mirrors
/
mc
mirror of https://github.com/MidnightCommander/mc
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
mc/vfs/mcfs.c

1160 lines
27 KiB
C
Raw Blame History

/* Virtual File System: Midnight Commander file system.
Copyright (C) 1995, 1996, 1997 The Free Software Foundation
Written by Miguel de Icaza
Andrej Borsenkow
Norbert Warmuth
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* Namespace: exports mcfs_vfs_ops, tcp_invalidate_socket */
#include <config.h>
#ifdef WITH_MCFS
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdarg.h>
#include <pwd.h>
#include <sys/types.h> /* POSIX-required by sys/socket.h and netdb.h */
#include <netdb.h> /* struct hostent */
#include <sys/socket.h> /* AF_INET */
#include <netinet/in.h> /* struct in_addr */
#ifdef HAVE_ARPA_INET_H
#include <arpa/inet.h>
#endif
#include "utilvfs.h"
#include "vfs.h"
#include "mcfs.h"
#include "tcputil.h"
#include "../src/dialog.h"
#define MCFS_MAX_CONNECTIONS 32
static struct _mcfs_connection {
char *host;
char *user;
char *home;
int sock;
int port;
int version;
} mcfs_connections [MCFS_MAX_CONNECTIONS];
#define mcserver_port 9876
typedef struct _mcfs_connection mcfs_connection;
typedef struct { int handle; mcfs_connection *conn; } mcfs_handle;
static int my_errno;
static char *mcfs_gethome (mcfs_connection *mc);
/* Extract the hostname and username from the path */
/* path is in the form: hostname:user/remote-dir */
static char *mcfs_get_host_and_username (char *path, char **host, char **user,
int *port, char **pass)
{
return vfs_split_url (path, host, user, port, pass, 0, 0);
}
static void mcfs_fill_names (vfs *me, void (*func)(char *))
{
int i;
char *name;
for (i = 0; i < MCFS_MAX_CONNECTIONS; i++){
if (mcfs_connections [i].host == 0)
continue;
name = g_strconcat ("/#mc:", mcfs_connections [i].user,
"@", mcfs_connections [i].host, NULL);
(*func) (name);
g_free (name);
}
}
/* This routine checks the server RPC version and logs the user in */
static int mcfs_login_server (int my_socket, char *user, int port,
int port_autodetected, char *netrcpass,
int *version)
{
int result;
char *pass;
/* Send the version number */
rpc_send (my_socket, RPC_INT, *version, RPC_END);
if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
return 0;
if (result != MC_VERSION_OK){
message_1s (1, _(" MCFS "), _(" The server does not support this version "));
close (my_socket);
return 0;
}
/* FIXME: figure out why last_current_dir used to be passed here */
rpc_send (my_socket, RPC_INT, MC_LOGIN, RPC_STRING, "/",
RPC_STRING, user, RPC_END);
if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
return 0;
if (result == MC_NEED_PASSWORD){
if (port > 1024 && port_autodetected){
int v;
v = query_dialog (_(" Warning "),
_(" The remote server is not running on a system port \n"
" you need a password to log in, but the information may \n"
" not be safe on the remote side. Continue? \n"), 3, 2,
_(" Yes "), _(" No "));
if (v == 1){
close (my_socket);
return 0;
}
}
if (netrcpass != NULL)
pass = g_strdup (netrcpass);
else
pass = vfs_get_password (_(" MCFS Password required "));
if (!pass){
rpc_send (my_socket, RPC_INT, MC_QUIT, RPC_END);
close (my_socket);
return 0;
}
rpc_send (my_socket, RPC_INT, MC_PASS, RPC_STRING, pass, RPC_END);
wipe_password (pass);
if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
return 0;
if (result != MC_LOGINOK){
