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- /* Virtual File System: Midnight Commander file system.
-
- Copyright (C) 1995 Miguel de Icaza
-
- 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. */
-
- #include <config.h>
- #include <stdio.h>
- #include <errno.h>
- #include <string.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <stdarg.h>
- #include <fcntl.h>
- #include <pwd.h>
- #include "../src/fs.h"
- #include "../src/mad.h"
- #include <netdb.h> /* struct hostent */
- #include <sys/socket.h> /* AF_INET */
- #include <netinet/in.h> /* struct in_addr */
- #include <arpa/inet.h>
- #include <time.h>
-
- #ifdef USE_TERMNET
- #include <termnet.h>
- #endif
-
- #include "../src/mem.h"
- #include "vfs.h"
- #include "mcfs.h"
- #include "tcputil.h"
- #include "../src/util.h"
- #include "../src/dialog.h"
-
- #define MCFS_MAX_CONNECTIONS 32
- #define mcserver_port 9876
-
- static int mcfs_errno_var;
- static int current_dir_sock;
-
- char *mcfs_current_dir = 0;
-
- /* Extract the hostname and username from the path */
- /* path is in the form: hostname:user/remote-dir */
- char *mcfs_get_host_and_username (char *path, char **host, char **user,
- int *port, char **pass)
- {
- return get_host_and_username (path, host, user, port, 0, 0, pass);
- }
-
- static mcfs_open_connections = 0;
- struct {
- char *host;
- char *user;
- int sock;
- int port;
- } mcfs_connections [MCFS_MAX_CONNECTIONS];
-
- void mcfs_fill_names (void (*func)(char *))
- {
- int i;
- char *name;
-
- for (i = 0; i < MCFS_MAX_CONNECTIONS; i++){
- if (mcfs_connections [i].host == 0)
- continue;
- name = copy_strings ("mc:", mcfs_connections [i].user,
- "@", mcfs_connections [i].host, 0);
- (*func) (name);
- free (name);
- }
- }
-
- void mcfs_free_bucket (int bucket)
- {
- free (mcfs_connections [bucket].host);
- free (mcfs_connections [bucket].user);
-
- /* Set all the fields to zero */
- mcfs_connections [bucket].host =
- mcfs_connections [bucket].user = 0;
- mcfs_connections [bucket].sock = 0;
- }
-
- /* FIXME: This part should go to another c module, perhaps tcp.c */
- int mcfs_invalidate_socket (int);
-
- void tcp_invalidate_socket (int sock)
- {
- mcfs_invalidate_socket (sock);
- }
- /* FIXME end: 'cause it is used not only by mcfs */
-
- 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;
- }
-
- extern char *last_current_dir;
-
- /* 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 result;
- char *pass;
-
- /* Send the version number */
- rpc_send (my_socket, RPC_INT, 1, RPC_END);
-
- if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
- return 0;
-
- if (result != MC_VERSION_OK){
- message (1, " MCFS ", " The server does not support this version ");
- close (my_socket);
- return 0;
- }
-
- rpc_send (my_socket, RPC_INT, MC_LOGIN, RPC_STRING, last_current_dir,
- 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 = strdup (netrcpass);
- else
- pass = input_dialog (" MCFS Password required ", "Password:", "");
- 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 (1, " MCFS ", " Invalid password ");
- close (my_socket);
- rpc_send (my_socket, RPC_INT, MC_QUIT, RPC_END);
- return 0;
- }
- }
- return my_socket;
- }
-
- static int mcfs_open_tcp_link (char *host, char *user,
- int *port, char *netrcpass)
- {
- int my_socket;
- int old_port = *port;
-
- my_socket = open_tcp_link (host, port, " 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);
- }
-
- static int mcfs_get_free_bucket_init = 1;
- static int mcfs_get_free_bucket ()
- {
- 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 i;
- }
- /* This can't happend, since we have checked for max connections before */
