (LOG_VERBOSE, "\n");
662 logputs (LOG_NOTQUIET, _("Cannot parse PASV response.\n"));
673 DEBUGP (("trying to connect to %s port %d\n",
674 pretty_print_address (&passive_addr),
676 dtsock = connect_to_ip (&passive_addr, passive_port, NULL);
679 int save_errno = errno;
682 logprintf (LOG_VERBOSE, _("couldn't connect to %s port %d: %s\n"),
683 pretty_print_address (&passive_addr), passive_port,
684 strerror (save_errno));
685 return (retryable_socket_connect_error (save_errno)
686 ? CONERROR : CONIMPOSSIBLE);
689 pasv_mode_open = 1; /* Flag to avoid accept port */
690 if (!opt.server_response)
691 logputs (LOG_VERBOSE, _("done. "));
695 if (!pasv_mode_open) /* Try to use a port command if PASV failed */
697 err = ftp_do_port (csock, &local_sock);
698 /* FTPRERR, WRITEFAILED, bindport (FTPSYSERR), HOSTERR,
703 logputs (LOG_VERBOSE, "\n");
704 logputs (LOG_NOTQUIET, _("\
705 Error in server response, closing control connection.\n"));
709 fd_close (local_sock);
713 logputs (LOG_VERBOSE, "\n");
714 logputs (LOG_NOTQUIET,
715 _("Write failed, closing control connection.\n"));
719 fd_close (local_sock);
723 logputs (LOG_VERBOSE, "\n");
724 logprintf (LOG_NOTQUIET, "socket: %s\n", strerror (errno));
728 fd_close (local_sock);
732 logputs (LOG_VERBOSE, "\n");
733 logprintf (LOG_NOTQUIET, _("Bind error (%s).\n"),
739 logputs (LOG_VERBOSE, "\n");
740 logputs (LOG_NOTQUIET, _("Invalid PORT.\n"));
744 fd_close (local_sock);
754 if (!opt.server_response)
755 logputs (LOG_VERBOSE, _("done. "));
757 } /* cmd & (DO_LIST | DO_RETR) */
759 /* Restart if needed. */
760 if (restval && (cmd & DO_RETR))
762 if (!opt.server_response)
763 logprintf (LOG_VERBOSE, "==> REST %s ... ", number_to_static_string (restval));
764 err = ftp_rest (csock, restval);
766 /* FTPRERR, WRITEFAILED, FTPRESTFAIL */
770 logputs (LOG_VERBOSE, "\n");
771 logputs (LOG_NOTQUIET, _("\
772 Error in server response, closing control connection.\n"));
776 fd_close (local_sock);
780 logputs (LOG_VERBOSE, "\n");
781 logputs (LOG_NOTQUIET,
782 _("Write failed, closing control connection.\n"));
786 fd_close (local_sock);
790 logputs (LOG_VERBOSE, _("\nREST failed, starting from scratch.\n"));
800 if (err != FTPRESTFAIL && !opt.server_response)
801 logputs (LOG_VERBOSE, _("done. "));
802 } /* restval && cmd & DO_RETR */
806 /* If we're in spider mode, don't really retrieve anything. The
807 fact that we got to this point should be proof enough that
808 the file exists, vaguely akin to HTTP's concept of a "HEAD"
815 fd_close (local_sock);
821 if (!opt.server_response)
824 logputs (LOG_VERBOSE, "\n");
825 logprintf (LOG_VERBOSE, "==> RETR %s ... ", u->file);
829 err = ftp_retr (csock, u->file);
830 /* FTPRERR, WRITEFAILED, FTPNSFOD */
834 logputs (LOG_VERBOSE, "\n");
835 logputs (LOG_NOTQUIET, _("\
836 Error in server response, closing control connection.\n"));
840 fd_close (local_sock);
844 logputs (LOG_VERBOSE, "\n");
845 logputs (LOG_NOTQUIET,
846 _("Write failed, closing control connection.\n"));
850 fd_close (local_sock);
854 logputs (LOG_VERBOSE, "\n");
855 logprintf (LOG_NOTQUIET, _("No such file `%s'.\n\n"), u->file);
857 fd_close (local_sock);