message_1s (1, _(" MCFS "), _(" Invalid password "));
rpc_send (my_socket, RPC_INT, MC_QUIT, RPC_END);
close (my_socket);
return 0;
}
}
return my_socket;
}
/* This used to be in utilvfs.c, but as it deals with portmapper, it
is probably usefull for mcfs */
static int
open_tcp_link (char *host, int *port, int *version, char *caller)
{
struct sockaddr_in server_address;
unsigned long inaddr;
struct hostent *hp;
int my_socket;
if (!*host)
return 0;
memset ((char *) &server_address, 0, sizeof (server_address));
server_address.sin_family = AF_INET;
/* Try to use the dotted decimal number */
if ((inaddr = inet_addr (host)) != -1)
memcpy ((char *) &server_address.sin_addr, (char *) &inaddr,
sizeof (inaddr));
else {
if ((hp = gethostbyname (host)) == NULL){
message_2s (1, caller, _(" Cannot locate hostname: %s "), host);
return 0;
}
memcpy ((char *) &server_address.sin_addr, (char *) hp->h_addr,
hp->h_length);
}
/* Try to contact a remote portmapper to obtain the listening port */
if (*port == 0){
*port = get_remote_port (&server_address, version);
if (*port < 1)
return 0;
} else
*version = 1;
server_address.sin_port = htons (*port);
if ((my_socket = socket (AF_INET, SOCK_STREAM, 0)) < 0){
message_2s (1, caller, _(" Cannot create socket: %s "),
unix_error_string(errno));
return 0;
}
if (connect (my_socket, (struct sockaddr *) &server_address,
sizeof (server_address)) < 0){
message_2s (1, caller, _(" Cannot connect to server: %s "),
unix_error_string (errno));
close (my_socket);
return 0;
}
return my_socket;
}
static int mcfs_open_tcp_link (char *host, char *user,
int *port, char *netrcpass, int *version)
{
int my_socket;
int old_port = *port;
my_socket = open_tcp_link (host, port, version, " MCfs ");
if (my_socket <= 0)
return 0;
/* We got the connection to the server, verify if the server
implements our version of the RPC mechanism and then login
the user.
*/
return mcfs_login_server (my_socket, user, *port, old_port == 0,
netrcpass, version);
}
static int mcfs_get_free_bucket_init = 1;
static mcfs_connection *mcfs_get_free_bucket (void)
{
int i;
if (mcfs_get_free_bucket_init) {
mcfs_get_free_bucket_init = 0;
for (i = 0; i < MCFS_MAX_CONNECTIONS; i++)
mcfs_connections [i].host = 0;
}
for (i = 0; i < MCFS_MAX_CONNECTIONS; i++){
if (!mcfs_connections [i].host)
return &mcfs_connections [i];
}
/* This can't happend, since we have checked for max connections before */
vfs_die("Internal error: mcfs_get_free_bucket");
return 0; /* shut up, stupid gcc */
}
/* This routine keeps track of open connections */
/* Returns a connected socket to host */
static mcfs_connection *mcfs_open_link (char *host, char *user, int *port, char *netrcpass)
{
static int mcfs_open_connections = 0;
int i, sock, version;
mcfs_connection *bucket;
/* Is the link actually open? */
if (mcfs_get_free_bucket_init) {
mcfs_get_free_bucket_init = 0;
for (i = 0; i < MCFS_MAX_CONNECTIONS; i++)
mcfs_connections [i].host = 0;
} else for (i = 0; i < MCFS_MAX_CONNECTIONS; i++){
if (!mcfs_connections [i].host)
continue;
if ((strcmp (host, mcfs_connections [i].host) == 0) &&
(strcmp (user, mcfs_connections [i].user) == 0))
return &mcfs_connections [i];
}
if (mcfs_open_connections == MCFS_MAX_CONNECTIONS){
message_1s (1, MSG_ERROR, _(" Too many open connections "));
return 0;
}
if (!(sock = mcfs_open_tcp_link (host, user, port, netrcpass, &version)))
return 0;
bucket = mcfs_get_free_bucket ();
