/* File Transfer Protocol support. Copyright (C) 1995, 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc. This file is part of GNU Wget. GNU Wget is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. GNU Wget is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Wget; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #ifdef HAVE_STRING_H # include #else # include #endif #ifdef HAVE_UNISTD_H # include #endif #include #include #include #ifndef WINDOWS # include /* for h_errno */ #endif #include "wget.h" #include "utils.h" #include "url.h" #include "rbuf.h" #include "retr.h" #include "ftp.h" #include "connect.h" #include "host.h" #include "fnmatch.h" #include "netrc.h" #ifndef errno extern int errno; #endif #ifndef h_errno # ifndef __CYGWIN__ extern int h_errno; # endif #endif /* File where the "ls -al" listing will be saved. */ #define LIST_FILENAME ".listing" extern char ftp_last_respline[]; /* Look for regexp "( *[0-9]+ *byte" (literal parenthesis) anywhere in the string S, and return the number converted to long, if found, 0 otherwise. */ static long ftp_expected_bytes (const char *s) { long res; while (1) { while (*s && *s != '(') ++s; if (!*s) return 0; for (++s; *s && ISSPACE (*s); s++); if (!*s) return 0; if (!ISDIGIT (*s)) continue; res = 0; do { res = (*s - '0') + 10 * res; ++s; } while (*s && ISDIGIT (*s)); if (!*s) return 0; while (*s && ISSPACE (*s)) ++s; if (!*s) return 0; if (TOLOWER (*s) != 'b') continue; if (strncasecmp (s, "byte", 4)) continue; else break; } return res; } /* Retrieves a file with denoted parameters through opening an FTP connection to the server. It always closes the data connection, and closes the control connection in case of error. */ static uerr_t getftp (struct urlinfo *u, long *len, long restval, ccon *con) { int csock, dtsock, res; uerr_t err; FILE *fp; char *user, *passwd, *respline; char *tms, *tmrate; struct wget_timer *timer; unsigned char pasv_addr[6]; int cmd = con->cmd; int passive_mode_open = 0; long expected_bytes = 0L; assert (con != NULL); assert (u->local != NULL); /* Debug-check of the sanity of the request by making sure that LIST and RETR are never both requested (since we can handle only one at a time. */ assert (!((cmd & DO_LIST) && (cmd & DO_RETR))); /* Make sure that at least *something* is requested. */ assert ((cmd & (DO_LIST | DO_CWD | DO_RETR | DO_LOGIN)) != 0); user = u->user; passwd = u->passwd; search_netrc (u->host, (const char **)&user, (const char **)&passwd, 1); user = user ? user : opt.ftp_acc; passwd = passwd ? passwd : opt.ftp_pass; assert (user && passwd); dtsock = -1; con->dltime = 0; if (!(cmd & DO_LOGIN)) csock = RBUF_FD (&con->rbuf); else /* cmd & DO_LOGIN */ { /* Login to the server: */ /* First: Establish the control connection. */ logprintf (LOG_VERBOSE, _("Connecting to %s:%hu... "), u->host, u->port); err = make_connection (&csock, u->host, u->port); if (cmd & LEAVE_PENDING) rbuf_initialize (&con->rbuf, csock); else rbuf_uninitialize (&con->rbuf); switch (err) { /* Do not close the socket in first several cases, since it wasn't created at all. */ case HOSTERR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "%s: %s\n", u->host, herrmsg (h_errno)); return HOSTERR; break; case CONSOCKERR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "socket: %s\n", strerror (errno)); return CONSOCKERR; break; case CONREFUSED: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("Connection to %s:%hu refused.\n"), u->host, u->port); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return CONREFUSED; case CONERROR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "connect: %s\n", strerror (errno)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return CONERROR; break; default: DO_NOTHING; /* #### Hmm? */ } /* Since this is a new connection, we may safely discard anything left in the buffer. */ rbuf_discard (&con->rbuf); /* Second: Login with proper USER/PASS sequence. */ logputs (LOG_VERBOSE, _("connected!\n")); logprintf (LOG_VERBOSE, _("Logging in as %s ... "), user); if (opt.server_response) logputs (LOG_ALWAYS, "\n"); err = ftp_login (&con->rbuf, user, passwd); /* FTPRERR, FTPSRVERR, WRITEFAILED, FTPLOGREFUSED, FTPLOGINC */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPSRVERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Error in server greeting.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPLOGREFUSED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("The server refuses login.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return FTPLOGREFUSED; break; case FTPLOGINC: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Login incorrect.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return FTPLOGINC; break; case FTPOK: if (!opt.server_response) logputs (LOG_VERBOSE, _("Logged in!