868 if (!opt.server_response)
869 logputs (LOG_VERBOSE, _("done.\n"));
870 expected_bytes = ftp_expected_bytes (ftp_last_respline);
875 if (!opt.server_response)
876 logputs (LOG_VERBOSE, "==> LIST ... ");
877 /* As Maciej W. Rozycki (macro@ds2.pg.gda.pl) says, `LIST'
878 without arguments is better than `LIST .'; confirmed by
880 err = ftp_list (csock, NULL);
881 /* FTPRERR, WRITEFAILED */
885 logputs (LOG_VERBOSE, "\n");
886 logputs (LOG_NOTQUIET, _("\
887 Error in server response, closing control connection.\n"));
891 fd_close (local_sock);
895 logputs (LOG_VERBOSE, "\n");
896 logputs (LOG_NOTQUIET,
897 _("Write failed, closing control connection.\n"));
901 fd_close (local_sock);
905 logputs (LOG_VERBOSE, "\n");
906 logprintf (LOG_NOTQUIET, _("No such file or directory `%s'.\n\n"),
909 fd_close (local_sock);
919 if (!opt.server_response)
920 logputs (LOG_VERBOSE, _("done.\n"));
921 expected_bytes = ftp_expected_bytes (ftp_last_respline);
922 } /* cmd & DO_LIST */
924 if (!(cmd & (DO_LIST | DO_RETR)) || (opt.spider && !(cmd & DO_LIST)))
927 /* Some FTP servers return the total length of file after REST
928 command, others just return the remaining size. */
929 if (*len && restval && expected_bytes
930 && (expected_bytes == *len - restval))
932 DEBUGP (("Lying FTP server found, adjusting.\n"));
933 expected_bytes = *len;
936 /* If no transmission was required, then everything is OK. */
937 if (!pasv_mode_open) /* we are not using pasive mode so we need
940 /* Wait for the server to connect to the address we're waiting
942 dtsock = accept_connection (local_sock);
945 logprintf (LOG_NOTQUIET, "accept: %s\n", strerror (errno));
950 /* Open the file -- if output_stream is set, use it instead. */
951 if (!output_stream || con->cmd & DO_LIST)
953 mkalldirs (con->target);
955 rotate_backups (con->target);
956 /* #### Is this correct? */
957 chmod (con->target, 0600);
959 fp = fopen (con->target, restval ? "ab" : "wb");
962 logprintf (LOG_NOTQUIET, "%s: %s\n", con->target, strerror (errno));
966 fd_close (local_sock);
975 logprintf (LOG_VERBOSE, _("Length: %s"), legible (*len));
977 logprintf (LOG_VERBOSE, _(" [%s to go]"), legible (*len - restval));
978 logputs (LOG_VERBOSE, "\n");
979 expected_bytes = *len; /* for get_contents/show_progress */
981 else if (expected_bytes)
983 logprintf (LOG_VERBOSE, _("Length: %s"), legible (expected_bytes));
985 logprintf (LOG_VERBOSE, _(" [%s to go]"),
986 legible (expected_bytes - restval));
987 logputs (LOG_VERBOSE, _(" (unauthoritative)\n"));
990 /* Get the contents of the document. */
992 if (restval && rest_failed)
993 flags |= rb_skip_startpos;
996 res = fd_read_body (dtsock, fp,
997 expected_bytes ? expected_bytes - restval : 0,
998 restval, &rd_size, len, &con->dltime, flags);
1000 tms = time_str (NULL);
1001 tmrate = retr_rate (rd_size, con->dltime, 0);
1002 /* Close data connection socket. */
1004 fd_close (local_sock);
1005 /* Close the local file. */
1007 /* Close or flush the file. We have to be careful to check for
1008 error here. Checking the result of fwrite() is not enough --
1009 errors could go unnoticed! */
1011 if (!output_stream || con->cmd & DO_LIST)
