mirrors/mc
1
0
Fork 0
mirror of https://github.com/MidnightCommander/mc synced 2024-12-23 04:46:55 +03:00
Code Issues Packages Projects Releases Wiki Activity
26f6e92abf
mc/vfs/ftpfs.c
Miguel de Icaza 51e39b09b5 Mon Mar 2 12:11:37 1998 Norbert Warmuth <k3190@fh-sw.de> 
* vfs/ftpfs.c (changetype): Removed the hack which always forced
	sending the command "TYPE I" when changing to binary transfer mode
	was requested even when MC thought the connection was already in
	binary mode (bucket->isbinary == 1). The correct fix is now in
	login_server.

	* vfs/ftpfs.c (login_server): Set the transfer mode stored in
	the bucket to UNKNOWN (the bucket might be reused and the old
	transfer mode isn't valid any longer).

	* screen.c (panel_key): Cleanup: deleted if-clause with -1 (EV_NONE)
	which isn't delivered to widgets by the dialog manager; always
	return 1 when key was handled; removed the function keys from the
	panel's keymap (the function keys are always handled by the
	buttonbar); don't eat characters below ' ' (C-l and Shift-F3 now
	work even when quick search was started); characters between 32 and
	255 start quick search if there is no commandline (no C-s necessary
	to start search).

	* tree.c (tree_key): likewise
1998-03-02 18:09:16 +00:00

2812 lines
65 KiB
C
Raw Blame History

/* Virtual File System: FTP file system.
Copyright (C) 1995 The Free Software Foundation
Written by: 1995 Ching Hui
1995 Jakub Jelinek
1995, 1996, 1997 Miguel de Icaza
1997 Norbert Warmuth
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. */
/* FTPfs TODO:
- make it more robust - all the connects etc. should handle EADDRINUSE and
ERETRY (have I spelled these names correctly?)
- make the user able to flush a connection - all the caches will get empty
etc., (tarfs as well), we should give there a user selectable timeout
and assign a key sequence.
- use hash table instead of linklist to cache ftpfs directory.
- complete rename operation.
*/
#include <config.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/types.h>
#include <stdarg.h>
#include <fcntl.h>
#include <pwd.h>
#include <ctype.h> /* For isdigit */
#ifdef SCO_FLAVOR
# include <sys/timeb.h> /* alex: for struct timeb definition */
#endif /* SCO_FLAVOR */
#include <time.h>
#include <sys/types.h>
#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif
#if HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#include "../src/fs.h"
#include "../src/mad.h"
#include "../src/setup.h"
#include "../src/tty.h" /* enable/disable interrupt key */
#include <netdb.h> /* struct hostent */
#include <sys/socket.h> /* AF_INET */
#include <netinet/in.h> /* struct in_addr */
#ifdef HAVE_SETSOCKOPT
# include <netinet/ip.h> /* IP options */
#endif
#include <arpa/inet.h>
#include <arpa/ftp.h>
#include <arpa/telnet.h>
#ifndef SCO_FLAVOR
# include <sys/time.h> /* alex: this redefines struct timeval */
#endif /* SCO_FLAVOR */
#include <sys/param.h>
#ifdef USE_TERMNET
#include <termnet.h>
#endif
#include "../src/mem.h"
#define WANT_PARSE_LS_LGA
#include "vfs.h"
#include "tcputil.h"
#include "../src/util.h"
#include "../src/dialog.h"
#include "container.h"
#include "ftpfs.h"
#ifndef MAXHOSTNAMELEN
# define MAXHOSTNAMELEN 64
#endif
#define UPLOAD_ZERO_LENGTH_FILE
void print_vfs_message(char *, ...);
static int ftpfserrno;
static int code;
/* Delay to retry a connection */
int ftpfs_retry_seconds = 30;
/* Method to use to connect to ftp sites */
int ftpfs_use_passive_connections = 1;
/* Use the ~/.netrc */
int use_netrc = 1;
extern char *home_dir;
/* Anonymous setup */
char *ftpfs_anonymous_passwd;
int ftpfs_directory_timeout;
/* Proxy host */
char *ftpfs_proxy_host = 0;
/* Reget flag */
int do_reget = 0;
/* wether we have to use proxy by default? */
int ftpfs_always_use_proxy;
/* source routing host */
extern int source_route;
/* If set, then log dialog between server and client */
static int ftpfs_debug_server_dialog = 0;
/* Where we store the transactions */
static FILE *ftpfs_logfile;
/* If true, the directory cache is forced to reload */
static int force_expiration = 0;
struct linklist *ftpfs_connections_list;
extern char *last_current_dir;
/* command wait_flag: */
#define NONE 0x00
#define WAIT_REPLY 0x01
#define WANT_STRING 0x02
char reply_str [80];
static char *ftpfs_get_current_directory(struct ftpfs_connection *bucket);
static int __ftpfs_chdir (struct ftpfs_connection *bucket ,char *remote_path);
/* Extract the hostname and username from the path */
/* path is in the form: [user@]hostname:port/remote-dir, e.g.:
* ftp://sunsite.unc.edu/pub/linux
* ftp://miguel@sphinx.nuclecu.unam.mx/c/nc
* ftp://tsx-11.mit.edu:8192/
* ftp://joe@foo.edu:11321/private
* If the user is empty, e.g. ftp://@roxanne/private, then your login name
* is supplied.
* */
char *ftpfs_get_host_and_username (char *path, char **host, char **user, int *port, char **pass)
{
return get_host_and_username (path, host, user, port, 21, 1, pass);
}
static int
select_on_two (int fd1, int fd2)
{
fd_set set;
struct timeval timeout;
int v;
int maxfd = (fd1 > fd2 ? fd1 : fd2) + 1;
timeout.tv_sec = 1;
timeout.tv_usec = 0;
FD_ZERO(&set);
FD_SET(fd1, &set);
FD_SET(fd2, &set);
v = select (maxfd, &set, 0, 0, &timeout);
if (v <= 0)
return v;
if (FD_ISSET (fd1, &set))
return 1;
if (FD_ISSET (fd2, &set))
return 2;
return -1;
}
static int
get_line (int sock, char *buf, int buf_len)
{
int i, status;
char c;
for (i = 0; i < buf_len; i++, buf++) {
if (read(sock, buf, sizeof(char)) <= 0)
return 0;
if (ftpfs_debug_server_dialog){
fwrite (buf, 1, 1, ftpfs_logfile);
fflush (ftpfs_logfile);
}
if (*buf == '\n') {
*buf = 0;
return 1;
}
}
*buf = 0;
while ((status = read(sock, &c, sizeof(c))) > 0){
if (ftpfs_debug_server_dialog){
fwrite (&c, 1, 1, ftpfs_logfile);
fflush (ftpfs_logfile);
}
if (c == '\n')
return 1;
}
return 0;
}
/* Returns a reply code, check /usr/include/arpa/ftp.h for possible values */
int getreply (int sock, char *string_buf, int string_len)
{
char answer[1024];
int i;
for (;;) {
if (!get_line(sock, answer, sizeof(answer))) {
if (string_buf)
*string_buf = 0;
code = 421;
return 4;
}
switch(sscanf(answer, "%d", &code)) {
case 0:
if (string_buf) {
strncpy(string_buf, answer, string_len - 1);
*(string_buf + string_len - 1) = 0;
}
code = 500;
return 5;
case 1:
if (answer[3] == '-') {
while (1) {
if (!get_line(sock, answer, sizeof(answer))) {
if (string_buf)
*string_buf = 0;
code = 421;
return 4;
}
if ((sscanf(answer, "%d", &i) > 0) &&
(code == i) && (answer[3] == ' '))
break;
}
}
if (string_buf) {
strncpy(string_buf, answer, string_len - 1);
*(string_buf + string_len - 1) = 0;
}
return code / 100;
}
}
}
static void
ftpentry_destructor (void *data)
{
struct ftpentry *fe = data;
fe->count--;
if ((fe->tmp_reget == 1 && fe->local_filename)){
unlink (fe->local_filename);
fe->tmp_reget = 0;
}
if (fe->count > 0)
return;
free(fe->name);
if (fe->linkname)
free(fe->linkname);
if (fe->local_filename) {
if (fe->local_is_temp) {
if (!fe->local_stat.st_mtime)
unlink(fe->local_filename);
else {
struct stat sb;
if (stat (fe->local_filename, &sb) >=0 &&
fe->local_stat.st_mtime == sb.st_mtime)
unlink (fe->local_filename); /* Delete only if it hasn't changed */
}
}
free(fe->local_filename);
fe->local_filename = 0;
}
if (fe->remote_filename)
free(fe->remote_filename);
if (fe->l_stat)
free(fe->l_stat);
free(fe);
}
static void
ftpfs_dir_destructor(void *data)
{
struct ftpfs_dir *fd = data;
fd->count--;
if (fd->count > 0)
return;
free(fd->remote_path);
linklist_destroy(fd->file_list, ftpentry_destructor);
free(fd);
}
static int command (struct ftpfs_connection *bucket, int wait_reply,
char *fmt, ...)
