usmb.c

   1 /* usmb - mount SMB shares via FUSE and Samba
   2  * Copyright (C) 2006-2008 Geoff Johnstone
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 3 as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  */
  16
  17 #include <sys/time.h>        // struct timeval needed by libsmbclient.h
  18 #include <unistd.h>
  19 #include <libsmbclient.h>
  20 #include "samba30-compat.h"
  21 #include <fuse.h>
  22 #include <assert.h>
  23 #include <stdarg.h>
  24 #include <stdbool.h>
  25 #include <stddef.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include "conffile.h"
  30 #include "options.h"
  31 #include "usmb.h"
  32 #include "usmb_dir.h"
  33 #include "usmb_file.h"
  34 #include "utils.h"
  35 #include "version.h"
  36
  37
  38 SMBCCTX *ctx;
  39 static char *server, *share, *mountpoint, *options,
  40             *domain, *username, *password;
  41
  42
  43 char * make_url (const char *path)
  44 {
  45   assert (NULL != share);
  46
  47   if ((NULL == path) || ('\0' == path[0]))
  48     return xstrdup (share);
  49   else
  50     return concat_strings (2, share, path);
  51 }
  52
  53
  54 static inline void do_strncpy (char *to, const char *from, int tolen)
  55 {
  56   strncpy (to, from, tolen);
  57   to[tolen - 1] = '\0';
  58 }
  59
  60
  61 static void auth_fn (const char *srv UNUSED, const char *shr UNUSED,
  62                      char *wg, int wglen, char *un, int unlen,
  63                      char *pw, int pwlen)
  64 {
  65   DEBUG (fprintf (stderr, "Authenticating for \\\\%s\\%s\n", srv, shr));
  66   DEBUG (fprintf (stderr, "Domain: %s; User: %s; Password:%s\n",
  67                   domain, username, password));
  68
  69   if (NULL != domain)
  70     do_strncpy (wg, domain, wglen);
  71
  72   do_strncpy (un, username, unlen);
  73   do_strncpy (pw, password, pwlen);
  74 }
  75
  76
  77 static bool create_smb_context (char *domain, char *username, SMBCCTX **pctx)
  78 {
  79   *pctx = smbc_new_context();
  80
  81   if (NULL == *pctx)
  82   {
  83     perror ("Cannot create SMB context");
  84     return false;
  85   }
  86
  87   smbc_setWorkgroup (*pctx, domain);
  88   smbc_setUser (*pctx, username);
  89   smbc_setTimeout (*pctx, 5000);
  90   smbc_setFunctionAuthData (*pctx, auth_fn);
  91
  92   if (NULL == smbc_init_context (*pctx))
  93   {
  94     perror ("Cannot initialise SMB context");
  95     smbc_free_context (*pctx, 1);
  96     return false;
  97   }
  98
  99   return true;
 100 }
 101
 102
 103 #if 0
 104 static int usmb_statfs (const char *path, struct statvfs *vfs)
 105 {
 106   if ((NULL == path) || (NULL == vfs))
 107     return -EINVAL;
 108
 109   memset (vfs, 0, sizeof (*vfs));
 110
 111   vfs->f_bsize = 32768;
 112   vfs->f_blocks = 0x7FFFFFFFl;
 113   vfs->f_bfree = 0x7FFFFFFFl;
 114   vfs->f_bavail = 0x7FFFFFFFl;
 115
 116   return 0;
 117 }
 118 #endif
 119
 120
 121 static void * usmb_init (struct fuse_conn_info *conn UNUSED)
 122 {
 123   DEBUG (fputs ("usmb_init()\n", stderr));
 124   return NULL;
 125 }
 126
 127
 128 static void usmb_destroy (void *unused UNUSED)
 129 {
 130   DEBUG (fputs ("usmb_destroy()\n", stderr));
 131 }
 132
 133
 134 // probably won't (can't ?) implement these:
 135 // readlink mknod symlink flush fsync statfs
 136
 137 // no easy way of implementing these:
 138 // access ftruncate
 139
 140 #ifdef __lint
 141 #define SET_ELEMENT(name,value) value
 142 #else
 143 #define SET_ELEMENT(name,value) name = value
 144 #endif
 145 static struct fuse_operations fuse_ops = {
 146   SET_ELEMENT (.getattr, usmb_getattr),
 147   SET_ELEMENT (.readlink, NULL),
 148   SET_ELEMENT (.getdir, NULL),
 149   SET_ELEMENT (.mknod, NULL),