\n")); break; default: abort (); exit (1); break; } /* Third: Get the system type */ if (!opt.server_response) logprintf (LOG_VERBOSE, "==> SYST ... "); err = ftp_syst (&con->rbuf, &con->rs); /* FTPRERR */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPSRVERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Server error, can't determine system type.\n")); break; case FTPOK: /* Everything is OK. */ break; default: abort (); break; } if (!opt.server_response) logputs (LOG_VERBOSE, _("done. ")); /* Fourth: Find the initial ftp directory */ if (!opt.server_response) logprintf (LOG_VERBOSE, "==> PWD ... "); err = ftp_pwd(&con->rbuf, &con->id); /* FTPRERR */ switch (err) { case FTPRERR: case FTPSRVERR : logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPOK: /* Everything is OK. */ break; default: abort (); break; } /* VMS will report something like "PUB$DEVICE:[INITIAL.FOLDER]". Convert it to "/INITIAL/FOLDER" */ if (con->rs == ST_VMS) { char *path = strchr (con->id, '['); char *pathend = path ? strchr (path + 1, ']') : NULL; if (!path || !pathend) DEBUGP (("Initial VMS directory not in the form [...]!\n")); else { char *idir = con->id; DEBUGP (("Preprocessing the initial VMS directory\n")); DEBUGP ((" old = '%s'\n", con->id)); /* We do the conversion in-place by copying the stuff between [ and ] to the beginning, and changing dots to slashes at the same time. */ *idir++ = '/'; for (++path; path < pathend; path++, idir++) *idir = *path == '.' ? '/' : *path; *idir = '\0'; DEBUGP ((" new = '%s'\n\n", con->id)); } } if (!opt.server_response) logputs (LOG_VERBOSE, _("done.\n")); /* Fifth: Set the FTP type. */ if (!opt.server_response) logprintf (LOG_VERBOSE, "==> TYPE %c ... ", TOUPPER (u->ftp_type)); err = ftp_type (&con->rbuf, TOUPPER (u->ftp_type)); /* FTPRERR, WRITEFAILED, FTPUNKNOWNTYPE */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPUNKNOWNTYPE: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("Unknown type `%c', closing control connection.\n"), TOUPPER (u->ftp_type)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; case FTPOK: /* Everything is OK. */ break; default: abort (); break; } if (!opt.server_response) logputs (LOG_VERBOSE, _("done. ")); } /* do login */ if (cmd & DO_CWD) { if (!*u->dir) logputs (LOG_VERBOSE, _("==> CWD not needed.\n")); else { char *target = u->dir; DEBUGP (("changing working directory\n")); /* Change working directory. To change to a non-absolute Unix directory, we need to prepend initial directory (con->id) to it. Absolute directories "just work". */ if (*target != '/') { int idlen = strlen (con->id); char *ntarget = (char *)alloca (idlen + 1 + strlen (u->dir) + 1); /* idlen == 1 means con->id = "/" */ sprintf (ntarget, "%s%s%s", con->id, idlen == 1 ? "" : "/", target); DEBUGP (("Prepended initial PWD to relative path:\n")); DEBUGP ((" old: '%s'\n new: '%s'\n", target, ntarget)); target = ntarget; } /* If the FTP host runs VMS, we will have to convert the absolute directory path in UNIX notation to absolute directory path in VMS notation as VMS FTP servers do not like UNIX notation of absolute paths. "VMS notation" is [dir.subdir.subsubdir]. */ if (con->rs == ST_VMS) { char *tmpp; char *ntarget = (char *)alloca (strlen (target) + 2); /* We use a converted initial dir, so directories in TARGET will be separated with slashes, something like "/INITIAL/FOLDER/DIR/SUBDIR". Convert that to "[INITIAL.FOLDER.DIR.SUBDIR]". */ strcpy (ntarget, target); assert (*ntarget == '/'); *ntarget = '['; for (tmpp = ntarget + 1; *tmpp; tmpp++) if (*tmpp == '/') *tmpp = '.'; *tmpp++ = ']'; *tmpp = '\0'; DEBUGP (("Changed file name to VMS syntax:\n")); DEBUGP ((" Unix: '%s'\n VMS: '%s'\n", target, ntarget)); target = ntarget; } if (!opt.server_response) logprintf (LOG_VERBOSE, "==> CWD %s ... ", target); err = ftp_cwd (&con->rbuf, target); /* FTPRERR, WRITEFAILED, FTPNSFOD */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPNSFOD: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("No such directory `%s'.\n\n"), u->dir); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPOK: /* fine and dandy */ break; default: abort (); break; } if (!opt.server_response) logputs (LOG_VERBOSE, _("done.\n")); } } else /* do not CWD */ logputs (LOG_VERBOSE, _("==> CWD not required.\n")); /* If anything is to be retrieved, PORT (or PASV) must be sent. */ if (cmd & (DO_LIST | DO_RETR)) { if (opt.ftp_pasv > 0) { char thost[256]; unsigned short tport; if (!opt.server_response) logputs (LOG_VERBOSE, "==> PASV ... "); err = ftp_pasv (&con->rbuf, pasv_addr); /* FTPRERR, WRITEFAILED, FTPNOPASV, FTPINVPASV */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPNOPASV: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Cannot initiate PASV transfer.