{
va_list ap;
char buf[2048]; /* FIXME: buffer exceed ?? */
int n, status;
int sock = qsock (bucket);
va_start (ap, fmt);
vsprintf (buf, fmt, ap);
va_end (ap);
n = strlen(buf);
buf[n++] = '\r';
buf[n++] = '\n';
buf[n] = 0;
if (ftpfs_debug_server_dialog){
if (strncmp (buf, "PASS ", 5) == 0) {
char *tmp = "PASS <Password not logged>\r\n";
fwrite (tmp, strlen (tmp), 1, ftpfs_logfile);
} else
fwrite (buf, strlen (buf), 1, ftpfs_logfile);
fflush (ftpfs_logfile);
}
got_sigpipe = 0;
enable_interrupt_key();
status = write(sock, buf, strlen(buf));
if (status < 0){
code = 421;
if (errno == EPIPE){
got_sigpipe = 1;
}
disable_interrupt_key();
return TRANSIENT;
}
disable_interrupt_key();
if (wait_reply)
return getreply (sock, (wait_reply & WANT_STRING) ? reply_str : NULL, sizeof (reply_str)-1);
return COMPLETE;
}
static void
ftpfs_connection_close (void *data)
{
struct ftpfs_connection *bucket = data;
if (qsock (bucket) != -1){
print_vfs_message ("ftpfs: Disconnecting from %s", qhost(bucket));
command(bucket, NONE, "QUIT");
close(qsock(bucket));
}
}
static void
ftpfs_free_bucket (void *data)
{
struct ftpfs_connection *bucket = data;
free(qhost(bucket));
free(quser(bucket));
if (qcdir(bucket))
free(qcdir(bucket));
if (qhome(bucket))
free(qhome(bucket));
if (qupdir(bucket))
free(qupdir(bucket));
if (bucket->password)
wipe_password (bucket->password);
linklist_destroy(qdcache(bucket), ftpfs_dir_destructor);
free(bucket);
}
static void
ftpfs_connection_destructor(void *data)
{
ftpfs_connection_close (data);
ftpfs_free_bucket (data);
}
/* some defines only used by changetype */
/* These two are valid values for the second parameter */
#define TYPE_ASCII 0
#define TYPE_BINARY 1
/* This one is only used to initialize bucket->isbinary, don't use it as
second parameter to changetype. */
#define TYPE_UNKNOWN -1
static int
changetype (struct ftpfs_connection *bucket, int binary)
{
if (binary != bucket->isbinary) {
if (command (bucket, WAIT_REPLY, "TYPE %c", binary ? 'I' : 'A') != COMPLETE) {
ftpfserrno = EIO;
return -1;
}
bucket->isbinary = binary;
}
return binary;
}
inline void
flush_all_directory(struct ftpfs_connection *bucket)
{
linklist_delete_all(qdcache(bucket), ftpfs_dir_destructor);
}
/* This routine logs the user in */
static int
login_server (struct ftpfs_connection *bucket, char *netrcpass)
{
#if defined(HSC_PROXY)
char *proxypass, *proxyname;
#endif
char *pass;
char *op;
char *name; /* login user name */
int anon = 0;
bucket->isbinary = TYPE_UNKNOWN;
if (netrcpass)
op = strdup (netrcpass);
else {
if (!strcmp (quser(bucket), "anonymous") ||
!strcmp (quser(bucket), "ftp")) {
op = strdup(ftpfs_anonymous_passwd);
anon = 1;
} else {
char *p;
if (!bucket->password){
p = copy_strings (" FTP: Password required for ", quser(bucket),
" ", NULL);
op = input_dialog (p, "Password:", "");
free (p);
if (op == NULL) {
ftpfserrno = EPERM;
return 0;
}
bucket->password = strdup (op);
} else
op = strdup (bucket->password);
}
}
if (!anon || ftpfs_debug_server_dialog)
pass = strdup (op);
else
pass = copy_strings ("-", op, 0);
wipe_password (op);
/* Proxy server accepts: username@host-we-want-to-connect*/
if (qproxy (bucket)){
#if defined(HSC_PROXY)
char *p, *host;
int port;
p = ftpfs_get_host_and_username(ftpfs_proxy_host, &host, &proxyname,
&port, &proxypass);
if (p)
free (p);
free(host);
if (proxypass)
wipe_password (proxypass);
p = copy_strings(" Proxy: Password required for ", proxyname, " ",
NULL);
proxypass = input_dialog (p, "Password:", "");
free(p);
if (proxypass == NULL) {
ftpfserrno = EPERM;
wipe_password (pass);
free (proxyname);
return 0;
}
name = strdup(quser (bucket));
#else
name = copy_strings (quser(bucket), "@",
qhost(bucket)[0] == '!' ? qhost(bucket)+1 : qhost(bucket), 0);
#endif
} else
name = strdup (quser (bucket));
if (getreply (qsock(bucket), NULL, 0) == COMPLETE) {
#if defined(HSC_PROXY)
if (qproxy(bucket)) {
print_vfs_message("ftpfs: sending proxy login name");
if (command (bucket, 1, "USER %s", proxyname) == CONTINUE) {
print_vfs_message("ftpfs: sending proxy user password");
if (command (bucket, 1, "PASS %s", proxypass) == COMPLETE)
{
print_vfs_message("ftpfs: proxy authentication succeeded");
if (command (bucket, 1, "SITE %s", qhost(bucket)+1) ==
COMPLETE) {
print_vfs_message("ftpfs: connected to %s", qhost(bucket)+1);
}
else {
bucket->failed_on_login = 1;
/* ftpfserrno = E; */
if (proxypass)
wipe_password (proxypass);
wipe_password (pass);
free (proxyname);
free (name);
return 0;
}
}
else {
bucket->failed_on_login = 1;
/* ftpfserrno = E; */
if (proxypass)
wipe_password (proxypass);
wipe_password (pass);
free (proxyname);
free (name);
return 0;
}
}
else {
bucket->failed_on_login = 1;
/* ftpfserrno = E; */
if (proxypass)
wipe_password (proxypass);
wipe_password (pass);
free (proxyname);
free (name);
return 0;
}
if (proxypass)
wipe_password (proxypass);
free (proxyname);
}
#endif
print_vfs_message("ftpfs: sending login name");
code = command (bucket, WAIT_REPLY, "USER %s", name);
switch (code){
case CONTINUE:
print_vfs_message("ftpfs: sending user password");
if (command (bucket, WAIT_REPLY, "PASS %s", pass) != COMPLETE)
break;
case COMPLETE:
print_vfs_message("ftpfs: logged in");
wipe_password (pass);
free (name);
return 1;
default:
bucket->failed_on_login = 1;
/* ftpfserrno = E; */
if (bucket->password)
wipe_password (bucket->password);
bucket->password = 0;
/* This matches the end of the code below, just to make it
* obvious to the optimizer
*/
wipe_password (pass);
free (name);
return 0;
}
}
print_vfs_message ("ftpfs: Login incorrect for user %s ", quser(bucket));
ftpfserrno = EPERM;
wipe_password (pass);
free (name);
return 0;
}
#ifdef HAVE_SETSOCKOPT
static void
setup_source_route (int socket, int dest)
{
char buffer [20];
char *ptr = buffer;
if (!source_route)
return;
bzero (buffer, sizeof (buffer));
*ptr++ = IPOPT_LSRR;
*ptr++ = 3 + 8;
*ptr++ = 4; /* pointer */
/* First hop */
bcopy ((char *) &source_route, ptr, sizeof (int));
ptr += 4;
/* Second hop (ie, final destination) */
bcopy ((char *) &dest, ptr, sizeof (int));
ptr += 4;
while ((ptr - buffer) & 3)
ptr++;
if (setsockopt (socket, IPPROTO_IP, IP_OPTIONS,
buffer, ptr - buffer) < 0)
message_2s (1, " Error ", " Could not set source routing (%s)", unix_error_string (errno));
}
#else
#define setup_source_route(x,y)
#endif
static struct no_proxy_entry {
char *domain;
void *next;
} *no_proxy;
static void
load_no_proxy_list ()
{
/* FixMe: shouldn't be hardcoded!!! */
char s[258]; /* provide for 256 characters and nl */
struct no_proxy_entry *np, *current;
FILE *npf;
int c;
char *p;
static int loaded;
if (loaded)
return;
if (exist_file (LIBDIR "mc.no_proxy") &&
(npf = fopen (LIBDIR "mc.no_proxy", "r"))) {
while (fgets (s, 258, npf) || !(feof (npf) || ferror (npf))) {
if (!(p = strchr (s, '\n'))) { /* skip bogus entries */
while ((c = getc (npf)) != EOF && c != '\n')
;
continue;
}
if (p == s)
continue;
*p = '\0';
p = xmalloc (strlen (s), "load_no_proxy_list:1");
np = xmalloc (sizeof (*np), "load_no_proxy_list:2");
strcpy (p, s);
np->domain = p;
np->next = 0;
if (no_proxy)
current->next = np;
else
no_proxy = np;
current = np;
}
fclose (npf);
loaded = 1;
}
}
static int
ftpfs_check_proxy (char *host)
{
struct no_proxy_entry *npe;
if (!ftpfs_proxy_host || !*ftpfs_proxy_host || !host || !*host)
return 0; /* sanity check */
if (*host == '!')
return 1;
if (!ftpfs_always_use_proxy)
return 0;
if (!strchr (host, '.'))