1012 flush_res = fclose (fp);
1014 flush_res = fflush (fp);
1015 if (flush_res == EOF)
1019 /* If get_contents couldn't write to fp, bail out. */
1022 logprintf (LOG_NOTQUIET, _("%s: %s, closing control connection.\n"),
1023 con->target, strerror (errno));
1030 logprintf (LOG_NOTQUIET, _("%s (%s) - Data connection: %s; "),
1031 tms, tmrate, strerror (errno));
1032 if (opt.server_response)
1033 logputs (LOG_ALWAYS, "\n");
1036 /* Get the server to tell us if everything is retrieved. */
1037 err = ftp_response (csock, &respline);
1041 /* The control connection is decidedly closed. Print the time
1042 only if it hasn't already been printed. */
1044 logprintf (LOG_NOTQUIET, "%s (%s) - ", tms, tmrate);
1045 logputs (LOG_NOTQUIET, _("Control connection closed.\n"));
1046 /* If there is an error on the control connection, close it, but
1047 return FTPRETRINT, since there is a possibility that the
1048 whole file was retrieved nevertheless (but that is for
1049 ftp_loop_internal to decide). */
1053 } /* err != FTPOK */
1054 /* If retrieval failed for any reason, return FTPRETRINT, but do not
1055 close socket, since the control connection is still alive. If
1056 there is something wrong with the control connection, it will
1057 become apparent later. */
1058 if (*respline != '2')
1062 logprintf (LOG_NOTQUIET, "%s (%s) - ", tms, tmrate);
1063 logputs (LOG_NOTQUIET, _("Data transfer aborted.\n"));
1070 /* What now? The data connection was erroneous, whereas the
1071 response says everything is OK. We shall play it safe. */
1075 if (!(cmd & LEAVE_PENDING))
1077 /* Closing the socket is faster than sending 'QUIT' and the
1078 effect is the same. */
1082 /* If it was a listing, and opt.server_response is true,
1084 if (opt.server_response && (con->cmd & DO_LIST))
1086 mkalldirs (con->target);
1087 fp = fopen (con->target, "r");
1089 logprintf (LOG_ALWAYS, "%s: %s\n", con->target, strerror (errno));
1093 /* The lines are being read with read_whole_line because of
1094 no-buffering on opt.lfile. */
1095 while ((line = read_whole_line (fp)))
1097 logprintf (LOG_ALWAYS, "%s\n", line);
1102 } /* con->cmd & DO_LIST && server_response */
1104 return RETRFINISHED;
1107 /* A one-file FTP loop. This is the part where FTP retrieval is
1108 retried, and retried, and retried, and...
1110 This loop either gets commands from con, or (if ON_YOUR_OWN is
1111 set), makes them up to retrieve the file given by the URL. */
1113 ftp_loop_internal (struct url *u, struct fileinfo *f, ccon *con)
1116 wgint restval, len = 0;
1118 char *tmrate = NULL;
1123 con->target = url_file_name (u);
1125 if (opt.noclobber && file_exists_p (con->target))
1127 logprintf (LOG_VERBOSE,
1128 _("File `%s' already there, not retrieving.\n"), con->target);
1129 /* If the file is there, we suppose it's retrieved OK. */
1133 /* Remove it if it's a link. */
1134 remove_link (con->target);
1135 if (!opt.output_document)
1138 locf = opt.output_document;
1142 if (con->st & ON_YOUR_OWN)
1143 con->st = ON_YOUR_OWN;
1145 orig_lp = con->cmd & LEAVE_PENDING ? 1 : 0;
1150 /* Increment the pass counter. */
1152 sleep_between_retrievals (count);
1153 if (con->st & ON_YOUR_OWN)