\n")); break; case FTPINVPASV: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Cannot parse PASV response.\n")); break; case FTPOK: /* fine and dandy */ break; default: abort (); break; } if (err==FTPOK) { sprintf (thost, "%d.%d.%d.%d", pasv_addr[0], pasv_addr[1], pasv_addr[2], pasv_addr[3]); tport = (pasv_addr[4] << 8) + pasv_addr[5]; DEBUGP ((_("Will try connecting to %s:%hu.\n"), thost, tport)); err = make_connection (&dtsock, thost, tport); switch (err) { /* Do not close the socket in first several cases, since it wasn't created at all. */ case HOSTERR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "%s: %s\n", thost, herrmsg (h_errno)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return HOSTERR; break; case CONSOCKERR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "socket: %s\n", strerror (errno)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return CONSOCKERR; break; case CONREFUSED: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("Connection to %s:%hu refused.\n"), thost, tport); CLOSE (csock); rbuf_uninitialize (&con->rbuf); closeport (dtsock); return CONREFUSED; case CONERROR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "connect: %s\n", strerror (errno)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); closeport (dtsock); return CONERROR; break; default: /* #### What?! */ DO_NOTHING; } passive_mode_open= 1; /* Flag to avoid accept port */ if (!opt.server_response) logputs (LOG_VERBOSE, _("done. ")); } /* err==FTP_OK */ } if (!passive_mode_open) /* Try to use a port command if PASV failed */ { if (!opt.server_response) logputs (LOG_VERBOSE, "==> PORT ... "); err = ftp_port (&con->rbuf); /* FTPRERR, WRITEFAILED, bindport (CONSOCKERR, CONPORTERR, BINDERR, LISTENERR), HOSTERR, FTPPORTERR */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case CONSOCKERR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "socket: %s\n", strerror (errno)); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case CONPORTERR: case BINDERR: case LISTENERR: /* What now? These problems are local... */ logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("Bind error (%s).\n"), strerror (errno)); closeport (dtsock); return err; break; case HOSTERR: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, "%s: %s\n", u->host, herrmsg (h_errno)); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return HOSTERR; break; case FTPPORTERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Invalid PORT.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPOK: /* fine and dandy */ break; default: abort (); break; } /* port switch */ if (!opt.server_response) logputs (LOG_VERBOSE, _("done. ")); } /* dtsock == -1 */ } /* cmd & (DO_LIST | DO_RETR) */ /* Restart if needed. */ if (restval && (cmd & DO_RETR)) { if (!opt.server_response) logprintf (LOG_VERBOSE, "==> REST %ld ... ", restval); err = ftp_rest (&con->rbuf, restval); /* FTPRERR, WRITEFAILED, FTPRESTFAIL */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPRESTFAIL: /* If `-c' is specified and the file already existed when Wget was started, it would be a bad idea for us to start downloading it from scratch, effectively truncating it. */ if (opt.always_rest && (cmd & NO_TRUNCATE)) { logprintf (LOG_NOTQUIET, _("\nREST failed; will not truncate `%s'.\n"), u->local); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return CONTNOTSUPPORTED; } logputs (LOG_VERBOSE, _("\nREST failed, starting from scratch.\n")); restval = 0L; break; case FTPOK: /* fine and dandy */ break; default: abort (); break; } if (err != FTPRESTFAIL && !opt.server_response) logputs (LOG_VERBOSE, _("done. ")); } /* restval && cmd & DO_RETR */ if (cmd & DO_RETR) { if (opt.verbose) { if (!opt.server_response) { if (restval) logputs (LOG_VERBOSE, "\n"); logprintf (LOG_VERBOSE, "==> RETR %s ... ", u->file); } } err = ftp_retr (&con->rbuf, u->file); /* FTPRERR, WRITEFAILED, FTPNSFOD */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPNSFOD: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("No such file `%s'.\n\n"), u->file); closeport (dtsock); return err; break; case FTPOK: /* fine and dandy */ break; default: abort (); break; } if (!opt.server_response) logputs (LOG_VERBOSE, _("done.\n")); expected_bytes = ftp_expected_bytes (ftp_last_respline); } /* do retrieve */ if (cmd & DO_LIST) { if (!opt.server_response) logputs (LOG_VERBOSE, "==> LIST ... "); /* As Maciej W. Rozycki (macro@ds2.pg.gda.pl) says, `LIST' without arguments is better than `LIST .'; confirmed by RFC959. */ err = ftp_list (&con->rbuf, NULL); /* FTPRERR, WRITEFAILED */ switch (err) { case FTPRERR: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("\ Error in server response, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case WRITEFAILED: logputs (LOG_VERBOSE, "\n"); logputs (LOG_NOTQUIET, _("Write failed, closing control connection.