- fprintf (stderr, "Internal error: mcfs_get_free_bucket");
- return -1;
- }
-
- /* This routine keeps track of open connections */
- /* Returns a connected socket to host */
- static int mcfs_open_link (char *host, char *user, int *port, char *netrcpass)
- {
- int i, bucket, sock;
-
- /* 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].sock;
- }
- if (mcfs_open_connections == MCFS_MAX_CONNECTIONS){
- message (1, " Error ", " Too many open connections ");
- return 0;
- }
-
- if (!(sock = mcfs_open_tcp_link (host, user, port, netrcpass)))
- return 0;
-
- bucket = mcfs_get_free_bucket ();
- mcfs_open_connections++;
- mcfs_connections [bucket].host = strdup (host);
- mcfs_connections [bucket].user = strdup (user);
- mcfs_connections [bucket].port = *port;
- mcfs_connections [bucket].sock = sock;
-
- return sock;
- }
-
- static int is_error (int result, int errno_num)
- {
- if (!(result == -1))
- return mcfs_errno_var = 0;
- else
- mcfs_errno_var = errno_num;
- return 1;
- }
-
- static int the_error (int result, int errno_num)
- {
- if (result == -1)
- mcfs_errno_var = errno_num;
- else
- mcfs_errno_var = 0;
- return result;
- }
-
- static char *mcfs_get_path (int *sock, char *path)
- {
- char *user, *host, *remote_path;
- char *pass;
- static int last_sock;
- int port;
-
- /* An absolute path name, try to determine connection socket */
- if (strncmp (path, "mc:", 3) == 0){
- path += 3;
-
- /* 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)))
- return 0;
-
- if (!(*sock = mcfs_open_link (host, user, &port, pass))){
- free (host);
- free (user);
- if (pass)
- wipe_password (pass);
- return 0;
- }
- if (pass)
- wipe_password (pass);
- last_sock = *sock;
- return remote_path;
- }
- *sock = current_dir_sock;
-
- return 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)
- {
- int sock;
- char *r1, *r2;
-
- if ((r1 = mcfs_get_path (&sock, s1)) == 0)
- return -1;
-
- if ((r2 = mcfs_get_path (&sock, s2)) == 0)
- return -1;
-
- rpc_send (sock,
- RPC_INT, command,
- RPC_STRING, r1,
- RPC_STRING, r2,
- RPC_END);
-
- return mcfs_handle_simple_error (sock, 0);
- }
-
- static int mcfs_rpc_path (int command, char *path)
- {
- int sock;
- char *remote_file;
-
- if ((remote_file = mcfs_get_path (&sock, path)) == 0)
- return -1;
-
- rpc_send (sock,
- RPC_INT, command,
- RPC_STRING, remote_file,
- RPC_END);
- return mcfs_handle_simple_error (sock, 0);
- }
-
- static int mcfs_rpc_path_int (int command, char *path, int data)
- {
- int sock;
- char *remote_file;
-
- if ((remote_file = mcfs_get_path (&sock, path)) == 0)
- return -1;
-
- rpc_send (sock,
- RPC_INT, command,
- RPC_STRING, remote_file,
- RPC_INT, data, RPC_END);
-
- return mcfs_handle_simple_error (sock, 0);
- }
-
- static int mcfs_rpc_path_int_int (int command, char *path, int n1, int n2)
- {
- int sock;
- char *remote_file;
-
- if ((remote_file = mcfs_get_path (&sock, path)) == 0)
- return -1;
-
- rpc_send (sock,
- RPC_INT, command,
- RPC_STRING, remote_file,
- RPC_INT, n1,
- RPC_INT, n2,
- RPC_END);
-
- return mcfs_handle_simple_error (sock, 0);
- }
-
- char *mcfs_gethome (char *servername)
- {
- char *remote_file;
- int sock;
- char *buffer;
-
- if (!(remote_file = mcfs_get_path (&sock, servername)))
- return 0;
- free (remote_file);
- rpc_send (sock, RPC_INT, MC_GETHOME, RPC_END);
- if (0 == rpc_get (sock, RPC_STRING, &buffer, RPC_END)) {
- return strdup ("/");
- }
- return buffer;
- }
-
- char *mcfs_getupdir (char *servername)
- {
- char *remote_file;
- int sock;
- char *buffer;
-
- if (!(remote_file = mcfs_get_path (&sock, servername)))
- return 0;
- free (remote_file);