1156 con->cmd |= (DO_RETR | LEAVE_PENDING);
1157 if (con->csock != -1)
1158 con->cmd &= ~ (DO_LOGIN | DO_CWD);
1160 con->cmd |= (DO_LOGIN | DO_CWD);
1162 else /* not on your own */
1164 if (con->csock != -1)
1165 con->cmd &= ~DO_LOGIN;
1167 con->cmd |= DO_LOGIN;
1168 if (con->st & DONE_CWD)
1169 con->cmd &= ~DO_CWD;
1174 /* Decide whether or not to restart. */
1177 restval = len; /* start where the previous run left off */
1178 else if (opt.always_rest
1179 && stat (locf, &st) == 0
1180 && S_ISREG (st.st_mode))
1181 restval = st.st_size;
1183 /* Get the current time string. */
1184 tms = time_str (NULL);
1185 /* Print fetch message, if opt.verbose. */
1188 char *hurl = url_string (u, 1);
1192 sprintf (tmp, _("(try:%2d)"), count);
1193 logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n",
1194 tms, hurl, tmp, locf);
1196 ws_changetitle (hurl);
1200 /* Send getftp the proper length, if fileinfo was provided. */
1205 err = getftp (u, &len, restval, con);
1207 if (con->csock != -1)
1208 con->st &= ~DONE_CWD;
1210 con->st |= DONE_CWD;
1214 case HOSTERR: case CONIMPOSSIBLE: case FWRITEERR: case FOPENERR:
1215 case FTPNSFOD: case FTPLOGINC: case FTPNOPASV: case CONTNOTSUPPORTED:
1216 /* Fatal errors, give up. */
1219 case CONSOCKERR: case CONERROR: case FTPSRVERR: case FTPRERR:
1220 case WRITEFAILED: case FTPUNKNOWNTYPE: case FTPSYSERR:
1221 case FTPPORTERR: case FTPLOGREFUSED: case FTPINVPASV:
1222 printwhat (count, opt.ntry);
1223 /* non-fatal errors */
1227 /* If the control connection was closed, the retrieval
1228 will be considered OK if f->size == len. */
1229 if (!f || len != f->size)
1231 printwhat (count, opt.ntry);
1242 tms = time_str (NULL);
1244 tmrate = retr_rate (len - restval, con->dltime, 0);
1246 /* If we get out of the switch above without continue'ing, we've
1247 successfully downloaded a file. Remember this fact. */
1248 downloaded_file (FILE_DOWNLOADED_NORMALLY, locf);
1250 if (con->st & ON_YOUR_OWN)
1252 fd_close (con->csock);
1256 logprintf (LOG_VERBOSE, _("%s (%s) - `%s' saved [%s]\n\n"),
1257 tms, tmrate, locf, number_to_static_string (len));
1258 if (!opt.verbose && !opt.quiet)
1260 /* Need to hide the password from the URL. The `if' is here
1261 so that we don't do the needless allocation every
1263 char *hurl = url_string (u, 1);
1264 logprintf (LOG_NONVERBOSE, "%s URL: %s [%s] -> \"%s\" [%d]\n",
1265 tms, hurl, number_to_static_string (len), locf, count);
1269 if ((con->cmd & DO_LIST))
1270 /* This is a directory listing file. */
1272 if (!opt.remove_listing)
1273 /* --dont-remove-listing was specified, so do count this towards the
1274 number of bytes and files downloaded. */
1276 total_downloaded_bytes += len;
1280 /* Deletion of listing files is not controlled by --delete-after, but
1281 by the more specific option --dont-remove-listing, and the code
1282 to do this deletion is in another function. */
1284 else if (!opt.spider)
1285 /* This is not a directory listing file. */
1287 /* Unlike directory listing files, don't pretend normal files weren't
1288 downloaded if they're going to be deleted. People seeding proxies,
1289 for instance, may want to know how many bytes and files they've