\n")); CLOSE (csock); closeport (dtsock); rbuf_uninitialize (&con->rbuf); return err; break; case FTPNSFOD: logputs (LOG_VERBOSE, "\n"); logprintf (LOG_NOTQUIET, _("No such file or directory `%s'.\n\n"), "."); closeport (dtsock); return err; break; case FTPOK: /* fine and dandy */ break; default: abort (); break; } if (!opt.server_response) logputs (LOG_VERBOSE, _("done.\n")); expected_bytes = ftp_expected_bytes (ftp_last_respline); } /* cmd & DO_LIST */ /* Some FTP servers return the total length of file after REST command, others just return the remaining size. */ if (*len && restval && expected_bytes && (expected_bytes == *len - restval)) { DEBUGP (("Lying FTP server found, adjusting.\n")); expected_bytes = *len; } /* If no transmission was required, then everything is OK. */ if (!(cmd & (DO_LIST | DO_RETR))) return RETRFINISHED; if (!passive_mode_open) /* we are not using pasive mode so we need to accept */ { /* Open the data transmission socket by calling acceptport(). */ err = acceptport (&dtsock); /* Possible errors: ACCEPTERR. */ if (err == ACCEPTERR) { logprintf (LOG_NOTQUIET, "accept: %s\n", strerror (errno)); return err; } } /* Open the file -- if opt.dfp is set, use it instead. */ if (!opt.dfp || con->cmd & DO_LIST) { mkalldirs (u->local); if (opt.backups) rotate_backups (u->local); /* #### Is this correct? */ chmod (u->local, 0600); fp = fopen (u->local, restval ? "ab" : "wb"); if (!fp) { logprintf (LOG_NOTQUIET, "%s: %s\n", u->local, strerror (errno)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); closeport (dtsock); return FOPENERR; } } else { extern int global_download_count; fp = opt.dfp; /* Rewind the output document if the download starts over and if this is the first download. See gethttp() for a longer explanation. */ if (!restval && global_download_count == 0) { /* This will silently fail for streams that don't correspond to regular files, but that's OK. */ rewind (fp); /* ftruncate is needed because opt.dfp is opened in append mode if opt.always_rest is set. */ ftruncate (fileno (fp), 0); clearerr (fp); } } if (*len) { logprintf (LOG_VERBOSE, _("Length: %s"), legible (*len)); if (restval) logprintf (LOG_VERBOSE, _(" [%s to go]"), legible (*len - restval)); logputs (LOG_VERBOSE, "\n"); expected_bytes = *len; /* for get_contents/show_progress */ } else if (expected_bytes) { logprintf (LOG_VERBOSE, _("Length: %s"), legible (expected_bytes)); if (restval) logprintf (LOG_VERBOSE, _(" [%s to go]"), legible (expected_bytes - restval)); logputs (LOG_VERBOSE, _(" (unauthoritative)\n")); } timer = wtimer_new (); /* Get the contents of the document. */ res = get_contents (dtsock, fp, len, restval, expected_bytes, &con->rbuf, 0); con->dltime = wtimer_elapsed (timer); wtimer_delete (timer); tms = time_str (NULL); tmrate = rate (*len - restval, con->dltime, 0); /* Close data connection socket. */ closeport (dtsock); /* Close the local file. */ { /* Close or flush the file. We have to be careful to check for error here. Checking the result of fwrite() is not enough -- errors could go unnoticed! */ int flush_res; if (!opt.dfp || con->cmd & DO_LIST) flush_res = fclose (fp); else flush_res = fflush (fp); if (flush_res == EOF) res = -2; } /* If get_contents couldn't write to fp, bail out. */ if (res == -2) { logprintf (LOG_NOTQUIET, _("%s: %s, closing control connection.\n"), u->local, strerror (errno)); CLOSE (csock); rbuf_uninitialize (&con->rbuf); return FWRITEERR; } else if (res == -1) { logprintf (LOG_NOTQUIET, _("%s (%s) - Data connection: %s; "), tms, tmrate, strerror (errno)); if (opt.server_response) logputs (LOG_ALWAYS, "\n"); } /* Get the server to tell us if everything is retrieved. */ err = ftp_response (&con->rbuf, &respline); /* ...and empty the buffer. */ rbuf_discard (&con->rbuf); if (err != FTPOK) { xfree (respline); /* The control connection is decidedly closed. Print the time only if it hasn't already been printed. */ if (res != -1) logprintf (LOG_NOTQUIET, "%s (%s) - ", tms, tmrate); logputs (LOG_NOTQUIET, _("Control connection closed.\n")); /* If there is an error on the control connection, close it, but return FTPRETRINT, since there is a possibility that the whole file was retrieved nevertheless (but that is for ftp_loop_internal to decide). */ CLOSE (csock); rbuf_uninitialize (&con->rbuf); return FTPRETRINT; } /* err != FTPOK */ /* If retrieval failed for any reason, return FTPRETRINT, but do not close socket, since the control connection is still alive. If there is something wrong with the control connection, it will become apparent later. */ if (*respline != '2') { xfree (respline); if (res != -1) logprintf (LOG_NOTQUIET, "%s (%s) - ", tms, tmrate); logputs (LOG_NOTQUIET, _("Data transfer aborted.