- rpc_send (sock, RPC_INT, MC_GETUPDIR, RPC_END);
- if (0 == rpc_get (sock, RPC_STRING, &buffer, RPC_END)) {
- return strdup ("/");
- }
- return buffer;
- }
-
- /* The callbacks */
- static void *mcfs_open (char *file, int flags, int mode)
- {
- char *remote_file;
- int sock, result, error_num;
- int *remote_handle;
-
- if (!(remote_file = mcfs_get_path (&sock, file)))
- return 0;
-
- rpc_send (sock, RPC_INT, MC_OPEN, RPC_STRING, remote_file,
- RPC_INT, flags, RPC_INT, mode, RPC_END);
-
- if (0 == rpc_get (sock, RPC_INT, &result, RPC_INT, &error_num, RPC_END))
- return 0;
-
- if (is_error (result, error_num))
- return 0;
-
- remote_handle = (int *) xmalloc (2 * sizeof (int), "int");
- remote_handle [0] = result;
- remote_handle [1] = sock;
-
- return remote_handle;
- }
-
- static int mcfs_read (void *data, char *buffer, int count)
- {
- int *info = (int *) data;
- int result, error;
- int handle, sock;
-
- sock = info [1];
- handle = info [0];
-
- rpc_send (sock, RPC_INT, MC_READ, RPC_INT, handle,
- RPC_INT, count, RPC_END);
-
- if (0 == rpc_get (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 (sock, RPC_BLOCK, result, buffer, RPC_END))
- return the_error (-1, EIO);
-
- return result;
- }
-
- int mcfs_write (void *data, char *buf, int nbyte)
- {
- int *info = (int *) data;
- int handle, sock;
-
- sock = info [1];
- handle = info [0];
-
- rpc_send (sock,
- RPC_INT, MC_WRITE,
- RPC_INT, handle,
- RPC_INT, nbyte,
- RPC_BLOCK, nbyte, buf,
- RPC_END);
-
- return mcfs_handle_simple_error (sock, 1);
- }
-
- static int mcfs_close (void *data)
- {
- int *info = (int *) data;
- int handle, sock, result, error;
-
- if (!data)
- return -1;
-
- handle = info [0];
- sock = info [1];
-
- rpc_send (sock, RPC_INT, MC_CLOSE, RPC_INT, handle, RPC_END);
-
- if (0 == rpc_get (sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
- return the_error (-1, EIO);
-
- is_error (result, error);
-
- free (data);
- return result;
- }
-
- static int mcfs_errno (void)
- {
- return mcfs_errno_var;
- }
-
- typedef struct dir_entry {
- char *text;
- struct dir_entry *next;
- struct stat my_stat;
- int merrno;
- } dir_entry;
-
- typedef struct {
- int link;
- int handle;
- dir_entry *entries;
- dir_entry *current;
- } opendir_info;
-
- static void *mcfs_opendir (char *dirname)
- {
- opendir_info *mcfs_info;
- int link, handle, error_num;
- char *remote_dir;
- int result;
-
- if (!(remote_dir = mcfs_get_path (&link, dirname)))
- return 0;
-
- rpc_send (link, RPC_INT, MC_OPENDIR, RPC_STRING, remote_dir, RPC_END);
-
- if (0 == rpc_get (link, RPC_INT, &result, RPC_INT, &error_num, RPC_END))
- return 0;
-
- if (is_error (result, error_num))
- return 0;
-
- handle = result;
-
- mcfs_info = (opendir_info *) xmalloc (sizeof(opendir_info),"mcfs_opendir");
- mcfs_info->link = link;
- mcfs_info->handle = handle;
- mcfs_info->entries = 0;
- mcfs_info->current = 0;
-
- return mcfs_info;
- }
-
- static int get_stat_info (int sock, struct stat *buf);
-
- static int mcfs_loaddir (opendir_info *mcfs_info)
- {
- int status, error;
- int link = mcfs_info->link;
- 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 = xmalloc (sizeof (dir_entry), "mcfs_loaddir");
- new_entry->text = xmalloc (entry_len + 1, "mcfs_loaddir");
- new_entry->text [entry_len] = 0;
-
- 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 (link, &(new_entry->my_stat)))
- return 0;
- }
- }
- mcfs_info->current = mcfs_info->entries;
-
- return 1;
- }
-
- void mcfs_free_dir (dir_entry *de)
- {
- if (!de)
- return;
- mcfs_free_dir (de->next);
- free (de->text);
- free (de);
- }
-
- /* 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.