1290 downloaded through it. */
1291 total_downloaded_bytes += len;
1294 if (opt.delete_after)
1296 DEBUGP (("Removing file due to --delete-after in"
1297 " ftp_loop_internal():\n"));
1298 logprintf (LOG_VERBOSE, _("Removing %s.\n"), locf);
1300 logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
1304 /* Restore the original leave-pendingness. */
1306 con->cmd |= LEAVE_PENDING;
1308 con->cmd &= ~LEAVE_PENDING;
1310 } while (!opt.ntry || (count < opt.ntry));
1312 if (con->csock != -1 && (con->st & ON_YOUR_OWN))
1314 fd_close (con->csock);
1320 /* Return the directory listing in a reusable format. The directory
1321 is specifed in u->dir. */
1323 ftp_get_listing (struct url *u, ccon *con, struct fileinfo **f)
1326 char *uf; /* url file name */
1327 char *lf; /* list file name */
1328 char *old_target = con->target;
1330 con->st &= ~ON_YOUR_OWN;
1331 con->cmd |= (DO_LIST | LEAVE_PENDING);
1332 con->cmd &= ~DO_RETR;
1334 /* Find the listing file name. We do it by taking the file name of
1335 the URL and replacing the last component with the listing file
1337 uf = url_file_name (u);
1338 lf = file_merge (uf, LIST_FILENAME);
1340 DEBUGP ((_("Using `%s' as listing tmp file.\n"), lf));
1343 err = ftp_loop_internal (u, NULL, con);
1344 con->target = old_target;
1347 *f = ftp_parse_ls (lf, con->rs);
1350 if (opt.remove_listing)
1353 logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno));
1355 logprintf (LOG_VERBOSE, _("Removed `%s'.\n"), lf);
1358 con->cmd &= ~DO_LIST;
1362 static uerr_t ftp_retrieve_dirs PARAMS ((struct url *, struct fileinfo *,
1364 static uerr_t ftp_retrieve_glob PARAMS ((struct url *, ccon *, int));
1365 static struct fileinfo *delelement PARAMS ((struct fileinfo *,
1366 struct fileinfo **));
1367 static void freefileinfo PARAMS ((struct fileinfo *f));
1369 /* Retrieve a list of files given in struct fileinfo linked list. If
1370 a file is a symbolic link, do not retrieve it, but rather try to
1371 set up a similar link on the local disk, if the symlinks are
1374 If opt.recursive is set, after all files have been retrieved,
1375 ftp_retrieve_dirs will be called to retrieve the directories. */
1377 ftp_retrieve_list (struct url *u, struct fileinfo *f, ccon *con)
1379 static int depth = 0;
1381 struct fileinfo *orig;
1386 /* Increase the depth. */
1388 if (opt.reclevel != INFINITE_RECURSION && depth > opt.reclevel)
1390 DEBUGP ((_("Recursion depth %d exceeded max. depth %d.\n"),
1391 depth, opt.reclevel));
1399 con->st &= ~ON_YOUR_OWN;
1400 if (!(con->st & DONE_CWD))
1403 con->cmd &= ~DO_CWD;
1404 con->cmd |= (DO_RETR | LEAVE_PENDING);
1407 con->cmd |= DO_LOGIN;
1409 con->cmd &= ~DO_LOGIN;
1411 err = RETROK; /* in case it's not used */
1415 char *old_target, *ofile;
1417 if (opt.quota && total_downloaded_bytes > opt.quota)
1422 old_target = con->target;
1424 ofile = xstrdup (u->file);
1425 url_set_file (u, f->name);
1427 con->target = url_file_name (u);
1431 if (opt.timestamping && f->type == FT_PLAINFILE)
1434 /* If conversion of HTML files retrieved via FTP is ever implemented,
1435 we'll need to stat() <file>.orig here when -K has been specified.
