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ftp.c
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1997-02-08
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/* File Transfer Protocol support.
Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
This program 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.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_STRING_H
# include <string.h>
#else
# include <strings.h>
#endif
#include <ctype.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#ifdef WINDOWS
# include <winsock.h>
#else
# include <netinet/in.h>
#endif /* WINDOWS */
#include <assert.h>
#include "wget.h"
#include "options.h"
#include "utils.h"
#include "url.h"
#include "ftp.h"
#include "ftp-basic.h"
#include "html.h"
#include "connect.h"
#include "host.h"
#include "http.h"
#include "mtch.h"
#include "retr.h"
#include "netrc.h"
extern struct options opt;
extern char ftp_last_respline[128];
#ifndef errno
extern int errno;
#endif
#ifndef h_errno
extern int h_errno;
#endif
/* 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. */
uerr_t
getftp(const urlinfo *u, long *len, long restval, ccon *con)
{
int csock, dtsock, res;
uerr_t err;
FILE *fp;
char *user, *passwd, *respline;
char *tms, *tmrate;
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:
Make sure that not both LIST and RETR are 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 = con->fd;
else /* cmd & DO_LOGIN */
{
/* Login to the server: */
/* First: Establish the control connection. */
if (opt.verbose)
fprintf(opt.lfile, "Connecting to %s:%hu... ", u->host, u->port);
err = make_connection(&csock, u->host, u->port);
if (cmd & LEAVE_PENDING)
con->fd = csock;
else
con->fd = -1;
switch (err)
{
/* Do not close the socket in first several cases,
since it wasn't created at all. */
case HOSTERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "%s: %s\n", u->host, herrmsg(h_errno));
}
return HOSTERR;
break;
case CONSOCKERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "socket: %s\n", mystrerror(errno));
}
return CONSOCKERR;
break;
case CONREFUSED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Connection to %s:%hu refused.\n", u->host,
u->port);
}
CLOSE(csock);
con->fd = -1;
return CONREFUSED;
case CONERROR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "connect: %s\n", mystrerror(errno));
}
CLOSE(csock);
con->fd = -1;
return CONERROR;
break;
}
/* Since this is a new connection, we may safely discard
anything left in the buffer. */
buf_discard();
/* Second: Login with proper USER/PASS sequence. */
if (opt.verbose)
{
fprintf(opt.lfile, "connected!\n");
fprintf(opt.lfile, "Logging in as %s ... ", user);
if (opt.server_response)
fputc('\n', opt.lfile);
}
err = ftp_login(csock, user, passwd);
/* FTPRERR, FTPSRVERR, WRITEFAILED, FTPLOGREFUSED, FTPLOGINC. */
switch (err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case FTPSRVERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server greeting.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case FTPLOGREFUSED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "The server refuses login.\n");
}
CLOSE(csock);
con->fd = -1;
return FTPLOGREFUSED;
break;
case FTPLOGINC:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Login incorrect.\n");
}
CLOSE(csock);
con->fd = -1;
return FTPLOGINC;
break;
case FTPOK:
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "Logged in!\n");
break;
default:
assert(0);
exit(1);
break;
}
/* Third: Set type to Image (binary). */
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "==> TYPE I ... ");
err = ftp_type(csock, 'I');
/* FTPRERR, WRITEFAILED, FTPUNKNOWNTYPE. */
switch (err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case FTPUNKNOWNTYPE:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Unknown type(?), closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
case FTPOK:
/* Everything is OK. */
break;
default:
assert(0);
break;
}
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "done. ");
} /* do login */
if (cmd & DO_CWD)
{
if (!*u->dir)
{
if (opt.verbose)
fprintf(opt.lfile, "==> CWD not needed.\n");
}
else
{
/* Change working directory. */
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "==> CWD %s ... ", u->dir);
err = ftp_cwd(csock, u->dir);
