vfs/mcfs.c

   1 /* Virtual File System: Midnight Commander file system.
   2
   3    Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
   4    2004, 2005, 2007 Free Software Foundation, Inc.
   5
   6    Written by Miguel de Icaza
   7               Andrej Borsenkow
   8               Norbert Warmuth
   9
  10    This program is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Library General Public License
  12    as published by the Free Software Foundation; either version 2 of
  13    the License, or (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU Library General Public License for more details.
  19
  20    You should have received a copy of the GNU Library General Public
  21    License along with this program; if not, write to the Free Software
  22    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  23
  24 /* Namespace: exports mcfs_vfs_ops, tcp_invalidate_socket */
  25
  26 #include <config.h>
  27
  28 #ifdef WITH_MCFS
  29 #include <stdio.h>
  30 #include <errno.h>
  31 #include <string.h>
  32 #include <unistd.h>
  33 #include <stdlib.h>
  34 #include <stdarg.h>
  35 #include <pwd.h>
  36 #include <sys/types.h>          /* POSIX-required by sys/socket.h and netdb.h */
  37 #include <netdb.h>              /* struct hostent */
  38 #include <sys/socket.h>         /* AF_INET */
  39 #include <netinet/in.h>         /* struct in_addr */
  40 #ifdef HAVE_ARPA_INET_H
  41 #include <arpa/inet.h>
  42 #endif
  43
  44 #ifdef HAVE_PMAP_SET
  45 #include <rpc/rpc.h>
  46 #include <rpc/pmap_prot.h>
  47 #ifdef HAVE_RPC_PMAP_CLNT_H
  48 #include <rpc/pmap_clnt.h>
  49 #endif
  50 #endif
  51
  52 #include "../src/global.h"
  53 #include "../src/tty.h"         /* enable/disable interrupt key */
  54 #include "../src/wtools.h"      /* message() */
  55 #include "../src/main.h"        /* print_vfs_message */
  56 #include "utilvfs.h"
  57 #include "vfs.h"
  58 #include "vfs-impl.h"
  59 #include "mcfs.h"
  60 #include "mcfsutil.h"
  61 #include "tcputil.h"
  62
  63 #ifndef INADDR_NONE
  64 #  define INADDR_NONE (0xffffffffU)
  65 #endif
  66
  67 #define MCFS_MAX_CONNECTIONS 32
  68
  69 static struct _mcfs_connection {
  70     char *host;
  71     char *user;
  72     char *home;
  73     int sock;
  74     int port;
  75     int version;
  76 } mcfs_connections[MCFS_MAX_CONNECTIONS];
  77
  78
  79 #define mcserver_port 9876
  80
  81 typedef struct _mcfs_connection mcfs_connection;
  82
  83 typedef struct {
  84     int handle;
  85     mcfs_connection *conn;
  86 } mcfs_handle;
  87
  88 static char *mcfs_gethome (mcfs_connection * mc);
  89 static int my_errno;
  90 static struct vfs_class vfs_mcfs_ops;
  91
  92 /* Extract the hostname and username from the path */
  93 /* path is in the form: hostname:user/remote-dir */
  94 static char *
  95 mcfs_get_host_and_username (const char *path, char **host, char **user,
  96                             int *port, char **pass)
  97 {
  98     return vfs_split_url (path, host, user, port, pass, 0, 0);
  99 }
 100
 101 static void
 102 mcfs_fill_names (struct vfs_class *me, fill_names_f func)
 103 {
 104     int i;
 105     char *name;
 106
 107     (void) me;
 108
 109     for (i = 0; i < MCFS_MAX_CONNECTIONS; i++) {
 110         if (mcfs_connections[i].host == 0)
 111             continue;
 112         name = g_strconcat ("/#mc:", mcfs_connections[i].user,
 113                             "@", mcfs_connections[i].host, (char *) NULL);
 114         (*func) (name);
 115         g_free (name);
 116     }
 117 }
 118
 119 /* This routine checks the server RPC version and logs the user in */
 120 static int
 121 mcfs_login_server (int my_socket, char *user, int port,
 122                    int port_autodetected, char *netrcpass, int *version)
 123 {
 124     int result;
 125     char *pass;
 126
 127     /* Send the version number */
 128     rpc_send (my_socket, RPC_INT, *version, RPC_END);
 129     if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
 130         return 0;
 131
 132     if (result != MC_VERSION_OK) {
 133         message (1, _(" MCFS "),
 134                     _(" The server does not support this version "));
 135         close (my_socket);
 136         return 0;
 137     }
 138
 139     /* FIXME: figure out why last_current_dir used to be passed here */
 140     rpc_send (my_socket, RPC_INT, MC_LOGIN, RPC_STRING, "/",
 141               RPC_STRING, user, RPC_END);
 142
 143     if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
 144         return 0;
 145
 146     if (result == MC_NEED_PASSWORD) {
 147         if (port > 1024 && port_autodetected) {
 148             int v;
 149             v = query_dialog (_("Warning"),
 150                               _
 151                               (" The remote server is not running on a system port \n"