mcfs_open_connections++;
bucket->host = g_strdup (host);
bucket->user = g_strdup (user);
bucket->home = 0;
bucket->port = *port;
bucket->sock = sock;
bucket->version = version;
return bucket;
}
static int is_error (int result, int errno_num)
{
if (!(result == -1))
return my_errno = 0;
else
my_errno = errno_num;
return 1;
}
static int the_error (int result, int errno_num)
{
if (result == -1)
my_errno = errno_num;
else
my_errno = 0;
return result;
}
static char *mcfs_get_path (mcfs_connection **mc, char *path)
{
char *user, *host, *remote_path;
char *pass;
int port;
/* An absolute path name, try to determine connection socket */
if (strncmp (path, "/#mc:", 5))
return NULL;
path += 5;
/* Port = 0 means that open_tcp_link will try to contact the
* remote portmapper to get the port number
*/
port = 0;
if ((remote_path = mcfs_get_host_and_username(path, &host, &user, &port, &pass)))
if (!(*mc = mcfs_open_link (host, user, &port, pass))){
g_free (remote_path);
remote_path = NULL;
}
g_free (host);
g_free (user);
if (pass)
wipe_password (pass);
if (!remote_path)
return NULL;
/* NOTE: tildes are deprecated. See ftpfs.c */
{
int f = !strcmp( remote_path, "/~" );
if (f || !strncmp( remote_path, "/~/", 3 )) {
char *s;
s = concat_dir_and_file( mcfs_gethome (*mc), remote_path +3-f );
g_free (remote_path);
remote_path = s;
}
}
return remote_path;
}
/* Simple function for routines returning only an integer from the server */
static int mcfs_handle_simple_error (int sock, int return_status)
{
int status, error;
if (0 == rpc_get (sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
return the_error (-1, EIO);
if (is_error (status, error))
return -1;
if (return_status)
return status;
return 0;
}
/* Nice wrappers */
static int mcfs_rpc_two_paths (int command, char *s1, char *s2)
{
mcfs_connection *mc;
char *r1, *r2;
if ((r1 = mcfs_get_path (&mc, s1)) == 0)
return -1;
if ((r2 = mcfs_get_path (&mc, s2)) == 0){
g_free (r1);
return -1;
}
rpc_send (mc->sock,
RPC_INT, command,
RPC_STRING, r1,
RPC_STRING, r2,
RPC_END);
g_free (r1);
g_free (r2);
return mcfs_handle_simple_error (mc->sock, 0);
}
static int mcfs_rpc_path (int command, char *path)
{
mcfs_connection *mc;
char *remote_file;
if ((remote_file = mcfs_get_path (&mc, path)) == 0)
return -1;
rpc_send (mc->sock,
RPC_INT, command,
RPC_STRING, remote_file,
RPC_END);
g_free (remote_file);
return mcfs_handle_simple_error (mc->sock, 0);
}
static int mcfs_rpc_path_int (int command, char *path, int data)
{
mcfs_connection *mc;
char *remote_file;
if ((remote_file = mcfs_get_path (&mc, path)) == 0)
return -1;
rpc_send (mc->sock,
RPC_INT, command,
RPC_STRING, remote_file,
RPC_INT, data, RPC_END);
g_free (remote_file);
return mcfs_handle_simple_error (mc->sock, 0);
}
static int mcfs_rpc_path_int_int (int command, char *path, int n1, int n2)
{
mcfs_connection *mc;
char *remote_file;
if ((remote_file = mcfs_get_path (&mc, path)) == 0)
return -1;
rpc_send (mc->sock,
RPC_INT, command,
RPC_STRING, remote_file,
RPC_INT, n1,
RPC_INT, n2,
RPC_END);
g_free (remote_file);
return mcfs_handle_simple_error (mc->sock, 0);
}
static char *mcfs_gethome (mcfs_connection *mc)
{
char *buffer;
if (mc->home)
return g_strdup (mc->home);
else {
rpc_send (mc->sock, RPC_INT, MC_GETHOME, RPC_END);
if (0 == rpc_get (mc->sock, RPC_STRING, &buffer, RPC_END))
return g_strdup (PATH_SEP_STR);
mc->home = buffer;
return g_strdup (buffer);
}
}