/* FTPRERR, WRITEFAILED, FTPNSFOD */
switch (err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Error in server response, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case FTPNSFOD:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "No such directory `%s'.\n\n", u->dir);
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case FTPOK:
/* fine and dandy */
break;
default:
assert(0);
break;
}
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "done.\n");
}
}
else /* do not CWD */
{
if (opt.verbose)
fprintf(opt.lfile, "==> 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)
{
char thost[256];
unsigned short tport;
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "==> PASV ... ");
err = ftp_pasv(csock, pasv_addr);
/* FTPRERR, WRITEFAILED, FTPNOPASV, FTPINVPASV */
switch(err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
con->fd = -1;
return err;
break;
case FTPNOPASV:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Cannot initiate PASV transfer.\n");
}
break;
case FTPINVPASV:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Cannot parse PASV response.\n");
}
break;
case FTPOK:
/* fine and dandy */
break;
default:
assert(0);
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];
#ifdef DEBUG
if (opt.debug)
fprintf(opt.lfile, "Will try connecting to %s:%hu.\n", thost,
tport);
#endif
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:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "%s: %s\n", thost, herrmsg(h_errno));
}
CLOSE(csock);
con->fd = -1;
return HOSTERR;
break;
case CONSOCKERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "socket: %s\n", mystrerror(errno));
}
CLOSE(csock);
con->fd = -1;
return CONSOCKERR;
break;
case CONREFUSED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Connection to %s:%hu refused.\n",
thost, tport);
}
CLOSE(csock);
con->fd = -1;
closeport(dtsock);
return CONREFUSED;
case CONERROR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "connect: %s\n", mystrerror(errno));
}
CLOSE(csock);
con->fd = -1;
closeport(dtsock);
return CONERROR;
break;
}
passive_mode_open= 1; /* Flag to avoid accept port */
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "done. ");
} /* err==FTP_OK */
}
if (!passive_mode_open) /* Try to use a port command if PASV failed */
{
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "==> PORT ... ");
err = ftp_port(csock);
/* FTPRERR, WRITEFAILED, bindport (CONSOCKERR, CONPORTERR, BINDERR,
LISTENERR), HOSTERR, FTPPORTERR */
switch(err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case CONSOCKERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "socket: %s\n", mystrerror(errno));
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case CONPORTERR: case BINDERR: case LISTENERR:
/* What now? These are local troubles... */
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Bind error (%s).\n", mystrerror(errno));
}
closeport(dtsock);
return err;
break;
case HOSTERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "%s: %s\n", u->host, herrmsg(h_errno));
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return HOSTERR;
break;
case FTPPORTERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Invalid PORT.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case FTPOK:
/* fine and dandy */
break;
default:
assert(0);
break;
} /* port switch */
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "done. ");
} /* dtsock==-1 */
} /* cmd & (DO_LIST | DO_RETR) */
/* Restart if needed. */
if (restval && (cmd & DO_RETR))
{
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "==> REST %ld ... ", restval);
err = ftp_rest(csock, restval);
/* FTPRERR, WRITEFAILED, FTPRESTFAIL. */
switch (err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case FTPRESTFAIL:
if (opt.verbose)
fprintf(opt.lfile, "\nREST failed, starting from scratch.\n");
restval = 0L;
break;
case FTPOK:
/* fine and dandy */
break;
default:
assert(0);
break;
}
if (opt.verbose)
{
if (err != FTPRESTFAIL && !opt.server_response)
fprintf(opt.lfile, "done. ");
}
} /* restval && cmd & DO_RETR */
if (cmd & DO_RETR)
{
if (opt.verbose)
{
if (!opt.server_response)
{
if (restval)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "==> RETR %s ... ", u->file);
}
}
err = ftp_retr(csock, u->file);