- */
- static struct {
- struct dirent dent;
- #ifdef NEED_EXTRA_DIRENT_BUFFER
- char extra_buffer [MC_MAXPATHLEN];
- #endif
- } 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 [0]);
- strcpy (dirent_dest, mcfs_info->current->text);
- cached_lstat_info = &mcfs_info->current->my_stat;
- mcfs_info->current = mcfs_info->current->next;
-
- #ifndef DIRENT_LENGTH_COMPUTED
- mcfs_readdir_data.dent.d_namlen = strlen (mcfs_readdir_data.dent.d_name);
- #endif
-
- 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->link, RPC_INT, MC_CLOSEDIR,
- RPC_INT, mcfs_info->handle, RPC_END);
-
- for (p = mcfs_info->entries; p;){
- q = p;
- p = p->next;
- free (q->text);
- free (q);
- }
- free (info);
- return 0;
- }
-
- static time_t mcfs_get_time (int sock)
- {
- 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);
- }
-
- static int get_stat_info (int sock, struct stat *buf)
- {
- long mylong;
-
- #ifdef HAVE_ST_RDEV
- buf->st_rdev = 0;
- #endif
-
- rpc_get (sock, RPC_INT, &mylong, RPC_END);
- buf->st_dev = mylong;
- 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 (sock);
- buf->st_mtime = mcfs_get_time (sock);
- buf->st_ctime = mcfs_get_time (sock);
- return 1;
- }
-
- static int mcfs_stat_cmd (int cmd, char *path, struct stat *buf)
- {
- char *remote_file;
- int sock;
- int status, error;
-
- if ((remote_file = mcfs_get_path (&sock, path)) == 0)
- return -1;
-
- rpc_send (sock, RPC_INT, cmd, RPC_STRING, remote_file, RPC_END);
- if (!rpc_get (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 (sock, buf))
- return 0;
- else
- return the_error (-1, EIO);
- }
-
- static int mcfs_stat (char *path, struct stat *buf)
- {
- return mcfs_stat_cmd (MC_STAT, path, buf);
- }
-
- static int mcfs_lstat (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);
- }
-
- int mcfs_fstat (void *data, struct stat *buf)
- {
- int *info = (int *) data;
- int result, error;
- int handle, sock;
-
- sock = info [1];
- handle = info [0];
-
- 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 (sock, buf))
- return 0;
- else
- return the_error (-1, EIO);
- }
-
- int mcfs_chmod (char *path, int mode)
- {
- return mcfs_rpc_path_int (MC_CHMOD, path, mode);
- }
-
- int mcfs_chown (char *path, int owner, int group)
- {
- return mcfs_rpc_path_int_int (MC_CHOWN, path, owner, group);
- }
-
- static int mcfs_readlink (char *path, char *buf, int size)
- {
- char *remote_file, *stat_str;
- int status, error;
- int sock;
-
- if (!(remote_file = mcfs_get_path (&sock, path)))
- return -1;
-
- rpc_send (sock, RPC_INT, MC_READLINK, RPC_STRING, remote_file, RPC_END);
- if (!rpc_get (sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