/* The callbacks */
static void *mcfs_open (vfs *me, char *file, int flags, int mode)
{
char *remote_file;
mcfs_connection *mc;
int result, error_num;
mcfs_handle *remote_handle;
if (!(remote_file = mcfs_get_path (&mc, file)))
return 0;
rpc_send (mc->sock, RPC_INT, MC_OPEN, RPC_STRING, remote_file,
RPC_INT, flags, RPC_INT, mode, RPC_END);
g_free (remote_file);
if (0 == rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error_num, RPC_END))
return 0;
if (is_error (result, error_num))
return 0;
remote_handle = g_new (mcfs_handle, 2);
remote_handle->handle = result;
remote_handle->conn = mc;
return remote_handle;
}
static int mcfs_read (void *data, char *buffer, int count)
{
mcfs_handle *info = (mcfs_handle *) data;
int result, error;
int handle;
mcfs_connection *mc;
mc = info->conn;
handle = info->handle;
rpc_send (mc->sock, RPC_INT, MC_READ, RPC_INT, handle,
RPC_INT, count, RPC_END);
if (0 == rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
return the_error (-1, EIO);
if (is_error (result, error))
return 0;
if (0 == rpc_get (mc->sock, RPC_BLOCK, result, buffer, RPC_END))
return the_error (-1, EIO);
return result;
}
static int mcfs_write (void *data, char *buf, int nbyte)
{
mcfs_handle *info = (mcfs_handle *) data;
mcfs_connection *mc;
int handle;
mc = info->conn;
handle = info->handle;
rpc_send (mc->sock,
RPC_INT, MC_WRITE,
RPC_INT, handle,
RPC_INT, nbyte,
RPC_BLOCK, nbyte, buf,
RPC_END);
return mcfs_handle_simple_error (mc->sock, 1);
}
static int mcfs_close (void *data)
{
mcfs_handle *info = (mcfs_handle *) data;
mcfs_connection *mc;
int handle, result, error;
if (!data)
return -1;
handle = info->handle;
mc = info->conn;
rpc_send (mc->sock, RPC_INT, MC_CLOSE, RPC_INT, handle, RPC_END);
if (0 == rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
return the_error (-1, EIO);
is_error (result, error);
g_free (data);
return result;
}
static int mcfs_errno (vfs *me)
{
return my_errno;
}
typedef struct dir_entry {
char *text;
struct dir_entry *next;
struct stat my_stat;
int merrno;
} dir_entry;
typedef struct {
mcfs_connection *conn;
int handle;
dir_entry *entries;
dir_entry *current;
} opendir_info;
static void *mcfs_opendir (vfs *me, char *dirname)
{
opendir_info *mcfs_info;
mcfs_connection *mc;
int handle, error_num;
char *remote_dir;
int result;
if (!(remote_dir = mcfs_get_path (&mc, dirname)))
return 0;
rpc_send (mc->sock, RPC_INT, MC_OPENDIR, RPC_STRING, remote_dir, RPC_END);
g_free (remote_dir);
if (0 == rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error_num, RPC_END))
return 0;
if (is_error (result, error_num))
return 0;
handle = result;
mcfs_info = g_new (opendir_info, 1);
mcfs_info->conn = mc;
mcfs_info->handle = handle;
mcfs_info->entries = 0;
mcfs_info->current = 0;
return mcfs_info;
}
static int get_stat_info (mcfs_connection *mc, struct stat *buf);
static int mcfs_loaddir (opendir_info *mcfs_info)
{
int status, error;
mcfs_connection *mc = mcfs_info->conn;
int link = mc->sock;
int first = 1;
rpc_send (link, RPC_INT, MC_READDIR, RPC_INT, mcfs_info->handle, RPC_END);
for (;;){
int entry_len;
dir_entry *new_entry;
if (!rpc_get (link, RPC_INT, &entry_len, RPC_END))
return 0;
if (entry_len == 0)
break;
new_entry = g_new (dir_entry, 1);
new_entry->text = g_new0 (char, entry_len + 1);
new_entry->next = 0;
if (first){
mcfs_info->entries = new_entry;
mcfs_info->current = new_entry;
first = 0;
} else {