/* FTPRERR, WRITEFAILED, FTPNSFOD */
switch (err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case FTPNSFOD:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "No such file `%s'.\n\n", u->file);
}
closeport(dtsock);
return err;
break;
case FTPOK:
/* fine and dandy */
break;
default:
assert(0);
break;
}
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "done.\n");
expected_bytes = ftp_expected_bytes(ftp_last_respline);
} /* do retrieve */
if (cmd & DO_LIST)
{
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "==> LIST ");
/* As Maciej W. Rozycki (macro@ds2.pg.gda.pl) says, `LIST'
without arguments is better than `LIST .'; confirmed by
RFC959. */
err = ftp_list(csock, NULL);
/* FTPRERR, WRITEFAILED */
switch (err)
{
case FTPRERR:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "Error in server response, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case WRITEFAILED:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile,
"Write failed, closing control connection.\n");
}
CLOSE(csock);
closeport(dtsock);
con->fd = -1;
return err;
break;
case FTPNSFOD:
if (!opt.quiet)
{
if (opt.verbose)
fprintf(opt.lfile, "\n");
fprintf(opt.lfile, "No such file or directory `%s'.\n\n", ".");
}
closeport(dtsock);
return err;
break;
case FTPOK:
/* fine and dandy */
break;
default:
assert(0);
break;
}
if (opt.verbose && !opt.server_response)
fprintf(opt.lfile, "done.\n");
expected_bytes = ftp_expected_bytes(ftp_last_respline);
} /* cmd & DO_LIST */
/* 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)
{
if (!opt.quiet)
fprintf(opt.lfile, "accept: %s\n", mystrerror(errno));
return err;
}
}
/* Open the file -- if opt.dfp is set, use it instead. */
if (!opt.dfp || con->cmd & DO_LIST)
{
mkalldirs(u->local);
fp = fopen(u->local, restval ? "ab" : "wb");
if (!fp)
{
if (!opt.quiet)
fprintf(opt.lfile, "%s: %s\n", u->local, mystrerror(errno));
CLOSE(csock);
con->fd = -1;
closeport(dtsock);
return FOPENERR;
}
}
else
fp = opt.dfp;
if (opt.verbose)
{
if (*len)
{
fprintf(opt.lfile, "Length: %s", legible(*len));
if (restval)
fprintf(opt.lfile, " [%s to go]", legible(*len - restval));
putc('\n', opt.lfile);
}
else if (expected_bytes)
{
fprintf(opt.lfile, "Length: %s", legible(expected_bytes));
if (restval)
fprintf(opt.lfile, " [%s to go]", legible(expected_bytes - restval));
fprintf(opt.lfile, " (unauthoritative)\n");
}
} /* opt.verbose */
reset_timer();
/* Get the contents of the document. */
res = get_contents(dtsock, fp, len, restval, 1);
con->dltime = elapsed_time();
tms = time_str(NULL);
tmrate = rate(*len - restval, con->dltime);
/* Close data connection socket. */
closeport(dtsock);
/* Close the local file. */
if (!opt.dfp || con->cmd & DO_LIST)
fclose(fp);
else
fflush(fp);
/* If get_contents couldn't write to fp, bail out. */
if (res == -2)
{
if (!opt.quiet)
fprintf(opt.lfile, "%s: %s, closing control connection.\n",
u->local, mystrerror(errno));
CLOSE(csock);
con->fd = -1;
return FWRITEERR;
}
else if (res == -1)
{
if (!opt.quiet)
{
fprintf(opt.lfile, "%s (%s) - Data connection: %s; ",
tms, tmrate, mystrerror(errno));
if (opt.server_response)
fputc('\n', opt.lfile);
}
}
/* Get the server to tell us if everything is retrieved. */
err = ftp_response(csock, &respline);
/* ...and empty the buffer. */
buf_discard();
if (err != FTPOK)
{
free(respline);
if (!opt.quiet)
{
/* The control connection is decidedly closed. Print the
time only if it hasn't already been printed. */
if (res != -1)
fprintf(opt.lfile, "%s (%s) - ", tms, tmrate);
fprintf(opt.lfile, "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);
con->fd = -1;
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 c. connection, it
will become apparent later. */
if (*respline != '2')
{
free(respline);
if (res != -1)
fprintf(opt.lfile, "%s (%s) - ", tms, tmrate);
fprintf(opt.lfile, "Data transfer aborted.\n");
return FTPRETRINT;
}
free(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. :-) */
CLOSE(csock);
con->fd = -1;
}
/* 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)
{
if (!opt.quiet)
fprintf(opt.lfile, "%s: %s\n", u->local, mystrerror(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)))
{
fprintf(opt.lfile, "%s\n", line);
free(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. */
uerr_t