return 0;
load_no_proxy_list ();
for (npe = no_proxy; npe; npe=npe->next) {
char *domain = npe->domain;
if (domain[0] == '.') {
int ld = strlen (domain);
int lh = strlen (host);
while (ld && lh && host[lh - 1] == domain[ld - 1]) {
ld--;
lh--;
}
if (!ld)
return 0;
} else
if (!strcasecmp (host, domain))
return 0;
}
return 1;
}
static void
ftpfs_get_proxy_host_and_port (char *proxy, char **host, int *port)
{
char *user, *pass, *dir;
#if defined(HSC_PROXY)
#define HSC_DEFAULT_PORT 9875
dir = get_host_and_username(proxy, host, &user, port, HSC_DEFAULT_PORT, 1,
&pass);
#else
dir = get_host_and_username(proxy, host, &user, port, 21, 1,
&pass);
#endif
free(user);
if (pass)
wipe_password (pass);
if (dir)
free(dir);
}
static int
ftpfs_open_socket(struct ftpfs_connection *bucket)
{
struct sockaddr_in server_address;
struct hostent *hp;
int my_socket;
char *host;
int port;
int free_host = 0;
/* Use a proxy host? */
host = qhost(bucket);
if (!host || !*host){
print_vfs_message ("ftpfs: Invalid host name.");
ftpfserrno = EINVAL;
return -1;
}
/* Hosts to connect to that start with a ! should use proxy */
if (qproxy(bucket)) {
ftpfs_get_proxy_host_and_port (ftpfs_proxy_host, &host, &port);
free_host = 1;
}
/* Get host address */
bzero ((char *) &server_address, sizeof (server_address));
server_address.sin_family = AF_INET;
server_address.sin_addr.s_addr = inet_addr (host);
if (server_address.sin_addr.s_addr != -1)
server_address.sin_family = AF_INET;
else {
hp = gethostbyname(host);
if (hp == NULL){
print_vfs_message("ftpfs: Invalid host address.");
ftpfserrno = EINVAL;
if (free_host)
free (host);
return -1;
}
server_address.sin_family = hp->h_addrtype;
bcopy ((char *) hp->h_addr, (char *) &server_address.sin_addr,
hp->h_length);
}
#define THE_PORT qproxy(bucket) ? port : qport (bucket)
server_address.sin_port = htons (THE_PORT);
/* Connect */
if ((my_socket = socket (AF_INET, SOCK_STREAM, 0)) < 0) {
ftpfserrno = errno;
if (free_host)
free (host);
return -1;
}
setup_source_route (my_socket, server_address.sin_addr.s_addr);
print_vfs_message("ftpfs: making connection to %s", host);
if (free_host)
free (host);
enable_interrupt_key(); /* clear the interrupt flag */
if (connect (my_socket, (struct sockaddr *) &server_address,
sizeof (server_address)) < 0){
ftpfserrno = errno;
if (errno == EINTR && got_interrupt())
print_vfs_message("ftpfs: connection interrupted by user");
else
print_vfs_message("ftpfs: connection to server failed: %s",
unix_error_string(errno));
disable_interrupt_key();
close (my_socket);
return -1;
}
disable_interrupt_key();
return my_socket;
}
static struct ftpfs_connection *
open_command_connection (char *host, char *user, int port, char *netrcpass)
{
struct ftpfs_connection *bucket;
int retry_seconds, count_down;
bucket = xmalloc(sizeof(struct ftpfs_connection),
"struct ftpfs_connection");
if (bucket == NULL) {
ftpfserrno = ENOMEM;
return NULL;
}
#ifdef HAVE_MAD
{
extern void *watch_free_pointer;
if (!watch_free_pointer)
watch_free_pointer = host;
}
#endif
qhost(bucket) = strdup (host);
quser(bucket) = strdup (user);
qcdir(bucket) = NULL;
qport(bucket) = port;
qlock(bucket) = 0;
qhome(bucket) = NULL;
qproxy(bucket)= 0;
qupdir(bucket)= 0;
qdcache(bucket)=0;
bucket->__inode_counter = 0;
bucket->lock = 0;
bucket->use_proxy = ftpfs_check_proxy (host);
bucket->password = 0;
bucket->use_passive_connection = ftpfs_use_passive_connections | source_route;
bucket->use_source_route = source_route;
bucket->isbinary = TYPE_UNKNOWN;
/* We do not want to use the passive if we are using proxies */
if (bucket->use_proxy)
bucket->use_passive_connection = 0;
if ((qdcache(bucket) = linklist_init()) == NULL) {
ftpfserrno = ENOMEM;
free (qhost(bucket));
free (quser(bucket));
free (bucket);
return NULL;
}
retry_seconds = 0;
do {
bucket->failed_on_login = 0;
qsock(bucket) = ftpfs_open_socket(bucket);
if (qsock(bucket) == -1) {
ftpfs_free_bucket (bucket);
return NULL;
}
if (login_server(bucket, netrcpass)) {
/* Logged in, no need to retry the connection */
break;
} else {
if (bucket->failed_on_login){
/* Close only the socket descriptor */
close (qsock (bucket));
} else {
ftpfs_connection_destructor (bucket);
return NULL;
}
if (ftpfs_retry_seconds){
retry_seconds = ftpfs_retry_seconds;
enable_interrupt_key ();
for (count_down = retry_seconds; count_down; count_down--){
print_vfs_message ("Waiting to retry... %d (Control-C to cancel)\n", count_down);
sleep (1);
if (got_interrupt ()){
/* ftpfserrno = E; */
disable_interrupt_key ();
ftpfs_free_bucket (bucket);
return NULL;
}
}
disable_interrupt_key ();
}
}
} while (retry_seconds);
qhome(bucket) = ftpfs_get_current_directory (bucket);
if (!qhome(bucket))
qhome(bucket) = strdup ("/");
if (last_current_dir) {
if (last_current_dir [strlen (last_current_dir) - 1] == '/')
qupdir(bucket) = strdup (last_current_dir);
else
qupdir(bucket) = copy_strings (last_current_dir, "/", NULL);
} else
qupdir(bucket) = strdup ("/");
return bucket;
}
static int
is_connection_closed(struct ftpfs_connection *bucket)
{
fd_set rset;
struct timeval t;
if (got_sigpipe){
return 1;
}
t.tv_sec = 0;
t.tv_usec = 0;
FD_ZERO(&rset);
FD_SET(qsock(bucket), &rset);
while (1) {
if (select(qsock(bucket) + 1, &rset, NULL, NULL, &t) < 0)
if (errno != EINTR)
return 1;
return 0;
#if 0
if (FD_ISSET(qsock(bucket), &rset)) {
n = read(qsock(bucket), &read_ahead, sizeof(read_ahead));
if (n <= 0)
return 1;
} else
#endif
}
}
/* This routine keeps track of open connections */
/* Returns a connected socket to host */
static struct ftpfs_connection *
ftpfs_open_link (char *host, char *user, int port, char *netrcpass)
{
int sock;
struct ftpfs_connection *bucket;
struct linklist *lptr;
for (lptr = ftpfs_connections_list->next;
lptr != ftpfs_connections_list; lptr = lptr->next) {
bucket = lptr->data;
if ((strcmp (host, qhost(bucket)) == 0) &&
(strcmp (user, quser(bucket)) == 0) &&
(port == qport(bucket))) {
/* check the connection is closed or not, just hack */
if (is_connection_closed(bucket)) {
flush_all_directory(bucket);
sock = ftpfs_open_socket(bucket);
if (sock != -1) {
close(qsock(bucket));
qsock(bucket) = sock;
if (login_server(bucket, netrcpass))
return bucket;
}
/* connection refused */
lptr->prev->next = lptr->next;
lptr->next->prev = lptr->prev;
ftpfs_connection_destructor(bucket);
return NULL;
}
return bucket;
}
}
bucket = open_command_connection(host, user, port, netrcpass);
if (bucket == NULL)
return NULL;
if (!linklist_insert(ftpfs_connections_list, bucket)) {
ftpfserrno = ENOMEM;
ftpfs_connection_destructor(bucket);
return NULL;
}
return bucket;
}
/* The returned directory should always contain a trailing slash */
static char *ftpfs_get_current_directory(struct ftpfs_connection *bucket)
{
char buf[4096], *bufp, *bufq;
if (command(bucket, NONE, "PWD") == COMPLETE &&
getreply(qsock(bucket), buf, sizeof(buf)) == COMPLETE) {
bufp = NULL;
for (bufq = buf; *bufq; bufq++)