mcfs_info->current->next = new_entry;
mcfs_info->current = new_entry;
}
if (!rpc_get (link, RPC_BLOCK, entry_len, new_entry->text, RPC_END))
return 0;
/* Then we get the status from the lstat */
if (!rpc_get (link, RPC_INT, &status, RPC_INT, &error, RPC_END))
return 0;
if (is_error (status, error))
new_entry->merrno = error;
else {
new_entry->merrno = 0;
if (!get_stat_info (mc, &(new_entry->my_stat)))
return 0;
}
}
mcfs_info->current = mcfs_info->entries;
return 1;
}
static void mcfs_free_dir (dir_entry *de)
{
if (!de)
return;
mcfs_free_dir (de->next);
g_free (de->text);
g_free (de);
}
static union vfs_dirent mcfs_readdir_data;
/* The readdir routine loads the complete directory */
/* It's too slow to ask the server each time */
/* It now also sends the complete lstat information for each file */
static struct stat *cached_lstat_info;
static void *mcfs_readdir(void *info)
{
opendir_info *mcfs_info;
char *dirent_dest;
mcfs_info = (opendir_info *) info;
if (!mcfs_info->entries)
if (!mcfs_loaddir(mcfs_info))
return NULL;
if (mcfs_info->current == 0) {
cached_lstat_info = 0;
mcfs_free_dir(mcfs_info->entries);
mcfs_info->entries = 0;
return NULL;
}
dirent_dest = mcfs_readdir_data.dent.d_name;
strncpy(dirent_dest, mcfs_info->current->text, MC_MAXPATHLEN);
dirent_dest[MC_MAXPATHLEN] = 0;
cached_lstat_info = &mcfs_info->current->my_stat;
mcfs_info->current = mcfs_info->current->next;
compute_namelen(&mcfs_readdir_data.dent);
return &mcfs_readdir_data;
}
static int mcfs_closedir (void *info)
{
opendir_info *mcfs_info = (opendir_info *) info;
dir_entry *p, *q;
rpc_send (mcfs_info->conn->sock, RPC_INT, MC_CLOSEDIR,
RPC_INT, mcfs_info->handle, RPC_END);
for (p = mcfs_info->entries; p;){
q = p;
p = p->next;
g_free (q->text);
g_free (q);
}
g_free (info);
return 0;
}
static time_t mcfs_get_time (mcfs_connection *mc)
{
int sock = mc->sock;
if (mc->version == 1) {
struct tm tt;
rpc_get (sock,
RPC_INT, &tt.tm_sec,
RPC_INT, &tt.tm_min,
RPC_INT, &tt.tm_hour,
RPC_INT, &tt.tm_mday,
RPC_INT, &tt.tm_year,
RPC_INT, &tt.tm_mon,
RPC_END);
tt.tm_year -= 1900;
tt.tm_isdst = 0;
return mktime (&tt);
} else {
char *buf;
long tm;
rpc_get (sock,
RPC_STRING, &buf,
RPC_END);
sscanf (buf, "%lx", &tm);
g_free (buf);
return (time_t) tm;
}
}
static int get_stat_info (mcfs_connection *mc, struct stat *buf)
{
long mylong;
int sock = mc->sock;
buf->st_dev = 0;
rpc_get (sock, RPC_INT, &mylong, RPC_END);
#ifdef HAVE_ST_RDEV
buf->st_rdev = mylong;
#endif
rpc_get (sock, RPC_INT, &mylong, RPC_END);
buf->st_ino = mylong;
rpc_get (sock, RPC_INT, &mylong, RPC_END);
buf->st_mode = mylong;
rpc_get (sock, RPC_INT, &mylong, RPC_END);
buf->st_nlink = mylong;
rpc_get (sock, RPC_INT, &mylong, RPC_END);
buf->st_uid = mylong;
rpc_get (sock, RPC_INT, &mylong, RPC_END);
buf->st_gid = mylong;
rpc_get (sock, RPC_INT, &mylong, RPC_END);
buf->st_size = mylong;
if (!rpc_get (sock, RPC_INT, &mylong, RPC_END))
return 0;
#ifdef HAVE_ST_BLOCKS
buf->st_blocks = mylong;
#endif
buf->st_atime = mcfs_get_time (mc);
buf->st_mtime = mcfs_get_time (mc);
buf->st_ctime = mcfs_get_time (mc);
return 1;
}
static int mcfs_stat_cmd (int cmd, char *path, struct stat *buf)
{
char *remote_file;
mcfs_connection *mc;
int status, error;
if ((remote_file = mcfs_get_path (&mc, path)) == 0)
return -1;
rpc_send (mc->sock, RPC_INT, cmd, RPC_STRING, remote_file, RPC_END);
g_free (remote_file);
