source4/ntvfs/cifs_posix_cli/svfs_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    simpler Samba VFS filesystem backend for clients which support the
   5    CIFS Unix Extensions or newer CIFS POSIX protocol extensions
   6
   7
   8    Copyright (C) Andrew Tridgell 2003
   9    Copyright (C) Steve French 2006
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24 /*
  25   utility functions for cifs posix backend
  26 */
  27
  28 #include "includes.h"
  29 #include "system/filesys.h"
  30 #include "cifsposix.h"
  31 #include "system/time.h"
  32 #include "system/dir.h"
  33 #include "ntvfs/ntvfs.h"
  34 #include "ntvfs/cifs_posix_cli/proto.h"
  35
  36 /*
  37   convert a windows path to a unix path - don't do any manging or case sensitive handling
  38 */
  39 char *cifspsx_unix_path(struct ntvfs_module_context *ntvfs,
  40                      struct ntvfs_request *req, const char *name)
  41 {
  42         struct cifspsx_private *p = ntvfs->private_data;
  43         char *ret;
  44         char *name_lower = strlower_talloc(p, name);
  45
  46         if (*name != '\\') {
  47                 ret = talloc_asprintf(req, "%s/%s", p->connectpath, name_lower);
  48         } else {
  49                 ret = talloc_asprintf(req, "%s%s", p->connectpath, name_lower);
  50         }
  51         all_string_sub(ret, "\\", "/", 0);
  52         talloc_free(name_lower);
  53         return ret;
  54 }
  55
  56
  57 /*
  58   read a directory and find all matching file names and stat info
  59   returned names are separate unix and DOS names. The returned names
  60   are relative to the directory
  61 */
  62 struct cifspsx_dir *cifspsx_list_unix(TALLOC_CTX *mem_ctx, struct ntvfs_request *req, const char *unix_path)
  63 {
  64         char *p, *mask;
  65         struct cifspsx_dir *dir;
  66         DIR *odir;
  67         struct dirent *dent;
  68         unsigned int allocated = 0;
  69         char *low_mask;
  70
  71         dir = talloc(mem_ctx, struct cifspsx_dir);
  72         if (!dir) { return NULL; }
  73
  74         dir->count = 0;
  75         dir->files = 0;
  76
  77         /* find the base directory */
  78         p = strrchr(unix_path, '/');
  79         if (!p) { return NULL; }
  80
  81         dir->unix_dir = talloc_strndup(mem_ctx, unix_path, PTR_DIFF(p, unix_path));
  82         if (!dir->unix_dir) { return NULL; }
  83
  84         /* the wildcard pattern is the last part */
  85         mask = p+1;
  86
  87         low_mask = strlower_talloc(mem_ctx, mask);
  88         if (!low_mask) { return NULL; }
  89
  90         odir = opendir(dir->unix_dir);
  91         if (!odir) { return NULL; }
  92
  93         while ((dent = readdir(odir))) {
  94                 unsigned int i = dir->count;
  95                 char *full_name;
  96                 char *low_name;
  97
  98                 if (strchr(dent->d_name, ':') && !strchr(unix_path, ':')) {
  99                         /* don't show streams in dir listing */
 100                         continue;
 101                 }
 102
 103                 low_name = strlower_talloc(mem_ctx, dent->d_name);
 104                 if (!low_name) { continue; }
 105
 106                 /* check it matches the wildcard pattern */
 107                 if (ms_fnmatch_protocol(low_mask, low_name, PROTOCOL_NT1) != 0) {
 108                         continue;
 109                 }
 110
 111                 if (dir->count >= allocated) {
 112                         allocated = (allocated + 100) * 1.2;
 113                         dir->files = talloc_realloc(dir, dir->files, struct cifspsx_dirfile, allocated);
 114                         if (!dir->files) {
 115                                 closedir(odir);
 116                                 return NULL;
 117                         }
 118                 }
 119
 120                 dir->files[i].name = low_name;
 121                 if (!dir->files[i].name) { continue; }
 122
 123                 asprintf(&full_name, "%s/%s", dir->unix_dir, dir->files[i].name);
 124                 if (!full_name) { continue; }
 125
 126                 if (stat(full_name, &dir->files[i].st) == 0) {
 127                         dir->count++;
 128                 }
 129
 130                 free(full_name);
 131         }
 132
 133         closedir(odir);
 134
 135         return dir;
 136 }
 137
 138 /*
 139   read a directory and find all matching file names and stat info
 140   returned names are separate unix and DOS names. The returned names
 141   are relative to the directory
 142 */
 143 struct cifspsx_dir *cifspsx_list(struct ntvfs_module_context *ntvfs, struct ntvfs_request *req, const char *pattern)
 144 {
 145         struct cifspsx_private *p = ntvfs->private_data;
 146         char *unix_path;
 147
 148         unix_path = cifspsx_unix_path(ntvfs, req, pattern);
 149         if (!unix_path) { return NULL; }
 150
 151         return cifspsx_list_unix(p, req, unix_path);
 152 }
 153
 154
 155 /*******************************************************************
 156 set the time on a file via file descriptor
 157 *******************************************************************/
 158 int cifspsx_file_utime(int fd, struct utimbuf *times)
 159 {
 160         char *fd_path = NULL;
 161         int ret;
 162
 163         asprintf(&fd_path, "/proc/self/%d", fd);
 164         if (!fd_path) {
 165                 errno = ENOMEM;
 166                 return -1;
 167         }
 168
 169         ret = utime(fd_path, times);
 170         free(fd_path);
 171         return ret;
 172 }
 173
 174
 175 /*
 176   map a unix file attrib to a DOS attribute
 177 */
 178 uint16_t cifspsx_unix_to_dos_attrib(mode_t mode)
 179 {
 180         uint16_t ret = 0;
 181         if (S_ISDIR(mode)) ret |= FILE_ATTRIBUTE_DIRECTORY;
 182         if (!(mode & S_IWUSR)) ret |= FILE_ATTRIBUTE_READONLY;
 183         return ret;
 184 }
 185