ftp_loop_internal(urlinfo *u, struct fileinfo *f, ccon *con)
{
static int first_retrieval = 1;
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 && exists(u->local))
{
if (opt.verbose)
fprintf(opt.lfile, "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;
/* Wait before the retrieval (unless this is the very first
retrieval). */
if (!first_retrieval && opt.wait)
sleep(opt.wait);
if (first_retrieval)
first_retrieval = 0;
if (con->st & ON_YOUR_OWN)
{
con->cmd = 0;
con->cmd |= (DO_RETR | LEAVE_PENDING);
if (con->fd != -1)
con->cmd &= ~(DO_LOGIN | DO_CWD);
else
con->cmd |= (DO_LOGIN | DO_CWD);
}
else /* not on your own */
{
if (con->fd != -1)
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)
&& exists(u->local))
if (stat(u->local, &st) == 0)
restval = st.st_size;
/* 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);
fprintf(opt.lfile,
"--%s-- %s\n %s => `%s'\n",
tms, hurl, tmp, locf);
free(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);
if (con->fd == -1)
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:
/* 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-so-great */
assert(0);
}
if (con->st & ON_YOUR_OWN)
{
CLOSE(con->fd);
con->fd = -1;
}
if (opt.verbose)
fprintf(opt.lfile, "%s (%s) - `%s' saved [%ld]\n\n",
tms, tmrate, locf, len);
else if (!opt.quiet)
fprintf(opt.lfile, "%s URL: %s [%ld] -> \"%s\" [%d]\n",
tms, u->url, len, locf, count);
/* Do not count listings among the downloaded stuff, since they
will get deleted anyway. */
if (!(con->cmd & DO_LIST))
{
++opt.numurls;
opt.downloaded += len;
}
/* 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 (con->fd && (con->st & ON_YOUR_OWN))
{
CLOSE(con->fd);
con->fd = -1;
}
return TRYLIMEXC;
}
/* Return the directory listing in a reusable format. The directory is
speicifed in u->dir. */
struct fileinfo *
ftp_get_listing(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;
#ifdef DEBUG
if (opt.debug)
fprintf(opt.lfile, "Using `%s' as listing tmp file.\n", list_filename);
#endif
err = ftp_loop_internal(u, NULL, con);
u->local = olocal;
if (err == RETROK)
f = ftp_parse_ls(list_filename);
else
f = NULL;
if (opt.remove_listing)
{
if (unlink(list_filename))
{
if (!opt.quiet)
fprintf(opt.lfile, "unlink: %s\n", mystrerror(errno));
}
else if (opt.verbose)
fprintf(opt.lfile, "Removed `%s'.\n", list_filename);
}
free(list_filename);
con->cmd &= ~DO_LIST;
return 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. */
uerr_t
ftp_retrieve_list(urlinfo *u, struct fileinfo *f, ccon *con)
{
void my_touch PARAMS((char *, time_t));
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.maxreclevel && depth > opt.maxreclevel)
{
#ifdef DEBUG
if (opt.debug)
fprintf(opt.lfile, "Recursion depth %d exceeded max. depth %d.\n",
depth, opt.maxreclevel);
#endif
--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 (con->fd == -1)
con->cmd |= DO_LOGIN;
else
con->cmd &= ~DO_LOGIN;
err = RETROK; /* In case it's not used. */
while (f)
{
if (opt.quota && opt.downloaded > opt.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 == PLAINFILE)
{
struct stat st;
if (!stat(u->local, &st))
{
/* Else, get it from the file. */
local_size = st.st_size;
tml = st.st_mtime;
if (local_size == f->size && tml >= f->tstamp)
{
if (opt.verbose)
fprintf(opt.lfile, "Local file `%s' is more recent, not retrieving.\n\n", u->local);
dlthis = 0;
}
else if (local_size != f->size)
{
if (opt.verbose)
fprintf(opt.lfile, "The sizes do not match (local %ld), retrieving.\n", local_size);
}
}
} /* opt.timestamping && f->type == PLAINFILE */
switch (f->type)
{
case 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)
{
if (!opt.quiet)
fprintf(opt.lfile, "Invalid name of the symlink, skipping.\n");
}
else /* have f->linkto */
{
if (*f->linkto != '/')
{
if (opt.verbose)
fprintf(opt.lfile, "Creating symlink %s -> %s\n",
u->local, f->linkto);
unlink(u->local); /* Unlink before creating symlink! */
if (symlink(f->linkto, u->local) == -1)
{
if (!opt.quiet)
fprintf(opt.lfile, "symlink: %s\n", mystrerror(errno));
}
fputc('\n', opt.lfile);
}
else
{
if (!opt.quiet)
fprintf(opt.lfile, "Will not create symlink `%s'.\n", f->linkto);
}
} /* have f->linkto */
#else /* not HAVE_SYMLINK */
if (!opt.quiet)
fprintf(opt.lfile,