 152                                " you need a password to log in, but the information may \n"
 153                                " not be safe on the remote side.  Continue? \n"),
 154                               3, 2, _("&Yes"), _("&No"));
 155
 156             if (v == 1) {
 157                 close (my_socket);
 158                 return 0;
 159             }
 160         }
 161         if (netrcpass != NULL)
 162             pass = g_strdup (netrcpass);
 163         else
 164             pass = vfs_get_password (_(" MCFS Password required "));
 165         if (!pass) {
 166             rpc_send (my_socket, RPC_INT, MC_QUIT, RPC_END);
 167             close (my_socket);
 168             return 0;
 169         }
 170         rpc_send (my_socket, RPC_INT, MC_PASS, RPC_STRING, pass, RPC_END);
 171
 172         wipe_password (pass);
 173
 174         if (0 == rpc_get (my_socket, RPC_INT, &result, RPC_END))
 175             return 0;
 176
 177         if (result != MC_LOGINOK) {
 178             message (1, _(" MCFS "), _(" Invalid password "));
 179             rpc_send (my_socket, RPC_INT, MC_QUIT, RPC_END);
 180             close (my_socket);
 181             return 0;
 182         }
 183     }
 184     return my_socket;
 185 }
 186
 187 static int
 188 mcfs_get_remote_port (struct sockaddr_in *sin, int *version)
 189 {
 190 #ifdef HAVE_PMAP_GETMAPS
 191     int port;
 192     struct pmaplist *pl;
 193
 194     *version = 1;
 195     port = mcserver_port;
 196     for (pl = pmap_getmaps (sin); pl; pl = pl->pml_next)
 197         if (pl->pml_map.pm_prog == RPC_PROGNUM
 198             && pl->pml_map.pm_prot == IPPROTO_TCP
 199             && pl->pml_map.pm_vers >= (unsigned long) *version) {
 200             *version = (int) pl->pml_map.pm_vers;
 201             port = pl->pml_map.pm_port;
 202         }
 203     return port;
 204 #else
 205 #ifdef HAVE_PMAP_GETPORT
 206     int port;
 207     for (*version = RPC_PROGVER; *version >= 1; (*version)--)
 208         if (port = pmap_getport (sin, RPC_PROGNUM, *version, IPPROTO_TCP))
 209             return port;
 210 #endif                          /* HAVE_PMAP_GETPORT */
 211     *version = 1;
 212     return mcserver_port;
 213 #endif                          /* HAVE_PMAP_GETMAPS */
 214 }
 215
 216 /* This used to be in utilvfs.c, but as it deals with portmapper, it
 217    is probably useful for mcfs */
 218 static int
 219 mcfs_create_tcp_link (const char *host, int *port, int *version, const char *caller)
 220 {
 221     struct sockaddr_in server_address;
 222     unsigned long inaddr;
 223     struct hostent *hp;
 224     int my_socket;
 225
 226     if (!*host)
 227         return 0;
 228
 229     memset ((char *) &server_address, 0, sizeof (server_address));
 230     server_address.sin_family = AF_INET;
 231
 232     /*  Try to use the dotted decimal number */
 233     if ((inaddr = inet_addr (host)) != INADDR_NONE)
 234         memcpy ((char *) &server_address.sin_addr, (char *) &inaddr,
 235                 sizeof (inaddr));
 236     else {
 237         if ((hp = gethostbyname (host)) == NULL) {
 238             message (1, caller, _(" Cannot locate hostname: %s "),
 239                         host);
 240             return 0;
 241         }
 242         memcpy ((char *) &server_address.sin_addr, (char *) hp->h_addr,
 243                 hp->h_length);
 244     }
 245
 246     /* Try to contact a remote portmapper to obtain the listening port */
 247     if (*port == 0) {
 248         *port = mcfs_get_remote_port (&server_address, version);
 249         if (*port < 1)
 250             return 0;
 251     } else
 252         *version = 1;
 253
 254     server_address.sin_port = htons (*port);
 255
 256     if ((my_socket = socket (AF_INET, SOCK_STREAM, 0)) < 0) {
 257         message (1, caller, _(" Cannot create socket: %s "),
 258                     unix_error_string (errno));
 259         return 0;
 260     }
 261     if (connect (my_socket, (struct sockaddr *) &server_address,
 262                  sizeof (server_address)) < 0) {
 263         message (1, caller, _(" Cannot connect to server: %s "),
 264                     unix_error_string (errno));
 265         close (my_socket);
 266         return 0;
 267     }
 268     return my_socket;
 269 }
 270
 271 static int
 272 mcfs_open_tcp_link (char *host, char *user,
 273                     int *port, char *netrcpass, int *version)
 274 {
 275     int my_socket;
 276     int old_port = *port;
 277
 278     my_socket = mcfs_create_tcp_link (host, port, version, " MCfs ");
 279     if (my_socket <= 0)
 280         return 0;
 281
 282     /* We got the connection to the server, verify if the server
 283        implements our version of the RPC mechanism and then login
 284        the user.