if (*bufq == '"') {
if (!bufp) {
bufp = bufq + 1;
} else {
*bufq = 0;
if (*bufp) {
if (*(bufq - 1) != '/') {
*bufq++ = '/';
*bufq = 0;
}
return strdup (bufp);
} else {
ftpfserrno = EIO;
return NULL;
}
}
}
}
ftpfserrno = EIO;
return NULL;
}
void ftpfs_fill_names (void (*func)(char *))
{
struct linklist *lptr;
char *path_name;
struct ftpfs_connection *bucket;
if (!ftpfs_connections_list)
return;
lptr = ftpfs_connections_list;
do {
if ((bucket = lptr->data) != 0){
path_name = copy_strings ("ftp://", quser (bucket),
"@", qhost (bucket),
qcdir(bucket), 0);
(*func)(path_name);
free (path_name);
}
lptr = lptr->next;
} while (lptr != ftpfs_connections_list);
}
/* Setup Passive ftp connection, we use it for source routed connections */
static int
setup_passive (int my_socket, struct ftpfs_connection *bucket, struct sockaddr_in *sa)
{
int xa, xb, xc, xd, xe, xf;
char n [6];
char *c = reply_str;
if (command (bucket, WAIT_REPLY | WANT_STRING, "PASV") != COMPLETE)
return 0;
/* Parse remote parameters */
for (c = reply_str + 4; (*c) && (!isdigit (*c)); c++)
;
if (!*c)
return 0;
if (!isdigit (*c))
return 0;
if (sscanf (c, "%d,%d,%d,%d,%d,%d", &xa, &xb, &xc, &xd, &xe, &xf) != 6)
return 0;
n [0] = (unsigned char) xa;
n [1] = (unsigned char) xb;
n [2] = (unsigned char) xc;
n [3] = (unsigned char) xd;
n [4] = (unsigned char) xe;
n [5] = (unsigned char) xf;
bcopy ((void *)n, &(sa->sin_addr.s_addr), 4);
bcopy ((void *)&n[4], &(sa->sin_port), 2);
setup_source_route (my_socket, sa->sin_addr.s_addr);
if (connect (my_socket, (struct sockaddr *) sa, sizeof (struct sockaddr_in)) < 0)
return 0;
return 1;
}
static int
initconn (struct ftpfs_connection *bucket)
{
struct sockaddr_in data_addr;
int data, len = sizeof(data_addr);
struct protoent *pe;
getsockname(qsock(bucket), (struct sockaddr *) &data_addr, &len);
data_addr.sin_port = 0;
pe = getprotobyname("tcp");
if (pe == NULL) {
ftpfserrno = EIO;
return -1;
}
data = socket (AF_INET, SOCK_STREAM, pe->p_proto);
if (data < 0) {
ftpfserrno = EIO;
return -1;
}
#ifdef ORIGINAL_CONNECT_CODE
if (bucket->use_source_route){
int c;
if ((c = setup_passive (data, bucket, &data_addr)))
return data;
print_vfs_message("ftpfs: could not setup passive mode for source routing");
bucket->use_source_route = 0;
}
#else
if (bucket->use_passive_connection){
if ((bucket->use_passive_connection = setup_passive (data, bucket, &data_addr)))
return data;
bucket->use_source_route = 0;
bucket->use_passive_connection = 0;
print_vfs_message ("ftpfs: could not setup passive mode");
}
#endif
/* If passive setup fails, fallback to active connections */
/* Active FTP connection */
if (bind (data, (struct sockaddr *)&data_addr, len) < 0)
goto error_return;
getsockname(data, (struct sockaddr *) &data_addr, &len);
if (listen (data, 1) < 0)
goto error_return;
{
unsigned char *a = (unsigned char *)&data_addr.sin_addr;
unsigned char *p = (unsigned char *)&data_addr.sin_port;
if (command (bucket, WAIT_REPLY, "PORT %d,%d,%d,%d,%d,%d", a[0], a[1],
a[2], a[3], p[0], p[1]) != COMPLETE)
goto error_return;
}
return data;
error_return:
close(data);
ftpfserrno = EIO;
return -1;
}
static int
open_data_connection (struct ftpfs_connection *bucket, char *cmd, char *remote,
int isbinary)
{
struct sockaddr_in from;
int s, j, data, fromlen = sizeof(from);
if ((s = initconn (bucket)) == -1)
return -1;
if (changetype (bucket, isbinary) == -1)
return -1;
if (do_reget > 0){
j = command (bucket, WAIT_REPLY, "REST %d", do_reget);
do_reget = 0;
if (j != CONTINUE)
return -1;
}
if (remote)
j = command (bucket, WAIT_REPLY, "%s %s", cmd, remote);
else
j = command (bucket, WAIT_REPLY, "%s", cmd);
if (j != PRELIM) {
ftpfserrno = EPERM;
return -1;
}
enable_interrupt_key();
if (bucket->use_passive_connection)
data = s;
else {
data = accept (s, (struct sockaddr *)&from, &fromlen);
if (data < 0) {
ftpfserrno = errno;
close(s);
return -1;
}
close(s);
}
disable_interrupt_key();
return data;
}
/* ftpfs_get_path:
* makes BUCKET point to the connection bucket descriptor for PATH
* returns a malloced string with the pathname relative to BUCKET.
*/
static char*
ftpfs_get_path (struct ftpfs_connection **bucket, char *path)
{
char *user, *host, *remote_path, *pass;
int port;
/* An absolute path name, try to determine connection socket */
if (strncmp (path, "ftp://", 6) == 0){
path += 6;
if (!(remote_path = ftpfs_get_host_and_username (path, &host, &user,
&port, &pass))) {
ftpfserrno = ENOENT;
free (host);
free (user);
if (pass)
wipe_password (pass);
return NULL;
}
if ((*bucket = ftpfs_open_link (host, user, port, pass)) == NULL) {
free (remote_path);
free (host);
free (user);
if (pass)
wipe_password (pass);
return NULL;
}
free (host);
free (user);
if (pass)
wipe_password (pass);
return remote_path;
}
/* never get here !!! */
message_1s(1, " Error ", " Oops, you just hit a bug in the code ");
return NULL;
}
static void
ftpfs_abort (struct ftpfs_connection *bucket, int dsock)
{
static unsigned char ipbuf[3] = { IAC, IP, IAC };
fd_set mask;
char buf[1024];
print_vfs_message("ftpfs: aborting transfer.");
if (send(qsock(bucket), ipbuf, sizeof(ipbuf), MSG_OOB) != sizeof(ipbuf)) {
print_vfs_message("ftpfs: abort error: %s", unix_error_string(errno));
return;
}
if (command(bucket, NONE, "%cABOR", DM) != COMPLETE){
print_vfs_message ("ftpfs: abort failed");
return;
}
if (dsock != -1) {
FD_ZERO(&mask);
FD_SET(dsock, &mask);
if (select(dsock + 1, &mask, NULL, NULL, NULL) > 0)
while (read(dsock, buf, sizeof(buf)) > 0);
}
if ((getreply(qsock(bucket), NULL, 0) == TRANSIENT) && (code == 426))
getreply(qsock(bucket), NULL, 0);
}
static void
resolve_symlink(struct ftpfs_connection *bucket, struct ftpfs_dir *dir)
{
char buffer[2048] = "", *filename;
int sock;
FILE *fp;
struct stat s;
struct linklist *flist;
struct ftpentry *fe;
print_vfs_message("Resolving symlink...");
if (strchr (dir->remote_path, ' ')) {
if (__ftpfs_chdir(bucket, dir->remote_path) != COMPLETE) {
print_vfs_message("ftpfs: CWD failed.");
return;
}
sock = open_data_connection (bucket, "LIST -lLa", ".", TYPE_ASCII);
}
else
sock = open_data_connection (bucket, "LIST -lLa",
dir->remote_path, TYPE_ASCII);
if (sock == -1) {
print_vfs_message("ftpfs: couldn't resolve symlink");
return;
}
fp = fdopen(sock, "r");
if (fp == NULL) {
close(sock);
print_vfs_message("ftpfs: couldn't resolve symlink");
return;
}
enable_interrupt_key();
flist = dir->file_list->next;
while (1) {
do {
if (flist == dir->file_list)
goto done;
fe = flist->data;
flist = flist->next;
} while (!S_ISLNK(fe->s.st_mode));
while (1) {
if (fgets (buffer, sizeof (buffer), fp) == NULL)
goto done;
if (parse_ls_lga (buffer, &s, &filename, NULL)) {
int r = strcmp(fe->name, filename);
free(filename);
if (r == 0) {
fe->l_stat = xmalloc(sizeof(struct stat),
"resolve_symlink: struct stat");
if (fe->l_stat == NULL)
goto done;
*fe->l_stat = s;
(*fe->l_stat).st_ino = bucket->__inode_counter++;
break;