1436 I'm not implementing it now since files on an FTP server are much
1437 more likely than files on an HTTP server to legitimately have a
1439 if (!stat (con->target, &st))
1443 /* Else, get it from the file. */
1444 local_size = st.st_size;
1447 /* Modification time granularity is 2 seconds for Windows, so
1448 increase local time by 1 second for later comparison. */
1451 /* Compare file sizes only for servers that tell us correct
1452 values. Assumme sizes being equal for servers that lie
1454 cor_val = (con->rs == ST_UNIX || con->rs == ST_WINNT);
1455 eq_size = cor_val ? (local_size == f->size) : 1 ;
1456 if (f->tstamp <= tml && eq_size)
1458 /* Remote file is older, file sizes can be compared and
1460 logprintf (LOG_VERBOSE, _("\
1461 Remote file no newer than local file `%s' -- not retrieving.\n"), con->target);
1466 /* Remote file is newer or sizes cannot be matched */
1467 logprintf (LOG_VERBOSE, _("\
1468 Remote file is newer than local file `%s' -- retrieving.\n\n"),
1473 /* Sizes do not match */
1474 logprintf (LOG_VERBOSE, _("\
1475 The sizes do not match (local %s) -- retrieving.\n\n"),
1476 number_to_static_string (local_size));
1479 } /* opt.timestamping && f->type == FT_PLAINFILE */
1483 /* If opt.retr_symlinks is defined, we treat symlinks as
1484 if they were normal files. There is currently no way
1485 to distinguish whether they might be directories, and
1487 if (!opt.retr_symlinks)
1491 logputs (LOG_NOTQUIET,
1492 _("Invalid name of the symlink, skipping.\n"));
1496 /* Check whether we already have the correct
1498 int rc = lstat (con->target, &st);
1501 size_t len = strlen (f->linkto) + 1;
1502 if (S_ISLNK (st.st_mode))
1504 char *link_target = (char *)alloca (len);
1505 size_t n = readlink (con->target, link_target, len);
1507 && (memcmp (link_target, f->linkto, n) == 0))
1509 logprintf (LOG_VERBOSE, _("\
1510 Already have correct symlink %s -> %s\n\n"),
1511 con->target, f->linkto);
1517 logprintf (LOG_VERBOSE, _("Creating symlink %s -> %s\n"),
1518 con->target, f->linkto);
1519 /* Unlink before creating symlink! */
1520 unlink (con->target);
1521 if (symlink (f->linkto, con->target) == -1)
1522 logprintf (LOG_NOTQUIET, "symlink: %s\n",
1524 logputs (LOG_VERBOSE, "\n");
1525 } /* have f->linkto */
1526 #else /* not HAVE_SYMLINK */
1527 logprintf (LOG_NOTQUIET,
1528 _("Symlinks not supported, skipping symlink `%s'.\n"),
1530 #endif /* not HAVE_SYMLINK */
1532 else /* opt.retr_symlinks */
1535 err = ftp_loop_internal (u, f, con);
1536 } /* opt.retr_symlinks */
1540 logprintf (LOG_NOTQUIET, _("Skipping directory `%s'.\n"),
1544 /* Call the retrieve loop. */
1546 err = ftp_loop_internal (u, f, con);
1549 logprintf (LOG_NOTQUIET, _("%s: unknown/unsupported file type.\n"),
1554 /* Set the time-stamp information to the local file. Symlinks
1555 are not to be stamped because it sets the stamp on the
1557 if (!(f->type == FT_SYMLINK && !opt.retr_symlinks)
1560 && file_exists_p (con->target))
1562 /* #### This code repeats in http.c and ftp.c. Move it to a
1564 const char *fl = NULL;
1565 if (opt.output_document)
1567 if (output_stream_regular)
1568 fl = opt.output_document;
1573 touch (fl, f->tstamp);
1575 else if (f->tstamp == -1)
1576 logprintf (LOG_NOTQUIET, _("%s: corrupt time-stamp.\n"), con->target);
1578 if (f->perms && f->type == FT_PLAINFILE && dlthis)
1580 if (opt.preserve_perm)
1581 chmod (con->target, f->perms);
1584 DEBUGP (("Unrecognized permissions for %s.\n", con->target));
1586 xfree (con->target);
1587 con->target = old_target;
1589 url_set_file (u, ofile);
1592 /* Break on fatals. */