if (!rpc_get (mc->sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
return the_error (-1, errno);
if (is_error (status, error))
return -1;
if (get_stat_info (mc, buf))
return 0;
else
return the_error (-1, EIO);
}
static int mcfs_stat (vfs *me, char *path, struct stat *buf)
{
return mcfs_stat_cmd (MC_STAT, path, buf);
}
static int mcfs_lstat (vfs *me, char *path, struct stat *buf)
{
int path_len = strlen (path);
int entry_len = strlen (mcfs_readdir_data.dent.d_name);
/* Hack ... */
if (strcmp (path + path_len - entry_len,
mcfs_readdir_data.dent.d_name) == 0 &&
cached_lstat_info){
*buf = *cached_lstat_info;
return 0;
}
return mcfs_stat_cmd (MC_LSTAT, path, buf);
}
static int mcfs_fstat (void *data, struct stat *buf)
{
mcfs_handle *info = (mcfs_handle *) data;
int result, error;
int handle, sock;
sock = info->conn->sock;
handle = info->handle;
rpc_send (sock, RPC_INT, MC_FSTAT, RPC_INT, handle, RPC_END);
if (!rpc_get (sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
return the_error (-1, EIO);
if (is_error (result, error))
return -1;
if (get_stat_info (info->conn, buf))
return 0;
else
return the_error (-1, EIO);
}
static int mcfs_chmod (vfs *me, char *path, int mode)
{
return mcfs_rpc_path_int (MC_CHMOD, path, mode);
}
static int mcfs_chown (vfs *me, char *path, int owner, int group)
{
return mcfs_rpc_path_int_int (MC_CHOWN, path, owner, group);
}
static int mcfs_utime (vfs *me, char *path, struct utimbuf *times)
{
mcfs_connection *mc;
int status;
char *file;
if (!(file = mcfs_get_path (&mc, path)))
return -1;
status = 0;
if (mc->version >= 2) {
char abuf[BUF_SMALL];
char mbuf[BUF_SMALL];
long atime, mtime;
atime = (long) times->actime;
mtime = (long) times->modtime;
g_snprintf (abuf, sizeof(abuf), "%lx", atime);
g_snprintf (mbuf, sizeof(mbuf), "%lx", mtime);
rpc_send (mc->sock, RPC_INT, MC_UTIME,
RPC_STRING, file,
RPC_STRING, abuf,
RPC_STRING, mbuf,
RPC_END);
status = mcfs_handle_simple_error (mc->sock, 0);
}
g_free (file);
return (status);
}
static int mcfs_readlink (vfs *me, char *path, char *buf, int size)
{
char *remote_file, *stat_str;
int status, error;
mcfs_connection *mc;
if (!(remote_file = mcfs_get_path (&mc, path)))
return -1;
rpc_send (mc->sock, RPC_INT, MC_READLINK, RPC_STRING, remote_file, RPC_END);
g_free (remote_file);
if (!rpc_get (mc->sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
return the_error (-1, EIO);
if (is_error (status, errno))
return -1;
if (!rpc_get (mc->sock, RPC_STRING, &stat_str, RPC_END))
return the_error (-1, EIO);
strncpy (buf, stat_str, size);
g_free (stat_str);
return strlen (buf);
}
static int mcfs_unlink (vfs *me, char *path)
{
return mcfs_rpc_path (MC_UNLINK, path);
}
static int mcfs_symlink (vfs *me, char *n1, char *n2)
{
return mcfs_rpc_two_paths (MC_SYMLINK, n1, n2);
}
static int mcfs_rename (vfs *me, char *a, char *b)
{
return mcfs_rpc_two_paths (MC_RENAME, a, b);
}
static int mcfs_chdir (vfs *me, char *path)
{
char *remote_dir;
mcfs_connection *mc;
int status, error;
if (!(remote_dir = mcfs_get_path (&mc, path)))
return -1;
rpc_send (mc->sock, RPC_INT, MC_CHDIR, RPC_STRING, remote_dir, RPC_END);
g_free (remote_dir);
if (!rpc_get (mc->sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
return the_error (-1, EIO);
if (is_error (status, error))
return -1;
return 0;
}
static int mcfs_lseek (void *data, off_t offset, int whence)
{
mcfs_handle *info = (mcfs_handle *) data;
int handle, sock;