}
if (r < 0)
break;
}
}
}
done:
while (fgets(buffer, sizeof(buffer), fp) != NULL);
disable_interrupt_key();
fclose(fp);
getreply(qsock(bucket), NULL, 0);
}
static int
get_line_interruptible (char *buffer, int size, int fd)
{
int n;
int i = 0;
for (i = 0; i < size-1; i++) {
n = read (fd, buffer+i, 1);
if (n == -1 && errno == EINTR){
buffer [i] = 0;
return EINTR;
}
if (n == 0){
buffer [i] = 0;
return 0;
}
if (buffer [i] == '\n'){
buffer [i] = 0;
return 1;
}
}
buffer [size-1] = 0;
return 0;
}
/* Return true if path is the same directoy as the one we are on now */
static int
ftpfs_same_dir (char *path, struct ftpfs_connection *bucket)
{
if (!qcdir (bucket))
return 0;
if (strcmp (path, qcdir (bucket)) == 0)
return 1;
return 0;
}
static struct ftpfs_dir *
retrieve_dir(struct ftpfs_connection *bucket, char *remote_path)
{
#ifdef OLD_READ
FILE *fp;
#endif
int sock, has_symlinks;
struct linklist *file_list, *p;
struct ftpentry *fe;
char buffer[8192];
struct ftpfs_dir *dcache;
int got_intr = 0;
int has_spaces = (strchr (remote_path, ' ') != NULL);
for (p = qdcache(bucket)->next;p != qdcache(bucket);
p = p->next) {
dcache = p->data;
if (strcmp(dcache->remote_path, remote_path) == 0) {
struct timeval tim;
gettimeofday(&tim, NULL);
if ((tim.tv_sec < dcache->timestamp.tv_sec) && !force_expiration)
return dcache;
else {
force_expiration = 0;
p->next->prev = p->prev;
p->prev->next = p->next;
ftpfs_dir_destructor(dcache);
free (p);
break;
}
}
}
has_symlinks = 0;
print_vfs_message("ftpfs: Reading FTP directory...");
if (has_spaces)
if (__ftpfs_chdir(bucket, remote_path) != COMPLETE) {
ftpfserrno = ENOENT;
print_vfs_message("ftpfs: CWD failed.");
return NULL;
}
file_list = linklist_init();
if (file_list == NULL) {
ftpfserrno = ENOMEM;
print_vfs_message("ftpfs: couldn't get a file listing");
return NULL;
}
dcache = xmalloc(sizeof(struct ftpfs_dir),
"struct ftpfs_dir");
if (dcache == NULL) {
ftpfserrno = ENOMEM;
linklist_destroy(file_list, NULL);
print_vfs_message("ftpfs: FAIL");
return NULL;
}
gettimeofday(&dcache->timestamp, NULL);
dcache->timestamp.tv_sec += ftpfs_directory_timeout;
dcache->file_list = file_list;
dcache->remote_path = strdup(remote_path);
dcache->count = 1;
if (has_spaces)
sock = open_data_connection (bucket, "LIST -la", ".", TYPE_ASCII);
else {
char *path = copy_strings (remote_path, PATH_SEP_STR, ".", (char *) 0);
sock = open_data_connection (bucket, "LIST -la", path, TYPE_ASCII);
free (path);
}
if (sock == -1)
goto error_3;
#ifdef OLD_READ
#define close_this_sock(x,y) fclose (x)
fp = fdopen(sock, "r");
if (fp == NULL) {
ftpfserrno = errno;
close(sock);
goto error_2;
}
#else
#define close_this_sock(x,y) close (y)
#endif
/* Clear the interrupt flag */
enable_interrupt_key ();
errno = 0;
#ifdef OLD_READ
while (fgets (buffer, sizeof (buffer), fp) != NULL) {
if (got_intr = got_interrupt ())
break;
#else
while ((got_intr = get_line_interruptible (buffer, sizeof (buffer), sock)) != EINTR){
#endif
int eof = got_intr == 0;
if (ftpfs_debug_server_dialog){
fputs (buffer, ftpfs_logfile);
fflush (ftpfs_logfile);
}
if (buffer [0] == 0 && eof)
break;
fe = xmalloc(sizeof(struct ftpentry), "struct ftpentry");
fe->freshly_created = 0;
fe->tmp_reget = 0;
if (fe == NULL) {
ftpfserrno = ENOMEM;
goto error_1;
}
if (parse_ls_lga (buffer, &fe->s, &fe->name, &fe->linkname)) {
fe->count = 1;
fe->local_filename = fe->remote_filename = NULL;
fe->l_stat = NULL;
fe->bucket = bucket;
(fe->s).st_ino = bucket->__inode_counter++;
if (S_ISLNK(fe->s.st_mode))
has_symlinks = 1;
if (!linklist_insert(file_list, fe)) {
free(fe);
ftpfserrno = ENOMEM;
goto error_1;
}
}
else
free(fe);
if (eof)
break;
}
if (got_intr){
disable_interrupt_key();
print_vfs_message("ftpfs: reading FTP directory interrupt by user");
#ifdef OLD_READ
ftpfs_abort(bucket, fileno(fp));
#else
ftpfs_abort(bucket, sock);
#endif
close_this_sock(fp, sock);
ftpfserrno = EINTR;
goto error_3;
}
close_this_sock(fp, sock);
disable_interrupt_key();
if (getreply (qsock (bucket), NULL, 0) != COMPLETE) {
ftpfserrno = EIO;
goto error_3;
}
if (file_list->next == file_list) {
ftpfserrno = EACCES;
goto error_3;
}
if (!linklist_insert(qdcache(bucket), dcache)) {
ftpfserrno = ENOMEM;
goto error_3;
}
if (has_symlinks)
resolve_symlink(bucket, dcache);
print_vfs_message("ftpfs: got listing");
return dcache;
error_1:
disable_interrupt_key();
close_this_sock(fp, sock);
#ifdef OLD_READ
error_2:
#endif
getreply(qsock(bucket), NULL, 0);
error_3:
free(dcache->remote_path);
free(dcache);
linklist_destroy(file_list, ftpentry_destructor);
print_vfs_message("ftpfs: failed");
return NULL;
}
static int
store_file(struct ftpentry *fe)
{
int local_handle, sock, n, total;
#ifdef HAVE_STRUCT_LINGER
struct linger li;
#else
int flag_one = 1;
#endif
char buffer[8192];
struct stat s;
local_handle = open(fe->local_filename, O_RDONLY);
unlink (fe->local_filename);
if (local_handle == -1) {
ftpfserrno = EIO;
return 0;
}
fstat(local_handle, &s);
sock = open_data_connection(fe->bucket, "STOR", fe->remote_filename, TYPE_BINARY);
if (sock < 0) {
close(local_handle);
return 0;
}
#ifdef HAVE_STRUCT_LINGER
li.l_onoff = 1;
li.l_linger = 120;
setsockopt(sock, SOL_SOCKET, SO_LINGER, (char *) &li, sizeof(li));
#else
setsockopt(sock, SOL_SOCKET, SO_LINGER, &flag_one, sizeof (flag_one));
#endif
total = 0;
enable_interrupt_key();
while (1) {
while ((n = read(local_handle, buffer, sizeof(buffer))) < 0) {
if (errno == EINTR) {
if (got_interrupt()) {
ftpfserrno = EINTR;
goto error_return;
}
else
continue;
}
ftpfserrno = errno;
goto error_return;
}
if (n == 0)
break;
while (write(sock, buffer, n) < 0) {
if (errno == EINTR) {
if (got_interrupt()) {
ftpfserrno = EINTR;
goto error_return;
}
else
continue;
}
ftpfserrno = errno;
goto error_return;
}
total += n;
print_vfs_message("ftpfs: storing file %d (%d)",
total, s.st_size);
}
disable_interrupt_key();
close(sock);
close(local_handle);
if (getreply (qsock (fe->bucket), NULL, 0) != COMPLETE) {
ftpfserrno = EIO;
return 0;
}
return 1;
error_return:
disable_interrupt_key();
close(sock);
close(local_handle);
getreply(qsock(fe->bucket), NULL, 0);
return 0;
}
/* These variables are for the _ctl routine */
static char *localname = NULL;
static struct ftpentry *remoteent;
static int remotetotal = 0;
static int transfer_started = 0;
static char *remotebuffer;
static int isremotecopy = 0;
static int remotelocal_handle, remotesock, remoten, remotestat_size;
int retrieve_file_start(struct ftpentry *fe)
{
if (fe->local_filename == NULL) {
ftpfserrno = ENOMEM;
return 0;
}
remotesock = open_data_connection(fe->bucket, "RETR", fe->remote_filename, TYPE_BINARY);
if (remotesock == -1) {
ftpfserrno = EACCES;
free (fe->local_filename);
fe->local_filename = NULL;
return 0;
}
remotetotal = 0;
remoteent = fe;
return 1;
}
int retrieve_file_start2(struct ftpentry *fe)
{
remotelocal_handle = open(fe->local_filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