 285      */
 286     return mcfs_login_server (my_socket, user, *port, old_port == 0,
 287                               netrcpass, version);
 288 }
 289
 290 static int mcfs_get_free_bucket_init = 1;
 291 static mcfs_connection *
 292 mcfs_get_free_bucket (void)
 293 {
 294     int i;
 295
 296     if (mcfs_get_free_bucket_init) {
 297         mcfs_get_free_bucket_init = 0;
 298         for (i = 0; i < MCFS_MAX_CONNECTIONS; i++)
 299             mcfs_connections[i].host = 0;
 300     }
 301     for (i = 0; i < MCFS_MAX_CONNECTIONS; i++) {
 302         if (!mcfs_connections[i].host)
 303             return &mcfs_connections[i];
 304     }
 305     /* This can't happend, since we have checked for max connections before */
 306     vfs_die ("Internal error: mcfs_get_free_bucket");
 307     return 0;                   /* shut up, stupid gcc */
 308 }
 309
 310 /* This routine keeps track of open connections */
 311 /* Returns a connected socket to host */
 312 static mcfs_connection *
 313 mcfs_open_link (char *host, char *user, int *port, char *netrcpass)
 314 {
 315     static int mcfs_open_connections = 0;
 316     int i, sock, version;
 317     mcfs_connection *bucket;
 318
 319     /* Is the link actually open? */
 320     if (mcfs_get_free_bucket_init) {
 321         mcfs_get_free_bucket_init = 0;
 322         for (i = 0; i < MCFS_MAX_CONNECTIONS; i++)
 323             mcfs_connections[i].host = 0;
 324     } else
 325         for (i = 0; i < MCFS_MAX_CONNECTIONS; i++) {
 326             if (!mcfs_connections[i].host)
 327                 continue;
 328             if ((strcmp (host, mcfs_connections[i].host) == 0) &&
 329                 (strcmp (user, mcfs_connections[i].user) == 0))
 330                 return &mcfs_connections[i];
 331         }
 332     if (mcfs_open_connections == MCFS_MAX_CONNECTIONS) {
 333         message (1, MSG_ERROR, _(" Too many open connections "));
 334         return 0;
 335     }
 336
 337     if (!
 338         (sock =
 339          mcfs_open_tcp_link (host, user, port, netrcpass, &version)))
 340         return 0;
 341
 342     bucket = mcfs_get_free_bucket ();
 343     mcfs_open_connections++;
 344     bucket->host = g_strdup (host);
 345     bucket->user = g_strdup (user);
 346     bucket->home = 0;
 347     bucket->port = *port;
 348     bucket->sock = sock;
 349     bucket->version = version;
 350
 351     return bucket;
 352 }
 353
 354 static int
 355 mcfs_is_error (int result, int errno_num)
 356 {
 357     if (!(result == -1))
 358         return my_errno = 0;
 359     else
 360         my_errno = errno_num;
 361     return 1;
 362 }
 363
 364 static int
 365 mcfs_set_error (int result, int errno_num)
 366 {
 367     if (result == -1)
 368         my_errno = errno_num;
 369     else
 370         my_errno = 0;
 371     return result;
 372 }
 373
 374 static char *
 375 mcfs_get_path (mcfs_connection **mc, const char *path)
 376 {
 377     char *user, *host, *remote_path;
 378     char *pass;
 379     int port;
 380
 381     /* An absolute path name, try to determine connection socket */
 382     if (strncmp (path, "/#mc:", 5))
 383         return NULL;
 384     path += 5;
 385
 386     /* Port = 0 means that mcfs_create_tcp_link will try to contact the
 387      * remote portmapper to get the port number
 388      */
 389     port = 0;
 390     if ((remote_path =
 391          mcfs_get_host_and_username (path, &host, &user, &port, &pass)))
 392         if (!(*mc = mcfs_open_link (host, user, &port, pass))) {
 393             g_free (remote_path);
 394             remote_path = NULL;
 395         }
 396     g_free (host);
 397     g_free (user);
 398     if (pass)
 399         wipe_password (pass);
 400
 401     if (!remote_path)
 402         return NULL;
 403
 404     /* NOTE: tildes are deprecated. See ftpfs.c */
 405     {
 406         int f = !strcmp (remote_path, "/~");
 407         if (f || !strncmp (remote_path, "/~/", 3)) {
 408             char *s;
 409             s = mhl_str_dir_plus_file (mcfs_gethome (*mc),
 410                                      remote_path + 3 - f);
 411             g_free (remote_path);
 412             remote_path = s;
 413         }
 414     }
 415     return remote_path;
 416 }
 417
 418 /* Simple function for routines returning only an integer from the server */
 419 static int
 420 mcfs_handle_simple_error (int sock, int return_status)
 421 {
 422     int status, error;
 423
 424     if (0 == rpc_get (sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
 425         return mcfs_set_error (-1, EIO);
 426
 427     if (mcfs_is_error (status, error))
 428         return -1;