1593 if (err == QUOTEXC || err == HOSTERR || err == FWRITEERR)
1595 con->cmd &= ~ (DO_CWD | DO_LOGIN);
1599 /* We do not want to call ftp_retrieve_dirs here */
1600 if (opt.recursive &&
1601 !(opt.reclevel != INFINITE_RECURSION && depth >= opt.reclevel))
1602 err = ftp_retrieve_dirs (u, orig, con);
1603 else if (opt.recursive)
1604 DEBUGP ((_("Will not retrieve dirs since depth is %d (max %d).\n"),
1605 depth, opt.reclevel));
1610 /* Retrieve the directories given in a file list. This function works
1611 by simply going through the linked list and calling
1612 ftp_retrieve_glob on each directory entry. The function knows
1613 about excluded directories. */
1615 ftp_retrieve_dirs (struct url *u, struct fileinfo *f, ccon *con)
1617 char *container = NULL;
1618 int container_size = 0;
1620 for (; f; f = f->next)
1623 char *odir, *newdir;
1625 if (opt.quota && total_downloaded_bytes > opt.quota)
1627 if (f->type != FT_DIRECTORY)
1630 /* Allocate u->dir off stack, but reallocate only if a larger
1631 string is needed. It's a pity there's no "realloca" for an
1632 item on the bottom of the stack. */
1633 size = strlen (u->dir) + 1 + strlen (f->name) + 1;
1634 if (size > container_size)
1635 container = (char *)alloca (size);
1640 || (*odir == '/' && *(odir + 1) == '\0'))
1641 /* If ODIR is empty or just "/", simply append f->name to
1642 ODIR. (In the former case, to preserve u->dir being
1643 relative; in the latter case, to avoid double slash.) */
1644 sprintf (newdir, "%s%s", odir, f->name);
1646 /* Else, use a separator. */
1647 sprintf (newdir, "%s/%s", odir, f->name);
1649 DEBUGP (("Composing new CWD relative to the initial directory.\n"));
1650 DEBUGP ((" odir = '%s'\n f->name = '%s'\n newdir = '%s'\n\n",
1651 odir, f->name, newdir));
1652 if (!accdir (newdir, ALLABS))
1654 logprintf (LOG_VERBOSE, _("\
1655 Not descending to `%s' as it is excluded/not-included.\n"), newdir);
1659 con->st &= ~DONE_CWD;
1661 odir = xstrdup (u->dir); /* because url_set_dir will free
1663 url_set_dir (u, newdir);
1664 ftp_retrieve_glob (u, con, GETALL);
1665 url_set_dir (u, odir);
1668 /* Set the time-stamp? */
1671 if (opt.quota && total_downloaded_bytes > opt.quota)
1677 /* Return non-zero if S has a leading '/' or contains '../' */
1679 has_insecure_name_p (const char *s)
1684 if (strstr (s, "../") != 0)
1690 /* A near-top-level function to retrieve the files in a directory.
1691 The function calls ftp_get_listing, to get a linked list of files.
1692 Then it weeds out the file names that do not match the pattern.
1693 ftp_retrieve_list is called with this updated list as an argument.
1695 If the argument ACTION is GETONE, just download the file (but first
1696 get the listing, so that the time-stamp is heeded); if it's GLOBALL,
1697 use globbing; if it's GETALL, download the whole directory. */
1699 ftp_retrieve_glob (struct url *u, ccon *con, int action)
1701 struct fileinfo *f, *start;
1704 con->cmd |= LEAVE_PENDING;
1706 res = ftp_get_listing (u, con, &start);
1709 /* First: weed out that do not conform the global rules given in
1710 opt.accepts and opt.rejects. */
1711 if (opt.accepts || opt.rejects)
1716 if (f->type != FT_DIRECTORY && !acceptable (f->name))
1718 logprintf (LOG_VERBOSE, _("Rejecting `%s'.\n"), f->name);
1719 f = delelement (f, &start);
1725 /* Remove all files with possible harmful names */
1729 if (has_insecure_name_p (f->name))
1731 logprintf (LOG_VERBOSE, _("Rejecting `%s'.\n"), f->name);
1732 f = delelement (f, &start);
1737 /* Now weed out the files that do not match our globbing pattern.