if (remotelocal_handle == -1) {
ftpfserrno = EIO;
free(fe->local_filename);
fe->local_filename = NULL;
fe->local_is_temp = 1;
close(remotesock);
return 0;
}
remotestat_size = fe->s.st_size;
remotebuffer = xmalloc (8192, "");
return 1;
}
void ftpfs_flushdir ()
{
force_expiration = 1;
}
int ftpfs_ctl (void *data, int ctlop, int arg)
{
int n = 0;
switch (ctlop) {
case MCCTL_ISREMOTECOPY:
return isremotecopy;
case MCCTL_REMOTECOPYCHUNK:
if (!transfer_started)
if (!retrieve_file_start2 (remoteent)){
return MCERR_TARGETOPEN;
} else
transfer_started = 1;
enable_interrupt_key ();
if (!remoten) {
int v = select_on_two (remotesock, 0);
if (((v < 0) && (errno == EINTR)) || v == 0){
disable_interrupt_key ();
return MCERR_DATA_ON_STDIN;
}
if ((n = read(remotesock, remotebuffer, 8192)) < 0){
disable_interrupt_key ();
if (errno == EINTR)
return MCERR_DATA_ON_STDIN;
else
return MCERR_READ;
}
if (n == 0) {
if (getreply (qsock (remoteent->bucket), NULL, 0) != COMPLETE) {
ftpfserrno = EIO;
}
close(remotelocal_handle);
close(remotesock);
if (localname){
free (localname);
localname = NULL;
}
disable_interrupt_key ();
transfer_started = 0;
return MCERR_FINISH;
}
disable_interrupt_key ();
remotetotal += n;
remoten = n;
} else
n = remoten;
if (write(remotelocal_handle, remotebuffer, remoten) < 0)
return MCERR_WRITE;
remoten = 0;
return n;
/* We get this message if the transfer was aborted */
case MCCTL_FINISHREMOTE:
if (localname) {
free (localname);
localname = NULL;
}
if (!arg) { /* OK */
if (stat (remoteent->local_filename, &remoteent->local_stat) < 0)
remoteent->local_stat.st_mtime = 0;
} else
remoteent->local_stat.st_mtime = 0;
transfer_started = 0;
ftpfs_abort (remoteent->bucket, remotesock);
ftpfserrno = EINTR;
return 0;
}
return 0;
}
int ftpfs_setctl (char *path, int ctlop, char *arg)
{
switch (ctlop) {
case MCCTL_SETREMOTECOPY: if (localname) free (localname);
localname = strdup (vfs_canon (arg));
return 1;
default:
return 0;
}
}
int retrieve_file(struct ftpentry *fe)
{
int total, tmp_reget = do_reget;
char buffer[8192];
int local_handle, sock, n;
if (fe->local_filename)
return 1;
fe->local_stat.st_mtime = 0;
fe->local_filename = strdup(tmpnam(NULL));
fe->local_is_temp = 1;
if (fe->local_filename == NULL) {
ftpfserrno = ENOMEM;
return 0;
}
local_handle = open(fe->local_filename, O_RDWR | O_CREAT | O_TRUNC, 0600);
if (local_handle == -1) {
ftpfserrno = EIO;
free(fe->local_filename);
fe->local_filename = NULL;
return 0;
}
sock = open_data_connection(fe->bucket, "RETR", fe->remote_filename, TYPE_BINARY);
if (sock == -1) {
ftpfserrno = EACCES;
goto error_3;
}
/* Clear the interrupt status */
enable_interrupt_key ();
total = 0;
if (tmp_reget > 0)
total = tmp_reget;
else
total = 0;
while (1) {
int stat_size = fe->s.st_size;
while ((n = read(sock, buffer, sizeof(buffer))) < 0) {
if (errno == EINTR) {
if (got_interrupt ()) {
disable_interrupt_key();
ftpfs_abort(fe->bucket, sock);
ftpfserrno = EINTR;
goto error_2;
}
else
continue;
}
ftpfserrno = errno;
disable_interrupt_key();
goto error_1;
}
if (n == 0)
break;
total += n;
if (stat_size == 0)
print_vfs_message ("ftpfs: Getting file: %ld bytes transfered",
total);
else
print_vfs_message ("ftpfs: Getting file: %3d%% (%ld bytes transfered)",
total*100/stat_size, total);
while (write(local_handle, buffer, n) < 0) {
if (errno == EINTR) {
if (got_interrupt()) {
ftpfs_abort(fe->bucket, sock);
ftpfserrno = EINTR;
goto error_2;
}
else
continue;
}
ftpfserrno = errno;
goto error_1;
}
}
close(local_handle);
close(sock);
if (getreply (qsock (fe->bucket), NULL, 0) != COMPLETE) {
ftpfserrno = EIO;
goto error_2;
}
if (stat (fe->local_filename, &fe->local_stat) < 0)
fe->local_stat.st_mtime = 0;
if (tmp_reget > 0)
fe->tmp_reget = 1;
return 1;
error_1:
getreply(qsock(fe->bucket), NULL, 0);
error_2:
close(sock);
error_3:
disable_interrupt_key ();
close(local_handle);
unlink(fe->local_filename);
free(fe->local_filename);
fe->local_filename = NULL;
return 0;
}
static struct ftpentry *
_get_file_entry(struct ftpfs_connection *bucket, char *file_name,
int op, int flags)
{
char *p, q;
struct ftpentry *ent;
struct linklist *file_list, *lptr;
struct ftpfs_dir *dcache;
struct stat sb;
p = strrchr(file_name, '/');
q = *p;
*p = '\0';
dcache = retrieve_dir(bucket, *file_name ? file_name : "/");
if (dcache == NULL)
return NULL;
file_list = dcache->file_list;
*p++ = q;
if (!*p)
p = ".";
for (lptr = file_list->next; lptr != file_list; lptr = lptr->next) {
ent = lptr->data;
if (strcmp(p, ent->name) == 0) {
if (S_ISLNK(ent->s.st_mode) && (op & FTPFS_RESOLVE_SYMLINK)) {
if (ent->l_stat == NULL) {
ftpfserrno = ENOENT;
return NULL;
}
if (S_ISLNK(ent->l_stat->st_mode)) {
ftpfserrno = ELOOP;
return NULL;
}
}
if (ent && (op & FTPFS_OPEN)) {
mode_t fmode;
fmode = S_ISLNK(ent->s.st_mode)
? ent->l_stat->st_mode
: ent->s.st_mode;
if (S_ISDIR(fmode)) {
ftpfserrno = EISDIR;
return NULL;
}
if (!S_ISREG(fmode)) {
ftpfserrno = EPERM;
return NULL;
}
if ((flags & O_EXCL) && (flags & O_CREAT)) {
ftpfserrno = EEXIST;
return NULL;
}
if (ent->remote_filename == NULL) {
ent->remote_filename = strdup(file_name);
if (ent->remote_filename == NULL) {
ftpfserrno = ENOMEM;
return NULL;
}
}
if (ent->local_filename == NULL ||
!ent->local_stat.st_mtime ||
stat (ent->local_filename, &sb) < 0 ||
sb.st_mtime != ent->local_stat.st_mtime) {
int handle;
if (ent->local_filename){
free (ent->local_filename);
ent->local_filename = 0;
}
if (flags & O_TRUNC) {
ent->local_filename = strdup(tmpnam(NULL));
if (ent->local_filename == NULL) {
ftpfserrno = ENOMEM;
return NULL;
}
handle = open(ent->local_filename, O_CREAT | O_TRUNC |
O_RDWR, 0600);
if (handle < 0) {
ftpfserrno = EIO;
return NULL;
}
close(handle);
if (stat (ent->local_filename, &ent->local_stat) < 0)
ent->local_stat.st_mtime = 0;
}
else {
if (localname != NULL) {
isremotecopy = 1;
ent->local_is_temp = 0;
ent->local_stat.st_mtime = 0;
ent->local_filename = strdup (localname);
if (!retrieve_file_start (ent)) {
isremotecopy = 0;
return NULL;
}
return ent;
}
if (!retrieve_file(ent))
return NULL;
}
}
else if (flags & O_TRUNC) {
truncate(ent->local_filename, 0);
}
}
return ent;
}
}
if ((op & FTPFS_OPEN) && (flags & O_CREAT)) {
int handle;
ent = xmalloc(sizeof(struct ftpentry), "struct ftpentry");
ent->freshly_created = 0;
ent->tmp_reget = 0;
if (ent == NULL) {
ftpfserrno = ENOMEM;
return NULL;
}
ent->count = 1;
ent->linkname = NULL;
ent->l_stat = NULL;
ent->bucket = bucket;
ent->name = strdup(p);
ent->remote_filename = strdup(file_name);
ent->local_filename = strdup(tmpnam(NULL));
if (!ent->name && !ent->remote_filename && !ent->local_filename) {
ftpentry_destructor(ent);
ftpfserrno = ENOMEM;
return NULL;
}
handle = creat(ent->local_filename, 0700);
if (handle == -1) {
ftpfserrno = EIO;
ftpentry_destructor(ent);
return NULL;
}
fstat(handle, &ent->s);
close(handle);
#if 0
/* This is very wrong - like this a zero length file will be always created