 150   SET_ELEMENT (.mkdir, usmb_mkdir),
 151   SET_ELEMENT (.unlink, usmb_unlink),
 152   SET_ELEMENT (.rmdir, usmb_rmdir),
 153   SET_ELEMENT (.symlink, NULL),
 154   SET_ELEMENT (.rename, usmb_rename),
 155   SET_ELEMENT (.link, NULL),
 156   SET_ELEMENT (.chmod, usmb_chmod),
 157   SET_ELEMENT (.chown, NULL), // usmb_chown, --not implemented in libsmbclient
 158   SET_ELEMENT (.truncate, usmb_truncate),
 159   SET_ELEMENT (.utime, usmb_utime),
 160   SET_ELEMENT (.open, usmb_open),
 161   SET_ELEMENT (.read, usmb_read),
 162   SET_ELEMENT (.write, usmb_write),
 163   SET_ELEMENT (.statfs, NULL),
 164   SET_ELEMENT (.flush, NULL),
 165   SET_ELEMENT (.release, usmb_release),
 166   SET_ELEMENT (.fsync, NULL),
 167   SET_ELEMENT (.setxattr, usmb_setxattr),
 168   SET_ELEMENT (.getxattr, usmb_getxattr),
 169   SET_ELEMENT (.listxattr, usmb_listxattr),
 170   SET_ELEMENT (.removexattr, usmb_removexattr),
 171   SET_ELEMENT (.opendir, usmb_opendir),
 172   SET_ELEMENT (.readdir, usmb_readdir),
 173   SET_ELEMENT (.releasedir, usmb_releasedir),
 174   SET_ELEMENT (.fsyncdir, NULL),
 175   SET_ELEMENT (.init, usmb_init),
 176   SET_ELEMENT (.destroy, usmb_destroy),
 177   SET_ELEMENT (.access, NULL),
 178   SET_ELEMENT (.create, usmb_create),
 179   SET_ELEMENT (.ftruncate, NULL),
 180   SET_ELEMENT (.fgetattr, usmb_fgetattr),
 181   SET_ELEMENT (.lock, NULL),                   // TODO: implement
 182   SET_ELEMENT (.utimens, NULL),                // TODO: implement
 183   SET_ELEMENT (.bmap, NULL),                   // TODO: implement
 184 };
 185
 186
 187 static bool create_share_name (const char *server, const char *sharename)
 188 {
 189   size_t len = strlen ("smb:///") +
 190                strlen (server) +
 191                strlen (sharename) + 1;
 192
 193   if (NULL == (share = malloc (len)))
 194   {
 195     perror ("Cannot allocate share name");
 196     return false;
 197   }
 198
 199   snprintf (share, len, "smb://%s/%s", server, sharename);
 200   DEBUG (fprintf (stderr, "Share URL: %s\n", share));
 201   return true;
 202 }
 203
 204
 205 static void free_strings (char *sharename)
 206 {
 207   xfree (sharename);
 208   clear_and_free (password);
 209   xfree (username);
 210   xfree (domain);
 211   xfree (options);
 212   xfree (mountpoint);
 213   xfree (share);
 214   xfree (server);
 215 }
 216
 217
 218 int main (int argc, char **argv)
 219 {
 220   const char *conffile, *mountid;
 221   char *sharename = NULL;
 222
 223   if (sizeof (uint64_t) < sizeof (uintptr_t))
 224   {
 225     fputs ("usmb is not supported on this platform.\n", stderr);
 226     return EXIT_FAILURE;
 227   }
 228
 229   {
 230     static char conf[256];
 231     snprintf (conf, sizeof (conf), "%s/.usmb.conf", getenv ("HOME"));
 232     conffile = conf;
 233   }
 234
 235   if (!parse_args (&argc, &argv, &mountid, &conffile))
 236     return EXIT_FAILURE;
 237
 238   show_about (stdout);
 239
 240   if (!conffile_get_mount (conffile, mountid,
 241                            &server, &sharename, &mountpoint, &options,
 242                            &domain, &username, &password))
 243     return EXIT_FAILURE;
 244
 245   if (!create_share_name (server, sharename) ||
 246       !create_smb_context (domain, username, &ctx))
 247   {
 248     free_strings (sharename);
 249     return EXIT_FAILURE;
 250   }
 251
 252   DEBUG (fprintf (stderr, "Username: %s\\%s\n", domain, username));
 253
 254   int fuse_argc;
 255   char **fuse_argv;
 256   build_fuse_args (options, mountpoint, &fuse_argc, &fuse_argv);
 257   int ret = fuse_main (fuse_argc, fuse_argv, &fuse_ops, NULL);
 258
 259   smbc_free_context (ctx, 1);
 260   free_strings (sharename);
 261
 262   return ret;
 263 }
 264