- return the_error (-1, EIO);
-
- if (is_error (status, errno))
- return -1;
-
- if (!rpc_get (sock, RPC_STRING, &stat_str, RPC_END))
- return the_error (-1, EIO);
-
- strncpy (buf, stat_str, size);
- free (stat_str);
- return strlen (buf);
- }
-
- int mcfs_unlink (char *path)
- {
- return mcfs_rpc_path (MC_UNLINK, path);
- }
-
- int mcfs_symlink (char *n1, char *n2)
- {
- return mcfs_rpc_two_paths (MC_SYMLINK, n1, n2);
- }
-
- int mcfs_rename (char *a, char *b)
- {
- return mcfs_rpc_two_paths (MC_RENAME, a, b);
- }
-
- static int mcfs_chdir (char *path)
- {
- char *remote_dir;
- int sock, status, error;
-
- if (!(remote_dir = mcfs_get_path (&sock, path)))
- return -1;
-
- if (mcfs_current_dir)
- free (mcfs_current_dir);
-
- mcfs_current_dir = strdup (path);
-
- current_dir_sock = sock;
- rpc_send (sock, RPC_INT, MC_CHDIR, RPC_STRING, remote_dir, RPC_END);
- if (!rpc_get (sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
- return the_error (-1, EIO);
-
- if (is_error (status, error))
- return -1;
- return 0;
- }
-
- int mcfs_lseek (void *data, off_t offset, int whence)
- {
- int *info = (int *) data;
- int handle, sock;
-
- sock = info [1];
- handle = info [0];
-
- 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);
- }
-
- int mcfs_mknod (char *path, int mode, int dev)
- {
- return mcfs_rpc_path_int_int (MC_MKNOD, path, mode, dev);
- }
-
- int mcfs_mkdir (char *path, mode_t mode)
- {
- return mcfs_rpc_path_int (MC_MKDIR, path, mode);
- }
-
- int mcfs_rmdir (char *path)
- {
- return mcfs_rpc_path (MC_RMDIR, path);
- }
-
- int mcfs_link (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 (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 */
- }
-
- static char *mcfs_getlocalcopy (char *path)
- {
- return mc_def_getlocalcopy (path);
- }
-
- static void mcfs_ungetlocalcopy (char *path, char *local, int has_changed)
- {
- mc_def_ungetlocalcopy (path, local, has_changed);
- }
-
- #ifdef HAVE_MMAP
- caddr_t mcfs_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 mcfs_munmap (caddr_t addr, size_t len, void *data)
- {
- return -1;
- }
- #endif
-
- vfs mcfs_vfs_ops = {
- mcfs_open,
- mcfs_close,
- mcfs_read,
- mcfs_write,
-
- mcfs_opendir,
- mcfs_readdir,
- mcfs_closedir,
-
- mcfs_stat,
- mcfs_lstat,
- mcfs_fstat,
-
- mcfs_chmod,
- mcfs_chown,
-
- mcfs_readlink,
- mcfs_symlink,
- mcfs_link,
- mcfs_unlink,
-
- mcfs_rename,
- mcfs_chdir,
- mcfs_errno,
- mcfs_lseek,
- mcfs_mknod,
-
- mcfs_getid,
- mcfs_nothingisopen,
- mcfs_free,
-
- mcfs_getlocalcopy,
- mcfs_ungetlocalcopy,
-
- mcfs_mkdir,
- mcfs_rmdir,
- NULL,
- NULL
- #ifdef HAVE_MMAP
- , mcfs_mmap,
- mcfs_munmap
- #endif
- };
-
-