 429     if (return_status)
 430         return status;
 431     return 0;
 432 }
 433
 434 /* Nice wrappers */
 435 static int
 436 mcfs_rpc_two_paths (int command, const char *s1, const char *s2)
 437 {
 438     mcfs_connection *mc;
 439     char *r1, *r2;
 440
 441     if ((r1 = mcfs_get_path (&mc, s1)) == 0)
 442         return -1;
 443
 444     if ((r2 = mcfs_get_path (&mc, s2)) == 0) {
 445         g_free (r1);
 446         return -1;
 447     }
 448
 449     rpc_send (mc->sock,
 450               RPC_INT, command, RPC_STRING, r1, RPC_STRING, r2, RPC_END);
 451     g_free (r1);
 452     g_free (r2);
 453     return mcfs_handle_simple_error (mc->sock, 0);
 454 }
 455
 456 static int
 457 mcfs_rpc_path (int command, const char *path)
 458 {
 459     mcfs_connection *mc;
 460     char *remote_file;
 461
 462     if ((remote_file = mcfs_get_path (&mc, path)) == 0)
 463         return -1;
 464
 465     rpc_send (mc->sock,
 466               RPC_INT, command, RPC_STRING, remote_file, RPC_END);
 467
 468     g_free (remote_file);
 469     return mcfs_handle_simple_error (mc->sock, 0);
 470 }
 471
 472 static int
 473 mcfs_rpc_path_int (int command, const char *path, int data)
 474 {
 475     mcfs_connection *mc;
 476     char *remote_file;
 477
 478     if ((remote_file = mcfs_get_path (&mc, path)) == 0)
 479         return -1;
 480
 481     rpc_send (mc->sock,
 482               RPC_INT, command,
 483               RPC_STRING, remote_file, RPC_INT, data, RPC_END);
 484
 485     g_free (remote_file);
 486     return mcfs_handle_simple_error (mc->sock, 0);
 487 }
 488
 489 static int
 490 mcfs_rpc_path_int_int (int command, const char *path, int n1, int n2)
 491 {
 492     mcfs_connection *mc;
 493     char *remote_file;
 494
 495     if ((remote_file = mcfs_get_path (&mc, path)) == 0)
 496         return -1;
 497
 498     rpc_send (mc->sock,
 499               RPC_INT, command,
 500               RPC_STRING, remote_file, RPC_INT, n1, RPC_INT, n2, RPC_END);
 501
 502     g_free (remote_file);
 503     return mcfs_handle_simple_error (mc->sock, 0);
 504 }
 505
 506 static char *
 507 mcfs_gethome (mcfs_connection *mc)
 508 {
 509     char *buffer;
 510
 511     if (mc->home)
 512         return g_strdup (mc->home);
 513     else {
 514         rpc_send (mc->sock, RPC_INT, MC_GETHOME, RPC_END);
 515         if (0 == rpc_get (mc->sock, RPC_STRING, &buffer, RPC_END))
 516             return g_strdup (PATH_SEP_STR);
 517         mc->home = buffer;
 518         return g_strdup (buffer);
 519     }
 520 }
 521
 522 /* The callbacks */
 523 static void *
 524 mcfs_open (struct vfs_class *me, const char *file, int flags, int mode)
 525 {
 526     char *remote_file;
 527     mcfs_connection *mc;
 528     int result, error_num;
 529     mcfs_handle *remote_handle;
 530
 531     (void) me;
 532
 533     if (!(remote_file = mcfs_get_path (&mc, file)))
 534         return 0;
 535
 536     rpc_send (mc->sock, RPC_INT, MC_OPEN, RPC_STRING, remote_file, RPC_INT,
 537               flags, RPC_INT, mode, RPC_END);
 538     g_free (remote_file);
 539
 540     if (0 ==
 541         rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error_num, RPC_END))
 542         return 0;
 543
 544     if (mcfs_is_error (result, error_num))
 545         return 0;
 546
 547     remote_handle = g_new (mcfs_handle, 2);
 548     remote_handle->handle = result;
 549     remote_handle->conn = mc;
 550
 551     return remote_handle;
 552 }
 553
 554 static int
 555 mcfs_read (void *data, char *buffer, int count)
 556 {
 557     mcfs_handle *info = (mcfs_handle *) data;
 558     int result, error;
 559     int handle;
 560     mcfs_connection *mc;
 561
 562     mc = info->conn;
 563     handle = info->handle;
 564
 565     rpc_send (mc->sock, RPC_INT, MC_READ, RPC_INT, handle,
 566               RPC_INT, count, RPC_END);
 567
 568     if (0 ==
 569         rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
 570         return mcfs_set_error (-1, EIO);
 571
 572     if (mcfs_is_error (result, error))
 573         return 0;
 574
 575     if (0 == rpc_get (mc->sock, RPC_BLOCK, result, buffer, RPC_END))
 576         return mcfs_set_error (-1, EIO);
 577
 578     return result;
 579 }
 580
 581 static int
 582 mcfs_write (void *data, const char *buf, int nbyte)
 583 {
 584     mcfs_handle *info = (mcfs_handle *) data;
 585     mcfs_connection *mc;
 586     int handle;
 587
 588     mc = info->conn;
 589     handle = info->handle;
 590
 591     rpc_send (mc->sock,
 592               RPC_INT, MC_WRITE,
 593               RPC_INT, handle,
 594               RPC_INT, nbyte, RPC_BLOCK, nbyte, buf, RPC_END);
 595