\n")); return FTPRETRINT; } xfree (respline); if (res == -1) { /* What now? The data connection was erroneous, whereas the response says everything is OK. We shall play it safe. */ return FTPRETRINT; } if (!(cmd & LEAVE_PENDING)) { /* I should probably send 'QUIT' and check for a reply, but this is faster. #### Is it OK, though? */ CLOSE (csock); rbuf_uninitialize (&con->rbuf); } /* If it was a listing, and opt.server_response is true, print it out. */ if (opt.server_response && (con->cmd & DO_LIST)) { mkalldirs (u->local); fp = fopen (u->local, "r"); if (!fp) logprintf (LOG_ALWAYS, "%s: %s\n", u->local, strerror (errno)); else { char *line; /* The lines are being read with read_whole_line because of no-buffering on opt.lfile. */ while ((line = read_whole_line (fp))) { logprintf (LOG_ALWAYS, "%s\n", line); xfree (line); } fclose (fp); } } /* con->cmd & DO_LIST && server_response */ return RETRFINISHED; } /* A one-file FTP loop. This is the part where FTP retrieval is retried, and retried, and retried, and... This loop either gets commands from con, or (if ON_YOUR_OWN is set), makes them up to retrieve the file given by the URL. */ static uerr_t ftp_loop_internal (struct urlinfo *u, struct fileinfo *f, ccon *con) { int count, orig_lp; long restval, len; char *tms, *tmrate, *locf; uerr_t err; struct stat st; if (!u->local) u->local = url_filename (u); if (opt.noclobber && file_exists_p (u->local)) { logprintf (LOG_VERBOSE, _("File `%s' already there, not retrieving.\n"), u->local); /* If the file is there, we suppose it's retrieved OK. */ return RETROK; } /* Remove it if it's a link. */ remove_link (u->local); if (!opt.output_document) locf = u->local; else locf = opt.output_document; count = 0; if (con->st & ON_YOUR_OWN) con->st = ON_YOUR_OWN; orig_lp = con->cmd & LEAVE_PENDING ? 1 : 0; /* THE loop. */ do { /* Increment the pass counter. */ ++count; sleep_between_retrievals (count); if (con->st & ON_YOUR_OWN) { con->cmd = 0; con->cmd |= (DO_RETR | LEAVE_PENDING); if (rbuf_initialized_p (&con->rbuf)) con->cmd &= ~ (DO_LOGIN | DO_CWD); else con->cmd |= (DO_LOGIN | DO_CWD); } else /* not on your own */ { if (rbuf_initialized_p (&con->rbuf)) con->cmd &= ~DO_LOGIN; else con->cmd |= DO_LOGIN; if (con->st & DONE_CWD) con->cmd &= ~DO_CWD; else con->cmd |= DO_CWD; } /* Assume no restarting. */ restval = 0L; if ((count > 1 || opt.always_rest) && !(con->cmd & DO_LIST) && file_exists_p (locf)) if (stat (locf, &st) == 0 && S_ISREG (st.st_mode)) restval = st.st_size; /* In `-c' is used, check whether the file we're writing to exists and is of non-zero length. If so, we'll refuse to truncate it if the server doesn't support continued downloads. */ if (opt.always_rest && restval > 0) con->cmd |= NO_TRUNCATE; /* Get the current time string. */ tms = time_str (NULL); /* Print fetch message, if opt.verbose. */ if (opt.verbose) { char *hurl = str_url (u->proxy ? u->proxy : u, 1); char tmp[15]; strcpy (tmp, " "); if (count > 1) sprintf (tmp, _("(try:%2d)"), count); logprintf (LOG_VERBOSE, "--%s-- %s\n %s => `%s'\n", tms, hurl, tmp, locf); #ifdef WINDOWS ws_changetitle (hurl, 1); #endif xfree (hurl); } /* Send getftp the proper length, if fileinfo was provided. */ if (f) len = f->size; else len = 0; err = getftp (u, &len, restval, con); /* Time? */ tms = time_str (NULL); tmrate = rate (len - restval, con->dltime, 0); if (!rbuf_initialized_p (&con->rbuf)) con->st &= ~DONE_CWD; else con->st |= DONE_CWD; switch (err) { case HOSTERR: case CONREFUSED: case FWRITEERR: case FOPENERR: case FTPNSFOD: case FTPLOGINC: case FTPNOPASV: case CONTNOTSUPPORTED: /* Fatal errors, give up. */ return err; break; case CONSOCKERR: case CONERROR: case FTPSRVERR: case FTPRERR: case WRITEFAILED: case FTPUNKNOWNTYPE: case CONPORTERR: case BINDERR: case LISTENERR: case ACCEPTERR: case FTPPORTERR: case FTPLOGREFUSED: case FTPINVPASV: printwhat (count, opt.ntry); /* non-fatal errors */ continue; break; case FTPRETRINT: /* If the control connection was closed, the retrieval will be considered OK if f->size == len. */ if (!f || len != f->size) { printwhat (count, opt.ntry); continue; } break; case RETRFINISHED: /* Great! */ break; default: /* Not as great. */ abort (); } /* If we get out of the switch above without continue'ing, we've successfully downloaded a file. Remember this fact. */ downloaded_file(FILE_DOWNLOADED_NORMALLY, locf); if (con->st & ON_YOUR_OWN) { CLOSE (RBUF_FD (&con->rbuf)); rbuf_uninitialize (&con->rbuf); } logprintf (LOG_VERBOSE, _("%s (%s) - `%s' saved [%ld]\n\n"), tms, tmrate, locf, len); if (!opt.verbose && !opt.quiet) { /* Need to hide the password from the URL. The `if' is here so that we don't do the needless allocation every time. */ char *hurl = str_url (u->proxy ? u->proxy : u, 1); logprintf (LOG_NONVERBOSE, "%s URL: %s [%ld] -> \"%s\" [%d]\n", tms, hurl, len, locf, count); xfree (hurl); } if ((con->cmd & DO_LIST)) /* This is a directory listing file. */ { if (!opt.remove_listing) /* --dont-remove-listing was specified, so do count this towards the number of bytes and files downloaded. */ { downloaded_increase (len); opt.numurls++; } /* Deletion of listing files is not controlled by --delete-after, but by the more specific option --dont-remove-listing, and the code to do this deletion is in another function. */ } else /* This is not a directory listing file. */ { /* Unlike directory listing files, don't pretend normal files weren't downloaded if they're going to be deleted. People seeding proxies, for instance, may want to know how many bytes and files they've downloaded through it. */ downloaded_increase (len); opt.numurls++; if (opt.delete_after) { DEBUGP (("Removing file due to --delete-after in" " ftp_loop_internal():\n")); logprintf (LOG_VERBOSE, _("Removing %s.\n"), locf); if (unlink (locf)) logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno)); } } /* Restore the original leave-pendingness. */ if (orig_lp) con->cmd |= LEAVE_PENDING; else con->cmd &= ~LEAVE_PENDING; return RETROK; } while (!opt.ntry || (count < opt.ntry)); if (rbuf_initialized_p (&con->rbuf) && (con->st & ON_YOUR_OWN)) { CLOSE (RBUF_FD (&con->rbuf)); rbuf_uninitialize (&con->rbuf); } return TRYLIMEXC; } /* Return the directory listing in a reusable format. The directory is specifed in u->dir. */ uerr_t ftp_get_listing (struct urlinfo *u, ccon *con, struct fileinfo **f) { uerr_t err; char *olocal = u->local; char *list_filename, *ofile; con->st &= ~ON_YOUR_OWN; con->cmd |= (DO_LIST | LEAVE_PENDING); con->cmd &= ~DO_RETR; /* Get the listing filename. */ ofile = u->file; u->file = LIST_FILENAME; list_filename = url_filename (u); u->file = ofile; u->local = list_filename; DEBUGP ((_("Using `%s' as listing tmp file.\n"), list_filename)); err = ftp_loop_internal (u, NULL, con); u->local = olocal; if (err == RETROK) *f = ftp_parse_ls (list_filename, con->rs); else *f = NULL; if (opt.remove_listing) { if (unlink (list_filename)) logprintf (LOG_NOTQUIET, "unlink: %s\n", strerror (errno)); else logprintf (LOG_VERBOSE, _("Removed `%s'.\n"), list_filename); } xfree (list_filename); con->cmd &= ~DO_LIST; return err; } static uerr_t ftp_retrieve_dirs PARAMS ((struct urlinfo *, struct fileinfo *, ccon *)); static uerr_t ftp_retrieve_glob PARAMS ((struct urlinfo *, ccon *, int)); static struct fileinfo *delelement PARAMS ((struct fileinfo *, struct fileinfo **)); static void freefileinfo PARAMS ((struct fileinfo *f)); /* Retrieve a list of files given in struct fileinfo linked list. If a file is a symbolic link, do not retrieve it, but rather try to set up a similar link on the local disk, if the symlinks are supported. If opt.recursive is set, after all files have been retrieved, ftp_retrieve_dirs will be called to retrieve the directories. */ static uerr_t ftp_retrieve_list (struct urlinfo *u, struct fileinfo *f, ccon *con) { static int depth = 0; uerr_t err; char *olocal, *ofile; struct fileinfo *orig; long local_size; time_t tml; int dlthis; /* Increase the depth. */ ++depth; if (opt.reclevel != INFINITE_RECURSION && depth > opt.reclevel) { DEBUGP ((_("Recursion depth %d exceeded max. depth %d.\n"), depth, opt.reclevel)); --depth; return RECLEVELEXC; } assert (f != NULL); orig = f; con->st &= ~ON_YOUR_OWN; if (!(con->st & DONE_CWD)) con->cmd |= DO_CWD; else con->cmd &= ~DO_CWD; con->cmd |= (DO_RETR | LEAVE_PENDING); if (!rbuf_initialized_p (&con->rbuf)) con->cmd |= DO_LOGIN; else con->cmd &= ~DO_LOGIN; err = RETROK; /* in case it's not used */ while (f) { if (downloaded_exceeds_quota ()) { --depth; return QUOTEXC; } olocal = u->local; ofile = u->file; u->file = f->name; u->local = url_filename (u); err = RETROK; dlthis = 1; if (opt.timestamping && f->type == FT_PLAINFILE) { struct stat st; /* If conversion of HTML files retrieved via FTP is ever implemented, we'll need to stat() .orig here when -K has been specified. I'm not implementing it now since files on an FTP server are much more likely than files on an HTTP server to legitimately have a .orig suffix. */ if (!stat (u->local, &st)) { int eq_size; int cor_val; /* Else, get it from the file. */ local_size = st.st_size; tml = st.st_mtime; /* Compare file sizes only for servers that tell us correct values. Assumme sizes being equal for servers that lie about file size. */ cor_val = (con->rs == ST_UNIX || con->rs == ST_WINNT); eq_size = cor_val ? (local_size == f->size) : 1 ; if (f->tstamp <= tml && eq_size) { /* Remote file is older, file sizes can be compared and are both equal. */ logprintf (LOG_VERBOSE, _("\ Remote file no newer than local file `%s' -- not retrieving.