sock = info->conn->sock;
handle = info->handle;
rpc_send (sock,
RPC_INT, MC_LSEEK,
RPC_INT, handle,
RPC_INT, offset,
RPC_INT, whence,
RPC_END);
return mcfs_handle_simple_error (sock, 1);
}
static int mcfs_mknod (vfs *me, char *path, int mode, int dev)
{
return mcfs_rpc_path_int_int (MC_MKNOD, path, mode, dev);
}
static int mcfs_mkdir (vfs *me, char *path, mode_t mode)
{
return mcfs_rpc_path_int (MC_MKDIR, path, mode);
}
static int mcfs_rmdir (vfs *me, char *path)
{
return mcfs_rpc_path (MC_RMDIR, path);
}
static int mcfs_link (vfs *me, char *p1, char *p2)
{
return mcfs_rpc_two_paths (MC_LINK, p1, p2);
}
/* We do not free anything right now: we free resources when we run
* out of them
*/
static vfsid mcfs_getid (vfs *me, char *p, struct vfs_stamping **parent)
{
*parent = NULL;
return (vfsid) -1;
}
static int mcfs_nothingisopen (vfsid id)
{
return 0;
}
static void mcfs_free (vfsid id)
{
/* FIXME: Should not be empty */
}
/* Gives up on a socket and reopnes the connection, the child own the socket
* now
*/
static void
my_forget (char *path)
{
char *host, *user, *pass, *p;
int port, i, vers;
if (strncmp (path, "/#mc:", 5))
return;
path += 5;
if (path[0] == '/' && path[1] == '/')
path += 2;
if ((p = mcfs_get_host_and_username (path, &host, &user, &port, &pass)) == 0) {
g_free (host);
g_free (user);
if (pass)
wipe_password (pass);
return;
}
for (i = 0; i < MCFS_MAX_CONNECTIONS; i++){
if ((strcmp (host, mcfs_connections [i].host) == 0) &&
(strcmp (user, mcfs_connections [i].user) == 0) &&
(port == mcfs_connections [i].port)){
/* close socket: the child owns it now */
close (mcfs_connections [i].sock);
/* reopen the connection */
mcfs_connections [i].sock = mcfs_open_tcp_link (host, user, &port, pass, &vers);
}
}
g_free (p);
g_free (host);
g_free (user);
if (pass)
wipe_password (pass);
}
static int
mcfs_setctl (vfs *me, char *path, int ctlop, char *arg)
{
switch (ctlop) {
case MCCTL_FORGET_ABOUT:
my_forget(path);
return 0;
}
return 0;
}
vfs vfs_mcfs_ops = {
NULL, /* This is place of next pointer */
"mcfs",
F_NET, /* flags */
"mc:", /* prefix */
NULL, /* data */
0, /* errno */
NULL,
NULL,
mcfs_fill_names,
NULL,
mcfs_open,
mcfs_close,
mcfs_read,
mcfs_write,
mcfs_opendir,
mcfs_readdir,
mcfs_closedir,
NULL,
NULL,
mcfs_stat,
mcfs_lstat,
mcfs_fstat,
mcfs_chmod,
mcfs_chown,
mcfs_utime,
mcfs_readlink,
mcfs_symlink,
mcfs_link,
mcfs_unlink,
mcfs_rename,
mcfs_chdir,
mcfs_errno,
mcfs_lseek,
mcfs_mknod,
mcfs_getid,
mcfs_nothingisopen,
mcfs_free,
NULL,
NULL,
mcfs_mkdir,
mcfs_rmdir,
NULL,
mcfs_setctl
MMAPNULL
};
static void mcfs_free_bucket (int bucket)
{
g_free (mcfs_connections [bucket].host);
g_free (mcfs_connections [bucket].user);
g_free (mcfs_connections [bucket].home);
/* Set all the fields to zero */
mcfs_connections [bucket].host =
mcfs_connections [bucket].user =
mcfs_connections [bucket].home = 0;
mcfs_connections [bucket].sock =
mcfs_connections [bucket].version = 0;
}
static int mcfs_invalidate_socket (int sock)
{
int i, j = -1;
extern int mc_chdir (char *);
for (i = 0; i < MCFS_MAX_CONNECTIONS; i++)
if (mcfs_connections [i].sock == sock) {
mcfs_free_bucket (i);
j = 0;
}
if (j == -1)
return -1; /* It was not our sock */
/* Break from any possible loop */
mc_chdir ("/");
return 0;
}
void tcp_invalidate_socket (int sock)
{
mcfs_invalidate_socket (sock);
}
#endif /* WITH_MCFS */
Reference in New Issue View Git Blame Copy Permalink