1738 If we are dealing with a globbing pattern, that is. */
1739 if (*u->file && (action == GLOBALL || action == GETONE))
1746 matchres = fnmatch (u->file, f->name, 0);
1749 logprintf (LOG_NOTQUIET, "%s: %s\n", con->target,
1753 if (matchres == FNM_NOMATCH)
1754 f = delelement (f, &start); /* delete the element from the list */
1756 f = f->next; /* leave the element in the list */
1760 freefileinfo (start);
1761 return RETRBADPATTERN;
1767 /* Just get everything. */
1768 ftp_retrieve_list (u, start, con);
1772 if (action == GLOBALL)
1775 /* #### This message SUCKS. We should see what was the
1776 reason that nothing was retrieved. */
1777 logprintf (LOG_VERBOSE, _("No matches on pattern `%s'.\n"), u->file);
1779 else /* GETONE or GETALL */
1781 /* Let's try retrieving it anyway. */
1782 con->st |= ON_YOUR_OWN;
1783 res = ftp_loop_internal (u, NULL, con);
1787 freefileinfo (start);
1788 if (opt.quota && total_downloaded_bytes > opt.quota)
1791 /* #### Should we return `res' here? */
1795 /* The wrapper that calls an appropriate routine according to contents
1796 of URL. Inherently, its capabilities are limited on what can be
1797 encoded into a URL. */
1799 ftp_loop (struct url *u, int *dt, struct url *proxy)
1801 ccon con; /* FTP connection */
1806 memset (&con, 0, sizeof (con));
1809 con.st = ON_YOUR_OWN;
1813 res = RETROK; /* in case it's not used */
1815 /* If the file name is empty, the user probably wants a directory
1816 index. We'll provide one, properly HTML-ized. Unless
1817 opt.htmlify is 0, of course. :-) */
1818 if (!*u->file && !opt.recursive)
1821 res = ftp_get_listing (u, &con, &f);
1825 if (opt.htmlify && !opt.spider)
1827 char *filename = (opt.output_document
1828 ? xstrdup (opt.output_document)
1829 : (con.target ? xstrdup (con.target)
1830 : url_file_name (u)));
1831 res = ftp_index (filename, u, f);
1832 if (res == FTPOK && opt.verbose)
1834 if (!opt.output_document)
1838 if (stat (filename, &st) == 0)
1842 logprintf (LOG_NOTQUIET,
1843 _("Wrote HTML-ized index to `%s' [%s].\n"),
1844 filename, number_to_static_string (sz));
1847 logprintf (LOG_NOTQUIET,
1848 _("Wrote HTML-ized index to `%s'.\n"),
1858 int wild = has_wildcards_p (u->file);
1859 if ((opt.ftp_glob && wild) || opt.recursive || opt.timestamping)
1861 /* ftp_retrieve_glob is a catch-all function that gets called
1862 if we need globbing, time-stamping or recursion. Its
1863 third argument is just what we really need. */
1864 res = ftp_retrieve_glob (u, &con,
1865 (opt.ftp_glob && wild) ? GLOBALL : GETONE);
1868 res = ftp_loop_internal (u, NULL, &con);
1874 /* If a connection was left, quench it. */
1875 if (con.csock != -1)
1876 fd_close (con.csock);
1877 xfree_null (con.id);
1879 xfree_null (con.target);
1884 /* Delete an element from the fileinfo linked list. Returns the
1885 address of the next element, or NULL if the list is exhausted. It
1886 can modify the start of the list. */
1887 static struct fileinfo *
1888 delelement (struct fileinfo *f, struct fileinfo **start)
1890 struct fileinfo *prev = f->prev;
1891 struct fileinfo *next = f->next;
1894 xfree_null (f->linkto);
1906 /* Free the fileinfo linked list of files. */
1908 freefileinfo (struct fileinfo *f)
1912 struct fileinfo *next = f->next;