source4/ntvfs/simple/svfs_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    simple NTVFS filesystem backend
   5
   6    Copyright (C) Andrew Tridgell 2003
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21 /*
  22   utility functions for simple backend
  23 */
  24
  25 #include "includes.h"
  26 #include "system/filesys.h"
  27 #include "svfs.h"
  28 #include "system/time.h"
  29 #include "system/dir.h"
  30 #include "ntvfs/ntvfs.h"
  31 #include "ntvfs/simple/proto.h"
  32
  33 /*
  34   convert a windows path to a unix path - don't do any manging or case sensitive handling
  35 */
  36 char *svfs_unix_path(struct ntvfs_module_context *ntvfs,
  37                      struct ntvfs_request *req, const char *name)
  38 {
  39         struct svfs_private *p = ntvfs->private_data;
  40         char *ret;
  41         char *name_lower = strlower_talloc(p, name);
  42
  43         if (*name != '\\') {
  44                 ret = talloc_asprintf(req, "%s/%s", p->connectpath, name_lower);
  45         } else {
  46                 ret = talloc_asprintf(req, "%s%s", p->connectpath, name_lower);
  47         }
  48         all_string_sub(ret, "\\", "/", 0);
  49         talloc_free(name_lower);
  50         return ret;
  51 }
  52
  53
  54 /*
  55   read a directory and find all matching file names and stat info
  56   returned names are separate unix and DOS names. The returned names
  57   are relative to the directory
  58 */
  59 struct svfs_dir *svfs_list_unix(TALLOC_CTX *mem_ctx, struct ntvfs_request *req, const char *unix_path)
  60 {
  61         char *p, *mask;
  62         struct svfs_dir *dir;
  63         DIR *odir;
  64         struct dirent *dent;
  65         unsigned int allocated = 0;
  66         char *low_mask;
  67
  68         dir = talloc(mem_ctx, struct svfs_dir);
  69         if (!dir) { return NULL; }
  70
  71         dir->count = 0;
  72         dir->files = 0;
  73
  74         /* find the base directory */
  75         p = strrchr(unix_path, '/');
  76         if (!p) { return NULL; }
  77
  78         dir->unix_dir = talloc_strndup(mem_ctx, unix_path, PTR_DIFF(p, unix_path));
  79         if (!dir->unix_dir) { return NULL; }
  80
  81         /* the wildcard pattern is the last part */
  82         mask = p+1;
  83
  84         low_mask = strlower_talloc(mem_ctx, mask);
  85         if (!low_mask) { return NULL; }
  86
  87         odir = opendir(dir->unix_dir);
  88         if (!odir) { return NULL; }
  89
  90         while ((dent = readdir(odir))) {
  91                 unsigned int i = dir->count;
  92                 char *full_name;
  93                 char *low_name;
  94
  95                 if (strchr(dent->d_name, ':') && !strchr(unix_path, ':')) {
  96                         /* don't show streams in dir listing */
  97                         continue;
  98                 }
  99
 100                 low_name = strlower_talloc(mem_ctx, dent->d_name);
 101                 if (!low_name) { continue; }
 102
 103                 /* check it matches the wildcard pattern */
 104                 if (ms_fnmatch_protocol(low_mask, low_name, PROTOCOL_NT1,
 105                                         false) != 0) {
 106                         continue;
 107                 }
 108
 109                 if (dir->count >= allocated) {
 110                         allocated = (allocated + 100) * 1.2;
 111                         dir->files = talloc_realloc(dir, dir->files, struct svfs_dirfile, allocated);
 112                         if (!dir->files) {
 113                                 closedir(odir);
 114                                 return NULL;
 115                         }
 116                 }
 117
 118                 dir->files[i].name = low_name;
 119                 if (!dir->files[i].name) { continue; }
 120
 121                 full_name = talloc_asprintf(mem_ctx, "%s/%s", dir->unix_dir,
 122                                             dir->files[i].name);
 123                 if (!full_name) { continue; }
 124
 125                 if (stat(full_name, &dir->files[i].st) == 0) {
 126                         dir->count++;
 127                 }
 128
 129                 talloc_free(full_name);
 130         }
 131
 132         closedir(odir);
 133
 134         return dir;
 135 }
 136
 137 /*
 138   read a directory and find all matching file names and stat info
 139   returned names are separate unix and DOS names. The returned names
 140   are relative to the directory
 141 */
 142 struct svfs_dir *svfs_list(struct ntvfs_module_context *ntvfs, struct ntvfs_request *req, const char *pattern)
 143 {
 144         struct svfs_private *p = ntvfs->private_data;
 145         char *unix_path;
 146
 147         unix_path = svfs_unix_path(ntvfs, req, pattern);
 148         if (!unix_path) { return NULL; }
 149
 150         return svfs_list_unix(p, req, unix_path);
 151 }
 152
 153
 154 /*******************************************************************
 155 set the time on a file via file descriptor
 156 *******************************************************************/
 157 int svfs_file_utime(int fd, struct utimbuf *times)
 158 {
 159         char *fd_path = NULL;
 160         int ret;
 161
 162         ret = asprintf(&fd_path, "/proc/self/%d", fd);
 163         if (ret == -1) {
 164                 errno = ENOMEM;
 165                 return -1;
 166         }
 167
 168         if (!fd_path) {
 169                 errno = ENOMEM;
 170                 return -1;
 171         }
 172
 173         ret = utime(fd_path, times);
 174         free(fd_path);
 175         return ret;
 176 }
 177
 178
 179 /*
 180   map a unix file attrib to a DOS attribute
 181 */
 182 uint16_t svfs_unix_to_dos_attrib(mode_t mode)
 183 {
 184         uint16_t ret = 0;
 185         if (S_ISDIR(mode)) ret |= FILE_ATTRIBUTE_DIRECTORY;
 186         if (!(mode & S_IWUSR)) ret |= FILE_ATTRIBUTE_READONLY;
 187         return ret;
 188 }
 189