and usually preclude uploading anything more desirable */
#if defined(UPLOAD_ZERO_LENGTH_FILE)
if (!store_file(ent)) {
ftpentry_destructor(ent);
return NULL;
}
#endif
#endif
if (!linklist_insert(file_list, ent)) {
ftpfserrno = ENOMEM;
ftpentry_destructor(ent);
return NULL;
}
ent->freshly_created = 1;
return ent;
}
else {
ftpfserrno = ENOENT;
return NULL;
}
}
static struct ftpentry *
get_file_entry(char *path, int op, int flags)
{
struct ftpfs_connection *bucket;
struct ftpentry *fe;
char *remote_path;
if (!(remote_path = ftpfs_get_path (&bucket, path)))
return NULL;
isremotecopy = 0;
fe = _get_file_entry(bucket, remote_path, op,
flags);
free(remote_path);
#if 0
if (op & FTPFS_FREE_RESOURCE)
vfs_add_noncurrent_stamps (&ftpfs_vfs_ops, (vfsid) bucket, NULL);
#endif
return fe;
}
#define OPT_FLUSH 1
#define OPT_IGNORE_ERROR 2
static int ftpfs_normal_flush = 1;
void ftpfs_hint_reread(int reread)
{
if (reread)
ftpfs_normal_flush++;
else
ftpfs_normal_flush--;
}
static int
send_ftp_command(char *filename, char *cmd, int flags)
{
char *remote_path;
struct ftpfs_connection *bucket;
int r;
int flush_directory_cache = (flags & OPT_FLUSH) && (ftpfs_normal_flush > 0);
if (!(remote_path = ftpfs_get_path(&bucket, filename)))
return -1;
r = command (bucket, WAIT_REPLY, cmd, remote_path);
free(remote_path);
vfs_add_noncurrent_stamps (&ftpfs_vfs_ops, (vfsid) bucket, NULL);
if (flags & OPT_IGNORE_ERROR)
r = COMPLETE;
if (r != COMPLETE) {
ftpfserrno = EPERM;
return -1;
}
if (flush_directory_cache)
flush_all_directory(bucket);
return 0;
}
/* This routine is called as the last step in load_setup */
void
ftpfs_init_passwd(void)
{
struct passwd *passwd_info;
char *p, hostname[MAXHOSTNAMELEN];
struct hostent *hp;
ftpfs_anonymous_passwd = load_anon_passwd ();
if (ftpfs_anonymous_passwd)
return;
if ((passwd_info = getpwuid (geteuid ())) == NULL)
p = "guest";
else
p = passwd_info->pw_name;
gethostname(hostname, sizeof(hostname));
hp = gethostbyname(hostname);
if (hp != NULL)
ftpfs_anonymous_passwd = copy_strings (p, "@", hp->h_name, NULL);
else
ftpfs_anonymous_passwd = copy_strings (p, "@", hostname, NULL);
endpwent ();
}
void
ftpfs_init ()
{
ftpfs_connections_list = linklist_init();
ftpfs_directory_timeout = FTPFS_DIRECTORY_TIMEOUT;
}
void
ftpfs_done(void)
{
linklist_destroy(ftpfs_connections_list, ftpfs_connection_destructor);
if (ftpfs_debug_server_dialog)
fclose (ftpfs_logfile);
}
/* The callbacks */
struct ftpfs_filp {
unsigned int has_changed:1;
struct ftpentry *fe;
int local_handle;
};
static void *ftpfs_open (char *file, int flags, int mode)
{
struct ftpfs_filp *fp;
struct ftpentry *fe;
fp = xmalloc(sizeof(struct ftpfs_filp), "struct ftpfs_filp");
if (fp == NULL) {
ftpfserrno = ENOMEM;
return NULL;
}
fe = get_file_entry(file, FTPFS_OPEN | FTPFS_RESOLVE_SYMLINK, flags);
if (fe == NULL) {
free(fp);
return NULL;
}
if (!isremotecopy) {
fp->local_handle = open(fe->local_filename, flags, mode);
if (fp->local_handle < 0) {
ftpfserrno = errno;
free(fp);
return NULL;
}
} else
fp->local_handle = -1;
#ifdef UPLOAD_ZERO_LENGTH_FILE
fp->has_changed = fe->freshly_created;
#else
fp->has_changed = 0;
#endif
fp->fe = fe;
qlock(fe->bucket)++;
fe->count++;
return fp;
}
static int ftpfs_read (void *data, char *buffer, int count)
{
struct ftpfs_filp *fp;
int n;
fp = data;
n = read(fp->local_handle, buffer, count);
if (n < 0)
ftpfserrno = errno;
return n;
}
int ftpfs_write (void *data, char *buf, int nbyte)
{
struct ftpfs_filp *fp;
int n;
fp = data;
n = write(fp->local_handle, buf, nbyte);
if (n < 0)
ftpfserrno = errno;
fp->has_changed = 1;
return n;
}
static int ftpfs_close (void *data)
{
struct ftpfs_filp *fp = data;
int result = 0;
if (fp->has_changed) {
if (!store_file(fp->fe))
result = -1;
if (ftpfs_normal_flush)
flush_all_directory(fp->fe->bucket);
}
if (fp->local_handle >= 0)
close(fp->local_handle);
qlock(fp->fe->bucket)--;
ftpentry_destructor(fp->fe);
free(fp);
return result;
}
static int ftpfs_errno (void)
{
return ftpfserrno;
}
/* Explanation:
* On some operating systems (Slowaris 2 for example)
* the d_name member is just a char long (Nice trick that break everything,
* so we need to set up some space for the filename.
*/
struct ftpfs_dirent {
struct dirent dent;
#ifdef NEED_EXTRA_DIRENT_BUFFER
char extra_buffer [MC_MAXPATHLEN];
#endif
struct linklist *pos;
struct ftpfs_dir *dcache;
};
char *ftpfs_gethome (char *servername)
{
struct ftpfs_connection *bucket;
char *remote_path;
if (!(remote_path = ftpfs_get_path (&bucket, servername)))
return NULL;
free (remote_path);
return qhome(bucket);
}
char *ftpfs_getupdir (char *servername)
{
struct ftpfs_connection *bucket;
char *remote_path;
if (!(remote_path = ftpfs_get_path (&bucket, servername)))
return NULL;
free (remote_path);
return qupdir(bucket);
}
static void *ftpfs_opendir (char *dirname)
{
struct ftpfs_connection *bucket;
char *remote_path;
struct ftpfs_dirent *dirp;
if (!(remote_path = ftpfs_get_path (&bucket, dirname)))
return NULL;
dirp = xmalloc(sizeof(struct ftpfs_dirent), "struct ftpfs_dirent");
if (dirp == NULL) {
ftpfserrno = ENOMEM;
goto error_return;
}
dirp->dcache = retrieve_dir(bucket, remote_path);
if (dirp->dcache == NULL)
goto error_return;
dirp->pos = dirp->dcache->file_list->next;
free(remote_path);
dirp->dcache->count++;
return (void *)dirp;
error_return:
vfs_add_noncurrent_stamps (&ftpfs_vfs_ops, (vfsid) bucket, NULL);
free(remote_path);
free(dirp);
return NULL;
}
static void *ftpfs_readdir (void *data)
{
struct ftpentry *fe;
struct ftpfs_dirent *dirp = data;
if (dirp->pos == dirp->dcache->file_list)
return NULL;
fe = dirp->pos->data;
strcpy (&(dirp->dent.d_name [0]), fe->name);
#ifndef DIRENT_LENGTH_COMPUTED
dirp->d_namlen = strlen (dirp->d_name);
#endif
dirp->pos = dirp->pos->next;
return (void *) &dirp->dent;
}
static int ftpfs_closedir (void *info)
{
struct ftpfs_dirent *dirp = info;
ftpfs_dir_destructor(dirp->dcache);
free(dirp);
return 0;
}
static int ftpfs_lstat (char *path, struct stat *buf)
{
struct ftpentry *fe;
fe = get_file_entry(path, FTPFS_FREE_RESOURCE, 0);
if (fe) {
*buf = fe->s;
return 0;
}
else
return -1;
}
static int ftpfs_stat (char *path, struct stat *buf)
{
struct ftpentry *fe;
fe = get_file_entry(path, FTPFS_RESOLVE_SYMLINK | FTPFS_FREE_RESOURCE, 0);
if (fe) {
if (!S_ISLNK(fe->s.st_mode))
*buf = fe->s;
else
*buf = *fe->l_stat;
return 0;
}
else
return -1;
}
int ftpfs_fstat (void *data, struct stat *buf)
{
struct ftpfs_filp *fp = data;
if (!S_ISLNK(fp->fe->s.st_mode))
*buf = fp->fe->s;
else
*buf = *fp->fe->l_stat;
return 0;
}
int ftpfs_chmod (char *path, int mode)
{
char buf[40];
sprintf(buf, "SITE CHMOD %4.4o %%s", mode & 07777);
return send_ftp_command(path, buf, OPT_IGNORE_ERROR | OPT_FLUSH);
}
int ftpfs_chown (char *path, int owner, int group)
{
#if 0
ftpfserrno = EPERM;
return -1;
#else
/* Everyone knows it is not possible to chown remotely, so why bother them.