\n"), u->local); dlthis = 0; } else if (eq_size) { /* Remote file is newer or sizes cannot be matched */ logprintf (LOG_VERBOSE, _("\ Remote file is newer than local file `%s' -- retrieving.\n\n"), u->local); } else { /* Sizes do not match */ logprintf (LOG_VERBOSE, _("\ The sizes do not match (local %ld) -- retrieving.\n\n"), local_size); } } } /* opt.timestamping && f->type == FT_PLAINFILE */ switch (f->type) { case FT_SYMLINK: /* If opt.retr_symlinks is defined, we treat symlinks as if they were normal files. There is currently no way to distinguish whether they might be directories, and follow them. */ if (!opt.retr_symlinks) { #ifdef HAVE_SYMLINK if (!f->linkto) logputs (LOG_NOTQUIET, _("Invalid name of the symlink, skipping.\n")); else { struct stat st; /* Check whether we already have the correct symbolic link. */ int rc = lstat (u->local, &st); if (rc == 0) { size_t len = strlen (f->linkto) + 1; if (S_ISLNK (st.st_mode)) { char *link_target = (char *)alloca (len); size_t n = readlink (u->local, link_target, len); if ((n == len - 1) && (memcmp (link_target, f->linkto, n) == 0)) { logprintf (LOG_VERBOSE, _("\ Already have correct symlink %s -> %s\n\n"), u->local, f->linkto); dlthis = 0; break; } } } logprintf (LOG_VERBOSE, _("Creating symlink %s -> %s\n"), u->local, f->linkto); /* Unlink before creating symlink! */ unlink (u->local); if (symlink (f->linkto, u->local) == -1) logprintf (LOG_NOTQUIET, "symlink: %s\n", strerror (errno)); logputs (LOG_VERBOSE, "\n"); } /* have f->linkto */ #else /* not HAVE_SYMLINK */ logprintf (LOG_NOTQUIET, _("Symlinks not supported, skipping symlink `%s'.\n"), u->local); #endif /* not HAVE_SYMLINK */ } else /* opt.retr_symlinks */ { if (dlthis) err = ftp_loop_internal (u, f, con); } /* opt.retr_symlinks */ break; case FT_DIRECTORY: if (!opt.recursive) logprintf (LOG_NOTQUIET, _("Skipping directory `%s'.\n"), f->name); break; case FT_PLAINFILE: /* Call the retrieve loop. */ if (dlthis) err = ftp_loop_internal (u, f, con); break; case FT_UNKNOWN: logprintf (LOG_NOTQUIET, _("%s: unknown/unsupported file type.\n"), f->name); break; } /* switch */ /* Set the time-stamp information to the local file. Symlinks are not to be stamped because it sets the stamp on the original. :( */ if (!(f->type == FT_SYMLINK && !opt.retr_symlinks) && f->tstamp != -1 && dlthis && file_exists_p (u->local)) { /* #### This code repeats in http.c and ftp.c. Move it to a function! */ const char *fl = NULL; if (opt.output_document) { if (opt.od_known_regular) fl = opt.output_document; } else fl = u->local; if (fl) touch (fl, f->tstamp); } else if (f->tstamp == -1) logprintf (LOG_NOTQUIET, _("%s: corrupt time-stamp.\n"), u->local); if (f->perms && f->type == FT_PLAINFILE && dlthis) chmod (u->local, f->perms); else DEBUGP (("Unrecognized permissions for %s.\n", u->local)); xfree (u->local); u->local = olocal; u->file = ofile; /* Break on fatals. */ if (err == QUOTEXC || err == HOSTERR || err == FWRITEERR) break; con->cmd &= ~ (DO_CWD | DO_LOGIN); f = f->next; } /* while */ /* We do not want to call ftp_retrieve_dirs here */ if (opt.recursive && !(opt.reclevel != INFINITE_RECURSION && depth >= opt.reclevel)) err = ftp_retrieve_dirs (u, orig, con); else if (opt.recursive) DEBUGP ((_("Will not retrieve dirs since depth is %d (max %d).\n"), depth, opt.reclevel)); --depth; return err; } /* Retrieve the directories given in a file list. This function works by simply going through the linked list and calling ftp_retrieve_glob on each directory entry. The function knows about excluded directories. */ static uerr_t ftp_retrieve_dirs (struct urlinfo *u, struct fileinfo *f, ccon *con) { char *odir; char *current_container = NULL; int current_length = 0; for (; f; f = f->next) { int len; if (downloaded_exceeds_quota ()) break; if (f->type != FT_DIRECTORY) continue; odir = u->dir; len = strlen (u->dir) + 1 + strlen (f->name) + 1; /* Allocate u->dir off stack, but reallocate only if a larger string is needed. */ if (len > current_length) current_container = (char *)alloca (len); u->dir = current_container; if (*odir == '\0' || (*odir == '/' && *(odir + 1) == '\0')) /* If ODIR is empty or just "/", simply append f->name to ODIR. (In the former case, to preserve u->dir being relative; in the latter case, to avoid double slash.) */ sprintf (u->dir, "%s%s", odir, f->name); else /* Else, use a separator. */ sprintf (u->dir, "%s/%s", odir, f->name); DEBUGP (("Composing new CWD relative to the initial directory.\n")); DEBUGP ((" odir = '%s'\n f->name = '%s'\n u->dir = '%s'\n\n", odir, f->name, u->dir)); if (!accdir (u->dir, ALLABS)) { logprintf (LOG_VERBOSE, _("\ Not descending to `%s' as it is excluded/not-included.