 596     return mcfs_handle_simple_error (mc->sock, 1);
 597 }
 598
 599 static int
 600 mcfs_close (void *data)
 601 {
 602     mcfs_handle *info = (mcfs_handle *) data;
 603     mcfs_connection *mc;
 604     int handle, result, error;
 605
 606     if (!data)
 607         return -1;
 608
 609     handle = info->handle;
 610     mc = info->conn;
 611
 612     rpc_send (mc->sock, RPC_INT, MC_CLOSE, RPC_INT, handle, RPC_END);
 613
 614     if (0 ==
 615         rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
 616         return mcfs_set_error (-1, EIO);
 617
 618     mcfs_is_error (result, error);
 619
 620     g_free (data);
 621     return result;
 622 }
 623
 624 static int
 625 mcfs_errno (struct vfs_class *me)
 626 {
 627     (void) me;
 628
 629     return my_errno;
 630 }
 631
 632 typedef struct dir_entry {
 633     char *text;
 634     struct dir_entry *next;
 635     struct stat my_stat;
 636     int merrno;
 637 } dir_entry;
 638
 639 typedef struct {
 640     mcfs_connection *conn;
 641     int handle;
 642     dir_entry *entries;
 643     dir_entry *current;
 644 } opendir_info;
 645
 646 static void *
 647 mcfs_opendir (struct vfs_class *me, const char *dirname)
 648 {
 649     opendir_info *mcfs_info;
 650     mcfs_connection *mc;
 651     int handle, error_num;
 652     char *remote_dir;
 653     int result;
 654
 655     (void) me;
 656
 657     if (!(remote_dir = mcfs_get_path (&mc, dirname)))
 658         return 0;
 659
 660     rpc_send (mc->sock, RPC_INT, MC_OPENDIR, RPC_STRING, remote_dir,
 661               RPC_END);
 662     g_free (remote_dir);
 663
 664     if (0 ==
 665         rpc_get (mc->sock, RPC_INT, &result, RPC_INT, &error_num, RPC_END))
 666         return 0;
 667
 668     if (mcfs_is_error (result, error_num))
 669         return 0;
 670
 671     handle = result;
 672
 673     mcfs_info = g_new (opendir_info, 1);
 674     mcfs_info->conn = mc;
 675     mcfs_info->handle = handle;
 676     mcfs_info->entries = 0;
 677     mcfs_info->current = 0;
 678
 679     return mcfs_info;
 680 }
 681
 682 static int mcfs_get_stat_info (mcfs_connection * mc, struct stat *buf);
 683
 684 static int
 685 mcfs_loaddir (opendir_info *mcfs_info)
 686 {
 687     int status, error;
 688     mcfs_connection *mc = mcfs_info->conn;
 689     int link = mc->sock;
 690     int first = 1;
 691
 692     rpc_send (link, RPC_INT, MC_READDIR, RPC_INT, mcfs_info->handle,
 693               RPC_END);
 694
 695     for (;;) {
 696         int entry_len;
 697         dir_entry *new_entry;
 698
 699         if (!rpc_get (link, RPC_INT, &entry_len, RPC_END))
 700             return 0;
 701
 702         if (entry_len == 0)
 703             break;
 704
 705         new_entry = g_new (dir_entry, 1);
 706         new_entry->text = g_new0 (char, entry_len + 1);
 707
 708         new_entry->next = 0;
 709         if (first) {
 710             mcfs_info->entries = new_entry;
 711             mcfs_info->current = new_entry;
 712             first = 0;
 713         } else {
 714             mcfs_info->current->next = new_entry;
 715             mcfs_info->current = new_entry;
 716         }
 717
 718         if (!rpc_get
 719             (link, RPC_BLOCK, entry_len, new_entry->text, RPC_END))
 720             return 0;
 721
 722         /* Then we get the status from the lstat */
 723         if (!rpc_get (link, RPC_INT, &status, RPC_INT, &error, RPC_END))
 724             return 0;
 725
 726         if (mcfs_is_error (status, error))
 727             new_entry->merrno = error;
 728         else {
 729             new_entry->merrno = 0;
 730             if (!mcfs_get_stat_info (mc, &(new_entry->my_stat)))
 731                 return 0;
 732         }
 733     }
 734     mcfs_info->current = mcfs_info->entries;
 735
 736     return 1;
 737 }
 738
 739 static void
 740 mcfs_free_dir (dir_entry *de)
 741 {
 742     if (!de)
 743         return;
 744     mcfs_free_dir (de->next);
 745     g_free (de->text);
 746     g_free (de);
 747 }
 748
 749 static union vfs_dirent mcfs_readdir_data;
 750
 751 /* The readdir routine loads the complete directory */
 752 /* It's too slow to ask the server each time */
 753 /* It now also sends the complete lstat information for each file */
 754 static struct stat *cached_lstat_info;
 755
 756 static void *
 757 mcfs_readdir (void *info)
 758 {
 759     opendir_info *mcfs_info;
 760     char *dirent_dest;
 761
 762     mcfs_info = (opendir_info *) info;
 763
 764     if (!mcfs_info->entries)
 765         if (!mcfs_loaddir (mcfs_info))
 766             return NULL;
 767
 768     if (mcfs_info->current == 0) {
 769         cached_lstat_info = 0;