If someone's root, then copy/move will always try to chown it... */
return 0;
#endif
}
static int ftpfs_readlink (char *path, char *buf, int size)
{
struct ftpentry *fe;
fe = get_file_entry(path, FTPFS_FREE_RESOURCE, 0);
if (!fe)
return -1;
if (!S_ISLNK(fe->s.st_mode)) {
ftpfserrno = EINVAL;
return -1;
}
if (fe->linkname == NULL) {
ftpfserrno = EACCES;
return -1;
}
if (strlen(fe->linkname) >= size) {
ftpfserrno = ERANGE;
return -1;
}
strncpy(buf, fe->linkname, size);
return strlen(fe->linkname);
}
static int ftpfs_unlink (char *path)
{
return send_ftp_command(path, "DELE %s", 1);
}
static int ftpfs_symlink (char *n1, char *n2)
{
ftpfserrno = EPERM;
return -1;
}
static int ftpfs_rename (char *path1, char *path2)
{
ftpfserrno = EPERM;
return -1;
}
static int
__ftpfs_chdir (struct ftpfs_connection *bucket ,char *remote_path)
{
#ifdef ARE_WE_SURE_WE_DONT_NEED_THIS_P
int r;
#endif
if (ftpfs_same_dir (remote_path, bucket))
return COMPLETE;
#ifdef ARE_WE_SURE_WE_DONT_NEED_THIS_P
r = command (bucket, WAIT_REPLY, "CWD %s", remote_path);
if (r != COMPLETE) {
ftpfserrno = EIO;
} else {
if (qcdir(bucket))
free(qcdir(bucket));
qcdir(bucket) = strdup (remote_path);
}
return r;
#else
if (qcdir(bucket))
free(qcdir(bucket));
qcdir(bucket) = strdup (remote_path);
return COMPLETE;
#endif
}
static int ftpfs_chdir (char *path)
{
char *remote_path;
struct ftpfs_connection *bucket;
int r;
retry:
if (!(remote_path = ftpfs_get_path(&bucket, path)))
return -1;
got_sigpipe = 0;
r = __ftpfs_chdir (bucket, remote_path);
free (remote_path);
if (got_sigpipe)
goto retry;
vfs_add_noncurrent_stamps (&ftpfs_vfs_ops, (vfsid) bucket, NULL);
return r == COMPLETE ? 0 : -1;
}
static int ftpfs_lseek (void *data, off_t offset, int whence)
{
struct ftpfs_filp *fp = data;
return lseek(fp->local_handle, offset, whence);
}
static int ftpfs_mknod (char *path, int mode, int dev)
{
ftpfserrno = EPERM;
return -1;
}
static int ftpfs_mkdir (char *path, mode_t mode)
{
return send_ftp_command(path, "MKD %s", 1);
}
static int ftpfs_rmdir (char *path)
{
return send_ftp_command(path, "RMD %s", 1);
}
static int ftpfs_link (char *p1, char *p2)
{
ftpfserrno = EPERM;
return -1;
}
static vfsid ftpfs_getid (char *p, struct vfs_stamping **parent)
{
struct ftpfs_connection *bucket;
char *remote_path;
*parent = NULL; /* We are not enclosed in any other fs */
if (!(remote_path = ftpfs_get_path (&bucket, p)))
return (vfsid) -1;
else {
free(remote_path);
return (vfsid) bucket;
}
}
static int ftpfs_nothingisopen (vfsid id)
{
return qlock((struct ftpfs_connection *)id) == 0;
}
static void ftpfs_free (vfsid id)
{
struct ftpfs_connection *bucket = (struct ftpfs_connection *) id;
ftpfs_connection_destructor(bucket);
linklist_delete(ftpfs_connections_list, bucket);
}
static char *ftpfs_getlocalcopy (char *path)
{
struct ftpfs_filp *fp = (struct ftpfs_filp *) ftpfs_open (path, O_RDONLY, 0);
char *p;
if (fp == NULL)
return NULL;
if (fp->fe->local_filename == NULL) {
ftpfs_close ((void *) fp);
return NULL;
}
p = strdup (fp->fe->local_filename);
qlock(fp->fe->bucket)++;
fp->fe->count++;
ftpfs_close ((void *) fp);
return p;
}
static void ftpfs_ungetlocalcopy (char *path, char *local, int has_changed)
{
struct ftpfs_filp *fp = (struct ftpfs_filp *) ftpfs_open (path, O_WRONLY, 0);
if (fp == NULL)
return;
if (!strcmp (fp->fe->local_filename, local)) {
fp->has_changed = has_changed;
qlock(fp->fe->bucket)--;
ftpentry_destructor(fp->fe);
ftpfs_close ((void *) fp);
} else {
/* Should not happen */
ftpfs_close ((void *) fp);
mc_def_ungetlocalcopy (path, local, has_changed);
}
}
void ftpfs_set_debug (char *file)
{
if ((ftpfs_logfile = fopen (file, "w+")) != NULL)
ftpfs_debug_server_dialog = 1;
}
void ftpfs_forget (char *file)
{
struct linklist *l;
char *host, *user, *pass, *rp;
int port;
if (strncmp (file, "ftp://", 6) != 0)
return;
file += 6;
if (!(rp = ftpfs_get_host_and_username (file, &host, &user, &port, &pass))) {
free (host);
free (user);
if (pass)
wipe_password (pass);
return;
}
/* we do not care about the path actually */
free (rp);
for (l = ftpfs_connections_list->next; l != ftpfs_connections_list; l = l->next){
struct ftpfs_connection *bucket = l->data;
if ((strcmp (host, qhost (bucket)) == 0) &&
(strcmp (user, quser (bucket)) == 0) &&
(port == qport (bucket))){
/* close socket: the child owns it now */
close (bucket->sock);
bucket->sock = -1;
/* reopen the connection */
bucket->sock = ftpfs_open_socket (bucket);
if (bucket->sock != -1)
login_server (bucket, pass);
break;
}
}
free (host);
free (user);
if (pass)
wipe_password (pass);
}
#ifdef HAVE_MMAP
caddr_t ftpfs_mmap (caddr_t addr, size_t len, int prot, int flags, void *data, off_t offset)
{
return (caddr_t)-1; /* We do not mmap to far away */
}
int ftpfs_munmap (caddr_t addr, size_t len, void *data)
{
return -1;
}
#endif
vfs ftpfs_vfs_ops = {
ftpfs_open,
ftpfs_close,
ftpfs_read,
ftpfs_write,
ftpfs_opendir,
ftpfs_readdir,
ftpfs_closedir,
ftpfs_stat,
ftpfs_lstat,
ftpfs_fstat,
ftpfs_chmod,
ftpfs_chown,
NULL,
ftpfs_readlink,
ftpfs_symlink,
ftpfs_link,
ftpfs_unlink,
ftpfs_rename,
ftpfs_chdir,
ftpfs_errno,
ftpfs_lseek,
ftpfs_mknod,
ftpfs_getid,
ftpfs_nothingisopen,
ftpfs_free,
ftpfs_getlocalcopy,
ftpfs_ungetlocalcopy,
ftpfs_mkdir,
ftpfs_rmdir,
ftpfs_ctl,
ftpfs_setctl,
ftpfs_forget
#ifdef HAVE_MMAP
, ftpfs_mmap,
ftpfs_munmap
#endif
};
#ifdef USE_NETRC
static char buffer[100];
static char *netrc, *netrcp;
static int netrc_next (void)
{
char *p;
int i;
static char *keywords [] = { "default", "machine",
"login", "password", "passwd",
"account", "macdef" };
while (1) {
netrcp = skip_separators (netrcp);
if (*netrcp != '\n')
break;
netrcp++;
}
if (!*netrcp)
return 0;
p = buffer;
if (*netrcp == '"') {
for (;*netrcp != '"' && *netrcp; netrcp++) {
if (*netrcp == '\\')
netrcp++;
*p++ = *netrcp;
}
} else {
for (;*netrcp != '\n' && *netrcp != '\t' && *netrcp != ' ' &&
*netrcp != ',' && *netrcp; netrcp++) {
if (*netrcp == '\\')
netrcp++;
*p++ = *netrcp;
}
}
*p = 0;
if (!*buffer)
return 0;
for (i = 0; i < sizeof (keywords) / sizeof (keywords [0]); i++)
if (!strcmp (keywords [i], buffer))
break;
return i + 1;
}
int lookup_netrc (char *host, char **login, char **pass)
{
char *netrcname, *tmp;
char hostname[MAXHOSTNAMELEN], *domain;
int keyword;
struct stat mystat;
static int be_angry = 1;
static struct rupcache {
struct rupcache *next;
char *host;
char *login;
char *pass;
} *rup_cache = NULL, *rupp;
for (rupp = rup_cache; rupp != NULL; rupp = rupp->next)
if (!strcmp (host, rupp->host)) {
if (rupp->login != NULL)
*login = strdup (rupp->login);
if (rupp->pass != NULL)
*pass = strdup (rupp->pass);
return 0;
}
netrcname = xmalloc (strlen (home_dir) + strlen ("/.netrc") + 1, "netrc");
strcpy (netrcname, home_dir);
strcat (netrcname, "/.netrc");
netrcp = netrc = load_file (netrcname);
if (netrc == NULL) {
free (netrcname);
return 0;
}
if (gethostname (hostname, sizeof (hostname)) < 0)
*hostname = 0;
if (!(domain = strchr (hostname, '.')))
domain = "";
while ((keyword = netrc_next ())) {
if (keyword == 2) {
if (netrc_next () != 8)
continue;
if (strcasecmp (host, buffer) &&
((tmp = strchr (host, '.')) == NULL ||
strcasecmp (tmp, domain) ||
strncasecmp (host, buffer, tmp - host) ||
buffer [tmp - host]))
continue;
} else if (keyword != 1)
continue;
while ((keyword = netrc_next ()) > 2) {
switch (keyword) {
case 3:
if (netrc_next ())
if (*login == NULL)
*login = strdup (buffer);
else if (strcmp (*login, buffer))
keyword = 20;
break;
case 4:
case 5:
if (strcmp (*login, "anonymous") && strcmp (*login, "ftp") &&
stat (netrcname, &mystat) >= 0 &&
(mystat.st_mode & 077)) {
if (be_angry) {
message_1s (1, "Error", "~/.netrc file has not correct mode.\n"
"Remove password or correct mode.");
be_angry = 0;
}
free (netrc);
free (netrcname);
return -1;
}
if (netrc_next () && *pass == NULL)
*pass = strdup (buffer);
break;
case 6:
if (stat (netrcname, &mystat) >= 0 &&
(mystat.st_mode & 077)) {
if (be_angry) {
message_1s (1, "Error", "~/.netrc file has not correct mode.\n"
"Remove password or correct mode.");
be_angry = 0;
}
free (netrc);
free (netrcname);
return -1;
}
netrc_next ();
break;
case 7:
for (;;) {
while (*netrcp != '\n' && *netrcp);
if (*netrcp != '\n')
break;
netrcp++;
if (*netrcp == '\n' || !*netrcp)
break;
}
break;
}
if (keyword == 20)
break;
}
if (keyword == 20)
continue;
else
break;
}
rupp = (struct rupcache *) xmalloc (sizeof (struct rupcache), "");
rupp->host = strdup (host);
rupp->login = rupp->pass = 0;
if (*login != NULL)
rupp->login = strdup (*login);
if (*pass != NULL)
rupp->pass = strdup (*pass);
rupp->next = rup_cache;
rup_cache = rupp;
free (netrc);
free (netrcname);
return 0;
}
#ifndef HAVE_STRNCASECMP
int strncasecmp (char *s, char *d, int l)
{
int result;
while (l--){
if (result = (0x20 | *s) - (0x20 | *d))
break;
if (!*s)
return 0;
s++;
d++;
}
}
#endif
#endif /* USE_NETRC */
Reference in New Issue View Git Blame Copy Permalink