\n"), u->dir); u->dir = odir; continue; } con->st &= ~DONE_CWD; ftp_retrieve_glob (u, con, GETALL); /* Set the time-stamp? */ u->dir = odir; } if (opt.quota && opt.downloaded > opt.quota) return QUOTEXC; else return RETROK; } /* A near-top-level function to retrieve the files in a directory. The function calls ftp_get_listing, to get a linked list of files. Then it weeds out the file names that do not match the pattern. ftp_retrieve_list is called with this updated list as an argument. If the argument ACTION is GETONE, just download the file (but first get the listing, so that the time-stamp is heeded); if it's GLOBALL, use globbing; if it's GETALL, download the whole directory. */ static uerr_t ftp_retrieve_glob (struct urlinfo *u, ccon *con, int action) { struct fileinfo *orig, *start; uerr_t res; con->cmd |= LEAVE_PENDING; res = ftp_get_listing (u, con, &orig); if (res != RETROK) return res; start = orig; /* First: weed out that do not conform the global rules given in opt.accepts and opt.rejects. */ if (opt.accepts || opt.rejects) { struct fileinfo *f = orig; while (f) { if (f->type != FT_DIRECTORY && !acceptable (f->name)) { logprintf (LOG_VERBOSE, _("Rejecting `%s'.\n"), f->name); f = delelement (f, &start); } else f = f->next; } } /* Now weed out the files that do not match our globbing pattern. If we are dealing with a globbing pattern, that is. */ if (*u->file && (action == GLOBALL || action == GETONE)) { int matchres = 0; struct fileinfo *f = start; while (f) { matchres = fnmatch (u->file, f->name, 0); if (matchres == -1) { logprintf (LOG_NOTQUIET, "%s: %s\n", u->local, strerror (errno)); break; } if (matchres == FNM_NOMATCH) f = delelement (f, &start); /* delete the element from the list */ else f = f->next; /* leave the element in the list */ } if (matchres == -1) { freefileinfo (start); return RETRBADPATTERN; } } res = RETROK; if (start) { /* Just get everything. */ ftp_retrieve_list (u, start, con); } else if (!start) { if (action == GLOBALL) { /* No luck. */ /* #### This message SUCKS. We should see what was the reason that nothing was retrieved. */ logprintf (LOG_VERBOSE, _("No matches on pattern `%s'.\n"), u->file); } else /* GETONE or GETALL */ { /* Let's try retrieving it anyway. */ con->st |= ON_YOUR_OWN; res = ftp_loop_internal (u, NULL, con); return res; } } freefileinfo (start); if (downloaded_exceeds_quota ()) return QUOTEXC; else /* #### Should we return `res' here? */ return RETROK; } /* The wrapper that calls an appropriate routine according to contents of URL. Inherently, its capabilities are limited on what can be encoded into a URL. */ uerr_t ftp_loop (struct urlinfo *u, int *dt) { ccon con; /* FTP connection */ uerr_t res; *dt = 0; memset (&con, 0, sizeof (con)); rbuf_uninitialize (&con.rbuf); con.st = ON_YOUR_OWN; con.rs = ST_UNIX; con.id = NULL; res = RETROK; /* in case it's not used */ /* If the file name is empty, the user probably wants a directory index. We'll provide one, properly HTML-ized. Unless opt.htmlify is 0, of course. :-) */ if (!*u->file && !opt.recursive) { struct fileinfo *f; res = ftp_get_listing (u, &con, &f); if (res == RETROK) { if (opt.htmlify) { char *filename = (opt.output_document ? xstrdup (opt.output_document) : (u->local ? xstrdup (u->local) : url_filename (u))); res = ftp_index (filename, u, f); if (res == FTPOK && opt.verbose) { if (!opt.output_document) { struct stat st; long sz; if (stat (filename, &st) == 0) sz = st.st_size; else sz = -1; logprintf (LOG_NOTQUIET, _("Wrote HTML-ized index to `%s' [%ld].\n"), filename, sz); } else logprintf (LOG_NOTQUIET, _("Wrote HTML-ized index to `%s'.\n"), filename); } xfree (filename); } freefileinfo (f); } } else { int wild = has_wildcards_p (u->file); if ((opt.ftp_glob && wild) || opt.recursive || opt.timestamping) { /* ftp_retrieve_glob is a catch-all function that gets called if we need globbing, time-stamping or recursion. Its third argument is just what we really need. */ ftp_retrieve_glob (u, &con, (opt.ftp_glob && wild) ? GLOBALL : GETONE); } else res = ftp_loop_internal (u, NULL, &con); } if (res == FTPOK) res = RETROK; if (res == RETROK) *dt |= RETROKF; /* If a connection was left, quench it. */ if (rbuf_initialized_p (&con.rbuf)) CLOSE (RBUF_FD (&con.rbuf)); FREE_MAYBE (con.id); con.id = NULL; return res; } /* Delete an element from the fileinfo linked list. Returns the address of the next element, or NULL if the list is exhausted. It can modify the start of the list. */ static struct fileinfo * delelement (struct fileinfo *f, struct fileinfo **start) { struct fileinfo *prev = f->prev; struct fileinfo *next = f->next; xfree (f->name); FREE_MAYBE (f->linkto); xfree (f); if (next) next->prev = prev; if (prev) prev->next = next; else *start = next; return next; } /* Free the fileinfo linked list of files. */ static void freefileinfo (struct fileinfo *f) { while (f) { struct fileinfo *next = f->next; xfree (f->name); if (f->linkto) xfree (f->linkto); xfree (f); f = next; } }