 770         mcfs_free_dir (mcfs_info->entries);
 771         mcfs_info->entries = 0;
 772         return NULL;
 773     }
 774     dirent_dest = mcfs_readdir_data.dent.d_name;
 775     g_strlcpy (dirent_dest, mcfs_info->current->text, MC_MAXPATHLEN);
 776     cached_lstat_info = &mcfs_info->current->my_stat;
 777     mcfs_info->current = mcfs_info->current->next;
 778
 779     compute_namelen (&mcfs_readdir_data.dent);
 780
 781     return &mcfs_readdir_data;
 782 }
 783
 784 static int
 785 mcfs_closedir (void *info)
 786 {
 787     opendir_info *mcfs_info = (opendir_info *) info;
 788     dir_entry *p, *q;
 789
 790     rpc_send (mcfs_info->conn->sock, RPC_INT, MC_CLOSEDIR,
 791               RPC_INT, mcfs_info->handle, RPC_END);
 792
 793     for (p = mcfs_info->entries; p;) {
 794         q = p;
 795         p = p->next;
 796         g_free (q->text);
 797         g_free (q);
 798     }
 799     g_free (info);
 800     return 0;
 801 }
 802
 803 static time_t
 804 mcfs_get_time (mcfs_connection *mc)
 805 {
 806     int sock = mc->sock;
 807
 808     if (mc->version == 1) {
 809         struct tm tt;
 810
 811         rpc_get (sock,
 812                  RPC_INT, &tt.tm_sec,
 813                  RPC_INT, &tt.tm_min,
 814                  RPC_INT, &tt.tm_hour,
 815                  RPC_INT, &tt.tm_mday,
 816                  RPC_INT, &tt.tm_year, RPC_INT, &tt.tm_mon, RPC_END);
 817         tt.tm_year -= 1900;
 818         tt.tm_isdst = 0;
 819
 820         return mktime (&tt);
 821     } else {
 822         char *buf;
 823         long tm;
 824
 825         rpc_get (sock, RPC_STRING, &buf, RPC_END);
 826         sscanf (buf, "%lx", &tm);
 827         g_free (buf);
 828
 829         return (time_t) tm;
 830     }
 831 }
 832
 833 static int
 834 mcfs_get_stat_info (mcfs_connection *mc, struct stat *buf)
 835 {
 836     long mylong;
 837     int sock = mc->sock;
 838
 839     buf->st_dev = 0;
 840
 841     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 842 #ifdef HAVE_STRUCT_STAT_ST_RDEV
 843     buf->st_rdev = mylong;
 844 #endif
 845     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 846     buf->st_ino = mylong;
 847     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 848     buf->st_mode = mylong;
 849     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 850     buf->st_nlink = mylong;
 851     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 852     buf->st_uid = mylong;
 853     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 854     buf->st_gid = mylong;
 855     rpc_get (sock, RPC_INT, &mylong, RPC_END);
 856     buf->st_size = mylong;
 857
 858     if (!rpc_get (sock, RPC_INT, &mylong, RPC_END))
 859         return 0;
 860 #ifdef HAVE_STRUCT_STAT_ST_BLOCKS
 861     buf->st_blocks = mylong;
 862 #endif
 863     buf->st_atime = mcfs_get_time (mc);
 864     buf->st_mtime = mcfs_get_time (mc);
 865     buf->st_ctime = mcfs_get_time (mc);
 866     return 1;
 867 }
 868
 869 static int
 870 mcfs_stat_cmd (int cmd, const char *path, struct stat *buf)
 871 {
 872     char *remote_file;
 873     mcfs_connection *mc;
 874     int status, error;
 875
 876     if ((remote_file = mcfs_get_path (&mc, path)) == 0)
 877         return -1;
 878
 879     rpc_send (mc->sock, RPC_INT, cmd, RPC_STRING, remote_file, RPC_END);
 880     g_free (remote_file);
 881     if (!rpc_get (mc->sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
 882         return mcfs_set_error (-1, errno);
 883
 884     if (mcfs_is_error (status, error))
 885         return -1;
 886
 887     if (mcfs_get_stat_info (mc, buf))
 888         return 0;
 889     else
 890         return mcfs_set_error (-1, EIO);
 891 }
 892
 893 static int
 894 mcfs_stat (struct vfs_class *me, const char *path, struct stat *buf)
 895 {
 896     (void) me;
 897
 898     return mcfs_stat_cmd (MC_STAT, path, buf);
 899 }
 900
 901 static int
 902 mcfs_lstat (struct vfs_class *me, const char *path, struct stat *buf)
 903 {
 904     int path_len = strlen (path);
 905     int entry_len = strlen (mcfs_readdir_data.dent.d_name);
 906
 907     (void) me;
 908
 909     /* Hack ... */
 910     if (strcmp (path + path_len - entry_len,
 911                 mcfs_readdir_data.dent.d_name) == 0 && cached_lstat_info) {
 912         *buf = *cached_lstat_info;
 913         return 0;
 914     }
 915     return mcfs_stat_cmd (MC_LSTAT, path, buf);
 916 }
 917
 918 static int
 919 mcfs_fstat (void *data, struct stat *buf)
 920 {
 921     mcfs_handle *info = (mcfs_handle *) data;
 922     int result, error;
 923     int handle, sock;
 924
 925     sock = info->conn->sock;
 926     handle = info->handle;