"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 DIRECTORY:
if (!opt.recursive)
fprintf(opt.lfile, "Skipping directory `%s'.\n", f->name);
break;
case PLAINFILE:
/* Call the retrieve loop! */
if (dlthis)
err = ftp_loop_internal(u, f, con);
break;
case UNKNOWN:
if (!opt.quiet)
fprintf(opt.lfile, "%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 (!opt.dfp
&& !(f->type == SYMLINK && !opt.retr_symlinks)
&& f->tstamp != -1
&& exists(u->local))
{
my_touch(u->local, f->tstamp);
}
else if (f->tstamp == -1)
{
if (!opt.quiet)
fprintf(opt.lfile, "%s: corrupt time-stamp.\n", u->local);
}
free(u->local);
u->local = olocal;
u->file = ofile;
if (err != RETROK)
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.maxreclevel && depth >= opt.maxreclevel))
err = ftp_retrieve_dirs(u, orig, con);
else if (opt.recursive)
{
#ifdef DEBUG
if (opt.debug)
fprintf(opt.lfile,
"Will not retrieve dirs since depth is %d (max %d).\n",
depth, opt.maxreclevel);
#endif
}
--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. */
uerr_t
ftp_retrieve_dirs(urlinfo *u, struct fileinfo *f, ccon *con)
{
char *odir;
int l;
for (; f; f = f->next)
{
if (opt.quota && opt.downloaded > opt.quota)
break;
if (f->type != DIRECTORY)
continue;
odir = u->dir;
l = strlen(u->dir);
u->dir = nmalloc(1 + l + 1 + strlen(f->name) + 1);
/* When retrieving recursively, all directories must be
absolute. This restriction will be lifted in the future. */
sprintf(u->dir, "/%s%s%s", odir + (*odir == '/'),
(!*odir || (*odir == '/' && !*(odir + 1))) ? "" : "/", f->name);
if (!accdir(u->dir, ALLABS))
{
if (opt.verbose)
fprintf(opt.lfile, "Not descending to `%s' as it is excluded/not-included.\n",
u->dir);
free(u->dir);
u->dir = odir;
continue;
}
con->st &= ~DONE_CWD;
ftp_retrieve_glob(u, con, GETALL);
/* Set the time-stamp? */
free(u->dir);
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. */
uerr_t
ftp_retrieve_glob(urlinfo *u, ccon *con, int action)
{
struct fileinfo *f, *orig, *start;
int matchres;
uerr_t res;
con->cmd |= LEAVE_PENDING;
orig = ftp_get_listing(u, con);
start = orig;
/* First: weed out that do not conform the global rules given in
opt.accepts and opt.rejects. */
if (opt.accepts || opt.rejects)
{
f = orig;
while (f)
{
if (f->type != DIRECTORY && !acceptable(f->name))
{
if (opt.verbose)
fprintf(opt.lfile, "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))
{
matchres = 0;
f = start;
while (f)
{
matchres = fnmatch(u->file, f->name, 0);
if (matchres == -1)
{
if (!opt.quiet)
fprintf(opt.lfile, "%s: %s\n", u->local, mystrerror(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. */
if (opt.verbose)
fprintf(opt.lfile, "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 (opt.quota && opt.downloaded > opt.quota)
return QUOTEXC;
else
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(urlinfo *u, int *dt)
{
ccon con; /* FTP connection. */
uerr_t res;
struct fileinfo *f;
*dt = 0;
con.fd = -1;
con.st = ON_YOUR_OWN;
res = RETROK; /* In case it's not used. */
/* If the file name is empty, the user probably wants a directory
index. Wel'll provide one, properly HTML-ized. Unless
opt.htmlify is 0, of course. :-) */
if (!*u->file && !opt.recursive)
{
f = ftp_get_listing(u, &con);
if (f)
{
if (opt.htmlify)
{
char *filename;
filename = url_filename(u);
res = ftp_index(filename, u, f);
if (res == FTPOK && opt.verbose)
{
struct stat st;
long sz;
if (stat(filename, &st) == 0)
sz = st.st_size;
else
sz = -1;
fprintf(opt.lfile, "Wrote HTML-ized index to `%s' [%ld].\n",
filename, (long)st.st_size);
}
free(filename);
}
freefileinfo(f);
}
}
else
{
int wild = has_wildcards(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 (con.fd != -1)
CLOSE(con.fd);
return res;
}
/* Deletes 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. */
struct fileinfo *
delelement(struct fileinfo *f, struct fileinfo **start)
{
struct fileinfo *prev, *next;
prev = f->prev;
next = f->next;
if (next)
next->prev = prev;
if (!prev)
{
*start = next;
if (!next)
return NULL;
free(f->name);
if (f->linkto)
free(f->linkto);
free(f);
}
else
prev->next = next;
return next;
}
/* Free the fileinfo linked list of files. */
void
freefileinfo(struct fileinfo *f)
{
struct fileinfo *p;
while (f)
{
p = f->next;
free(f->name);
if (f->linkto)
free(f->linkto);
free(f);
f = p;
}
}