 927
 928     rpc_send (sock, RPC_INT, MC_FSTAT, RPC_INT, handle, RPC_END);
 929     if (!rpc_get (sock, RPC_INT, &result, RPC_INT, &error, RPC_END))
 930         return mcfs_set_error (-1, EIO);
 931
 932     if (mcfs_is_error (result, error))
 933         return -1;
 934
 935     if (mcfs_get_stat_info (info->conn, buf))
 936         return 0;
 937     else
 938         return mcfs_set_error (-1, EIO);
 939 }
 940
 941 static int
 942 mcfs_chmod (struct vfs_class *me, const char *path, int mode)
 943 {
 944     (void) me;
 945
 946     return mcfs_rpc_path_int (MC_CHMOD, path, mode);
 947 }
 948
 949 static int
 950 mcfs_chown (struct vfs_class *me, const char *path, int owner, int group)
 951 {
 952     (void) me;
 953
 954     return mcfs_rpc_path_int_int (MC_CHOWN, path, owner, group);
 955 }
 956
 957 static int
 958 mcfs_utime (struct vfs_class *me, const char *path, struct utimbuf *times)
 959 {
 960     mcfs_connection *mc;
 961     int status;
 962     char *file;
 963
 964     (void) me;
 965
 966     if (!(file = mcfs_get_path (&mc, path)))
 967         return -1;
 968
 969     status = 0;
 970     if (mc->version >= 2) {
 971         char abuf[BUF_SMALL];
 972         char mbuf[BUF_SMALL];
 973         long atime, mtime;
 974
 975         atime = (long) times->actime;
 976         mtime = (long) times->modtime;
 977
 978         g_snprintf (abuf, sizeof (abuf), "%lx", atime);
 979         g_snprintf (mbuf, sizeof (mbuf), "%lx", mtime);
 980
 981         rpc_send (mc->sock, RPC_INT, MC_UTIME,
 982                   RPC_STRING, file,
 983                   RPC_STRING, abuf, RPC_STRING, mbuf, RPC_END);
 984         status = mcfs_handle_simple_error (mc->sock, 0);
 985
 986     }
 987     g_free (file);
 988     return (status);
 989 }
 990
 991 static int
 992 mcfs_readlink (struct vfs_class *me, const char *path, char *buf, size_t size)
 993 {
 994     char *remote_file, *stat_str;
 995     int status, error;
 996     mcfs_connection *mc;
 997     size_t len;
 998
 999     (void) me;
1000
1001     if (!(remote_file = mcfs_get_path (&mc, path)))
1002         return -1;
1003
1004     rpc_send (mc->sock, RPC_INT, MC_READLINK, RPC_STRING, remote_file,
1005               RPC_END);
1006     g_free (remote_file);
1007     if (!rpc_get (mc->sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
1008         return mcfs_set_error (-1, EIO);
1009
1010     if (mcfs_is_error (status, errno))
1011         return -1;
1012
1013     if (!rpc_get (mc->sock, RPC_STRING, &stat_str, RPC_END))
1014         return mcfs_set_error (-1, EIO);
1015
1016     len = strlen (stat_str);
1017     if (len < size)
1018        size = len;
1019     /* readlink() does not append a NUL character to buf */
1020     memcpy (buf, stat_str, size);
1021     g_free (stat_str);
1022     return size;
1023 }
1024
1025 static int
1026 mcfs_unlink (struct vfs_class *me, const char *path)
1027 {
1028     (void) me;
1029
1030     return mcfs_rpc_path (MC_UNLINK, path);
1031 }
1032
1033 static int
1034 mcfs_symlink (struct vfs_class *me, const char *n1, const char *n2)
1035 {
1036     (void) me;
1037
1038     return mcfs_rpc_two_paths (MC_SYMLINK, n1, n2);
1039 }
1040
1041 static int
1042 mcfs_rename (struct vfs_class *me, const char *a, const char *b)
1043 {
1044     (void) me;
1045
1046     return mcfs_rpc_two_paths (MC_RENAME, a, b);
1047 }
1048
1049 static int
1050 mcfs_chdir (struct vfs_class *me, const char *path)
1051 {
1052     char *remote_dir;
1053     mcfs_connection *mc;
1054     int status, error;
1055
1056     (void) me;
1057
1058     if (!(remote_dir = mcfs_get_path (&mc, path)))
1059         return -1;
1060
1061     rpc_send (mc->sock, RPC_INT, MC_CHDIR, RPC_STRING, remote_dir,
1062               RPC_END);
1063     g_free (remote_dir);
1064     if (!rpc_get (mc->sock, RPC_INT, &status, RPC_INT, &error, RPC_END))
1065         return mcfs_set_error (-1, EIO);
1066
1067     if (mcfs_is_error (status, error))
1068         return -1;
1069     return 0;
1070 }
1071
1072 static int
1073 mcfs_lseek (void *data, off_t offset, int whence)
1074 {
1075     mcfs_handle *info = (mcfs_handle *) data;
1076     int handle, sock;
1077
1078     sock = info->conn->sock;
1079     handle = info->handle;
1080
1081     /* FIXME: off_t may be too long to fit */
1082     rpc_send (sock, RPC_INT, MC_LSEEK, RPC_INT, handle, RPC_INT,
1083               (int) offset, RPC_INT, whence, RPC_END);
1084
1085     return mcfs_handle_simple_error (sock, 1);
1086 }
1087
1088 static int
1089 mcfs_mknod (struct vfs_class *me, const char *path, int mode, int dev)
1090 {
1091     (void) me;
1092
1093     return mcfs_rpc_path_int_int (MC_MKNOD, path, mode, dev);
1094 }
1095
1096 static int
1097 mcfs_mkdir (struct vfs_class *me, const char *path, mode_t mode)
1098 {
1099     (void) me;
1100
1101     return mcfs_rpc_path_int (MC_MKDIR, path, mode);
1102 }
1103
1104 static int
1105 mcfs_rmdir (struct vfs_class *me, const char *path)
1106 {
1107     (void) me;
1108
1109     return mcfs_rpc_path (MC_RMDIR, path);
1110 }
1111
1112 static int
1113 mcfs_link (struct vfs_class *me, const char *p1, const char *p2)
1114 {
1115     (void) me;
1116
1117     return mcfs_rpc_two_paths (MC_LINK, p1, p2);
1118 }
1119
1120 /* Gives up on a socket and reopens the connection, the child own the socket
1121  * now
1122  */
1123 static void
1124 mcfs_forget (const char *path)
1125 {
1126     char *host, *user, *pass, *p;
1127     int port, i, vers;
1128
1129     if (strncmp (path, "/#mc:", 5))
1130         return;
1131
1132     path += 5;
1133     if (path[0] == '/' && path[1] == '/')
1134         path += 2;
1135
1136     if ((p =
1137          mcfs_get_host_and_username (path, &host, &user, &port,
1138                                      &pass)) == 0) {
1139         g_free (host);
1140         g_free (user);
1141         if (pass)
1142             wipe_password (pass);
1143         return;
1144     }
1145     for (i = 0; i < MCFS_MAX_CONNECTIONS; i++) {
1146         if ((strcmp (host, mcfs_connections[i].host) == 0) &&
1147             (strcmp (user, mcfs_connections[i].user) == 0) &&
1148             (port == mcfs_connections[i].port)) {
1149
1150             /* close socket: the child owns it now */
1151             close (mcfs_connections[i].sock);
1152
1153             /* reopen the connection */
1154             mcfs_connections[i].sock =
1155                 mcfs_open_tcp_link (host, user, &port, pass, &vers);
1156         }
1157     }
1158     g_free (p);
1159     g_free (host);
1160     g_free (user);
1161     if (pass)
1162         wipe_password (pass);
1163 }
1164
1165 static int
1166 mcfs_setctl (struct vfs_class *me, const char *path, int ctlop, void *arg)
1167 {
1168     (void) me;
1169     (void) arg;
1170
1171     switch (ctlop) {
1172     case VFS_SETCTL_FORGET:
1173         mcfs_forget (path);
1174         return 0;
1175     }
1176     return 0;
1177 }
1178
1179 void
1180 init_mcfs (void)
1181 {
1182     vfs_mcfs_ops.name = "mcfs";
1183     vfs_mcfs_ops.prefix = "mc:";
1184     vfs_mcfs_ops.fill_names = mcfs_fill_names;
1185     vfs_mcfs_ops.open = mcfs_open;
1186     vfs_mcfs_ops.close = mcfs_close;
1187     vfs_mcfs_ops.read = mcfs_read;
1188     vfs_mcfs_ops.write = mcfs_write;
1189     vfs_mcfs_ops.opendir = mcfs_opendir;
1190     vfs_mcfs_ops.readdir = mcfs_readdir;
1191     vfs_mcfs_ops.closedir = mcfs_closedir;
1192     vfs_mcfs_ops.stat = mcfs_stat;
1193     vfs_mcfs_ops.lstat = mcfs_lstat;
1194     vfs_mcfs_ops.fstat = mcfs_fstat;
1195     vfs_mcfs_ops.chmod = mcfs_chmod;
1196     vfs_mcfs_ops.chown = mcfs_chown;
1197     vfs_mcfs_ops.utime = mcfs_utime;
1198     vfs_mcfs_ops.readlink = mcfs_readlink;
1199     vfs_mcfs_ops.symlink = mcfs_symlink;
1200     vfs_mcfs_ops.link = mcfs_link;
1201     vfs_mcfs_ops.unlink = mcfs_unlink;
1202     vfs_mcfs_ops.rename = mcfs_rename;
1203     vfs_mcfs_ops.chdir = mcfs_chdir;
1204     vfs_mcfs_ops.ferrno = mcfs_errno;
1205     vfs_mcfs_ops.lseek = mcfs_lseek;
1206     vfs_mcfs_ops.mknod = mcfs_mknod;
1207     vfs_mcfs_ops.mkdir = mcfs_mkdir;
1208     vfs_mcfs_ops.rmdir = mcfs_rmdir;
1209     vfs_mcfs_ops.setctl = mcfs_setctl;
1210     vfs_register_class (&vfs_mcfs_ops);
1211 }
1212
1213 static void
1214 mcfs_free_bucket (int bucket)
1215 {
1216     g_free (mcfs_connections[bucket].host);
1217     g_free (mcfs_connections[bucket].user);
1218     g_free (mcfs_connections[bucket].home);
1219
1220     /* Set all the fields to zero */
1221     mcfs_connections[bucket].host =
1222         mcfs_connections[bucket].user = mcfs_connections[bucket].home = 0;
1223     mcfs_connections[bucket].sock = mcfs_connections[bucket].version = 0;
1224 }
1225
1226 static int
1227 mcfs_invalidate_socket (int sock)
1228 {
1229     int i, j = -1;
1230
1231     for (i = 0; i < MCFS_MAX_CONNECTIONS; i++)
1232         if (mcfs_connections[i].sock == sock) {
1233             mcfs_free_bucket (i);
1234             j = 0;
1235         }
1236
1237     if (j == -1)
1238         return -1;              /* It was not our sock */
1239     /* Break from any possible loop */
1240     mc_chdir ("/");
1241     return 0;
1242 }
1243
1244 void
1245 tcp_invalidate_socket (int sock)
1246 {
1247     mcfs_invalidate_socket (sock);
1248 }
1249
1250 #endif                          /* WITH_MCFS */